Matsushita CF-08TX1A1M manual Troubleshooting

5.2. Troubleshooting

Please take note of the following two points with regard to troubleshooting:

1.Know-how of diagnosis upon occurrence of heavy troubles, e.g. ‘Set cannot be turned ON’, ‘Set fails to start’, ‘No display on screen’, etc.

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.

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