5.2. Troubleshooting
Please take note of the following two points with regard to troubleshooting:
1.
2.Explanation of each trouble, mainly symptom of trouble in operation.
Flow Chart
STSTARTT
Pay attention to the following points when in pursuit of the cause of a troubleshooting.
1.Peripheral apparatus connected with the set should all be removed before operation check.
2.Make sure that cables, boards, etc. are not coming off, and recheck the contact condition.
Set cannot be supplied with current. Power lamp fails to light up.
Power unit | NG |
| |
Output voltage |
|
OK
Replace power unit.
Power lamp
NO
Check contact condition of power input terminal. Replace if
Dark display on screen. Screen fails to display.
Failure in starting
check
YES
Inverter NG Board input/output
voltage OK
NO
LCD back
light lighting
YES
operating check | NO |
|
YES
Result of NG Selt Test Program
OK
Check SW cable continuity. Replace if defective.
Check SW board connection and contact. Replace if defective.
Replace inverter board. (Check if fuse is broken).
Check inverter cable continuity. Replace if defective
Replace LCD back light.
Heavy trouble e.g., ‘Set cannot be turned ON’, ‘Set fails to start’, ‘No display on
Replace main boardscreen’, etc. (Check fuse at power source).
Replace main board.
Lines appearing on screen. Part of block displayed Properly on screen.
Touch screen cannot be input.
Starts but operates unstably.
|
| Replace | NG |
|
| ||
|
| LCD Unit for trial. |
|
|
|
|
|
|
| OK |
|
|
| Replace | |
| Replace LVDS board and cable. |
| main board | ||||
|
|
|
|
|
| for trial. | |
|
|
|
|
|
| ||
OK
Replace main board.
Make sure of contact of Touch screen connector in use.
Replace Touch screen or main board. .
Reinstall firmware/software.
Replace main board.
STARTEND
Each kind of trouble in operation.
