2003 Mit. WS-B55 (V21 chassis) turns on OK at first, then becomes unstable, picture flutters, then shuts down. It may stay on for a minute when first fired up. It turns back on, but shuts down in a matter of seconds; eventually, it refuses to turn on until it cools down for a few minutes. I've replaced the 7 capacitors on the DM board, with no change.
I procured the service manual but it doesn't really delve into troubleshooting.
Does anyone with good experience on this chassis have any suggestions so i don't waste a lot of time looking in the wrong places? The garage is bitter cold, so it the less time I spend out there, the better.
Check for open pico fuse in power supply caused
by bad convergence I.C.Get pro help-you have a good set to save.Remember--practice visual acuity technique!And,above all else,do no harm!!
Did you repair the two leads? Ao check near the Convergence ICs for an open resistor or two, although that shouldn't effect your audio. Yu most likely have a low voltage regulator or bad capacitor. You will probably need the service manual to actually track it down. I will post a link where you can ge one for 12.99 and the include free unlimited support. They will also email it instantly to you if you return to the site and send them an email requesting they email it to you. You sound like you could fx it with the service manual and some guidance. Here is the link. http://servicemanuals.vstore.ca/
This is the most common problem for rear projection tvs and it is known
as the color convergence problem.You will need to replace or repair its
ics to solve it.
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Your model is the V21 chassis it requires the single IC STK393-110 you will also need 2 5 amp pico fuses. The convergence repair kit is available for your model at www.tvrepairworld.com which contains the IC, heat sink paste, the pico fuses and the CD with repair instructions and other service info for that model.
Have
you misplaced your Mitsubishi WS-B55 HDTV Owners Manual?
Would
you like a digital, searchable, pdf version of the Mitsubishi WS-B55
HDTV Users Guide? Follow this link to download a pdf
version of the operations manual.
Call a good TV Tech and tell him to replace the Capacitors in the DM Module. There are some 2200uf and some 1000uf at 16 volt capacitors that should be upgraded to 25 volts instead of the original 16 volts. This is a common problem for the V21 Mitsubishi Chassis.
you need the V21/V19 DM repair kit which is available at the following link which has the replacement capacitors and the step by step instructions with pictures.
Would you like to bypass, defeat or reset your Mitsubishi HDTV Parental V-Chip parental lock? Have you forgotten your V-Chip passcode or password?
If you forget your V-Chip passcode, you can view the locked TV without entering your password.
When your passcode is requested, press the number 9 and the QV button on the original TV remote control at the same time. This process temporarily unlocks your TV.
When you enter the V-Chip Lock menu, pressing the number 9 and the QV button on the original TV remote control at the same time will delete your old password and prompt you to enter a new passcode. Pressing HOME at this time will cancel the entire passcode.
Would you like to bypass, defeat or reset your Mitsubishi HDTV Front Button lock?
If you have misplaced your remote control, and have engaged the Mitsubishi HDTV Front Button Lock, you can bypass the front button lock by pressing and holding the MENU button on the front panel for more than 8 seconds.
You have the V21 chassis when the led blinks constantly you need the V21/V19 DM repair kit which has the parts and step by step instructions with pictures on how to do the repair. And its less than 40.00 for the entire kit with free shipping. Here is the link its listed under the repair kit category. http://servicemanuals.vstore.ca/
Your chassis V21, 2002 model TV has a problem, but to determine what, try this; press the 'input' and 'menu' buttons on the TV"s front panel for at least 10 seconds. Count the blinks (after releasing); eg blink, blink pause 6 blinks = code 26. The code will repeat 3 x's. The most common problem is the convergence IC's are bad or fluid on the boards.
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