Sony HCD-GV6 / HCD-GV8 / LBT-GV6 / LBT-GV8 Service Manual ▷ View online
HCD-GV6/GV8
33
33
C
MAIN BOARD
(2/3)
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
7-15. SCHEMATIC DIAGRAM – AUDIO Board –
•
See page 51 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 36)
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
HCD-GV6/GV8
34
34
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-
7-16. PRINTED WIRING BOARD – LEAF SW Board –
•
See page 23 for Circuit Boards Location.
D
MAIN BOARD
(2/3)
CN304
*
(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
7-17. 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
(Page 38)
(Page 36)
HCD-GV6/GV8
35
35
7-18. SCHEMATIC DIAGRAM – MAIN Board (1/3) –
•
See page 51 for IC Block Diagram.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
(
no mark : TUNER (FM/AM)
(
) : VIDEO
(Page 26)
(Page 43)
(Page 37)
(Page 36)
(Page 36)
(Page 36)
(Page 37)
HCD-GV6/GV8
36
36
W
7-19. SCHEMATIC DIAGRAM – MAIN Board (2/3) –
•
See page 39 for Waveforms.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : TUNER (FM/AM)
(
no mark : TUNER (FM/AM)
(
) : CD PLAY
<
> : VIDEO
{
} : TAPE PLAY (DECK A)
[
] : TAPE PLAY (DECK B)
〈〈
〉〉
: RECORD
∗
: Impossible to measure
(Page 35)
(Page 33)
(Page 34)
(Page 37)
(Page 35)
(Page 37)
(Page 35)
(Page 37)
(Page 45)
(Page 26)
(Page 31)
(Page 37)
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