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Author Topic: Monitor Help  (Read 3679 times)
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Netropolis
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« on: November 22, 2014, 05:29:24 pm »

So I have this Tetris cabinet, I got it today!  It is my third cabinet.
It is pretty clean, and was working when I picked it up.
I was told it was giving the former owner some issues with "No Picture".

Here is where I am at with it...
Turn on the cabinet and the monitor does that tell tale "I am getting power" crackle sound.
According to the multi-meter the power supply is sending 12V out of the 12V screw and 5 V out of the 5V screw.
The game plays it is set to free play, so I can hit 1UP and start a game and hear it, but the tube is black!
It is not brightness or any of the monitor's knobs.
When this left the former owners house - I saw the screen. It actually looked fantastic.

All of the capacitors look great, not so much as a swell or a leak from any.
I have reseated the Jamma Connector a few times.
I have followed every wire to look for cracks or breaks and have found none.

I have one of those screwdrivers with a discharge clip on it, but frankly monitors scare the heck out of me, would discharging the flyback do anything for producing a picture?
If anyone has any advice for me, I would love to try it.

It was working before it's trip up stairs and across the city (on it's back) and down my stairs - but like I said I was told it was having picture issues.

Thanks to anyone willing to lend some keystrokes of advice on my first post!

Go Jets Go!

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1979 Atari Asteroids
1980 Midway Pac-Man (TOTAL Restoration Needed)
1981 Midway Galaga
1982 Atari Pole Position
1986 Atari Championship Sprint
1986 Williams Pin*Bot Pinball
1987 Atari Badlands
1988 Atari Tetris/19-1 Multi-Cade
60-1  DK Jr Cabinet
2002 Hanabi Japanese Slot Machine
John's Arcade
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« Reply #1 on: November 22, 2014, 06:06:13 pm »

Sounds like the GAME PCB is working fine and it's playing fine. Sounds like it's monitor issue exclusively.

Couple of things come to mind...

#1 - Did you adjust the screen knob on the flyback? If you crank it, can you get a picture, anything?
#2 - Is the monitor cable plugged in?
#3 - Are you sure it's getting power? Do you have neckglow? Check fuses on monitor chassis?
#4 - Is it going into HV shutdown? Can you check the B+?

What type of monitor is it? Post some photos if you are not sure.
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Netropolis
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« Reply #2 on: November 22, 2014, 08:25:12 pm »

Hey!

Thanks for the reply!
So I got the picture working!  But it raises more questions than it solved.

While waiting for a reply to my post, I decided to check out the cabinet...  I took off the marquee brackets to clean the light (which was working). I realized the humming was coming from the light itself so I pulled out that fuse thing on top of the light and as soon as I did that... the monitors picture came on!  I thought, NAW!!!  So I turned it off and put that fuse back in. turned the cab back on, and No picture.  Pulled the fuse again and Picture is back!

Here are the answers to your questions:
Quote
#1 - Did you adjust the screen knob on the flyback? If you crank it, can you get a picture, anything?
Yes I tried all the pots
Quote
#2 - Is the monitor cable plugged in?
Yes every molex in the cab was checked and the wires were all attached to the molex's
Quote
#3 - Are you sure it's getting power? Do you have neckglow? Check fuses on monitor chassis?
No neck glow that I could see, the monitor only has one glass fuse it is so deep in the board under the neck I am too chicken to pull it...  (but since it is working I assume it is good)
Quote
#4 - Is it going into HV shutdown? Can you check the B+?
I have heard of High Voltage Shut down, but I don't know what a B+ is...

So since pulling that fuse I have had no issues with the monitor, I adjusted the pots to get the picture nice, it is dark on one side so I think I have to buy a degauss-er wand or something?
(that is a guess)

So any idea why a light (fuse) would affect the monitors picture?

Side Note - ALL the girls in the house are suddenly excited about arcades since I bought this one!



