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..........
Quote:
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  |