LG SPH4B-W Service Manual

Copyright © 2021 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
MES
1
2
R405 R407
R408
R409
R3A1
R3A2 R3A3
FR2+
R3A4 R3A5
FR2-
R3A6
R5A0
R5A1
CN402
R5A2
R5A3
R5A4
R5A5
R5A6R5A7
R7A1
FL2+
OP5
FL2-
OP6
OP7
R7C2
R7C3
X401
C5A1
C5A2
F300
F301
C431
C432
C433
C434
C435
C436
C437
C438 C439
C440
C446
C7C5
C7C6
Q300
Q301
ZD504
L300
L301
ZD511
L302
ZD512
L308
FM
KEY_G
FL500
L709
L710
RR503
RR505 RR506 RR507 RR508 RR509
RR510
RR511
RR512 RR513 RR514 RR515 RR516 RR517
FB303
FB304
FB305
FB306
JK300
FB310
FB313
R303
FB507
RCF500
FB314
FB508
FB509
FB315
FB316
JK502
FB317
FB318
R308
R310
R505
R506
R312
R507
R314
R508
R315
R509
R319
RC502
RC503
R510
RC504 RC505
R512
RC506
R514
RC509
R515
R516
R518
R519
R327
RC510
CN500
RC511
RC512
CN502
RC513
CN503
RC514
CN504
R520
RC515
CN505
R521
RC516
CN506
RC517
RC518 RC519
R525
R526
R528
R529
CN703
R338
CN704
R339
RC522 RC523
C300
R530
C301
R531
R532
R4C3
R533
C304
R534
C305
R535
C307
C308
C309
C502
C503
C310
R540
C311
R541
C505
C312
R542
C506
C313
R543
C314
C508
R544
C315
C509
C316
C317
R547
C318
R548
C319
R549
X500
C510
MCLK
C513
C4A4
C320
R550
C4A5
C515
C321
R551
C4A6
C322
R552
C323
C517
R553
C324
C518
R554
C519
R555
C326
R556
C327
R557
C329
R365
R559
R366
R368
R560
C330
C331
WFB501
R561
R562
C333
R563
R370
C334
R564
R371
R565
C335
R566
C337
R568
R375
C339
R569
R574
R380R381
R575
R576
C347
OCP
C348
R578
TP_GND
R579
R388
R580
C544
R581
C545
R582
C546
R583
C547
C354
R584
C548
C549
C355
R585
C356
R586
WR503
WR505 WR506
R396
WR507 WR508
C744
WR509
C745
C552
C746
C553
C747
D300
D301
C555
C556 C557
WR510
R594
C364
WR511
R595
C365
WR512
R596
WR513
C367
R597
WR514
C368
R598
WR515
R599
WR516 WR517
D502
D503
C370
C564
C758
C371
C759
R795
R796
R797
R798
C569
C378
C379
D702
D703
C570
L406
L407
C767
IC300
C768
C381
IC301
C382
IC302
C383
IC303
C577
IC306
C387
C388
IC309
C771
C772
C773
C774
IC501
C777
C390
IC310
C778
IC311
C391
C779
WC502
IC312
C392
C393
IC313
WC503
C394
WC504
C588
C395
WC505 WC506
C396
C398
C780
WC509
C783
C784
C785
C786
WC510
WC511
WC512 WC513 WC514 WC515
WC516
WC517
WC518
KEY_TP
WC519
RFB501
WC520 WC522 WC523
R4N4
FB401
R4N5
FB402
FB403
FB404
R4N8
R
L
SL4 / SL4Y / SL4F Main
EAX68408202 Ver1.1
FR4-4L 1.2T
2018.12.06 261X67.5
R5F2
R5F1
C5F2
C5F1
FB510
IC402
Rear SPK
Subwoofer
JK501
1
8
234
765
H:2.55mm
KEY_GND
RDATA2
RMUTE
DGND
WRDY
USB_N
USB_P
CN402
LCD_STB
RRDY
R7A2 R7A3
TGND
R7B0
R7B1
R7B4
BT_RST
R7B9
WLRCK
R7C0
TP300
TP301
LED+
LED-
C7A2 C7A3
BT_CLK
WRESET
RCS
WDA2_WF
BT_GND
RDI
ZD501
RDO
BT_RX
ZD701
ZD702ZD703
C5F3
LCD_CD
FR+
RINIT
Q708
Q709
FR-
FM_ANT
BT_TX
BT_DAT
WMUTE
L709
L710
RR501
RR502
RR504
WNC100
WNC101
WNC102
WNC105
WNC106
WNC107
JK300
FB501
FB502 FB503
WWP
RRESET
FB504
R300
FB311
FB505
R301
R302
WSCL
R304
3.3VA
R305
R306
JK502
R307
WSDA
R309
R311
R313
R316
R317
RSCL
R318
RC501
R702
R703
RSDA
R511
FL+
R321
FL-
R322
R323
LCD_RST
LCD_DAT
R328
R715
R522
R716
R523
R524
WCLK
R527
R335
C302
C303
R340
C306
R536 R537
R538
R539
R346
RCLK
BT_VCC
C500
C501
LCD_CLK
REMO_TP
R351
R545 R546
R355
R356
R357
TP1
C511
C706
W3V3
C707
C514
C708
C325
C328
WGND
R558
R367
C520
C521
C522
C523
VLCD
C524 C525
C332
C526
R3V3
C527
C528
C529
R372
USB5V
R373
R567
WINIT
R374
RGND
C530
C531
C532
C533
R570
C534
C535
R571
C536
R572
C537
R573
C538
C539
C730
C731
R387
C540
C541
C542
C736
C543
C737
R774
C738
C351
R775
C739
RLRCK
R777
WR501
R391
WR502
R392
WR504
R588
KEY
C741
WDATA2
WBCK
C550
GS301
C551
R782
R783
R784
R785
C753
C560
C754
C561
C755
C756
RBCK
C565
C567
WCS
C573
WDI
WDO
IC500
IC503 IC504
WC501
IC505
IC506
C397
USB_GND
IC703
VB0+
RWP
VB0-
VB1+
VB1-
GND
C5F6
C5F4
C5F5
R5F8
R5F7
R5F6
R5F5
R5F4
R5F3
Q502
C336
C338
D401
JK501
3-363-35
PRINTED CIRCUIT BOARD DIAGRAMS
1. MAIN P. C. BOARD DIAGRAM
(TOP VIEW)
(BOTTOM VIEW)

LG SPH4B-W Specifications

General

Brand	LG
Model	SPH4B-W
Category	Speaker System
Language	English