Samsung SGH-F300 Service Manual page 24

Flow Chart of Troubleshooting
3-1-2. Initial
The voltage at the C215=1.8V?
The voltage at the C218=2.8V?
The voltage at the VR301
" Low --> High" ?
There is 32.768KHz wave
form at the C317, C318 ?
The voltage is 2.8V
at the C216,C217,C218 ?
LCD Display OK ?
Sound operation OK ?
Initial Failure
YES
YES
YES
YES
YES
YES
END
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NO
NO
NO
NO
NO
NO
3-4
Check the U838
(If it has some problem,
it has to be replaced.)
Check the U838
(If it has some problem,
it has to be replaced.)
Check the UCP300
Check the U838
Check the LCD part
Check the Audio part