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Are all the connectors 
inside the power unit tightly 
connected?

Insert the connectors 
CN7105, 7103, 7101AND 
7102 tightly.

Replace the bimetal switch 
or press the red button to 
reset.

Tighten up the lamp door 
closed with the screws.

Is the lamp cover closed 
completely?

Replace F7002.

Check the circuits leading 
to the secondary side of 
T7002 for damage. 
Replace any of them as 
required.

Is the bimetal switch off?

Is AC voltage applied 
across L7005?

Replace F7001.

Is AC voltage applied 
across the RL7001 relay?

Are there the specified 
voltages at the output 
terminals of CN7101 and 
CN7102?

Check the circuits leading 
to the primary side of 
T7002 for damage. 
Replace any of them as 
required.

Is there DC voltage of 
about 340 V across 
CN7003?

Check the peripheral 
circuits of Q7101~Q7107. 
Replace any of them as 
required.

Is there DC voltage of 
about 6 V across C7151?

Check the output PWB 
circuits.

Check the basic signal flow. The signal flow from 
CVIC_IC to the panel output is the same for the 
component and video signals. Therefore the lines 
after CVIC are not checked. (The 480i and 580i 
component signals are not included.)

The signal flows through the same circuits as the 
DTV RGB signal does. Check the SOG (Sync On 
Green) circuit and the color adjustment circuit. (The 
480i and 580i component signals are not included.)

The video signal flows through a different route from 
the RGB input signal, and goes into CVIC_IC. 
Therefore check the video signal ICs.

Check the D-SUB input.

Is the user menu properly 
displayed?

Check the on-screen 
display.

Check the DTV RGB 
input.

Check the VIDEO input.

Check the DTV 
component input.

End

Check the D-SUB input.

Feed the sync-separated DTV 
RGB signal to INPUT1 or 
INPUT2.  (The 480i and 580i 
component signals are not 
included.)

Check to see if the video input is 
as specified.

Is the contour as specified?

Using the front-panel key or 
the remote control, select 
INPUT1 or INPUT2.

Is the image disturbed?

Go to "Checking the sync signal".

Do R, G and B colors appear?

Go to "Checking the RGB signal".

IC8004 or its peripheral circuit 
defective.

End

Does the image appear?

Is the input signal setting 
as specified?

Select the specified signal.

Is the connector properly 
connected?

Reconnect the connector.

End

Make sure the input signal 
setting is as specified.

Check the sync signal.

Is there the video signal at 
the land of C8077?

Input PWB defective.

IC8025 or IC8004 
defective.