Question about Toshiba TP55F80/81 55" Rear Projection Television
The red vertical adjustment on my tv does not work..... I hear that there is an amplifier that needs replaced? Would I be able to get the service manual from you? I'm sure I can fix this myself, if I had a schematic of the circuitry. thank you...... I have a toshiba TP55C81 projection TV. The red The red vertical adjustments stopped working. The adjustmnet knob in the control panel does not effect the adjustment and none of the vertical adjustment on the board have an effect on the red. All other adjusments work even the red Horizontal.
You need to replace the vertical STK convergence chip but I would recommend that you replace the horizontal chip at the same time as this is likely to fail soon.
The following relates to the repair I have recently carried out to my Toshibal 40WH08B rear projection TV but shuold be very similar to your model. Replace the STK chips with the same type on your model:
On the convergence board PB 9487 (the one with the 2 large heat sinks that the r, b & g guns plug into) you will see two STK392-110 ics connected to the large heat sinks. Replace both of these and readjust convergence in service mode if necessary.
I obtained the replacement ics from Charles Hyde & Sons Ltd (see link below). I ordered the general ics not the Toshiba ones as these are identical as far as I could see and they cost £17.19 each instead of £36.68 each.
You will need to desolder the heat sinks as well as the ics as access to the ic mount screws are obstructed by the conv.dig board (metal cased). Buy a good quality desolder pump if you dont have one.
One last thing I should mention. The white paste between the ics and the heatsink is silicon thermal compound. Without this the heatsinks will not take heat from the ics effectivly and the ics will burn out! I recommend that you clean all of the old paste off the heatsinks and apply new to the whole of the metal plates on the back of the ics before you screw them to the heatsinks. You can get the thermal compound and the desolder pump from the same supplier I recommended for the ics.
Let know if your are having any problems.
Posted on May 30, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Look through your manual. Your manual will always give you the most specific directions for your particular model. Look for an "adjusting convergence" or "set manual convergence" section.
Feb 02, 2011 | Toshiba TN50V71 50" Rear Projection...
Nov 19, 2009 | Toshiba Televison & Video
Sep 21, 2009 | Toshiba TN61X81 61" Rear Projection...
Aug 28, 2009 | Sony KP-57WS500 57" Rear Projection...
Mar 24, 2009 | Sony KP-51WS520 51" Rear Projection...
Mar 23, 2009 | Toshiba 55H70 55" Rear Projection...
Jan 20, 2009 | Toshiba 55H70 55" Rear Projection...
Sep 16, 2008 | Mitsubishi WT-42313 42" Rear Projection...
Jul 25, 2008 | Televison & Video
Jan 10, 2008 | Toshiba TZ55V61 55" Rear Projection...
246 people viewed this question
Usually answered in minutes!