LG H990ds - GSM Rx Signal Path (Bands 850;900;1800;1900)

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reserved. Only training and service purposes
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3. TROUBLE SHOOTING
Checking Rx signal path(GSM850/900/1800/1900)
Image Checking Flow
Check TP1/2/3/4
Signal exist?
START
Check next step
Check Component
above RF signal
path and
FEMid Block
YES
NO
Check
Transceiver
physical damage
or soldering
condition
OK
NOT GOOD
Replace U1101
3.7.1 GSM PART – GSM850/900/1800/1900 Rx
TOP
TP4(GSM1900 Rx)
U1101
(M499)
TP3(GSM1800 RX)
TP2(GSM900 RX)
TP1(GSM850 RX)
50