Sony HCD-GZR88D Service Manual page 71

IC182 SN74LV4053APWR (MAIN Board (2/3))
16 15 14 13 12
IN
OUT
C
IN
OUT
C
C
OUT
IN
C
OUT
C IN
OUT
IN
1 2 3 4
IC921 SI-8001FFEK (MAIN Board (3/3))
IC931 SI-8008TFEK (MAIN Board (3/3))
IC951 SI-8001FFEK (MAIN Board (3/3))
OVERCURRENT
ON/OFF
PREG
PROTECTION
SOFT
START
OSCILLATOR
COMPARATOR
–
+
–
+
ERROR AMP
1
IC720 BU9253FS-E2 (MIC Board)
16 15 14 13
A/D
OSC
COUNTER SRAM
D/A
1 2 3 4
11 10
C
OUT
IN
5 6 7
LATCH
RESET
&
DRIVER
THERMAL
PROTECTION
REFERENCE
VOLTAGE
2 3 4 5
12 11 10 9
MIX
5 6 7 8
HCD-GZR88D/GZR99D
9
8
71