LG VX10000 Service Manual page 71

VX10000
Check pin2, 13(TP2) at U1008
Check if there is any major difference referring
Check pin4, 11(TP3) at U1008 ( Vcc)
whether it is higher than 3.4V.
Check pin3(TP4) at U1008(PA_R1 signal)
whether it is lower than 2.2V.
RF_IN fed up with CW signal
in low gain mode of PAM
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Only for training and service purposes
Checking Flow
Start
To Figure 2.1(i) Is it similar?
YES
YES
YES
Replace U1008
Checking Flow
PAM circuit is OK. See next page
YES
NO
NO
Waveform
Waveform
RF_IN
Figure 2.1(i)
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Check Vcc line
Check PA_R1 line
RF_OUT
LGE Internal Use Only