Toshiba TDP-MT400 Service Manual page 27

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3.)
The image displayed with picture noise issue.
-
Press "INPUT" button to re-catch the signal again.
-
Check the signal cable.
-
Check Main BD if there is no picture noise issue when you input the signal with
the other connector.
Judge
-
Change Main board.
4.)
The image displayed with Dead Pixel/Line issue.
-
Check the DMD chip if the bright dot issue when you input the signal.
Judge
-
Change DMD board or DMD chip.
5.)
The image displayed with focus issue.
-
Adjust the focus ring.
-
Ensure the projection distance is in spec.
Judge
-
Change Optical Engine Module
6.)
The image displayed with flicker issue.
-
Check the Lamp Module
-
Ensure the signal cable works well.
-
Press "INPUT" button to re-catch the signal again.
Judge
-
Change Main board or DMD board.
7.)
The image displayed with uniformity issue.
-
Ensure the projection lens is clean.
-
Replace the lamp if the brightness is less than spec.
Judge
-
Change the Optical Engine Module.
8.)
The image displayed with line bar issue.
-
Check if the line bar issue that can be fixed by "Frequency" function of OSD
menu or not.
Judge
-
Change Main board.
C. Audio Troubleshooting
1.)
No Sound
-
Press "VOL-" or "VOL+" button on the keypad and check if the mute function is
enabled.
-
Check Main BD if there is audio sound output when you input the audio signal
with other ports.
-
Check the speaker
Judge
-
Change Keypad BD
3-8
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