Sony XM-404EQX, Service Manual

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22 21 20 19 18 17 16 15 14 13 12
1 2 3 4 5 6 7 8 9 10 11
D4 D3 D2 D1 O6 O5 O4 O3 O2 O1 VCC
GND GND
OSC
H.C
MUTE
AC/DC
DC IN
CR2
AC2 IN
CR1
AC1 IN
PEAK HOLD LOGIC
COMPARATOR
SWITCHER
DRIVER
VREF. I/N
OSC
AMP AMP
INPUT
INTERFACE
CLOCK
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8
OSC
REF. REG.
ERROR
ERROR
0.1V
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• IC Block Diagrams
IC901 µPC494GS
IC802 BA6820F