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4. TROUBLE SHOOTING
4.15 FM RADIO Trouble
TEST POINT
Check Points
-FM RADIO IC soldering
- 32khz signal working correctly
WAVE FROM
CIRCUIT
FM_ANT
LGE Internal Use Only
R321
1
C327 100p
NC1
GND3
2
U304
FMIP
LOUT
3
RFGND
ROUT
4
GND1
GND2
5
_RST
VD
SI4702-C19-GM
TP 1
C343
27p
- 74 -
U304
TP1
47K
V_IO
V_ABB
15
R327
C325
100ohm
14
13
C328
12
R328
11
100ohm
V_IO
C335
1u
C334
1u
C337
C336
22n
22n
V_ABB
C338
0.1u
U306
TC7SH04FS
VCC
5
C341
0.1u
C342
4
1
2
GND
R331
47K
Copyright © 2008 LG Electronics. Inc. All right reserved.
C328
C325
C343
C341
U306
0.1u
RADIO_L
0.1u
RADIO_R
0.1u
CLK32K
Only for training and service purposes
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