Question about Toshiba 43H70 43" Rear Projection Television

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Have a TN43V71 which turns on with sound then

Have a Toshiba Theater version TN43V71 on a TAC9957 chassis. Set turns on with sound then screen and color shuts off after 10-20 min. and color won't return. Seems there are similar issues with many of the rear projection units but what is overheating? Is this a simple replacable PCboard(s) , a series of color related boards ,color wheel if applicable, Main pcb board(s)-or change power supply? This seems to be related to the blinking light issue. I removed/vacuumed static dust on most interior boards and cooling fin(s) re;general cleaning type thing.
Or does this relate to convergence chips?
Help, Thanks

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Posted on Jan 02, 2017

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Shuttle83
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SOURCE: Toshiba TN43V71 43 in rear projection

Hello WendyOreo,

 

It sounds like your switching power supply or you High Voltage power supply has malfunctioned. These sections control all power to the TV and can produce the situation you are describing. If you do not have a background in electronics, I would suggest that you have a TV repairperson come over and check your TV out.

 

I say this because there are voltages in a TV set that can kill, so caution is needed.

 

I hope this helps

Thank you,

Shuttle83

 

Posted on Oct 17, 2007

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  • 22 Answers

SOURCE: TN55X81 Rear Projection color separation - convergence problem

You shouldn't need to do a board replacement, all you should need to do is manually tune the convergence.

You can do this with the built-in user tool, but there's also a far more powerful set of options in the service mode. To save you the trouble (I advise doing a LOT of reading before attempting any of this) here's a solid set of various tutorials based on what form of "separation" you have occurring:

http://www.keohi.com/keohiHDTV/brandspecific/toshiba/servicemenu/servicemenu.html


Posted on Nov 21, 2007

  • 1 Answer

SOURCE: Toshiba model 61HX70 convergence issue

I'm having the same problem where the red if out of line and will not calibrate. Which board controls this? Thanks for any help

Posted on Jan 15, 2008

  • 30 Answers

SOURCE: Convergence issue, replaced convergence chips, now blinking red power light and no picture

Recheck all of your solder connections for bridging and cold solder joints. Check the large output resistors under the heat sink and the smaller ones to the left of them. Check all of the fuses on the power board. And make sure that you check all of your connectors carefully. Also check that you didn't pinch a wire somewhere.
I am not being mean by saying that if you could power up before then more than likely the power up issue was caused by something you did.

Posted on Mar 02, 2010

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1 Answer

NEED TOSHIBA TN43V71 CONVERGENCE CIRCUIT PART NUMBER


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

You can see some examples and find a fix here...

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Mar 04, 2010 | Toshiba TN43V71 43" Rear Projection...

1 Answer

Losses pitchure than will come back on after some time


First rule out the obivious ( Bad solder)
jigle the conectors in the back of the set
when its working , if nothing hapens

then grab both top right- left corner and
rock the a little fwd and backward .no change.

stamp on the floor near the set

it help if the set has a picture when you
try this so you can get feed back

if non of the activtes cause to picture to
change flicker , go on or off its
Probley a failing chip in the turner
or on the video board

hope this was helpful

Jul 02, 2009 | Toshiba TN43V71 43" Rear Projection...

1 Answer

No sound when playing dvd


HDMI may not output sound. Go into the setup screen of the DVD player and go into audio setup. Make sure you have it set for PCM or equivalent DIGITAL setting. If you set that and you still get no surround sound, you will have to use and optical cable between the receiver and the DVD.

Sep 06, 2008 | Audio Players & Recorders

1 Answer

Toshiba 42H81 problem set won't turn on


This repair is for technical skilled only.....
1) Pull chassis
2)Replace open fuse(s)
3)Replace Convergence IC"s
4)Solder specific bad connects
5)Reassemble,test

Please read my previous posts concerning convergence repairs.
Or provide Make,model,age and symptom.............T.

Jan 03, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba 43A61 - No Picture, no sound


If your set all of a sudden won't come on, e.g., the screen is blank, but the LED on the under the screen next to the on/off switch keeps flashing, then there may be an internal fault on the set that needs to be reset.
To force the reset, try this:
  • Unplug the set and wait a few seconds
  • Replug and see if the video returns
Whenever the set senses an internal fault through its monitoring circuitry, it essentially shuts down the set. The flashing LED provides the indication that a fault has been detected. Removing power to the set resets the monitoring circuitry. When plugged back in, the circuitry again does a check of the system. If it finds that there truly is a problem, then the set is shut down and the LED will again flash. In this case, you need to call a service tech. Most of the time, however, the unplug/replug routine is enough to get the set up and running.

Dec 11, 2007 | Toshiba 43A61 43" Rear Projection...

1 Answer

Hi toshiba 43 rp


You have a confusing mixture of data......Please provide
Make,model,age and chassis off sticker on back of set.....T.

Nov 26, 2007 | Toshiba 53H71 53 in. Rear Projection...

1 Answer

Toshiba TN43V71 43 in rear projection


Hello WendyOreo,

 

It sounds like your switching power supply or you High Voltage power supply has malfunctioned. These sections control all power to the TV and can produce the situation you are describing. If you do not have a background in electronics, I would suggest that you have a TV repairperson come over and check your TV out.

 

I say this because there are voltages in a TV set that can kill, so caution is needed.

 

I hope this helps

Thank you,

Shuttle83

 

Oct 17, 2007 | Toshiba TN43V71 43" Rear Projection...

2 Answers

P52151WK 52" projection TV, no video


Is the audio coming from the TV's internal speakers, or from an external sound system? In the 169 series chassis, if the power supply caps or secondary rectifier are bad, or if the high voltage splitter has shorted inside, the set will not run and there will be no picture or sound from the TV. If the picture is completely black but the TV still has audio, press the menu button and see if the menu comes up on the screen. If the menu is there, check your cables on the back of the TV. If you are using a cable or satellite box, the box could be bad or the video wire could be bad or loose. If you do not get the on-screen menu, then I would guess that the solder joint next to the flyback transformer that sends filament (heater) voltage up to the picture tubes has cracked, or the low value resistor in the heater circuit has opened up. If that is the case, have the set serviced by a qualified tech familiar with the 169 series chassis.

Aug 26, 2007 | Televison & Video

2 Answers

No sound on my toshiba television


just be basic....dvd is ouput goto tv input...watch the color yellow to yellow ,red to red etc, got tv ,look for audio output to anything input to home theatter etc.if u hook in to aux set home theater to aux etc, input to output and output to input ok? hope i help u..

May 08, 2007 | Toshiba CN32G90 TV

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