No Service - Samsung SM-A510FD Service Manual

8. Level 3 Repair

8-4-3. No Service

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