OEiCiJ.:+,4 - Creapromedia

Transcription

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2. FRONT PANEL FACILITIES
C a s s e t t ec o m p a r t m e n t r l l u m i n a t i o n
OpowenswlrcH
. he
T h e p o w e r c o m e so n w h e n t h e P O W E R s w i t c h i s d e p r e s s e d T
l e v e l m e t e r a n d t a p e c o u n t e r , a n d t h e c a s s e t t ec o m p a r t m e n t
i l l u m i n a t i o n ' w i l lt h e n c o m e o n .
€)DUSTCOVER
W h e n y o u a r e n o t u s i n g t h e d e c k , a l w a y sk e e p t h i s c o v e r i n p l a c e
t o p r e v e n t d u s t a n d d i r t f r o m a d h e r i n gt o t h e h e a d s e c t i o na n d
r o t a t r n Ep a r t s .
T A P EM A R K E R
@REMAINING
l f t h i s m a r k e r i s v i s i b l e ,i t m e a n st h a t t h e r e i s e n o u g ht a p e r e m a i n i n q f o r s e v e r am
l i n u t e so f r e c o r d i n go r p l a y b a c k .
@ ) r N p u T( R E C O R D T NLGE V E L )C O N T R O L S
I O H E A D P H O N E JSA C K
This is the output
jack for your stereo headphones. You will be
a b l e t o h e a r s o u n d f r o m s i g n à l ss e l e c t e d b y t h e M O N I T O R s w i t c h es Use this Jack when you wànt to monitor the quality of a
recordrng or when you wanl to listen to a làpe pilvately on the
C T F 9 5 0 A d j u s l t h e o u t p u t l e v e lw i t h t h e O U T P U T c o n t r o l s .
NOTES:
a Use lou-tmpedance heodphones If you use o high-imped,once
model, you uill not be oble to obtoin sufficrcnt uolume
c You u'ill domage thë microphone
if you plug it into the
HEADPHO.\'E:S jock by mistahe
sELEcroR
swtrcH
@rrueur
Use this switch to select the program source which you intend to
U s e t h e s e t o a d j u s t t h e l e v e l o f t h e i n p u t s i g n a l sf r o m t h e M I C
j a c k so r r e a r p a n e lI N P U T i a c k s .
T u r n i n g t h e s ec o n t r o l s t o t h e r i g h t i n c r e a s etsh e l e v e l
record
LINE:
Set to
T h e c o n t r o l s a r e c o u p l e d t o t h e l e f t a n d r i g h t c h a n n e t s ,b u t
y o u c a n a l s o u s e t h e m t o a d j u s t t h e r i g h t c h a n n e l( b a c k ) a n d
t h e 1 g 1c1h a n n e l( f r o n t ) i n d e p e n d e n t l y
MIC:
Set to this position for recording signals from a microp h o n e , o r m i c r o p h o n e s ,c o n n e c t e d t o t h e M l C , a c k s .
L E V E L co
) N T RoLS
@ o u r p u r ( e L A Y B A cK
U s e t h e s et o a d j u s t t h e o u t p u t s i g n a ll e v e l d u r i n g p l a y b a c k .T u r n i n g t h e c o n t r o l s t o t h e r i g h t i n c r e a s e tsh e l e v e l .T h e c o n t r o l s a r e
c o u p l e d w h e n t u r n e d b u t i t i s a l s o p o s s i b l et o a d j u s t t h e r i g h t
c h a n n e l( b a c k ) a n d t h e l e f t c h a n n e l( f r o n t ) i n d e p e n d e n t l y .
W h e n p l a y i n g b a c k a r e f e r e n c et a p e ( 1 6 0 n w b i m ) , a r e f e r e n c e
p l a y b a c k l e v e l ( 0 d B ) i s o b t a i n e dw i t h t h e s ec o n t r o l ss e t t o t h e " 6 "
click stopposition.
@ r n p eS E L E C T o R
T h i s s e l e c t o r a l l o w s t h e b i a s a n d e q u a l i z e rc h a r a c t e r i s t . i ct os b e
s e l e c t e dd u r i n g r e c o r d i n ga n d t h e e q u a l i z e rc h a r a c t e r i s t i cdsu r i n g
p l a y b a c kI n l i n e w i t h t h e t y p e o f t a p e y o u a r e u s i n g
M E T A L : F o r u s i n gm e t a lt a p e s
F o r u s i n go r d i n a r yo r L H r a p e s
STD:
CrOr:
F o r u s i n gc h r o m et a p e s
Fe-Cr:
F o r u s i n gf e r r i c h r o m et a p e s
oMrc ,ACKS
T h e s ea r e t h e i n p u t j a c k s f o r m i c r o p h o n er e c o r d i n g p l u g t h e l e f t
c h a n n e lm i c r o p h o n ei n t o t h e L l a c k a n d t h e r i g h t c h a n n e lm i c r o phone into the R .iack.
this position for recording a program source
which is connected ro the rear panel INPUT jacks.
NOTE
You will be oble to record Eignals from the INPUT jachs il
LINE
suitch
is depressed euen when
the microphone.
plugged into the MIC jochs
@ o o L g y * N Rs w t r c H
5 e t t h i s s w i t c h t o O N f o r r e c o r d i n gw i t h t h e b u i l t - i n D o l b y n o i s e
r e d u c t i o n s y s t e m a n d f o r t h e p l a y b a c k o f r a p e sw h i c h h a v e b e e n
r e c o r d e du s i n gt h e D o l b y N R s v s t e m .
@arnscoNTRoL
U s e t h i s c o n t r o l t o a d l u s t t h e b r a s i n a c c o r d a n c ew i t h t h e
c h a r a c t e r i s t i cosf t h e t a p e b e i n g u s e d l r i s s e t s o t h a t t h e c e n t e r
( c l i c k s t o p ) p o s i t i o n c o r r e s p o n d st o t h e s t a n d a r db i a s .
@ M O N t T O RS W T T C H E S
Y o u w i l l b e a b l e t o l i s r e nt o t h e r e c o r d e ds i g n a l s( p l a y b a c ks o u n d )
i f y o u d e p r e s sr h e T A P E w h i l e y o u a r e r e c o r d t n ga p r o g r a m .
Y o u w i l l b e a b l e t o l i s r e n r o r h e s i g n a l s( r e c o r d i n gi n p u r ) j u s t
b e f o r e t h e y a r e r e c o r d e d i f y o u d e p r e s st h e S O U R C E . U s e r h e s e
s w i r c h e st o m o n i t o r y o u r r e c o r d i n g D e p r e s st h e T A p E d u r i n g
o l a vb a c k
* N 4 a n u f a c t u r e du n d e r l i c e n s e f r o m D o l b y , L a b o r a t o r r e s .
*Dolbr and
[[
4
the
ore
.]rc trddemarksof Dolbr.,Laboratories
GT-F95Cl
1. SPECIFICATION
2-channelstereo
Compactcassette,
Capstandrive;DC servomotor x I
Reeldrive;DC high torque motor x 1
Ferrite recordingl
Heads .
tYPe headx 1
combination
PlaYback
erasingheadx 1
'
A
p
p
r
o
x
i
m
a t e l 8y 5 s e c o n d s
.
.
"
F a s tW i n d i n gT i m e
(C-60tape)
0
'
0
4
%( W R M S )
t
h
a
n
m
o
r
e
.
N
o
.
.
W o wa n d F l u t t e r
Systems
Motors
FrequencyResponse
-20d8 Recording
Standard,LH taPes
FerrichrometaPe
Chromiumdioxidetape . .
Metaltape
' ' ' 20 to 17'000H2
(25 to15,000H2t 3dB)
- - ' '2O to 19,000H2
(25 to 17,000H2I 3dB)
" "2O to 19'000H2
(25 to t 7,000H2t 3dB)
' ' ' '20 to 19'000H2
(25 to 18,oooHzt 3dB)
OdBRecording
20 to 11,000H2
Chromiumdioxide t a p e . .
20 to 14,000H2
Metal tape
59dB
Ratio . D o l b y N R O F F ; M o r et h a n
Signal-to-Noise
69dB
t
h
a
n
D o l b yN R O N ; M o r e
( o v e r5 k H z )
: : i: liiTi:i:
PowerRequirements
PowerConsumPtion
Max'
. 420(w)x 187(H)x 365.5(D)mm
Dimensions
in'
x 7'318x'14'318
16'9116
Weight
Furnishedparts. .
' ' 1 0 ' 1 k g( 2 2 1 b 4 o z ' l
cordswith
connectinS
. . Stereo
P i n P l u g sx 2
swabsx 3
cleaning
Head
x 1
instructions
OPerating
NOTE:
possiblemodifi'
iir"ifi"otio"s and the design subject to
improuements'
to
due
notice
càtionwithout
NOTES:
l. Raterence
& LH: DIN 45513/BLATT6or
lor equiv'
: CrO,: DIN 45513/BLATTTlCrOt
(16O
level
indicatitlg
OdB
Meter
2. ReterenceRecording Level:
levell
nwb/m magneticlevel= Philipscassettereference
3 . Reference Signal: 333H2
compensatron
4 . Wow & Flutter: o JIS [3kHz, with acoustic
(weightedl, rms valuel
-2OdB twet' OOLBY
5 . Frequency Response: r Measured at
NR OFF,level deviation is !6dB without indication'
harmonic distor'
6. Sign"l to Nois€ Ratio: o Measured al the third
tion 3% level, weighted.
reference recording
7 . Sensitivity: inpur level (mV) required for
level with input (RECI controls s€t to maximum'
S.MaximumA|lowab|eInpul:Whi|âdecreasingsettingsofinput
thisis
(RECI level controls and increasing level at input iacks'
recording
poinl
where
(mVl
the
at
level
the maximum input
amplif ier output waveform becomês clipped'
level when meter
9 . Reference Output Level: Playback output
indicates OdB.
level with reipêct to
1 0 . Maximum Output Level: Playback output
(PLAYI
l€vel controls
output
reference recording level when
are set 10 maximum.
iack
Semiconductors...
T r a n s i s t o r s7x6
Diodesx 84, PhotointerruPterx 1
lCsxl3
Subfunctions
i
n
d
i
c
a
t
o
rl a m p
. O o t U yN R s y s t e m( O N O F F ) w i t h L E D
+7dB)
(-20
to
. Fluorescenttube levelmeter
selector)
(Peak/Peakhold/average
a Fluorescent taPecounter
o Biasfine adlustingcontrol knob
PlaY
a MemorystoP/MemorY
a Counterrepeat/EndrePeat
O
a
a
o
o
o
I nput selector
Automatic tapeslackcanceller
compartmentillumination
Cassette
Standbymechanismwith unattendedrecording
TapeSelector4 Position.
Click StoP.OutPut VR'
42O(Wl x 187(Hl x 365.5(D)mm Max.
* with rackmount adaptor JA'R102
* 48OlW) x 187lHlx 3801D) mm Max.
Unil: mm
3. LEVEL DIAGRAM
PLAYBACK
P8 LEVEL
ADJ.
F LAT AI,IP
P8 AMP
DOLEY
AMP
OUTPIJT
VR
LINE
ouTPul
s.]01-|
OISPLâY AHP
souRcE
auel
HEADPHoNEs
G o i n7 . 4 r l B
I
\l
I
I -scav
7V)
l.l8V
l(l.12vl
LINE OUl
- 7tl8V
-6d8v
(o.5v)
- 6.a(DV
(o.a7vt
AtaP Goln
o.44vl
- 23dBV
o
o
-20
VR Lc.
3dB
I ( 3 6 ' 2m v )
- 24dBV
(63.lmv )
RL' 8Â
F LAT AMP Goin
| 3dB
J
u,
u,
- 36GV
J
vR Lo.r
ild
PB AilP Goin
.19d8
Not.;
. O d B V' l V
. Fr.qu.Êct i 333H2
-74dBv
er-Fs|5cl
C L O S 6 O L O O P O I J A LC A P S T A N
2 MOTOR TAPÊ TRANSPORTSYSTEM
a<>}a4a
I
Èf
-
-o
swlTcHEs
@opeRnrtruc
.rt (REW):
t)
I
(STOPI:
>
(PLAY}:
BEC:
D e p r e s st h i s s w i t c h t o r e w i n d t h e t a p e .( T h e t a p e
w i l l t r a v e l a t h i g h s p e e df r o m r i g h t t o l e f t . )
D e p r e s st h i s s w i t c h t o s e n d t h e t a p e f o r w a r d a t
high speed. (The tape will travel from left to
right.)
D e o r e s st h i s s w i t c h t o s t o p t h e t a p e r u n a n d t o
r e l e a s et h e o p e r a t i n g s w i t c h e s .
D e p r e s st h i s s w i t c h w h e n p l a y i n g b a c k a
(The tape will travelfrom left to right.)
Depressthis switch together with the PLAY
switch for recording.
T h i s s w i t c h w i l l n o t w Ù r k w h e n a c a s s e t t ei s n o t
l o a d e d o r w h e n t h e e r a s u r ep r e v e n t i o n t a b s o f a
l o a d e d c a s s e t t eh a v e b e e n b r o k e n o f f .
D e p r e s st h i s s w i t c h t o s t o p t h e t a p e t e m p o r a r i l y
d u r i n g r e c o r d i n g o r p l a y b a c k . D e p r e s si t a g a i n t o
allow the tape tc continue to travelas before.
rNDrcAToR
@ uEruonY/REPEAT
T h i s i n d i c a t o rc o m e so n w h e n t h e M E M O R Y / R E P E A T s w i t c h e s
a r e d e p r e s s e d ,s i g n i f y i n g t h a t t h e d e c k i s s e t t o t h e r e s p e c t i v e
mooe.
swlrcHEs
@memonYlREPEAT
M E M O R Y : D e p r e s st h i s s w i t c h a n d t h e t a p e w i l l b e r e w o u n d t o
STOP t h a t s p o t a t w h i c h t h e t a p e c o u n t e r w a s p r e s e t t o
"000" during reclplay, when the REW switch is
d e p r e s s e da t a n y p o s i t i o n y o u l i k e .
