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Wiring a new CRT in a Centipede Upgright
I have a 1981 Centipede Upgright that I have purchased a new CRT for. It is an Imperial 19". The wiring harness is a little different and there are no directions. Does anyone know how I need to connect the old and new harnesses together? I have attached pics of both.
Thanks,
Chris
Thanks,
Chris
Replies to This Discussion
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Permalink Reply by Shane on -
looking at the schematic, your gona take the 6 pin connector coming off the main game connector and match it up with your new 6 pin monitor connector.
The 6 pin connector that operates the monitor functions are as followed.
1. Yellow/red wire connects to red wire on your new monitor connector
2. Yellow/green wire connects to green wire on your new monitor connector
3. Yellow/blue wire connects to blue wire on your new monitor connector.
4. Green/white wire should connect to black wire on your new monitor connector (This should be the ground wire)
5. Red/white wire should connect to yellow wire on your new monitor connector (This should be your vertical sync wire)
6. Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire)
Dont worry about shocking yourself or mixing up the wires up on accident. They are low voltage wires and should not harm you if they touch you. Just loosely wire them together so you know the wires are in the correct position before you make a connector between them or if you plan to hard wire them together or how ever you plan to fuse them together.
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Permalink Reply by Chris Gillham on -
Thanks so much! I will give this a try this weekend.
Chris
Shane Ritter said:looking at the schematic, your gona take the 6 pin connector coming off the main game connector and match it up with your new 6 pin monitor connector.
The 6 pin connector that operates the monitor functions are as followed.
1. Yellow/red wire connects to red wire on your new monitor connector
2. Yellow/green wire connects to green wire on your new monitor connector
3. Yellow/blue wire connects to blue wire on your new monitor connector.
4. Green/white wire should connect to black wire on your new monitor connector (This should be the ground wire)
5. Red/white wire should connect to yellow wire on your new monitor connector (This should be your vertical sync wire)
6. Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire)
Dont worry about shocking yourself or mixing up the wires up on accident. They are low voltage wires and should not harm you if they touch you. Just loosely wire them together so you know the wires are in the correct position before you make a connector between them or if you plan to hard wire them together or how ever you plan to fuse them together.
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Permalink Reply by Chris Gillham on
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Shane,
I hope you can provide some more insight. I connected the wires as you indicated and all I got was squiggles. I had seen another thread where they said the horizontal sync wire wasn't used so I tried removing it and the I am able to get a picture now. I am not able to get the entire screen to fill using the horizontal position pot, if I keep the screen image level. If I let it skew, I can fill most of the screen, but it is harder to play the game. Any ideas on how to get the screen set correctly?
BTW, this is a Betson Imperial 19" (Kortek KTN-2001) I got from ArcadeShop.com.
Pictures attached below.
Thanks,
Chris
St. Louis, MO
Shane Ritter said:looking at the schematic, your gona take the 6 pin connector coming off the main game connector and match it up with your new 6 pin monitor connector.
The 6 pin connector that operates the monitor functions are as followed.
1. Yellow/red wire connects to red wire on your new monitor connector
2. Yellow/green wire connects to green wire on your new monitor connector
3. Yellow/blue wire connects to blue wire on your new monitor connector.
4. Green/white wire should connect to black wire on your new monitor connector (This should be the ground wire)
5. Red/white wire should connect to yellow wire on your new monitor connector (This should be your vertical sync wire)
6. Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire)
Dont worry about shocking yourself or mixing up the wires up on accident. They are low voltage wires and should not harm you if they touch you. Just loosely wire them together so you know the wires are in the correct position before you make a connector between them or if you plan to hard wire them together or how ever you plan to fuse them together. - Attachments:
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IMG_9272a.jpg, 90 KB -
IMG_9270.JPG, 141 KB
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IMG_9273.JPG, 114 KB
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Permalink Reply by Shane on
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Chris Gillham said:Shane,
I hope you can provide some more insight. I connected the wires as you indicated and all I got was squiggles. I had seen another thread where they said the horizontal sync wire wasn't used so I tried removing it and the I am able to get a picture now. I am not able to get the entire screen to fill using the horizontal position pot, if I keep the screen image level. If I let it skew, I can fill most of the screen, but it is harder to play the game. Any ideas on how to get the screen set correctly?
