Sanyo DWM-1000, Руководство по обслуживанию

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IC BLOCK DAIGRAM & DESCRIPTION
IC470 STK402-230 (3 Channel AF Power Amplifier)
- POWER section -
1 2
3
4
5 6 7 8 9
CH1 IN
Pre. +V
CC
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.
+
-
+
-
1 2
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)
1 2 3
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 26 23
10 9 7 6 5 8
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)
1 2 3 4 5 6 7 8 9
V
CC
V
CC
A B
OUT
A
OUT
B
- IN
A
+ IN B
- IN B
+ IN
A
V
EE