D e p r e s st h i s s w i t c h a n d t h e t a p e w i l l b e r e w o u n d t o
that spot at which the tape counter was preset to
"000" during reclplay, and playback will start from
that spot, when the REW switch is depressedat any
position you like.
REPEAT
COUNTER: D e p r e s st h i s s w i t c h w h e n y o u w a n t t o p l a y b a c k a
tape during playback or recordingfrom the point at
which the tape counter was set to "000" up to the
end of the tape.
END: D e p r e s st h i s s w i t c h w h e n y o u w a n t t o p l a y b a c k a
t a p e f r o m t h e b e g i n n i n gt o t h e e n d o f t h â t t a p e .
O F F : D e p r e s st h i s s w i t c h d u r i n g n o r m a l t a p e p l a y b a c k o r
r e c o r d i n g t o r e l e a s et h e M E M O R Y a n d R E P E A T
gWitCheS.
NOÎES;
a When ony of the operating
suitches are depressed, the cor(except
uill
come on
responding
indicator
STOP mode)
signifying that the dech i8 set to that respective mode.
. Att the opercting suitcâ€s are released, (OFF) to stop mode
uhen the POWER switch ls turned OFF'
BUTToN
@courureRRESET
D e p r e s st h i s b u t t o n t o r e s e tt h e t a p e c o u n t e r d i s p l a y t o " 0 0 0 . "
@rnpe couNTER
swtrcHEs
@mrrrn
PEAK:
The meter functions as a peak lcrrel meter when
PEAK HOLD:
This indicates the position of the tape run. The counter reset to
" 0 0 0 " w h e n t h e p o w e r i s s w i t c h e do n ,
AVERAGE:
@lsvrl METER
T h i s i n d i c a t e st h e i n p u t l e v e l d u r i n g r e c o r d i n ga n d t h e o u t p u t l e v e l
during playback.
8y operating the METER switches, it can be made to function
asa peak meter, a peak hold meter or asa levelmeter.
The input signal level is indicated when the MONITOR switch
S O U R C E h a s b e e n d e p r e s s e d ,a n d t h e p l a y b a c k ' o u t p u t l e v e l i s
i n d i c a t e d w h e n t h e M O N I T O R s w i t c h T A P E h a s b e e nd e p r e s s e d .
@o o l a Y N R tN D tcA T o R
srARTswlTcHEs
@rtmen
Depress thesc switches when you are playing back or
M E T A L : T h i s l i g h t c o m e s o n when the TAPE selector is set to
METAL.
This light comes on when the TAPE selector is set to
CrOr:
CrO2.
recording a
t a p e w i t h t h e u s eo f a t i m c r .
When this switch is depressed,the dcck will automàticalREC:
l y b e s e t t o t h e r e c o r d i n gm o d e a t t h c p r e s t t t i m e r t i m e ,
and recording wilt begin. Use this switch for recordint
FM programs when you are out of the house or other'
PLAY:
This lights up when the DOLBY NR switch is set to ON and it
indicates that a tape is being recorded or played back with the
Dolby NR system.
@ræe lNDlcAToRs
this switch is dePressed.
The meter functions as a peak level meter and
the highest level of the signals is indicated when
this switch is dePressed.
The meter functions as a level meter when this
switch is depressed.
OFF:
wiseoccuPied.
W h e n t h i s s w i t c h i s d e p r e s s e dt,h e d e c k w i l l a u t o m a t i c a l l y b e s e t t o t h e p t a y b a c k m o d c a t t h e p r e s e tt i m e r t i m e ,
and playback will begin' Use this switch for wake'up
p l a y b a c k i n s t e a do f a n a l a r m c l o c k .
A l w a y s d e p r e s st h i s s w i t c h w h e n y o u d o n o t i n t e n d t o
recotd or playback a tape using the timer' (This will
release the REC and PLAY switches of TIMER
sTA RT.)
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'?
MechanicalAssembly
When replacing a motor or a belt, be careful of
the sequenceof disassemblyand reassemblyof the
various components concerned.
1. Remove the capstan motor by undoing screws
Oto @.
2. Remove solenoid A by undoing screwsO to ().
3. Remove the plunger chassisassemblyby undoing
scre\ils Oto 9.
4. Remove the sub-c*rassisassembly by undoing
screwsI to (0.
5. Remove the take-up motor by undoing screws
@ and O, and remove solenoid B by undoing
screws(D and O.
SubchæsisassemblY
SolenoidB
Take-upmotor
Supplypulleyassembly
Capstanmotor
Sub belt
chassis
asembly
Flywheelassembly
Capstanbelt
UL cord clamperD
SolenoidA
Fig. 4-5
Disassemblyof mechanismasembly
cT-Fg|scl
MechanicalAssemblY
After removing the front panel, undo screws
Oto@.
Fluorescent Indicator Tube
1. Remove the indicator lens assembly by undoing
screwsoto@.
2. Remove the indicator amplifier assembly by
undoing screws O to O.
3. The fluorescent indicator tube is mounted on
the indicator assembly. Remove it by means of
a soldering iron. Take great care when handling
the indicator tube so as to avoid damaging it.
asemblY
Mechanism
lndicatorassembly
o-@
Fig.4-2
new spring is properly seated. The requirements
of the sub-sectionentitled "Pinch roller pressure
adjustments" (Page30) included in the section
"Mechanical adjustments" shall be satisfied.
-è*n"ring
iron
o-o
Removethe mechanismassembly
Sub-head Assembly, Pinch-roller Arm Asembly
and PressureArm
1. Remove the sub-headbase assemblyby undoing
screursOand O and the socket-head hexagonal
Fluorescentindicator
@
bolt.
2. Remove the feed side pinch-roller arm assembly
by loosening the height adjuster (unt).
3. Remove the take-up side pinch-roller arm
assemblyby taking off E-washerQ.
4. Remove the pressure arm by taking off E-washer
O When the pinch pressure spring is replaced
with a new one. take care to ensure that the
o-o
I ndicatoramplifier assemblY
I ndicator lensassemblY
o-()
Fig. 4-3
Removethe fluorescentindicator tube
(nut)
Heishtadjuster
Socket*read
hexagonalbolt
,.'u
,.ry)
ô
E washerQl
o
5
K\
Ewasher
tp^pin"n-'ott*
armassemblv
assemblY
Sub-head
arm
pinch'rollerarm assemblyand pressure
assembly,
Fig. 4-4 Removethe sub-head
5. PARTS LOCATION
F R O N TP A N E LV I E W
G u i d e( R )
R N K€08
Half cover
RNK.777
G u i d e( L )
RN K.566
E s c u l c h e o np a n e l
RAH.285
Front panelassembly
RXX.251
REC VR knob (R) assembl
RAA.225
REC VR knob (L)
assembly RAA-22:
PB VR knob (Rl
a s s e m b l yR A A - 2 2 !
PB VR knob (L)
a s s e m b l yR A A - 2 2
F u n c t i o ns w i t c h
RAC-108
P u s hk n o b ( A l
RAC{91
Tape selector knob assembly
RAA-301
BIASVR Knob
RAA.231
F R O N TV I E W W I T H F R O N TP A N E L R E M O V E D
T a k e r . r pr e e l a s s e m b l y( B )
RX B-190
Supply reelassembly
BXB-189
Reel cap (B)
RN K-815
Power switch
RSA-021
Sub-head base assembly
RXB-255
P u s hs w i t c h ( A )
RSG064
Volume 5k (B) (BIAS)
RCSO20
Volume 20k (B)
RCV464
MIC iack
R KN{44
Headphone jack
RKN046
P u s hs w i t c h ( B l
RSG{68
cT-Fs'E'Cl
TOPVIEWWITH BONNETREMOVED
Power supplY æsembly
RWR{)67
assembly
RWX-359
REC EO assembly
RWX361
Powertransformer
R T T - I 7 5( K U I
RTT-I8s (KCl
@ntrol ass€mbly
RWG-103
lC amp assembly
RWX-360
Pushsrvitch(A)
RSG064
Pushsaritch(Bl
RSG068
Motor
RXMO47
Indicatoramp assembly
RWX328
REARPANELVIEW
Bonnet
RNA€64
ain relief
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7. CIRCUIT DESCRIPTIONS
For details of the circuit of the CT-F950, refer
to the block
diagram on Page 13
and also the
overall schematic diagram on Page 54.
7 . 1 R E C O R D I N GA N D P L A Y B A C KC I R C U I T
PlaybackEqualizerAmplifier
The playback equalizeramplifier is an NFB type
amplifier which uses a low-noise high-gain monolithic IC (AN370).
P l a y b a c kF l a t A m p l i fi e r ( O r o : ,O r o +)
The playback flat amplifier is a single transistor
amplifier possessingflat frequency characteristics.
It is used to amplify the output of the playback
equalizer amplifier. A trap circuit is used at the
input sideto prevententry of the recordingbias.
Buffer Amplif ier (Oros,Oroo)'
The buffer amplifier is an emitter follower type
circuit which is used to take the output of the
Dolby NR amplifier to the LINE OUTPUT
terminals.
rc (PA4001)
The PA4001 was developed by PIONEER as a
system IC for use in tape decks. It contains a
microphone amplifier, headphone amplifier, flat
amplifier and recording amplifier. Its block diagram is shown in Fig. 7-1.
OUT
16
IN
15
14
OUT
13 12
tN
11
67
IN
7-1
.to
OUT
9
8
GND
our (topvtew)
B l o c k d i a g r a mo f PA4001
Headphone Amplifier
The headphone amplifier consists of the headphone amplifier section of the PA4001. This is a
complimentary amplifier having a gain of approxi'
mately 7.4d8. The headphone output is taken
off a resistive voltage divider.
Microphone Amplifier
T h e m i c r o p h o n e a m p l i f i e r c o n s i s t so f t h e m i c r o phone amplifier section of the PA4001. It has a
gain of about 28d8.
7.2 TAPE SELECTOR CIRCUIT
The CT-F950 has been designed to use metal,
CrOz, Fe-Cr and normal tapes. The tape selector
circuit (see Fig. 7-2) is switched to suitable equalizer and bias levels according to the type of tape
employed. This switching, plus the tape indicator
(CrOz/NIETAL) switching is performed by the
TAPE switch Sr:or .
P l a y b a c k E q u a l i z e r S w i t c h i n g C i r c ui t
The playback equalizer may be switched to
either of 2 positions: 70ssec for METAL/
CrOz, Fe-Cr and 120ssec for STD.
lVhen the
TAPE switch Srror is in the IVIETAL position
(or CrOz, or Fe-Cr positions), a bias current flows
from Droe (or Drrr or Drro) to Qror via Rrrz,
resulting in the transistor being turned on. The
Cr r q and Rr r s seriescircuit is thus connected to
t h e p l a y b a c k a m p l i f i e r t o s e t u p t h e 7 0 g s e ce q u a l i z e r a m p l i f i e r . W h e n S r: o r i s s w i t c h e d t o t h e S T D
position, Qror is turned off, thereby reverting to
t h e 1 2 0 1 . r s eecq u a l i z e r a m p l i f i e r .
Recording Bias Generator and Bias Selector Circuit
Metal tapes require a bias current of about
twice the level of the bias required for conventional STD tapes. For this reason the push-pull
generator output is amplified by a bias amplifier
(composed of step-up transformers Lro r
and
Ltoz plus coupling amplifiers Qroo and Qroz)
prior to being applied to the head. The bias
amplifier input may be adjusted by the front
panel BIAS control. Whereas more conventional
bias controls vary the B voltage of the oscillator,
the system employed in the CT-F950 also varies
the erasure current at the same time. Since erasure
efficiency is a particular problem with metal
tapes, the CT-F950 has been designed to also
vary the secondary side of the oscillator transformer.
Bias switching for each type of tape is achieved
through the TAPE switch Srror . Bias level is
changed by first maintaining a constant oscillation
level by fuzo, and then changing the voltage by
inserting resistors in parallel. The parallel connected resistors involved are R:zo and Vfuor for metal
tapes, Rrzz and VRroz for CrOz, and Rrza and
VR:or for Fe-Crand STD.
Equalizer
Circuit
Selector
Recording
The recording equalizer is switched to 4 separate
positions (METAL, CrOz, Fe-Cr, and STD). Tran-
sistors Qror,Q+or, Qeos and Qeoz are tumed on
and off according to the position of the TAPE
switch Srlor, thereby switching the LC resonance
circuit in the recording equalizer, amplifier.
REC HEAD
Tapo solector
sr30r
P.B. EO AMP
Ril5
clt9
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ET A L
Fig.7-2 Tapeselectorcircuit
7.3 LEVEL METER
The level meter circuit is shown in Fig. 7-3. It
consistsbasicallyof 3 ICs (ICaor, ICaozand ICsor)
and 1 microcomputer. Levels are displayed in
digitâl form using a fluorescent indicator tube.
1. The signal obtained from the output terminals of
the headphone amplifier is converted into a IC
voltage by means of a logarithmic compression
amplifier. This DC voltage becomes the reference input for the comparator.
2. The comparative input to the comparator is a
DC voltage obtained by passing the indication
condition of the level meter through a digitaU
analog converter.
3. Accordingly, the comparator continually compares the reference voltage with the indication
condition of the level meter, and sends signals
to the microcomputer so as to maintain the
comparative input (level meter indication condition) equal to the reference input.
The level meter is primarily a peak reading
meter, however it is possible to use it either as a
VU or PEAK HOLD meter by pressing switch
Ssor-r (VU) or Saor-z(PEAK HOLD).
