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7-12. SCHEMATIC DIAGRAM – AUDIO Board – •
(PALYBACK)
6.9
REC BIAS (R)
(DECK B)
See page 49 for IC Block Diagram.
PB EQ AMP
(DECK A)
PB LEVEL (L)
(DECK A)
–7
PB EQ AMP
(DECK B)
PB LEVEL (L)
(DECK B)
–7
SWITCHING
REC BIAS (L)
(DECK B)
REC BIAS
–6.5
6.9
–6.5
–6.5 (–7.2)
T621
BIAS OSC
–6.5
R492 1.5K
R491 820
R482 1.5K
R481 820
29
29
HCD-XG100AV/XG900AV
NC
A+7.5V
APB-LCH
APB-RCH
AGND
BPB-LCH
BPB-RCH
C
A–7.5V
MAIN BOARD
(2/3)
CN303
–VBIAS (–7.5V)
(Page 32)
+VBIAS (+7.5V)
BREC-RCH
BREC-LCH
TC-HEAD-GND
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TAPE PLAY
(
) : RECORD
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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