Sharp LC-37B20E (serv.man6) Service Manual ▷ View online
LC-32X20E/S/RU, LC-37X20E/S/RU
7 – 1
LC32X20E
Service Manual
CHAPTER 7.
PRINTED WIRING BOARD
[1] MAIN UNIT PRINTED WIRING BOARD
1
2
3
10
9
7
6
5
4
8
J
A
B
C
D
E
F
G
H
I
13
11
19
18
16
15
14
12
17
MAIN Unit (Side A)
LC-32X20E/S/RU, LC-37X20E/S/RU
7 – 2
1
2
3
10
9
7
6
5
4
8
J
A
B
C
D
E
F
G
H
I
13
11
19
18
16
15
14
12
17
MAIN Unit (
Chip Parts Side A
)
C1118
VA1524
C1119
C1501
FL2605
C1502
C1503
FL2607
C1504
Q1501
C1505
L3301
R2095
C1506
L3302
Q1502
R2096
Q1503
C1507
L3303
C1120
L3304
C1508
C1121
C1509
Q1505
L3305
C1122
Q1506
C1123
Q1507
Q1508
Q1509
FL261
1
FL2613
C1128
C1510
C1129
C151
1
C1512
FL2616
R1103
C1513
FL2617
C1514
Q1510
R1104
C1515
R1105
C1516
R1106
C1130
R1108
C1518
R1109
Q1516
Q1517
C9606
C9607
C9608
C1520
C1521
R1111
C9609
C1523
C1524
C4404
D1501
C4405
Q4401
R111
6
D1502
C4406
R1117
C1527
D1503
C1528
D1504
R1118
C4408
C9611
R1119
C1529
C4409
D1506
R1503
D1507
R1504
D1508
X4501
C1530
C9618
C4410
R1509
IC1501
R1121
R1122
IC1502
R1123
IC1503
C1533
C4413
IC1504
C4414
R1125
IC1505
R1126
D1512
IC1507
D1513
C4417
R1128
R1510
C1538
D1515
D1516
C9622
R1513
R1514
D1519
C9625
R1516
R1517
C1540
C9628
C4420
SC9301
C4421
R1132
FB9702
R1133
R1134
R1137
R9607
IC9601
D1525
R1521
X2001
R4401
D1526
IC9602
R4402
D1527
IC9603
R1523
R4403
IC9604
D1528
R4404
IC9605
R1526
R4406
IC9606
R4407
R1527
R1528
R4408
R1529
R4409
IC4401
IC4402
IC4403
IC4404
IC4405
IC4406
R9617
IC4407
R441
1
R1532
C9642
R1533
R4413
R1534
R1536
R4417
R1538
R4418
R4419
C9649
R9622
R9625
a2
R9627
FB2003
R1540
R4420
FB2004
R1541
R4421
FB2005
R1542
R4422
FB2006
R1543
FB2007
R4423
R1544
FB2008
FB2009
R4425
R1546
C9656
C9657
R1547
R4427
R1548
R4428
R1549
R4429
FB2010
FB201
1
P8102
R4430
C9660
R1551
R1552
C9662
R1553
R4433
R4434
C9664
R1555
R4435
FB2402
R1556
FB2403
FB2404
R1559
R4439
R4440
R4441
C9671
R1562
C9672
R1563
C9673
C9674
R1565
C9675
R4446
R4447
FL1501
R9652
FL1502
FL1503
P3301
C8104
C8105
C8106
C8107
C8108
R1575
C8109
R1576
R4456
R1577
R4457
R4458
C8301
R4459
C8302
C81
10
C8111
R9667
R4460
R4461
C8117
R4464 R4465
R4467
R4469
L2601
L2602
L2603
C8120
L2604
C8121
L2605
L2606
L2607
L2608
R4471
D8101
L2609
R4472
D8102
R4473
C8704
R4474
C8705
Q8701
R4475
R8101
C8706
Q8702
R4476
C8707
R4477
R4478
C8708
L2610
R8105
R4479
L261
1
L2612
IC8101
C3313
C3314
R4480
C8711
R4481
R8301
C8135
R8302
C8136
R4482
R8303
