LG H990ds - LTE Rx Signal Path (Bands B1-B39)

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reserved. Only training and service purposes
LGE Internal Use Only
3. TROUBLE SHOOTING
Checking Rx signal path(LTE B1/B2/B3/B4/B5/B8/B12/B17/B20/B26/B28/B39)
Check
TP1/2/3/~/7/8/9/10
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
TOP
TP2(B2 Rx)
U1101
(M499)
TP3(B3 RX)
TP5(B8 RX)
TP7(B20 RX)
TP1(B1/B4 RX)
TP6(B12/17 Rx)
3.5.1 LTE PART - B1/B2/B3/B4/B5/B8/B12/B17/B20/B26/B28/B39 PRx
Image Checking Flow
TP4(B5/26 RX)
TP8(B28A RX)
TP9(B28B RX)
TP10(B39 RX)
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