Keypad issue
Start
Check Key pad is
damaged or not
YES
Replace Keypad
No
Check software version?
And update new software
No
Check
Sidekey fpc
soldering
problem
YES
OVER
YES
Soldering
repair
Replace Main PCBA
No
Not recognize SIM card
Start
Update new software or
Resetting factory
No
Check SIM card
connector whether
damaged?
YES
OVER
YES
Change
J1201&J1203
No
Replace Main PCBA
Summary of Contents for Studio J1
Page 1: ...No 20160406 Studio J1 Service Manual...
Page 5: ...Chart 3 Explode view and Part list 3 1 Explode view...
Page 18: ...Chart 6 Soldering components for L2 repair Main PWB Top 6 1 Component layout...
Page 19: ...Chart 6 Soldering components for L2 repair 6 1 Component layout Main PWB Bottom...
Page 27: ...Chart 8 Main boards layout TOP...
Page 28: ...Bottom...
Page 30: ...Chart 9 Mobile working principle and Fault analysis 9 1 Mobile work principle...
Page 41: ......
