LG H990ds - WCDMA DRx Signal Path (Bands B1-B4)

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3. TROUBLE SHOOTING
Checking DRX RF signal path (B1/B2/B3/B4)
Check TP1
Signal exist?
START
Check next step
Check SW1101
Soldering
YES
NO
Check TP2/TP3
Signal exist?
YES
Check U1205
Soldering
NO
Check Transceiver
physical damage or soldering
condition
OK
Replace U1400
NOT GOOD
YES
3.6.4 WCDMA PART – WCDMA B1/B2/B3/B4 DRx
Checking Flow Image
BOTTOM
SW1101
U1205
TP1
(DRx Common)
TP2
(B1/B4 DRx)
TP3
(B2/B3 DRx)
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