I don't know your set in detail, but I have some suggestions.

I would think it would be a good idea for you to invest in the service
manual. They should give instructions for the complete set-up of your set.
There will be test equipment necessary to do all of the set-ups to any great
detail. What you want to do, is mainly visually referenced, using a test
pattern on the screen.

In some models of sets, they use some resistors with jumpers that are
soldered to them to set the width. Some sets have a connector that is
selectable for the width. Another way of doing this, is that there may be a
pot or width coil on the main chassis in the horizontal output area.

--

JANA
_____


"Karyudo" wrote in message
...
I've got an RCA F27689, built in 2001. Not the world's best 27" TV,
but decent enough for me right now.

I'm a bit of a tweaker, so I've already found out how to get into the
service mode of my TV. I'm also a fairly cautious type, so I also
wrote down all the default values for my set before attempting to mess
with anything. I've also read some horror stories that suggest if
you're going to be fiddling with things in the service menu, you'd
best be prepared for the consequences of messing something up
permanently (or at least enough to require a visit to a service
technician). You may consider me a fool, but the potential benefits of
tweaking make that a risk I'm willing to take.

Using a Digital Video Essentials test pattern as a guide, I can see
that some parameters make visible changes: I've found vertical
position, vertical size, and horizontal position, for example.

However, the one thing I really want to change -- horizontal size, to
correct for what I feel is an awful lot of horizontal overscan -- has
thus far eluded me. I'm beginning to think maybe it can't be adjusted
at all (!), but I don't really want to believe that just yet. I'm
hoping maybe there's another password to set, and further parameters
to adjust. Or that one of the parameters I don't see doing anything
can be made to do something, somehow. I don't know -- I'm grasping at
theoretical straws here.

Could somebody with a little (or a lot) more experience than I've got
give me a couple of pointers? Thanks kindly...

[crossposted to sci.electronics.repair and rec.video]