Filter
Top Products
PRECAUTIONS
147
1. PRECAUTIONS ON FUNCTION AND PERFORMANCE OF
SYSTEM
¶ The picture may turn to disorder temporarily due to power discharge inside the CRT tube, but it will recover
automatically after a few seconds. In the new CRT, the very slight amount of impurities remaining inside (in
vacuum) may occasionally evaporate when hit with electron beam. However, this will not occur after the CRT
has been used for 100 to 200 hours.
¶ When the power remains off for some time, it may indicate that a fault has occurred inside. (malfunction of
parts). Turn off the main power switch of the MPJ, and after several seconds, turn it on again.
If the power goes off again, it indicates a fault. If it works normally, it indicates abnormal operations due to
external factor and will not affect operations thereafter.
¶ If the screen color and brightness is abnormal or the switches do not function, turn off the main power switch
once and turn it on again several seconds later.
¶ When the one image (still image and caption) is displayed for a long period of time, the image will stick onto
the screen and cannot be removed. As this is inevitable due to the projection system, it must be resolved
through software contents, displaying method, system structure, etc.
¶ When switching between the VIDEO and Y/C input using the EXT-CONTROL terminal for different TV formats,
the image will be disturbed for several seconds when they are switched automatically even if TV SYSTEM is
set to AUTO.
Example) Image is disturbed. Image is not disturbed.
VIDEO input (NTSC) = Y/C input (PAL) VIDEO input (NTSC) = YY/C input (NTSC)
¶ When the following signals are input, the image may be distorted.
• VCR signal which repeats copying.
• VCR signal with copy-guard.
• Scrambled CATV signal.
• Signal other than NTSC/PAL standard signal
• Signals whose sync signal and video signal phases are considerably different.
(In some cases the centers of H and V cannot adjusted. If adjustments can be performed using the expan-
sion equipment, etc., use it,)
• Signal with extremely narrow feedback period
¶ If the power is repeatedly turned on and off by disconnecting the power cord, the count of the hour meter may
be incorrect. The hour meter serves as a reference for how long the unit has been used, and the operation is not
affected by the count error.
CHAPTER 6. PRECAUTIONS