UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Pye StudioCOLOUR (K35 chassis) No picture / sound

Sideband · 18th Jan 2022, 4:26 pm

I think the serial number indicates 15 week of 1984....KR00 415 981711.

Confusion over the number of chips in the decoder. Teletext sets had an additional switching chip fitted so the TDA 3560 was the decoder and the other chip (number escapes me) did the switching between text and TV. As far as I'm aware, the very early two-chip decoders (as fitted to early KT3 and K30MkI) didn't have teletext. It was a very long time ago so happy to be corrected (even though I repaired hundreds of these in various versions....)!

Note: You can't interchange decoders...two chip for one chip or vice versa!!

18th Jan 2022, 4:26 pm	#21
Sideband Dekatron Join Date: Oct 2003 Location: Croydon, Surrey, UK. Posts: 7,577	Re: Pye StudioCOLOUR (K35 chassis) No picture / sound I think the serial number indicates 15 week of 1984....KR00 415 981711. Confusion over the number of chips in the decoder. Teletext sets had an additional switching chip fitted so the TDA 3560 was the decoder and the other chip (number escapes me) did the switching between text and TV. As far as I'm aware, the very early two-chip decoders (as fitted to early KT3 and K30MkI) didn't have teletext. It was a very long time ago so happy to be corrected (even though I repaired hundreds of these in various versions....)! Note: You can't interchange decoders...two chip for one chip or vice versa!! __________________ There are lots of brilliant keyboard players and then there is Rick Wakeman.....