XEAOPHONE
AMP
LEVEL
I|€lER
LOGARITHMIC
coMPRESSTOt{
AMP
saor-2: MElÉR
S€LECTOR
Fig.7-3
Levelmetercircuit
7.4 ELECTRONICCOUNTER
The electronic counter consists of a microcomputer (ICaoa) and a counter type fluorescent
indicator tube (Fig. ?-7). Sensing pulses emitted
from the mechanical assembly undergo rvave
shaping at Qaor to Qsosand then enter the microcomputer (ICaoe). The input pulsesare added and
subtracted in the memory of the computer, and
the resultant numerical value is displayed at the
counter indicator tube.
cT-Fs|5c,
7 . 5 D O L B Y N R P R O C E S S O RC I R C U I T
Recording Mode Operation
1. Input signals are first applied to the MPX filter
where the FM broadcasting station's pilot signal
is employed, and where an 85kHz bias trap is
employed to prevent mis-operation of the Dolby
NR noise reduction system.
2. From the MPX filter, the signals are passed on
6. The clipper produces a time lag in the signal
applied to the voltage-controlled amplifier, and
since it is not capable of responding to sudden
Ievel changes, no uncontrolled signals will be
applied to the adding amplifier.
7. When the level of the signal passed through the
high-pass filter is high, the rectifier output DC
voltage will also be high, and the variable filter
turnover frequency will be increased. The subsignal level will therefore become almost "0", so
to the buffer amplifier whose output is divided
into 2 routes. The main signal is passed directly
to the adding amplifier, while the sub-signal is
passed via the side chain amplifier and clipper
before being recombined with the main signal
in the adding amplifier.
3. Besides being applied to the clipper, the side
chain amplifier output is also passed via the
voltage controlled amplifier and integrating
amplifier back to the side chain amplifier input,
forming a variable filter circuit.
4. In addition to the above, the side chain amplifier
output is further applied to a high-pass filter and
rectifier where it is converted into a DC voltage
for control of the voltage controlled amplifier.
there will
range.
be no contraction of the dynamic
Playback Mode Operation
Although each section of the Dolby NR Processor operates in the same way as during recording
mode, the sub-signal is derived from the output of
And since the adding
the adding amplifier.
amplifier is an inversion amplifier (where output
phase is opposite to input phase), the sub-signal
will be of opposite phase, thereby forming an NFB
loop.
In Dolby NR B noise reduction systems, contraction and expansion occur within a fixed
5. When the level of the signal passed through the
high-pass filter is low, the rectifier output DC
frequency range determined by the variable filter
And, in order to achieve perfectly
circuit.
resulting in a
voltage will be almost "0",
minimum tumover frequency for the variable
filter. The Ievel of the adding amplifier output
will thus be 10dB (above SkHz) higher than the
symmetrical operation, it is necessary to fix a
reference level for the operational point. This is
level", below which no
the so-called "Dolby
contraction and expansion is performed.
level of the main signal, thereby contraction the
dynamic range.
MPX Filter
Adding Amplifier
BufterAmolifier
Sidechain Amplifier
Voltage.control led
Amplif ier
R e c t i fi e r
H i g h p a s sF i l t e r
F i g . 7 - 4 D o l b y N R p r o c e s s ocri r c u i t
7.6 CONTROL
CIRCUIT
PLAY Operation
1.lVhen a cassetteshell is loaded, the cassetteshell
detection switch will go into the SHELL position
and the slack elimination circuit (Described
later) will commence functioning.
When
the PLAY switch 'Sgoais pressedon, the
2.
voltage at Pin 17 of lCsor will become a High
level (Hereafter abbreviated to H level). Current from +Br will flow from the capstanmotor
CM to Qszz. As a result, Qszz will become
conductive, and CM will start to rotate, At the
same time, current from *81 will flow through
Qszr, the reel motor RM, Rssr and Qsrz, ând
hence RM will also start or rotate.
3. The voltage at Pin 15 of lCsor will also become
an H level. Current from fBr will flow through
the pinch solenoid $[,rror, Qsrz 31d Qsrr,
hence SL r r o r will operate and the unit will go
into the PLAY mode.
REC Operation
1. When a cassette shell having erasure prevention
tabs is loaded (The erasure prevention switch
Srros will go into the NO HOLE position), the
PLAY switch Sgos and the REC switch Ssoc
will go on simultaneously. The operation of the
pinch solenoid Srror and the capstan motor
CM is the sameas for "PLAY operation".
2. The voltage on Pin 16 of ICsor becomesH level.
As basecurrent flows from Rsoe,Rtro to Qtos,
Qo og becomes conductive, the bias oscillator
circuit operates and the unit goes into the REC
mode.
When a cassetteshell which does not have erasure
prevention tabs is loaded (Srros goes into the
HOLE position), Pin 5 of ICsor will become
Low level (Hereafter called L level), regardless
of the position of Ssoa, and hence the unit will
go into the REC mode.
FF, REW Operation
1.When the FF switch Ssoz is turned on,Pin22
of ICso r will become H level. Cunent from *Br
will flow through Qszr, the reel motor RM and
Qs r o, and thus RM will start to rotate.
2. Current from *Br will flow through the brake
s o l e n o i dS L r r o u , R s l s a n d Q s r e , h e n c eS L r r o z
will operate and the brake will be removed.
,1E|
3. The REW operation is basically the same as the
FF operation except that the polarity of the
voltage supplied to RM is reversed.
PAUSE Operation
1. As previously explained, when the unit is in
either the PLAY or REC modes, current from
*Br flows into the pinch solenoid SLrror, the
capstan motor CM, the reel motor RM and the
bias oscillator circuit.
2. If now the PAUSE switch is pushed on, Pin 15
of ICsor will become L level. As a result,
Slrror will not operate and RM will notrotate
(Refer to section entitled "PLAY operation").
Hence the PLAY or REC condition will be
temporarily removed.
TIMER START Operation
r PLAY Operation
1. Pressthe TIMER START PLAY switch Saor-s
on, and then put the POWER switch on using
the timer etc. While Carz is chargingup, Pin 4
of ICsor will become L level. and thus the unit
will operate in the same ïyay as if the PLAY
switch S4o3ïyere put on.
2. When the power supply voltage reachesits final
value (after about 4 seconds),Pin 14 of lCsor
will become H level, and the unit will go into
the PLAY mode.
. REC/PLAY Operation
1. Pressthe TIMER START PLAY switch Ssor-e
on, and then put the POWER switch on using
the timer etc. While Car r and Carz are charging
up, Pins 4 and 5 of ICsor will become L level,
and thus the unit will operate in the same ïyay
as if the PLAY switch Ssos and the REC switch
Ssoawere put on simultaneously.
2. In the same u/ay as for PLAY operation, Pin 14
of ICsor becomes H level, whereupon the unit
commencesREC/PLAY operation.
MEMORY STOP Operation
Press the MEMORY STOP switch on, and then
press the REW switch on. When the tape counter
indication reaches "999", the REW operation
will stop.
1. Pressthe MEMORY STOP switch Saor-r on, and
press the REW switch Sgor on. lVhen the tape
counter indication reaches"999", a pulse will be
sent from the microcomputer (ICaoe).
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Fig. 7-5 Controlcircuit
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GT-FS|5O
Current will flow from Ress to Qaor, thus
Qaoz will be turned on, and as a result of the
integral pulse, Pin 11 of ICsor will momentarily
become L level.
l. When Pin 11 of ICsor becomesL level as a result
of the program within the IC, the output will
go into the STOP mode, and thus the unit will
ceaseoperation.
4EMORY PLAY Operation
. Press the MEMORY PLAY switch on, and then
put the REW switch on.
. \[hen the tape counter indication reaches"999",
a pulse will be sent from the microcomputer
gCff.). Current will flow from Rssr to Qaoz,
'ûruË
turning on Qeoz, and as a result of the
integral pulse, Pin 11 of ICsor will momentarily
become L level.
. When Pins g and 10 of lCsor are to L level by
means of the program in the IC, the unit will
momentarily go into the STOP mode and then
commencePLAY.
ounter Repeat
Press the REPEAT (counter) switch on. When
re tape stops during PLAY or REC/PLAY (auto
op), the unit will automatically go into the REW
.ode, and when the tape counter indication
raches"999", it will revert to PLAY.
, Press the REPEAT (COUNTER) switch Seoz-r
on, and set Pins 8 and I of ICsor to the L level.
\ilhen the tape stops during PLAY or REC/
PLAY, Pin 12 of ICsor will momentarily go to
the L level. When Pins 8 and 9 of ICsor âreset
to the L level by means of the program in the
IC, and Pin 12 goes to the L level, the unit will
automatically go into the REW mode.
. When the counter indication becomes "999",
a pulse will be emitted from the microcomputer
(ICaoc). Current will flow from Rass to Qaoz,
resulting in Qeoz being turned on, while Pin 11
of ICsor will momentarily go to the L level as a
result of the integral pulse.
If Pin 11 of lCsor goes to the L level during the
REW operation of the unit, resulting from Pin
12 going to the L level, the unit will go into the
PLAY mode as a result of the program contained
I C s or .
5. Because of the program contained in lCsor,
COUNTER REPEAT is not possible during FF
or REW (Auto stop is possible).
End Repeat
Pressthe REPEAT (END) switch on. If the tape
stops during PLYA or REC/PLAY (auto stop), the
unit will automatically go into the REW mode,
and when the tape has completely rewound, the
unit will once againgo into the PLAY mode.
1. Pressthe REPEAT (END) switch Ssoz-zon, and
set Pins 8 and 9 of ICsor to the L level.
2. For details of the REW operation, refer to paragraph 2 "COUNTER REPEAT".
3. When the tape completely rewinds, Pin 12 of
ICsor will once again momentarily go to the L
level.
Pinch Solenoid Switching Circuit
This circuit is designed to protect the pinch
solenoid from overheating. It operates after the
PLAY switch has been pressed on, by applying a
high voltage (approximately 13V) to the pinch
solenoid for a period of about 0.5 seconds,in order
to increase its attractive force, and then reducing
the voltage to about 6V after the solenoid has
operated(Fig. 7-6).
1. When the PLAY switch Ssos is pressed on,
Qs r r becomes conductive, the pinch solenoid
Sl,rror operates and the unit goes into the
PLAY mode (Refer to section entitled "PLAY
mode").
_a
e
Fig. 7-6
Pinchsolenoidswitchingcircuit
CT.F9
2. Cunent will flow from +B through Rsao,Csoz
and Qsr z. A voltage approximately equal to the
+B voltage (approximately 13V) will be applied
to the pinch solenoidSL r r o r until Qsr z becomes
fully conductive.
3. When Csor becomes fully charged (after an
interval of about 0.5 seconds), Qs r z will be
reduced by Rsar to the minimum value (approximately 6V) necessaryto hold the plunger
in position.
4. If Pin 12 of ICsor goesonce againto the L level
during the REW operation of the unit, resulting
from Pin 12 going to the L level, the unit will
go into the PLAY mode as a result of the program containedin ICsor.
5. Becauseof the program containedin ICsor, END
REPEAT is not possible during FF or REW
(Auto stop is possible).
Auto Stop Circuit
This circuit is used to automatically releasethe
mechanism in the event that the tape stops during
PLAY, REC, FF or REW. It employs a photointerrupter type switch linked to the take-up reel
by means of a belt, in order to detect the running
of the tape (Fig. 7-7).
1. When the tape is running, pulse signals
emitted from the photo-interrupter (TLP
a n d h e n c eQ a o t ,Q a o z Q
, a o r ,Q s o ca n d Q s o r
switch on and off continuously. At the
time, Csor will charge and discharge
While Qsor is turning on and off, the
of point A will be relatively low, and thus
will turn off.
2. When the tape stops running, pulse signals
the photo interrupter lamp will disappear,
thus Qsor will go off. When this h
Csor will charge up. The potential of po
will start to rise, and Qsoz and Qsor wil
turned on. Consequently,Pin 12 of lCsor
become L level, and the unit will go into
STOP mode.
3. When either the POWER switch is
and off. or the PAUSE button is
H level will be applied to the base of Qsor
Dsos and Dsoa and thus the potential at
will not rise. Consequently, the unit will
go into the STOP mode.
+92
a
+83
(5 6v)
c504
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MUÎING CIRCUII
Fig. 7-7
Auto stop circuit
TapeSlackEliminationCircuit
4. \ilhen Qsra is turnedon, currentfrom iBr will
The CT-F950 employs a closed loop capstan to
provide constant speed drive for the tape. If slackness appears in the tape during PLAY, it will be
impossible to obtain the necessaryloop tension,
and thus the normal tape head contact will be lost.
The tape slack elimination circuit is designed to
take up any slack when a cassettetape is loaded,
by causing the supply reel to rotate in the RE\{
direction (Fig. 7-8).
1. When a cassetteshell is loaded, the cassettetape
switch Srroz will go into the SHEllposition.
As a result, current will flow from *Br through
R s o e , Ç s o aa n d Q s z r , a n d t h u s Q s z e w i l l b e
tumed on.
2.When Qsz+ [ggsmes conductive, current will
flow from *Br through Qszc, Dsto Rsce and
Qs r a, and thus Qs r s will become conductive.
Accordingly, current will flow from tBr through
t h e b r a k e s o l e n o i dS L r r o t , R s c s a n d Q s r r , a n d
thus SL r r o r will operate (Brake will be removed).
3. At the same time, current from *Bs will flow
through Qszc, Rseo and Qsra, and as a result
Qsra will be turned on.
f l o w t h r o u g h Q s z o ,R s s s , R s s c a n d Q s r a a n d
hence Qszo will become conductive. When
Qszo and Qszs become conductive, current will
flow from +Br through Qszo,the reel motor RM,
Rssc and Qsra. As a result, RM will rotate in
the reversedirection and take up the slack.
The time required to take up any slack will be
determined by the charging time of Csoa (approximately 0.5 seconds), and the rotational
torque of RM will be determined by the value of
Rssc.
5. Muting when the unit is switched from STOP to
REC is basically the same as that described in
Paragraphs1 to 3. Pin 16 of lCsor will become
H level, and hence current will flow through
Rszz to Qsos. When Qsos becomesconductive,
Qsoo, Qsoz and Qror will be tumed off, and
thus the muting condition will be removed from
the recording amplifier.
