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6. AUDIO PART
1) NO POWER
POWER
RESET KEY
Does reset signal appear? (IC502 PIN3)
Is power supplied to MICOM(IC501)?
Does clock waveform appear? (X501)
Does ACC signal applied to MICOM?
(IC501 PIN21)
MICOM FLASH RE-DOWNLOAD
(CN500)
YES
YES
YES
YES
YES
YES
NO
NO
Check MICOM power supply
NO
NO
Check ACC input signal path
(Q515, CN501 PIN9, JT5111)
3-8
Check reset IC (IC502)
(IC522 PIN3)
Defective X-TAL (X501)
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Troubleshooting
