Samsung GT-i9000B, Service Manual, Page: 34 / 139

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Level 3 Repair
8-7
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8-3-2. Initial
The pin #1,2 of U206 =
swing properly 1.8V and 0V?
The pin #11,12 of U206=
swing properly 2.8V and 0V?
Initial Failure
check U206 and UCP400 and related parts (short,
crack, etc)
END
No
Yes
AP_PS_HOLD(TP501) and
AP_N_RST_IN (R507) =
"low → High"?
Yes
Check U503 (crack, open, etc)
(if U503 has some problem, it is to be replaced)
Yes
No
There is 32.768KHz wave forms
at OSC200 and OSC501
Replace OSC 200 and OSC501
R233 >= 1.8V?
Check UCP200 and related parts (short, crack,
etc)
Replace OSC 400 and OSC100
There are 24MHz wave forms at
OSC400 and 26MHz wave forms
at OSC100 (C128)
LCD display OK?
Sound is OK?
Check the LCD part (short, crack, etc)
Check the Audio Part (short, crack, etc)
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes