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Checking Rx signal path(B1/B2/B3/B4/B5/B8)
Checking Flow
START
Check TP1/2/3/4.
Does the signal exist?
YES
Check
Transceiver physical damage
or soldering condition
OK?
Check next step
TP1(WCDMA B1/B4)
LGE Internal Use Only
LGE Internal Use Only
Check Component
above RF signal
NO
path
Replace
U1500/U1501
NO
Circuit Diagram
TP2(WCDMA B2/B3)
U1500
TP4(WB8)
TP3(WB5)
TP3(WCDMA B5)
TP4(WCDMA B8)
20
3. TROUBLE SHOOTING
Image
BOTTOM
U1501
TP1(WB1/B4)
TP2(WB2/B3)
Copyright ⓒ 2016 LG Electronics. Inc. All right
Copyright ⓒ 2016 LG Electronics. Inc. All right
reserved. Only training and service purposes
reserved. Only training and service purposes
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