LG SPH2B-P Service Manual

3-6
R237
R218
C211
C213
R221
R222
R203
C222 C225 C223 C224
C231
C103
C203
FB201
C202
C205
C206 R236
R215
R234
C101
C221
R213
R214
C104
R233
R232
R231
C102
R211
R212
R216
R217
R223 R224
FB221
R202
R235
R917
C201
R108
R106
R104
172.04M-->221BEAD
R105
R109
R103
R107
R111
RC201
ONE POINT REPAIR GUIDE
5. OPTICAL FUNCTION DOESN’T WORK
5-1. DIR (IC201)
5-1-1. Solution
Replace IC201 on MAIN board & JK551 on JACK board.
5-1-2. How to troubleshoot (Countermeasure)
1) Please voltage check 3.3 V of JK551 pin3.
If 3.3 V voltage doesn’t come out, Replace IC601.
2) Please voltage check 3.3 V of IC201 pin3, 19, 22.
If signal doesn’t come out, Replace IC602.
3) Please check Crystal Frequency (X201)  24.576 MHz and Replace it.
4) Please check SPDIF Signal of IC201 pin6 and Replace it.
5-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
< Schematic point >
0V
0V
( )
21V
0036A
option
21V
CHECK
Assy No
P/N : 6870S-0036A
SH2 PV [MAIN]
2015. 11. 27
D751
C926
R935
R936
C922
C921
R716
R717
C705
R129
R123
C206
R662
R661
RA100
C144
C142
R757
D752
C720
C722
C735
C712
C928
R203
R136
R664
ZD622
R19J
RA102
RA104
RA101
C143
C725
RA103
R758
R704
C708
R701
R703
C927
C924
R938
R131
R132
R133
R146
R128
R106
R107
R108
R109
R105
R111
R104
R217
R221
R222
Debug Monitor
CN103
R180
R19B R19A R19C R19D
R19H
R189
C148
ZD661
R665
FB654 C129
Q751
C757
C174 C175 C176 C177
10
PN506
Q752
C721 C737
PN701
C701
C704
IC921
PCM1808
R137
R121
R126
R124
R235 R917 R234 R232
R237 C231 R236 R233
C222
C103
R103
X201
24.576MHz(SX-1)
CS8422
IC201
R19K R19G R19Q R19P
C123 C122
W25Q32FVS
IC105
Q661
O
V
G
RC201
R24FV1A
R715
R714
R912
R218
R223
R224
R231
C223
PN507
C121
10
PN261
Bt Module
L701
R19ER19F
C153
PN551
DOWNLOAD JIG
PN601
POWER
L702
CN104
Debug
R
E
K
15
110
A
5
IC101
MLC3730S
X201
X201
IC201
IC201
X201
X201

LG SPH2B-P Specifications

General

Brand	LG
Model	SPH2B-P
Category	Speaker System
Language	English