LG H990ds - GSM DRx Signal Path (Bands 1800;1900)

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reserved. Only training and service purposes
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3. TROUBLE SHOOTING
Checking DRX RF signal path (GSM 1800/1900)
Check TP1
Signal exist?
START
Check next step
Check SW1101
Soldering
YES
NO
Check TP2
Signal exist?
YES
Check U1205
Soldering
NO
Check Transceiver
physical damage or soldering
condition
OK
Replace U1400
NOT GOOD
Checking Flow Image
BOTTOM
SW1101
U1205
TP1
(DRx Common)
TP2
(GSM1800/1900 DRx)
3.7.4 GSM PART – GSM 1800/1900 DRx
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