Amstrad CPC6128 service manual

PRICE: £8.00
CONTENTS
Safety Test
Keyboard Exploded View and Parts List
CPC6128 Basic Hardware Analysis
Function Diagrams
Function Diagrams
Software Errors
Diagnostic Flow Chart
Alignment Checks
CPC6128 Main PCB
CPC6128 CPU Circuit Diagram
Electrical Parts List
GT65 Exploded View and Cabinet Parts List
GT65 Circuit Diagram and Voltages
GT65 Main PCB and Alignment Instructions
GT65 Electrical Parts List
CTM644 Cabinet Drawing and Electrical Parts List
CTM644 Electrical Parts List and Alignment Instructions
CTM644 Electrical Parts List and Voltages
CTM644 Circuit Diagram
Main PCB
Interface Circuit Diagram
Disc Control Circuit Diagram
Cassette Control Circuit Diagram
Mechanism and Mechanical Replacements
Technical Specification
Page
2
3
4
5
6
7
8,9,10,11
12,13,14,15
16,17,18
19,20
21
22
23
24
25
26
27
28
29,30
31,32
33,34
35,36
36
37
Back page
SAFETY TEST
All Monitors are safety tested to the following specifications.
1). Flash Test
Test at 3kV between the live and neutral of the mains lead joined together and
and ALL accessible metal points on the exterior of the set.
2). Insulation Resistance Test
Test between the live and neutral of the mains lead joined together and ALL
accessible metal points on the exterior of the set to show a resistance of at
least 4Mohm.
If after servicing there is any doubt about continued electrical safety the above
tests should be carried out.
AMSTRAD CONSUMER ELECTRONICS PLC
BRENTWOOD HOUSE, 169 KINGS ROAD, BRENTWOOD, ESSEX CM14 4EF.
Telephone: Brentwood (0277) 228888. Telex: 995417 AMSELE G.
2
KEYBOARD EXPLODED VIEW
1
Sym
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
2
4
KEYBOARD PARTS LIST
Description
Cabinet Top Assembly
Frame FDD
Knob Volume
Cabinet Bottom
Keyboard Assembly ESU-244
Compact Floppy Disc Drive
EME-155
Volume Rotary K121 LOlOT-20KB
Jack RCA 3.5 HSJ1061-01-440
User Port Socket HXC0730-0 1-0 10
Jack DIN TCS4450-01-101
Jack DC HEC0470-01-630
Jack DIN TCS4460-01-1011
Cord DC 14550401
Relay G4S-1112P-1-B-19
Cord Connector 8W6Q004A
SpeakerC040K01K2451
Part No.
170855
170856
170806
170857
170858
190005
170807
170022
170023
170850
170024
170025
170822
170123
170862
170124
CPC61 28 - BASIC
HARDWARE ANALYSIS
RED
NO
LED LIGHTS
?
>----1_--<
MAINS
FUSE OK
?
5V
DC PRESENT
ON
CABLE
NO
REPLACE
MAINS FUSE
NO
CHECK FOR
CABLE
OR PLUG ASSY
FROM MONITO
>-------l FAULTY
YES
CHECK INTERNAL
FAULTY LED
CONNECTORS,
1 - - - - BROKEN PCB TRACK
SOLDERED
{ FAULTY CONNECTER
JOINTS
CHECK KEYBOARD PCB
FOR SIGNS OF ABUSE:
- CRACKS
- LIQUID SPILLAGE
- DISTORTED MOUNTING
CHECK CONNECTOR LEAD
AND TERMINATION
YES
<
_ _IN_O
DO
ALL KEYS
OPERATE
?
TEST SWITCH
ON COMPUTER
KEYBOARD
UNIT
{
1 - - - _ FAULTY SWITCH
FAULTY VIDEO CONNECTOR
NO
NO
YES
RGB
VIDEO
CONNECTOR
INSERTED
FAULTY CABLE ASSY
YES
>---<
ANY
PICTURE
AT ALL
?
YES
>------<
FAULTY ULA
FAULTY PCB
NO
IF UNIT STILL
FAULTLY SEEK
SPECIALIST
ADVICE
REPLACE}
DISC
CHECK
KEYBOARD
CONNECTOR
ALL OK
{
NO IMPROVEMENT
SEE DISC
FLOW CHARi
STILL
FAULTY AUDIO AMP OR SPEAKER
DOES
SOUND
OPERATE
?
NO
FAULTY VOLUME CONTROL
FAULTY AUDIO CONNECTOR
PLUG/SOCKET
CHECK FAULTY MONITOR
• CABLE TERMINATION
• INTERNAL CONNECTORS
• BRIGHTNESS CONTROL
NOTHING{FAULTY ULA
Z80A
6845
CRYSTAL
RAM
FAULTY AY-3-8192 SOUND IC
Full diagnostic tests on the C.P.U. can be carried out using the Amstrad RP2 Test Pack.
Please contact Amstrad PLC for information on same.
4
FUNCTION DIAGRAMS
ICI/4
I
2
OUTPUT IQ
CONROL
ICIOI
ICI06
5
CPC6128 FUNCTION DIAGRAMS
FUNCTION
FOR A I1ICROCOI1PUTER AND
IC's
ICI08
IC 1/1
ICI07
o
ADRESS
BUS
Vo
PORTA
WRITE
CONTROL
I1AI
ADRESS
BUS
3 -RESET
INPUTS
I1A2
I1A3
-A2
I-AI
o -Ao
-GND
8 -RFSH)SYSTEI1
7-11]
CONTROL
RESET~to~TROL
6-DUSRO
4 - WA IT
CPU
BUS
CONTROL
3-BUSAK
Vee ---....._ _- - - - r -
........J
L-
2 -lJRjSYSTEI1
I -IW CONTROL
KEYBOARD SW,
CONNCTOR NO.
234
5
6
8
10
II
ICI02
ANALOG
CHANNEL C
TEST I
Vee
ANALOG
CHANNEL B
ANALOG
CHANNAL A
DEL
2
"
2
1
11$ If 1+ II
3
4
Q
ESC
TAB
IJ
If
W
E
S
lOA.
IOAs
1/
lOA?
IOA2
lOA I
lOAD
-
1/) If
If;
a
9
Ifi- 11= 1/
-
t
II
1/
CLR
f
.-
II
t
I
[
--.
P
@
If
ENTE
-R
'f
COPE 7
If
If
II
+
1/
L
II
IJ
12
C
B
F
II
J
II
If
K
V
M
11<
•
.
II 1/
1/
4
II
1/
9
If
5
6
ISH~~
1
"
2
3 ENTE
-R
I6
DB5
DB6
DB]
I7
ORO
I
.
AO
DBO
DB1
DB2
DB 4
DACK
TC
lOX
If;
1/
CS
I5
CTRL
If
VCC
RWISEEK
lCT/DIR
FR/STP
HDl
ViR
DB3
>
;.-
]
I4
SPACE
KEY
1/+ IJ;( II?
1/
8
I3
1/
N
RESET
R5
X
If
II
If
I
I
If
If
II
II
APc, Z
LOCK
D
11&
IOA4
IOA3
A
If
1/
II
1/,;, IJ
G
R
T
5
6
II
II
If
II
I
lie
U
Y
H
8
7
Vss
6
1/
!
Iq
INT
ClK
GND l.....
ROY
WP/TS
~PD
765A
FlT/TRC
PSo
PS1
WDA
USo
US 1
HD
MFM
WE
VCO
RD
ROW
---.,....::.:r WCK
Software Errors
If a drive fault is reported the fault may be a software problem. Before investigating the drive
please carry out the following checks to ensure it is not a software problem.
Detection and Correction of "Soft Errors"
Soft errors are usually caused by the following reasons.
1) Random external noise of several usec or less.
2) Minute off-tracking and shifting of write timing that are not detected during the write operation
which can cause the soft error during the read.
To remedy such soft errors, take the following procedures at the controller side.
1) Repetitive reading on the track by 10 times or more until the data is restored.
2) When the data is not restored by step 1, access the head to the adjacent track in the same
direction as move previously, and thereafter return the head to the original track.
3) Repeat the step 1.
4) If the data is not restored by the above steps, the error cannot be remedied
Write Error
When an error is caused during the write operation, the error is usually detected during the next
rotation through the read operation called "Write check".
To correct the error, repeat the write operation again and carry out the Write check.
If the result is still incorrect even after the write operation is repeated more than 10 times, either
the disc or the drive are working incorrectly. To find out the trouble source, carry out the read
operations with another track. Should the error still be found, change the disk and repeat the above
procedures. Should error still be found, the drive should be considered defective. If the 8rror is
removed, the original disk must be defective. Discard it.
Seek Error
1) Step motor or step motor drive circu it is defective.
2) The torque of the carriage is not correct.
Restoration procedures from the seek error.
Make the re-calibration to the track 00. Then, carry out the re-seek to the original track.
Notes:
1) Always ensure the head is clean.
2) Index/Sector Factor (Ready Defect)
As the unit has Optional Read Output
It is normally not ready until 2 revolutions are made after the disk insertion.
7
Diagnostic
Flow Chart
This chart must be used in conjunction with
the Alignment Procedures.
This chart is for information only and
does not guarantee an exact diagnosis.
For warranty purposes any faulty drive
mechanism must be returned toAmstrad
for replacement. Service Agents should
not attempt any repairs on the mechanism
or to its p.e.B. P.No. 30001.
3-A
N
Motor rotation
N
Read error
N
Write error
N
Disk Drive O.K.
