LG / GOLDSTAR LXS-U150
Instrukcja Serwisowa

FM(TU101) TROUBLESHOOTING
Check the 10V input of TU101 Pin 6

YES

Check the 10V of Q102 "E" YES NO
Check the Power circuit

Check the "High" of TU101 Pin5

Check the "LOW" of IC103 pin7

YES

NO

YES

NO

Refer to "IC103 Troubleshooting"

Replace the Q102

Check the OSC waveform of TU101 pin8 YES NO
Refer the TU101

Refer to "IC102 Troubleshooting"

IC 102 TROUBLESHOOTING
Check the Power input of IC102 pin8 YES NO
IC903,D105,D106 Check

Check the waveform of IC102 pin20, 21

YES

NO

Check the FM(TU101) ,AM(L102)

YES
Replace the IC102 Check the waveform of IC102 pin16, 17

YES

NO

Check the "LOW" of IC102 pin13 Refer to "IC103 Troubleshooting"

YES
END

NO

Replace the IC103

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