Samsung GT-I8190, Servise Manual, Page: 22 / 59

Level 3 Repair
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8-9
8-3-3. No Service
No service
END
Check the
C108,L109,L143,C181,L127,F101 is
well soldered
Yes
Re-solder C108,L109,L143,C181,L127,F101
correspondingly.
Yes
Check VREF
VREF (C129) = 2.5V
Replace the U101
Yes
No
No
Check memu setting
Menu
→
applications
→
setting
→
wireless and network
→
mobile networks
→
network mode
→
setting is auto mode ?
Check the Main Antenna exists or not
Change the Main Antenna
PHONE : I8190XXXX
No
Menu
→
Phone
→
Keypad
→
*#1234#
→
check Phone version
→
PHONE : I8190XXXX
Abnormal
Change the PBA
Abnormal