My MX3500 has a strange behaviour on power-up. Is it normal?

On all my previous (non B&O) TVs, the picture faded up, a few seconds after power-on. However, on my MX3500, about two seconds after power-on, I get an all grey raster, with vertical retrace lines visible. A second or so later, this fades away, to leave a good picture, with no retrace lines visible.

To me, this suggests that the set is feeding extra current somewhere on power-up (most likely grid G2, or cathodes) and then backing off to a normal level. Do these TVs do this to get faster start-up? If so, are the visible effects meant to be suppressed somehow, or is the behaviour normally visible?

Of course, it could be a faulty TV! 

Mark

p.s., If I've used the wrong forum please tell me - it was hard to decide between "Workbench" and "Vintage".

Hi Mark,

the Workbench is the right place :)

 This behaviour is a beginning fault, defect capacitors in the power supply and mainboard.

 Maybe next week there is a workshop power supply MX3500/5500.

 Martin

Thank you, Martin. I'll have to work out how to unwrap the boards from around the CRT! The MX2000 was easy, but the MX3500 seems to have everything crammed into too small a space. I don't understand what you mean by "Maybe next week there is a workshop power supply MX3500/5500", though. Has anyone made a list of electroytic capacitors inside an MX3500, so I can order then prior to dismantling? Thank you, Mark

Just have a look at the VX workshop

Probably next week i have an old MX5500 for repair here in my hobbyshop... i'll take some pictures and partlists.

Martin

Ah! Now I understand. Looking forward to it! Mark