Author Topic: CM14 Issues  (Read 103 times)

0 Members and 1 Guest are viewing this topic.

Offline tjohnson

  • Supporter
  • 6128 Plus
  • *
  • Posts: 877
  • Country: gb
    • index.php?action=treasury
  • Liked: 263
  • Likes Given: 220
CM14 Issues
« on: 12:43, 30 September 20 »
Probably one for @Bryce .
I just pulled my CM14 out of storage (the garage) and when I switched it on the picture was trapizoidal, after a short while it when back to normal shape.  There has been a bit of distortion there after.  Probably not powered up for well over a year.
What do you think re-cap in order?
Cheers Trevor

Offline tjohnson

  • Supporter
  • 6128 Plus
  • *
  • Posts: 877
  • Country: gb
    • index.php?action=treasury
  • Liked: 263
  • Likes Given: 220
Re: CM14 Issues
« Reply #1 on: 12:52, 30 September 20 »
Oops spoke to soon.  Left it running, came down could smell distinct burning smell.  Picture had distorted (see attached). played with brightness and picture vanished and replaced with high pitch whine.
No picture displayed at all now.
« Last Edit: 13:07, 30 September 20 by tjohnson »

Offline Bryce

  • The Hardware Guy.
  • Supporter
  • 6128 Plus
  • *
  • Posts: 11.787
  • Country: wf
  • It's not broken, it just hasn't been fixed yet.
    • index.php?action=treasury
  • Liked: 4242
  • Likes Given: 446
Re: CM14 Issues
« Reply #2 on: 14:23, 30 September 20 »
Unfortunately, you possibly could have avoided this. If you bring in electronics from the garage, you should leave it for a day or two before turning it on. The damp / difference in temperature can cause condensation on the PCB. That together with old caps can cause other things to fail. In your case you have probably damaged the high voltage section.

Bryce.
 

Offline tjohnson

  • Supporter
  • 6128 Plus
  • *
  • Posts: 877
  • Country: gb
    • index.php?action=treasury
  • Liked: 263
  • Likes Given: 220
Re: CM14 Issues
« Reply #3 on: 14:28, 30 September 20 »
Yeah I did think that but my bad I decided I couldn't be bothered and maybe suffered the consequences as a result.  It's quite mild here, slight dampness could be more of an issue.
Might take the back off see if anything obviously burnt out, then probably just take to the dump.

Offline tjohnson

  • Supporter
  • 6128 Plus
  • *
  • Posts: 877
  • Country: gb
    • index.php?action=treasury
  • Liked: 263
  • Likes Given: 220
Re: CM14 Issues
« Reply #4 on: 14:56, 30 September 20 »
Yep noise certainly sounds like its coming from the HT section

https://youtu.be/Um3ZVOni_q0

https://youtu.be/kohekEyQR1s