4. TROUBLE SHOOTING
- 86 -
START
No
Power is supplied to
the board?
Yes
Refer to
Power On Trouble
Connection between
FPCB and boards is OK?
No
Reconnect
FPCB
Yes
CN600 is soldered well?
No
Re-solder the CN600
Yes
Paths of LCD control
signals are OK?
No
Re-solder
the EMI filter
Yes
FPCB is OK?
No
Replace the FPCB
Yes
Connection between
FPCB&LCD Module is OK?
No
Resolder
The CN104 of FPCB
Yes
After changing the board,
LCD Display is OK?
No
The board is broken.
Change the board.
Yes
LCD Module is out of order.
Change the LCD Module.
Checking Flow
Z3X-BOX.COM
Summary of Contents for MG300d
Page 23: ...3 TECHNICAL BRIEF 24 Figure 3 1 SKY74400 FUNCTIONAL BLOCK DIAGRAM Z 3 X B O X C O M ...
Page 83: ...4 TROUBLE SHOOTING 84 4 6 LCD Trouble EMI FILTER CN600 Test Points Z 3 X B O X C O M ...
Page 110: ...5 DOWNLOAD AND CALIBRATION 111 8 Push the START button Z 3 X B O X C O M ...
Page 111: ...5 DOWNLOAD AND CALIBRATION 112 9 Phone test Finish is shown in below screen Z 3 X B O X C O M ...
Page 112: ...6 BLOCK DIAGRAM 113 6 BLOCK DIAGRAM Z 3 X B O X C O M ...
Page 113: ... 114 Z 3 X B O X C O M ...
Page 124: ... 125 MG300d 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 125: ... 126 MG300d 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 137: ... 138 Z 3 X B O X C O M ...
Page 138: ... 139 Z 3 X B O X C O M ...
Page 140: ... 141 12 EXPLODED VIEW REPLACEMENT PART LIST Z 3 X B O X C O M ...
Page 141: ... 142 Z 3 X B O X C O M ...