Question about RCA P60920BL 60" Rear Projection Television

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Fuses Ok, my uncle is an electrician, he'll probably have one of those meters. Where do I plug the meter in? Do I need to take apart the back of the tv? Thanks again, James

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  • RCA Master
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Yes unplug the set, take off the back then have your your uncle show you have to test the fuse for continuity. Its easy

Posted on Mar 05, 2008

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Vs-508r model # info, does this have a replaceable fuse and if so, where is it?


Analog Mitsubishi Rear Projection Television technology from 1986?
Most repair technicians would refer you to a museum for an archaeologist.

Here's a site from which one can request pricing:
http://www.analogalley.com/m_mitsub.htm

Here's a Mitsubishi VS-508R service manual (a photocopy for $25):
http://www.mikesmanuals.com/Manuals_Details_943.htm

Here's another xerox copy for $25:
http://www.tubemanuals.com/Tube_Details_943.htm

Aside from an expensive old manual, find a handy/electronics friend, have them take the back off the set, and hunt around for something burnt in the power supply, or even a blown fuse (or both). There's not a technician alive that'll need a manual to find a blown fuse.
Back in 1986, they would have used a good old Buss fuse - probably in a fuse holder, but perhaps soldered directly to a discrete component laden PC board.

Here's a way-too-large photo of a Buss fuse (actual size is about 1 inch (2.54cm). From the intact filament in the photo, you can tell that the fuse in the photograph is still good (un-blown).
The condition of fuses can be checked with (a) continuity checker, (b) DMM (Digital MultiMeter), or (c) VOM (Volt OhmMeter). But the fuse must be withdrawn from the circuit before testing with any of the above 3 categories of meters.

12_13_2011_5_15_01_am.jpeg
Fig 1. Buss Fuse - fuse specs are engraved on the end (barely visible in this photo)

Replace a blown fuse with a fuse with identical specs.
Replacement fuses are available at Radio Shack:
http://www.radioshack.com/family/index.jsp?categoryId=2032301

Dec 12, 2011 | Mitsubishi Televison & Video

1 Answer

Ws 55511 no blinking light possible lightning run in. checked pico fuses and glass fuse-both ok. I have no continuity across pc9a21. Everything was plugged into a surge protector and nothing that was...


Just what kind of component is PC9A21. In other cases, check all grounds on the under neath of both the power supply and the convergence board. You must really inspect for these, grounds in this case are far to common on this TV. The next board to inspect will be the convergence board. I was surprised at how many bad grounds this board will have. The pins connecting the convergence IC to the board are also in need of resoldering! And, most certainly, really eveball the connections that have jumper cables connecting these two boards. This area is terrible for grounds. If one side is bad, you know the connection on the other, is also bad! Before you reinstall these boards,please check you capacitors ESR. You will need to have an ESR meter for this. One bad capacitor can cause a dead TV symptom.This meter may be purchased for about $50.00. This will be a very good investment. You will be able to repair many, many electronic gadgets with one! Thanks for asking and show all hands of support!

May 02, 2011 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

KP-51WS510 SONY


this is about a 6 on the skill level of tech you need to be able to solder good and need to have a meter to check various fuses and resistors

Jan 23, 2010 | Sony KP-51WS510 51" Rear Projection...

1 Answer

TV will not turn on


Good Morning Chris,
OK, first of all lets unplug the TV and wait 15 minutes for the High Voltage to discharge.
Remove the back and follow the power cord to the power supply. Somewhere around there you should find a fuse. (there may be more than one) get a bright light to look inside and try to find as many fuses as you can. Remove each fuse one at a time and check them with an ohm meter.
If you don't get a good solid reading on any of them replace the fuse or fuses with the exact same rating. Even if you get a reading and the display is jumping around and will not stablize, replace the fuse. Usually a good fuse taken out of the circuit will display a good steady reading on the meter.
I hope this solves your problem.
Have a great day!