R4483
R8304
C8714
C8715
R8111
C8139
R81
12
IC8301
R81
16
IC8302
IC8303
R81
17
IC8304
R81
18
C8140
P9101
R8119
C3323
R8310
C3518
R831
1
C8146
R8120
R3301
D8701
C8149
R8123
R8124
R8701
R8703
C3330
C8150
R8704
R8705
C8345
C8151
IC3301
R8706
C8346
R3501
IC8702
R3502
IC8703
R3503
R3310
R3311
R3506
R3507
R8710
R3314
IC3501
R3315
R3509
IC3502
R8714
R8138
R8139
C9104
R8718
C9105
C3539
C9106
R8332
R3512
C9107
R8333
C9108
R3514
C9109
R8142
R3516
R8143
R8144
P4501
R8145
P4502
R8146
R8723
R8147
R8148
C9111
R8149
C91
13
C3548
C3549
R8729
LUG1101
R3521
C8176
LUG1
102
LUG1
103
C3357
LUG1
104
R3524
C8179
R3525
LUG1
105
R8152
R3526
LUG1106
LUG1107
R8153
R3527
C3550
R3528
R8154
C3551
408
1Q
108
1Q
C8180
C8181
R3530
C8379
R3532
R8160
FB1501
SC1
101
P2001
R3341
FB1502
P2002
R3342
FB1503
P2003
FB1504
C8380
P2004
R3344
FB1505
C4501
P2005
R3345
R3539
FB1506
C4502
FB1507
C4503
R8167
R3347
FB1508
R3348
IC9101
R8169
C3374
14
53
R
04
53
R
R3542
R3543
C3377
R9304
R8170
R3544
C3378
R9111
L1101
R8171
R3351
L1102
R8172
R9306
R3352
R3546
R1607
R91
13
R9307
R8173
L1104
R91
14
R9308
R3354
L1105
R9115
FB1515
R8175
L1106
R9116
SC1501
P2401
SC1502
R1802
SC1503
FB9603
C8397
R1804
R9312
R9120
R3554
R9314
C2001
R3555
FB4402
R3556
R9316
R3557
R9124
C2004
R3558
R9318
Q2001
C2005
P2601
P2602
P2603
L1501
R9129
C2009
L1502
L1503
L1504
R3560
R9320
L1506
R9322
L1507
R1817
R9323
R9130
L1508
R9324
L1509
C2011
R9325
R9132
R9326
R9133
R9327
R9328
IC4501
R9329
R9136
L1510
R9138
R9139
L1511
C2401
C2019
L1512
C2402
C2403
L1513
C2404
R3570
R9330
R9331
C2405
R3571
R9332
C2406
R3572
C2407
Q2403
R3573
R9140
C2408
Q2404
R3574
C2409
Q2405
L9601
R9141
R3575
R9335
R9336
Q2406
L9602
R3576
L9603
Q2407
R9337
R3577
L9604
R9144
R3578
R9145
L9605
SC4602
L9606
R9147
D2003
C2410
C2604
R9149
C2605
R2002
C2607
C2608
R2004
C2609
R2006
C2030
R2008
R2009
R9152
IC2002
R9153
R9154
R201
1
R2012
D2401
D2402
D2403
D2404
R9160
R9161
D2405
R2019
TH2001
IC201
1
R2405
R9166
R2407
R2408
R2020
R2409
IC2401
D2601
R2022
IC2402
IC2403
504
2CI
404
2CI
R2601
R2602
R2027
R2603
R2410
R2028
R2604
R2606
R2413
R2414
R9174
R2608
R2415
IC2601
R2416
R9176
IC2602
R2417
R9178
R9179
X8101
R2031
X8102
R2034
R2610
R261
1
R2036
R2037
R2613
R2614
R9181
R2421
R2616
R9183
R2617
R9184
R2618
R2619
R2041
R2044
R2620
R2045
R2621
R2622
R2430
R2048
R2431
R2432
R2433
R2434
R2435
FB8101
R2436
FB8102
FB8105
X3301
R2051
FB8107
