Samsung SGH-600BL User Manual Page 23

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  • TROUBLESHOOTING
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Samsung Electronics
5-3
5-1-3 Base Band
POWER ON
Troubleshooting
‘POWER ON’ does not work
Give Battery Power
Check the Battery Voltage
is less than 3.2V
Charge the Battery
Check the path from BATT to U402
Check the path from D401 to U402
(DC/DC convert circuit)
Check the clock generation circuit
(related to U201 and U200)
U402 pin 5 3.6V
(when pushing pwr Key)
U402 pin 2, 3, 4
3.3V (when pusging
pwr Key)
Check for the clock siganl
at U408 pin 83
Check J301
Check the initial operation
END
Yes
No
No
Yes
No
Yes
No
Yes
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