Chart Of Troubleshooting - Samsung B2700 Service Manual

Flow Chart of Troubleshooting
10. Flow Chart of Troubleshooting
10-1-1. Power ON
'Power On' does not work
Check the current consumption
Current consumption
>= 100mA
Check the VBATT Voltage
Voltage >=3.3V
Pin#2 D301 is high?
Check the PMIC output
voltage
(C401,C402,C408,C415,
C417,C430,C432)
Check Pin#3 of OSC401
is 26MHz?
Check the initial operation
END
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
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Charge the Battery
Check R322, D301, D300
Check U400
Check the clock generation circuit
(related to OSC401)
10-1