Sanyo DC-PT80 Service Manual page 23

IC BLOCK DIAGRAM & DESCRIPTION
IC441 LC75348M (Electric Volume)
L4
11
L3
12
L2
13
L1
14
NC 15
NC
16
R1 17
R2
18
R3
19
R4
20
IC480 SI-8050(Switching Regulator)
Vin
1
INTERNAL
POWER
OSC,
GENERATOR
COMPA-
RATOR
5 3
S.S GND
LSELO LIN LTRE
10 9 8
MULTIPLEXER
CONTROL
CIRCUIT
MULTIPLEXER
21 22 23
RSELO RIN RTRE
OVERCURRENT
PROTECTOR
RESET
LATCH
&
DRIVER
OVERHEAT
PROTECTOR
ERROR
AMP
VOLTAGE
REFERENCE
LBASS1 LBASS2
7 6
LVref
ZERO
CROSSDET
CCB
LOGIC
INTERFACE
CIRCUIT
ZERO
RVref
CROSSDET
LOGIC
CIRCUIT
24 25
RBASS1 RBASS2
2 SWOut
1 5
3
2 4
4 Vos 1 . V i n
2 . SWOut
3 . GND
4 . Vos
5 . S. S
- 22 -
LOUT
5
4 TEST
3
VSS
2 CE
1
DI
30 CL
29 VDD
28 Vref
27 TIM
26
ROUT