Dragon's Lair Fans - Arcade Lifestyle
General Chat => Technical Area => Topic started by: Belike on February 20, 2011, 04:58:05 PM
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My Pac & Paint's monitor acts very strange, there is bad focus and some convergence problems on the title screen, but when the demo or a new game starts, there is a normal bright screen.(the right side of the monitor is a bit purple, but I guess it's a degaussing problem).
I tried to adjust the focus when the title screen appears, but it didn't help.
I left the machine switched on more than an hour long and all the focus gone, even when I play the game.
I turned it on again after a few hours and the focus came back, but just for the gameplay, the title screen is the same without focus.
Some pics:
(https://lh4.googleusercontent.com/_-UA8BV99Des/TWE4Ry8nBlI/AAAAAAAACUA/E08IYG-A1t4/s576/Pac%20%26%20Paint%20monitor%20004.jpg)
(https://lh3.googleusercontent.com/_-UA8BV99Des/TWE4RbM8LpI/AAAAAAAACT8/hj9spmuuk40/s576/Pac%20%26%20Paint%20monitor%20003.jpg)
(https://lh4.googleusercontent.com/_-UA8BV99Des/TWE4Q5T3GGI/AAAAAAAACT4/4786dB5Xvp8/s576/Pac%20%26%20Paint%20monitor%20002.jpg)
And a bad quality video:
http://www.youtube.com/watch?v=hMiu-424jow
Any input would be appreciated. ::)
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Turn back your contrast and brightness or screen voltage on your flyback
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Turn back the brightness pot (I don't mean the SCREEN pot on the HVT but the real "brightness" pot.
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Haha, Robin and I posted at the same time. I don't think it's the "screen" pot though Robin because then the dark area's on the screen would light up too....
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Ok, how is the flyback look like? ::)
And if we talk about flybacks, do you know any existing sources where I can buy some for hantarex 900 and 9000?
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HVT=Flyback. Looks like this:
(http://electronicrepairguide.com/flyback1.jpg)
The mostly have only 2 pots though (this one has three)
Here's an explanation:
http://electronicrepairguide.com/flyback-transformers.html
But as I mentioned I think you shouldn't touch it. First the brightness back (and maybe the contrast)
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The MTC 900 that is used in the zacc's dont have the 2 pots on the flyback itself..
the focus is on the "block" on the neckboard (folow the wire that comes from the "suction cup" on your monitor to the neckboard)
The brightness is also on the neckboard, and you can put your trimkey or screwdriver through the hole in the neckboard to ajust it:
(http://www.opdenkelder.com/pics/han01.jpg)
(http://www.opdenkelder.com/pics/han02.jpg)
its 21 and 22
ps i wish you luck without a desolder station if you want to replace them.... ::)
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Thanks for the input. ;)
Any ideas where to buy replacement flybacks?
I have 3 other monitors with dead ones. ::)
Maybe this (http://www.therealbobroberts.net/parts.html#flyback) will fit?
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Wasn't there a French shop selling them ?
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http://www.coin.demon.co.uk/-video.htm#otherm (http://www.coin.demon.co.uk/-video.htm#otherm)
is a site that i found. i'm trying to fix up 2 hantrax monitors my self. the type i'm working on is MTC9110.
The site also has some information about fixing the monitors and a check for fixing basic problems.
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Not sure there's a MTC900 replacement flyback... be sure it fits your model because Hantarex MTC900, MTC900/E, MTC9000 are completely different models
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http://www.donberg.ie/descript/h/hr_6051.htm (http://www.donberg.ie/descript/h/hr_6051.htm)
200 € :o
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http://www.donberg.ie/descript/h/hr_6051.htm (http://www.donberg.ie/descript/h/hr_6051.htm)
200 € :o
Interesting price! :o
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dont know if that is the correct flyback, there are more than 1 revisions of the chassis:
MTC900. This has two main boards, one about half the size of the other. The main feature is the Brightness, Contrast and Degaussing controls mounted on a black plastic bracket. This are on a long fly lead and is either mounted on the chassis or remotely in the cabinet. This plugs into the smaller board on the left. There is also the main power supply board mounted vertically on the chassis side to the left. The scan coil plug is on the far right hand side.
There are two versions of this chassis. To determine which type you have, you need to look at IC3 mounted on a heatsink just behind the six set up controls on the main board. If you have a TDA1470 (pins on both sides) mounted on a "U" shaped heatsink you have version 1 and if you have a TDA 2653A (pins staggered on one side only) mounted on a "L" shaped heatsink you have version 2. (This is also used on the MTC900E, look at other features too). The manual for version two only reflects this in the circuit diagram, and not in the pictures or on the cover.
source (http://www.coin.demon.co.uk/monitor.htm)
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dont know if that is the correct flyback, there are more than 1 revisions of the chassis:
MTC900. This has two main boards, one about half the size of the other. The main feature is the Brightness, Contrast and Degaussing controls mounted on a black plastic bracket. This are on a long fly lead and is either mounted on the chassis or remotely in the cabinet. This plugs into the smaller board on the left. There is also the main power supply board mounted vertically on the chassis side to the left. The scan coil plug is on the far right hand side.
