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VX8350
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Checking Flow
Checking Flow
Check pin23(OUT) at U107(TP1)
Check if there is any major difference referring
To Figure 4.2.1(c). Is it similar?
Start
RFT6150 circuit is OK. See next page
NO
Replace U107
YES
Check pin27,28,29,30 at U107(TP2)
Check if there is any major difference referring
To Figure 4.2.1(d). Is it similar?
Check MSM6500 (U200)
NO
YES
Check pin1(TX_ON) at U107(TP3)
whether it is higher than 2.5V.
Check TX_ON signal & MSM
NO
Check pin2, 3, 4 at U107(TP5)
Referring to Figure 4.2.1(f). Is it similar?
YES
Check SBI signal line & MSM
NO
YES
Check pin15(TCXO) at U107(TP4)
Referring to Figure 4.2.1(e). Is it similar?
Check TCXO circuit.
NO
YES
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