UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Decca Bradford 2230

Hybrid tellies · 16th Sep 2006, 9:42 pm

Hi Neil
Glad you got the set going. I cannot add much to what has already been said. As has been mentioned you need to check the cathode and A1 voltages on the CRT base, other things to check are those video drive presets located just underneath the RGB output transistors on the decoder board, which use to cause lots of problems then of course the MC1327 IC.
Mick's advice on swapping the output leads to check the other guns is highly recommended and a quick way of localising RGB output faults and checking the state of the tube.
As I live just down the M4 there is a possibility I could come and take a look if you get stuck.

16th Sep 2006, 9:42 pm	#9
Hybrid tellies Nonode Join Date: Jan 2004 Location: 1966-1976 Coverack in Cornwall and Helston Cornwall. 1976-present Bristol/Bath area. Posts: 2,965	Re: decca bradford Hi Neil Glad you got the set going. I cannot add much to what has already been said. As has been mentioned you need to check the cathode and A1 voltages on the CRT base, other things to check are those video drive presets located just underneath the RGB output transistors on the decoder board, which use to cause lots of problems then of course the MC1327 IC. Mick's advice on swapping the output leads to check the other guns is highly recommended and a quick way of localising RGB output faults and checking the state of the tube. As I live just down the M4 there is a possibility I could come and take a look if you get stuck. __________________ Simon BVWS member