+Bl
S I I O 2 T C A S S E T THEA L F D E T E C T O RS w l l C H
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F i 9 .7 - B T a p es l a c ke l i m i n a t i o nc i r c u i t
+B3
(5 6V)
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PAUSE
OPERATE
AUTO
COUNTER REPEAT
P
FF or REw
Rec /
PLAY
/
END REPEAT
PLAYoT"t"rrro,
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DIRECT
Timing Chart 1
NORMAL
ON
BRAKE
SoLENOTO oFF
TAPE
RUl{
RUN
STOp
CAPSTAN
MOTOF
REC
MU T E
O FF
ON
OPERATE
CT-F9SCl
7 . 7 M U T I N GC I R C U I T
Muting When the PowerSwitch is PressedOn and
off
This circuit is designed to eliminate noise (e.g.
click noise) 'vhen the POWER switch is pressed
on or off (Fig. 7-9).
r When Power Switch is PressedOn
1. When the POWER switch is pressed on, the
emitter voltage of Qoor will immediately rise to
approximately 5.6V. Because current does not
flow into Coor, the voltage across its terminals
will be 0V. Consequently, in the Schmitt
trigger comprising Qooz and Qcor, Qeor will be
turned off and Qeor will be turned on. Also,
Qsoe will be tumed off and Qsos will be turned
on, and thus the 5.6V source will produce a
current flow through Dcor into Qroz and Qroe.
As a result, Qroz and Qror will become conductive, thus short circuiting the LINE OUTPUT.
2. Meanwhile, Ceoz and Cers rapidly charge up.
When Cooa chargesup, the base potential of
Qoos will become -6V, and hence Qoor will
be turned off.
Consequently, the voltage across the terminals
Fig. 7-9
of ZDoor will become approximately 6V. Thi
voltage will cause current to flow through Rc r:
and charge up Coor. When the voltage acros
Ceor reaches the reversing level of the mutinl
circuit (Approximately 4 seconds after thr
POWER switch has been pressedon), Qooz wil
turn on and Qeor will tum off. BecauseQeor
will be turned on, and Qeos, Qroz and Qloe
will be turned off, the LINE OUTPUT mutinl
condition will be removed.
r When the Power Swibh is PressedOff
1. When the power switch is pressed off, thr
chargesstored on Coor and Cors will rapidl5
decay. Consequently, the charge on Coor wil
flow through Door and Roor into the base o
Qar c. When Quoe becomes conductive, tht
chargeon Coor will rapidly decay.
2. Consequently, Qeoz will now be turned on, an€
Qooe turned off. Qcoe will be turned off, anc
Qoos, Qroz and Qlor turned on, hence tht
LINE OUTPUT will be muted. After the
POWER switch has been pressedoff, the power
supply for the unit will be charged on Cooz.
M u t i n gc i r c u i t 1
MutingduringFF,REWandSTOP
This circuit is designed to eliminate noise (e.g.
motor noise), during FF, REW or STOP (Fig. ?-10).
l.During FF, REW or STOP, Pin 20 of lCsot
will become H level, and hence basecurrent will
flow into Qsoa.
2. When Qsra becomesconductive,Qsoeand Qsro
lvill also become conductive. Current from
+Br wilt flow through Qsto, Qqoz,Stot-l. Rtzs,
Rlzz, Qroz and Qros. Accordingly, Qeoz and
Qcor will become conductive, and the LINE
OUTPUT will be muted.
At
the same time, current will flow 166 tB3
3.
through Qs r o, Ds r z, Rzal and Qzor' Qzor will
thus become conductive and mute the recording
amplifier.
4. When the MONITOR switch Seor-r is in the
SOURCE position, the LINE OUTPUT will not
muted.
Muting During Changeover from Stop to Play
(or REC)
This circuit is designed to prevent switching
noise when the PLAY or REC switches are
operated(Fig. 7-10).
1. When the unit is in the STOP condition, Qroz,
Qroe and Qzor will be conductive, and hence the
LINE OUTPUT and the recording amplifier will
be muted. Also, Csoo will be charged (Refer to
previous section entitled "Muting when unit is
in STOP condition").
2. When the PLAY switch is pressedon, Pin 20 of
ICsor will become L level, and hence current
will not flow through Qsoa.
3. When Qsoa becomesnon-conductive, the charge
on Cso6 will decayvia Rszg. Duringthe interval
that Csoo is discharging (approximately 1
second),Qsor, Qsro,Qtoz andQroe willbecome
conductive. After about 1 second, the unit will
go into the PLAY condition, and thus switching
noise will be muted.
4. When the unit is in the PLAY condition, current
will flow from *Br through Rsrr, Rszc and
Qsoo, and thus Qsoe and Qsoz will go on.
Consequently, current from *Bs will flow
through Qsoz, Dsoe, P'zet and Qzot, and hence
the recording amplifier will remain muted.
F i g .7 - 1 0 M u t i n gc i r c u i t2
cT-Fs'E'Cl
5. Muting when the unit is switched from STOp
to REC is basically the same as that described
in Paragraphs1 to 3. Pin 16 of ICsor will become H level, and hence current will flow
through Rszz to Qsos. When Qsos becomes
conductive,Qsoo, Qsoz and Qzor will be tumed
off, and thus the muting condition will be removed from the recording amplifier.
BiasMuting Circuit
During recording, the bias signal is sometimes
recorded due to the increasein the relative speed
of the tape and head during the on/off switching
of the PAUSE or releaseof the recording controls.
The recorded bias signal can be heard as a ,,click"
noise when the tape is played back at its fixed
speed; the purpose of this circuit is to suppress
this noise.
1. During REC/PLAY operation (when the REC
and PLAY switches are turned on simultaneously), the No. 16 pin on ICsor reachesH level,and
because the Q:ot receives bias and comes on.
the oscillator circuit operates.
2. When the PAUSE switch is turned on, the No.
19 pin of ICsol reachesH level, and the bias
comes on through the Dsoz - Rszo - Rsro
route to send biascurrent to esoe.
3. With Qsoe on, Qsro is also tumed on, and +B
takes the Dsrz - Rror route to tum on eror.
4. With Qror turned on, Crot and Rror follow a
fixed time constant and turn on eroz by reducing the emmiter voltage.
5. When Qroz comes on, the bias current flows
through the condenser and is grounded. Bias
current is supplied to neither the base of etoe ,
Qsoz nor to the record head.
6. When the PAUSE switch is set to OFF, the
PAUSE operation is halted and recording resumes. However, even if the No. 19 pin on
ICsor reaches L level, since the discharge time
for Cro: (determined by the Cros and R:os
time constants) only turns on eroz, there is
no bias supplied to the record head.
E R Â S EH € A D
REC HÉAO
( R ch I
REC XEAO
(Lch)
R330
,
L304
c32rï
3r9
T
z
c320
R3O4 R3O5
c3Ol
0507 R520
F i g .7 - 1 1 B i a sm u t i n gc i r c u i t
ADJUSTMENTS
8. MECI{ANICAL
(springbalancewith Sfi)g scale)
8.1 PINCH ROLLER PRESSUREADJUSTMENT
1. Put the unit into the PLAY condition'
2. Using a tension gauge (Stick weighing instrument: approximately 5009 full scale), gently
drop the pinch arm (Fig. 8-1).
3. The force necessary to separate the pinch roller
from the capstan shall be between 360 and 4409
at the take'up side, and between 90 and 130g
at the supply side. If outside these values'
reset the Pinch Pressurespring'
4. If Paragraph 3 cannot be satisfied by resetting
the pinch pressure spring, replace it with a new
one.
8.2 TAPE SPEED ADJUSTMENT
1. Connect a frequency counter to the OUTPUT
terminals.
2. Replay the SkHz part of the test tape STD-301'
Adjust the semi-fixed resistor in the motor until
the frequency at the start of the tape falls
within the range 2,995Hl2to 3,010H2 (Fig. 8-2)'
3. When the semi-fixed resistor is turned in the
clockwise direction, the tape speed will increase'
Fig. 8-1
Pinchroller presilre adiustment
and vice-versa.
8.3 TAPE GUIDE ADJUSTMENT
Adjustment Standard
Put the unit into the PLAY mode, and check
that the tape is running normally without curling
around the head guides (Fig. 8-3).
Method of Adiustment
If the tape curls around the head ggides' turn
the height adjuster to the left or right so a's to
obtain a suitable taPe height.
Fig. 8-2
Tape speedadjustment
Postcdiustment Check
Put the unit into the PLAY mode, and check
that the tape does not come into contact with the
head guide.
Tape guide
Height adiuster
Fis.8-3 TaPeguideadiustment
cr-Fg|E'Cl
9. ELECTRICALADJUSTMENTS
Before performing electrical adjustments, check
the following items.
1. Ensure that all mechanical adjustments have
been completed.
2. Adjust the measuringlevel to 0dBv = lV, and
place a 50kO (47kQ to 52kQ ) dummy resistor
acrossthe line output terminals.
3. Perform adjustmentsusing the A-side (the side
with the label) of the specified test tapes.
STD-331A :
STD-341A
STD.601
STD-603
STD-604
4. Obtain
the
For overall replay
For replay adjustments
STD blank tape
Cr,Ozblank tape
METAL blank tape
following
measuring
instruments.
Millivoltmeter, low frequency generator oscillo'
scope, attenuator.
5. Unless otherwise defined, the term "recording
condition" as used in this manual shall mean
the condition when a cassette shell is loaded, and
both the PLAY and REC switches are pressed.
6. Unless otherwise specified, adjustments shall be
performed on both L and R channels.
7. Clean the heads and also remove any residual
magnetism using a head demagnetizer.
8. Always perform adjustments in the specified
sequence. If the sequence is changed, the
performance of the unit may be degraded.
Adjustment Sequence
1. Head azimuth adjustment
2. Playbackequalizeradjustment
3. PlaybackIeveladjustment
4. Level meter OdB adjustment
5. Approximate adjustment of recording cunent
6. Erasurecurrent adjustment
7. Biastrap adjustment
8. Approximate adjustmentof recordingbias
9. Recording equalizer and variable equalizer
adjustments
10. Recording and playback frequency response
adjustment
11. Recordinglevel adjustment
12. Recordingdolby NR adjustment
13. Playbackdolby NR adjustment
14. Output level adjustment
STD-3314
LÉVEL(dB)
o
-20
tOOscc
rOOsoc
5Oscc tOOr.c
sTD.341A
L E V E L{ d 8 )
33 3Hz
| l4kHr
333H2
5Osac
lOta€ lOr?c
JOscc
Fig.9-1
2 5kHi
IotHr
8 r r u 6 3r|t
6Or.c
lO3.c
3Otac
Recordedcontentsof test tape
9.1 HEADAZIMUTHADJUSTMENT
1. Connect the millivoltmeter to the OUTPUT
Adlustment screw
terminals.
2. Turn the OUTPUT level control to the maximum
position, and put the TAPE switch to STD.
3. Replay the -20dB part of the 10kHz test tone
on the STD-341A test tape. Turn the head
azimuth adjustment screw until the output
from both L and R channelsbecomesa maximum
(Fie. e-2).
4. After adjustment, apply lock paint to the adjustment screw.
Screw driver
Fig. 9-2
Headazimuthadjustment
9,2 PLAYBACK EOUALIZERADJUSTMENT
l. Connect an millivoltmeter to ttre OUTPUT
terminals.
2. Set the TAPE switch to STD, tum VRros and
VR roe up to maximum positions, and VRloz
and VRroa to central Positions.
3. Play the 333H2, -20dB portion of the STD341A test tape, and adjust the OUTPUT volume
control to obtain a -20dBv (0.1V) reading in
the millivoltmeter.
4. Next play the 10kHz, -20d8 portion of the
same test tape, and adjust VRror (left channel)
and VRroz (right channel) to obtain a +ldB
level difference from the 333H2 output reading.
5. Then, play back the 14kHz, -20d8 (signal)
and confirm with the mV meter indication
that the output difference is over +0.5d8
when compared with the previously pXayed
333H2 signal. When less than 0.5d8, adjust in
accordance with the flow cbart on page 37.
6. Change the TAPE switch to the METAL position (or CrOz or Fe-Cr positions), and check
that the frequency responsereferenced at 333H2
is within -4.0 t ldB at 10kHz.
9.3 PLAYBACK LEVEL ADJUSTMENT
The playback level must be carefully adjusted
owing to the fact that it will determine the Dolby
NR level.
1. Connect the millivoltmeter to TP terminals
No. 26 (left) and No. 25 (right) on the mother
ass'y (The OUTPUT potentiometer may be set
at any position).
2. Replay the OdB part of the 333H2 test tone on
the STD-341A test tape. Adjust VRror :L-ch.
and VRroq :R-ch. until the respectiveindications
on the millivoltmeter become ldBv (1.12V).
9.4 LEVEL METER OdB ADJUSTMENT
1. Connect millivoltmeters to the TP terminals
No.30 (left) and No.29 (rieht) on the mother
ass'y.
2. Set the MONITOR switch to the SOURCE
position.
3. Apply a 333H2, -10dBv (316mV) signal to the
INPUT terminals, and adjust the INPUT level
-3dBv
controls so that the millivoltmeters read
(700mV).
4. Then immediately adjust VRaor (left) and
VRaoz (right) in the indicator amplifier ass'y
so that the level meters read OdB at this time.
First turn VReol and VRsoz full around counterclockwise, then tum back clockwise and stop
when the OdB segmentlights uP.
5. Also check that the following readings are obtained in the level meters when the input signal
level is changed.
