Question about Mitsubishi VS-50607 50" Rear Projection Television
I have a Mitsubishi VS-50607 Big Screen, built in 2000. During the past year or so, on occassion the unit would turn off by itself. This has progressively become worse, to the point that it very seldom goes on at all, and if it does, it only stays on for a very short period of time before turning off again.
I ran a code check and got a Code 24. I proceeded to remove the chassis and replace the C411 and C412 Electrolycic Caps located in the V Hold section. The TV turned on and actually stayed on for about an hour, but now it's back to the same old same old, either shutting off right after it is turned on, or if I'm lucky, it stays on for a minute or two. Each time I have unplugged the set for at least a few minutes so as to clear the code in order to turn the set back on.
It should also be noted that here is NO leakage from the CRT's down on the chassis circuit boards. When the TV does actually power up, the picture is clear. Usually before the TV turns off, the picture will turn into a blur RGB line across the screen, but I suspect this is due to the set possibly trying to turn itself off but doesn't entirely because the problem is just starting to act up.
I have a lot of electronic experience because of my work, although it doesn't involve TV repair. I just need to be guided as to what other area(s) should be looked at. I suspect a weak capacitor(s). Sometimes I've been lucky in that the set has stayed on for days or weeks, but that's not the case now which leads me to believe a cap has gotten worse.
Any help from you TV techs out there would be greatly appreciated. I am currently laid off and money is very tight, so a trip to the TV repair shop is not an option at this time.
Its just a condenser(capacitor) ..so just try to locate it ..from the image board..cause Im sure that all this time the sound its still on ...just carefully measure 'em all and locate it ...after that just change it with another one or try to put something similar on the same size.. I can not tell you the exact one cause Im not familiar with the model ...but I do had this problem with the concentrated horizontal (middle screen ) line ...and always was about this ....
Posted on Jul 30, 2009
I am wondering you the cap replacement worked for a short time and then those suddenly got bad due to another issue in your power supply?
Normally a bad cap would be the cause and that was what i was going to suggest you may want to check the FUSES and make sure there not weak and just slowly causing more issues within the caps.
TV's are a hard subject of repair on Fixya because I am not actually there looking at all the boards inside this TV. All I can do is suggest and give advise on what to look at next. I would suspect putting a higher cap on the voltage level not the macfiads keep the UF rating the same but upper the voltage a tad and make sure you using high quality caps. Also check fuses not the fuses that have the glass in them the blue ones that are soldered.
Also check solder joints for weak spots.
If you have any further questions please reply, If you like my suggestions please accept the solution.
Thanks for using Fixya.com
Posted on Jul 29, 2009
Problem seems with electrolytic capacitors that got weak / dry.
Do you have repair manual / schematics to troubleshoot or test volts in circuits?
You can download service manual copy from HERE for free. Download all 11 parts / files and unzip it with WinRaR to get PDF file of repair manual. This will help you to check why protection is being activated causing shut down TV.
Posted on Jul 29, 2009
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Posted on Jan 02, 2017
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