Table of Contents
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Flow Chart of Troubleshooting and Circuit Diagrams
9-1-2. System Initial
The pin #9 of U501
" Low --> High" ?
Check the Sleep X-tal signal's
Check the clock signal's
Sound operation OK ?
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Initial Failure
YES
at C518 ?
YES
at R505
YES
LCD Display OK ?
YES
YES
END
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NO
NO
NO
NO
NO
Check the Audio part
9- 4
Check the U501
Check the OSC500
Check the clock
generation circuit
(related to
U501 and TCX800
Check the LCD part
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Table of Contents
Troubleshooting