Input Sisnal
333H2, --5dBv (560mV)
333H2, -26dBv ( 50mV)
lC amplifier
02seso
*%,"d
l6E
-
vn,".dE
/
Lro"
,.015
Fig. 9-3
Adiustment Points
Level Meter Reading
+5 t 2dB
-16 r 2dB
GT-FS|5c,
9 . 5 A P P R O X I M A TA
E D J U S T M E NO
TF
R E C O R D I NC
GU R R E N T
9.6 ERASURE
C U R R E N TA D J U S T M E N T
1. Set the TAPE switchto the METAL position
1. Connect millivoltmeters to the TP terminals
No.30 (left) and No.29 (right) in the mother
ass'y.
2. Short circuit the base of Q:o: (mother ass'y)
to ground (circuit board pattern ground).
3. Set the MONITOR switch to SOURCE, and
turn the DOLBY NR switch off. Then apply a
333H2, - 10dBv (316mV) signal to the INPUT
terminals.
4. Start the CT-F950 in recordingmode.
5. Adjust the INPUT level control to obtain
readingsof -3dBv (700mV) in the millivoltmeters.
6. Next connect one millivoltmeter across TP
terminal No.40 (left) and ground (mother trs'y),
and the other acrossTP terminal No.43 (right)
and ground.
7. Set the TAPE switch to the STD position, and
adjust VRzos (left) and VRzoo (right) to obtain readingsof 1.55mV.
8. AIso check that the followng readingsare obtained in the millivoltmeters when the TAPE
switch is changedto the other positions.
and turn the INPUT volume control down to
minimum level. Then connect an millivoltmeter
across the mother ass'y TP terminals Nos.45 and
76.
2. Proceed in recording mode without any input
signal (but with an unrecorded tape being used).
3. Adjust VRror so as to obtain a millivoltmeter
r e a d i n go f 1 6 0 m V .
TAPE Switch Position
AC Millivoltmeter Readins
METAL
CrO:
Fe-Cr
2.14mV
1.84mV
1.45mV
9.7
BIAS TRAP ADJUSTMENT
1 . C o n n e c t m i l l i v o l t m e t e r s a c r o s st h e m o t h e r a s s ' y
TP terminal No.42 (left) and ground, and TP
terminal No.39 (right) and ground.
2. Set the TAPE switch to the METAL position,
and turn the INPUT level control up to maximum level. Proceed in recording mode (with
unrecorded tape) but without any input signal.
3. Adjust Lzos (left) and Lzoa (right) to obtain
m i n i m u m r e a d i n g si n t h e m i l l i v o l t m e t e r s .
4. Then change the MONITOR switch to the
SOURCE position, and connect the mi-llivoltmeters across the mother ass'y TP terminal
No.16 (left) and ground, and TP terminal No.15
(right) and ground. Adjust Lror (left) andLtoz
(right) to again reduce the millivoltmeter readi n g st o m i n i m u m l e v e l .
Note
os carefully oB posThis adjustment
must be performed
sible since the result will influence the lrequency resPonae
during recording and ploybach modes when the DOLBY
NR sutitch is on.
l C a m p l iife r
a s s e m b l y( R c h )
@@
@@
Fig.9-4
Adjustment points
OF
ADJUSTMENT
9.8 APPROXIMATE
R E C O R D I N GB I A S
1. Set the BIAS control to the center click-stop
position, and the TAPE switch to the METAL
position. Then proceed with the CT-F950 in
recording mode.
2. Connect an millivoltmeter across the mother
ass'y TP terminal No.40 (left) and ground, and
another meter acrossTP terminal No.43 (right)
and ground.
3. Adjust VRros (left) and VRsoe (right) so that
the meters read 12mV.
4. Next change the TAPE switch to STD, and
adjust VRror to obtain meter readings of
6mV. Change the switch again to the CrOz
position, and adjust VRroz to obtain meter
readingsof 9.5mV.
5. Then set the MONITOR switch to the SOURCE
position, and apply a 333H2, -10dBv (316mV)
signal to the INPUT terminals.
6. Connect the millivoltmeters to the OUTPUT
terminals, and adjust the INPUT level controls
so that the meters read - 10dBv (316mV).
7. After completing the above adjustments,set the
MONITOR switch to the TAPE position, and
record and play back the 333H2, -10dBv
(316mV) signal onto/from the STD-601 test
tape. Then after first turning VRaos (left) and
VRsoe (right) counterclockwise, turn them back
clockwise and stop at the maximum position.
OUTPUT
LEVEL
M a x i m u mo u t P U t
I ras
Fig.9-5
OutPut level
9 . 9 R E C O R D I N GE O U A L I Z E R A N D
VARIABLE EOUALIZER ADJUSTMENTS
1. Connect millivoltmeters to the mother ass'y TP
terminalsNo.30 (left) and No.29 (right).
2. Short circuit the base of Qror (mother ass'y) to
ground (circuit board Pattern).
3. Set the MONITOR switch to SOURCE, and
apply a 333H2, -10dBv (3LGmV) signal to the
INPUT terminals. Then proceed in recording
mode.
4. Adjust the INPUT level controls to obtain meter
readingsof -BdBv (700mV).
5. Next connect an millivoltmeter to TP terminal
No.5 in the IC amplifier ass'y, and adjust VRzor
and VRzoe to obtain the same output levels
for the 333H2 and 10kHz input signals. (Variable equalizer adjustment).
6. Then set the TAPE switch to the STD position,
and connect millivoltmeters across the mother
ass'y TP terminal No.40 (left) and ground, and
TP terminal No.43 (right) and ground. Switch
the input to 15kHz and obtain the same AC
millivoltmeter readings by employing an attenuator in the input stage. Adjust Lcor (left)
and Lqoz (right) so that the amount of attenuation required is 13.0d8. (STD recording equalizer adjustment).
7. Change the TAPE switch setting to METAL, and
adjust in the same way as described above in
step 6. In this case, adjust Leos and Lcoe so
that the attenuation required will be 16.0d8.
(METAL recording equalizer adjustment).
8. Finally set the TAPE switch to the CrOz and
Fe-Cr positions, the required amount of attenuation being 19.6 f 1.5dB and 12.6 I 1.5 dB respectively.
9.10 RECORDING AND PLAYBACK
FREOUENCY RESPONSEADJUSTMENT
1. Connect millivoltmeters to the OUTPUT terminals.
2. Set the TAPE switch to STD, and the MONITOR switch to SOURCE, and apply a 333H2,
-30dBv (31.6mV) signal to the INPUT terminals. Adjust the INPUT level controls so as to
obtain meter readings of -27d8 (44.6mV).
3. Set the Monitor switch to TAPE, record 333H2,
-30dBv (31.6mV) and 10kHz, -30dBv signals
onto the STD-601 test tape. Play these sections
back again, and adjust VRooc (left) and VRros
(right) so that the output difference between
these two signalsis about OdB at 10kHz.
4. Then, confirm that the record/playback frequency responseof test tape STE-601 is within
the fixed standard range (page4O).
5. Set the tape selector switch to METAL, ild
use the STD-604 test tape as in the previous
instructions. Record the 333H2 and 10kHz
signals and play them back. Then, confirm
that the playback output deviation of the
10kHz signal is within +1 t 1dB of the 333H2
signal'
5. When a certain type of tape does not meet
with the standards specified in section 4, confirm that the adjustments are within the standards of recording and playback frequency
response adjustment with the Dolby NR switch
on, and then adjust VR205 (Lch) and VR206
so that the value in section 3 is within the range
o f - 2 . 5 t 0 . 5 d B( 8 0 0- 7 1 0 m V ) .
the INPUT potentiometer so that the indication
on the millivoltmeter becomesOdBv(1V).
4. Next, set the level of the input signal of
Paragraph2 above,to -50dBv (3.16mV).
5. Put the DOLBY NR switch on. Adjust VRzor
(left) and VRzoz (right) so that the millivoltmeter indication becomes-34dBv (19.9mV).
9.12OUTPUTLEVEL ADJUSTMENT
1. Connect millivoltmeters to the mother ass'y
TP terminals No.26 (L-ch) and No.25 (R-ch),
and tum VRror and VRroe down to minimum
positions.
2. Apply the 333H2 signalto the mother ass'yTP
terminals No.16 (left) and No.15 (right), and
adjust the INPUT level controls so that the
millivoltmetersread - SdBv ( 700mV).
3. Set the OUTPUT level controls to the center
click-stop positions, and connect millivoltmeters
to the OUTPUT terminals. Adjust VRror
(left) and VRroa (right) so as to obtain meter
readingsof -7dBv ( 46mV).
9.14 PLAYBACK DOLBY NR ADJUSTMENT
1. Connect the millivoltmeter to terminals No.25
(left) and No.26 (right) on the mother ass'y.
2. Put VRro: and VRroc in the minimum settings.
3. Apply a lkHz signal to TP terminals No.15
(left) and No. 16 (right) on the mother ass'y.
Adjust the input level so that the millivoltmeter
indication becomes0dBv (1V).
4. Next, apply an input which is 34dB below that
of paragraph3 above.
5. Put the DOLBY NR switch on. Adjust VRroo
: L-ch and VRros : R-ch. so that the indication
on the millivoltmeter becomes-40dBv (1mV).
9 . 1 3 R E C O R D I N GD O L B Y N R A D J U S T M E N T
1. Connect up the millivoltmeter to TP terminals
No.29 (left) and No.30 (right) on the mother
ass'y.
2. Apply a -10dBv (316mV) lkHz signalto the
INPUT terminals.
3. Put the DOLBY NR switch off, and then adjust
r\
U
L.o, L.-
@@
1..
llC amplifier
I a s e m b l y( L c h )
L.-
@@
r'6dô"^"-flI?P'Bie æ
(
/,6i1!,*u,l'""gZr,d,"Y,t^
Fig.9-7
36
Adjustmentpoints
a
CT-F9EiCl
6. If outside the specified standards, refer to
..9.6, ERASURE
CURRENT ADJUSTMENT''
and adjust VR303 so that the value is within
the range of 160 + 20mV.
7. Then, confirm that the record/playback frequency response for metal tape is within the
fixed standard range.
8. Set the tape selector switch to CrOz and
using test tape STD-603 as in the previous
instructions, record and play back the 333H2
and 10kHz signals. Then confirm that the
playback output deviation of the 1OkHz
signal is within O t 1dB of the B3BHz signal.
If outside the specified standards, adjust
vR302.
9. Then, confirm that the record/playback frequency response for test tape STD-609 is
within the fixed standard range (page 40).
10. Set the tape selector switch to Fe-Cr; record
and play back the 333H2 and 10kHz signals
on a SONY DUAD C-60 and confirm that
they are within the fixed standard range
(page40).
11. Set the Dolby switch to ON, and confirm
that the record and playback frequency response for all types of tapes is within the
fixed standard range (page 40).
x when making adjustments, also refer to the
flow chart on page 37.
@@
9 . 1 1R E C O R D I N G
LEVELADJUSTMENT
NOTE:
Since this adjustmentsets the recordingleuel, it must
beperformedaccurately.
1. Set the MONITOR switch to SOURCE, and apply a 333H2, -10dBv (316mV) signal to the
INPUT terminals.
2. Turn the DOLBY NR switch off. and connect
millivoltmeters to the mother ass'y TP terminals
No.30 (left) and No.29 (rieht). Adjust the INPUT level control so that the meters read -3dBv
(710mV).
3. Then set the TAPE switch to the STD position,
and turn the DOLBY NR switch on, and also
change the MONITOR switch to the TAPE
position. Record the 333H2 -10dBv (316mV)
signal onto the STD-601 test tape, and adjust
VRzos (left) and VRzoe (right) so as to obtain
millivoltmeter readings of -2.5dBv (750mV).
during playback.
4. Set the TAPE switch to CrOz, and then to
METAL, and record the 333H2, -10dBv
(316mV) signal onto the STD-603 test tape
and the STD-604 test tape respectively as
described above under step 3. During playback
with both tapes, check tbat millivoltmeter
readings are within -3dBv (710mV) t l.5dB
in the both cases.
@@
t,.,gu;
Fig.9-6
Adjustmentpoints
,r&
cT-Fs|5cl
Playback adjustment flow
chart
A d j u s tt o + 1 d Ba t l o k H z
Adjust to +ldB at lOkHz
( V R r o r ,r o r )
Does the l4kHz
exceed +O.sdB
Connæt C,"r, ,". lsOpF to Nos.
18-19 20-21 on the mother unit
Do Crer, r6r reachlSOPF?
ls the reason that the high range is
exaggeraled during plâVbâck?
(Plavbact response at l4kHz over
+3dBl
ls the reason that the high range is
attenuated during playback?
(Plavback response at l4kHz is
near +O sdB)
Release the Cror. Crez l8OPF
from the mother unit
Adiust (VRror, rorl to +1dB
at lOkHz
Refer to step 8 in flow chart
39
Inspect the azimuth. the head itself and the test taoe.
lkHz
4OHz
lOkH2
lokHz l4lHr
533H2
* UsingSTD-331Aand the STDposition,with
DOLBYNR OFF.
Note:
The frequency characteristics for the R channel shall be
obtained by subtmcting ldB from the ualue indicated
on the meter at 40Hz and 63Hz respectiuely.
4OHr l25Hz
333H2
6.3kHz
l2kHr
{' Using STD-603 and the CrOz position, with
DOLBY NR OFF.
1kH!
?lHz
zloHz
l25Hz
333Hr
ô3lHz
l z lt H r
t Using SONY DUAD C-60 and the Fe-Cr position. with DOLBY NR OFF.
4OHz l25Hz
lOlHz l2hHz
333H2
t Using STD-601 and the STD position, with
DOLBY NR OFF.
llHz
lOkHz
4OHz
125H2 333H2
6.3tHr
lzkHz
* Using SONY DUAD C-60 and the Fe-Cr position. with DOLBY NR ON.
I kHz
4OHz t25Hz
333H2
6.3kHz
l2kHz
Using STD-601 and the STD position, with
DOLBY NR ON.
4OHz
2kHz
l25Hr
333Ht
tOkHz l2lHs
* Using STD-604 and the METAL position, with
DOLBY NR OFF.
lkHz
4OHz l25Hz
333Ht
tOtHr l2kHr
* Using STD-603 and the CrOz position, with
DOLBY NR ON.