R2054
X8701
R2055
FB8109
R2057
P1101
P1102
P1103
FB81
10
FB81
12
R2062
R2063
C8233
FL2001
R2069
VA1501
VA1502
VA1503
VA1504
FB3304
VA1505
FB8701
FB3306
VA1506
R2072
VA1507
VA1508
VA1509
R2075
R2076
R2077
FB3501
C1102
C1103
VA1510
LUG3501
C1105
VA1511
C1106
VA1512
VA1513
C1107
C1108
Q1104
VA1514
VA1515
C1109
Q1105
VA1516
Q1106
R2082
VA1517
Q1107
Q1108
VA1518
VA1519
C1110
P9601
C1112
VA1520
VA1521
FL2601
VA1522
C1117
VA1523
FL2603
LC-32X20E/S/RU, LC-37X20E/S/RU
7 – 3
1
2
3
10
9
7
6
5
4
8
J
A
B
C
D
E
F
G
H
I
13
11
19
18
16
15
14
12
17
MAIN Unit (
Side B
)
LC-32X20E/S/RU, LC-37X20E/S/RU
7 – 4
1
2
3
10
9
7
6
5
4
8
J
A
B
C
D
E
F
G
H
I
13
11
19
18
16
15
14
12
17
MAIN Unit (
Chip Parts Side B
)
FL
2604
Q1115
R2091
Q1116
R2092
FL
2606
Q1
117
R2093
Q1118
R2094
FL
2608
Q1119
Q1
50
4
L3306
Q1120
C1124
C1125
Q1121
D1101
D1102
C1126
Q1122
C1127
FL
2614
R1101
FL
2615
R1
102
R1
107
C1517
C9
601
C1519
C1131
C9
602
C1132
C9603
C1133
C9
604
C1
13
4
C9605
Q9601
Q1519
C1
135
C1136
Q9
60
3
C1
13
7
Q9
604
R1110
C1
13
8
Q9
605
C1139
R1112
Q9606
C1
52
2
R1
11
3
Q9607
R1114
Q9
60
8
R1115
C1525
Q9609
C1
52
6
C4407
C9610
C1
14
0
D1505
R1
50
1
C1141
R1502
C9612
C9613
C9614
Q9610
C9615
R1
50
5
D1
50
9
C9616
C9617
R1507
R1120
R1508
C9619
C1531
C4
41
1
C1532
C1534
R1124
C1535
C4415
IC1506
C4416
R1127
IC1508
C9620
R1129
C9621
R1511
R1512
C9623
D1517
C9624
D1518
R1515
D9601
C9626
D9602
C9627
R1518
D9604
R1130
R9
60
1
R1131
C9629
D9605
R1
51
9
D9606
R9
60
2
C1543
R9603
D9607
D1520
C1544
R9
604
D9
60
8
C1545
R1
13
5
R9605
D9
60
9
C1546
R1
13
6
R9606
C1547
R1520
R9
60
8
C9630
C1548
C9631
R9609
R1522
C9
63
2
C9633
D9610
C9634
R1
52
4
C9
635
D9611
R4
40
5
C9636
D9612
C9637
R9610
C9638
R9611
C1
551
C9639
R1142
R9612
R9613
R9614
D1530
R9
61
5
D1531
R9616
R4410
R1
53
0
R9618
IC4408
C9640
IC4409
C9641
R9
61
9
R1531
C9
643
C9644
R1535
C9645
C9646
R1537
C9647
R9620
C9648
R1151
R9621
R1539
R1152
R1153
R9623
R1154
R9624
R1155
FB2001
R1156
R9626
FB
2002
R1
15
7
R1158
R9628
C9650
R1159
R9629
C9651
C9652
C9653
R4424
C9654
R1545
C9655
R4
42
6
R1
16
0
R9
630
C9
65
8
R1161
R9
631
C9659
R1162
R9632
R9
63
3
R1164
R9634
R9635
R1165
FB
2012
R9636
R1
166
FB
2013
R9637
C1
57
8
R1550
R9638
C1
57
9
R9639
C9661
R4431
R4432
C9663
R1554
C9665
C9
66
6
R4
43
6
R1557
R4
43
7
R1558
R4438
C9668
R9640
C9669
R9641
C1582
R9642
C1583
R9643
R9644
R9645
R9646
C1
58
6
R9647
C1
58
7
R1560
R9
