Chart Of Troubleshooting; Baseband; Power On - Samsung SGH-C260 Service Manual

Flow Chart of Troubleshooting
3.
3-

1. Baseband

3-1-1. Power ON

'Power ON' does not work
check the current
consumption
>= 100mA
Check the Voltage
of the Battery
>= 3.3V
Check the pin
3
C152,C153,C155
UCP107 is >= 2.8V
>=2.8V
Check the clock signal
at pin #3 of OSC101
Freq=26Mhz
Vrms >=300mV
Check the Initial Operation
END
Yes
Yes
No
of
Yes
Yes
Yes
No
Download again
No
Charge the battery
Check "Power
On"
key?
Yes
Check the clock generation
No
circuit OSC101
3-1
No
Check"Power On"Key
check UCD107 and C153
2
1