Question about Toshiba 50H72 50" Rear Projection Television
I noticed on the left side of screen you can see double letters when writing is on that side of screen. Tried going to the menu and then convergence and it shows to access that function to press left or right arrow,I do that and nothing happens, I have left the tv on for about 45min prior to trying to converge it. Need to know if it is the ic or resistors and one more thing where is a good place to get a service manual for this tv, toshiba 50h72. Thanks in advance.
That is a TA0262 chassis and from what you're describing it could be a one of two things. A picture would speak volumes if you can send one...
If it's convergence you should be able to replace the amps, check and/or replace a couple of pico fuses and resistors and you're good to go. But from what you're explaining and what djnick was understanding the problem to be it sounds a bit like what techs call piecrusting - affecing only the outer edge(s) of the picture. If so, it's likely the hyper module Toshiba p/n# 23148024 and more specifically the grouping of caps on that module that have failed. More specifically 11 caps all 10mf/16v at the following pos#'s:
They're an smd cap and most of us simply replace them with miniatures and just clip the leads to fit.. Or you could just pull the board and send it ti a reputable shop and have it done, not an expensive job...
Either way if you have a pic it would be most helpful...
Posted on Feb 03, 2008
Protection mode means there is excessive current being drawn from some section of the tv. Power supply and deflection amps and convergence system are the biggest culprits but there are other causes, as well.
The foldover indication is a clear sign of a vertical deflection problem. The burn marks may mean there is a power supply meltdown caused by excessive current drawn. There could also be a horizontal meltdown going on. Temporarily lift the B+ line feeding the HOT/HV section and see if that prevents it from going into protection.
Check your soldering and other connections to make sure you did not execute a short when doing the work. If it did not go into protection before the vertical IC was changed it should not after - unless something was introduced that caused the excessive current.
Here are some general ideas that may help:
Posted on Feb 03, 2008
Tips for a great answer:
The List & Labels part of the setup lets you edit your channel list and choose or create a
personal six-character label for each channel.
Note: Changing List and Labels can be time consuming. You can change these at a later time by accessing the
1. Press the left or right arrow to scroll through the available channels and choose the
channel you want to edit.
2. Press the down arrow to highlight the In channel list option. Press the left or right arrow
button to add (the box is checked) or remove (the box is unchecked) the channel from the
3. Press the down arrow to highlight the Channel label option. Press the left or right arrow
button to scroll through the available list of 25 most common labels. The last option in
the list allows you to create your own six-character label for the channel (the first letter of
the label is highlighted).
4. Press the 1 or 2 number button to change the first letter of the label.
5. Press the right arrow to highlight the second letter, then press the 1 or 2 number button
to change the second letter, etc...
6. When you are finished creating your label, press OK. For model D34W20, your TV tunes to
the last channel available in your channel list. For models D40W20 and D52W20 only, the
Auto Convergence menu appears next.
Auto Convergence (for models D40W20 and D52W20 only)
Your TV's picture tubes might have been disturbed during delivery or after you moved the TV,
causing the color in your TV to be out of alignment. The colors adjust by starting auto
1. Press OK to begin auto convergence.
2. When the auto convergence is complete, the Red center convergence menu appears. The
cross in the middle of the screen should be yellow. If it is not, use the arrow buttons to
move the red cross to overlap the green cross. Press OK when adjustments are complete.
3. The Blue center convergence menu appears with a cyan cross in the middle of the screen. If
it is not, use the arrow buttons to move the blue cross to overlap the green cross. Press OK
(the TV tunes to the last available channel in the channel list).
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