HTC-NX1

HTC-NX1
SERVICE MANUAL
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
HTC-NX1 is the CD player and Tape
Deck section in MHC-NX1/NX3AV.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism
CD
Section
Tape Deck
Section
HCD-MD555
CD Mechanism Type
CDM53D-K1BD33
Base Unit Name Type
BU-K1BD33
Optical Pick-up Name
KSM-213BFN-C2NP
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
HCD-GRX7
TCM-230AWR2
SPECIFICATIONS
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
HTC-NX1
7-3.
SCHEMATIC DIAGRAM – BD Board –
• See page 32 for Waveforms.
• See page 32 for IC Block Diagrams.
(Page 29)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
21
21
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
HTC-NX1
7-5.
SCHEMATIC DIAGRAM – CD MOTOR/SENSOR Section –
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
• See page 33 for IC Block Diagram.
(Page 29)
(Page 29)
23
23
HTC-NX1
7-7.
SCHEMATIC DIAGRAM – AUDIO Board –
• See page 33 for IC Block Diagram.
PB EQ AMP
(DECK A)
(PLAYBACK)
PB LEVEL (L)
(DECK A)
PB LEVEL (R)
(DECK A)
PB EQ AMP
(DECK B)
PB LEVEL (L)
(DECK B)
NC
A +7.5V
PB LEVEL (R)
(DECK B)
APB–LCH
APB–RCH
AGND
BPB–LCH
BPB–RCH
A –7.5V
D
(Page 28)
–VBIAS (–7.5V)
+VBIAS (+7.5V)
B–REC–RCH
B–REC–LCH
TC–HEAD–GND
SWITCHING
REC BIAS (R)
(DECK B)
REC BIAS (L)
(DECK B)
REC BIAS
-6.8
BIAS OSC
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAYBACK
(
) : RECORD
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
25
25
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
HTC-NX1
7-8. PRINTED WIRING BOARD – LEAF SW Board –
DECK A
PLUNGER
4
(
• See page 19 for Circuit Boards Location.
DECK B
PLUNGER
)
3
4
3
1
2
1
2
(DECK B 120/70)
(DECK A PLAY)
(DECK B REC)
(DECK B PLAY)
(DECK B HALF)
21
05
(DECK A HALF)
(DECK A 120/70)
21
(DECK A REC)
L
(Page 27)
7-9. SCHEMATIC DIAGRAM – LEAF SW Board –
CONTROL SWITCH
(CAPSTAN)
DECK B
PLUNGER
DECK A
PLUNGER
ROTATION DETECT SENSOR
(DECK A)
CAPM–
CAPM+
(DECK A 120/70)
CAPM–H/L
ROTATION DETECT
SENSOR (DECK B)
A–TRGM
TRGM–GND
(DECK A HALF)
B–TRGM
A–SHUT
DGND
(DECK A REC)
A–HALF
+5V
A–120/70
(DECK B HALF)
B–SHUT
A PLAY
B–HALF / REC–A / REC–B
(DECK B REC)
B–120/70
B PALY
NC
(DECK B 120/70)
(DECK A PLAY)
(DECK B PLAY)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAYBACK
(
) : RECORD
: Impossible to measure
∗
26
26
E
(Page 28)
HTC-NX1
7-11. SCHEMATIC DIAGRAM – MAIN Board (1/2) –
(Page 25)
(Page 26)
(Page 29)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
(
) : TAPE PLAYBACK (DECK A)
[
] : TAPE PLAYBACK (DECK B)
〈〈
〉〉 : RECORD
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
Les composants identifiés par une marque 0 sont
critiques pour la sécurité. Ne les remplacer que
par une pièce portant le numéro spécifié.
28
28
7-12. SCHEMATIC DIAGRAM – MAIN Board (2/2) –
HTC-NX1
• See page 32 for Waveform.
(Page 28)
(Page 31)
(Page 23)
(Page 23)
(Page 31)
(Page 31)
(Page 21)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
(
) : TAPE PLAYBACK (DECK A)
29
29
[
〈〈
∗
] : TAPE PLAYBACK (DECK B)
〉〉 : RECORD
: Impossible to measure
HTC-NX1
7-14. SCHEMATIC DIAGRAM – PANEL Section –
(Page 29)
(Page 29)
(Page 29)
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
31
31
• Waveforms
• IC Block Diagrams
3 Vp-p
PCO
FILI
FILO
CLTV
AVSS3
RFAC
BIAS
ASYI
ASYO
AVDD0
IGEN
AVSS0
ADIO
RFDC
CE
TE
60
59 58 57
56 55 54 53
52
51 50 49 48
47
46 45
44
43 42 41
1.9 Vp-p
DIGITAL
OUT
LRCK 61
16 MHz
16.9344 MHz
PCMD 62
D/A
INTERFACE
INTERNAL BUS
Approx.