4OHr
l25Hz 333Hr
65tHt
63tHr
tzkHr
tzkHr
* Using STD-604and the METAL position,with
DOLBY NR ON.
40
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is
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t F
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10. PACKING
fr<>
PartsList
Key No.
1.
2.
3.
4.
5.
Part No.
D66cription
RRB-106
RHLOl8
Rl{L{31
RHA-l75
RHA-I74
OPeratinginstructlons
Vinyl bag (for operatinginstructionsl
Vinyl bag (for cassettetapedeckl
SidePad R
Side pad L
Key No.
6.
7.
8.
9.
Patt No.
Dæcription
RDEOIO
RHLOl9
REA{21
RHG-282
RHG-281
C o n n e c t i o nc o r d
Vinyl bag (for connection cordl
Head cleaning assemblY
Packing case (for KU typel
Packing case (for KC tYPel
11. EXPLODEDVIEWS
o
11.1 EXTERIOR
Key No.
Part No.
Dccription
RAC-094
M e c h a n i s ma s s e m b l y
P a n e ls r a y ( B )
Power knob
Switch joint-bar (D)
Power switch
Control assembly
Bracket
UL cord clamper (Bl
Half cover (Ml
Function switch knob
1.
2.
J.
4.
q
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
RSA02l
RWG.103
R NK . 7 7 7
RAC-108
RXX.251
Function switch unit
P a n e lh o l d e r
Rubber bush
Front panel assembly
Power knob guide
16.
17.
18
19.
20.
RNK.566
RNK-6OB
RBA.O45
2',1.
22.
23.
24.
25.
REF.Ol4
RBK-132
RXB-169
RAH-285
RNK-731
Steel ball
Spring
Hed cover assembly
Escutcheon panel
26.
27.
24.
29.
30.
RBA.O44
RNK-780
RWR.067
Screw (Al
E s c u t c h e o n( M )
Power supply assembly
Heat sink
Power supply P.C. board
31.
RTT.175
RTT-185
P o w e r t r a n s f o r m e r( K U )
Por,\rertransf ormer ( KCI
Terminal 1P
Strain rel;ef
Foot assembly
Chassis
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
BEC-272
RXA-905
RDG{22
RNA€ô4
REB-223
RAC{g1
Lens
Guide L
Guide R
Screw (B)
N y f o n w a s h e r4 6 x 6 ô x O . 2 t
Escutcheon lens
Botrom plate
Screw M4 x 8
Rear panel
Power cord
Eonnet
Bubber (D)
Switch loint-bar (C)
Switch iointôar (8)
Switch ioint-bar (Al
P u s hk n o b ( A )
Key No,
Parts without part number cannot be aupplûed.
Part No.
Dcrcription
46.
47.
48.
49.
50.
RWX359
RCS-020
Mother assembly
Volume sk-B (BlASl
Shield cover
Mother P.C. board
P u s hs w i t c h ( A l
51.
52.
RSG-068
FlK80t4
(RKBO16l
RWX-360
RKN-046
RKN.O44
lC amp assembly
Headphone iack
MIC iack
60.
RWX-361
RE8.233
RAH.287
RWX.109
RWX-150
REC-250
REC EO assembly
Coner cushion
Half covsr panel
S p a r k k i l l a r( U L l
Spark killar (KC)
Capacitor cover D
61.
62.
63.
64.
65.
RAH.286
RBA-038
RBM{04
R R W - 1l 2
R8A026
F u n c l i o np a n e l
Screw
Wire nut
UL Caution label (A)
Screw
53.
54.
55.
56.
57.
58.
59.
RSG{A4
P u s hs w i t c h ( B l
4Pmounr pinjack
GT-FS'5c'
1O. PACKING
\//
\
-,\
.''
\--'-
PartsList
Key No.
1.
2.
3.
4.
5.
Part No.
Description
RRB-106
RHLOl8
RHLO3l
RHA-l75
RHA-I74
Operatinginstructions
Vinyl bag (for operatinginstructionsl
Vinvl bag (for cassettetapedeckl
SidePad R
SidePad L
Kay No.
6.
7.
8.
9.
Part No.
Desc?iption
RDEO1o
RHLOlg
REAO21
RHG-282
RHG-281
Connection cord
Vinyl bag (for connestion cord)
Head cleaning assembly
Packing case (for KU tYpel
Packing case (for KC tYPel
3
See pagef5
NISX
RT3X6
PS0)
\
\/6i tl
<l
t
-.€'
x6
PSIS
nT3
x l0
n-ffi
r8
lg-q'
z,----30
_RT3X8
pslg'"i-
62 8It4x I
p/^/
Oi=--:-
3XE
rwroxo.tt
RÏ3X6
35
=a
RÏ3X8
34
h
1 1 . 3 P A N E LS T A Y
Key No.
t.
2.
3.
4.
5.
Pan No.
Description
RWX-328
Indicator amp assembly
P . C .h o l d e r
Switch(E)
Switch (F)
RSG.066
RSG-067
I n d i c a t o r P . C .a s s e m b l y
Shield cover
Holder(M)
Holder(C)
b.
7.
8.
I
10
11.
12.
13.
14.
15.
4A
c
LD8242
F I P5 D 8
RAC-O93
RAA-223
RAA.225
Indicalor unit
F l u o r e s c e n ti n d i c a t o r t u b e
F l u o r e s c e n ti n d i c a t o r t u b e
I n d i c a t o r P . C .b o a r d
P u s hk n o b ( C )
REC VB knob (L) assembly
REC VR knob (R) assembly
Key No.
Partswithout part number cannot be supplied
Part No.
Description
16.
17.
18.
19.
20
R ED . 1 4 5
RXX.252
Volume mask
Indicator lensassembly
Indicator lens
Indicator panel (M)
21
22.
23
24
25.
RAA.231
RED-O47
RAA.3O1
RAA-227
RAA-229
BIAS VR knob
Switch mask
T a p e s e l e c t o rk n o b a s s e m b l y
PB VR knob (L) assembly
PB VR knob (R) æsembly
26.
27.
28.
29
30.
31
RE D - 15 1
Volume mask
P a n e ls t a y ( M )
Volume unil
Shield cover (tapeselector)
S h i e l dc o v e r ( M )
Meter lens
T a p e s e l e c l o ra s s e m b l y
GT-FS|E'Cl
o Parte utithout part number cannot be supplied,
Parts Lirt
Key No,
Part No.
Oescription
Description
RBH-511
RSF-022
Arm assembly
Arm
Arm
Spring
Microswitch
51.
52.
53.
54.
55.
Spacer
Microswitch (B)
Switch bracket
Detector arm
Half holder
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
RXB.O55
R8K-107
66.
67.
68.
/ 69.
70.
REB-317
RXB-190
RXA-998
REB.272
TU belt
T a k e - u p r e e l a s s e m b l y( B )
Take-up pulley assembly
S e n s i n gb e l t
Arm assembly
R8H-502
RXB-144
RNK.561
R 8H.498
RNK.562
Spring
ldler arm full assembly
ldler
Spring
Spring holder
't.
2.
3.
4.
5.
Key No.
Part No.
6.
7.
L
9.
10.
REC-278
RSF-024
11.
12.
t3.
14.
15.
RBH-534
RBH-563
Spring
Spring
Brake plate
REB.187
RBK.119
Brake shoe
Head base holder
16.
'17.
RB F - 0 1
3
18.
19.
2É:--
REB.153
RNK-348
RBH.374
S t e e l b a lI
Head base assembly
Stopper
Tape guide
Spring
RN K-556
/
RBH.524
RBH.506
RBH.557
Half detector arm assembly
spring
Spring
Solenoid lever
Spring
Terminal 4P
6P plug
RE B - 2 7 0
RNK-815
RXB.189
Screw
S o l e n o i d c h a s s i sa s s e m b l y
C a p s t a nb e l t
Flywheel assembly
Spring
Brake operation lever
Reel cap (Bl
S u p p l y r e e l a s s e m b l y( B )
21.
RNK.535
22.
2-
RXB-OOS
24.
25.
R8 H . 5 1 6
Spring
Arm (A)
71.
72.
73.
74.
75.
26.
27.
28.
29.
30.
RBH.373
RXB-255_--'-
Spring
Socket-head screw M2.6 x 5 Ni
Sub-head base assembly
Terminal 3d
Cord clamper
76.
77.
78.
79.
80.
31.
32.
33.
RNK-7O3
RLA.994
RLA.993
R BF.O37
RX8-093
Head cord cover
P i n c h - r o l l e ra r m s h a f t ( L )
P i n c h - r o l l e ra r m s h a f t ( R )
Washer
Bearing assembly
81.
42.
83.
84.
85.
RXM.O47
RBH-5æ
RXP.O62
Take up motor
S e n s i n gh o l d e r
S e n s i n gu n i t
Spring
Solenoid (Al
RXB.O58
RE8 . 3 1 4
Washer 3C x 6O x 0.5t
Supply pulley assembly
Sub belt
T e r m i n a l( G N D I
REB.297
Lamp holder
86.
87.
88.
89.
90.
RKPOrt4
RBH-5O7
WO3B
RNF.527
RBH.5O5
Connector (1 3pl
Spring
Diode
Spacer
Spring
RELO72
RX8-063
RXMOSO
Lamp (B)
Motor pulley Assembly
Motor
Chassis
UL cord clamper (Dl
91.
92.
93.
REB.194
Rubber
Frictionfelt
UL cord clamper (Bl
u.
35.
36.
3t.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
50.
RNK.534
RBH.5O3
Adjuster
P i n c h - r o l l e ra r m a s s e m b l y
Half holder bracket L assembly
Half holder arm
Spring
Half holder bracket R assembly
Mechanism holder
ldler arm æsembly
W a s h e r2 . 2 @x 5 @ x O . S t
RXP.Os6
RX8.064
Subchassis assembly
Solenoid {B)
Motor pulley (B) assembly
12. SCHEMATICDIAGRAMSP.C. BOARD PATTERNS
AND PARTSLIST
12.1 MISCELLANEOUS
PARTSLIST
NOTE:
c
When ordering reststors, first conuert resistance ualues into code form as shown in
the following exomples.
Ex. I When there are 2 effectiue digik (any digit apart from 0), such os 560 ohm
and 47h ohm (tolerance is shown by J = 5V",and K = IOVo).
56On-56xlot-561
... RDt/tPSE@IB"I
47hsr-47xIO3-473
... RDTAPS@AtsJ
0.5a-0R5
...
.. RN2H toEEK
Ia-OIO
...
.. ASIPTOEEDK
Ex. 2
When there are 3 effectiue digits (such as in high precision metat fitm
resistors).
5.62ha
562 x I0'
5621 . .
.RNYTS^R
6@@û F
ASSEMBLIES
Part No.
RWX-359
RWX328
RWR067
RWX360
RWG.103
OTHERS
PartNo.
Description
Mother assembly
Indicator âmplif ier assembly
Power supply assembly
Integrated amplif ier assembly
Control assembly
swtTcHEs
Part No.
Symbo! & D.sciiptaon
RSAO2l
s001
Povrær
switch
lcr-F950/KC,KUI
RSFO24
sl 102
RSFO22
sl 103
MicroswitchB
(CASSETTEHALF
DETECTORI
Microswitch
( E R A S EP R E V E N T
DETECTOR)
TRANSFORMER
PartNo.
Symbol & Dccription
RTT.I75
T001
Ponær transformer
RTT.185
T001
Power transformer
(cr-F950/KUl
(cr-F950/KCl
SEMICONDUCTORS
Pen No.
S1ymbol& Decription
D l 1 0 1 ,D l 1 0 2 D i o d e
Symbol & Dæription
RWX-109
cR001
RWX-150
cR001
RXPO62
sLl 101
RXP-056
sLl 102
RÊL472
PLl101
Motor
Take.upmotor
Powercord
Sparkkiller
(cT-Fg50/KUl
Sparkkiller
{cT-F950/KCl
SolenoidA
(PINCHSOL.)
SolenoidB
(BRAKESOL.}
Lamp B (CASSETTELAMPI
j
l^d'cot'o. t'thur
g
1Èû ,, ,û
I
F.r
I
is"
.colr(.r!r
1
.ovli.!c'
j
v.rr
5?Or
s?Ot
S.Ol
rlPur
s9or
s90?
s90l
s9oa
s90!
rr' 1S2473
.c,!v l'r'Lcr
-
cùrrrr
q'e-rrr
rar25C2O6O.QoR
!i1?"
q.rr 2SCIT4OLD RorS
qr,-rrr 25D646 ô.
o,,o,,r,o2 WO3E
rro
I iyl
I
I
I
I
I
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àv, ri.
!n ôr,r.
c<,u.....<u,,
!ric -trq
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S O U F C É- t a p f
5906
i€t
Fa
PCiY
iEc
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PIUS€
siloz
ca5s6rtt
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on
oi
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ot
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ofF
oaa
xÂLr ælEcroF
roLf -rc
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to xoLf - xoLE
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rtYÂL -SrO - CrOr - r. q
.àat..t,
,t.
.-tcà
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rnr Amorr
round on !o6.
ôd,@r.!
compoô.nr p6il!
rn. 'heorro^c. ol rh. !ol.ty
tocror ot tha Do.l
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r treÉrr
sloP - PL^Y- COUd€l - EiO -OFf
courltR
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fâ tdAttt^â
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ro ,irrd...nr!