648
R9649
C1
58
9
R1561
R1564
R1566
R1568
C1
591
C1
592
R9653
R9654
R9655
C8
101
C1
59
6
R9656
C8
102
C1
597
R9657
C8103
R9658
R1570
R1571
C1599
R9659
R4452
R4453
R4453
R4454
R4455
R9660
R1579
R9661
R9662
C8
30
3
R9663
C8304
R9664
R9665
R9666
C8112
C8
11
3
R1580
C8114
C8115
R4462
C8116
R4463
C8
11
8
C8119
R4466
R4468
C8314
C3301
C8315
C3302
C8122
C8316
C3303
C8317
C8123
C3304
C8
318
R4
47
0
C8124
C8701
C3305
C8319
C8125
C8702
C8126
C3306
R1593
C8703
D8
10
3
C8
12
7
C3307
R1594
D8104
C8128
C3308
R1595
C8129
C3309
R8
102
Q8
70
3
R8103
C8320
R8104
C8709
C8321
C3501
R8106
C8
32
2
C3
502
R8107
C3503
R8108
C8130
C3
31
0
C3504
R8
109
C8131
C3505
C3311
C8132
C3
506
C3
31
2
C8
133
C8327
C3507
C8328
C8134
C3508
C3315
C8329
C3316
C8712
C3317
C8137
C8713
C3318
C8138
R4484
R8
110
C3319
R4485
R8305
R8
30
6
R4486
C8717
R4487
R8
307
R8113
C8718
C8330
R8308
R8114
R8115
C8331
R8
309
C8332
C8
33
3
C3513
C3320
C8334
C3514
C8335
C8
141
C3321
C3515
C8336
C8142
C3516
C3
32
2
C8337
C8143
C3517
C8144
C8338
C3324
D3301
C8145
C8339
C3325
C3326
D3302
D3
30
3
C3327
C8147
C8148
C3328
R8121
C3329
R8122
R3302
R3303
C8340
C3
520
R3304
C8341
R8
12
5
C3521
R3305
R3306
R8126
C8342
C3
52
2
R3307
C8343
R8127
C3523
R3308
R8128
C8344
C3524
C3331
R3309
R8129
C3525
C8152
C3332
C3
52
6
C3333
C8153
C8347
C8348
C8154
C3334
C3335
IC8701
C8349
C8155
C8156
C3336
C3337
C8157
R8130
C8158
IC8704
C3338
C3339
R8131
C8159
R3
31
2
R8132
R8133
C8350
R8135
C8351
C3531
R8712
R8136
C8352
R3316
C3532
R8137
R8713
C8353
R3317
C3533
C8160
C8354
C3340
R3318
C3534
C9
101
C8161
C8355
R3
31
9
C3341
C3535
C8
16
2
C8356
C3342
C8357
C8163
C3343
C3537
C8164
C8358
C3
34
4
C3538
Q9101
C8165
C8359
R3
51
1
C3345
Q9
102
C8166
C3346
C8167
C3347
R3
51
3
R8140
C8168
R3320
C3348
R8
14
1
C8169
C3
34
9
R3321
R3322
R3323
C8360
C3540
C8
36
1
C9301
C3541
R3325
R8722
C8362
C3542
C8363
C3543
R3327
C9
11
0
C8170
C8364
C3544
C3350
R3
328
R3329
C8171
C8
365
C3545
C3351
FB1101
C9
11
2
C8366
C8172
C3546
C3
352
FB
1102
C8
173
C8367
C3547
C3
35
3
FB
1103
R8
728
C1608
C9114
C8174
C8368
C3354
FB
1104
C9
11
5
C8369
C8175
C3355
FB
1105
C9
116
C3356
C9117
C8177
R3330
C8178
R8150
C3358
R3331
C1
80
1
R8151
C3359
R3332
C1802
C1803
R3333
C1
80
4
R3334
C8370
R8730
R3335
C8
37
1
R8155
R3336
Q1802
R8156
C8372
Q1
80
3
C1613
C8373
R8157
R3337
C1614
R8158
C8374
C3360
R3338
C1615
C8375
R8159
C3361
R3339
C1616
C8
182
C8376
