LG / GOLDSTAR FFH192
Manual de Servicio

FM (TUN101)
Check the +12V input of TUN101 B+ 6 Check the 12V of Q102 �E� YES YES Check the �LOW� of IC103 Pin 7 Check the �High� Voltage of TUN101 VT 5 YES Replace the Q102 Replace the TUN101 NO Refer to �IC103 Troubleshooting� NO Refer to �Power Circuit Troubleshooting�

YES

Check the OSC waveform of TUN101 Pin 8 YES Refer to �IC102 Troubleshooting� Replace the TUN101

IC102 Troubleshooting
Check the power supplying to pin8 NO YES Refer to �Power Circuit Troubleshooting�

Check the waveform of Pin 20, 21 NO YES Check the waveform output of Pin 16, 17 NO YES NO YES END Replace the IC102 Refer to �IC103 Troubleshooting� Check the �Low� of Pin 13 Check the FM(TUN101) & AM(L107) NO Replace the IC102

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