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rOtrlOF
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sto?.6-
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soor POùtr Oi - Qll
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LJ:
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ry I
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d.!,ehofion
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63
?SCl74OLl -R dS
t ?9CaZC - Ro.3
tS2t 7J
-=-Y-r
I
cT-Fs|5c'
Appearance
of Transistorsand lCs
PA4005
lr PD40 5OC
2SA733A
B
PD4004
2SA934
2SC2060
B
2SC828
25C1327
pPC324C
2 S C 17 4 0 1 N
TCg121P
jtTa
1-l;
JI
'1
a
2SD686
TA7318P
25D837
AN37O
E
s.o, ralt.s.rÉcto./
?'r!. s'.ir
vi!o,,ao2
Lrvrr r.ÎÉ..oJ
_________-+_
|
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r.:?::,1_@-i
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lt,5
H
/
\
|
sro ra{
icr.or
vr!o!
v.!o2
a'ri
crol rrta lrri
.c,.o.a
t.tt
.rtl!
.cr'o.a
a[s
- H E A O t l-
ffi--
o $ ' s ! . 5 0 . 2 S C l 7 4 O L N - Ro r S
o!o.2SA733A-PtQ
s!o2 Éro.Y
. frrt.r/
.3i1'!iJ[*'
o.'!è.22
]s2473
:;):"
T
I
GT-F9Eict
l
DIAGRAM
12.3SCHEMATIC
)
L
!31
Lr* @T
lLcn,
v.o5 06
P s @ ô t L a v fL À o r
te2 olr
YrÈr.roz
EqurLrza. ror
cez .5'
viol, rq
rt LrvaL ôJ r
C92 llt
2SCl?eOLil-R
T
t !'
tcro!,'e.2or.2o2
PA4OOs
rfte
22r
,@r
":.:."$i3i.,"..
ce?,ofl
^",
pÂ4OOt
L 20!
(,op .ær: flh
.;;.,
ih
,
O
T
P A
HEÂD
o
ISrzsu-Po,
1 0 6 0 , , 6 0Or2 Z G2 A
tolol3z 24o
*o-. wz-n-c r*.gl-25o
rDæ7BZ-l1o
1066O2Z16ÀûwZ'056
"l3iit s
oso< 2gO2
.r2' a2,
'
}|o'o'
r A
r:
a'9
t
A ræ'
"o.t"
r"..s
o & , , 6 , o2 9 0 2 3 4 ' O o t Y
q6€..or,.06.60!2SCtTaOLN'RorS
e.o,60. zsA7!54'Pot Q qer 234954-Q orR
0602,606 6o7
wo3B
dS
cT-Fs|E'Cl
Appearanceof Transistorsand lCs
PA4005
2SA733A
llPD4O5OC
PD4004
2SA934
2SC2060
--Lot
No
2SC828
2 S C 13 2 7
pPC324C
2 S C 17 4 0 1 N
TC9121P
s
2SD686
2SD837
TA7318P
AN37O
.,x
r-l
4
-r
MECHANtSt
A..'y
:Ëfo '*%
1..^"
I
,1.
lî
ê-ô
+,I
-------t
,\
II
|r49
U
J.
'-----(9
lEà^*-l
i "-:-'"l-
I
rAPE SELEClOR A.i'y
L]"'*:_i
52
DIAGRAM
12.2CONNECTION
FUNCTION SWITCH attrY
t
_l
tNOICATOR A..'Y
lNOlcAloR AMP At.'Y
RWX - 328
COilTROL A!r'y
RWG- ro3
H
H
H
H
H
POr{ER SJPPLY A$',
RWR -067
cT-Fs'5cl
.5 MOTHERASSEMBLY(RWX.359)
rts List
;SEMBLIES
t No.
Symbol & Description
RWX-360
RWX-361
I n t e g r a t e da m p li l i e r a s s e m b l y
REC EO assembly
,ITCHES
Symbol & Drccription
I No.
RSG068
S201, 5203
RSG064
s401
P u s hs w i t c h ( O O L B Y N R
INPUT}
P u s hs w ; t c h ( M O N I T O R )
)tLs
1 No.
.
Symbol & Ebscription
RTFO58
RTF{33
RTFO55
RTFO4O
RTD-018
. RTF{57
T64001
Ll Ol , Ll 02
L2O1, L2O2
L2O3, L2O4
L205, L206
L301, L302
Trapcoil
Trap corl
Trap coil
MPX f ilter brock
Matching transformer
L303, L304
T301
Line coil
O S Cc o i l
;.:t\PACITORS
t rt No.
Symbol & D..cription
C E A N L l O O P2 5
c E A 1 0 1 P2 5
c E A 1 0 1 P1 6
c E A 1 0 1 P1 0
c E A 4 7 0 P3 5
c 1 0 3 ,c 1 0 4
c l 1 5 , C 11 6 , C 3 1 4 ,C 3 1 5 ,C 3 2 0 ,C 3 2 1
c303
cl05, c106
c328
c E A 4 7 0 P1 6
c E A 2 2 0 P1 0
c E A 1 0 0 P3 5
C E A4 R 7 P3 5
c E A 0 1 0 P5 0
c1 51, Cl 52, C227,C228
c125, C126
c127, C128,C133, Cl 34, C137, Cl 38,
c159, C160,C203-C206,C209,C210,
c311,C312
c 1 4 s ,c l 4 6 , C 2 2 1 , C 2 2 2
c 1 1 7 ,C 1 1 8 C
, 1 s 5 c, 1 5 6 ,C 3 0 5
c E A 0 1 0 M5 0
CEA R47P50
CEA R33M 50
cEA 220P35
c E A 3 3 0 P1 6
c 1 4 1, C 14 2 , C 2 1 3 ,C 2 1 4
c121, C122
c 1 3 9 ,C l 4 0 , C 2 1 1 , C 2 1 2
c 1 1 1 ,C 1 1 2
c304
c E A 1 0 0 P1 6
C E A4 R 7 M 2 5 N P
coMA 104K 50
c o M A 3 3 3 K5 0
coMA 223K 50
c31 7, C318, C229, C230-C232
c143, C144,C215,C216
c328
c309
c 1 1 9 ,C 1 2 0
coMA
coMA
coMA
coMA
coMA
1 8 3 K5 0
153K 50
1 2 3 K5 0
r03K 50
682K 50
cl49, C150,C219,C220
c307
c135, C136,C207,C208
c302, c323, C324
c 3 10
Symbol & Dorcription
Part No.
coMA
coMA
coMA
coMA
coMA
8 2 2 K5 0
4 7 2 K5 0
3 3 2 K5 0
2 2 2 K5 0
1 0 2 K5 0
c o M A 1 5 2 K5 0
RCE€23
RCE€O8
RCE-025
c c o s L 1 0 1 K5 0
c 1 1 3 ,C 11 4
c306, c308
c225,C226
c 1 2 9 ,C 1 3 0 ,C 1 4 7 ,C 1 4 8 ,C 2 1 7 ,C 2 1 8
c 3 0 r , c 1 6 5 .C 1 6 6
c 1 6 3 ,C 1 6 4
c131C
. 132
c325, C326
c 1 6 1 ,C 1 6 2
c109.c110
C K D Y B6 8 1K 5 0
c 1 0 7 ,c 1 0 8
C K D Y B4 7 1 K5 0
c 1 5 3 ,C 1 5 4 ,C 2 2 3 , C 2 2 4
cKoYF 473250
c201 . c202. c327
C K D Y F 1 0 3 25 0
c 3 1 3 ,C 3 1 6 ,C 3 1 9 ,C 3 2 2
C K D Y F1 0 8 2 5 0
c 1s 7 . c r 5 8
Note: W'henordering reslsfors,conuert the
resistanceualue into code form. and
RESISTORS
then rewrite the part no. as before
Part No.
Symbol& Cbscription
c92-857
c92-O51
c92ry7
c92402
c81426
V R l 0 l - V R 1 0 4 S e m i -i xf e d
22K-B
vRl 05, VB 106, V R201,VR202
S e m i -i xf e d
4R7K-B
V R 1 0 7 .V R 1 0 8 S e m i - f i x e d 1 0 0 K - B
V R 2 0 3 ,V R 2 0 4 S e m i J i x e d 3 R 3 K - B
V B 2 O 5V
, R 2 0 6 ,V R 3 O 4V
, R3O5
Semi-fixed
33K-8
RCP052
RCPO49
RCP{48
RCS-O20
VR3Ol
VR302
VR303
VR306
RD%PMoooJ
R 1 0 1 - R 1 3 4R, 1 3 7 - R 1 8 4R, 2 0 1- R 2 6 4 ,
R30l-R317, R319,R321,R322, R324,
R 3 2 5 ,R 3 2 9 ,R 3 3 2
R135.8136
R331
R320,R326-R328.R330
R D % P F2 2 1 J
ROY.PF122J
RSIPFOooJ
Semi-fixed
Semi-fixed
Semi-fixed
Volume5K-B
4.7K-8
330-8
22O-B
(8lAS)
SEMICONDUCTORS
Part No.
Symbol & Drccription
AN370
PA4005
l c 1 0 1 ,t c 1 0 2
r c 1 0 3r, c 10 4 ,r c 2 0 1
, rc202
2 S C 17 4 0 L N
2SC1740LN
{2SC1327)
2SC1740LN
{25C828}
2SC2060-O
0 1 0 1 ,0 1 0 2 ,0 1 0 7 - 01 0 , 0 2 0 1
,a202
01030106
152473-T
0 1 0 1 ,D l 0 2 , D 3 0 1 - 0 3 0 4
0 ,3 0 6 - 0 3 1 1
0301,0302
03030307
OTHERS
Pan No.
RKBOl4
(RKBO16)
RKNO44
RKN{)46
R8F042
RBF041
Symbol & Dæcription
4P mount pinjack
MIC jack
Headphone jack
Ceramic tube
Ceramic tube
12.4 FUNCTIONSWITCHASSEMBLY
.
coxr{EcloR
soctEÎ
tù
uzct
I
À
'
J
c
G
D
f\
IJ
o
0
F
È
DDD
o
t
o
L E D g O 5 :T L R 2 0 6
L E D 9 0 -r 9 0 4 : T L G 2 0 6
CONTROLAss'y
RWG.103
[[[[[[[[[0
S$l-s6 RsG{63
\\
{ \'flÉ
Y\
\
\?.,
\\
t'f6206
PartsList
OTHERS
SWITCHES
Part No,
RSG-063
Pert No,
S901-5906
Function switch
SEMICONDUCTORS
Part No.
TLG 206
TLR 206
-LED9O4
LEDgO1
LEDg)s
RKPO42
RNK.733
Connectorsocketassemblvl12Pl
LED holder
CT-F9
12
3
MotherAssembty
(RWX-35il
r'
otor, r02
Z s C r T a O L t - di S
OrO!,ro.
æCrTaqN-â d S
o r ? s c r ! ? 7 - Td u
rc'o, ro2
rcro!. rq, 2or, æ?
OQr, O?. Fr-S.,
!æ!rl
Pr
s1
a
pa
sl
Pa
S ? O r -| - 2
S?O!r- t
s@-r - !
59
nlY
grlot
rl
Il*c
eo rne
I a..'t
I nwx-sl
i
I
O3o5 - lo5
- o
2SC260
@r
CT-F9
v
Mother Assembly(RWX-359)
r
oro5, toa
d 5
?scr?a4t-R
cr ?Sçr5?7-1 r U
[-ï-'l
rcror,ro?
rcr0!, rq, 2or,&
ær, p2, p'-æ., ptrl
s1
Pr
sl
P!
59
gtoT- ttg
2SrTaOLt-Rd
S
i*..o^,"
s10
l^..t
I iwx-sl
i
C to Z
II
Eir
a æ€, ,o7
2 5 C 2 0 6 -0Q
{LrtrE-!!91
l3Ë,PE'--".'
12.8 INDICATORASSEMBLY
L E O 7 0 r - 7 ! 4 P G 5 5 3 tK X
t
ns
o
È
N
E
LEI
so
lt/2vl
sl
GI
s2
s3
G2
TER
F
S.l
07Ol:2SA733A-PorO
o3
s8
s7 r
N
c43
s6
s3P
t7
r6
r5
t4
G5
s9
r3
t2
tl
6
7
a
5
4
3
2
I
Parts List
SEMICONDUCTORS
CAPACITOR
Part No.
cEA 100P35
c701
N o t e . When ordering resistors, conuert the
resistance ualue into code form, ond
then rewrite the part no. as before
RESISTORS
Part No.
RD%pMtrtrEJ
RD%PF122J
RS%PFtroo J
R 7 0 1 - R 7 1 6 ,R 7 1 8 , R 7 1 9 , R 7 2 1 , R 7 2 2 ,
R724,R725
R727-R7æ
R717.R7?0.R723,R726
Part No,
2SA733A
152473
P G 5 5 3K
1X
Symbol & Ocrcription
o701
D 7 0 1D
, 702
-LED704
LEO701
OTHERS
Part No.
Lo8242
FI P 5 D 8
RDOO0l
Symbol & Dcrcriptbn
V 7 0 l F l u o r e s c e n ti n d i c a t o r t u b e ( L E V E L )
V 7 0 2 F l u o r e s c e n ti n d i c a l o r l u b e
(COUNTERI
Cord (18P)
12.6 VOLUMEASSEMBLY
Mother A$'y, No.
MotherAs'y, No. 22
MotherAss'y,No. 24
Mothor A$'y, No.
Mother Ass'y, No.
Mother Ass'y, No,
PartsList
Part No.
RCVO56
Symbol & Irgctiption
VRlæ1
V o l u m eæ k ( A l ( l N P U T l
12.7 SENSINGASSEMBLY
'lndicatorAmp
Ass'y,No, 3
3
.. f+i;
,' -.-tsfl
-+
Amp
Ass'y,No. 2
Ass'y, No. 1
PansList
Part No.
