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7. Flow Chart of Troubleshooting
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7-1
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7-1 Logic Section
7-1-1 No Power
Press PWR button
C240 + pin > 3.3volt?
Check Battery and its neighboring
circuits
( V_BAT Problem )
Q203 Pin1 "High" ?
Check U100,U204 and its neighboring
circuits
( PS_HOLD Problem )
No
No
Yes
Yes
Yes
END
Q202 pin1,2,5,6 >=3.3volt?
Check Q202 and its neighboring
circuits
( V_IN Problem )
No
Yes
U204 VO2 =2.85volt
&
VO1=2.65volt ?
Check U204 and its neighboring
circuits
( V_MSMP / V_MSMA Problem )
No
Yes
Press PWR button
C243 + pin > 3.3volt?
Check Battery and its neighboring
circuits
( V_BAT Problem )
Q203 Pin1 "High" ?
Check U100,U204 and its neighboring
circuits
( PS_HOLD Problem )
No
No
Yes
Yes
Yes
END
Q202 pin1,2,5,6 >=3.3volt?
Check Q202 and its neighboring
circuits
( V_IN Problem )
No
Yes
U204 VO2=2.85volt
VO1=2.8volt?
Check U204 and its neighboring
circuits
( V_MSMP / V_MSMA Problem )
No
Yes
VO3=2.65volt