Samsung SGH-M300 Service Manual page 20

3-1-2. Initial
Initial Failure
The pin #G11 of UCP301 =
1.8V and
the pin #J12 of UCP301 =
2.8V ?
Is the pin #K9 of UCP301
"Low → High" ?
There is 32.768kHz wave
forms at the C223 and C224
Is the pin #G4 of UCP201
is "High"
The voltage is "High" at the
C311,C312,C313
LCD display is O.K
Sound is O.K
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Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
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No
Check the
(if it has some problem, it is to be replaced.)
No
Check the
(if it has some problem, it is to be replaced.)
No
Check the
No
Check the
No
Check the
No
Check the LCD part
No
Check the Audio part
3-5
Flow Chart of Troubleshooting
UCP301
UCP301
UCP201
UCP201
UCP301