8
Interchangeability error
FLOW CHART (cont)
3-8
Motor rotation
N
N
N
Check wiring
y
Adjust to 200±1 ms
N
y
Replace motor
Replace drive
9
FLOW CHART (cont)
3-C
Read error
Test with disk
EME - CF2
N
N
y
Replace drive
y
N
Replace drive
Replace
head assembly
N
Replace disk
(inspect by
drive)
Replace drive
N
Replace drive
10
Replace
TROO sensor
FLOW CHART (CaNT)
3-D
Write error
Head system
Open
Amplifier
system
Short
Repair
head connector
Replace
control PCB
Replace drive
N
N
Adjust
positioning
N
Media failure
Adjust
index timing
11
The data contained in the following 4 pages is for information only. Service Agents must not carry
out any repair or adjustment to the Drive mechanism and its associated PCB 30001 during
warranty. Fauity mechanism must be returned to AMSTRAD for exchange.
Alignment Checks
Please use this this information in conjunction with the diagnostic flow chart.
Equipment required: Double Beam Scope; EME - CF2 Test Disk (please refer to disk notes for usage).
The following checks can be carried out in routine servicing. If the wave patterns do not appear this
confirms a fault with the mechanism. Before attempting any replacement check these waveforms
thoroughly.
CE DISK
EME CF2
0
0
0
Content of adjustment and checking
1. Rc:dial adjustment by use of Track 19 (Fig. 1).
2. Adjustment of the index burst by use of Track 39 (Fig. 2).
3. Azimuth check by use of Track 39 (Fig. 3-4).
List of Test Points
Test point
TP 1
TP 2
TP 3
TP 5
TP 9
TP 11
Name of signal
Read signal of filter outlet
Read signal of filter outlet
Signal ground
TROO sensor output
Index signal
Signal ground
....
2ms
2ms
BLOCK 2
'U.5
ms ,....
1F
2F
.....
i
1F
-
i
,....
BLOCK 3
i
i
,....
BLOCK 49
I
I
,....
"
~
~ i4-500fJs ........
300fJs
500fJs
....
....
-
-
....
-
200ms (TOTAL 49 BLOCKS)
INDEX
INDEX
Fig.1 Waveform of T19 (Servp pattern)
12
ALIGNMENT CHECKS
.....,.....
-
500fJsec
Fig. 5-1 Index burst waveform
100
80
~
60
~
JI_
_
lajI-IE}
~-
Ibl
~
Amplitude
ratio (%)
40
~
--
~~
Inner: bla x 100%
Outer: alb x 100%
~
20
10
20
30
40
50
Amount of Off - center (I-' )
Fig. 5-2 Off-centre calibration curve
(Effective width of read head is 180u)
n
-12HH OB-48'
-72< +48'
+72'
0-8·&88-
Fig. 5-3 Azimuth burst
+
12 -BG-HB-
Fig, 5-4 shows azimuth burst in the cases of azimuth -12',0' and +12.
13
ALIGNMENT CHECKS (cant)
300fJs
+1142F (l25kHz)
.
-
500fJs
I
INDEX
Difference between Track 00 and 39
is within 18fJs (2')
Fig. 2 Waveform of T39 (Index pattern - Radial alignment)
1.8ms
0.6ms
~500fJs
r-01ms
100%
2F(125kHz)
4
3
2
INDEX I.B
Fig.3 Waveform of T39 (Azimuth, alignment)
o5
120
2F
2F
35
~
--
r-
OJ.
'O.~
2.0
0.5
I
2.0
2.0
921J
I _. t
~I
0.5
0.5
14
Aximuth burst
itII.i
Track
,enre'
}
j
- --
-I-
I
-
it
-r--
L-
2.0
3.5
O.
0.5
+72 - 48' +48'-72'
Index
burst
90 IJ
0.5
L-
0.5
10.0
U IL...-
35
1F
r-
-I
05
I
I
BLOCK 1
I
3sJL
0.5
....J
I
I
BLOCK 2 BLOCK 3
--J
47 pair servo-patters for posi~ioning use
Fig.4 Waveform of T39
,
I
BLOCK 47
ALIGNMENT CHECKS (cant)
1) Check Positioning
1)
2)
3)
4)
Load CE Disk.
Set up track 00, Motor off.
Scope to TP5.
Adjust 00 Sensor (8 on Fig. 6) so that scope shows correct difference as Fig. 2.
2) Adjustment of Index Timing
1) Load the CE Disk (refer to disk info)
2) Step the disk to the track 39.
3) Synchronise the oscilloscope by TP9 (INDEX). Set the time base to 0.1 msec/DIV.
4) Connect the probe to TP1.
Connect the ground probe to TP3 and TP11 (ground) of PCB.
Set the input to AC and set the vertical axis to 20mV/DIV.
5) Measure timing between sweep start and an initial data pulse. It should be 500 usee ±500 usee.
When the timing is not within this range, proceed with the following adjustment. (Refer to Fig. 5-1).
6) Loosen the tW'1 screws fixed LED printed board. Adjust the position of LED printed board so that the
timing is 500 usee ± 100 usee.
7) Re-check the timing.
8) Seek to the track 00 and make sure that the timing is within 500 usee ± 200 usee. Tighten the
screws. (Fig. 5 - 1).
3) Check of Head Output
This check is effective only when making write and read check as described below. If the output level is
less than the prescribed output, clean the head before check.
Disk used for this check must be in good condition.
1) Load the CE Disk.
2) Select track 39.
3) Connect one of the probes of the oscilloscope to TP1 of the printed circuit board, another probe to
TP2, and the probe to ground to TP3, TP11 (ground).
Invert one channel, and set it to Add input, set input to AC, and set the vertical axis to 50mV/DIV and the
horizontal axis to 20msec/DIV.
4) Make sure tha average output level is the following value or more: 140 mV p-p (SN 25dB or more)
If the output is less than the above-described value, replace the head.
4) Adjustment of Positioning
1) Load CE disk.
2) Select Track 19.
3) Monitor the output in the same way as the head output inspection.
Calculate the off-track amount in reference to the calibration graph, showing the interrelation
between the burst amplitude ratio and off-track amount. (Refer to Fig. 5-2).
4) The average of amplitude ratio should be below 26 um.
If it is not within this range, make the following adjustment.
i) Loosen the bolt of the rotation stopper which fixes the screw shaft (Fig. 6-3).
Rotate the screw shaft and adjust it in such a way that the amplitude ratio may become below
15 uM. Tentatively set the bolt at that position.
ii) Make the to track step to the inner and outer circles and bring it to the original position. Make sure
that the adjustment is all right. Then, tighten the bolt.
5) Confirmation of Head Azimuth
1) Load the CE Disk
2) Select Track 39.
3) Synchronise the probe of the oscilloscope by TP9 of PCB and connect another probe to TP1, and
the probe ground to TP3, TP11 (ground). Set the input to AC, the vertical axis to 10 mV/DIV, and the
horizontal axis to 0.5 msec/DIV. Make sure that the two outside burst waveforms are smaller than
two inside burst waveforms as shown in Fig. 5-3.
Note: Signal preceding the azimuth burst is the index burst.
If the azimuth is still incorrect reeplace the head assembly.
15
CPC6128 MAIN PCB
MCOOll A
16
17
CPC6128 CPU CIRCUIT DIAGRAM
~~O) ~+5V)
SOUND
CLOCK <I MHZ > L CPU
13 16 1>7
~4LS08
0
7
~D7 AND DG
D6~
VCC GND A8-
~,
15
~~~~~====2~'~D? IC102 RESET 'I;
~.;;
~~ AY~'2 ~ ~
A?
PADDLE PORT
9 PIN 'Ell CONNECTOR
JI02
"'"
RESET
SOUND OUT
CDM 2
AO
4
00
?R
<~
'~
1~~3~~~~~~~~il~~~~~~~~~~~~~~~T
6C2
'6 80lR
20
1r r
~h
C? ,' °,
...illL..Z
~
~
~,CiS:-+-I---~~"':~"-lC
ICla?
M5LB255AP-5
P.I.O
=
Q'OI
07
<0>
5
I
:~
~~
T
19
Y3
5
20
~~
~r
'------..J-I-+----....
~---.G
67
0
I
0:
!JR.4HC153
.2....
~,.2~ ~
1;~~~~32
A4
A3
~:::::::;:;:;::;;=t:j:==~=F7~'4HC==I=53=t=7t9:::J'0tgG
6
A2
7"';
4?
R147
47
-
~
14
00 ~
14
DO
1
a
:! a~ a~
a:
A
-0::
-a: -
<STEREO JA
A14~~?
A13
>
:
+
f
BUSAK
HALT
R!
ZC SOCKET
AO
RFSH
~~
~
~::=J
ICI'b6
74Lg~?3
?4HC2?3
O~~
02~
PORT
PRINTER
LATCH
Ol+-00 _ _
~
CK
11
~CI12
S320R
TIiWR
I2
74HC32
:
ICll2
74LS32
)-"3:.-_
4
11
ATI2
_+
6
4.?K
RD. WR IORQ
<HS-CMOS _USE,
~
I STROO~
16
1506
15
<+5V J
IClm
32K 8YTE
200N SEC
22
1
~I~q~~~~~~
903
11
04
702
501
<~I~~
ICI26
~
I
It}--~
l=:
P5==: ~~
L-
~~
L
...!.i.-
~
----i
:::=::::!
017-+--";"'6~9
0
g4
15
12
01
2
o0i~§~~J9~
S
i~NMWE
NCAS ..
