Flow Chart Of Troubleshooting - Samsung SGH-D410 Service Manual

2. SGH-D410 Flow Chart of Troubleshooting
1.Baseband
1. Power ON
'Power On' does not work
Yes
Check the current
consumption more
than 100mA
Yes
Check the VBAT
more than 3.3V
Yes
Check the pin
11 of U102 is more
than 2.8V
Yes
U102 pin 33,39
= 2.8V
Yes
Check the clock
signal at pin4 of
OSC801
Freq=13MHz ?
Vrms≥300mV ?
Vpp is around
900mVpp ?
Yes
Check the initial operation
END
No
No
No
No
No
Check the clock generation
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Charge the Battery
Check the C117
No
U102 pin 9
= 1.8V
Yes
circuit
2-1
Check U102 and C116