System Initial - Samsung SGH-B300 Service Manual

10-1-2. System Initial

Initial Failure
The pin #G11 of U300 =
1.8V and
the pin #J12 of U300 =
2.8V ?
Is the pin #K9 of U300
"Low → High" ?
There is 32.768kHz wave
forms at the C216 and
The voltage is "High" at
the C313,C314,C310
LCD display is O.K
Sound is O.K
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Yes
Yes
Yes
C217
Yes
Yes
Yes
Yes
END
No
(if it has some problem, it is to be replaced.)
No
(if it has some problem, it is to be replaced.)
No
Check the
No
Check the
No
Check the LCD part
No
Check the Audio part
10-3
Flow Chart of Troubleshooting
Check the U300
Check the U300
UCP200
U300