LG -600 Series Repair Manual page 69

Appendix.
Tx Flow Chart & Solution
7-A) Check Pin 9(TXIP) & 10 번 (TXIN), Pin 11(TXQP) & Pin 17(TXQN) Using Oscilloscope
4 Pin ALL No Just Pin 1,2 or 3 Yes
Yes
TXIQ Line Short ?
High Output ? High Output ?
Yes
No No
U501 (Nausica) is Not Working Check Short
Goto Block 8 !!
Replace U501 Block 7) Test!!
Reference TXIQ Signal
GSM Handsets Lab.
69