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

Heatercathodeshort · 12th Sep 2006, 9:06 am

Hello Dom,
The Decca Bradford chassis was one of the best colour TV chassis of its period.
Like Hybrid, I also repaired huge numbers of these sets and never experienced a tricky fault. My guess is that you are lacking the CRT first anode potentials probably due to a short circuit decoupling capacitor or feed resistor. The blue and white Dubilier caps were prone to this.

Common 'stock' faults are as follows, Mains switch, mains filter capacitor, the large 3.9ohm surge limiter resistor, boost capacitor, height, frame lin presets, the line 'boost' preset [replace with fixed resistors] the resistors feeding the height control from the boost line, the EHT tripler and the odd LOPT.
Pictures show my own 2230. Hope you get it sorted.
Regards John.

12th Sep 2006, 9:06 am	#6
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Decca Bradford NEED help PLZ!! Hello Dom, The Decca Bradford chassis was one of the best colour TV chassis of its period. Like Hybrid, I also repaired huge numbers of these sets and never experienced a tricky fault. My guess is that you are lacking the CRT first anode potentials probably due to a short circuit decoupling capacitor or feed resistor. The blue and white Dubilier caps were prone to this. Common 'stock' faults are as follows, Mains switch, mains filter capacitor, the large 3.9ohm surge limiter resistor, boost capacitor, height, frame lin presets, the line 'boost' preset [replace with fixed resistors] the resistors feeding the height control from the boost line, the EHT tripler and the odd LOPT. Pictures show my own 2230. Hope you get it sorted. Regards John. Attached Thumbnails