Main Restorations Software Audio/Jukebox/MP3 Everything Else Buy/Sell/Trade
Project Announcements Monitor/Video GroovyMAME Merit/JVL Touchscreen Meet Up Retail Vendors
Driving & Racing Woodworking Software Support Forums Consoles Project Arcade Reviews
Automated Projects Artwork Frontend Support Forums Pinball Forum Discussion Old Boards
Raspberry Pi & Dev Board controls.dat Linux Miscellaneous Arcade Wiki Discussion Old Archives
Lightguns Arcade1Up Try the site in https mode Site News

Unread posts | New Replies | Recent posts | Rules | Chatroom | Wiki | File Repository | RSS | Submit news

  

Author Topic: Odds I could fix my TV?  (Read 1573 times)

0 Members and 1 Guest are viewing this topic.

RayB

  • I'm not wearing pants! HA!
  • Trade Count: (+4)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 11279
  • Last login:July 10, 2025, 01:33:58 am
  • There's my post
    • RayB.com
Odds I could fix my TV?
« on: February 11, 2009, 08:16:21 pm »
Seeing as how I'm just a "cap kit" guy (ie: can discharge a tube, understand the basics of the major parts of a monitor, can identify and replace visually damaged parts and install a capkit -- but not do much more, can't diagnose beyond visually eying burnt up parts  ;D) ... what are the odds I can fix a 7 year old crt TV?

The picture is very green. Skin tones are pinky salmon. No amount of adjusting the TV settings gets it anywhere near a good picture anymore. And there are faint 1" horizontal bars, mostly visible in dark areas of the image. Oh and when it's really cold, the tv makes snapping noises (cold solder joint along some high voltage part?)

I imagine a TV this "young" probably uses those tiny shrunken parts and there's no hope to fix this myself...

This is it: http://www.amazon.com/JVC-AV-27D304-27-TV-Silver/dp/tech-data/B00008VEK4/ref=de_a_smtd
« Last Edit: February 11, 2009, 08:28:54 pm by RayB »
NO MORE!!

qrz

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1056
  • Last login:October 24, 2015, 03:04:15 pm
  • wrangling electrons since 1978
Re: Odds I could fix my TV?
« Reply #1 on: February 12, 2009, 07:57:55 pm »
possibly a weak crt /circuitry issues.

print here :
http://www.eserviceinfo.com/downloadsm/12161/JVC_AV27D104,%20AV27D304%20AV27430,%20AV27432.html

check c527  10uF /250v
the processing ic has an automatic kine bias (akb) circuit to compensate for gun aging.
typically what occurs is the crt drops below the min level the akb can tolerate.

(sometimes turning up the screen grid for a few seconds,
then back to original position will " jolt " the akb setting  ) 

qrz

« Last Edit: February 15, 2009, 10:19:56 pm by qrz »

RayB

  • I'm not wearing pants! HA!
  • Trade Count: (+4)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 11279
  • Last login:July 10, 2025, 01:33:58 am
  • There's my post
    • RayB.com
Re: Odds I could fix my TV?
« Reply #2 on: February 13, 2009, 02:43:16 pm »
Thanks!
NO MORE!!

Ummon

  • Trade Count: (+13)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 5244
  • Last login:June 09, 2010, 06:37:18 pm
Re: Odds I could fix my TV?
« Reply #3 on: February 13, 2009, 09:37:10 pm »
Post what worked an all.
Yo. Chocolate.


"Theoretical physics has been the most successful and cost-effective in all of science."

Stephen Hawking


People often confuse expressed observations with complaint, ridicule, or - even worse - self-pity.