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1979 Atari Asteroids
1980 Midway Pac-Man (TOTAL Restoration Needed)
1981 Midway Galaga
1982 Atari Pole Position
1986 Atari Championship Sprint
1986 Williams Pin*Bot Pinball
1987 Atari Badlands
1988 Atari Tetris/19-1 Multi-Cade
60-1  DK Jr Cabinet
2002 Hanabi Japanese Slot Machine
Netropolis
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« Reply #3 on: November 22, 2014, 08:27:01 pm »

No idea what kind of monitor it is...
Tube is a Phillips
Here are some links to pics

https://www.dropbox.com/s/jves5q1kz0zg5ch/20141122_191251.jpg?dl=0
https://www.dropbox.com/s/p4541f0r2uzkiln/20141122_191244.jpg?dl=0
https://www.dropbox.com/s/z43mwvzxl82kuan/20141122_191203.jpg?dl=0

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1979 Atari Asteroids
1980 Midway Pac-Man (TOTAL Restoration Needed)
1981 Midway Galaga
1982 Atari Pole Position
1986 Atari Championship Sprint
1986 Williams Pin*Bot Pinball
1987 Atari Badlands
1988 Atari Tetris/19-1 Multi-Cade
60-1  DK Jr Cabinet
2002 Hanabi Japanese Slot Machine
Netropolis
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« Reply #4 on: November 22, 2014, 09:08:32 pm »

Update - it's is not working again!
I unplugged it and slid it into its spot and now... Well the monitor isnt working! 
Uggh! 
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1979 Atari Asteroids
1980 Midway Pac-Man (TOTAL Restoration Needed)
1981 Midway Galaga
1982 Atari Pole Position
1986 Atari Championship Sprint
1986 Williams Pin*Bot Pinball
1987 Atari Badlands
1988 Atari Tetris/19-1 Multi-Cade
60-1  DK Jr Cabinet
2002 Hanabi Japanese Slot Machine
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« Reply #5 on: November 22, 2014, 10:10:30 pm »

Looks like a K7000:

http://s261.photobucket.com/user/Pietenpol_bucket/media/Flowchart-WellsGardnerK7000RandyFro.jpg.html
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iankellogg
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« Reply #6 on: November 22, 2014, 10:11:58 pm »

That's a K7000

When you turn the "screen" pot all the way up, the pot is is attached to the flyback (the thing on the left), it should make the screen go completely white. Can you do that?
When the monitor isn't working, can you see a faint orange glow at the base of the neck?
if you get both of those I think your monitor probably works.

Personally I think your video connection is loose between the board and the monitor.
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Netropolis
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« Reply #7 on: November 23, 2014, 01:28:22 pm »

Hey!  K7000 Thank you - Now I know!

The screen pot doesn't make any changes to the picture.
I cqt see any neck-glow when it is not working, *I just had it working that one time (before I moved the cab).
Although the board and back of monitor is pretty dusty.

When the cab is powered up, the monitor makes that tell-tale crackling sound because it IS getting power.

Because it worked just before the move and for a time after a move... I agree I have something loose
Can you suggest where the usual suspects may be on this particular monitor?


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1979 Atari Asteroids
1980 Midway Pac-Man (TOTAL Restoration Needed)
1981 Midway Galaga
1982 Atari Pole Position
1986 Atari Championship Sprint
1986 Williams Pin*Bot Pinball
1987 Atari Badlands
1988 Atari Tetris/19-1 Multi-Cade
60-1  DK Jr Cabinet
2002 Hanabi Japanese Slot Machine
VertexGuy
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« Reply #8 on: November 24, 2014, 11:53:30 pm »



Yeah those will shutdown on you.. I got my first shutdown yesterday (super hang on) once I fixed it monitor popped right back to life.
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Netropolis
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« Reply #9 on: November 27, 2014, 10:09:43 pm »

I ended up calling a local arcade guru he came out showed me how to correctly discharge the monitor so I dont have to be scare to touch it...
he also showed me other things to look for and took the board to recap and reflow it for me... I will try the next one.
Now that I feel a lot more comfortable doing it,

Thanks!
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1979 Atari Asteroids
1980 Midway Pac-Man (TOTAL Restoration Needed)
1981 Midway Galaga
1982 Atari Pole Position
1986 Atari Championship Sprint
1986 Williams Pin*Bot Pinball
1987 Atari Badlands
1988 Atari Tetris/19-1 Multi-Cade
60-1  DK Jr Cabinet
2002 Hanabi Japanese Slot Machine
VertexGuy
Guest
« Reply #10 on: December 01, 2014, 03:11:26 pm »

ill bet you its a loose solder joint.
monitor still gets power, black screen. still has crackle noise.
reflow the board , especially under the b+ adjuster and see what that does.
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