LG H990ds - Page 29

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3. TROUBLE SHOOTING
Checking DRX RF signal path (B7/B38/B40/B41)
3.5.5 LTE PART – LTE B7/B38/B40/B41 DRx
Checking Flow Image
Check next step
Check Transceiver
physical damage or soldering
condition
OK
Replace U1400
NOT GOOD
YES
Check TP8
Signal exist?
YES
Check B38/B41 FL1207
Soldering
NO
Check TP9
Signal exist?
YES
Check B38/B41 U1208
Soldering
NO
Check TP10
Signal exist?
Check B7 FL1211
Soldering
NO
YES
U1206
TP2
(B7/B38/B40/B41
DRX)
FL1206
FL1209
FL1208
FL1207
FL1211
TP3
(B40 DRX)
TP4
(B38/B41 DRX)
TP5
(B7 DRX)
TP6
(B40 DRX)
TP7
(B40 DRX)
TP9
(B38/B41 DRX)
TP8
(B38/B41 DRX)
TP10
(B7 DRX)
BOTTOM
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