Question about Toshiba 55H70 55" Rear Projection Television

3 Answers

Theory of Operation for 55H70?

I have the manuals for this Toshiba (TAC0069) but -as I recall from my days as a Toshiba Authorized -- Toshiba sometimes provided a Theory of Operation manual for a chassis series. Is there such a manual for this? Specifically, I want to understand the process of determining the sync rates of the incoming signal. How the circuit responds, switching the horiz and vertical rates.

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  • Paula Something Jul 18, 2007

    Somehow my original message landed in the 55h_X_70 section: Subject 'Won't lock on standard resolution'

    Per your suggestion, I am awaiting a new eeprom muttering "It can't be that simple."

    Which means, of course, yes it can. Thanks. I'll report back.

  • Paula Something Jul 23, 2007

    Replacing QA02 did not solve the problem but does allow the set to stay on long enough to attach some pix.

    The story so far: STK392-110's replaced to fix original problem. While doing convergence I hit some unfortunate buttons and the 480i pic went bonkers.

    1080i *with input signal* is rock solid.
    480i or [1080i with no input signal] looks like this.

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Needs new stk 392-110

Posted on Oct 07, 2007

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I read somewhere that there are eeprom values that if scrambled or lost can drastically affect the picture. I believe they are accessable and alterable through the service menus. I ran across a website somewhere (sorry) that had some values from other peoples sets. The values are custom per set -

Posted on Oct 06, 2007

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You must realign each mode 1080/ 480

Posted on Sep 08, 2007

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1 Answer

How do you the ballast


How do you know it is bad? i do not EVER recall a bad ballast on a Toshiba. Likely the generic lamp you used will NOT fire--Toshiba sets are VERY particular about lamps. that--or a bad color wheel.

Mar 24, 2014 | Toshiba 55H70 55" Rear Projection...

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Toshiba 55H70 Service Manual Download


Download Toshiba 55H70 Projection Television Service Manual

Models: 50HX70 / 55HX70 / 61HX70 / 55H70 / 61H70

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Have you misplaced your Toshiba 55H70 Projection Television Service Manual?

Would you like a digital, searchable, pdf version of the Toshiba 55H70 Projection Television Service Guide?

Follow this link
(& click FREE) to download a pdf version of the Toshiba 55H70 Projection Television troubleshooting & repair instructions.

I hope that helps.
_______________________________________________
Toshiba 55H70 Manual Download

on May 10, 2010 | Televison & Video

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Toshiba 55H70 Manual Download


Download Toshiba 55H70 Projection Television Manual

Models: 50HX70 / 55HX70 / 61HX70 / 55H70 / 61H70

8035beb.jpeg



Have you misplaced your Toshiba 55H70 Projection Television Owners Manual?

Would you like a digital, searchable, pdf version of the Toshiba 55H70 Projection Television User Guide?

Follow this link (& click FREE) to download a pdf version of the Toshiba 55H70 Projection Television instructions.

I hope that helps.
_______________________________________________
Toshiba 55H70 Service Manual Download

on May 10, 2010 | Televison & Video

1 Answer

My tv keeps shutting off. it works fine for a couple of days and at times it only goes back on when i keep plugging it into the power outlet.


Toshiba 55H70 55" Take the back off and pull the HV power board and check all the solder joints, seem to me that you has a cold solder joint. check it out be carefull with high voltages.

Jan 27, 2011 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55h70 schematics


you can get the entire service manual emailed to you from the following link.
http://servicemanuals.vstore.ca/

Jun 08, 2008 | Toshiba 55H70 55" Rear Projection...

Tip

Toshiba 55H70 Service Manual Download


Download Toshiba 55H70 Projection Television Service Manual

Models: 50HX70 / 55HX70 / 61HX70 / 55H70 / 61H70

8035beb.jpeg



Have you misplaced your Toshiba 55H70 Projection Television Service Manual?

Would you like a digital, searchable, pdf version of the Toshiba 55H70 Projection Television Service Guide?

Follow this link
(& click FREE) to download a pdf version of the Toshiba 55H70 Projection Television troubleshooting & repair instructions.

I hope that helps.
_______________________________________________
Toshiba 55H70 Manual Download

on May 10, 2010 | Toshiba 55H70 55" Rear Projection...

Tip

Toshiba 55H70 Manual Download


Download Toshiba 55H70 Projection Television Manual

Models: 50HX70 / 55HX70 / 61HX70 / 55H70 / 61H70

8035beb.jpeg



Have you misplaced your Toshiba 55H70 Projection Television Owners Manual?

Would you like a digital, searchable, pdf version of the Toshiba 55H70 Projection Television User Guide?

Follow this link (& click FREE) to download a pdf version of the Toshiba 55H70 Projection Television instructions.

I hope that helps.
_______________________________________________
Toshiba 55H70 Service Manual Download

on May 10, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

Channel stuck on toshiba 55x71 (55h70)


enter your menu settings auto porgram your chaannels/i assume you have normal cable.

Jan 07, 2007 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55H70 Green CRT


Whgat you should have done was to take off the red tube socket and put that socket on the rear of the red tube onto the green tube. If the green worked then you know the green tube was good and the driver was bad. If a set is over 6 to 10 years old, and if you replace one tube, It will never get a good grey scale(B&W). I hope you didnt replace the tube when a driver was bad!

Sep 06, 2006 | Toshiba 55H70 55" Rear Projection...

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