Question about RCA P60920BL 60" Rear Projection Television

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Fuses part 2

Ok, and if it a bad fuse, can I get one of these myself, or should I call the repair people and tell them its a fuse problem.

Any idea on the cost of a fuse?

Thank you so much,
James

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  • RCA Master
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If the fuse is bad get the ratings off fuse and go to radio shack. Cost under a dollar, In fact bring the bad one with you.

Posted on Mar 05, 2008

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How do you focus a sony 62 inch rear projection tv


The two chips it uses (likely stk-392-560 are bad and need to be replaced and there are two pico fuses on the power board that may be bad also.)

Nov 28, 2012 | Projection Televisions

1 Answer

Dear SD Tech, My WS-65711 suddenly stopped turning on. It will click the relay and turn on the front panel light for a couple of seconds and then turn off. I did the self diagnostics and got 2 blinks,...


Hi,

It seems that SD tech is not available at this moment unless he might have answered this question. I would be glad to help you to fix this problem.

the code 2-2 does indicates a short protect fault, which is usually caused by a failure in the convergence section. This is a very common repair in these sets. The typical repair involves replacing the convergence ICs (integrated circuits), and testing/replacing two small pico fuses.

The replacement ICs for your set are part number: STKxxx-xxx and are available from www.encompassparts.com for $19.95 each (needs two). You will also need at least one (likely two) 5 Amp pico fuses. If you wish to repair this yourself, the ICs are located on the large heat sink on the center (Power) PC board. The fuses are also on this board, near the center, location numbers: F9A04 and F9A05. You would need soldering equipment and very good soldering skills to replace these parts.

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If you were to call a local shop to repair this, the labor to replace these is roughly $250-275 (in my area) if the TV were brought in to the shop. Please add a trip charge if repaired in the home.

The fuses must be tested with a multimeter to see if they are bad. They are only $2.50 each, so most people without a meter just change them both. If the repair has any problems, like a solder bridge, you may need a meter to check them after that. A good magnifying glass helps prevent solder bridges (for me, anyway).

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Dec 02, 2010 | Mitsubishi WS-65711 65" Rear Projection...

1 Answer

Mitsubishi ws-65907 tv will not power on


one of the two pico fuses that protect the convergence chips this model uses is gone--see attached photo--

NEVER change just the fuses---if one of the two fuses is blown--the convergence chips got them-----

there are several ways to proceed from here-check the two fuses indicated in the photo and tell me if either or both are bad.

SD TECH

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Jan 03, 2010 | Mitsubishi WS-65907 65" Rear Projection...

1 Answer

2 blinks and then 2 again dead set


WS-55809?.

Usually this means in this set one of the two pico fuses that protect the convergence circuit is blown.

This model uses two of the STK-392-570 CONVERGENCE IC'S.

What you need to do first if you are able is remove the back cover and locate the fuses---I can tell you where they are on the board. Check both of them just like you would check any fuse. If either or both are blown----you have found your problem. The set will detect if either or both are bad that no voltage is reaching the Convergence circuit and it will shut off.


I can tell you the least expensive place to get the parts and I have step by step start to finish instructions for this repair if you are handy and know how to solder etc.

Considering the total parts cost would be under 25 dollars--if you can do this repair you can save a lot of money--most shops get 300-400 for this kind of repair----I know as I have done hundreds of these repairs----did a Mitsubishi a few days ago with the same two chips bad---about one hour for me in the customer's home.

I have START TO FINISH, STEP BY STEP INSTRUCTIONS FOR THIS REPAIR IN THIS SET.

I have photos of the fuses and location also--if you decide you want the instructions and photos we will find a way to get them to you. I am not permitted to give MY email address here--if you know what I mean.

If you have ANY QUESTIONS OR WANT the instructions etc---let me know--I am here to help and I do know a lot about this type of set.

First thing is for you to find out if either of the fuses is gone----if they are----you MUST change both chips and or fuses etc.

IF this information has helped you, rate this solution as I do this here for FREE.


SD TECH


Nov 12, 2009 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Mitsubshi WS-65909Error code 2-2. i would like to know how to fix


The fuses are not the only problem--if 2,2 error code 95% of the time the Convergence IC that the WS-65909 uses is bad. It is a STK-393-110----fuses are on the same board and near the middle towards the back---they are green in color and look like resistors--if you have this model the location numbers marked on top of the board will be F9A04 and F9A05----both are 5 amp fuses (this will also be marked on the board) they are 2 of about 5 fuses and are towards the rear of the row of pico fuses.


If you check the fuses (just like any other fuse) and either is open--You need to remove the center board and replace the STK chip and the fuses-----not everyone can do this repair themselves--

I have had so many people ask me about this problem that I have composed step by step start to finish instructions for this repair--If you have some skill at soldering and think you can remove the board safely let me know and I will post the instructions here for you to read.