~
?~373
j
IC112
,-7:.::4~L=S;:32=-,0:",R~.:..74~HC=32~
9
~'~~~==t~~t~~t~~+-'
12 L~'o)
"----'I
R124
1 .5K
RAM DIS _
<8US, (43)
~
:j
1
~~~~-~------
ICl16
~~1~Y
.:.'.;DS
L---~--.:':40':.lD4
L
3~
37 01
L~
~~~~
a:
-,-3::5:.j DO
'<~~'
~~--=24c.jCKI6 H5G31?0
L
L _ _~
0
Iti a.;;
<O~Xl01
16MHZ
<0:
r::tl
1
ul~!);
11
~-,29=-1 NRAMRO
A14
(4)
~H:+.=
~_~
~~~
~~
0.1· EDGE
I? NMREQ
Mi ~'?L-....1Q.
Ri5 (32)
~
21
NMI
RD
10RQ <3ll RI44 18 NIORQ
1m" <35'
32 NINTERRUPT
4.7K
JI05
IC. SOCKET
~
<OJ
BLUE
1~1~1~
(0)(0)(0>
(+5V )
IV)
~
2SCiSlSY
~ ~~
0:-
0
6
tl'---t> II
'"
L.,"-<~
"' ffi
S
NSYNC SYNC
LUM
0
1.0
_
'"
co)-
RIa?
4
_ _2_2_0_ _---'51>
30 A14
-;,--_R_E_S_E_T_(_4_'_>_8_2_...!t~:~::~ET
MREQ '26>
JCll?
?4HClJ04
I
a:
c::
_rl>31
l8i.I~!~
QI02_\~
[TYPE]
H5 63 I 30
0R
<50> <4MHZ CLOCK) 56
ICl17
74HClJ04
-;l
~ =~
M'[ij'e
270
~i~YNQ:.;;.:3:.:.J _ _...;28~AI5
~_R,,';;,55=-~~ _ _-(2x: I? r-_1~
¢ ...
li
f'=8+-t--+_R':!'~30C+m_
~~i~D
-=3'='S-l03
~~~Y +------4---~---~-+---~---<-oil--V:J-----------------------,lL
_ _---'(:.:3::::9"-,R"",,4~'-=2:=j2READY
RI43
8
38 02
VOOI
I-w...;:::......<-O-'- ( +SV >
VD02
VSSI
1-"::54
VSS2
VSS3
1-_
~
GND
<0'
NDTE:
•
Ie 40007-X AND Ie 40010
ARE ALTERNATIVES -INSTAlL
O1'E!lIl.
THE
OTHER BUT
lIJI. BOTH.
ROMEN,....<4...c2'"-J_ _...;2::;?'-l NROMEN
CONN
m
1 1 l 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1° 1
1
PCB
MCO009A
2
3 4 5 6 7 8 91011121314151617 1819202122Z3242526'Z728293031 32333435$373839404142 434445464?4S4950
sa..w A15 A13 A11 A9
A?
AS
A3
A1
D?
os
03
Dl
(+5V)
M1 IORQ iR "'iNT i.i:5RQ READY RESETROMOIS RAK>JS L PEN GNJ
13M)
A14
A12
Ala
AS
AS
A4
A2
AD
C6
04
D2
IX]
MREQ RFSH
RO HALT ...., BUSAK BlIS ~ RAMRi5 CURSOR EXP
CHASSIS SCHEMATIC DIAGRAM
¢
RESET
19
,I~~4 D~7::~EN
L---~--=__106
~'j~3~~tPI
C42}
RED
2
a
R128
G F+-+-+""2"'7"0-+-'--<> I I GREEN
I~NCAS
l-
IC114
?4LS3?3 clc;4;'--++-HI-+..J
DATA
LATCH
1
87
SUFFER
-00-
12
4 CCLK
He-IS
50WAY
__!.14~NCPU
IC"S
74LS244
DATA
12
BUFFER
OR
14
74HC244
16
18
.lOE'
JIOI
VIOEO OUTPUT
CONNECTOR
<S PIN DIN'
DISPEN
...23.wl NCASAO
~
3'1'
(I6MHZ CLOCK >
~----. ROMEN
uf~
12.14.16.20.27
:;:::=::J;j
<+5V)
HSYNC
w.L-
04
I II
---
V5YNC
E
~ ~
IJ'9
1-1'-.4:.-_--,
r-~~~~--:--:_~~~~~~++-H++-H
20
PRINTER
PORT
36 WAY
0.1" EDGE
CONN
f;;
WE
4
V SYNC
1-----'
07
06
C43}
2.4.6.8. 10.
~
D?
g!J ----±
~ OS
ROM DIS
~;~~~Y
DO
RAS
14
DO 1-"'4'---_ _~
-.-3- 01
04
D3
D2
1
13 OS
EXPANS ION CONNECTOR
~
R'54
.....--~wv-----_
OTHERW I SE SECOND BAN~ I S
COMPLETELY PARALLEL
WITH FIRST 8ANJ::.
~TIiiiR
QQ
-
ICl28
f_
00 ~ 01 ICI27 CAS
15'(' ,'(
CASO'-"'ST"--'S'"'A'"'NK;;:.J'ONLy",
J ----
ICI'O
?4LS132
01
8US
--,
~
r--
-2
EXPANSION
123 8~WRi5
EN
HSYNC
V5YNC OISPEN
1 ,19
~~ EE
~!J - 10
I
lORD
01
VCC = V >
GNO
<'
< 0) R112
2.2K
DO
HM4864U-2
I--
A~~ TMM-232R~~'953 ~ g~
30
IOWR
~
D2
)
CURSOR
ICI10
74LSI32 OR ?4HC132
~ RA3
47
4?
LPEN
QQ
ICI328 OFF
2 I-64K X IBIT RAM
04""""":' 01 ICl31 ALL PINS EXCEPT
~
0ATA
D3 ~ 01 ICI30
FULLY PARALLEL
N.C
~~4
O.IX 34 <BC'
22 20
J 41 3T
~---l-'--...,
~~
< OJ
C101-C134
DO
01
BANK DNLY >
A9!~
~ ~ d~ ---------------
-'4
RAS WE
~~!J ~
WAITI"?",-4~~~---"<~,.,..,,, READY
c.£..I.l.
IC119V;S
A12
gJf~
~
-=---.
ICl20
CASI~
2 ......--~t-J
I ~ GND
CONNECTOR
~1-=~=iCj:"'=-~±"<~''?> 8USRQ
h'7
~~h1' ~~~
ICll I
Z8400AP5
01 IC121
'2ND
DO
DO
~
~2f01
~N ~N
~T
A'S
<32X33X31>
DI
~ :: ~ g
~._
'" ~
0:
.-.--
0' Jl03
STEREO
+SV
<' J
~
-
EXCEPT
DATA FULLY. PARALLEL
DO ~ 01
~.~-
RESET
02
DO
64K X IBIT RAM
I--
l
HM4864U-2
I--
14
~ ~IC122ALL PINS
01 IC124 8 OFF
l3L~::;;:;~::+
R14I1!0 J
CUREN pI9,--,-=_
_
10 K
I i
1_8:;:.1.L-:
19~1.:;3l.:'=Ol:,,:l.I.:l-,,2cI....::SL.::?..L.,:ls'l-l-.
_ _S:,-:2 r D1' SNO vee A 7 ' 0 001-"'4=O? +----":f_ IC134
_
2
14
OS +----":- D1 IC'33
~ D5~
03
SQIJt!D
126
ii\iSREsET .--.J
-
~~ ICl23
EXP <EXPAN
SION)
V SYNC
5
~
00 ~
ICI25
04
ff
2
,'4
DO ,---._
L PEN
MAIO
~--+_+-_~_-o-,2S21-lCCLK
4?
4?
30
31
32
~ ::~
64K J R1SO 4?
47 HI46
?q
REsETI---=2~_-_..HiE5ET
MAl
54
----if-f---+-I----l---1~'-4HC---''-l,~
Al
IN FOR
(OH+5¥)
?151
AD
~"U<1'
oiT~~119~11
101,~~32
~~k132
I
3
4
6
T'd ~
J
o<---'-±-
IClll
Z80
DATA BUS
O?
06
OS
04
03
02
01
DO
28
D4
~'~2~::::==:;-i-I--~~_1~2:iMA8
8 A2 4
<CASJ
RI58
IC1052
6an
4LS153
...._=vv=--:f-f-_ _-J--I-_ _-l---1---1-',l1~,
3 '3
5
<RASl
3
...
A9
AO
(+5V)
~~
ICloo
03
02
~
01
JL.Q&
DO
CONTROLLER
~~~
A14
A9
I-fj22~ry===::::
2~
• AS
D7
06
OS
3~'[3:::ltt±::===::::===tj======:J;dMA3
R148
f_
;~~~~32
ff
..--L 01
~
"'49
os..--L
O.S'LINKS
l--..-o_
13 1011 I>
VCC A?
'1/'1
RS
2L.J.;J
3 MM
7 9 10 G B A22~1[2==tt===::::===t=±=====i38[j
IC113
13
74LS1S3
.0
11 I
5 I
3 ~
v
2
hR
'-~r- 1 ~ 2J..!;!
MA
'-------++---l-...
~l.K6.,,=~--===-.J
~IC126
OS
1B8====3=':±l1
10M
21
CAS I
4?
~J<S~
"to)'LK3'
RI4S
....-+'CW....-!I?
I?
