TROUBLESHOOTING GUIDE
NO SOUND
Yes
Is sound setting appropriate ?
Yes
No
Check speaker and headphone jack.
Is the AUDIO signal at pin
7 of IC7301?
Yes
No
Check IC7301 and associated circuit .
Check J703 and at pins 17 and 18 of
CP2403 and associated circuit.
E-5
No
Yes
Check the pins 2, 4 of IC701 and
associated circuit .
Is the waveform at pins 6
and 8 of IC1001?
Is the AUDIO signal input
at pin 3 of IC7301?
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