No Service - Samsung SM-M307F Service Manual

8. Level 3 Repair

8-4-3. No Service

No service
Home screen → Phone →
Keypad → *#1234# → Check
Phone version → CP :
N950FXXXX or unkown
Check the Voltage
L5008 : 1.3V, C5084 : 1.3V
Check the clock OSC5000
Is the frequency 32.768KHz?
Replace the U2016
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Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
END
CP : A505XXXXX
Check the connection of RF coaxial cable
No
Replace the U5000
No
Replace the OSC5000