Initial - Samsung SGH-C140 Service Manual

3-1-2. Initial

Initial Failure
check the pin RSTB
of UCP201 is LOW?
check the pin CKI of
UCP201 is 13Mhz?
Check the clock signal
at pin #3 of OSC400
Freq=26Mhz?
Check VCCD_2.9V, VCCD_1.
8V of UCP101 "High" when
the phone is boot on?
Check the Initial Operation
END
Yes
Yes
Yes
Yes
Yes
No
Check UCP201
No
Check R308, R306, C341
No
check
No
Check UCP101
3-3
Flow Chart of Troubleshooting
1
2
3
OSC400
4