Samsung GT-P6800 Servise Manual page 40

Level 3 Repair
8-3-3. No Service
No service
Yes
Check memu setting
Menu → applications → setting → wireless and network →
mobile networks → network mode → setting is auto mode ?
PHONE : P6800XXXX
Menu → Phone → Keypad →
*#1234# → check Phone version →
Check the connection of RF coaxial cable
PHONE : P6800XXXX
PHONE : unknown
PHONE : unknown
Check the CP_VSD1,CP_VSD2_1.8V
No
CP_VSD1 (C336) =0.9~1.4V
Replace the UCP300
CP_VSD2_1.8V (C337) = 1.8V
Yes
No
Check VREF
Replace the UCP300
VREF ( C345 ) = 600mV
YES
Change the board
Yes
END
8-9
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