1Il - 1M
IC117
u
74HCtJ04
<+5V
RI02 2.2K I
o)
16L8AC
AMG40030)4
I
IJ~T:
c:>t5l 'LK2'
~
\35
I,
PADo---ff MAil
"":===~=I=::'~~ ;4LSI5~1-1]~[;;:j~· tj~==::tt===:====!=:j:======94MA5
A6
A5"
A11
AlO
IG
' 1<0l
~D?~~NO
SOUND
~ lo~
p:~/HAL PH'5rt--,R'-';lil~i"'+r-l(
~
~~:
~
3
--.......-'§
pt'2q:=+=:t=:::A'SOUT
~ J'06
IC.SIIQ(ETE ~I'
EPIT
~
I
ES 2S
0
BA
ICI04
RI51
~
~'LK4'
20
19
8
BO
o
~
NCAS
A15
A14
16 MA12
I
:;:::::::=:}!::0~R;:::2°~~~~7_·:-'lUJXX:,...,.~3.J,~3~~:t~2;=k'~4==:::t:t===tj====:===i=t=====TI10U~~~
....
'ALL OUT FGIR 128K
WR DATA
~++tI=======~
22
21
::J:
g~
0l
1<,
f+fiV)
F6R~T) ,,~:~ 7_4_HC_'5_3_++9_'.ll~0'bG ~~J3-~t=:::I:+===t=t====:===±=t====:j~~~~~~~
to
cJ(80-
RO;A;~
H
~-I_++_If_~t-_E
'-----+-1-1-+++---+
00800
'"
~~
~1~~ff~I~,~~~A~'41°UfT
IC 116
4-+1
RI 2
'llS3
31
<+5'/)
(NOT
6
ICloo
_ _ _ " ?4LSI53,3
2 Se21Z0Y
07
'77
J
----1
~
5
Xl Yl0
X2 X3 X4 XS X6 X? X8
Y9
CP1Dl,CP102
Y8
KEYBOARD
Y7
CONNECTOR
13
14
15
.6
0~6
H-:f-+-I------';',5~6< •
14
CO
~
~ A
~~MMON
2 3 4 56? B 9
9~~'§~~~~~ 12
II
IC101
74LS1458
10
DECO '7 9
~';":6~+-I-~~--7"2'cl0
GND
-------J;
DO RESET
RAMOIS
200WN
1
100
A140UT
or
D7 AND OS
6 FIRE 2
'-'i'=-----J
~vee
120
-<>
9
0>-t
:
<OUT>I"':~L.....----:~~!'l GENERATOR10~f~~~Eg~~~~~~~~~~~§~Et===~~L,~9~ ~fteRE, ]1
~
I r-
~ ~
.-.....,~2~0c-_.,,~1_.,
AI5OUT·...---:';;;°.pG B A 2'1-1~2t==t:j:===tj~==:::I:t=======l=±=====::TI'7qMA13VCC
GND
2~4
C2D5-3
NOTE' THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND stJB..JECT TO CHANGE WITHOUT NOTICE.
20
M208-01
1-3583
ELECTRICAL PARTS LIST
Circ. Ref.
Description
Carbon Film Resistors
R146-153, 161, 162
470hm
R155,306
560hm
R141
820hm
R136
1500hm
1800hm
R134
2200hm
R137
R126, 128, 130
2700hm
R317
5600hm
R1 25, 127, 129, 135, 157, 158,
6800hm
301
R113, 121-123, 132, 140,211,
1kohm
212,216,313,315,321
1k50hm
R124
R102, 109, 110, 112,214
2k2ohm
R131
3k30hm
R144, 310,323
4k7ohm
R114-117, 120, 133, 142,217,
10kohm
309,312
18kohm
R308,311
R118,119,304,305
22kohm
R302, 303, 307, 319, 320
47kohm
R314
470kohm
R111
1Mohm
R101
3M30hm
R143,145
10Mohm
Fuse R322
4ohm7 V4W
R316
100ohm1f2W
Ceramic Capacitors
Part No.
10020
10022
10030
10036
10037
10040
10042
10050
10052
10061
10065
10069
10073
10077
10085
10091
10093
10101
10147
170867
170868
170866
1400183
170869
15pF
C137,138
400107
C139-141,310
220pF
170126
270pF
C313
24004
470pF
C306
24020
C101-135,201-213
0.1 uF
Electrolytic Capacitors
20062
C309,311,314,317,318
1uF/50V
20025
22uF/10V
C308
1400244
C136, 303, 306
47uF/10V
20028
C301,304
100uF/10V
20028
C315
100uF/16V
Polycarbonate Capacitors (All working voltage 50V D.C.)
0.001 uF
0.01 uF
0.047uF
0.068uF
0.1 uF
Diodes
D1 01,303,304
D201
D301
D302
C312
C305
C318
C302
C319 320
1S2472-HS
DS442XFA5
10E1
SLP-155B (R)
170217
170128
1409178
170129
170851
170115
170816
170865
170866
Circ. Ref.
IC's
IC101
IC102
IC103
IC104, 105, 109,
113
IC106
IC107
IC108
IC110,210
IC111
IC112,207
IC114
IC115
IC116
IC117
IC11 e
IC119-134
IC201
IC202
IC203
IC204
IC205
IC206,208
IC209
IC211
IC212
IC213
IC301
IC302
Tra nsistors
Q101
Q1 02,301,302
W303
Miscellaneous
J101
J102
J103
J104, 105
J106
J301
J302
VR301
CD302
CD201
FDD201
NR101
NR201
RY301
SP301
X101
Description
Part No.
HD74LS145
AY-3-8912
TMM-23256P-1953
HD74LS153
170101
40001
40025
170103
HD74LS273
M5L8255AP-5
HD6845SP
HD74LS132
Z8400APS
HD74LS32
HD74LS373
HD74LS244
HSG3130/3170
TC74HCU04P
PAL 16L8AC
MSM3764-20RS
UPD765AC-2
FDC9216BT
SN74HC240N
TMM-23128P-1851
DN74LS08
DN74LS38
DN74LS136
DN74LS27
DN74LS74
TC74HC161 P
LA4140
LA6358S
170104
170105
170106
170107
40080
40013
170108
170109
40010
40008/A
40031
170110
40018
170812
170863
40015
40011
40019
40016
40012
40014
170864
170111
170814
/2SC2120Y
2SC1815Y
2SC950Y
Jack DIN
Socket D Sub 9
Jack RCA3.5
Socket IC 20 Pin DIL
Socket IC 10 Pin DIL
Jack DC.
Jack DIN
Vol. Rot. 20k
D.C. Cord
Cord Connector
Compact Floppy Disc
Drive EME-155
R. Network Exb P86222J
R. Network Exb P87681 J
Relay G4S-1112P-1-B-19
Speaker C040K01 K2451
Crystal HC-18RW 16MHz
170113
170114
170448
170025
170023
170022
170021
170865
170024
170850
170807
170882
170862
190005
170860
170861
170123
170124
170859
No part numbers are given for any parts on PCB30001, should there be any electrical
fault with that PCB Service Agents should return the whole Disc Drive Mechanism
complete with the PCB for replacement.
21
GT65 CABINET EXPLODED VIEW
,
&o".~::::-
~9
7
8
13
~
5
I
19
CAUTION! PARTS MARKED
• MUST NOT BE REMOVED
UNDER NORMAL CIRCUMSTANCES
18 17
15
GT65 CABINET PARTS LIST
Sym
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
22
Description
Front Cabinet
Cable Clamp
Bracket Cabinet (L)
Bracket Cabinet (R)
Bracket P.C.B. (L)
Bracket P.C.B. (R)
C.R.T. Green
Metal Washer C.R.T.
Fixing Screw C.RT
Deflection Yoke
C.RT Socket
Power Tx.
Rear Cabinet
Control Knobs
Button Power
On/Off Switch
V. Hold Pot.
Contrast Pot.
Brightness Pot.
D.C. Cord
DIN Cord
D.C. Jack
u Metal Shield
Part No.
170831
170502
170504
170503
170505
170506
170507
170508
170509
170510
170511
S/170832
170513
170514
170515
170516
170833
170518
170519
170316
170317
170834
170512/SH
16
~~~R~--
,
~18-
------.-~I..:3
.
~
L701
J8
~r
j----
J8
~r
~~
; 6
iiJ
25V10
~it
;~~
O~~
~
II~
~
2.0IXXl0B
0.9-1.9
~ ~ ~
;a ;H ;H
t"1~7
",,1.Ii®
<:060'
0&>1:""
':,'';:'
'" .;;::,.,
I I
,---«.;;
"I
=j
~ ~
.0 1f2lO
1!·
~~
i
" ,;
__________________j
••;;( 1/210
r-~
~
§
i"
~
J;'Jl:,.®
~y~
.
FF.!4
60"'"
I....,..,.
~
B
~~"1i::_i~L!~tF
"'
~
~ ~
~
5
::
1
,~
~1 -i~ij!l..:3
~
~
~
-
:
!
01
r-
()
~I ! L ..
::xJ
()
~ ~
@>
;t---"R?Z!~'=-lf)
~~'5
~ITCft
ElREEH
C
DISPlAY'tl.I£
-I
C
V?OI
91oote11
tf1~
~;;;;,I
II
9~3SO
'1
,j,
»
C)
::xJ
,
»
:s:
20.2003
[
6P<XXXX11
il'JJ
I Lh
PCB701
MMDOO?
C)
CHASSIS SCHEMATIC DIAGRAM
C0602
AC 22SV wa
NOTE: THIS SCHEM....TIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHruT NOTICE.
