You're welcome John. I'm glad it was something simple like a bad fuse. I have seen several instances of fuses failing just due to age where they either still look okay or just blow for no apparent reason. Whenever I rebuild monitors or regulator boards or power blocks, I just replace all of the fuses at once to avoid problems.
I had responded privately previously so nobody on vectorlist saw my comments and suggestions. Since it worked out okay, I've attached the conversation below.
William Boucher
http://www.biltronix.com
----- Original Message -----
From: John Huie
To: vectorlist@vectorlist.org
Sent: Saturday, August 27, 2011 12:35 PM
Subject: Re: VECTOR: K6100 deflection issue after full rebuild
Got it working. Bill was right and it was just that fuse. Thanks again Bill! The fuse was not "blown" though. It checked good when I pulled it out. But if I rotated it 180 degrees it would check bad. Then rotating it again it checked fine. Never had that happen before. I guess the filament inside must have just been loose.
It's working great now though!
----- Original Message -----
From: John Huie
To: William Boucher
Cc: vectorlist@vectorlist.org
Sent: Saturday, August 27, 2011 2:35 AM
Subject: Re: VECTOR: K6100 deflection issue after full rebuild
Thank you Bill. Interestingly, yes the spot-killer light is lit but I'm still seeing the vertical. And I can see movement. I'm including a link to a short video so you can see what I mean. The camera made it look much brighter than what it really is....don't worry, I'm not burning the screen. Anyway, as usual you have given me some great starting points and I really appreciate it! Here's what all was replaced as part of Bob Roberts kit:
R106, R701, R903, R901, R907, R910, R911, R926, C800, C803, C100-C103, D100-D103, C910, C909, C905, C914, C901, C902, ZD902, Q901, Q902
All 6 frame mounted transistors,
C503 on neck board
A few other components were replaced on the deflection board by the LV2000 but that was actually in place previously. The monitor was working before I did the kit but it had some issues with intermittent partial deflection for a while so I did this kit to try to fix it. Now I just get this. Oh yeah, here's the link to the video:
--- On Fri, 8/26/11, William Boucher <wboucher6@cogeco.ca> wrote:
From: William Boucher <wboucher6@cogeco.ca>
Subject: Re: VECTOR: K6100 deflection issue after full rebuild
To: jehuie@sbcglobal.net
Date: Friday, August 26, 2011, 8:15 PM
I have rebuilt quite a few wg6100 monitors for my collection as well as other people so I have a pretty good understanding of how they work. I have been thinking about your problem and I have been staring at the 6100 schematic for a while. I'm having difficulty seeing how you could be staring at a vertical line, that is unless you have the screen control cranked up more than normal. If there is no X deflection then the spot killer should be switched on (see LED). Is that the case? Is the LED on? If the LED is on, then the beam should be completely off and you should normally not see anything. If the screen control is turned way up, you'll see vectors, retrace lines, and a center spot regardless of the spot killer. Of course, without X, it'll just be a vertical line. Is that what you are getting?
Loss of X deflection can be caused by a problem anywhere in the X amplifier so it can take a while to narrow it down. Assuming that your monitor was working before you installed the cap kit and frame-mounted transistors, those components are obviously the first to revisit. A bit of white grease on the threads of the transistor screws will not hurt the collector connections, but if there's a lot of it on the other two pins (meaning also inside the center 2 socket contacts), that could cause a problem, however, the odds are that only one would be failing and so only half the screen would be absent, not both left & right halves. If you forgot to install the insulators of if they are shorting somehow anyway, it would blow the F100 and/or F101 fuses so your problem does not appear to be that.
Keep in mind that there's no deflection from center in either direction. One of the transistors (Q705) drives the beam away from center in one direction and the other one (Q706) drives it away from center in the other direction. It is unlikely that both of them are faulty (unless you swapped them with each other) so the problem is more likely something that is common to them both. For example, if the large power resistor (R710) is missing or open, no current can flow through the X yoke coil and you won't get deflection. Typically, if either Q703 or Q704 is bad (just one of them), you'll see deflection on half the screen and not the other half. However, if any of one of Q700, Q701, or Q702 is bad, then you'll get no deflection at all or the beam may get slammed so hard to one side that a fuse will blow. Speaking of which, fuse F700 being open will prevent X deflection entirely so check that one using a continuity meter because the break may be too small to see by eyeballing it. It is unlikely that you have a bad header pin solder joint on J700 because again, if there was just one bad connection, you'd still see half a screen working. Oh, and check the obvious like a bad X signal connection from the game board to the monitor. A bad terminal at the 3x5 main connector for the X signal will cause your problem, likewise the other end of the same lead at the game board.
One way to tell if your game board is messing up (other than try another monitor) is to briefly swap the X and Y signals at the input harness and see if the problem follows the wires or stays the same. If it stays the same, obviously it's not the game board.
Feel free to ask questions. Maybe if you can do some testing and verify a few things and let me know more about what it is doing (or not doing), then I can help diagnose it further.
Good luck,
William Boucher
http://www.biltronix.com
----- Original Message -----
From: John Huie
To: vectorlist@vectorlist.org
Sent: Friday, August 26, 2011 9:11 PM
Subject: VECTOR: K6100 deflection issue after full rebuild
I have a k6100 that was working but had some issues so I did the full deluxe Bob Roberts kit on the thing to shotgun it. Now there's no horizontal deflection at all but appears to work otherwise.
So....what is the most likely thing that I screwed up? One of the chassis mounted transistors? Perhaps I grounded one out somehow? One thing I did notice was that a couple of the screws had some heat-sink compound on them. Could it be that I didn't clean them well enough and one of them isn't making sufficient contact? Would that cause this?
What's the recommended way to track this down? Thanks guys!
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Received on Sat Aug 27 13:44:00 2011
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