need help with SONY model

[Popester]

Hi everyone. I have purchased a Sony KV-8000 on ebay that worked until recently. I have lost luminance. I still have high voltage and have color, but I've lost something in the video channel. I'm wondering if a transistor stage quit or if I have a coupling cap gone bad. Anyway here is my question. There is an ebay listing of the Sony schematic on ebay that I'm pondering on purchasing, but it is listed as "Canadian Model". All the original Sony schematics I have always purchased said "US and Canadian Model". Would there be any difference in this manual compared to the US model? Both countries are NTSC and on 60Hz. I'm wondering if part numbers would be different for components between the 2 countries. Any ideas?? Popester

[Popester]

Ian, I forgot I had a photo of my epoxy repair. As you can see I may have been to generous with the amount I used. You can see the metal shield under the epoxy that tied to ground. If you look closely you can see a white color in the middle that would normally be red. This is where my crack in the HV block was. It was arcing directly to that shield. I don't use this set every day but do power it up a couple of times a month. I run it 4-6 hours without any issues.

[Popester]

Moderator delete post 8. I have it in the wrong thread.

[zeno]

IIRC early Sony models had different suffixes for where they we sold.
U= US, AU=Australia, CA=Canada etc. They also had the nasty habit
of putting a totally different chassis into the same model. So chassis
& serial numbers become important.
Dark picture is most likely low G-2 ( a.k.a. screen) voltage. Its a simple
voltage divider & control on the CRT socket IIRC. Usually a high ohm
resistor opened. If not that its most likely an open electrolytic coupling cap in the video chain
before the 3 color output transistors.

73 Zeno
LFOD !

BTW sorry for the IIRC's. I actually did hard time at Sony factory service in the late 70's but age has not been kind to my memory..........

Originally Posted by Popester

Hi everyone. I have purchased a Sony KV-8000 on ebay that worked until recently. I have lost luminance. I still have high voltage and have color, but I've lost something in the video channel. I'm wondering if a transistor stage quit or if I have a coupling cap gone bad. Anyway here is my question. There is an ebay listing of the Sony schematic on ebay that I'm pondering on purchasing, but it is listed as "Canadian Model". All the original Sony schematics I have always purchased said "US and Canadian Model". Would there be any difference in this manual compared to the US model? Both countries are NTSC and on 60Hz. I'm wondering if part numbers would be different for components between the 2 countries. Any ideas?? Popester