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9. Flow Chart of Troubleshooting
9-1. Power On
9-1-1. PDA Part
Insert Power
Check 2pin of V_BAT in
U310
is more than 3.4
3pin in TR301 is High
2 pin in U302 is high
34, 35 pin in U302 is high
In U302
4pin = 3.0V, 23pin = 1.3V
25pin = 1.1V, 33pin = 1.4V
Check Other Power Circuit
NG
Yes
Yes
Yes
Yes
Yes
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No
Change the Battery &check ZD303
No
Check TR301 & neighboring circuit
No
Check the U302 and related circuit
No
Check the related circuit
No
Check the U302 with neighboring
circuit
9-1
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