BTW, this is a Betson Imperial 19" (Kortek KTN-2001) I got from ArcadeShop.com.
Pictures attached below.
Thanks,
Chris
St. Louis, MO
Shane Ritter said:looking at the schematic, your gona take the 6 pin connector coming off the main game connector and match it up with your new 6 pin monitor connector.
The 6 pin connector that operates the monitor functions are as followed.
1. Yellow/red wire connects to red wire on your new monitor connector
2. Yellow/green wire connects to green wire on your new monitor connector
3. Yellow/blue wire connects to blue wire on your new monitor connector.
4. Green/white wire should connect to black wire on your new monitor connector (This should be the ground wire)
5. Red/white wire should connect to yellow wire on your new monitor connector (This should be your vertical sync wire)
6. Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire)
Dont worry about shocking yourself or mixing up the wires up on accident. They are low voltage wires and should not harm you if they touch you. Just loosely wire them together so you know the wires are in the correct position before you make a connector between them or if you plan to hard wire them together or how ever you plan to fuse them together.
By your attached pics, looks like your making good progress. I think you might have the wires correct however as you state the picture is not all in frame. I think at this point it just might be a simple tweaking issue. from your first attached pic i noticed there is a H-S pot... i believe that is really called ( H-Size ) which by tweaking that pot should decrease the whole picture and bring it back into frame. If you havent already, try adjusting that pot.
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Permalink Reply by Shane on
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Also, here is a tip for adjusting your monitor pots.
To get myself to understand the pot functions i start by centering each pot to its midway point as a baseline starting point. If you'll notice when you adjust each pot they have a rib or split line on the pot/wheel that indicates its current position. You should start with them all facing in the upward direction. Adjust each pot one at a time and with each adjustment check on the monitor what that adjustment has done. And go down the line until you find and understand what each pot has done until you get the final screen settings your looking for. Hope that helps.
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Permalink Reply by Chris Gillham on
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Well, I have spent hours on fiddling with the pots and am in the same position as before I started. Is there any knowledge on how to get the picture to use the full screen on the Kortec monitor?
Chris
Shane Ritter said:Also, here is a tip for adjusting your monitor pots.
To get myself to understand the pot functions i start by centering each pot to its midway point as a baseline starting point. If you'll notice when you adjust each pot they have a rib or split line on the pot/wheel that indicates its current position. You should start with them all facing in the upward direction. Adjust each pot one at a time and with each adjustment check on the monitor what that adjustment has done. And go down the line until you find and understand what each pot has done until you get the final screen settings your looking for. Hope that helps.
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Permalink Reply by Shane on
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Chris Gillham said:Well, I have spent hours on fiddling with the pots and am in the same position as before I started. Is there any knowledge on how to get the picture to use the full screen on the Kortec monitor?
Chris
Shane Ritter said:Also, here is a tip for adjusting your monitor pots.
To get myself to understand the pot functions i start by centering each pot to its midway point as a baseline starting point. If you'll notice when you adjust each pot they have a rib or split line on the pot/wheel that indicates its current position. You should start with them all facing in the upward direction. Adjust each pot one at a time and with each adjustment check on the monitor what that adjustment has done. And go down the line until you find and understand what each pot has done until you get the final screen settings your looking for. Hope that helps.
