Flow Chart Of Troubleshooting - Samsung SGH-D800 Service Manual

2. SGH-D800 Flow Chart of Troubleshooting
2-1.Baseband
2-1-1. Power ON
'Power On' does not work
Check the current consumption
Current consumption
>= 100mA
Check the Vbat Voltage
Voltage >=3.3V
Check the pin of U101
Pin#J12 >= 2.8V
Pin#A13 and
pin#A14 =2.8V
Check the clock signal at C411
Freq = 26MHz
Vrms >=300mV
Vpp ≒ 900mV
Check the initial operation
END
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Charge the Battery
Check U101 and C113
pin#G11 =
1.5V
Yes
Check the clock generation circuit
(related to 3pin of OSC400, C406, R405)
2-1
No
Check U101, U107 and U106