CAUTION' SINCE Tl-lESE PARTS MARKED BY
CRITICAL FOR SAFETY,
DESCRIBED
Oi~
&
USE ONES
PARTS LIST ONLY.
E
ARE
ATTENTION' lES PIECES REPAREES PAR UN.Lh ETANT
DANGEREUSES AN POINT DE VUE SECt.RITE
N'UTlLISER QUE CaLES DECRITES
DANS LA NCJ.ENCLA Tl.RE DES PIECES.
B
c
0501
5.1 V DC
12.0V DC
5.5V DC
13.6V DC
12.6V DC
I
,
I
.j:>.~OI\)O
eo I\)
<01\)
20.6V DC
00
o
om
os::
G')
2.2V DC
39.5V DC
.j:>.WI\)~n
I
I
I
I
UI
(Jl(Jl01\)~
oi.n<o
<i.no~':' «0:....·
o<o<~
0605
2.0V DC
.j:>.WI\)~n
<.n
I
0502
N
-I
en
r---------------
""'"
'"M501
6P<XXXX1'
(,J
G)
~
TP501
~
~ ~YaR) I
~
0
<:060,
• ',.
~$~
CI-f")
L702
~ ~
~~~2.6
00E"10l10'
+tj
0712
...,""
""""-'ST
j~~
~~
~
~~
71011202
Ooo<~
00
OCD;::P--.J(j)(Jl.j:>.WI\)~n
I
I
I
I
I
I
I
I
I
I
'""'"
~(j)0(Jl1\)0~~~(Jl~
:-"o<i\)eom99:-"eo.
CD<O(j)W~.j:>.())CDCD
CDOO«<(Jl(j)())<C:
<0
000«<0'"
om
os:: o
o
G')
ooooooo~
000
0
-I
en
01
or-<
-I
»
G)
m
c
.... »
-I
to)
J:
I\)
»
GT65 MAIN PCB
POWER
P.C. BOARD
,.
'"ltl '"(5
0
10 <>
N .....I
<>
<>
r-.
I
'"
,
<'l
00
'":
Ii~
C:Qt~ti.!
~~2E.3~
C>:<'lCllCllCll::'
-:C\jM ... lOCO
lOUDcf 01
GT65 ALIGNMENT INSTRUCTIONS
STEP
1.
24
FUNCTION
5V Adjustment.
SIGNAL IN
SIGNAL OUT
METHOD
Monitor Switched on.
A.V.O. across C519.
Adjust VR501 to obtain 5V.
2.
12V Adjustment.
Monitor switched on.
Emitter of Q502 & Earth.
Adjust VR502 to obtain 12V.
3.
H. Hold.
Monitor switched on.
Monitor Screen.
Connect Frequency Counter to CRT Heater.
Adjust L703 to obtain 15625Hz on Frequency
Counter.
4.
V. Size & Linearity.
Page Program for
Graphics.
Monitor Screen.
Top of the page can be adjusted with VR703 and
Bottom of the page can be adjusted with VR702.
5.
Centering Adjustment. Program Border - 26.
Monitor Screen.
Adjust the magnet on the back of the neck to
centre the border.
REMARKS
The adjustments are Linearity
& V. Size respectively.
GT65 ELECTRICAL PARTS LIST
Part No.
Value
Circuit Reference
Carbon Film Resistors (V4W)
470hm
R723
820hm
R721
R616-618
1000hm
3300hm
R613
3900hm
R619,722
4700hm
R603-605,606,720
6800hm
R602,604,711
R506-508, 510,601,609,
1kohm
730
1k50hm
R501,717
2k2ohm
R620
2k7ohm
R612,621,705
3k30hm
R502
R610, 701, 702, 716, 718
3k90hm
R504,714
4k7ohm
5k6ohm
R503
8k2ohm
R713
R611, 707, 712, 725
10kohm
R706
15kohm
R710
22kohm
33kohm
R731,732
R704
39kohm
R719
47kohm
R726
56kohm
Fuse Type Resistor
10ohm/1f2W
R715
I
Electrolytic Capacitors
C730
1uF/160V
C717
2.2uF/50V
C703,719
4.7uF/50V
C511-513, 516, 705, 707,
10uF/16V
713
C712
10uF/25V
10uF/160V
C731
22uF/16V
C706
C602
22uF/63V
C710
33uF/10V
C720
47uF/16V
100uF/25V
C517
220uF/10V
C709
C727, 728, 732
220uF/16V
C515
330uF/25V
1000uF/1 OV
C711
C510
3300uF/25V
C509,514
4700uF/16V
I
Polystyrene Capacitors (All 50V. D.C. W.)
C715
0.0047uF
C714
0.0068uF
O.0082uF
C723
0.01 uF
C718
0.022uF
C721
0.033uF
C725
0.047uF
C701, 702, 708, 716
0.082uF
C722
Circuit Ref.
I.C.s
IC501
IC502
IC701
IC503
Transistors
0501,502
0503,505,
603,604
0504,506,
601,602,701
0605
0702
0703
Diodes
D501-508
D509
D601
D602,701
D603
D702,703
D704
D705
D706
D707
170603
170604
170605
170606
Ceramic Capacitors
100pF
C603
C604
200pF
0.001 uF
C724
0.0047uF
C726
C501-508
0.047uF
809256
20037
170608
20025
170609
170610
1400244
800370
170611
20029
170836
800372
170612
170613
170437
170614
170615
170439
170616
170617
170422
170618
Miscellaneous
CD501
CD601
F502
F503
TH701
V701
170621
Part No.
L78MG - OEC
L78MG
UPC1 031 H2
I UPC78M12
170446
170446
170622
1422278
2SD313
KTA1015Y
50005
170453
KTC1815
170447
KTC2229Y
KTA950Y
2SD1159
170624
170448
170623
I Reel. 30D
- IFC
Reel. 10D - 1
Zen. RD47FB
Sili. DS442X - BT
Zen. RD56FB
Ger.IN34A
Reel. V09C
Reel. V06C
Reel. B B-4
Reel. 10D-2
Variable Resistors
VR501
S.F.500ohm
VR502,703
S.F.2k
VR601
ROT. 1k
ROT 10k
VR602
S.F.50k
VR604,605
ROT 30k
VR701
VR702
S.F. 10k
1422151
809246
1400240
20024
I
Description
Coils & Transformers
D.Y.71011202
L701
L702
Linearity CL. 21000006
L703
Horizontal C.L. 305Y001
C.L. 100uH
L704
T501
Power Tx. 0766001 E
T701
H.Drive Tx. RB20852
F.B./Lopt 2012003
T704
1422144
400107
1400125
170600
24015
I
170619
170620
I
170601
1422126
170602
I
0.0033uF/630V C733
0.068uF/400V C729
Tantalum Capacitors
1uF/25V
C704
10065
10069
10068
10073
10075
10077
10079
10083
10085
10089
10093
10097
10099
10101
10103
Metal Film Resistors
R708
1ohm/1W
0.22ohm/2W
R505
4ohm7/2W
R614
R724
12ohm/2W
Part No.
I
10021
10030
10032
10044
10046
10048
10052
10061
Carbon Film Resistors (V2W)
220hm
R727
R509,615
1k50hm
22Mohm
R728,729
Value
Circuit Reference
Polypropylene Capacitors
D.C. Cord IG060401
D.I.N. Cord 8GE 70001
4A(T) Fuse
2A (T) Fuse
Thermistor SDT-250S
C.R.T. 31 OGNB31
I
170625
1400125
170626
1422117
170627
170628
170629
170630
1422116
1400123
170510
170631
170632
1400148
S/170832
170633
170835
1422189
1400230
170518
170519
920142
170833
1422191
170316
170817
1400254
1400253
170635
170507
'-
,
25
CTM644 CABINET DRAWING
13
MECHANICAL EXPLODED VIEW
20
21
CTM644 CABINET PARTS LIST
Sym Description
Front Cabinet
1
Control Knob Brightness
2
4
Button On/Off
Power On/Off Switch
4
Brightness Control
5
Degauss Coil
6
C.R.T.
7
Deflection Yoke
8
C.R.T. Socket
9
10
Metal Washer Bottom
11
Rubber Washer
j 12 Metal Washer Top
Fixing Screw
13
14 Static Rings
15
Handle
Rear Cabinet
16
Handle Retainer
17
F.B.T.x.
18
19 V. Hold Control
20
D.C. Cord
21
DIN Cord
23
D.C. Jack
24 Service Normal Switch
26
Part No.
170841
170304
170305
170306
170315
170842
170307
170308
170843
1400011
1400012
1400011
1400013
170311
170312
170313
170314
170467
1400035
170316/A
170317/A
170844
900101
CTM644 ELECTRICAL PARTS LIST
Value
Circuit Reference
Part No.
