Sony HAP-S1 Service Manual page 85

– U-COM Board –
IC5004 BU4229F-TR
GND 1
VREF
+
–
VDD 2
IC5005 TC74VHC4052AFT (EK)
0Y 1 O/I I/O
C
2Y 2 O/I I/O
C
Y-COM 3
3Y 4 O/I I/O
C
1Y 5 O/I I/O
C
INH 6
GND 7
GND 8
– DCDC Board –
IC2402 – 2404 RT7256ALZSP
VA
BOOT 1
VIN 2
CURRENT
SENSE
AMPLIFIER
+
Q S
SW 3
Q R
GND 4
4 VOUT
3 CT
I/O O/I
C
I/O O/I
C
I/O O/I
C
I/O O/I
C
OSCILLATOR
REGULATOR
SLOPE
COMP
FOLDBACK
CONTROL
0.4V
+
UV
+
COMPARATOR
CURRENT
COMPARATOR
0.8V
+
+
EA
16 VCC
15 2X
14 1X
13 X-COM
12 0X
11 3X
10 A
9 B
VCC
INTERNAL
VA VCC
8 SS
SHUTDOWN
COMPARATOR
1.2V
+
7 EN
6 N.C.
+
2.5V
LOCKOUT
COMPARATOR
5 FB
HAP-S1
85