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VX9700
Check if there is any major difference referring
RF_IN fed up with CW signal
LG Electronics Inc.
Start
Check pin3, 7 at U114
To Figure 4.2.2.6. Is it similar?
YES
Check pin4, 5 at U114 (Vcc)
whether it is higher than 3.4V.
YES
Check pin1 at U114 (PA _ON0)
whether it is higher than 2.2V.
YES
Check pin2 at U114 (PA _R1 )
whether it is lower than 2.2V.
YES
Replace U114
in low gain mode of PAM
Checking Flow
Checking Flow
YES
NO
NO
NO
Waveform
Waveform
RF_IN
Figure 4.2.1.6
PAM circuit is OK. See next page
Check Vcc line
Check PA_ON0 line
Check PA_R1 line
RF_OUT
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