Sony HCD-XG700 / HCD-XG80 Service Manual ▷ View online
HCD-XG80/XG700
26
26
B
MAIN BOARD
CN412
7-8.
PRINTED WIRING BOARDS – CD MOTOR Section –
•
See page 23 for Circuit Boards Location.
(Page 34)
HCD-XG80/XG700
27
27
7-9.
SCHEMATIC DIAGRAM – CD MOTOR Section –
•
See page 47 for IC Block Diagram.
B
MAIN BOARD
CN412
4.8
4.8
4.8
4.8
LED DRIVE
TABLE MOTOR DRIVER
DISC TABLE SENSOR
TRAY
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
no mark : CD STOP
(Page 32)
HCD-XG80/XG700
28
28
7-10. PRINTED WIRING BOARD – AUDIO Board –
•
See page 23 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
(Page 34)
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)
A
B
C
1
2
3
4
5
6
7
8
HCD-XG80/XG700
29
29
7-11. SCHEMATIC DIAGRAM – AUDIO Board –
•
See page 47 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
(Page 32)
C
MAIN BOARD
CN303
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.
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