Shenzhen Walida After-sale Service Department
SG3318 Trouble shooting and maintainence
Replace PCB
Check U400 or U100
Replace PCB
Check if the connection between
clip holder and pins of IC is OK.
SIM Card
Power supply card
1# 16#
2# 14#
3# 15#
4#, 5# 8#
Replace clip holder
Check if the leaf of clip holder
J400 is OK?
Show “Please insert SIM card”
Technical support department
epairing process for
“
Can’t recognize card
”
After-sale
Summary of Contents for SG3318
Page 1: ...Manual for after Sales Services ...
Page 5: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 4 Appearance ...
Page 7: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models ...
Page 16: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models ...
Page 17: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 2 7 2 ...
Page 18: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 3 7 3 ...
Page 19: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 4 7 4 ...
Page 20: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 5 7 5 ...
Page 21: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 6 7 6 ...
Page 22: ...Shenzhen Wanlida After sale Service Department SG3318 Introduction to models 7 7 7 ...