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VX9100
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved
Only for training and service purposes
Checking Flow
Checking Flow
Check pin23(TP1) at U109
Check if there is any major difference referring
To Figure 4.2.2(c ). Is it similar?
Start
RFT6150 circuit is OK. See next page
YES
Replace U109
YES
Check I/Q data(TP2) at U109
Check if there is any major difference referring
To Figure 4.2.2 (d ). Is it similar?
Check U 202 MSM6550
NO
YES
Check TX_ON signal & MSM
NO
Check pin2, 3, 4(TP5) at U109
Referring to Figure 4.2.2(f) Is it similar?
YES
Check SBI signal line & MSM
NO
YES
Check pin15(TP4) at U109(TCXO )
referring to Figure 4.2.2(e ).
Is it similar?
Check TCXO circuit.
NO
YES
Check pin1(TP3) at U109(TX_ON )
whether it is higher than 2.5V.
Содержание VX9100 Maroon
Страница 135: ...1 VX9100 Assembly Disassembly Diagram ...
Страница 136: ......
Страница 137: ......
Страница 138: ...2 VX9100 Block Circuit Diagram Main Key Pad FPCB ...
Страница 139: ...Block Diagram ...
Страница 141: ...Circuit Diagram Main Key Pad ...
Страница 142: ...Main Board Circuit ...
Страница 149: ...Keypad Circuit ...
Страница 151: ...3 VX9100 Part List Main Key Pad FPCB ...
Страница 161: ...4 VX9100 Component Layout ...
Страница 164: ...5 VX9100 BGA Pin Map ...
Страница 165: ...BOTTOM VIEW Unit mm USED NOT USED 1 MSM6550A U202 A1 Index Mark ...
Страница 166: ...2 HYC0SGH0MF3P 6S60E U300 Unit mm A1 Index Mark USED NOT USED BOTTOM VIEW All Pins assigned to Logic Signal and GND ...
Страница 167: ...3 MAX9775EBX T U301 TOP VIEW USED NOT USED ...
Страница 168: ...4 LP3922 U401 USED NOT USED BOTTOM VIEW ...
Страница 169: ...5 BD6085GUL U500 USED NOT USED BOTTOM VIEW ...