Initial - Samsung SGH-X820 Service Manual

Flow Chart of Troubleshooting

10-1-2. Initial

Initial Failure
Check VCCD,
VCCD_1.8V of U300
"High" when the phone
is boot on`
Check
the HP_CORE_1.6V of
U305 is "High"
LCD display is O.K?
Sound is O.K?
END
Yes
Yes
Yes
Yes
Yes
①
No
Check U300
②
No
Check U305
③
No
Check CN305 and LCD part
No
Check audio part
10-4