There are two versions of this chassis. To determine which type you have, you need to look at IC3 mounted on a heatsink just behind the six set up controls on the main board. If you have a TDA1470 (pins on both sides) mounted on a "U" shaped heatsink you have version 1 and if you have a TDA 2653A (pins staggered on one side only) mounted on a "L" shaped heatsink you have version 2. (This is also used on the MTC900E, look at other features too). The manual for version two only reflects this in the circuit diagram, and not in the pictures or on the cover.
source (http://www.coin.demon.co.uk/monitor.htm)
Thanks Etienne. ;)
I took this week off from work to take care of my cabs, I will investigate which type of the chassis I have.
Prepare for a lot of noob, aracde related questions! ;D ;D ;D
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Regarding the noob (and with all respect Belike): are you sure that the Flybacks are really bad ? Maybe there is another problem instead ?
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I think also that the flyback is not broken
Try first your contrast , brightness and maby your screen pot ON your flyback
If this not work do a cap kit
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Regarding the noob (and with all respect Belike): are you sure that the Flybacks are really bad ? Maybe there is another problem instead ?
I think also that the flyback is not broken
Try first your contrast , brightness and maby your screen pot ON your flyback
If this not work do a cap kit
The flyback is for the other 2 monitors, I will try what you advised of course with this one tomorrow(today). ;D
An old friend of mine who is an expert of monitor repairing told me, that the other 2 need a new flyback.
Unfortunately he is not around, he is working for a guy all the time, who is completely insane, he bought about 100 classic pinballs from the past 40 years and planning to open an arcade in the heart of Budapest. ;D
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I like this kind of insane people !
Hope he will succeed !!!
And it would give an extra reason for a vist to Budapast !!! (Wish he could hire me, but hey, I'm way too expensive ;D ;D ;D ;D ;D ;D ;D ;D)
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..... maby your screen pot ON your flyback
This model does not have the pot ON the flyback...
it really does not have any pots on the flyback, just on the neckboard.. (wich is a different brightness than the other elsewhere on the board), so i think this pot IS the "screen voltage" ???
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Also people should be aware that if the flyback has gone theres a 90% certain chance the HOT has gone also (I dont have a manual to hand to tell you the part number or location ref sorry)
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I did exactly what André and Robin advised, the screen is perfect. :D
Thanks guys. ;)
All I have to do, is to find some degaussing equipment.
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I did exactly what André and Robin advised, the screen is perfect. :D
Thanks guys. ;)
All I have to do, is to find some degaussing equipment.
check this one out ;) I have a simular tool works out great!
http://cgi.ebay.nl/240V-DEGAUSSING-Wand-Repair-Monitor-Tube-For-TVS-Arcade-/190480871335?pt=LH_DefaultDomain_0&hash=item2c598b6fa7 (http://cgi.ebay.nl/240V-DEGAUSSING-Wand-Repair-Monitor-Tube-For-TVS-Arcade-/190480871335?pt=LH_DefaultDomain_0&hash=item2c598b6fa7)
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(http://img.mypicturetown.com/cache/omgz8aYLtec7ic.r3Eja5iKGhsbzNFEo62qvAiSi9aLPjfZUFmOsIbcrdj*t_E7/item.JPG?rot=1)
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Or the one that ully got, only remember his trouble with almost melting ;D
https://www.dragonslairfans.com/smfor/index.php?topic=1400.msg26942#msg26942 (https://www.dragonslairfans.com/smfor/index.php?topic=1400.msg26942#msg26942)
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Try a big drill the have a big magnetic field
power it up and go slow away from your monitor
Maybe it works
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Or the one that ully got, only remember his trouble with almost melting ;D
https://www.dragonslairfans.com/smfor/index.php?topic=1400.msg26942#msg26942 (https://www.dragonslairfans.com/smfor/index.php?topic=1400.msg26942#msg26942)
haha that's the same I have! It looks like the one I spotted on ebay is more solid.
I guess the price is also very reasonable 10$ (excluding shipping)
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Thanks for the tips, I think I will try that cheap stuff from Hong Kong after a test with the driller. ;D
I've heard, that a soldering iron could also help in this case, but it didn't work with mine.
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The only soldering iron i can imagine that does something like that will be this model:
(http://www.radiosjaak.nl/img/283px/WEL-9200UC.JPG)
but then again, only i can imagine, i dont know if it does..
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I found this and the seller said it's perfect for degaussing monitors.
What do you think?
http://www.vatera.hu/item/view/index.php?cod=1444602972
The guy from Hong Kong have 122 negative feedbacks in the past 12 months, I would rather pay a bit more and this one is in Budapest.
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I would buy that one right away. Made in Germany, can't be worse than made in China.