Mar 26, 2009 | Philips Magnavox 50ML8105D 50" HDTV DLP TV

1 Answer

ICS


i'm guessing your talkin about convergance ic's. if so they are located on the biggest heat sync in the set. should be two ic's on it, enless it is one huge ic's.
The fuses are usually located at the back of the set usually next to a small transformer. they are usually not glass fuses but solid green small and they are soldered in the board. you can check them with any ohm meter and they should check shorted. your meter should read 0 when you test them.
you may have to hold your meter on the fuse for up to 10 seconds to make sure it stays on 0.
the ic's are flat and sit up vertically on the heat sync.
if your confused and dont want to try it, then i would recomend you get a local service center to do it for you.

Apr 24, 2008 | Mitsubishi WS-65809 65" Rear Projection...

2 Answers

TV powers off 1 second after turning on


If you know what your doing the first step would be to check the fuses . They are not all glass fuses , some look like resistors but do not have the color bands . Most of the time you'll see them close to the transformer in the power supply in the secondary section . Some are green or yellow . Once you find them you''ll need either the schematic to trace where they go or follow there path when you have found the bad ones to see what section they go to . Sometimes it the convergence section or your picture tubes may be leaking on the signal board (which is on the left side) or possibly a bad flyback transformer . Some power supplys had loose connections by the secondary transformer or possible caps that buldge at the top of them by the flyback transformer . They were 100uf @ 250v caps . All of this could be tested with a volt-ohm meter and set should be unplugged . If your picture tubes are leaking you'll see with a flashlight a pool a coolant on the board . Sometimes it could be as small as 50 cent coin . Look at the metal shield suurounding the tubes then look below on the board . Hopefully this is not your problem . Good luck

Apr 20, 2008 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Toshiba TV 50HX81


Check fuses on Power Supply board (F850, F851, F852) and all other fuses. Replace blown fuses (will need an ohm meter to check fuses). I would also replace the two convergence amps (STK392-110's on the signal board, the big black ICs on the two heat sinks). This worked for me.

Mar 30, 2008 | Toshiba 50HX81 50" Rear Projection...

1 Answer

Will not turn back on


Take off back cover. The problem power board is to the right of the board where the power plug feeds into the TV. There is a large white fuse right bend the power plug. With a meter it read ok; about 8 inches deeper into the TV on that board was the resister next to two fuses. My 4 amp 125 volt fuse did not read on my meter. After replacing, it worked fine.

Feb 12, 2008 | Pioneer SD-P50A3Q 50" Rear Projection...

1 Answer

Pioneer Pro-118 won't turn on


Take off back cover. The problem power board is to the right of the board where the power plug feeds into the TV. There is a large white fuse right bend the power plug. With a meter it read ok; about 8 inches deeper into the TV on that board was the resister next to two fuses. My 4 amp 125 volt fuse did not read on my meter. After replacing, it worked fine. Check all three fuses while you're in there.

Feb 12, 2008 | Pioneer PRO-200 60" Rear Projection...

1 Answer

Fuse Locations


If E907 is open it's merely a symptom and NOT the cause. That said, there are several pico fuses in that unit. The three main are E903, E904 and E907 Hitachi p/n#AZ00106M If any or all of these are open it is an indication of a problem associated with the deflection board. Hitachi uses tiny yellow pico fuses. Most common are yellow and green. The "E907" is going to be printed right on the board next to the component it identifies. This is known as a location number. But let's get onto solving your problem... The fuse is not going to be the resolution. Having the deflection board repaired will. The regulator IC902 (remember that's a location number) is an STRF6628 it together with the horizontal output transistor and other components need to be tested to find out which culprit opened your pico(s). For this you'll need at a minimum a DMM meter, and ESR meter and a 20mHz scope. If you're lacking any of these you stand about as much chance of doing this repair as you do winning the lotto - - three times in a row... But, you could pull the board and send it in to PTS Electronics who rebuilds boards for a flat fee... problem there is it will be torn down and waiting a week or two and if you have no memory for all those wires, and where they go when you get the board back,,,, well I wouldn't give that idea much hope.. Lastly, the alternative, is calling a reputable shop and have them estimate the repair. If you can take it into them you''ll cut the cost significantly. And if you're not sure where to find a reputable shop contact NESDA and have them give you a referral to one of their member shops in your area.. Hope some of this helps.. Good Luck Bill

Jun 06, 2007 | Hitachi 51UWX20B 51" Rear Projection...

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