On Mon, 19 Sep 2005 20:39:57 GMT, "Albert Grennock"
wrote:


"Dave D" wrote in message
...

"Albert Grennock" wrote in message
...


Well obviously I would procede cautiously, if I didn't know what I was
doing
I would not do it.


So don't do it, because going off your contributions to this thread, you
clearly don't know anything about them.

I can't imagine it would be that difficult otherwise it would be
difficult
for
engineers/calibrators to work themselves.


They have the necessary *training*, Albert.

I don't need *training* because I have a degree in electronics,
it would be more usual for me to provide training to people
with less capabilities.

As an electronics repair person, I once repaired a set that belonged
to an electrical engineer, a man who insturcted me when I studied
electronics engineering technology years earlier. Just because you
know electronics does not mean that you can handle every problem.

Tom




Service menus are not for non-techies or consumers, they are there
specifically to facilitate adjustment by *trained* assembly opearators,
and
for engineers with the necessary skill/training/manuals.

You can render a TV completely unusable by altering service menu settings.
You can also make adjustments which can stress parts beyond their rated
tolerances.

How do you intend to use a service menu without any reference material?
Are
you just going to press buttons at random and hope the picture height
shrinks? How are you going to navigate through the menu without
instructions? Which buttons will you use? How will you decipher the coded
abbreviations for each setting? How will you know when you have set the
height up with the correct amount of overscan?

Furthermore, as has already been pointed out, the problem may be due to a
fault. What diagnostic steps will you take to confirm this? What
voltages/waveforms will you check? What will you compare them with? How
will
you test capacitors in the vertical output? Do you have an ESR meter? How
will you confirm the supply rail to the vertical output is the correct
voltage?

I have already explained all that, it would be obvious whether it would
be possible to amend the problem or not. If I fix it it's fixed, if I can't
I take it back, I have nothing to lose by trying and I might save a trip
back to the shop.


Give it up for heaven's sake, and take the damn thing back to the shop.

I'm am going to have to go back to the shop anyway because they have
charged me for a 3 year warrrenty which I didn't want (on the other TV
which actually works), another sharp practise by those criminals.
No doubt they will refuse to refund me that too, in which case that
little portable is going to be developing an aweful lot of weird and
wonderful
problems that only someone with a degree in electronics knows how
to induce :O). That £14 warrenty will end up costing them £10,000 :O)
B*stards.







Dave