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

Chris55000 · 14th Jan 2019, 1:43 am

Hi!

I thought I'd ask this one as I've two cheapie camcorder projects as my summer holiday projects!

Steve Beeching wrote an article on fault–finding CCD imagers, using the circuitry around the uPD3525C Imager used in the JRC7 as an example, (article on ARH, "Television" 1990 but I can't remember the exact issue) – I do remember Steve quoting "a green stripe down the left hand side of the display indicates failure", can any Member explain why, and what other manifestations of imager failure are there?

Is it still possible to obtain and fit replacement imagers, or is it far better to look for a "parts mule" and replace the whole imager PCB assembly?

I'd be interested on other Member's experiences with imager devices!

Chris Williams

PS!

Do CMOS Imagers show the same sorts of failure symptoms as the original CCD types?

14th Jan 2019, 1:43 am	#1
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	Camcorder Imager Failures? Hi! I thought I'd ask this one as I've two cheapie camcorder projects as my summer holiday projects! Steve Beeching wrote an article on fault–finding CCD imagers, using the circuitry around the uPD3525C Imager used in the JRC7 as an example, (article on ARH, "Television" 1990 but I can't remember the exact issue) – I do remember Steve quoting "a green stripe down the left hand side of the display indicates failure", can any Member explain why, and what other manifestations of imager failure are there? Is it still possible to obtain and fit replacement imagers, or is it far better to look for a "parts mule" and replace the whole imager PCB assembly? I'd be interested on other Member's experiences with imager devices! Chris Williams PS! Do CMOS Imagers show the same sorts of failure symptoms as the original CCD types? __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!