I have a 1997 mitsubishi 50 in. rear screen projector and one tube under the red projector seems to spark every once and a while to about every 3 seconds, but the picture and every thing work great, anyone know how to solve this problem???? new tube??
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Pull the Front Bottom panel off under screen will be screws that hol pn screen remove all of them then lift up on screen anf remove it Now you should be where Mirror and Tubes Clean all lenses and mirror with windex.
According to the manual:
1) go to the "TV Main Menu"
2) Select "Screen"
3) Select Adjust Projection TV (obviously only if a projection TV).
This then allows you to adjust the TV's 3-colors. Selecting GREEN CENTERING brings up a control panel that lets you center the green projection tube on the screen. Selecting RED CONVERGENCE or BLUE CONVERGENCE lets you align the Red & Blue projector tubes. Centre the green projector tube 1st. Then adjust the red & blue until the test pattern on the TV screen appers white.
take off the front panel carefully, usually 2 screws around the controls. Next, stick your head in and look at the red green and blue tubes. see if they are dirty? if, not look further into the tube using aflaslight and see if there is a white pasty looking substance inside. IF so, you need to clean as you have bacteria growing in the cooling fluid. A big job and you need the gaskets, can order from Mitsubishi tech support..good luck be careful.
The set is old and the picture tubes are probably weak. you can pop off the front grill, remove the protective panel to expose the picture tube sockets. On the sockets are controls to increase or decrease the intensity of the colors. The red is on the left ,green center and blue right. Go to a B&W picture or turn the color off, then adjust for the best grey screen.
Is the power light staying on? If so press imput and menu together for 5 seconds to see if the set will blink a 2 digit repeating code. If that doesnt work. Check for CRT coolant leaks on the boards. This seems to happen alot as do faulty capacitors. Coolant leaks will be located on the chassis directly under the tubes they can cause corrosion and prevent your set from starting especially in the VS models.
Look in your menu for something called "horizontal static convergence" or just "convergence". Adjusting this will align all three tubes electronically. If physical adjustment is needed, then you have to do this manually inside the Tv. keever