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Main circuit board broken - Projection Televisions

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  • RemiDog Oct 03, 2008

    We have a proscan PS 60690 television which we have been told by a repair man requires work on the circuit board. Are we able to gain a circuit board plan or replacement at a reasonable price?

    RemiDog

  • mustafa357 Nov 30, 2008

    I have the same problem for my RCA P52940. I was told the circuit board needs replacing.

  • Anonymous May 05, 2009

    Sony Kdp57xbr2 need part number for Circuit boards A and B



    TV does not turn on and blinks 6 tmes wait 3 seconds then blinks 6 times.

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3 Answers

KDP-57XBR2, need replacement boards

Posted on Aug 26, 2008

Samsung 47 in rear projector model #HCN4727W

Posted on Jul 30, 2008

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  • Projection T... Master
  • 8,617 Answers

What is the make and model number of your set. I can post a link where you can get a replacement board or have your board rebuilt if its not broken beyond repairable limits.

Posted on Apr 07, 2008

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1 Answer

My sharp has sound but no picture a have put it a zgemma box using hbmi cable got sound no picture is there something a need to press for the picture to match the box


Sounds like Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Jul 22, 2016 | Sharp Projection Televisions

1 Answer

37RV530U Toshiba LCD TV. no back light but I see letter on the screen with flash light. I believe it is back light inverter. but I couldn't locate it


Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Jun 03, 2016 | Toshiba Projection Televisions

1 Answer

52 " rca flat screen TV doesn't have a picture anymore. Sound works but no picture. I heard a pop and then no picture. TV is only 2 years old.


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/

To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Feb 24, 2016 | RCA Projection Televisions

2 Answers

NO PICTURE NO SOUND


if blink 6 time,ic regulotor is broken,you must repleace ic 6400 ic mcz3001db

Sep 06, 2009 | Sony Grand WEGA KDF-42WE655 42" Rear...

1 Answer

An Rca tv turns on then immediately turns off. Rca tv model number 20F512T. It has picture, audio, and no blinking lights. I've checked the main board and no problem what so ever. Nothing burned or loose....


If it turns off going standby, and led is on, then it is on protect, and remaining parts must be tested.

If it turns off completely, and you can restart it with the On button, then the board with controls is faulty.
If it does switch off completely (no light), and only comes back on after unplugging power cord for a while, then there is a different internal fault that is not starting protection circuit , but causing shutdown.
After double checking the PSU board, you will have to test a couple of ICs on main controller board, the deflection circuit and flyback transformer. Check also for broken solder joints and thaces of shorts on all boards and components (eg. burnt areas, blown capacitors), as a short can potentially cause sudden shut down.

Here schematics.

Here all parts for your TV.

Aug 26, 2009 | Projection Televisions

1 Answer

I was watching my kp61v80 and the screen went black-can you give me the trouble codes for the flashing standby light


Diagnosis item
TIMER/STANDBY
Indicater
Number of blinks
Supposed malfunction Condition
Self-diagnosis
screen display,
Diagnosis item: Results
•Power not ON 0
[Standby Power Supply System]
F601 open.
R607 open.
Q601 short circuit
[Main Power Supply System]
IC601 and R612 are broken.
VDR601 short-circuit
Cannot turn on the power.
LED doesn't blink.
+B OCP detection 2times Short circuit of power supply system in each circuit.
Goes to the standby mode
Short circuit of +B line
2 : +B OCP 000
+B OVP detection 3 times
T603 pin 78 open.
R672 open.
Goes to the standby mode
Malfunction of power supply circuit
3 : +B OVP 000
Vertical deflection stop 4 times
IC1509(V out) is broken.
Q1505(V Pulse Buffer) is broken.
Raster goes to one line horizontally, Aand then video
signal is muted.
4 : V Stop 000
Video out abnormality detection 5 times
Video out, Q705, 732, 761 and others in C board
circuit.
Q218, 219, 220 (A board)
TIMER/STANDBY LED blinks approx. 30 seconds,
and then blinks for the self diagnosis.
5 : AKB 000
Horizontal deflection stop 6 times
C515, 516 open.
IC206(YC Jungle) is broken.
Raster doesn't appear. 6 : H Stop 000
Audio abnormality detection 8 times
IC406(Audio amp.) is broken.
PS401, 402 open.
The sound is not out.
Goes to the standby mode
8 : Audio 000

Jun 17, 2009 | Projection Televisions

1 Answer

Broken remote circuit board


Very few people could pull off the repair you describe. For about twenty bucks you can purchase a new universal remote.

Apr 30, 2009 | Projection Televisions

1 Answer

NO POWER AT POWER SUPPLY BOARD EVEN AFTER REPLACING FUSE.


If the mains cord has only 2 pin plug, you can plug it the other way to see if the mains cord has an open circuit at one of the wires. It is not uncommon to find open circuited mains cord for a large appliance like a TV. The degaussing circuit causes a surge in current consumption when you switch on the TV from cold.

Mar 14, 2009 | RCA P52926 52" Rear Projection Television

1 Answer

Have no service manual--but suspect convergence output amps--now power issue


Its most likely the convergence ICs that are shutting the set down. Have you tried unplugging the convergence yokes to see if the set will then power up?

Jul 30, 2008 | Mitsubishi VS-50705 50" Rear Projection...

2 Answers

My television won't work.


The foil trace may have gotten broken on the printed circuit board behind the tct switch.. Try using the remote to turn on the TV set. If the set tryes to click on but does not, most likly the switch has nothing to do with this problem. If the relay cicks and nothing happens, most likly you have a fault in the main power supply and or the sweep supplys. These sets are very common to have bad capacitors and or the start up circuit to go bad. If your not experienced with electronic repairs, play it safe and call in a pro to assist you in this repair. Good Luck. Please do not forget to rate this thread.

Dec 12, 2006 | Mitsubishi VS-60603 60" Rear Projection...

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