So what did the H-S pot do when you adjusted it ? what pot adjustments are correctly working?? If that didnt do anything then we need to change up a wire or two for the syncs. I suspect because the horizontal wire is disconnected this must be part of the problem which may explain why there is no control over the horizontal size.. Im sure this is just a matter of finding the right wires that should work together. Im sure you have the Red, Blue and Green connected correctly, so you probably dont have to mess with them. in the mean time Can you provide me with the full model number and name brand monitor i might be able to locate a wiring diagram for you. If we cant find one, your gona just have to wing it until you find the right combination of wires that work together. Unfortunately not all monitors are created equal. Here also, is the game schematic so you can see for yourself how the monitor connections coming from the game should work with the monitor. http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Centipede/Centipede... I did notice that there is no ground off that game connector acording to the schematic it says "Vid RET" which i think is video return. that could also be a possible problem. Maybe the ground wire is not supose to go to that wire ???
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Permalink Reply by Chris Gillham on
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Thanks for the schematic. I took a few days break and am back at this now. I have a Betson Imperial 19" (Kortek KTN-2001). It didn't come with any documentation, unfortunately. If I leave the Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire) disconnected, I get a picture and can play the game, but it is a bit skewed if I fill the screen with the picture. If I make the picture not skew and be level, then the (C) Atari 1981 at the bottom of the screen and the snake head are below the view off the screen (not visible).
If I connect that last wire, the screen will scroll diagonally. I tried removing the black (Ground/Return) and it just seemed to cause the colors to wash out. If I connect it, the colors are brighter.
Latest picture attached.
Thanks for any help!!!!
There is a horizonal POT (H-RES) on the monitor that I have been tweaking, but it doesn't seem to affect the situation. There are a few more pots, but I can't figure out what they do.
I also noticed the CRT needs a serious degausing. Would that affect the skewing of the picture?
Shane Ritter said:Chris Gillham said:Well, I have spent hours on fiddling with the pots and am in the same position as before I started. Is there any knowledge on how to get the picture to use the full screen on the Kortec monitor?
Chris
Shane Ritter said:Also, here is a tip for adjusting your monitor pots.
To get myself to understand the pot functions i start by centering each pot to its midway point as a baseline starting point. If you'll notice when you adjust each pot they have a rib or split line on the pot/wheel that indicates its current position. You should start with them all facing in the upward direction. Adjust each pot one at a time and with each adjustment check on the monitor what that adjustment has done. And go down the line until you find and understand what each pot has done until you get the final screen settings your looking for. Hope that helps.
So what did the H-S pot do when you adjusted it ? what pot adjustments are correctly working?? If that didnt do anything then we need to change up a wire or two for the syncs. I suspect because the horizontal wire is disconnected this must be part of the problem which may explain why there is no control over the horizontal size.. Im sure this is just a matter of finding the right wires that should work together. Im sure you have the Red, Blue and Green connected correctly, so you probably dont have to mess with them. in the mean time Can you provide me with the full model number and name brand monitor i might be able to locate a wiring diagram for you. If we cant find one, your gona just have to wing it until you find the right combination of wires that work together. Unfortunately not all monitors are created equal. Here also, is the game schematic so you can see for yourself how the monitor connections coming from the game should work with the monitor. http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Centipede/Centipede... I did notice that there is no ground off that game connector acording to the schematic it says "Vid RET" which i think is video return. that could also be a possible problem. Maybe the ground wire is not supose to go to that wire ??? - Attachments:
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Permalink Reply by Shane on
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Chris Gillham said:Thanks for the schematic. I took a few days break and am back at this now. I have a Betson Imperial 19" (Kortek KTN-2001). It didn't come with any documentation, unfortunately. If I leave the Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire) disconnected, I get a picture and can play the game, but it is a bit skewed if I fill the screen with the picture. If I make the picture not skew and be level, then the (C) Atari 1981 at the bottom of the screen and the snake head are below the view off the screen (not visible).
If I connect that last wire, the screen will scroll diagonally. I tried removing the black (Ground/Return) and it just seemed to cause the colors to wash out. If I connect it, the colors are brighter.
Latest picture attached.
Thanks for any help!!!!
