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8. Level 3 Repair
8-4-3. No Service
No service
Home screen
→
Phone
→
Keypad
→
*#1234#
→
check Phone version
→
CP : A510FDXXX or unknown
Check the connection of RF coaxial cable
Replace the OSC2000
Yes
CP : A510FDXXXX
Replace the U5000
CP : unknown
END
Check menu setting
Menu
→
applications
→
setting
→
network connections
→
more networks
→
mobile networks
→
network mode
→
setting is auto connect ?
Check the voltage level
CP_RST_N = HIGH
Check OSC2000
Frequency = 26MHz
Replace UCP400
No
Yes
No
Yes
Yes
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