Panasonic SB-WA840EB Service Manual ▷ View online
(All schematic diagrams may be modified at any time with the
development of the new technology)
Note:
· The voltage value and waveforms are the reference voltage
development of the new technology)
Note:
· The voltage value and waveforms are the reference voltage
of this unit measured by DC electronic voltmeter (high
impedance) and oscilloscope on the basis of chassis.
Accordingly, there may arise some error in voltage values
and waveforms depending upon the internal impedance of
the tester or the measuring unit.
impedance) and oscilloscope on the basis of chassis.
Accordingly, there may arise some error in voltage values
and waveforms depending upon the internal impedance of
the tester or the measuring unit.
· Importance safety notice :
Components
identified
by
mark
have
special
characteristic s important for safety. Furthermore, special
parts which have purposes of fire-retardant (resistors), high-
quality sound (capacitors), low-noise (resistors), etc. are
used. When replacing any of components, be sure to use
only manufacturer´s specified parts shown in the parts list.
parts which have purposes of fire-retardant (resistors), high-
quality sound (capacitors), low-noise (resistors), etc. are
used. When replacing any of components, be sure to use
only manufacturer´s specified parts shown in the parts list.
Caution !
IC, LSI and VLSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
· Cover the parts boxes made of plastics with aluminium foil.
· Put a conductive mat on the work table.
· Ground the soldering iron.
· Do not touch the pins of IC, LSI or VLSI with fingers directly.
IC, LSI and VLSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during
repair.
· Cover the parts boxes made of plastics with aluminium foil.
· Put a conductive mat on the work table.
· Ground the soldering iron.
· Do not touch the pins of IC, LSI or VLSI with fingers directly.
10 Notes of Schematic Diagram
17
SB-WA840EB
11 Schematic Diagram
11.1. Power Circuit
R501
4.7K
CN501
CN507
D502
D501
Q501
Q502
R546
1K
R504
15K
D501-D502
B0JAPG000019
E501
K4CZ01000027
Q520
B1GCCFJJ0015
INTERFACE SWITCH
IC501
AC1
DC_DET
AC2
SYS6V
HP_CNT
D.GND
FL
SUB+B
A.GND
A.GND
FR
SL
A.GND
SR
C
A.GND
SW
A.GND
PCONT
SYNC
FL
AC2
FL
AC1
R502
4.7K
R506
15K
R505
15K
R503
15K
FLin
IN GND
FRin
SUBin
Cin
-VD
+VD
SRin
SLin
RELA
Y
-Di SENS
+Di SENS
IH DET
DISP HMUT
SL_O
SR_O
GND
AC IN
C_O
-VCC LOW
+VCC LOW
SUB_O
-VCC HI
+VCC HI
FR_O
FL_O
26
25
24
23
22
21
20 19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C501
1000P
C502 1000P
C503
1000P
C506 1000P
C505 1000P
R513
56K
C507 18P
C508 18P
R514 56K
R516 56K
C510 22P
R515 56K
C509 22P
R517 56K
C511 22P
R518 56K
C512 22P
R509
4.7K
R510 4.7K
R507
3.9K
R511
15K
R512
15K
R508
3.9K
C516
0.01
C515
0.01
C517
0.01
R402
1K
Q503
R532
4.7K
R523 120K
R524
120K
R526
120K
R527
120K
C513
0.047
R519 820K
R530 1
R531 1
R521
10K
R522
27K
R545
220K
Q506
B1GCCFJJ0015
INTERFACE SWITCH
Q505
B1AACF000089
SWITCH
Q501-Q502
B1AACF000089
SWITCH
Q503
B1AACF000089
SWITCH
IC501
RSN311W64D-P
POWER HIC
C551
0.01
+
-
R525
150K
D558,D559
B0AACK000004
D555
B0AACK000004
D562
B0AACK000004
