Nordmende Spectra SK Deluxe Studio Colour Repair. - UK Vintage Radio Repair and Restoration Discussion Forum

em536716 · 28th May 2021, 3:00 pm

So I recently made winning bid on this massive, 4 screened Spectra Deluze Studio colour TV set.

I didn’t realise how heavy the thing is, as I carried it to and from the car!

Well anyway, it appears someone’s been in there before, part of a dropper resistor bodged with a modern power resistor, then bypassed all together with a link. Plugs floating around (I’ve connected 1 out of the 2 floating plugs...)

Power supply isn’t happy, not getting any of the correct volts on the power rails...

Question is where do I start? No schematics that’s I can find online for it, but there’s a similar type which is a table model without the extra screens I could use as a guide.

I’m in the process of firstly cleaning and inspecting the what I’m calling expansion boards. Covered in dust and dirt, and one of them has a battery which has leaked...

Here’s a few photos...

Welsh Anorak · 29th May 2021, 10:23 am

I admit to not knowing anything about these sets - apart from their weight!
However that dropper resistor looks completely out of place, so I'd start by trying to find out what the 'repairer' had in mind by fitting it. I hope it wasn't to boost the tube's (the main one!) heater voltage.
Good luck - you're a brave (and strong) man!

German Dalek · 31st May 2021, 6:27 am

Hi,
I have only the schematics for the SK-2 Chassis, the chassis in question.
But not for the 3 small sets and the technical brew how all this fid together.
I cannot scan it before mid June!
You can try RM-org, they might have it, too.
Or you ask here:
https://www.dampfradioforum.de/
or here:
https://www.wumpus-gollum-forum.de/forum/forum.php#c3

Good luck!
German Dalek

28th May 2021, 3:00 pm	#1
em536716 Hexode Join Date: Dec 2017 Location: South East London Posts: 301	Nordmende Spectra SK Deluxe Studio Colour Repair. So I recently made winning bid on this massive, 4 screened Spectra Deluze Studio colour TV set. I didn’t realise how heavy the thing is, as I carried it to and from the car! Well anyway, it appears someone’s been in there before, part of a dropper resistor bodged with a modern power resistor, then bypassed all together with a link. Plugs floating around (I’ve connected 1 out of the 2 floating plugs...) Power supply isn’t happy, not getting any of the correct volts on the power rails... Question is where do I start? No schematics that’s I can find online for it, but there’s a similar type which is a table model without the extra screens I could use as a guide. I’m in the process of firstly cleaning and inspecting the what I’m calling expansion boards. Covered in dust and dirt, and one of them has a battery which has leaked... Here’s a few photos... Attached Thumbnails __________________ With regards, Ed

29th May 2021, 10:23 am	#2
Welsh Anorak Dekatron Join Date: Apr 2005 Location: North Wales, UK. Posts: 6,927	Re: Nordmende Spectra SK Deluxe Studio Colour Repair. I admit to not knowing anything about these sets - apart from their weight! However that dropper resistor looks completely out of place, so I'd start by trying to find out what the 'repairer' had in mind by fitting it. I hope it wasn't to boost the tube's (the main one!) heater voltage. Good luck - you're a brave (and strong) man! __________________ Glyn www.gdelectronics.wales

31st May 2021, 6:27 am	#3
German Dalek Hexode Join Date: Jan 2011 Location: Düsseldorf, Germany. Posts: 368	Re: Nordmende Spectra SK Deluxe Studio Colour Repair. Hi, I have only the schematics for the SK-2 Chassis, the chassis in question. But not for the 3 small sets and the technical brew how all this fid together. I cannot scan it before mid June! You can try RM-org, they might have it, too. Or you ask here: https://www.dampfradioforum.de/ or here: https://www.wumpus-gollum-forum.de/forum/forum.php#c3 Good luck! German Dalek __________________ And now something completly different: MARC BOLAN, he was/is the real king of Pop Music!