SL-C7ub - UK Vintage Radio Repair and Restoration Discussion Forum

Electricdreams · 24th Apr 2013, 2:02 pm

I've just taken my SL-C7ub from the shelf which I've had for almost 16 years now.

A nice machine and was well looked after, it was bought for a pound in a auction by a old friend (lost touch now) and he gave it to me as a present. It was my main vcr for a few years.
When there was a jittering side to side fault I put it to one side and used a different vcr.

I've plugged it in and it still runs, the timer buttons are worn and the picture is jittery in playback and pause mode. Which explains the fault would be the drum servo control?

I've looked into my Video fault finding guide and there is no mention of this fault.

Has anyone got any ideas?

Paul

Nicklyons2 · 24th Apr 2013, 2:43 pm

I presume you've checked and cleaned the belts or better still replaced them. I've known motor bearings go on these; and then again the servos are suspect on many Sony Beta m/cs ALL small electrolytics in the servos should be replaced as a matter of course.

HamishBoxer · 24th Apr 2013, 3:58 pm

Those are the Tantalum Caps that give problems,possibly small and red.

Electricdreams · 24th Apr 2013, 8:51 pm

I'm sorry, forgive me,
Electrolytics and Tantalum Caps?

LXSTEIN45 · 24th Apr 2013, 9:04 pm

Tantalum are technically electrolytics and yes they could both be prone to failure (tants go low resistance and normal electros high) although I have no experience with this machine

Andy Doz · 25th Apr 2013, 6:30 am

Bottom board. The servo section is marked out. The caps are blue, made by Sanyo and look like traditional electrolytics, although quite small. They are tants. Change the lot.

McMurdo · 25th Apr 2013, 6:53 pm

worth mentioning the C7 jitters in pause anyway

24th Apr 2013, 2:02 pm	#1
Electricdreams Hexode Join Date: Mar 2008 Location: Manchester, UK. Posts: 478	SL-C7ub I've just taken my SL-C7ub from the shelf which I've had for almost 16 years now. A nice machine and was well looked after, it was bought for a pound in a auction by a old friend (lost touch now) and he gave it to me as a present. It was my main vcr for a few years. When there was a jittering side to side fault I put it to one side and used a different vcr. I've plugged it in and it still runs, the timer buttons are worn and the picture is jittery in playback and pause mode. Which explains the fault would be the drum servo control? I've looked into my Video fault finding guide and there is no mention of this fault. Has anyone got any ideas? Paul __________________ What have you bought now??

24th Apr 2013, 2:43 pm	#2
Nicklyons2 Octode Join Date: Jan 2013 Location: Barnsley, South Yorkshire, UK. Posts: 1,517	Re: SL-C7ub I presume you've checked and cleaned the belts or better still replaced them. I've known motor bearings go on these; and then again the servos are suspect on many Sony Beta m/cs ALL small electrolytics in the servos should be replaced as a matter of course.

24th Apr 2013, 3:58 pm	#3
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: SL-C7ub Those are the Tantalum Caps that give problems,possibly small and red. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

24th Apr 2013, 8:51 pm	#4
Electricdreams Hexode Join Date: Mar 2008 Location: Manchester, UK. Posts: 478	Re: SL-C7ub I'm sorry, forgive me, Electrolytics and Tantalum Caps? __________________ What have you bought now??

24th Apr 2013, 9:04 pm	#5
LXSTEIN45 Hexode Join Date: Dec 2009 Location: South Manchester, UK. Posts: 262	Re: SL-C7ub Tantalum are technically electrolytics and yes they could both be prone to failure (tants go low resistance and normal electros high) although I have no experience with this machine

25th Apr 2013, 6:30 am	#6
Andy Doz Hexode Join Date: Feb 2011 Location: Gloucestershire, UK. Posts: 376	Re: SL-C7ub Bottom board. The servo section is marked out. The caps are blue, made by Sanyo and look like traditional electrolytics, although quite small. They are tants. Change the lot.

25th Apr 2013, 6:53 pm	#7
McMurdo Dekatron Join Date: Jun 2009 Location: Staffordshire Moorlands, UK. Posts: 5,271	Re: SL-C7ub worth mentioning the C7 jitters in pause anyway __________________ Kevin