Static convergence

[[email protected]]

I'm trying to set the static convergence on a big screen TV, but can't
the blue to center vertically. The centering magnets only get the line
to within about a 1/4" of center (on right side). Any idea on what else
I can adjust or is this a possible faulty component? Thanks all.

 

[[email protected]]

Do you have the convergence circuit disabled per the service manual?
Is the blue suppose to be centered or offset by some specific amount?
Again check the service manual.

Some sets have the blue of center when the convergence circuit is
disabled.

 

[[email protected]]

The manual didn't specify this. Here's more info - the set has a
convergence adjust using the remote and cross pattern. I can line up
all 3 colors using the centering magnets and the remote. When I inject
a cross pattern using a signal generator (as the manual states) through
the coax, the blue will not line up. Of course I don't fully understand
the principles involved here since I'm new to repair. I hope this gives
a clue to the problem. Thankyou for the response.

 

[[email protected]]

Either the service manual, adjustment manual, or training manual will
specify how to disable the convergence circuit in order to do the
static convergence. It HAS to be done per the correct instructions.
You might need to call the manufacture tech support line to get the
correct information.

If it use to be good and suddenly is off, then there is a fault that
needs repaired.

 

[[email protected]]

Either the service manual, adjustment manual, or training manual will
specify how to disable the convergence circuit in order to do the
static convergence. It HAS to be done per the correct instructions.
You might need to call the manufacture tech support line to get the
correct information.

If it use to be good and suddenly is off, then there is a fault that
needs repaired.

I will take your advice and call Hitachi tomorrow. I did find something
new though, when using the built in convergence adjust with the remote,
the blue horizontal line will not move either direction. This isn't
normal and has to be part of the malfunction doesn't it? I'll repost
tomorrow. Thanks again.

 

[James Sweet]

I will take your advice and call Hitachi tomorrow. I did find something
new though, when using the built in convergence adjust with the remote,
the blue horizontal line will not move either direction. This isn't
normal and has to be part of the malfunction doesn't it? I'll repost
tomorrow. Thanks again.

Probably a bad solder connection on the convergence board or a bad STK IC on
that same board, you're trying to adjust out a fault and now you'll have to
do a full alignment once the fault is fixed rather than just a minor tweak
you'd have had to do before mucking with the static convergence.