TLP 5O7A
Photo interrupter
3
T a p e S e l e c t o rA s s ' y , N o . 1 2
T a p e S e l e c t o rA s s ' y , N o . 8
Tape Selector Ass'y, No. 7 .--=T a p e S e l e c t o rA s s ' Y , N o . t 0 - - - = ,
Control Ass'y, No. 7 -------t
rt
io'
i sloP : o.7Y
,*t,ol
t
Il llr
a
II
rir rlr
I
r1
?l
it
il
,
?1t
rit Ill
rl
56
59
62
*
? ;1*ëi
Control Ass'y, No. 16
/ €q lrt
Rrî 36
'Ieq!fi,
89
)" "
3r
I n d i c a t o rA m p A s s ' y , N o . 6
7t
æ,31
o_o
Indicator Amp Ass'y, No. 7
Lrm
PowerSupply Ass'y, No. 14
P o r a æS
r upply Ass'y No. 8
3a
35
5l5e5aE5
o
os
62t
ffi
o
')).
'
T a p e S e l e c t o rA s s ' y , N o . 1 3
'o....-
{tr S
::i
t\
Ig
/ REC
oÇroe
I'
ù
1
>
RWX-360
1t
rl
I tl
'!Ê.
lË
I
1qa
ls
I
RWX-3ô0
Indicator Ass'y, No. 7
C o n t r o l A s s ' y ,N o . 1 2
Indicator Ass'y No. 6
1:i
i?t 'n
r"t
tal
3
Volume Ass'y, No. 4
oo
lo
?29
a
i
Volume Ass'y, No. 2
Volume Ass'y, No, 5
rrl
o s39
ô ry@
3kr
À
lti
?, hl
iif | li'l
Tape Selector Ass'y, No. 5
Tape Selector Ass'y, No 1
T a p e S e l e c t o rA s s ' y , N o . 2
. _l^
32
GT-FS|EiCl
4
Bch
I nh
PowerSupply Ass'y, No. I
, Ææ,#.iiîî *sr
.,,*
l"tqr"F.'Ë_
llflE:l/\KH;Ffj*:.r-
à'di
PvTrù
"!6fffi1
XÏ
t*i,,riil.,"
,si.^l.æ
i:*ÈLl,*-i'*'
' : G,oâ4*,*fIY"u|#,Ëe4î"|s"{H.-=-*u
â"o)'i1+l'su
tf-ta\f
f \\
v5o
VrT"
.ot,Ë&
i:"_'" r*-U',i
i Tii -iffii
ffi--
*
{l-'o-,1*'"'
Îol:.1-t't9'"j:':
- rP*L-'g:;:-.li;,
za.
,,. 2[
...l r 2?r
...1r
-*î- ir6 r.
o I I r , -' 6 -o _,::'o:
ê>
__;-'lll00??lâ...,Hcr.6i!rtlT
-'l
o
I
ewD
"saral
i
-;x;
q
I r loo??
ï
er"*. l"ur
c,É+
c\E,
"+r"+frD/r5
a â 4o0,-x
ffir,roo,r_1^!,ijl
"J"iË"'-
I;1i' I:;i t'ài .ftqF -r*;:I
t I
J-
I
II
|
l
s. c z
59*é;oif
?
I
*lml
F'|Èt t
I n t e g r a t e dC i r c u i t A m P A s s ' Y ,
No.12
Integrated Circuit AmP Ass'Y,
No.13
I n æ g r a t e dC i r c u i t A m p A s s ' Y ,
No.12
I n t e g r a t e dC i r c u i t A m p A s s ' y ,
No. 13
I 0Fl
Rch
PB HEAD
T a p e S e l e c t o r A s s ' Y ,N o . 4
Lch
T a p e S e l e c t o r A s s ' Y ,N o ' 3
VolumeAss'Y,No l
a':
--+=-
VolumeAss'Y,No.6
VolumeAss'Y,No.3
-:!l=-
4
6P
cT-Fs|5
12.9 INDICATOR
A M P L I F I E RA S S E M B L Y( R W X - 3 2 8 }
D
@
o
E
I
I
@
o
o
o
]
o.
I
o
T;,1
o
@
ii
,o
/ @
o
@
{:rTïf T:'T--J-,I
"'7
tc80t:TA73t8P
lc8o2:vPc324c
lc8o3:!PD4o5oc
lc8o4:PD4OO4
sEol-l-3r METERFUNcrroN(aVERAGE,PEAXHOLD,pEAK)
sSol-4-6:TtMER REc/pLAy(oFF, REc/pLAy,pLAyr
S802-l-5:MEMORYA REPEAT(oFF,ENOREPEAT,COUNTERREPEAT,MEMORypLA
S 8 O 2 - 6 : C O U N T E RR E S E T
\lnvt4
-l
o
,8
t7
t2
l6
,l
r5
to
t4
9
I
r3
t2
ç7
tl
3e
to
9
q5
4
I
3
2
5
4
3
2
INOICATOR
Arri
RWX- 327
ô
t
+
.A
I
I
o 8ot, 8o2 , 8o4 - 8O7
2 SCI74OLN- Ror S
O 8 O 3!
2SA733A-Por Q
I
Tape Selector Ass'y, No. 11
Porrrær
Supply Ass'y,No. 10
R?13
68r 6Er(
lndicator Amp Ass'y, No. 8
---99
G6 $
oo
INDICATOR AMP Ass'y
Mother Ass'y No.
Control Ass'y No. 12 --{+-_-{}-Mother
Mother As'y, No. 27
D
Ass'y No.32
o
cT-Fs|5Cl
4
ctol
.9
,I
,:,,
izoeRrosRlo+
]OK6ôK6EK
1T1
{tr
f
Itl
tl
___ __J
,,
I
h,t
urED,io3
( DOLBY)
*Ëfir-,il,
S^t
rl lÉDzoq
I
+---------------o
(AUTO)
1t
r:- J--G6 - q z- - ;tI'
oooooooooooooooo
I
iStSZ53s4s5s6F
L----
+
I n d i c a t o r A m P A s s ' Y ,N o . 9
v 7 o ?-F-l P 5 D -8
sz-
GT-F9E
PartsList of IndicatorAmplifierAssembly(RWX-328)
AND COIL
SWITCHES
OTHER
Part No.
Part No.
s801
s802
RSG{)67
RSG-066
R T D € 15
L801
Switch F
Switch E
O s c i l l a t i o nc o i l
Part No.
Symbol & Dercription
c E A 1 0 0 P1 6
cEA 100P35
c E A 2 2 0 P1 0
c E A 0 1 0 P5 0
coMA 273K 50
c801, c802
c806
c 8 11 , C 8 12
c803, c807, c808
c804, c80s
coMA 393K 50
coMA 472K 50
c c D s l 1 8 1K 5 0
c813
c810
c 8 15 , C 8 1 6
Part No.
Connector 3P
R KP.()46
SEMICONDUCTORS
Part No.
CAPACITORS
RESISTORS
Symbol & Deccription
Symbol & Drscription
TA7318P
uPC324C
sPD4050C
PD4004
rc801
rc802
rc803
tc804
2SC1740LN
0801,0802,0804-0807
2SA733A
o803
1S2473
0 8 0 1 - D 8 1 ,O 8 1 3 - D 8 2 2
N o t e : When ordcring resistors, conuert the
resistdnce ualue into code form, ond
then rewrite the part no. as before.
Symbol& Description
RCPO39
R D P St r O D J
R D % P F5 6 1 J
V R 8 0 1 ,V R 8 0 2
S e m i -i xf e d3 . 3 K ( B )
R801,R802,R804-R850,R852-R860
R803
(RWX.36O}
12.10 INTEGRATED
A M P L I F I E RA S S E M B L Y
Note:
Parts List
CAPACITORS
Pert No.
71
RESISTORS
Symbol& Dercription
c E A 1 0 0 P1 6
cEA 221P25
c E A 1 0 1 P2 5
c E A 4 7 0 P1 6
c E A 3 3 0 P1 6
c 10 0 1 ,c 10 0 7 ,c 10 2 1
c1018
c1021
cl006
c l 0 11
cEA 100P25
C E A4 R 7 P3 5
c E A 0 1 0 P5 0
cssA R33M 2s
cEA 100P35
cl010
c1009
c1013
c1014
c1015
C E A N L1 O O P
16
C E A N LR 4 7 P5 0
coMA 683K 50
c c o s L 1 0 1 K5 0
ccDsL 220K 50
cl003
c1005
cl017
c l 0 0 2 ,c l 0 0 8 ,c l 0 1 6
cl004,cl020
Part No.
R07.PSOotrJ
When ordering resdsfors,convert
?esistance ualue into code form,
then rewrite the part no. as bef,
Symbol& Dccriptbn
- R 1 0 1 5 ,R 1 0 17 , R 1 0 1 8
R1001
S E M I C O N D U C T OARN D O T H E R
Pert No.
PA4(XI1
RKF€15
Symbol & Drrcription
rc1001
Connector
|r)
to
rÈ
1ç
E
(t/4')
3-
R.
6-
o
Èo
I
çU
71
N
P:
(o
|r)
\
_ (\l
to
t)
.iO
,
=o
(J-
Rtol8
:
ô
M o t h e r A s s ' y ,N o . 2
M o t h e r A s s ' y .N o . 5
tz
?
,ll
g
PA
t2
o
4V
to
1{
4o l(
d
na
?5
l(
I
!
l(
3
MotherAss'y
MotherAss'y,
C o n r r o l A s s ' y ,N o l 8 S e n s i n gA s s ' y , N o . 3 MotherAss'y,No. 32
Control Ass'y, No 6-.
MotherAss'y,No. 28
P o u æ rS u p p l y
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Control Ass'YNo. 8
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12.11 POWERSUPPLYASSEMBLY(RWR'0671
Part No.
PartsList
FUSE
Part No.
s3vc10
w03B
( s 1 8 0{11 )
152473
2W02
D601
D602, D606. D607
s3vc10R
0226.2A
wz-145
BZ-250
BZ-240
o2z5.6A
(wzos6)
BZ-10
D608
2D601, 2D603
D603, D605
D604
FUl
REK{63
CAPACITORS
Part No.
cEA 152P35
cEA 102P35
cEA 470P 10
c E A 1 0 1 P3 5
cEA 470P 16
c601
c602
c603
c604,C618
c605,C 614
cEA221P 16
cEA 100P63
cEA 102Pso
c E A 1 0 1 P5 0
cEA221P 35
c 606
c 607
c 608
c 609
c 610
cEA221P 25
cEA 220P 50
CEA 2R2P50
cEA 010P50
c E A 3 3 1 P5 0
c 6 11
c612
c 613
c 615
c 616
c E A 4 7 0 P3 5
C617
When ordering resistors, conuert the
resistance value into code form, and
then. rewrite the part no. as before'
Note:
RESISTORS
Part No.
RDT.PSFtrtrO J
DoE J
RDTaPS
R S l P Ft r t r O J
RCN{39
RCN{40
Symbol & DescriPtion
R601,R610-R612.R621,R623
R6O2-R6O9,R613-R615,R617,R624
R 6 1 6 ,R 6 1 9 ,R 6 2 2
2702W
R618
330 2W
R620
SEMICONDUCTORS
Part No.
l>
Symbol & Deæription
Symbol & DescriPtion
25D234
2SC17rt0LN
2SA733A
25D5æ
25A934
0601, 0610
0602, 06æ, 0606, 0608
0604, oo05
0607
06(x'
2SC1419
061 1
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zo604
2D605
2D606
2D,607
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Part No,
RKHOOS
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Mother Ass'y No 28
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ASSEMBLY
1 2 . 1 4 T A P ES E L E C T O R
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Mother Ass'y
No.82
Mother Ass'y
No.81
Mother Ass'y No. 57
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Ass'y No. 31
Mother Ass'v No. 71
Parts List
Pan No.
RSBO20
RCV064
C K D Y F4 7 3 2 æ
Symbol & Dcscription
Switch(TAPEI
Volume20K (B)
(OUTPUT}
c1301-C13(X
51301
VR1301
Mother Ass'y
No.8O
12.15FUSE ASSEMBLY
ol
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trol Ass'y, No, 14
tl
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s.K.
cR001
Pouær SuPPIYAss'Y,
No.4
PartsList
Part No.
REK{58
REK{44
Power transformer
soo1
FU2-FU4
FUs
FuseB00mA
F u s e3 . 1 5 4
Power switch
Supply Ass'y, No. 17
Supply Ass'y, No. 18
-j-
cT-F95Cl
13. TROUBLE SHOOTING
CONDITION
C A U S EA N D R E P A I R
r Fluorescent indicator lamps (level meters and
tape counter) do not light up, even though
voltage is applied to the filament.
r Defective Qzor (2SA733) in the indicator
assembly.
Level meter segments (see Fig. 13-1) fail to
light up even though the numerals and the
tape counter are on.
r Load a recorded tape or test tape and check
the presenceof an input signal.
r Defective lCaor (TA?318P) or
lCaoz
in
the
indicator
amplifier assembly.
fuPC324)
7*
F i s .1 3 - 1
r
Only one, or two,
counter light up.
columns
in the tape
I
I
r One of the segmentsin the tape counter digits
fails to light up (seeFig. 13-2).
,
Segment
V tt ll ,_ ,Ir-t
t I , t_t
Defect in the parallel vinyl-covered leads
connecting the indicator assembly to the
indicator amplifier assembly.
Defective lCaoo (PD4004) in the indicator
amplifier assembly.
Defective soldering of a component in the
indicator assembly (if the level meter is
operating normally).
r Defective ICaoc (PD4004) in the indicator
amplifier assembly (if the level meter is not
operating properly).
F i s .1 3 - 2
r OnlV one of the level meter segments lights
up, or else the segmentslight up and tum off
again rather sporadically.
The level meter numerals do not light up.
r DefectiveICsoe(PD4004).
r Defective soldering of componen(s) in the
indicator assembly.
r A break in the parallel vinyl-covered leads
connecting the indicator assembly to the
indicator amplifier assembly.
r Level meter and tape counter lamps are rather
dull.
r Defective Qzor (2SA733) in the indicator
assembly.
I Tape counter does not return to 000 when
the COUNTER RESET is pressed.
r DefectivelCsor (PD4004).
r Defective COUNTER RESET push-button.

OEiCiJ.:+,4 - Creapromedia

Transcription

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