Sony HCD-GRX9900, Service Manual

Page: 29 / 74

HCD-GRX9900/RXD9
– 39 – – 40 –
The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
7-11. SCHEMATIC DIAGRAM – AUDIO Board – •
See page 68 for IC Block Diagram.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAY
(
) : RECORD
PB LEVEL (L)
(DECK A)
PB LEVEL (R)
(DECK A)
PB LEVEL (L)
(DECK B)
PB LEVEL (R)
(DECK B)
PB EQ AMP
(DECK A)
PB EQ AMP
(DECK B)
SWITCHING
REC BIAS (L)
(DECK B)
REC BIAS (R)
(DECK B)
BIAS OSC
REC BIAS
-6.8
(PLAYBACK)
D (Page 49)