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Author Topic: WG 6100 repair logs  (Read 44888 times)

level42

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WG 6100 repair logs
« on: May 05, 2012, 02:22:26 PM »
Thread to document the repair of Atarimania's WG6100 and Belike's WG6100 deflection board.

Must say I have seen monitors in better physical condition....lots of rust on the frame, this baby had a tough life...

One thing I notice quickly: the yoke is loose around the neck ! No rubber wedges in sight !! This can never have a good convergence this way and I wonder where the rubber wedges went....

Apart from that I forgot what the problem actually was ..... :oops:

So decided to do the usual stuff. Visually check the solderings and redo them if suspect, check the caps, check all transistors and diodes....everything seems OK.

Next check the bottle caps on the frame.....ah we got a bad one. The one under the deflection PCB is showing a short between the case and one of the pins....when I remove it it is clear why it went bust: someone installed it without using any thermal grease. There was a mica insulator though.

Hopefully I can give it a test run later today...
« Last Edit: May 05, 2012, 04:29:10 PM by Level42 »
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Belike

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Re: WG 6100 repair logs
« Reply #1 on: May 05, 2012, 02:40:34 PM »
Wohoo, repair in progress. ;D :spaceace:
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atarimania

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Re: WG 6100 repair logs
« Reply #2 on: May 05, 2012, 03:22:11 PM »
Cool news...

I know a Tempest cabinet that is waiting for this screen  :wink:

Thanks
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level42

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Re: WG 6100 repair logs
« Reply #3 on: May 05, 2012, 04:31:52 PM »
I was lucky again, had the transistor in one of BR's kits. I normally never replace a transistor when they are still good, I don't see any reason to throw away perfectly working parts and transistors don't age.

Imstalled it with a new mica and some grease this time....checked for shorts to see if the legs don't touch the metal frame ( big risk with 6100s) and looks OK.

Time to test...
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level42

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Re: WG 6100 repair logs
« Reply #4 on: May 07, 2012, 11:57:01 AM »
Hooked it up to the SW this morning and here is the result:

http://youtu.be/kWnUzGQ1D5o

Definitely not perfect yet. I first will have to adjust the X and Y pots on the game PCB because naturally it is now set too wide (for the 25" amplifone) Apart from that it seems the red is pretty weak.

Will have to look into the neck pots and other adjustments. Of course the yoke still has to be fixed with some rubber wedges but it already looks better than I had expected with a "floating" yoke like this...
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level42

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Re: WG 6100 repair logs
« Reply #5 on: May 07, 2012, 09:45:34 PM »
Hmmmmmmmmmm, something just kicked me......apart from the two LEDs on the LV2000 (which should be on) I saw another LED on on the board.....it's the spot-killer LED SO the spot-killer is kicked in for some reason (without actually having a reason because deflection IS running fine. If this happens, you can _still_ get some picture by turning up the brightness completely.
I'm pretty sure that this is what is happening with this one.....

Will need to check the parts in the spot-killer circuit...
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level42

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Re: WG 6100 repair logs
« Reply #6 on: May 07, 2012, 11:35:44 PM »
Ok checked all the parts in the spot killer detection section....all seem fine.....

Even checked the parts on the neckboard, the only thing I'm not completely sure of I'd the Zenerdiode ZD500. Should I measure about half a volt in both directions on that ?

Any other reason for the spot killer to kick in while everything seems fine further ? Honestly I didn't measure the supply (or any other in fact )voltages yet.
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atarimania

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Re: WG 6100 repair logs
« Reply #7 on: May 08, 2012, 10:16:17 PM »
Honestly I don't understand a lot of things as I'm very bad in electronics  ;D but it becomes better  :)

Thanks
Franck
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Re: WG 6100 repair logs
« Reply #8 on: May 10, 2012, 12:33:07 PM »
Hooked up Béla's board yesterday. It gave a picture in the beginning but it looked very weird, all mashed...
The spot killer circuit also seemed to kick in intermittently. I also noticed the LEDs of the LV2000 going brighter and weaker....when I touched the board it seemed to jump to a bright LED on both sides.

Was the LV2000 already installed Béla ? The GND soldering in the middle is loose so I bet that is the cause for the poor functioning of that part. Also, for some reason, they kept the LV2000 a bit up from the main PCB, there is no reason for that, in fact the PCB will nicely support the LV2000 if you install it flush to the main PCB. Going to desolder the LV2000 and install it again an have another run.

After a couple of minutes of running the horizontal (x) deflection failed, so I only had a vertical line on the screen just like you described Béla. Obviously something is heating up and can't handle it...maye a bad solder joint maye a bad part....

With Franck's board I was less lucky this time. It now produced an image that I couldn't even get close to be focussed and everything seemed zoomed in. This normally is called blooming and is caused by a too low HV and/or B+ voltage.....sadly I didn't have that problem before....

I didn't examine the HV pcb yet but it worked OK before....

