LG VX5400 Service Manual page 89
Tri band, quad mode [pcs/gps/cellular/amps] cdma mobile phone
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Also See for VX5400:
- User manual (99 pages) ,
- Quick reference manual (49 pages) ,
- Quick start manual (6 pages)
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Check if there is any major difference referring
Check pin3 at U108(PA_R1 signal)
Copyright@2007 LG Electronics. Inc. All right reserved.
Only for training and serving purposes
Start
Check pin2, 7 at U108
To Figure 4.2.2.(h) . Is it similar?
YES
Check pin 1,8 at U108 (Vcc)
whether it is higher than 3.4V.
YES
whether it is lower than 2.2V.
YES
Replace U108
Checking Flow
Checking Flow
YES
NO
NO
Waveform
Waveform
Figure 4.2.2(h)
-89-
PAM circuit is OK. See next page
Check Vcc line
Check PA_R1 line
LGE Internal Use Only
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