Plus it also has a clear warning that is valid for ALL degaussers:
(Ully, please note ! ;) ):
(http://n1.vatera.hu/photos/c5/4e/a165_3_big.jpg)
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Yes, go for it !
as i see this , i can imagine this will degauss harddrives, floppy's and tapes also ;D
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Yes, go for it !
as i see this , i can imagine this will degauss harddrives, floppy's and tapes also ;D
Yeah, looks like a strong beast, already bought it on a reduced price, stay tuned.... ;)
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Yes, go for it !
as i see this , i can imagine this will degauss harddrives, floppy's and tapes also ;D
Yes that's what I thought too, definitely keep that stuff FAR from it when in use :)
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Yes, go for it !
as i see this , i can imagine this will degauss harddrives, floppy's and tapes also ;D
Yes that's what I thought too, definitely keep that stuff FAR from it when in use :)
Good to know, thanks for the info, I guess I wouldn't have to use it on my Pole Position 2 mame cab then. ;D
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This triggered my curiosity..
So i did a field test on a Floppy ;D
http://www.youtube.com/watch?v=UnKCkXwnwhM (http://www.youtube.com/watch?v=UnKCkXwnwhM)
Its a bit blurry, sorry for that, but the result is clearly visible i think 8)
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LOL !
Didn't your rings started heating up your fingers ? ;)
Also, I'm really not that surprised. We used to do back-up of programmings of fire alarms on floppies and put them in the fire-alarm centrals. Very very many failed after a year or two.
Actually, I have a good number of 5.25" floppies from the mid 80's that STILL are ok.
I think there are two causes:
1) the last 3.5" floppies were complete rubbish quality
2) the 5.25" had much wider tracks, and much less data to hold which makes it a bit easier for them
We switched to CD's but not much later we started to back-up through FTP on a server at the company because we now all have internet on our laptops....
Anyway, the 3.5" floppy.....it's already a thing of the past....I still remember people complaining that floppy drives were removed from Macs.....mmmmm :)
Only stupid old OS-es still needs floppies sometimes ;)
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That beast is laying in my car's floor atm., it's extremly heavy, I will try it out in the evening and inform you about the results asap.Unfortunately I can't open youtube links in my office, but I have ideas what happened with that floppy. ;D
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Don't forget to film and protect yourself while testing this beast.
Not to see how strong you are by lifting this thing, but i want to see your protective hat ;D
(http://www.matthijs.org/files/images/aluhoedje.jpg)
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Wow, this equipment has a very strong effect, I placed it 1 meter far from the monitor, facing the opposite direction and the screen started to shake. :o
Take a look at it's weight:
(https://lh4.googleusercontent.com/_-UA8BV99Des/TXUdOZJ5gyI/AAAAAAAACdc/82vEkojLq5c/s800/Degaussing%20wand%20001.jpg)
Before and after pic:
(https://lh3.googleusercontent.com/_-UA8BV99Des/TXUpPlmHcBI/AAAAAAAACd0/B0XJNgkVhUU/Pac%20%26%20Paint%20monitor%20002b.JPG)
And a very bad quality video, it was hard to hold that equipment and the camera at the same time, but you can see in the very end, that the the screen became perfect after a few seconds of degaussing ;D
http://www.youtube.com/watch?v=2w88li3Tj-w
Thanks to all of you, who helped me out in this. ;D
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Wow, that's a BEAST ! Be careful indeed :)
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Wow, that's a BEAST ! Be careful indeed :)
Thanks for the warning André, to be honest I was really scared when I used that thing and I will take extreme caution in the future also. ;)
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Always use the "ALU-HAT" when degaussing with this SOB ;D
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Always use the "ALU-HAT" when degaussing with this SOB ;D
Lol, is it really helps staying alive or it's just a joke? ;D
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Depends on your local earth magnetism Belike...not sure how it is there in Hungary, but here it helps....
;D
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Always use the "ALU-HAT" when degaussing with this SOB ;D
Lol, is it really helps staying alive or it's just a joke? ;D
It sure does .. ;D
Before i log into this forum, i always take my alu hat :D
(http://www.opdenkelder.com/pics/aluhat.jpg)
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Whaha, Etienne's here and we found out where Belike's degaussing coil comes from:
http://www.youtube.com/watch?v=ifcHwi7IVNc&feature=related
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Always use the "ALU-HAT" when degaussing with this SOB ;D
Lol, is it really helps staying alive or it's just a joke? ;D
It sure does .. ;D
Before i log into this forum, i always take my alu hat :D
(http://www.opdenkelder.com/pics/aluhat.jpg)
Whaha, Etienne's here and we found out where Belike's degaussing coil comes from:
http://www.youtube.com/watch?v=ifcHwi7IVNc&feature=related
LOL ;D ;D ;D
What are you doing there? ::)
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Nice pic Etienne ;D ;D ;D
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LOL ;D ;D ;D
What are you doing there? ::)
Alu sticker business ;)