WG-U2000 hell!

[rusolinio]

Hi guys,

  Ive just sourced an empty ki2 cab in decent order with a wg-u2000 yet im having a few issues. firstly, when i plug in my umk3 board into the cab i get a 'mirrored' image, with everything on screen completely reversed.

Secondly, i no longer have 'green' as a colour. can i fix this myself cost effectively? Ive read the manual for the u2000 and the troubleshooter pointed me to these components for the 'no green' issue:

Q510, R562, R563, Q504, Q507, IC U500.

Where can i source these components?

any help on these issues would be greatly appreciated. losing hair rapidly.......

[grantspain]

wish i had faults like this
to sort the mirror image you need to reverse each of the yoke plugs(cn206 and cn207),for instance the horizontal deflection plug(cn206) should have a 2 way plug with a red and blue wire attached-all you do is pull the plug off and put back on so that the blue is the place of where the red was and do the same with the vertical deflection plug(cn206)
make sure you switch off the power to the machine before doing this

the green missing is probably a bad solder joint on or around Q504 or perhaps Q504 is faulty,check the traces and solder joints and if all seems o.k then compare meter reading of the the transistors or swap Q504 with Q503

[rusolinio]

Many thanks for your help m8. most appreciated!

Ive located the h+v yoke plugs, but will i have to discharge the monitor before sticking my hand in there? (power off of course)

I can do this, but the anode cap is in a nightmare location. Some nice soul kindly nailed the monitor hatch shut with what appears to be every nail ever created by man, and i can only access the monitor from underneath.

I know ill have to get the monitor out eventually in order to look more closely at the Q504, but at least i know where to start. Cheers.

I also have a 6in1 jamma connector that i wish to use. I know ki2 works correctly with the yoke plugs in their original position, but if i change them around to work with umk3 i'd then have to swap them back again when i switch back to  a game like ki2, right? If so it would be a total ball-ache im sure you'll agree....

So, can i use another monitor of similar size (i'd like to use a hantarex polo if poss as i can source these cheaply) that doesnt need the h+v yoke plugs to be swapped about for when i switch between games? IS there such a monitor out there?

[grantspain]

is the picture mirrored or upside down?

[rusolinio]

its mirrored.

[grantspain]

now this is really strange,is it only one board mirror imaged?
if so which game?

[rusolinio]

its umk3 thats mirrored. ive just moved home, and cant access my other boards right now. All i have is umk3 to hand.

I also have no sound with umk3, but im yet to test things on the sound side.

[grantspain]

hmmmm,never worked on this game
there is no option in test whereby this game can be used in a mirror/projector cab is there?

[rusolinio]

If there is, i cant find it. ive been through the whole test menu and cant find an option to change it. I'll have another look tomorrow.

regarding the Q504, any idea what resistance values am i looking for?

i'm assuming that the red is Q503, green Q504, and blue Q505? I ask because i cant tell from the wiring diagram and my limited view from the back of my cab.

Anyway, i just tested them. results:

Red Q503 =1.00
grn Q504  =1.01
blu Q505  = 0.93

[SirPeale]

You don't test transistors with resistance, you test them with diode test.

[rusolinio]

ah ok. can you tell my noobidity?

[grantspain]

yep i use a diode test and just go base to emitter,collector to base etc etc comparing the readings from transistor to transistor

swapping colour inputs is another option to prove where the fault lies

if your monitor is difficult to access then i would suggest removing it from the cab,being mindful of the power/video input/earth and remote cables

[rusolinio]

just completed the diode test. i Did get varying results on the red Q505, but not the green or the blue. they were identical. Had enough for tonight, i'll get back on it tomorrow with a clear head. Cheers for the guidance.

[rusolinio]

well, finished playing now. Outcome? I now have a fully working U2000. How? Pffft, i couldnt tell you if i wanted to.

All i did was set about testing, i removed the neckcard, and replaced it after i couldnt see anything wrong. I thought i'd fire it up one more time, and it somehow gave me green back?

Regarding the mirrored image on umk3. This is what i found from the mk3 manual:

Monitor: This kit is not intended for use with X-Y monitor. Suitable monitors have horizontally mounted CRT's and raster electronics for red, green, and blue video as well as COMPOSITE NEGATIVE SYNC inputs.

Now i know my U2000 has r, g, b and h+v inputs, (5 wires) but i cant find a comp input. Have i answered my own question here?

[grantspain]

you must have a bad solder joint causing the green problem on the neck card,thats why its so intermittent
you can join h and v sync to make composite but i would imagine the u2000 accepts composite through the h sync anyway

the only way for a picture to be mirror imaged is if the game is meant to be/set for a projection cabinet whether is be crt of rptv

[SirPeale]

Almost all the monitors that use that particular neckboard (U2000, U5000, K7400, K7500) have the same problem with the green transistor.  My favorite theory is that because those transistors run so hot, green gets it the worst because it's right between two other really hot transistors.  I repaired a bunch of neckboards of this type, and most of the time this was the case.

I'd resolder the green transistor (and all the others since you already have it out) and order a new one for when it finally dies.  Because it eventually will.

[rusolinio]

many thanks for the info guys. I love forums like these.....

All my games (ki, ki2, and umk3) are mirrored since ive tried all of them .So do i just swap the horizontal yoke plug to sort it out?

[grantspain]

all you need to do is locate the 2 yokes plugs which i stated earlier and reverse each like i said
the horizontal will be red and blue,so you then connect it so the red now goes where the blue was and the blue where the red was
the vertical will yellow and green so you do the same there with the yellow and green wires

basically you take the plug off and plug back in the other way round

[grantspain]

just reread this,yes just reverse the horizontal yoke plug as its not upside down only mirrored

[rusolinio]

Ahhhh. gaming glory! Everything is sorted now, cheers!

[yukonblaze]

Having the exact same issue with color on my u2000.  Pads have lifted off of neckboard.  My question is how to fix??  I was wondering if I could place jumper wires from B,C,E to traces??  Any help appreciated.