Carbon Film Resistors (all1f4W unless otherwise shown)
1000hm
2200hm
2700hm
3300hm
3900hm
4700hm
1kohm
R810, 901-903
R407,416
R807,811,814
R401, 404, 422
R414
R505,510
R411,423,432,519,815,
816
R420, 421, 441
R402,403,442
R410
R904-906
R426,518
R415
R406, 41 8, 41 9
R424,428,429
R409
R431,450
R425
1k50hm
1k80hm
2k2ohm
2k7ohm
4k7ohm
6k8ohm
8k2ohm
10kohm
12kohm
15kohm
27kohm
10032
10040
10042
10044
10046
10048
10061
10065
10067
10069
10068
10077
10081
10083
10085
10087
10089
10095
R412,440
R417
R430,439
R408
R413
R504
R451
1ohm2/1f2W
R443
470ohm/1f2W
R445
680ohm/1f2W
R447
R514-517
1 kohm/ 1hW
R448
1 k50hm/1f2W
R446
2k2ohm/1hW
R802-804
2k7ohm/1hW
180kohm/1f2W R506,507
1Mohm
R801
10101
10103
10107
10115
10117
10119
10129
170401
1422125
809223
1400165
1422126
170402
1400166
170403
1400171
47kohm
56kohm
82kohm
180kohm
220kohm
270kohm
680kohm
809252
170404
809256
1422141
1400184
R521
R444
R511
R438 437,
R435,
Cement Resistors
5.6ohm/5W
150hm/7W
Part No.1
120ohm/1 W
1kohm/1 W
3k90hm/1W
15kohm/1 W
0.22ohm/2W
150hm/2W
330hm/2W
82ohm/2W
100ohm/2W
3k30hm/2W
6k8ohm/2W
1ohm/3W
170405
170406
170407
170408
170409
170410
170411
170412
170413
170414
170415
170416
R449
R503
R505
R805,812
R513
R512
R509
R520
R433
R427
R405
R502
-
Electrolytic Capacitors
1uF/50V
1uF/160V
1uF/250V
4.7uF/50V
10uF/16V
22uF/10V
22uF/250V
47uF/10V
47uF/16V
47uF/50V
47uF/160V
100uF/16V
100uF/35V
100uF/160V
100uF/400V
220uF/35V
220uF/160V
470uF/10V
470uF/25V
470uF/35V
2200uF/25V
C414
C419
C506
C407,420
C520
C437
C430
C436
C405,418
C512
C401
C412,443,523
C425
C515
C505
C507
C515
C518
C435,519
C402,522
C424
20062
1422151
1422152
1400240
20024
170418
170419
170420
1400244
170421
170422
20028
1422157
1400246
170423
20055
170851
170424
20044
1422262
170425
Ceramic Capacitors
Fuse Type Resistors
1ohm/%W
8.2ohm/%W
10ohm/%W
0.82ohm/1W
2.2ohm/1W
r
Circuit Reference
Value
Metal Oxide Resistors
I R436
R501
1422138
170417
I
22pF/500V
100pF/500V
130pF
180pF/500V
240pF
270pF/2kV
330pF
560pF/500V
680pF
2200pF/4kV
0.001 uF/500V
0.001 uF/2kV
0.0015uF/2kV
0.0022uF/2kV
0.0047uF
C416
C423,441
C806
C403
C804
C432
C803,807
C417
C802
C513
C516,521
C511,801
C510,514
C502-504
C508,509
1400217
1400218
170426
170427
170428
170429
1422255
1400220
1400213
170430
170431
1422147
170432
1400223
170433
CTM644 ALIGNMENT INSTRUCTIONS
STEP
FUNCTION
SIGNAL IN
METHOD
SIGNAL OUT
REMARKS
1.
Black and White
Tracking.
Monitor Screen.
1. Turn R & B Drive Controls VRS04 & VRS05 fully
counterclockwise.
2. Turn R, G & B Bias Controls VRS01, S02, S03 fully
counterclockwise.
3. Set Ser. Nor. Switch to Ser. position.
Monitor connected to CPC664.
2.
Black & White
Tracking.
Monitor Screen.
Monitor Oscilloscope.
1. Adjust 120V at the collector of OS02 with
Brightness Control on the Oscilloscope.
2 Rotate the screen control to fully counterclockwise
& bring it back to obtain a dim line of one
prominent colour.
3. Rotate the other two colours till a dim white line
is obtained.
4. Bring Ser. Nor. Switch to Nor. position.
Monitor connected to CPC664.
3.
If required, adjust the colcur
control.
If no satisfactory results repeat step 2.
4.
Vertical Size.
Program the paper
edge.
Monitor Screen.
Adjust VR406 to obtain paper edge to be 145mm.
Use non magnetic ruler.
5.
Focus Adjustment.
Program the paper
edge.
Monitor Screen.
Adjust Focus Control on the Flyback Tx. for maximum
definition & details.
Brightness & Contrast controls
set to normal viewing.
6.
5V Adjustment
Switch on the Monitor.
AVO Meter.
Connect AVO. across C51S & adjust VR501 to
obtain 5V exactly.
7.
Sub Brightness
Control.
Switch on the Monitor.
AVO. Meter.
Connect AVO. to collector of OS02. Adjust VR402
to read 120V.
Keep Brightness Control to
S.
Sub H. Hold &
H. Hold Adjustment.
Switch on the Monitor.
Frequency Counter.
Rotate H. Hold fully counterclockwise.
1. Adjust VR404 to read 14500Hz.
2. Adjust VR403 to read 15625Hz
Read the Meter across CRT
Heater & Earth.
This adjustment (6) should not be disturbed under normal conditions.
maximum position.
27
CTM644 ELECTRICAL PARTS LIST
Circuit Ref.
Diodes
D401
D402,403
D404, 506, 508
D405, 407, 408
D406
D501-504
D505,507
D509
D510
D511,512
D901-903
Part No.
Value
Circuit Reference
Polypropylene Capacitors
I
170434
1400202
170435
0.012uF/1600V C431
0.1 uF/250V
C501
0.82uF/200V
C429
Polystyrene Capacitors
0.001 uF
C442
170850
0.0015uF
0.0047uF
0.0056uF
0.01 uF
O.015uF
0.039uF
0.047uF
0.Oo8uF
C408
C421
C415
C413,427
C409
C404
C406
C41J, 422, 428
170436
170437
170438
170439
170441
170440
170442
170443
Tantalum Capacitors
1uF/16V
C411
2.2"uF/16V
C426
I
I.C.s
IC401
IC402
IC501
IC502
IC503
Circuit Ref.
Transistors
0401,402,
504,506
0403
0404
Q405
0501
0502
0503,505
0801-803
r400225
1400226
LA7800
LA7830/UPC1378
STK7308
L78MG
UPC78M12
1400106
170444
170445
170446
1422278
Description
Part No.
KTC1815Y
170447
KTA950Y
2SC2271
2SD1397
2SD1207
2SD880Y
KTA1015Y
2SC3417
170448
170449
170450
170451
170452
170453
170454
Description
1400145
1400130
170842
L801
T401
T402
T501
1400148
170463
170464
170845
Switches
SW401
SW501
Coil 100uH
H. Drive 305Y001
Pin Cushion 1432MS
Switching Tx. 8142006
ISlide
Switch
Power On/Off Switch
Variable Resistors
VR401
Rot. 5000hm
VR402
S.F.5k
VR403
S.F.5k
VR404
S.F.2k
VR405
Rot. 20k
VR406,407
S.F. 1 k
VR801
S.F. 5k (R)
VR802
S.F. 5k (G)
VR803
S.F. 5k (B)
VR804
S.F. 5000hm (R)
S.F. 5000hm (B)
VR805
D.C. Jack
C.R.T. Socket
HPS0092-01-030
CTM644 VOLTAGES
28
170455
1400124
1422115
170456
1422116
170848
170458
170459
1400122
170460
1422114
Coils & Transformers
L401
Li nearity Coil 1431 MS
L501
Line Filter FKOB 160MH14
L502
Degauss Coil
J501
J801
1 - 6.35V DC
2 - 6.48V DC
3 - 0.32V DC
4 - OV DC
5 - OV DC
6 - 0.85V DC
7 - 3.21V DC
8 - 0.33V DC
9 - 0.93V DC
10 - 5.55V DC
11 - 0.96V DC
12-11.04VDC
13 - 0.89V DC
14 - 11.18V DC
15 - 12.43V DC
16-4.11VDC
--
Sil. IS2472T
Zen. RB11 EB
Rect. DFC1 OE
Sil. TVR 06K
Rect. BB-4
Rect. 20E1 0
Zen. RD 3.6FB
Rect. RGP 30J
Zen. SR2M
Rect. RU4A
Zen. GZA6.2Y
Miscellaneous
FB401
FB/LOPT 3714004
F501
Fuse 2A (T)
Degauss Element
TH501
ERP.F5BOM180H
C.R.T. 3701 B22-TC20
V001
IC401 . LA7800
Part No.
IC402 . LA7830/
UPC1378
1 - OV DC
2 - 12.74V DC
3 - 24.4V DC
4 - 0.84V DC
5 - OV DC
6 - 24.2V DC
7 - 2.5V DC
IC502 - LM78M6
1 - 18V DC
2 - OV DC
3 - 5.4V DC
4 - 5.0V DC
Q405 - 2501397
E - OV DC
B-0.1VDC
C - 98.8V DC
Q404· 2SC2271
E - OV DC
B - 0.3V DC
C - 34.1V DC
I
900101
170306
170315
1400227
1400227
1400230
1400035
170466
1400197
1400198
1400199
1400200
1400201
170467
1400253
1400195
170307
170844
170843
CTM644 CIRCUIT DIAGRAM
PCllOO3
MSOOt9B
,.
V.1IlLD
R411 VR405
•
Li
COOIO
a402
~F1i
~: ~~
i~~
~t;
i
11.2 005
L...-._.o-::1
SS"':"'~H:
ID )
\!:ll
Q40'
B.O
K""C1815
~8'5
\!:;l
B.O
~~~ ~
0
,j .,
~
1102
lib
B.8I<
21
@'2.5,
,~
-
B.4
f
,
1 8.9
0.47
B.S
OSC
]<-j~~1
3
4
0.3
~
,
~i:;
i~_
-
ir~fti
~!~
~ ~
«
e,
11
5.9
o
VER
.4-O.as
TVll-WOBK
OR DfOO58
~
,/21
&1 !
