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Flow Chart of Troubleshooting and Circuit Diagrams
10-1-2. System Initial
Voltage of Pin 5 of U301
Voltage of TA314
Voltage of Pin 5 of U302
Voltage of Pin 5 of L302
LCD Display OK ?
Sound operation OK ?
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Initial Failure
> 3.3V
YES
>1.35V
YES
> 3V
YES
=1.8V
YES
YES
YES
END
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NO
Pin 3 of U301 is high?
If not, solder U301 again
NO
Pin 1 of U307 is high?
If not, solder U307 again
NO
If not, solder U302 again
Pin 3 of U305 is high?
NO
If not, solder U305 again
NO
NO
10-4
or replace.
or replace.
Pin 3 of U302 is high?
or replace.
or replace.
Check the LCD part
Check the Audio part
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