Question about Toshiba 43H71 43" Rear Projection Television

1 Answer

More on signal board jumpers

Thanks for the quick response. So these are wires in parallel with the traces for better current carying? I see an inductor and 4.7k resistor in the +/-16v paths to the STKs, but no jumper wires near the STKs (actual board is back in the set right now). If this is something I need to add, what do the numbers you list mean? Where should thes jumpers be connected - are there specifics posted on another thread somewhere (I tried to search)? Thanks!!!

(By the way - I have just replaced my STK's, but F850 in 16v path continues to blow.)

Posted by on

  • hobbystuff Aug 24, 2008

    I used genuine Sanyo STKs.



    With the board out of the set again, I was able to identify the jumpers as described (thanks for your patience!). 010 did have a broken solder joint! I then replaced F850 and 852 on the power board and everything comes up - Yea!!!



    I went into the convergence service menu and re-aligned the grid. But at the end, I get "Touch Focus Error". Any thoughts? Picture looks fine. Thanks!

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,694 Answers

I will try my best to explain.....hard wires connect two circuit
traces together and are not in parallel with any component.They are used where a component is not needed.....however, the 16v
supplies must travel from the main board where the F850 &F851 fuses are to the signal board where the STK's are....after the two B+ volts pass thru the two PCB edge connectors,typically on an "H" line Toshiba en route to the STK current limiting resistors there are hard wire jumpers with NUMBER locations marked on the PCB.Just " Follow the path the voltages take" & solder all connects.......
Next thought = What brand / quality / price were your new,replacement IC's ?? = Toshiba,Sanyo or.....Chinese junk?
..........................T.

Posted on Aug 22, 2008

  • Vista Electronics Aug 24, 2008

    Touch Focus Error means convergence in servicer mode is not

    adjusted tight enough......if pix looks good to you I wouldn't worry about it........as-is will not harm set............. T.

×

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Volume not workin on tv


First things to do is check the volume controll if working or not.Then if good,check the wiring from the amplifier to the speaker,check also the speaker if good,if that parts is good,check the amplifier try to check the input signal of the amplifier if there's a hamming sound comming from the speaker,then if the amplifier is good,trace the signal sound of the amplifier from the board of your TV.Step by step process to find where is the problem coming from.Thanks!!!

Aug 21, 2011 | Hitachi Projection Televisions

1 Answer

Burnt spot on board


Depending on what caused the burn spot. It is possible to solder a bridge or jump wire from the point on the board that is not damaged and follow the trace or film connection to the next point that is to connect the two points. Other wise find a solder point on one side of the burn and if you can follow the path to the next solder point, use a jumper wire and solder each connection bridging over the burn. Wire has to be insulated. Some burn spots are caused by poor factory dipping of the board, and the solder loses connection over time from heat etc.

Jan 26, 2009 | RCA D61W20 61" Rear Projection Television

1 Answer

Mitsubishi 50603 no power.


Good Day;

DAVE; Sorry about your problem. .....The TV's board has been damaged by the fluid, causing the PC to have poor/open trace connections. These boards are double trace, circuits top and bottom, so, you have many 'feeds'. You might be able to find some one in your area to repair them. New boards from factory are not available. Some places, factory , will rebuild these boards, it's not an easy fix.
Good Luck, big IRISH.

Oct 06, 2008 | Mitsubishi VS-50603 50" Rear Projection...

1 Answer

Signal board jumper wires?


Hard wire jumpers feeding voltage to convergence circuitry located between board edge and current limiting resistors & near STK IC's.................HTH........................T.

Most H-line Toshiba's have them......

Aug 21, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Cicruit board for IC4511


I believe thats on the Signal board , but I dont have the schematics so I cant be sure, as all i have is the printout for the error codes for that model

Jul 19, 2008 | Panasonic PT-47WX53 47" Rear Projection...

2 Answers

The power led actually still comes on. Sorry for the misunderstanding. Thanks for all the help.


I just posted a response indicating that the stand up boards may need to be resaeted on the signal board if the audio still works casuse that can shut down the tubes

May 18, 2008 | Projection Televisions

1 Answer

Chasis number


this is same ctc169 check for separated power supply for convergence some times 2 wiress goin from main chassis to convergence board red and black are intermiten check for that but you mention that only show menu. select tv and check for tv signal or video imput if you dont have video you have convergence problem and some thing else

Apr 03, 2008 | RCA P52926 52" Rear Projection Television

1 Answer

Hi i have a 93


The jumper looks like a staple from the top side . It is soldered to the bottom of the board. The copper trace can be followed from pin 2 through the staple ( jumper ) to pin 6 of IC 2004. Remove the staple ( unsolder from the board ) then solder the staple from pin 6 to pin 7 of IC 2004. The IC has a notch at one end. Pin 1 is the first pin to the right of the notch looking down on it from the top. The pins are in consecutive order 1,2,3 etc. Hope this makes sense.

Mar 12, 2008 | Projection Televisions

1 Answer

Will not 'Touch Focus' - Toshiba 42H83


1)I have yet to learn any advantage to replacing -110's with -150's
I think there is a misconception that increasing numbers =
better,more durable results....Actually, using OEM or better
quality should be most important.Generics from any source
tend to be seconds,thirds, junk ! Name brand are first quality
2)Check B+ feed resistors next to convergence IC's = burnt ?

3)Solder wire jumpers on signal board = 008,010,017,600,etc.
prevent maitenance

Dec 20, 2007 | Projection Televisions

1 Answer

Toshiba 42h81 rptv


Pull chassis--check all fuses,esp, F850 & F851.They protect
the B+ supplied to convergence circuit.They are found in the power
supply,on edge of the main board.On the signal board,locate the
large IC's mounted to heatsinks.IC part #  STK392-110.Between the
edge of the signal board and the IC's---locate two grey jumper wires
and some hard wire jumpers = solder them all,if you don't,the fuse may blow again.Next,replace IC's with Hitachi up-grade part
# STK394-160E....Reassemble...power on.....touch magic focus
and you are done....T.     ?????s-----Let me know...

Oct 28, 2007 | Toshiba 42H81 42" Rear Projection...

Not finding what you are looking for?
Toshiba 43H71 43" Rear Projection Television Logo

50 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

Dave Naylor
Dave Naylor

Level 3 Expert

834 Answers

The Knight
The Knight

Level 3 Expert

68157 Answers

Are you a Toshiba Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...