LG / GOLDSTAR LM-230
Instrukcja Serwisowa

IC601 Troubleshooting
Check the power supplying to IC601 Pin 1 NO YES Check the Pulse waveform of IC601 pin14, 15 (VOL DIAL) NO YES Check the Output of IC601 pin 7, 22 YES NO Replace the IC601 YES NO Replace the �IC301 Troubleshooting� Check the IC301 pin 76, 75, 5, 10 Refer to �Power Circuit Troubleshooting�

Check the PATTERN of MICOM (82, 83)& IC401(21, 22)

Check the waveform input of IC601 pin 8, 21

YES Check the waveform Output of IC601 pin12, 17 YES NO Replace the IC601

END

IC701 Troubleshooting

Check the signal input of pin7, 11 YES NO Refer to �Muting Troubleshooting�

Check the power of pin 3(+) pin 1, 16(-) YES NO Refer to �power circuit Troubleshooting�

Check the signal Output of pin 2, 4 NO

YES

Check the power(5V) of pin 5

END

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