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
2
4
6
8
9
7
5
3
1
SCHEMATIC DIAGRAM-1
POWER CIRCUIT
: +B SIGNAL LINE
: MAIN SIGNAL LINE
: -B SIGNAL LINE
TO FAN
TO
MAIN CIRCUIT
(JK2000) OF
SA-HT840EB-S
R583
100
R584
47K
D559
D558
R582
220K
C576
50V 10P
C577
16V 10
R603
10K
C647
6.3V 470
D560
B0AACK000004
R606 22
D557
B0EAKM0001
17
C575
0.01
Q555
Q555
2SD0592ARA
FAN MOTOR DRIVE
Q556
B1ACCF000063
FAN MOTOR DRIVE
Q554
B1ACCF000063
FAN MOTOR DRIVE
Q554
C574
0.01
D556
B0BA01100004
C570
25V 330
R564
220K
R563
1K
R602
4.7K
Q552
B1ACCF000063
FAN MOTOR DRIVE
Q553
2SD0592ARA
FAN MOTOR DRIVE
Q552
R559
10K
R558
100K
C578
0.01
C579
0.01
R604
2.2M
R562
4.7K
R581
6.8K
Q553
Q557
C580
50V 10
R529
22K
Q556
R520 22K
C514
6.3V100
R528 150K
Fan Control
D508
B0AACK000004
1
2
Q557
2SD0592ARA
FAN MOTOR DRIVE
C504 1000P
D503
D503
MA2C700A0F
D504
B0AACK000004
C529 0.1
R549 3.9K
R547
390K
C534
50V33
R548
330K
18
SB-WA840EB
CN506
JK501
JK502
CN503
CP502
D564
D566
D563
D565
D510
B0BA5R600016
D509
B0BA5R100013
D563-D566
B0BA01900005
E500
K4CZ01000027
Q511
B1BACG000036
VOLTAGE REGULATOR
SUB WOOFFER
SRRch
CENTER
C518
0.047
R533
10
R534
10
C519
0.047
R577
1.5K
C533
1000P
C532
1000P
C531
1000P
C530
1000P
C550
0.01
C547
100V4700
C546
100V3300
C545
0.1
R570
10K
C549
100V3300
C548
100V4700
C554
0.1
C553
0.1
C544
50V100
R568
150
C543
1000P
R569
1.8K
C560
50V10
R567
1.5K
C520
0.047
C521
0.047
C522
0.047
C523
0.047
R535
10
R536
10
R537
10
R538
10
R609
1.5K
D561
B0BA01
100004
C572
50V100
R560
150
C573
1000P
R561
3.9K
D509
SRLch
FRch
FLch
PCONT
GND
SYNC
SYS6V
R571
1.8K
C569
0.047
R621 10
L501
G0AR76Y00001
R622 10
R625 10
R624 10
R623 10
L502
G0AR76Y00001
FP1 5A
L505
G0AR76Y00001
L503
G0AR76Y00001
L504
G0AR76Y00001
SUB+B
HELP
2
4
6
7
5
3
1
TO
AC INLET
CIRCUIT
(CN502) ON
SCHEMATIC
DIAGRAM-3
SCHEMATIC DIAGRAM-2
POWER CIRCUIT
: +B SIGNAL LINE
: MAIN SIGNAL LINE
: -B SIGNAL LINE
-
-
-
1
2
3
4
5
6
TO
TRANSFORMER
CIRCUIT
(H503/W503) ON
SCHEMATIC
DIAGRAM-3
+
+
+
+
+
-
-
14
3
12
11
10
2
4
6
8
9
7
5
13
1
15
3
1
2
4
R565 3.9K
Q512
B1BCCG000021
VOLTAGE REGULATOR
R610
4.7
R600
47K
R601
47K
D599 B0FBAM000009
D598 B0FBAM000009
D597 B0FBAM000009
FP1
K5G502AA0002
3
1
2
4
C525
0.01
C524
0.01
C526
0.1
C527
0.1
C528
0.047
19
SB-WA840EB
11.2. Transformer Circuit and AC Inlet Circuit
F1
250V 2A
C555
35V4.7
CN502
FC502
FC501
D500
R589
10K
D500
B0AACK000004
Q516
B1GACFJJ0016
SYNC SWITCH
PCONT
D.GND
SYNC
SYS6V
R578
10K
R580
22
R587
2.7K
C556
0.01
C557
16V22
C559
0.01
R579
3.3K
Q517
B1BACG000036
VOLTAGE REGULATOR
Q515
B1AACF000089
DC DET SWITCH
JK500
W1
R401
220K
R590
1K
Q515
Q519
B1AACF000089
DCDET SWITCH
D527~D530
B0EAKM000122
D525
B0BA6R600008
T501
G4C8AHK00006
T502
G4C2AAJ00005
H503
/W503
C558
16V1000
W2
L500
ELF15N035AN
SUB+B
HELP
2
4
6
7
5
3
1
R588
150
D528
RLY501
K6B1AEA00003
3
4
1
2
Z501
ERZV10V511CS
D527
D530
D529
SCHEMATIC DIAGRAM-3
TRANSFORMER CIRCUIT
: +B SIGNAL LINE
: -B SIGNAL LINE
TO
POWER CIRCUIT
(CP502) ON
SCHEMATIC
DIAGRAM-2
AC INLET CIRCUIT
14
13
12
11
10
2
4
6
8
9
9
7
5
3
1
15
TO
POWER CIRCUIT
(CN503) ON
SCHEMATIC
DIAGRAM-2
17
16
15
14
13
12
11
10
9
7
6
3
2
AC IN
230 -240V
50Hz
20
SB-WA840EB
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