Question about Projection Televisions
I Forgot password to open up Mitsubishi TV model VS-4503R projection TV. It's 4 numbers that are a password number to open up the TV. I was hoping to get like a default 4 number pass to open up and recieve input signals. Does anyone know ??
SOURCE: Mitsubishi 60 inch projection
They are not BULBS by any stretch of the imagination. They are CRTs (Cathode Ray Tubes, also known as "picture tubes," and each of them are small television screens, in essence), which are optically enlarged for projection onto the back of the front screen. Don't be tempted to think that you will merely be able to replace a "bulb" and have everything work!
Although you will be able to replace all of the components on the PC board if necessary (they all remain available), and may be able to fix the coolant leak that caused the failure, the CRT may have overheated. Considering the advanced age of the television, the tubes are likely already somewhat burned-in. Best to just dispose of the set.
Posted on Nov 20, 2007
This model was first made in 2002 and is a V21 Mitsubishi chassis.
I presume the front input or device button does not do anything.
This (if it is a WS-55511) has an option code that can be accessed. It will reset everything back to the condition the set was in when it was new in the box; once executed you will have to put it in the cable band and autoprogram it----email me if you need instructions for this and I will give them to you.
If this was helpful I would appreciate a vote from you.
Posted on Aug 12, 2009
the Lamp ok? Go to the rear of the set and turn on the set with your
remote while looking at the vent slats. If you can see a bright light
through the vent slats then your Lamp is working. If the lamp is on and
you have sound and no pix, then the Digital bd is in what we call
"Video Mute" and will have to be replaced. Also make sure that the Lamp
Door is installed and the screws are tight
also check to ensure the following.....
1. re-seating the DVI cable on both sides
2. Check to be sure the lamp door sensor is closing (that is not your issue but i thought i would post the complete answer)
3. Check colorwheel is spinning up (should be a low hum, and not sound like a fan)
*** it is very possible it is a failed colorwheel, but the set should go into shutdown, so it is probably not the issue.
4. If the set has sound but no picture replace DMD board....
If the set is working and then just stops working best bet is the DMD ( i would not replace just the dmd it is cheaper in most cases and much easier to replace the lightengine) but if the set just is not working and just failed and is now always not working best bet is the digital board.
If you have an osciloscope you can measure the video signal from the Digital board and see if it is present with the no picture, if it is then it is a bad DMD but if the video signal disappears of then you have a failed Digital board. You can not us a computer USB scope, they can not read most of the data from the digital board since they use multiple scan rates and wont trigger on them for some reason, a old school scope works best i have found, or one of those new LCD scopes that have an auto trigger work well i have found that it is all i use anymore.
you can find a service manual with schematics at a very cheap price at ebay......
Posted on Aug 30, 2010
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