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: Monitor weirdness...need help getting it working...  (Read 2374 times)

0 Members and 1 Guest are viewing this topic.

Poncho

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 2
  • Last login:February 23, 2003, 05:02:50 pm
  • I want my own arcade controls!
Monitor weirdness...need help getting it working...
« on: February 23, 2003, 06:09:06 pm »
Ok, here's what's happened so far and where I am right now.  Hopefully someone can help me get the monitor turned on.

I recently bought at an auction a Xenophobe cab that had been JAMMA-tized into a Silent Dragon.  When I got the cab home I replaced the main fuse, which was blown, and I turned the thing on. It blew again immediately, but in the split second before it did, I heard the high-pitched whine of a monitor turning on. After some poking around, I found that if i unplugged the flourescent light, the fuse would not blow, but the monitor wouldn't turn on either. After some more looking, I found that the flourescent light ground was shorted with one of the leads. After disconnecting the ground, I was able to have both plugged in, but still no monitor powering up.

The wiring in the cab was kind of strange, I thought. It had the power coming in, going through the filter, through the fuse, into the iso transformer, and then from there, it was taking two of the outputs, putting one to the light, and the other one was going to the monitor, but on the way to the monitor, it was being split so it could go to the switching power supply.

I rewired the cab according to this article by Bob Roberts
http://www.dameon.net/BBBB/buildit.html
minus the light (I'm just focusing on getting the monitor running right now) but the monitor is still not powering up.

I tested the leads going to the monitor, and it's getting about 127v. The monitor is a WG K7906. I was able to test the fuse on the monitor board and it is fine. The monitor is grounded.

So, I've never actually seen the monitor on, but I heard the monitor turn on, those times that the fuse was blowing, so I'm hoping that it is a working monitor.

If anybody has any idea about what's going on, please let me know. Any help is appreciated.

Thanks in advance!


delta88

  • I didn't try to trick anyone - Fair warning was given
  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 657
  • Last login:May 20, 2025, 08:21:05 am
  • This place is still here?
Re:Monitor weirdness...need help getting it working...
« Reply #1 on: February 26, 2003, 02:34:33 am »
from what I have done with monitors you should be able to take a plug aire it to a iso transformer and then wire that to the monitor and when you power it up you will see the neck start to glow and then the screen should turn white due to no there being no signal to the monitor from a pcb....now things to check for are to inspect the flyback  and the 2nd anode wire that comes off of that and goes to the top area of the tube.
I had a 25" that had a crack in the flyback and you could see  a small spark short from the top of the flyback to the side of the 2nd anode wire.. made a clicking noise like a broken sparkplug wire on a V8 ;)  but anyways when you power the monitor you should be able to see the neck tube glow.. check it out and get back with us

Poncho

  • Trade Count: (0)
  • Jr. Member
  • **
  • Offline Offline
  • Posts: 2
  • Last login:February 23, 2003, 05:02:50 pm
  • I want my own arcade controls!
Re:Monitor weirdness...need help getting it working...
« Reply #2 on: February 27, 2003, 12:52:37 am »
Hey, thanks for the new things to try, but still no luck.

I've got the monitor wired to the iso transformer and I flipped on the power, but the monitor didn't make a sound...no glow, no sparks from the flyback. It hasn't made any sounds since I disconnected it from the same circuit as the flourescent light. The front is just black. I checked again to make sure it was getting power and I'm reading 127v going to the monitor.  I don't know what else to try. If I can't figure this out, I'll probably just stick an extra computer monitor in there until I can get a replacement arcade monitor. Oh well... :-\