Sony Color

- V
- Vince
  
  Contact options for registered users
posted
17 years ago

Fri, Apr 27, 2007 6:52 PM

I have this Sony KV35V35 come to me with the power supply in bad shape, both of the 4834 transistors a condenser 2 resistors and the fuse resistor were gone and the HOTransistor.I replaced everything and tried the set, on variable transformer at 80 volts and everything went again. I ordered a power supply from PTS, replaced the HOTransistor, and tried it again on 80 volts, It came on and ran for about 15 minutes, and everything went again. any advice on this or should I trash the set? It is 10 years old. Thanks for any help I can get. Vince

- D
- David
  
  Contact options for registered users
Vote on answer
posted
17 years ago

Fri, Apr 27, 2007 7:19 PM

Did you solder the pins on the horizontal drive transformer? You must check all of the connections to the HOT base because poor connections there will blow it every time. Unfortunately, the power supply has no current limiting so the chopper transistors go as well. This is a well known failure mode in these sets.

David

- L
- Leonard Caillouet
  
  Contact options for registered users
Vote on answer
posted
16 years ago

Sat, Apr 28, 2007 2:01 AM

No reason to trash it if the CRT is still strong. This is a very routine repair for someone with experience with these sets. You do need to be aware of the various pitfalls of these repairs, however. There are quite a few. Start by listing exactly what parts were bad, what you replaced them with and where you got the parts, and maybe we can help if you provide some specific information.

Leonard