Sanyo DWM-1000 Service Manual

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IC BLOCK DAIGRAM & DESCRIPTION
IC470 STK402-230 (3 Channel AF Power Amplifier)
- POWER section -
1
2
3
4
567
89
CH1 IN
Pre. +VCC
CH1 +VE
CH1 - VE
- V
CC
10
11 12
13
14
15 16
17
18
19
CH1 NF
BIAAS
+ V
CC
NC
CH2 +VE
CH2 - VE
Pre - V
CC
SUB GND.
CH2 NF
CH2 IN
CH3 IN
CH3 NF
CH3 +VE CH3 - VE
IC491,493 PQ1CZ31H2ZP (Chopper Regulater)
REF
V
Error Amp.
PWM
Comp.
+
-
+
-
12
5
4
3
Overcurrent
detection
circuit
Overheat
detection
circuit
COM
V
IN V OUT
ON/OFF
Oadj
Oscillation
circuit
ON/OFF
Circuit
Constant-
voltage
circuit
Q
R
S
IC492 NJM7805FA, KIA7805API (Regulater)
123
1. INPUT
2. COMMON
3. OUTPUT
- PRE-AMP section -
IC450 LC75342M (2 Band Equalizer)
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CCB
INTERFACE
CONTROL
CIRCUIT
15
14
16
17
18
19
20
21 22 24 25 2623
10 9 7 6 58
11
L4
L3
L2
L1
NC
NC
R1
R2
R3
R4
RSELO RIN RTRE RBASS1 RBASS2 ROUT
LSELO LIN LTRE LBASS1 LBASS2 LOUT
TEST
V
SS
CE
DI
CL
V
DD
Vref
NC
12
13
1
2
30
29
28
27
4
3
LVref
RVref
IC451 LA2615 (Surround Signal Processor)
P16 P15 P14 P13 P12 P11 P10 P9
P1 P2 P3 P4 P5 P6 P7 P8
ANALOG
SURROUND
ATT LEVEL
ON/OFF
VREF
A
A
B
B
SW
SW
Vcc
CONT1 CONT2 CONT3 GND HFFC VREF L-IN R-IN
GCR GLR POG LPFD NC VCC L-OUT R-OUT
IC452, 453 KIA4558S (Operational Amplifier)
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V
CC
V
CC
AB
OUT A OUT B
- IN A
+ IN B
- IN B
+ IN A
V
EE

Sanyo DWM-1000 Specifications

General

Brand	Sanyo
Model	DWM-1000
Category	Home Theater System
Language	English