LG VX8350 Service Manual page 67

VX8350
Check if there is any major difference referring
Check if there is any major difference referring
Referring to Figure 4.2.1(e). Is it similar?
Referring to Figure 4.2.1(f). Is it similar?
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Check pin23(OUT) at U107(TP1)
To Figure 4.2.1(c). Is it similar?
NO
Check pin27,28,29,30 at U107(TP2)
To Figure 4.2.1(d). Is it similar?
YES
Check pin1(TX_ON) at U107(TP3)
whether it is higher than 2.5V.
YES
Check pin15(TCXO) at U107(TP4)
YES
Check pin2, 3, 4 at U107(TP5)
YES
Replace U107
Checking Flow
Checking Flow
RFT6150 circuit is OK. See next page
YES
NO
NO
NO
NO
66
Check MSM6500 (U200)
Check TX_ON signal & MSM
Check TCXO circuit.
Check SBI signal line & MSM
LGE Internal Use Only