I really need to make a set up where I can work on it, being able to measure stuff around the board...will have to move the SW cockpit and put a table behind it to put the monitor on....not this weekend though, sorry guys, it's Rommelmarkt at the marching band clubhouse Friday evening and Saturday. See you there Robin ! ;)
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Belike

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Re: WG 6100 repair logs
« Reply #9 on: May 10, 2012, 01:45:29 PM »
Yeah, the LV 2000 was already installed when I received the cab.
I can imgaine the hassle you make every time when you hook up the pcb to the cab, many thanks for taking your time and energy for this. :spaceace:
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level42

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Re: WG 6100 repair logs
« Reply #10 on: May 10, 2012, 09:43:58 PM »
Quote from: Belike on May 10, 2012, 01:45:29 PM
Yeah, the LV 2000 was already installed when I received the cab.
I can imgaine the hassle you make every time when you hook up the pcb to the cab, many thanks for taking your time and energy for this. :spaceace:

No problem, didn't write that to give you guys a bad feeling but more as a kick in my own butt to get my workroom done (it will happen this summer!) and to release my frustration over it ;)

And....you already paid with a nice brick :P

Béla, do you have any idea _who_ installed that LV2000 ?? Because with all respect, but I think it's the worst solder job I've seen for a long time....

So much, that I fear for the LV2000 ! It looks the guy had a lot of problems installing it and tried to fix it in many ways. Even some tracks came loose from the LV2000 and apparently he tried to glue it back with some black stuff (pics later).

Anyway....it just happens so that I have a LV2000 light here at hands which is owned by Franck. I was stupid enough to order one for him because I thought it wasn't on there already, but there was one :S.

I will first try to get this one OK but if it's not working out it might be an option to buy Francks' although he did say he wanted it for his Space Duel....
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Re: WG 6100 repair logs
« Reply #11 on: May 10, 2012, 10:10:25 PM »
OMG, I just realized what has been happening with this LV2000.

The guy who installed it probably assumed that the three leads coming from the PCB were "left over" of forgotten to cut and HE CUT THEM before installing it !!

I guess what happened next was either the whole thing not working OR some parts blew as it looks like one of the voltage regulators has been replaced already....

To fix it some leads were soldered to the solderings where he cut them and the third (ground) was apparently very badly re-installed....

This has all to do with an art that is loosing ground quickly in this world: RTFM !!!!
You will not believe how many times in my work I have to deal with installers (and it's both younger and older one's) who simply install stuff without reading the manuals !!! We have specially made a booklet with all stuff we sell with clear drawing how everything should be installed which we include with every project. However nobody seems to check them. Instead of investing 5 minutes time to have a look and do it right the first time, they seem to prefer having to do it all again, taking hours and hours and hours......sigh....

O well...I think it's best to replace the two diodes. Those are the leads that go in the PCB... Impossible to make it work with extra solderingsbecause these will melt when soldering it into the PCB of course.....
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Belike

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Re: WG 6100 repair logs
« Reply #12 on: May 10, 2012, 11:02:12 PM »
Hmmm, I also had a feeling that something is wrong with that LV 2000 installation after reading the manual.
I received the cab like this, I guess Archer installed it or the previous owner. ???
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Re: WG 6100 repair logs
« Reply #13 on: May 14, 2012, 09:53:37 PM »
Well.....I really don't want to step on anyone's toes, and some people have great talents in certain things and others in other things but whoever it was....

Something dropped back in my mind when I watched the pics I shot (it's great to make macro shots...they reveal everything :)) AFAIR the LV2000's were sold as kits for some time. I think I now know the reason why they STOPPED selling them as kits.

I'm 99,9% sure that this was a kit.

This was the first thing I noticed about the LV2000. The GND pin in the middle is bent up and it is loose. If I press down the LV2000 the pin stays ! (It's right between the 4 resistors in the center):
http://gallery.me.com/andre.huijts/101108/DSCF0112/web.jpg?ver=13370233030001

Another weird thing: Why is this so high over the deflection PCB ?? I've installed 3 or so LV2000's and you can easily push them all the way down if you cleared the solder holes good enough. Nothing can short on this side....why is it so high then ?


Oh no....no-no-no...:


Sigh: http://youtu.be/r2eBlCpmq4M

Here....the goo failed: I can move the pin all the way....


But also: look at those solderings. Bulbs everywhere ! Too much solder used...this is the work of an amateur. Even my son solders better (it really isn't that hard if you have the right tools, temperature, and a little explanation).

I tried to remove the goo. Regretfully it _was_ strong enough to completely mess up the tracks:


I am close to calling this FUBAR....so.....Franck, do you still desperately want that LV2000 light or are you willing to sell it to Béla ? It may cost a bit, but I want your WG6100 to be reliable in the future too Béla.....

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Etienne MacGyver

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Re: WG 6100 repair logs
« Reply #14 on: May 14, 2012, 09:58:37 PM »
Are the components busted ?
if not, you can remove the bulbs of solder and repair some tracks with some solid wire ?
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