HL720S/D Service Manual
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TROUBLESHOOTING
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No operating at all
What you see
Suggested Actions
Is the power inserted correctly?
Insert the plug correctly referring to the User Manual.
Does the Power Adapter operate
correctly?
Check the Power Adapter.
The green LED is OK.
The Power Adapter operates
correctly, but the LCD Monitor does
not operate correctly.
Check the harness of the FUNC. B/D.
Does The Power On/Off and the
LED Operate corretly?
If the program of the MICOM is error, then exchange the
MICOM.
If the AD B/D is error, then exchange the AD B/D.
The Power On/Off and the LED
operate correctly, but the OSD
menu doesn’t display on screen.
First, operate the FACTORY SET.
Second, check the Panel Harness that is connected to
the AD B/D.
Check the LAMP Harness of the Panel.
Lastly, exchange the LIPS.
The OSD menu operates correctly
but the image doesn’t display on
screen.
Insert the SIGNAL Cable correctly referring to the User
Manual.
Check the LAMP Harness of Panel and Inverter.
Lastly, Check the LAMP of Panel.
The Power On/Off operates
correctly, but the screen is ‘ALL
WHITE’.
The LAMP is OK.
Check the Panel Harness that is connected to the AD
B/D.
The Power On/Off operates
correctly, but the screen is ‘ALL
BLACK’.
Check the LAMP Cable.
Check or exchange the LIPS.
Check the Panel Cable.
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