Author Topic: Sony Trinitron CRT (early 80s) remote control comm. issue  (Read 2205 times)

0 Members and 1 Guest are viewing this topic.

Offline andy2000

  • Regular Contributor
  • *
  • Posts: 176
  • Country: us
Re: Sony Trinitron CRT (early 80s) remote control comm. issue
« Reply #25 on: July 28, 2018, 04:09:33 pm »
C023 is responsible for smoothing the half wave rectified DC from D012.  If it's bad, there will be lots of ripple on that supply which feeds the power relay, and standby 5v and 12v supplies.  The added load of the power relay may be enough to pull down this supply down too low to work.  I wouldn't waste any more time looking for other problems until you have a known good cap in there.  If you're ordering parts, I would get C025 and C026 too since they're also working 24/7 and could be contributing to the problem.
 
The following users thanked this post: CkRtech, tooki

Offline CkRtech

  • Regular Contributor
  • *
  • Posts: 63
  • Country: us
Re: Sony Trinitron CRT (early 80s) remote control comm. issue
« Reply #26 on: August 04, 2018, 12:39:51 am »
Thanks for the support, guys. Looks like that bad cap alone took down the voltage. Went ahead and replaced the other caps as recommended by andy2000 for good measure.  :-+

https://youtu.be/z-4zrzIlx28
 
The following users thanked this post: tooki


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf