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Flow Chart of Troubleshooting and Circuit Diagrams
3-2
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3-1-2. System Initial
Check the clock signal's
at R504
Check the Sleep X-tal signal's at C519 ?
YES
NO
NO
YES
YES
YES
NO
NO
NO
YES
Check the Audio part
Check the LCD part
Check the OSC500
END
Sound operation OK ?
LCD Display OK ?
Initial Failure
The pin #9 of U500
" Low --> High" ?
Check the clock
generation circuit
(related to
U501 and TCX800
Check the U500