"Bruce Dow" wrote in message
...
There is no year indicated on this TV anywhere. It is a nice 32" with
Surround Sound.

The vertical linearity has become so poor now that it is no longer
watchable, but otherwise the TV is great.

There is a black band at the bottom of the screen and the bottom
half of the picture is all squished.

I read the user manual and there is no mention of the vertical linearity.
I took the back off of the set and there is no vertical linearity control
there, so I assume that it must be adjusted in
Service Mode.

I did a web search and found a couple of ways of entering Service Mode and
tried them, but they didn't work. (The one where you press Mute three
times then hold down Mute and press Menu? There is no Menu on this TV.)
(The one where you hold down 9 and press Channel Down? Didn't work.)
(There was another one: Hold down F and press Right Arrow
pointing into a Circle and enter 1046. Didn't work either.)

Please let me know if you know how to enter Service Mode on this set or
how the vertical linearity should be adjusted.

Thanks,

Bruce


The vertical linearity should not be adjusted - at this point in the game,
at least. There is a fault in the field output stage. This will almost
certainly be a defective electrolytic capacitor, particularly if the problem
has been getting progressively worse. Once this has been located and
replaced, there will probably be no need to carry out any adjustments.

If you don't have experience working on TVs, I would strongly recommend that
you take it to a reputable repair shop, as the power supply circuitry
employed in TV sets, is potentially LETHALLY DANGEROUS.

If you are OK with the safety angle, look for caps close to the field output
chip's heatsink. Replace them all if you don't have the necessary test gear
to check them properly.

Arfa