View Single Post
Old 28th Apr 2021, 6:36 pm   #32
davidh1041
Pentode
 
davidh1041's Avatar
 
Join Date: Mar 2009
Location: Norwich, Norfolk, UK.
Posts: 181
Default Re: Philips 22cs1002

Hi folks. As this set only lives 25 miles away, I offered to have a look at it as it looked like an interesting fault. Anyway it arrived this morning and is now sorted. Annoyingly I have not got a K30 or a manual and worse still, I seem to have lost my 1981/1982 Newenes book.
The set turned out to be a lovely low usage set with a good CRT. I could not see any evidence of a repair, not even the 4.7ohm surge limiter had been replaced. Not bad for a 40 year old set. I remember seeing these when they first came out at a London trade show in one of the big hotels they used to use. We were Pye dealers back then so stocked the Pye version, which in my opinion was the better looking, set. Back in the day they were one of the best for reliability, just let down by short CRT life sadly.
First thing I did was remove the “IF” module, the line was still there so that had eliminated the “IF” and tuner. Next I scoped around the TDA3560 and the Sandcastle pulse, even though it was there and reasonable amplitude did not look right. This pulse is generated in the TDA2571AQ line osc. chip. Luckily I had a new one in stock and it cured the problem line.
So a happy ending for a very nice set.
Cheers David.
Attached Thumbnails
Click image for larger version

Name:	IMG_3355.jpg
Views:	64
Size:	71.9 KB
ID:	232863   Click image for larger version

Name:	YIFC2950.jpg
Views:	65
Size:	54.2 KB
ID:	232864   Click image for larger version

Name:	IMG_3359.jpg
Views:	72
Size:	69.3 KB
ID:	232865  
davidh1041 is offline