John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum
October 31, 2024, 11:36:18 pm *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Welcome to the John's Arcade Forum. Glad you made it! Smiley
 
   Home   Help Search Calendar Login Register  
Pages: [1]
  Print  
Author Topic: monitor / screen growing problem  (Read 3216 times)
0 Members and 6 Guests are viewing this topic.
pimppride
Full Member
***
Offline Offline

Posts: 125



View Profile WWW
« on: April 01, 2014, 02:21:05 pm »

recently I noticed after a while of playing TRON, the screen starts to grow or enlarge ( with a wave or bend to it in the right side ) like if the horizontal and vertical control was readjusted during play... I assume its a heat or voltage issue Huh?

where should I start ? thanks

Anthony
Logged
pimppride
Full Member
***
Offline Offline

Posts: 125



View Profile WWW
« Reply #1 on: April 01, 2014, 02:25:32 pm »

also, researching, how do I tell what monitor I have in this...
Logged
John's Arcade
Administrator
Hero Member
*****
Offline Offline

Posts: 2097



View Profile
« Reply #2 on: April 01, 2014, 02:35:33 pm »

also, researching, how do I tell what monitor I have in this...

Check your B+ voltage.

Post a photo of the chassis.
Logged
pimppride
Full Member
***
Offline Offline

Posts: 125



View Profile WWW
« Reply #3 on: April 05, 2014, 12:09:22 am »

I hope these 2 photos help , where do I find the B voltage, I need to dig up the manual with schematic right...

http://db.tt/SakZSjhs

http://db.tt/tjk2dsWC
« Last Edit: April 05, 2014, 12:11:46 am by pimppride » Logged
jasonsmith
Full Member
***
Offline Offline

Posts: 216


View Profile
« Reply #4 on: April 06, 2014, 12:36:47 pm »

I don't know what monitor that is from the pic, guessing maybe a K4900?? It may not have a B+ adjustment. I know on the GO7 a wave is caused by bad connections at either the fuse block and or the edge connectors or grounds. Since yours does it after a certain amount of time I would agree that something may be starting to fail. When was the last time it had a cap kit? Maybe your monitor headers etc need to be reflowed.
Logged
Etienne MacGyver
Jr. Member
**
Offline Offline

Posts: 97



View Profile
Re:
« Reply #5 on: April 06, 2014, 01:46:11 pm »

I think caps
Logged
lojack
Newbie
*
Offline Offline

Posts: 39


View Profile
« Reply #6 on: April 07, 2014, 10:56:22 am »

look on the chassis or the back of the neck board.  sometimes is it there.  your pics didnt show any of that info.  with the chassis  you would be able to search for the right schematic to find out the test point for the b+ and for the correct cap kit if needed.
Logged

vids: MKI-IV, KI 1&2, Cocktail centipede, Street Fighter 2, Space Invaders Deluxe, Asteroids Deluxe, Tekken 4&5 and Soul Calibur 2
John's Arcade
Administrator
Hero Member
*****
Offline Offline

Posts: 2097



View Profile
« Reply #7 on: April 07, 2014, 11:03:43 am »

That looks like a 4900 to me.

Here's how to check the B+

http://newsgroups.derkeiler.com/Archive/Rec/rec.games.video.arcade.collecting/2007-08/msg01948.html
Logged
pimppride
Full Member
***
Offline Offline

Posts: 125



View Profile WWW
« Reply #8 on: April 07, 2014, 12:55:38 pm »

yea, for photos its a little awkward angle, the chassis or framework of the monitor has a metal triangle section in front of everything, I am going to try to get into it later this week and get some better photos and look for markings...

I found a few of johns arcade & others you tube videos on monitors over the weekend which cleared up allot of info for me, will see what the investigation finds...
Logged
pimppride
Full Member
***
Offline Offline

Posts: 125



View Profile WWW
« Reply #9 on: April 13, 2014, 06:56:34 pm »

from what I can tell watching youtube videos & poking around online its a WG 4900

here are some better photos, please correct me if I am wrong, I'm going to order a cap kit this week...

thanks everybody














Logged
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Install Simple Machines Forum Valid XHTML 1.0! Valid CSS!