D408
L...-.
9-T;!
"6~': ~
11;
5
a
"''''
~!!
~
i iili
0
:
SYN: SEP
f
R"'?
t.l
@
~
2.liK
~
1fJIl.
l--
@
lD
h~
~~
41K
~!~;;~
·f
••
~~ ~
i!;a:: -
0
2OI<B
R412
'liK
,--
~I~ ~
@
0405
..81<
~:m
a409
-' _'00
II llj
C424
.. iii
;E -
llIlIVl!R
7
1.
9.9
R499
-}0.28
,aov
w,
,~f~Li
D402Lh
ROl1EB2
! ~ ~~.
~ ~ ll~i~
a"""
'l>(
a4a2
••
~l~
S ~
C4'S
T4O'
.-
jll
~~~
0.0
=.
Q404
iii
"
.
i§
!i
-
I
!i
,;,
~
~ ~
~ ~
~
0
005Y::;00'
JIlC),
~
~
'"
-
L......j
a
S
~ ~
i
8
§
l-J
....
5.S
VRBO'
~
~
6.4
134
~K)
III
lD
,;,
2SC3417 ~S.D
~i~ ~st-J
8.4
15K "
ReiD
i~
'00
''l2
&
~..f['~ }
2SC3417 """'B., ......
RB'2
16K 1.
CHASSIS SCHEMATIC DIAGRAM
1·3454
CAUTION'
sua; ll£5E PARTS MARKED ar &. ARE
O<ITICAl F'OR SAFETY , USE CJIE5
DESCRlaet> ON PARTS LIST lX,.Y.
ATTENTION • LES PIElES REPAREES PAR Ul.:t ETANT
0AN3EREUSES AN POINT IlE Y\£ SEl:lJlITE
N'UTIL1SER QlE C£U..ES ~ITES
NJTE' THI5 SCl£MATIC DIAGRAll IS TI£ LATEST AT 1>£ TIME
CF PRINTIN6 .NI) Sl..S...ECT TO 0fAN3E WlllDJT NJTlCE.
DANS LA N.:JrEN:l.AnH: DES PIECES..
29
3:>
C.R.T. P.C. BOARD
MAIN P.C. BOARD
CDOIO
11401
~7/flJ':'f·l~~
C441
Q401
•
lOOP
KTCI8/SY
Q40:{
KTA9fiO
W.
...=:'!t :~I. ~.
t®'
@J
CIlT
Q402
:404".. 330.
•
co
..,C437
.&~
.
;:J0llh
~C436
From
'~vJt
;:.!I
CDOO/
{kJ
6
From PC
R
G
5
(DIN Jack)
8
J
S~ C
PCBOO2
HSOOl7A
2
E
I
C0007
BGE75001
~
c::=:
J501 U2V Jack}
HEC0630- 01-010
CD004
From
PC
~.~~
Healer
C0005
@
TO CRT PCB
KTAIOISY
IG060402
KTCIBISY
TO CRT PCB
:va;, sw:jf
5
C0002
8332014A
c=::TI==
CD008
B30IOI4A
From
Degauss Coil
:J
BlacK
L502
gOl40013
31
32
INTERFACE CIRCUIT DIAGRAM
1C208-1
-2
-S
7
2
~...:,'~::-;?
~6
,. . .
IN)
,(2)
AIS
"'3
1.12
<S>
<5)
(Il>
All
(7)
Ala
~:~
<10>
Ja
..
1.7
IB
AS
oW
:
(18)
Al
AD
(17)
<IfI)
07
08
(lI!I>
<24>
(26)
00
<2'1)
ID
III
::
,.
IDOlS
+12\1
1o.,5,..--,;1......·---,
...-_-!..:i!2-1 p
5
7
~
a
I
74l.S2'1
!
"0.2
/}4,!~Si:----J--+---+..,.4:~S:-I>o< _
1J
-9';-
406
403
'
~_+_+_+_I_t_---::;.s...,l,
CD201
IV
U!ll
74CMO
U!lO
LCTJ1lIR
(II)
0.2
WISEEK
(97)--.!!0_-------j.3~"-l0I 5
(:~
ARI8
-'------'
12
1C2lD-9
lI-
AD
8
'/IX
ICll!04
11
_40015
Vl'P
(T*- lI!II2SI'- UlSl )
J
/
'--1-1-1-1-1-1-1-1-+-&0 Cif
S
4
..
<II
~
-
~~f-
=;i
.
!
..-.
I
-"0'--"'2...J-j 88_ ./}/
I
'----"
...-
a
LD
CD
~
:
;
I
I
...
I
II
~vco
12
A1S
Piii
II)
.
-
L- ~
~
'3 -1I'\b!-'L'..!5!!.0!!--+-+-+-J--J--J--J--J--J--J-....
o
---
II;i
e
......
~
.!L{, it INT
lI-..!L.l
""I(J(SKSK7J(IlJ(SJ(4J(SJe Eil/l« lJe !t(2Je_
a
IE
'----f-_...._+S......-'{O,,~'D.IoO<
IK
'14LS132
+-
d
r-1-__7_~
__-:0:..--4~8 5.0
lI-~'~DAD
~
~f-
--;;--_-+~~o
8
8 5.0" r
° ~~
IC2O&-3
IK
13
~::~
.~
8
~
'-
I~'I
(41)
<42>
J}-!!-9
--j-!JY~-=----'
@!t__. ! ! o - - - -.....
HH-+-+-H-l-++--!H-+-+----l--------+--l------------l-l-----+..-{5)AD
(33)
I2
°
)SIOS C2'1}__.!!0-----....J
RoWSTel'
1C211Hl
7.....
"132
ARlI
068W60004A
_'1.'
CI2M$)
4.1V(2MI)
(28)
5.0
.....+------+----!!o-......
-t:J;T)p:.II:....---'OL----+-+--+-----,
lJ'D'}SSAC
.7. _./'}-8=--_ _1-+_-<i'"~=_-----.l
10109-1
~
.t-r:1\ 9
o
r---l---+.....J:i-.-4~b=--_---'l.:l:!---+-+-~
H:201
o
....
--'.:!."-I_.....
~
° .!-
ui
4_
••
~l>-9--<l~---!!0 ...2 ! - - - h
.....__+0.2
\'1
9
~
-4
T '-----'"
I
II ~
, - -......+--+-I-...l.l-:S,----
(21)
(22)
D4
::
DI
iiiii
.~
J
~~J
4~1l
S
IJ
6 /p:..----:~---,
0.2
1C212-2
74l.S'14
lC2II-S
~~~
os
_
5.0
~I,o--......
II)
(12)
<IS>
<14>
<IS>
ARI4
4.6
l
IC2I1-1
-2
74l.S2'1
..... 1
5 ~
7
5.0
SIOS
II!'HTI2
.IT
19
a
.I2lI1
_IN
I.e.
soc::KST
I
087
I
08Il
IN:lEX
~D8S
~084
~083
<!
o
RfW>y
~- -
18
(l!MS')
.IT •
S
0
.IT
6.0
IS
s.o
9 082
~
lil
081
1'9)0
CLK
-ct7~
,
0
o
i
10<
1
0
PSI
ROO
~
0
~~
'1
j
...
liI M
<C
~ ~ ~
~
<3 g
!:: 1§ ..
'-__om
....'
_ _AS
0.2\5
I
8....llJ
5
N
cr:
Z
-;-
8! - ~ ..
r-----+-f";:;,...
~~~~~)-
14
4.8
'---
~
IC20S-1
..:.7=<LS09==--_--I
'-
+---__-'
O.
r--\:P SEFO
IC2ID-l
'14LS132
.---t-----+--<11) REFt:LK
l!{ff[t-
®®®®®®®®®®®®®
.;
;; ;;
d
;;
0
d
0
d
;;
PRE -8-
",
N
i:i! l'tl
'"..._~3(1'---~2:.--0~.2l2. ...--4:!.1-rr---.,.'j::,.l8!.-
..
~------f~
'"
=..3c<
.IT,1- - !217:. 0~.0~le! .o<,. .IT
~i
-~
,j,r-~202
068(,14080A
2 5 .:
CDI 8
ax!
_
S
4
IC209..1
74K:240
1=
RlC9211l
~
IC210-4
0
0
d
74LS132
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~
9I
~ ~ ~
8 I B ti
0
CXHlITlQI:
.
IC213
OJ
§ § ti
MAIH
ee
NO
SWtn:H
8EJD'(
11£
74l«:181P
peSl01
MC0009A
IS
51ftOB>
TO 1'tR<.
DISlIeT IS
l1li'
til
IN
•
DRI""'.
NOTE. nilS SO£MATIC 0 1 _ IS 11£ LA1EST AT 11£ TUE
IF PRINTINEl NO !lls.J!t:T TO 0lAN9E IInDJT IIII'ICE.
CHASSIS SCHEMATIC DIAGRAM
M208-01
1-3584
Note: See Page 21 for Electrical Parts List
33
34
DISC CONTROL CIRCUIT DIAGRAM
-
..
1 -
5.0
rv)
Oolll
laHl~
4
~
II)ICl891l
[~
5 ~ .. 6
"---
i
0
is
-
a;
WARNING: This Circuit Diagram
is for information only. During the
warranty period Service Agents
must return the Disc Drive Mechanism complete with PCB30001
for replacement.
iii
~
5.0
Q2
LN2t14
DR
DTA144'IK
:!
u ~•
~
'"5::
!!! ~
-'"
'"
R1B
SoIl
IClJI(~ ,..