C3362
C8377
C8183
C3
36
3
Q1808
C8378
C8
18
4
C3364
D9101
Q1809
C8185
C3365
C8
186
C3
366
C8
187
C3367
R3340
C8188
C3368
R9
10
1
C8189
R8161
C3
369
R9102
R8162
C1813
R9103
R8163
R3343
R9104
R8
16
4
R9
10
5
R8
16
5
C8381
R9106
C1816
R8166
C8382
R3346
R9107
C8383
R9108
C8384
C8190
C3
370
R9109
FB1509
C8385
C8191
C3
371
R3349
C8192
C8386
C3
37
2
C8387
C8193
C3
37
3
IC9104
C8194
C8
388
R1601
IC9105
C8195
C8389
R9301
C3
37
5
IC9106
C8196
R9302
C3376
R9303
C8
197
R1604
R9110
FB1510
C8198
R3350
R1605
R9305
C3379
C8
19
9
R1606
R9112
L1103
R3353
R8174
C8390
R1
609
D1801
C8391
IC9301
R3355
D1802
C8392
R9117
C8
393
C3380
R9118
C8394
C3381
R9119
R1801
C8
39
5
C3382
R1
80
3
C3383
R9310
C3384
C3385
R9311
C3386
C3
387
R9313
C3
388
R9121
C3389
R9315
R9122
C2002
R9123
C2003
FB4403
R9317
IC1805
R9125
R9
31
9
R9126
C2006
Q2002
R9127
C2007
R9128
Q2004
C2008
C3390
C3
39
1
C3
39
2
C3393
C3394
C3395
R9321
R1
622
C3396
C3397
C2010
C3398
R9131
R1819
C3399
C2012
R4507
C2013
R9134
R4508
C2014
R4509
R9135
C2015
C2016
R9137
C2017
C2018
R1820
R4511
Q2401
R4512
Q2402
R9333
R4513
R9334
R4514
C2020
R4515
C2021
R9142
R9143
C2
023
R4518
R3
57
9
R9146
C2026
C2027
R9148
C2028
C2029
Q2601
R2001
C2606
R2003
R2
00
5
R2007
R9150
R9
15
1
IC2001
C2033
C2034
IC2004
R9155
R9156
IC2006
R9
15
7
R9
15
8
IC2008
R2010
R9159
IC2009
R2013
R2014
R2
01
5
R2016
R2
01
7
IC2010
R2018
R2401
R9162
R2402
R9163
R2403
R9164
R2404
R9165
R2406
R9167
R9168
R9169
R2021
R2
02
3
R2
02
4
R2025
R2
02
6
R9170
R9
171
R2
02
9
R2605
R9
172
R9173
R2607
R9175
R2609
R9177
R2418
C8200
R2030
R2419
C8201
R2032
C8
20
2
C8
20
3
R2033
C8204
R2035
C8205
C8206
R2
612
C8207
R9180
R2
420
C8208
R2038
R2039
C8209
R2615
R9182
R2422
R2
423
R2
424
R9185
R2425
R2
42
6
R9186
R2427
R9
187
R2
42
8
R9
18
8
R2040
C8210
R2429
C8211
C8212
R2042
C8213
R2043
C8214
C8215
C8216
R2046
R2047
R2623
C8217
C8218
R2624
R2049
C8219
R2625
R2626
R2627
R2628
R2629
FB
8103
C8220
R2050
FB
8104
C8221
R2052
C8222
FB
8106
C8223
R2
05
3
C8224
FB
8108
C8225
R2056
C8
22
6
C8
22
7
C8
22
8
C8
22
9
FB8111
FB8
11
3
C8230
FB8114
R2061
FB8
11
5
FB
8116
C8232
FB
8117
C8234
FB8118
C8235
FB
8119
C8236
R2066
C8237
R2067
R2
06
8
FB
8120
FB
8121
FB
3303
R2070
R2071
FB3305
FB3307
R2074
FB3308
FB3309
R2079
C1104
FB3310
FB
3311
LU
G3
502
FB3312
LUG3503
Q1103
FB3313
FB3314
R2080
R2
08
1
FB3
31
5
Q1109
R2086
R2088
R2089
C1113
Q1110
C1115
C1116
FL
2602
