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75
Check the MICOM IC202
Pin 8 (AUD_MUTE).
No audio output
Is the Q801 Pin 1 (base) 0V?
Insert the audio disc
Does the PWM signal
output at IC501 Pin 79, 80,
87, 88?
Check the IC501.
Check the IC802.
Check the peripheral components
of IC802 and CN303.
Check the IC801.
YES
YES
YES
NO
NO
NO
NO
Does the headphone volume
VR801 control max?
Check the headphone volume
VR801.
YES
NO
Does the audio signal output at
IC802 Pin 1, 7?
Does the audio signal output
at CN303 Pin47, 50?
Does the audio signal
output at IC801 Pin1, 7?
Check the peripheral components
of IC801, JK801 and Cable.
YES
Does the audio signal output
at the headphone jack
JK801?
NO
NO
Headphone
Line-out