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7.2.
Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the
defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
7.3.
LCD Panel test mode / FR test mode
Purpose:
To find the possible failure point where in LCD Panel, FR Board or A Board when the abnormal picture is displayed.
Procedure:
Step1. Go into LCD Panel test mode and confirm symptom
While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2
seconds.
The several test patterns generated by LCD Panel are displayed. Judge by the following method.
Still abnormal picture is dislpayed: The cause must be in LCD Panel. Exit test mode.
Normal picture is displayed: The cause must be in A Board or FR Board. Go into FR test mode.
Step2. Go into FR test mode and confirm the symptom
During in LCD Panel test mode, press [OK] button on the remote control.
The test pattern generated by FR board is displayed. Judge by the following method.
Abnormal pictures is displayed: The cause must be in FR Board.
Normal picture is displayed: The casuse must be in A Board.
Step3. How to Exit:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control in LCD Panel test
mode or FR test mode.
Blinking Times
1
3
7
9
12
BACK END SOS
13
EMERGENCY SOS
Contents
BL_SOS
POWER ON
SUB_3.3V/1.2V
SOUND_SOS
16
Check point
LCD Panel / P-Board
A-Board / P-Board
A-Board
A-Board / Speaker
A-Board
A-Board
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