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8. Level 3 Repair
8-4-3. No Service
Yes
END
Check the Voltage
C4057 : 0.915V, C4030 : 0.87V
C4068 : 1.8V, C4088 : 1.8V
No
Replace the U5005
no
No
Replace the OSC5000
Replace the UCP4000
Yes
No service
Yes
Home screen
→
Phone
→
Keypad
→
*#1234#
→
Check Phone version
→
CP : A920FXXXX
Yes
Check the connection of RF coaxial cable
Check the clock OSC5000.
Is the frequency 38.4MHz?
Yes