Question about Toshiba 43H71 43" Rear Projection Television

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Signal board jumper wires?

Can you clarify what you mean by soldering jumper wires 008, 010, etc? I can't find a reference to these anywhere.

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  • hobbystuff Aug 21, 2008

    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!!!

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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......

Posted on Aug 21, 2008

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Tv tuns on but has a blank screen it has sound and i can scroll through the menu screen on the tv the same through all the input channels


Hmmmm, just happen to have the same problem. Since Mitsubishi has pulled tech support, there is not an available fix for this. But don't give up. You will need to pull out the power supply board (located on right side in rear). Resolder your vertical IC (LA78XX series). Do not short the pins with excess solder. Resolder the horizontal transformer, resolder the flyback transformer. Resolder jumper sockets CE,RG,DM,VU,DP, and EL. These are the connections between the two boards (signal board on left and power supply on right). Inspect the board very carefully and find any and all bad solders on this board, you must really look for these. Next pull the signal board out. Resolder jumper connections CE,RG,DM,VU,DP, and EL (these connect to power supply). Resolder the convergence IC800,do not short the pins with excess solder (STK 393 110). Replace capacitors C8c05, C8c07,C2c867,C2V17 and C601. Resolder the rest of this signal board. Other connections to resolder include behind the tuners TU1A02 (says RF), resolder jumper sockets KC,KB,AV1,AV2, resolder IC2p30. Please inspect the rest of the board and I mean you will have to take time to do this. Do not expect to repair this in one day. From removing the cover and reinstalling the boards will take time. I recommend you spend about an hour a day if you can. It may be two weeks, being patient and being very careful will produce good results. When you are finished, you will discover you still have a problem. But, in time this will improve. For some reason, this TV, will think it still has a problem...it will improve! You have to reset its memory. This comes with using your TV. Thanks for asking and show all hands of support!

Jun 01, 2011 | Mitsubishi VS-70707 70" Rear Projection...

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

More on signal board jumpers


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.

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

1 Answer

Toshiba 50HX81 Power LED Flashing


Check any/all soldered-in micro fuses....F850,F851 etc.
Re-check your work......
solder jumper wires on signal board or fuse (s) may blow......T.

Apr 20, 2008 | Toshiba 65HX81 65" Rear Projection...

1 Answer

Convergence...again


Please read my solutions for Tosh "H" line convergence issues.
Check fuses F850,F851,etc.......use STK394-160E upgrade
IC's.....save $.....Use Hitachi kit # X 480293.............Also,
solder wire jumpers on signal board........................T.

Apr 16, 2008 | Toshiba 50H82 50" Rear Projection...

1 Answer

Problem with tv


If your Model is Tosh 43H71,then pull chassis and locate F850,
F851 soldered-in fuses...check with meter..if open,replace with
proper value micro fuse(s) and solder jumper wires 008,010,017,
048,600 located on signal board.Replace convergence IC's
STK392-110 with IC's from kit # X 480295 ( upgrade )...........T.

Mar 31, 2008 | Toshiba 43H71 43" Rear Projection...

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

Convergence fuse Toshiba rear projection tv


Wire jumpers need re-soldering....Locations 008,010,017 etc
on inside edge of signal board near convergence IC's.....research
my Toshiba " H " Model rear projection " blows fuses" solutions.
...................................T.

Jan 27, 2008 | Toshiba 55H70 55" Rear Projection...

2 Answers

Power indicator light blinking


Check soldered in micro fuses...F850, F851 etc.....
1) solder jumper wires on signal board = 008,010,017,048,600
2) Check / replace STK392-110 convergence IC's with Toshiba
part # 23135090 or upgade to Hitachi part # CZ01341
Let me know....................T.

Jan 04, 2008 | Toshiba 65HX81 65" Rear Projection...

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...

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