Sony HCD-XG55 Service Manual ▷ View online
HCD-XG55
33
33
7-5.
SCHEMATIC DIAGRAM – CD MOTOR Section –
•
See page 53 for IC Block Diagram.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
no mark : CD STOP
B
MAIN BOARD
CN412
(Page 38)
4.8
4.8
4.8
4.8
LED DRIVE
TABLE MOTOR DRIVER
DISC TABLE SENSOR
TRAY
HCD-XG55
34
34
7-6.
PRINTED WIRING BOARD – AUDIO Board –
•
See page 25 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
IC601
B-2
IC602
B-3
IC611
B-8
Q621
B-5
Q622
B-5
Q623
B-6
IC601
IC602
IC611
AUDIO BOARD
1
4
8
5
9
1
6
5
7
4
3
1
1
2
3
4
4
5
6
7
6
7
2
1
3
6
4
E
E
E
1
4
8
5
1-675-753-
(24)
24
C
MAIN BOARD
CN303
L-CH
R-CH
– B DECK –
HPRE101
RECORD/PLAYBACK
ERASE
2
3
1
4
L-CH
R-CH
– A DECK –
HP101
(PLAYBACK)
1
2
3
4
4
(CHASSIS)
(Page 40)
A
B
C
1
2
3
4
5
6
7
8
HCD-XG55
35
35
7-7.
SCHEMATIC DIAGRAM – AUDIO Board –
•
See page 53 for IC Block Diagram.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TAPE PLAY
(
no mark : TAPE PLAY
(
) : RECORD
C
MAIN BOARD
CN303
(Page 38)
PB LEVEL (L)
(DECK A)
PB LEVEL (L)
(DECK B)
REC BIAS (L)
(DECK B)
REC BIAS (R)
(DECK B)
–7
–7
6.9
6.9
–6.5
–6.5
–6.5
–6.5 (–7.2)
(PALYBACK)
PB EQ AMP
(DECK A)
PB EQ AMP
(DECK B)
SWITCHING
T621
BIAS OSC
REC BIAS
NC
A+7.5V
APB-LCH
APB-RCH
AGND
BPB-LCH
BPB-RCH
A–7.5V
–VBIAS (–7.5V)
+VBIAS (+7.5V)
BREC-RCH
BREC-LCH
TC-HEAD-GND
R492 1.5K
R491 820
R482 1.5K
R481 820
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
HCD-XG55
36
36
7-8.
PRINTED WIRING BOARD – LEAF SW Board –
•
See page 25 for Circuit Boards Location.
7-9.
SCHEMATIC DIAGRAM – LEAF SW Board –
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TAPE PLAY (DECK A)
(
no mark : TAPE PLAY (DECK A)
(
) : TAPE PLAY (DECK B)
∗
: Impossible to measure
IC1001
IC1002
DECK A
PLUNGER
DECK B
PLUNGER
(DECK A PLAY)
(DECK A HALF)
(DECK A 120/70)
(DECK A REC)
MAIN BOARD
CN304
(DECK B HALF)
(DECK B PLAY)
(DECK B 120/70)
(DECK B REC)
11
11
D
4
1
2
3
4
1
2
3
(
)
1-676-219-
(Page 40)
D
MAIN BOARD
CN304
(Page 38)
*
(3.7)
*
4.5
( )
DECK B
PLUNGER
DECK A
PLUNGER
(CAPSTAN)
(DECK A 120/70)
(DECK A HALF)
(DECK A REC)
(DECK B HALF)
(DECK B REC)
(DECK B 120/70)
ROTATION DETECT SENSOR
(DECK A)
ROTATION DETECT
SENSOR (DECK B)
(DECK A PLAY)
(DECK B PLAY)
CONTROL SWITCH
CAPM–
CAPM+
CAPM–H/L
A–TRGM
TRGM–GND
B–TRGM
A–SHUT
DGND
A–HALF
+5V
A–120/70
B–SHUT
A–PLAY
B–HALF / REC–A / REC–B
B–120/70
B–PALY
NC
7.5k
IC1001
IC1002
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