LG HB620 - Page 117

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4. TROUBLE SHOOTING
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Only for training and service purposes
Check the RTR 6275
U101
Check TP4
Signal exist?
Rx is OK
Check other Parts
YES
YES
NO
Check TP2
Signal exist?
Check TP3
Signal exist?
YES
Check FEM
FL101
Check the Duplexer
FL104
NO
NO
Check TP1
Signal exist?
Set the Phone Rx is ON
YES
Check the RF S/W
Check bias
Block soldering
Check Vbias over 2V?
YES
NO
NO
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