Flow Chart Of Troubleshooting; Baseband; Power On; Baseband 3-1-1. Power On - Samsung SGH-M600S Service Manual

3. Flow Chart of Troubleshooting

3-1.Baseband

3-1-1. 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 UCP300
Pin#J12 >= 2.8V
Pin#A13 and pin#A14
=2.8V
Check the clock signal at pin#30 #31 of U100
Freq = 26MHz
Vrms >=300mV
Vpp ≒ 900mV
Check the clock signal at pin#8 of U100
Freq = 13Mz
Yes
Check the initial operation
END
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
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Charge the Battery
Check UCP300 and C317
No
pin#G11 = 1.8V
Yes
Check the clock generation circuit
(related to OSC100)
Check U100
3-1
Check UCP300 and C318