Flickering VFD on VCR. - UK Vintage Radio Repair and Restoration Discussion Forum

Vauxfan2k · 15th Dec 2016, 5:41 pm

Hi guys,

Got a vcr with a flickering vfd. The brightness isn't so much of an issue and there doesn't appear to be any damage to the display unit. Wondering as these are cathode units if there is anything on the control board that I can check for/replace?

Here's a quick clip

https://youtu.be/28U-k-78clI

Thanks again

Steve

KeithsTV · 16th Dec 2016, 12:02 am

Faulty electrolytics? Had something similar with a VFD clock. Replaced one of the PSU electrolytics in the supply to the display which cured the problem and it's still going to this day.

Keith

Maarten · 16th Dec 2016, 10:39 pm

It depends a bit on the actual circuit. I would advise to look up the brand and type number of the VCR.

Vauxfan2k · 16th Dec 2016, 11:52 pm

Sanyo vhr-7260e

Not a common machine at all, shares some parts with the more modern fisher machines.

Sanbeta · 17th Dec 2016, 8:07 pm

As I remember it ,it was their first of a really slim design that also had the stop button double as the ON/OFF.
I had the next model up from this the VHR4350e I believe.
I would check the caps in the PSU area.
Normally if those VFD's are iffy they are just slightly dimmer not flickering.

.....Kevin

15th Dec 2016, 5:41 pm	#1
Vauxfan2k Hexode Join Date: Aug 2016 Location: Inverness, Highland, UK. Posts: 300	Flickering VFD on VCR. Hi guys, Got a vcr with a flickering vfd. The brightness isn't so much of an issue and there doesn't appear to be any damage to the display unit. Wondering as these are cathode units if there is anything on the control board that I can check for/replace? Here's a quick clip https://youtu.be/28U-k-78clI Thanks again Steve

16th Dec 2016, 12:02 am	#2
KeithsTV Nonode Join Date: Aug 2007 Location: South Bradford, West Yorkshire, UK. Posts: 2,573	Re: Flickering VFD on VCR. Faulty electrolytics? Had something similar with a VFD clock. Replaced one of the PSU electrolytics in the supply to the display which cured the problem and it's still going to this day. Keith

16th Dec 2016, 10:39 pm	#3
Maarten Dekatron Join Date: Dec 2007 Location: Haarlem, Netherlands Posts: 4,199	Re: Flickering VFD on VCR. It depends a bit on the actual circuit. I would advise to look up the brand and type number of the VCR.

16th Dec 2016, 11:52 pm	#4
Vauxfan2k Hexode Join Date: Aug 2016 Location: Inverness, Highland, UK. Posts: 300	Re: Flickering VFD on VCR. Sanyo vhr-7260e Not a common machine at all, shares some parts with the more modern fisher machines.

17th Dec 2016, 8:07 pm	#5
Sanbeta Hexode Join Date: Feb 2012 Location: Lowestoft, Suffolk, UK. Posts: 256	Re: Flickering VFD on VCR. As I remember it ,it was their first of a really slim design that also had the stop button double as the ON/OFF. I had the next model up from this the VHR4350e I believe. I would check the caps in the PSU area. Normally if those VFD's are iffy they are just slightly dimmer not flickering. .....Kevin