1.2 Vp-p
1 IC101 qd (XOUT)
VDD
VSS
AVDD3
– BD Board –
IC101 CXD2587Q
– MAIN Board –
5 IC101 yh (XTAI)
1 IC103 qh (RF O) (CD Play Mode)
DOUT
– BD Board –
ERROR
CORRECTOR
DIGITAL
PLL
16K
RAM
40 SE
39 FE
38 VC
ASYMMETRY
CORRECTION
OPERATIONAL
AMPLIFIER
ANALOG SWITCH
EFM
DEMODULATOR
A/D
CONVERTER
BCK 63
EMPH 64
6 IC101 qg (WFCK)
2 IC101 ra (TE) (CD Play Mode)
XVDD 65
Approx.
180 mVp-p
XTAI
XTAO
XVSS
AVDD1
AOUT1
AIN1
5 Vp-p
66
67
68
69
70
71
TIMING
LOGIC
CLOCK
GENERATOR
SERVO DSP
LOUT1 72
PWM
AVSS1 73
AVSS2 74
138 µs
LOUT2 75
PWM
3rd ORDER
NOISE SHAPER
3 IC101 el (FE) (CD Play Mode)
OVER SAMPLING
DIGITAL FILTER
AIN2 76
AOUT2 77
AVDD2 78
RMUT 79
LMUT 80
Approx.
280 mVp-p
SUBCODE
PROCESSOR
FOCUS PWM
GENERATOR
TRACKING
SERVO
TRACKING
PWM GENERATOR
SLED
SERVO
SLED PWM
GENERATOR
5 Vp-p
230 ns
32
32
33
32
31
30
29
28
FRDR
FFDR
TRDR
TFDR
SRDR
SFDR
27 SSTP
SERVO
INTERFACE
SERVO AUTO
SEQUENCER
SERIAL IN
INTERFACE
CPU
INTERFACE
4 IC101 qj (XPCK)
PWM GENERATOR
FOCUS
SERVO
37 XTSL
36 TES1
35 TEST
34 VSS
DIGITAL
CLV
26 MDP
25 LOCK
MIRR, DFCT,
FOK
DETECTOR
24 FOK
23 DFCT
22 MIRR
5 6 7 8
9 10 11 12 13 14 15 16 17 18 19 20
XRST
SYSM
DATA
XLAT
CLOK
SENS
SCLK
VDD
ATSK
C2PO
SCOR
4
WFCK
XUGF
XPCK
GFS
3
SPOA
SPOB
XLON
1 2
SQSO
SQCK
21 COUT
IC103
CXA2568M-T6
VCC
HOLD 1
24 VCC
VCC
APC PD AMP
+
–
23 LC/PD
APC LD AMP
VEE
22 LD ON
+
–
+
–
+
–
21 HOLD SW
20 AGC CONT
VEE
AGC VTH 2
50µA
LD 3
VCC
+
–
PD 4
19 RF BOT
VC
+
–
+
–
+
–
VC
A 5
+
–
B 6
VEE
18 RFTC
RF SUMMING AMP
C 7
+
–
VC
RF EQ AMP
VC
17 RF I
+
–
16 RF O
D 8
15 RFE
VC
FOCUS ERROR AMP
VEE
VEE 9
+
–
14 FE
VC
VC
+
–
F 10
–
+
–
+
E 11
VC
VC
VC BUFFER
VC 12
13 TE
TRACKING
ERROR AMP
VC
VEE
+
–
VCC
VC
– CLAMP MOTOR/LOAD MOTOR Board –
IC701 M54641L (CLAMP MOTOR Board)
IC702 M54641L (LOAD MOTOR Board)
– AUDIO Board –
IC602 µPC1330HA
VCC 1
OUT2 2
INVERTER
REG
8 VCC
IN1 3
INPUT
AMP.
CONTROL
COMPARATER
POWER AMP.
1
INPUT
AMP.
7 OUT1
2
SW R1 GND
3
4
SW P1 CONT
5
6
GND
VCC
7
8
SW P2 GND
9
SW R2
POWER AMP.
GND 4
6 IN2
5 REFERENCE
33