Rt8
O
..--+-+----t--+"'.-'1',
<~~I ~~?SK
~~
,j,
'l.:J
-
91K-1ClJ1(
OD
FOC20'
--
EME-l50A
PClll
I
Ir
VR3Dl
I
I
I
I
I
~I
I
I
8tOl
lH!2f4 DR
~
8104 ..
1c:::2\0.a
TI
PlCt4lllK ~
'"
O.a
lLJ
DTCH4'IK
4.7
,~O
ClJI)ITlIIl : MAtH SlrllCH IS SlrlTOE)
Ill,
iii
READY
10 IIIRC.
AN)
11£ DISKETTE IS _
IJI DRIVE
~1
PIJI
III
2.4···l2lI
IS UlII
ACTIVE.
_l:S
~ I1
1Pl
C9
4?tP
lI-4?IP
HI. "ll.lIK
U2
1 sa...
I
HEAD
I
Jz
l
SlOE D
I
I
lH4llD2
1P11
CASSETTE CONTROL CIRCUIT DIAGRAM
IIIT&' THIS SCle4ATIC DIA8RAM IS 11£ LA'TEST AT TI£ TIJE
CF PRIHTIJlEI AN) !UI..B:T 10 CHANIlE nTIfJUT _ICE.
ATlBlTIIIl' LES PIEES REPNlI!ES _
1M .:h ETNIT
llANIlEREUSES IoN PD1NI' DE _
SEDIllTE
N" UTILISEIlIUi CIi.l.ES D6CRI'laS
DANS LA ID4 ElCl..A1Ue DES PIEES.
CMJTIIIl' SIIIE neE PARTS IWI<ED lI'f .:h
CRITICALPOR lW'E'IY. IJ9E IHlS
CESCRIIED III PARTS LIST CH-Y.
-.
Sym
1
2
3
4
5
6
7
8
9
10
MECHANISM
Description
i Head Assembly
Stepper Motor
Stepper Motor Rotation Bolt
Spindle Motor
Flywheel
Pulley
Read/Write Protect/Index/LED P.C.B.
Track 00 Sensor Assembly
Spring
Loading Unit
3
~
10
This drawing is for information only. During
the warranty period Service Agents must
return the Disc Drive Mechanism complete
with PCB30001 for replacement.
6
I
Fig. 6.
5
MECHANICAL REPLACEMENTS
Head Assembly
i) Remove 2 screws from F. panel and remove F. panel.
ii) Remove 4 screws from the control PCB.
iii) Disconnect plug from Stepper Motor.
iv) Disconnect plug from LED P.C.B.
v) Disconnect transistor from Spindle Motor.
vi) Disconnect Index Sensor from front of P.C.B.
vii) Raise P.C.B. from side opposite LED and remove plug from head.
viii) Control P.C.B. will now be free - remove.
ix) Remove 4 screws securing the Loading Unit to the chassis from the Flywheel side and remove
Loading Unit.
x) Remove spring and rod support screws.
xi) Gently slide the head off the rod.
xii) Replacement is reverse process.
After reassembly check alignment of Azimuth Burst/Track 00 Positioning.
Spindle Motor
i) Remove transistor fitled to Motor.
ii) Unplug CN5 from Control P.C.B.
iii) Remove Drive Belt.
iv) Undo 2 screws securing motor.
v) Replacement is reversal of removal.
vi) Adjust VR201 so Index frequency is 200 ± 2ms (See Fig. 5-1).
Stepper Motor
i) Remove Control P.C.B. as (1).
ii) Remove 2 securing screws for Stepper Motor Bracket.
iii) Stepper Motor can now be removed.
iv) After replacement index and positioning must be checked and amended as necessary.
37
TECHNICAL SPECIFICATION
LSI CHIPS:
Z80A
128K
48K
6845
AY·3·8912
8255
7653
processor running at 4MHz
bytes of RAM arranged in two 64K banks (over 41 K
available to user in BASIC, 61 K available TPA to
CP/M Plus)
bytes of ROM containing BASIC, the operating system
and disc extensions
CRT controller device
sound generator chip 3 voice, 8 octaves
parallel I/O device
floppy disc controller
DISPLAY SPECIFICATION:
Display Mode
Mode 1
No. of colours
4 from 27
Vertical dots
200
Horizontal dots
320
Horizontal characters
40
Mode 2
2 from 27
200
640
80
Mode 3
16 from 27
200
160
20
KEYBOARD:
74 Keys - qwerty style, numeric cluster, cursor and copy cursor,
return, enter, shift, caps, lock, tab, delete, clear, control.
CASSETTE HANDLING:
Write speed software selectable - 1 K baud or 2 K baud, read speed
automatically established by software. Motor on/off controlled by
software.
ADD-ON ABILITY:
Additional compact floppy disc drive system, type FD-1.
Centronics compatible printer.
Joystick(s).
Various peripherals including up to 252 additional 16K ROMs.
EXTERNAL SOCKETS:
PCB edge connectors for general purpose expansion and Centronics
parallel printer.
Disc drive 2 socket (Use DI-2 connecting lead).
9 Pin D-type socket for joystick (Amsoft type JY2).
6 Pin DIN Socket for
- RGB and sync
- Luminance + sync
5 Pin DIN socket for external cassette recorder. (Use CL 1 lead).
3.5mm stereo socket for stereo sound output.
5mm plug and lead to connect 12V (disc) power socket on the
monitor.
5mm socket for CPC6128 5v power supply (supplied exclusively
from monitor).
DIMENSIONS (mm):
w
Keyboard
CTM644
GT65
Joystick
Modulator
510
375
305
90
120
WEIGHTS (Kg):
Keyboard
CTM644
GT65
Joystick
Modulator
2.0
10.6
6.3
0.3
1.4
h
48
340
315
170
70
d
170
365
335
100
170
POWER SUPPLY:
Screen System: 240V AC 50Hz (keyboard and disc drive power
supplied by screen system).
CP/M usually assumes an 80 column screen is available. The
CPC6128's ability to present text in 80 column format is a prerequisite
for the majority of CP/M applications.
Disc System Specification:
The disc drive is a 3 inch system, conforming to the Hitachi!
Panasonic standard. The software is configured for a 12mS step
rate, and 30mS settling time.
The system is designed to control a maximum of 2 drives. A ROM
contains the extensions for AMSDOS and the machine dependent
elements of CP/M and Dr LOGO.
The ruggedly constructed 3 inch discs are usable on both sides,
each side is provided with a reusable write protect clip which is slid
into position as required.
AMSDOS & CP/M Plus
AMSDOS is a disc operating system which expands Locomotive
BASIC, adding additional commands to make full use of the disc files.
AMSDOS enables BASIC programs to access disc files in the same
manner as cassette files, in fact the same commands are used with
file names conforming to CP/M and CP/M Plus conventions.
AMSDOS and CP/M both share the same file structure and can read
and write each other's files. The Digital Research CP/M Plus
operating system is supplied with the CPC6128, permitting the user
to access the wealth of applications software written to run under
CP/M. In addition to the usual CP/M Plus utilities, additional
features have been included for the CPC6128.
Disc Organisation:
Both AMSDOS and CP/M Plus support two different disc formats:
System format, and DATA only format.
Format selection is automatic on disc access. Both formats use the
same framework, but have different sector configurations.
Common to all:
Single-sided, double density.
51 2 byte sector size.
40 tracks.
Sectors interleaved 2: 1.
SYSTEM format:
The most frequently used f6rmat, since CP/M 2.2 and CP/M Plus
may only be loaded from a system format disc. 2K is used for the
directory, and 9K reserved for the system.
9 sectors per track.
2 reserved tracks for CP/M.
169K byte file capacity.
DATA only format:
All the tracks are used to store data.
2K bytes reserved for the directory.
9 sectors per track.
No reserved tracks.
178K byte file capacity.
The CPC6128 is compatible with programs developed for Amstrad
CP/M 2.2 and will run Amstrad CP/M 2.2 discs. Programs developed
specifically for CP/M Plus with GSX will not run on Amstrad CP/M
2.2. The term CP/M Plus is synonymous with CP/M 3.0.
Either side 01an AMSTRAD CP/M Plus or AMSDOS disc may be
accessed by the disc controller, depending on which way round the
disc is inserted.
Please note that while every care has been taken to ensure
compatibility with existing CP/M software, some packages available
make use of undocumented features of the CP/M operating system,
and these may not be supported by the CPC6128 implementation.
Protected cassette files may not be occupied on disc, and care
should be taken to observe the copyright conditions of any software
when transfering programmes between cassette and disc.
In keeping with our policy of continually improving our service, and
the technical quality of our products, we reserve the right to change
component types, manufacturers, sources of supply or technical
specification at any time.
Keyboard/computer unit, Colour Monitor, Monochrome MonitorDesigned in UK., Made in Korea.
Joystick - Designed in UK., Made in Taiwan.
Power Supply/Modulator - Designed in UK., Made in UK.
Software - Written in UK. and US.A., Made in Korea and t'he UK.
CP/M Plus, CP/M and Dr Logo are trade marks of Digital Research Inc.
AMSTRAD, AMSOFT, AMSDOS, CPC464, and CPC6128 are trademarks
of AMSTRAD Consumer Electronics PLe.
AMSTRAD CONSUMER ELECTRONICS pic.,
Brentwood House, 169 Kings Road,
Brentwood, Essex CM 14 4EF.
Telephone: (0277) 228888