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Colour TV Brochures
Fabulous Finlandia; 1982 Granada C22XZ5
Tales of woe after the storms. (2007)
Live Aerial Mast
Total collapse
What Not To Do
1983 Philips 26CS3890/05R Teletext & Printer
MRG Systems ATP600 Databridge
Teletext Editing Terminal
Microvitec Monitor 1451MS4
BBC Microcomputer TELETEXT Project
Viewdata, Prestel, Philips
Philips Model Identification
1976/77 Rank Arena AC6333 – Worlds First Teletext Receiver
PYE 1980s Brochure
Ceefax (Teletext) Turns 50
Philips 1980s KT3 – K30 Range Brochure
Zanussi Television Brochure 1982
Ferguson Videostar Review
She soon put that down
1983 Sanyo Brochure
Wireless World Teletext Decoder
Unitra Brochure
Rediffusion CITAC (MK4A)
Thorn TRUMPS 2
Grundig Brochure 1984
The Obscure and missing Continental
G11 Television 1978 – 1980
Reditune
Hitachi VIP201P C.E.D Player
Thorn 3D01 – VHD VideoDisc Player
Granada Television Brochure, 1970s
Long Gone UK TV Shops
Memories of a Derwent Field Service Engineer
PYE Australia Circa 1971
Radios-TV VRAT
Fabulous Fablon
Thorn TX10 Chassis
Crusty-TV Museum, Analogue TV Network
Philips N1500 Warning!
Rumbelows
Thorn EMI Advertising
Thorn’s Guide to Servicing a VCR
Ferguson 3V24 De-Robed
Want to tell us a story?
Video Circuits V15 – Tripler Tester
Thorn Chassis Guide
Remove Teletext Lines & VCR Problems
Suggestions
Website Refresh
Colour TV Brochures
B&W TV Bush TV22 repair.
Last Friday this set was bought to the workshop for repair.
Yesterday, I set about finding what had caused the set to break down.
The mains fuse inside the set was found to be OC. To cut the story short the PZ30 HT rectifier and boost diode was the culprit. Fireworks display inside the valve. The faulty valve had taken out other components, a heater chain capacitor in the RF deck, a yellow capacitor fitted in 2014, now replaced by a polyester. See pic 1.
Switch on the set, only a tiny spark at the anode of the EY51 EHT rectifier.
Fearing the line output transformer was faulty I continued fault finding. Check the boost capacitor, dead short! After replacing the capacitor with a temporary component the results can be seen in pic 2, a badly focussed picture. EHT only 4,5KV.
Readjusting the line drive trimmer improved matters considerably, EHT 7KV and a bright picture with good focus.
Like all TV22s the interlace is not good. We learnt that was the result of too much integration in the frame sync filter circuit. a simple modification will improve interlace and reduce line pairing.
Till Eulenspiegel.
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