Other than the fuses there are about 12 light blue resistors in front of them that need to be checked--if any are discolored they need to be replaced also--they are all low value resistors--3.9 ohms--they will check like a fuse--no reading and or discolored and you need to replace them.

Considering the parts cost is usually under 20 dollars--I can also tell you the best place to buy the chip--you can if you can do the repair save a lot of money--most shops get 300-400 for this type of repair.

If you find the fuse or fuses bad---do not bypass or replace them--the only thing that gets them is the convergence chip.

If you have any questions or need advice let me know--I am here to help people.

SD TECH

Oct 19, 2009 | Mitsubishi WS-65909 65" Rear Projection...

1 Answer

REd light blinking on my 50HX81 CRT TV- Toshiba,no pic no sound


Two possible easy ways to find what the problem is:

1.) Locate F850 and F851 on the power supply board--they are fuses but not glass--little green or orange pico fuses---both will have the location marked on the top of the board.(THEY look like a small resistor)

2.) They protect the Convergence circuit on this set and if either is open (blown) the set will go into shutdown.

3.) If you find one is bad (or both) someone needs to locate the TWO convergence IC's that this set uses--they are located on large metal heat sinks side by side and are black in color with 18 pins each---2 1/2 inches wide X 1 1/2 inches tall and Black in color---they will have the STK-392-110 printed on them in white.

4.) The idea here is if the fuses are blown you need to gain access to the two chips and UNSOLDER all 18 pins on each of them--if either of the fuses are bad you replace them and with the chips unsoldered turn the set on---if it comes on and stays on the Convergence will be out the window--but you will know one or both chips are bad.

5.) If depends on if you are able to do this---the repair is fairly easy---hard part is getting at the chips---You need to replace BOTH of them AND check all the resistors around them (like checking a fuse--no reading across one means it is gone---This set uses several 1.8 ohm protect resistors for this---


If you find either of the fuses bad---you have to decide if you can do the repair or need someone to do it for you----IF EITHER FUSE IS BAD--DO NOT BYPASS IT OR REPLACE IT- a waste of time and doing that may just cause more damage.


Let me know if you find one or both 5 amp fuses bad.

REGARDS, SD TECH

Oct 10, 2009 | Toshiba 50HX81 50" Rear Projection...

1 Answer

Powerout


i changed the fuses today plugged it all back in at wamo it works perfectly. it was 904 and 905 both 5 amp fuses. i am not i repair guy and was able to do this myself.... Hope that help

Dec 28, 2008 | Mitsubishi WS-55809 55" Rear Projection...

1 Answer

Toshiba 50H72 problem plz help!


ok well both of you have had the same problem i did... to fix the picture problem check the circuit board pd0074 its the yellowish looking one next to the green one which has the ic's on them... ok on the pd0074 board look for fuses f470, f850, and the f851 to see if they are blown the f470 is what turns the tv on and the f850 and f851 are what protect the convergence ic's chances are they are blown.... the sound i don't know how to fix that problem but i would check all the fuses on that board to find out if one more is blown that what i did but the only thing is that i could get the actually fuses for the tv i was told by a tv repairman in my town to just take 2 wires sodder them on to the fuse and take a glass fuse and put electrical tape around them and it worked like a charm... so i hope this helps you.... the most i spent was 30 dollars for the ic's and the fuses all together and i was quoted at 450 to do what i did myself

Oct 31, 2008 | Toshiba 50H72 50" Rear Projection...

1 Answer

Won't power on...


Unplug the TV for a minute then plug it in while observing the power light. If the light flashes three times then the standby power supply is OK.

If the standby power supply is OK, a diagnostic code can be read from the green power light by counting the flashes. Press the power button once (this sets the diagnostic code). Press and hold the INPUT and MENU buttons on the fron panel for 5 seconds then release. The green light flash a two digit code (x flashes, followed by a pause, then y flashes). If it flashes a 2-2 code then a short circuit has been detected in the switched power supply. It would normally flash a 1-2 code for "no problem detected".

If a 2-2 code is read, check for blown pico fuses on the POWER circuit board. If the FA904 or FA905 fuses are blown then most likely at least one of the two convergence driver ICs are bad. It seems like this is the most common failure. I replaced these fuses and ICs in my TV. The parts cost me $50, but it required extensive disassembly, PC board desoldering & resoldering, and reassembly. If you can resolder circuits on a PC board then you can probably fix it yourself, otherwise call a repair person.

Sep 07, 2008 | Mitsubishi WS-65807 65" Rear Projection...

1 Answer

Rear projection tv hitachi


when it snaps its most likely a tube that shorted or flyback that went bad.

May 31, 2007 | Hitachi 50V710 50" Rear Projection...

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