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Flow Chart of Troubleshooting
10-9
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10-1-4. LCD Display part
LCD display is abnormal
LCD Backlight is on?
pin#2 of CN1
is high?
Check LCD
Check CN1
Check LCD connection
and replace LCD
pin#5 of U704
is high?
C517 > 3.5V?
Check C517
Recharge Bat
pin#2 of U704
is high?
Check U201
CHeck U704
C501, C500 is 2.9V?
Check U102
pin#6 of ZD501
is LOW?
Check F507 & U302
Are there anysignal
at pin#5 of ZD501?
IS there any
problem at F501,
F502, F504, F505
Replace or resolve
F501, F502, F504, F505
Check U302
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES