CIRCUIT DIAGRAM - MAIN BOARD
1
2
3
4
5
6
7
A
B
C
D
8
8
7
6
5
4
3
2
1
D
C
B
A
VSSA2
1
SGND2
2
VDDA2
3
IN2-
4
IN2+
5
MODE
6
OSC
7
IN1+
8
IN1-
9
VDDA1
10
SGND1
11
ASSA1
12
PROT
13
VDDP1
14
BOOT1
15
OUT1
16
VSSP1
17
STABI
18
SBVD
19
VSSP2
20
OUT2
21
BOOT2
22
VDDP2
23
VSSD
24
IC501
TDA8920BTH
1
2
3
4
5
6
7
8
9
JK401
L502
33u
L50127u
C570
560P
C524
153
C525
560P
C526
N824
C527
224
C528
153
R
515
22 1/2W
R516
5.6 1/4W
R517
22 1/2W
R524
5.6 1/4W
R514
5.6 1/4W
R523
5.6 1/4W
VSSP
VDDP
C529
C530
C571
C531
N824
C533
153
C532
224
C
539 104
C520
224
VSSPVDDP
R532
10R
R531
10R
VSSP
VDDP
VSSP
C537
224
C538
68P
C519
104
C504
1000P
C521
104
C536
104
C510
474
C509
330P
C523
104
C541
104
C534
104
C
501
1000P
C517
104
C512
330P
C505
474
VDDP
VSSP
C414
100P
C401
100P
C
919
104
C503
1000P
C502
1000P
C506
474
C511
474
C409
100P
C303
224
C928
104
C
918
104
C927
104
VSSA2
1
SGND2
2
VDDA2
3
IN2-
4
IN2+
5
MODE
6
OSC
7
IN1+
8
IN1-
9
VDDA1
10
SGND1
11
ASSA1
12
PROT
13
VDDP1
14
BOOT1
15
OUT1
16
VSSP1
17
STABI
18
SBVD
19
VSSP2
20
OUT2
21
BOOT2
22
VDDP2
23
VSSD
24
IC502
TDA8920BTH
L504
33u
L503
27u
C572
560P
C549
153
C550
560P
C552
N824
C551
224
C553
153
R520
22 1/2W
R521
5.6
R522
22 1/2W
R526
5.6
R519
5.6 1/4W
R525
5.6 1/4W
VSSP
VDDP
C554
C558
C573
C559
N824
C561
153
C560
224
C567
104
C545
224
VSSPVDDP
R533 10R
R534
10R
VSSP
VDDP
VSSP
C565
224
C566
68P
C544
104
C546
104
C564
104
C514
474
C513
330P
C548
104
C569
104
C562
104
C542
104
C516
330P
C507
474
VDDP
VSSP
C508
474
C515
474
+
C420
10UF/50V
+
C419
10uF/50V
+
C417
10UF/50V
+
C930
33UF/25V
+
C577
47UF
/
16V
+
C302
22UF/50V
+
C931
330UF/25V
13
12
14
IC401D
TL074CN
9
10
8
IC401C
TL074CN
6
5
7
IC401B
TL074CN
2
3
1
IC401A
TL074CN
11
4
IC401E
TL074CN
C
402
100P
C410
470P
C403
100P
C411
0.1uF
C404
100P
C412
470P
R913
10K
C413
100P
R914
10K
C416
100P
C415
103p
Q502
2SC945
Q501
2SC
945
D502
1N4148
D501
1N4148
+
C57610UF/16V
+12V
FB
403
600
FB401
600
FB404
600
FB402
600
1
2
3
4
CN901
CN4/396
FB905
100
FB901 100
FB902
100
FB904
100
FB906
100
FB903
100
VDDP
+
C922
470UF/35V
+
C923
470UF/35V
+
C
915
3300UF/35V
+
C
916
3300UF/35V
VSSP
+
C
925
100UF/25V
+
C
926
100UF/25V
R915100 2W
R916
1.0K 1/2W
ZD904
11.9-12.4V
ZD903
11.9-12.4V
+12V
1
2
CN904
CN2/20
1
2
RB904
CN2/20
LD901
LED
1
2
CN501
-12V
Q907
2SA733
Q906
2SC945
Q301
2SC945
D906
1N4148
D909
1N4148
D908
1N4148
ZD905
5.0-5.2VZ
ZD301
5.6-5.9V
VDDP
VDDP
+24V
GND
-24V
D301
0805 0R
1
2
CN301
CN2/20
Te
STB-BY
GND
FB
405
600
R412
1K
R411
1K
R410
1K
R409
1K
R404
30K
R408
15K
R403
30K
R406
15K
R402
30K
R401
30K
R405
15K
R504
10K
R503
10K
R502
10K
R501
10K
R4137.5K
R414
11K
R416
11K
R
407
5.
6K
R415
22K
R507
5.6K
R511
5.6K
R508
5.6K
R512
5.6K
R509
5.6K
R506
5.6K
R510
5.6K
R505
5.6K
R
518
30K
R
513
30K
R535
10K
R
537
1.
