Level 3 Repair
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Confidential and proprietary-the contents in this service guide subject to change without prior notice.
8-15
8-3-8. No Service
No service
END
Check the CP V_BAT
L300,L301,L302,C300 = 3.6~4V
Yes
Replace the L300,L301,L302,C300
Yes
Replace the UCP300
Yes
No
No
Check memu setting
Menu
→
applications
→
setting
→
wireless and network
→
mobile networks
→
network mode
→
setting is auto mode ?
Check the contact of antenna.
(Sub FPCB)
Change the board
PHONE : I9500XXXX
PHONE : unknown
Menu
→
Phone
→
Keypad
→
*#1234#
→
check Phone version
→
PHONE : I9500XXXX or
PHONE : unknown
Abnormal
Check the CP_VSD1,CP_VSD2_1.8V
CP_VSD1 (C352) =0.9~1.4V
CP_VSD2 (C353) = 1.8V
