By NCK Team
GIN/One Touch 918(N/A/D/S) L2 repair document
ED
1.0
GIN Level 2 Repair Document
21/27
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without authorization
2.Check the battery connection, change
the battery connector if broken;
3.Check the charge plug, change it if
necessary;
Switch on with battery
power
Can „t Switch on
1.Check voltage of the battery;
2.Check the battery contact, change the
battery connector if broken;
3.Check the keypad
4.Check BTB connector socket pin
Main display
Missing line or column; no
display; bad or no LCD
backlight
Check Connection flex (FPC
cable),change it if necessary;
Replace display module if necessary;
Keyboard
Keyboard backlight or
keyboard function
Check keypad film or keypad PCB,
change it if necessary
Vibrator
The vibrator does not work
Check the contact on the PCBA (dirty or
oxidized), replace the vibrator if necessary;
Network Problem
No emission or No reception
Check the antenna contactor on the
PCBA;
Check the contact on the PCBA (dirty or
oxidized);
TF card
No communication between
the phone and the TF card
Check the TF connector on the PCBA;
Camera
Camera doesn't work
Check camera module
Check also camera FPC broken or not
Audio
Bad or no emission (TX audio
from mobile);
Bad or no reception (RX audio
on mobile);
Hands-free problem;
Key beep and melody
problem
Check microphone, replace it if
necessary;
Check the contact on the PCBA (dirty or
oxidized)
Check loud speaker, replace it if
necessary;
Check the contact on the PCBA (dirty or
oxidized)
In case the LEVEL 2 repairs can‟t solve the problem, or if the board is damaged, exchange the board.
6. BOARD EXCHANGE
In case that LEVEL 2 repair does not solve the failure, it is mandatory to change the board and apply the
following process:
1)
Collect the fault PCBA board (without accessories LCD, and camera),
with microphone and vibrator.
2)
Get a new PCBA from swap stock. Reuse those accessories to assemble the mobile.
3)
Fill in the fault sticker with IMEI number, the fault code, the short code, the Hardware Technical Level, and
the software version.
4)
Send the fault PCBA with fault sticker back to L3 repair center with the suggested packaging method, the
detail packaging method please see solution 1 of APPENDIX 2.
7.
OTHER COMPONENT EXCHANGE
The other components exchange like LCD module,vibrator, receiver, speaker, microphone, camera, FPC
connection, audio/camera connector and related mechanical components, please follow the detail steps from
paragraph 7(Disassembly and Reassembly process), but need to be very careful to handle the components with
related special tool or jig (especially replacing new components) and better to handle it with plastic tools
