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IC102 Troubleshooting
Is power supplied to pin8(10V)
Check the waveform of Pin 20, 21
Check the output of Pin 16, 17
END
Refer to “Power Circuit
Troubleshooting”
Check the FM(TUN101) & AM(L107)
Replace the IC102
Replace the IC102
Check the “Low” of Pin 13
Refer to “IC103
Troubleshooting”
YES
YES
YES
YES
NO
NO
NO
NO
NO
IC103 Troubleshooting
Check the power supplying to pin 17
Check the oscillation of X104
Check the waveform of CE, DI, DO, CLK
Is the normal ?
END
Refer to “Power Circuit
Troubleshooting”
Replace the X104
Check the line or refer to “IC 301
Troubleshooting”
CE: Chip Enable
DI: Data Input(from u-com)
DO: Data Output(to u-com)
CLK: Tuner mode clock
Replace the IC103
YES
YES
YES
YES
NO
NO
NO
NO