Static convergence

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.

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.

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.

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.