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Forum Free Registration Closed
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
Ceefax (Teletext)
Suggestions
Website Refresh
Colour TV Brochures
1970s Lounge Recreation
CrustyTV Vintage Television Museum
Linda Lovelace Experience
Humbars on a Sony KV2702
1972 Ultra 6713
D|E|R Service “The Best”
The one that got away
Technical information
The Line Output Stage
The map
Tales of a newly qualified young engineer.
Tales of a Radio Rentals Van Boy
Sanyo SMD
Disastrous Company Rebranding
1969 Philips G22K511
Memories Of The TV Trade
Crazy house
Dirty TV screens
Dual Standard and Single Standard CTV’s
Radios-TV on YouTube
The Winter of 62/63
A domestic audio installation
1979 Ferguson Videostar Deluxe 3V16
Music centre modifications
Unusual record player modification
B&K 467 Adapters
Mishaps In The Trade
1971 Beovision 3200
Service Data or Sams for Zenith chassis 9AAF10A
This chassis came out of a defunct Apricot Computer. It has the standard 10 way industrial keyway edge connector for supply and input. Through information on the internet I've managed to get a nice raster on the screen, and the CRT has good emissions. The line timebase is right on the correct speed at 15.63kHz (limitations of my multimeter's resolution), but the field timebase is running at about 32 hertz, much too slowly, so the set displays recognisable logos, text and the like but at random places on the screen. The chassis is dated September 1984. I'm pretty sure that this chassis is a standard chassis that can be configured to run either TTL or composite video. The entire chassis is discrete except for a single 8 pin IC that looks like an op-amp. I cannot find a vertical frequency pot anywhere. I know that Zenith provided good installation and service information for their products. It's a nice little chassis that someday I hope to convert into a retro digital television set that I can show you guys.
A service manual, SAMS or circuit diagram of the series of models would be useful.
Thanks
MongooseDC
Somebody has offered to build me a cabinet for this chassis if I succeed in getting it working. I've thought about several designs, but I might go for a miniature retro look. The old Bush TV12 series might be a good design to mimic, although it would be quite good to do a miniaturised version of a mid 50's 17 inch set. Another thought was to mount it in transparent perspex, de-boxing the digital converter, and showing off the CRT and all the innards in all its glory! But before that I need some circuit data. I'll post some photos of the chassis in time! Reminder - the model is 9AAF10A. Actually, as it stands the chassis actually looks like the vintage chassis found in old televisions in the day when the entire chassis - including the CRT - could be slid out of the cabinet - this is what has inspired the whole retro thing. If anyone has any suggestions regarding field rate, let me know.
Here is a picture of the chassis
If anyone can find the circuit diagram for this chassis let me know, as this is the first of 3 I'm going to restore and convert to digital.
Thanks, Mongoose DC
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