Question about Hitachi Multimedia Projectors
The lpanel ights were blinking red until I changed the lamp time and then they went off a week later There is no power now.
SOURCE: Lamp Nec mt 1050
i have a mt1020 and the switch for the lamp cover might be the problem,find the switch with cover off. push up with small screwdriver, if this works just add some tape to the arm on the cover that pushes the switch up...
Posted on Feb 01, 2008
Heres what the manual says about REd / green lights
Unplug the power cord from the wall outlet and contact your dealer
And also this:
Check that the lens cap is removed.
It may take about one minute for the lamp to light up.
The lamp fails to light up on rare occasions. In such a case, wait for a few minutes
and then try again.
If the projector was turned off before the lamp was cooled down suf? ciently last time,
the fan may start rotating and the POWER button may not work after the power cord
is plugged. After the fan stops rotating, press the POWER button to turn back on the
Check that the intake vent is clean.
Set SCART INPUT in the FEATURE menu to OFF. (See page 25.)
Check that the lamp cover is closed. (See page 33.)
Check that the cables connected to the external devices are not broken.
When an extension cable is being used, replace it with the supplied cable for check. When
images are displayed correctly, add an RGB signal ampli? er to the extension cable.
Check the operation manual of the video device for its connection.
Posted on Mar 14, 2008
First check your lamp to make sure it is seated properly in the socket.
Then check all of your interlocks (see your manual for locations), these are usually located on any hatches or doors that allow access to the lamp and or fan area. Once you check your interlocks make sure the filter and fan area is clear of dust, (some projectors have air flow sensors), and the recheck the interlocks. Once this is done , If the interlocks are not broken, or the lamp fuse blown, the projector should be working. If not it is the lamp that needs changing.
I know this may be expensive, however these lamps do go bad, as much as we wish they would not.
If you still feel it is not the lamp, have a technician check the voltage levels to the lamp and the levels of the control board circuitry.
I hope this helps,
Posted on Nov 20, 2008
Not sure if this helps with the 7200 bu had a 4805 with a failed fan issue. There are two fans inthe unit, one smaller one that cools the color (colour) wheel and the larger one that cools the lamp. This unit had a problem with the larger lamp fan not turning. Unplugged and disassembled the unit to get the fan out and tested the fan using a 9v battery and a couple of wires (best to uplug the fan from the controller board so you are not forcing voltage into the unpowered controller board... that said, I did it hooked up just peeling back the label in the centre of the fan and touching the wires to the solder contacts) The fan worked fine so figured the controller board was the issue, so this wasn't going to be a simple "buy a new fan" issue.
Here is where your mileage may vary...
I decided that it would be OK to just run the fan. Unplugged the fan and powered it from the 9V battery and assembled the unit and powered it up. Found that there was 7v available on the power board at the second pin that was alwasy on when the power switch was on (thats the positive 7 V pin, but measure it with a meter since we are talking about a different projector) and just wired the fan direct to pin 1 and 2 (1 is ground on the 4805, 2 is +7V) and so now whenever the main power is on the fan runs, so after ti cools down I just power off the main power when not in use... or let the fan run if the noise isn't an issue. Crude but effective fix.
Posted on Dec 08, 2009
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