01-09-2020, 04:12 PM
I have just scanned the service manual for Prowest PM14/1A and PM19/1A professional dual standard video monitors and uploaded it to the archive: https://golbornevintageradio.co.uk/forum...p?tid=8059
My scan is from a photocopy I made many years ago, probably when I was working at Thorn-EMI CRL c1986. I don't have an original copy. I don't know why the photos have come out so small compared to the text. I did all the scans as 300dpi TIF. Then I cropped them, reduced to 2 bit monochrome and saved as GIF. Apart from the photos which I cropped and saved as JPG. I then used Irfanview to assemble all the pages into a PDF. I suspect this wasn't the ideal tool for the job but it was the most convenient. If anyone wants to have a go at doing a better job I can send the set of files.
These are probably the last 405 capable monitors ever manufactured. They also do 625 with automatic sensing of line standard. Fully soild state except that some versions had a valve EHT rectifier. Capable of giving superb quality pictures. They have separate EHT, fully stabilised.
Prowest also did lower quality 625 monitors, the 3 series and 5 series. The 3 series were actually very good, though the 11" version usually has a low emission CRT. I've rarely seen a 5 series. The PM22/7 was an early solid state colour monitor with 22" delta gun shadowmask CRT. Very nice pictures when they were working but reliability was poor (I'll admit they were quite old when I got some) and servicing a nightmare due to interlocks. I never got the knack of fixing them and if ever I see another one on the bench it will be too soon.
My scan is from a photocopy I made many years ago, probably when I was working at Thorn-EMI CRL c1986. I don't have an original copy. I don't know why the photos have come out so small compared to the text. I did all the scans as 300dpi TIF. Then I cropped them, reduced to 2 bit monochrome and saved as GIF. Apart from the photos which I cropped and saved as JPG. I then used Irfanview to assemble all the pages into a PDF. I suspect this wasn't the ideal tool for the job but it was the most convenient. If anyone wants to have a go at doing a better job I can send the set of files.
These are probably the last 405 capable monitors ever manufactured. They also do 625 with automatic sensing of line standard. Fully soild state except that some versions had a valve EHT rectifier. Capable of giving superb quality pictures. They have separate EHT, fully stabilised.
Prowest also did lower quality 625 monitors, the 3 series and 5 series. The 3 series were actually very good, though the 11" version usually has a low emission CRT. I've rarely seen a 5 series. The PM22/7 was an early solid state colour monitor with 22" delta gun shadowmask CRT. Very nice pictures when they were working but reliability was poor (I'll admit they were quite old when I got some) and servicing a nightmare due to interlocks. I never got the knack of fixing them and if ever I see another one on the bench it will be too soon.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv