Hello all

 

My beloved MX4000 has finally gone 'on the blink' as we say here in the UK . Picture is reduced to a thin (5-8mm) vertical line in the centre of the screen. Audio is fine. Is this the end of a beautiful relationship? 

 

Thanks 

Mac 

I am not expert, but that sounds like a component failure rather than the tube. I wouldn't give up yet! Where are you based? Someone may be able to help.

Mac,

A very warm welcome to Beoworld..

Based on your "Problem Statement" it is clear there is lack of line driver to the horizontal scan coils, but the vertical drive is good.

Also, the fact you can see a vertical line means that the EHT (Extra High Tension) voltage from the LOPT (Line Output Transformer) to the tube anode is working fine.

The likely causes include:-

1. Short circuit secondary winding on the line Output transformer which drives the scan coils
2. The scan coils themselves (less likely)
3. Associated components connected to this section of the LOPT

In my view a good TV repair shop would have it fixed in no time, subject to availability of teh needed spare.

Keith/Peter

 

Thanks very much for your speedy and knowedgeable replies! I'm in SW London and the MX was bought from Ronald James of Coulsdon. I'm happy to go back there and enquire about them doing the repair unless you'd advise otherwise for whatever reason?

 

Thanks

Philip

Great forum by the way!

 

Philip,

I would certainly get them to at least give you a quote on the repair.

I would advise a PM to nobby (Neil) on this forum. He is in Farnham, Surrey and is our MX expert!

Hi,

Sounds like a fairly straightforward problem.

If you can drop it over to me, I will get it sorted for you.

If you drop me a note via the system or an email, I will let you have my contact details.

Regards, Neil
 

Thanks very much for all your help guys - very much appreciated! Nobby check your PMs.

 

Mac 

Just a quick post to pass on my gratitude to all posters who offered their assitance with this. Visited nobby this morning and he fixed the problem in a flash - even supplied a nice cup of tea, too! 

Thanks all - what a great forum & community.

Mac