8K
R536
30K
R538
470
R304
39K
R303
560
R302
10K
R301
47K
R924
4.7K
R923
100K
R921
220K
R917
4.7K
R
918
15K
R919
100K
R
922
1K
+24V
-24V
L-IN
R-IN
C-IN
MUTE
SW-IN
JK501
SPK
/3C
H/6P
+
C418
10UF/50V
+
C406
10UF/50V
+
C407
10UF/50V
+
C408
10UF/50V
+
C405
10UF/50V
ZD906
8.
5V
D901
1N4148
D903
1N4148
D904
1N4148
D902
1N4148
D907 1N4148
D905
1N4148
+
C901
10UF/50V
+
C
902
100u/50V
Q901
2SC945
Q902
2SA733
R903 1/2W
150
R
904 1/2W
120
R902
2.2k
FB
907
100
+12v
1
2
CN902
Fan
R901
4.7k
C578
104
C579
104
C580
104
C553
104
R920
10K
R418
10K open
R417
10K
open
R420
10K open
R419
10K open
R
528
47K
R
530
47K
R
527
47K
R
529
47K
C540
104
C547
104
C522
104
C568
104
+
C575
47UF/63V
+
C574 47UF/63V
VSSP
VDDP
VSSP
VDDP
+
C920
470UF/35V
+
C921
470UF/35V
IC502
IC501
Q908
882
R912
1.8K
R
539
1K
R
541
1K
R
540
1K
R
542
1K
+
C903
100UFzz
16V
C904
104
C302 D6
C303 D7
C401 C2
C403 B2
C404 A2
C405 C2
C406 B2
C407 B2
C408 A2
C409 C3
C410 B3
C411 B3
C412 A3
C413 C3
C414 C3
C415 B3
C416 B3
C501 C4
C502 B4
C503 B4
C504 A4
C505 C5
C506 C5
C507 B5
C508 A5
C509 C5
C510 C5
C511 C5
C512 C5
C513 B5
C514 B5
C515 B5
C516 B5
C517 C5
C519 B5
C520 C6
C521 C6
C522 A3
C523 B6
C524 C7
C525 C7
C526 C7
C527 C7
C528 C8
C529 C7
C530 C7
C531 C7
C532 C7
C533 C8
C534 B5
C536 C5
C537 B6
C538 B6
C539 C6
C540 A3
C541 B6
C542 B5
C544 A5
C545 B6
C546 B6
C547 A3
C548 A6
C549 B7
C550 B7
C551 B8
C552 B7
C553 B8
C554 B7
C558 B7
C559 B7
C560 B8
C561 B8
C562 A5
C564 B5
C565 A6
C566 A6
C567 B6
C568 A3
C569 A6
C570 C7
C571 C7
C572 B7
C573 B7
C574 A3
C575 A3
C576
A7
C577
A6
C578
C8
C579
C8
C580
B8
C901
D8
C902
D8
C903
D7
C904
C7
C915
D1
C916
D1
C918
D2
C919
D2
C920
D2
C921
D2
C922
D2
C923
D2
C925
D3
C926
D3
C927
D3
C928
D3
C930
D4
C931
D5
CN301 C1
CN501 B8
CN901 D1
CN902 D7
CN904 D3
D301
C2
D501
A6
D502
A6
D901
C8
D902
C8
D903
C8
D904
C8
D905
C8
D906
D4
D907
C8
D908
D5
D909
D5
FB401 A1
FB402 B1
FB403 C1
FB404 B1
FB405 C1
FB901 D2
FB902 C2
FB903 D2
FB904 D2
FB905 D3
FB906 C2
FB907 D7
IC401A A3
IC401B B3
IC401C B3
IC401DC3
IC401E D4
IC501 C5
IC502 A3
JK401 B1
JK501 B8
L501
C7
L502
C7
L503
B7
L504
B7
Q301
D6
Q501
A5
Q502
A4
Q901
D8
Q902
D8
Q906
D5
Q907
D5
Q908
D3
R301
D6
R302
D6
R303
D6
R304
D7
R401
C2
R402
B2
R403
B2
R404
A2
R405
C2
R406
B2
R407
B2
R408
A2
R409 C2
R410 C2
R411 B2
R412 A2
R413 C3
R414 C3
R415 B3
R416 A3
R912 D2
R501 C4
R502 B4
R503 B4
R504 A4
R505 C4
R506 C4
R507 B4
R508 A4
R509 C4
R510 C4
R511 B4
R512 B4
R513 C6
R514 C7
R515 C7
R516 C7
R517 C7
R518 B6
R519 B7
R520 B8
R521 A7
R522 A8
R523 C7
R524 C7
R525 B7
R526 A7
R527 C4
R528 C4
R529 B4
R530 B4
R531 C6
R532 D6
R533 B6
R534 B6
R535 A6
R536 A5
R537 A5
R538 A5
R539 B8
R540 B8
R541 C8
R542 C8
R901 D8
R902 D8
R903 D7
R904 D7
R913 D1
R914 D1
R915 D2
R916 C2
R917 D4
R918 D4
R919 D4
R920 D5
R921 D4
R922 D3
R923 D5
R924 D5
ZD301 D6
ZD903 D3
ZD904 D3
ZD905 D4
ZD906 D4
10-8
10-8
