From - Sat Jul  6 02:04:14 1996
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From: jrr@flippers.com (John Robertson)
Newsgroups: rec.games.video.arcade.collecting
Subject: Re: TECH: Red Lost On Monitor
Message-ID: <722.31DE108B@flippers.com>
Date: Fri, 05 Jul 96 19:32:56 PDT
Organization: John's Jukes Tech BBS, Vancouver, BC, Canada
Lines: 38

To: All

Some of us don't see the light...

 p> From: power@premier.net
 p> Date: Fri, 05 Jul 1996 18:43:11 -0500

 p> I have a Wells Gardner Model 19K4914 (Original from Gauntlet I cab).
 p> Yesterday after putting a new cable on it, I powered it up.  Uh oh..
 p> No red.  Blue and Green are fine, just no red.  Replaced original
 p> cable, red still gone.  Monitor works perfectly otherwise.

This is a little technical, but if you can follow BE CAREFUL!
On the neck board of your monitor you will see three transistors with metal
tabs, each of these transistors is a colour, and if you connect MOMENTARILY
the tab to the metal frame of the chassis with a jumper wire you will be able
to see which colour it is. No mistaking the colour! Now if the screen lights
up with BLUE & GREEN when you short those tabs but the red is not present
or much dimmer then your picture tube has either a shorted gun OR the gun
has died completely. It is sometimes possible for a picture tube to be 
rejuvinated, but that's another story (check with your local TV repair
shops untill you find someone that knows how to do this). If you get RED, then
you have a problem in the monitor, usually the transistor on the neck board 
for the red gun has opened, replace it first, if you are cheap try the 
transistor from either the blue or green gun to see if that is it. IF you
still don't get a red picture after subbing the transistor and firing up
the game (minus the colour whose transistor you "borrowed"), then the
problem is on the mother board of the monitor, and a schematic would be 
usefull here.....
:-#)>
--  
jrr@flippers.com  <--- NEW E-Mail address, soon to be a nice little web page...
(jrr@jukes.wimsey.com   <---Old address, still good, not so fancy!)

John's Jukes Ltd. 2343 Main St.|  Voice (604)872-5757 FAX 872-2010   
Vancouver, BC, Canada V5T 3C9  |  (Pinballs, Jukes, Video Games)      
               ^^^^^^ 
    "Old pinballers never die, they just flip out."