There is a horizonal POT (H-RES) on the monitor that I have been tweaking, but it doesn't seem to affect the situation. There are a few more pots, but I can't figure out what they do.
I also noticed the CRT needs a serious degausing. Would that affect the skewing of the picture?
Shane Ritter said:Chris Gillham said:Well, I have spent hours on fiddling with the pots and am in the same position as before I started. Is there any knowledge on how to get the picture to use the full screen on the Kortec monitor?
Chris
Shane Ritter said:Also, here is a tip for adjusting your monitor pots.
To get myself to understand the pot functions i start by centering each pot to its midway point as a baseline starting point. If you'll notice when you adjust each pot they have a rib or split line on the pot/wheel that indicates its current position. You should start with them all facing in the upward direction. Adjust each pot one at a time and with each adjustment check on the monitor what that adjustment has done. And go down the line until you find and understand what each pot has done until you get the final screen settings your looking for. Hope that helps.
So what did the H-S pot do when you adjusted it ? what pot adjustments are correctly working?? If that didnt do anything then we need to change up a wire or two for the syncs. I suspect because the horizontal wire is disconnected this must be part of the problem which may explain why there is no control over the horizontal size.. Im sure this is just a matter of finding the right wires that should work together. Im sure you have the Red, Blue and Green connected correctly, so you probably dont have to mess with them. in the mean time Can you provide me with the full model number and name brand monitor i might be able to locate a wiring diagram for you. If we cant find one, your gona just have to wing it until you find the right combination of wires that work together. Unfortunately not all monitors are created equal. Here also, is the game schematic so you can see for yourself how the monitor connections coming from the game should work with the monitor. http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Centipede/Centipede... I did notice that there is no ground off that game connector acording to the schematic it says "Vid RET" which i think is video return. that could also be a possible problem. Maybe the ground wire is not supose to go to that wire ???
Ok, I think i found your manual http://arcarc.xmission.com/PDF_Monitors/Imperial.pdf and the schematic http://arcarc.xmission.com/PDF_Monitors/KT2001N%20Schematic.pdf Have a look at it and see if you can make some head way with it. The pots are clearly labled in the manual and looks like the monitor connector is straight forward as well. Its just got to be a matter of matching the right wires and tweaking the pots. The note i read about the deguass said that your monitor has automatic degausser coils in it so im not sure why you would have to manual degauss it. Study the manual and you should be able to figure things out. : )
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Permalink Reply by Chris Gillham on
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I am still working on this, but am beginning to think I have a bad monitor, based on another discussion with Adam from adamsarcade.com. This monitor is new and it has a color issue as shown in the attached photos. Also, I just can't seem to get the picture to come into frame no matter how I tweak the pots. I have also attached a picture of the circuit board as it has a few more pots, but am not sure what they do and can't quite tell from the schematics.
Shane Ritter said:Chris Gillham said:Thanks for the schematic. I took a few days break and am back at this now. I have a Betson Imperial 19" (Kortek KTN-2001). It didn't come with any documentation, unfortunately. If I leave the Violet/white wire should connect to white wire on your new monitor connector (This should be your horizontal sync wire) disconnected, I get a picture and can play the game, but it is a bit skewed if I fill the screen with the picture. If I make the picture not skew and be level, then the (C) Atari 1981 at the bottom of the screen and the snake head are below the view off the screen (not visible).
If I connect that last wire, the screen will scroll diagonally. I tried removing the black (Ground/Return) and it just seemed to cause the colors to wash out. If I connect it, the colors are brighter.
Latest picture attached.
Thanks for any help!!!!
There is a horizonal POT (H-RES) on the monitor that I have been tweaking, but it doesn't seem to affect the situation. There are a few more pots, but I can't figure out what they do.
I also noticed the CRT needs a serious degausing. Would that affect the skewing of the picture?
Shane Ritter said:Chris Gillham said:Well, I have spent hours on fiddling with the pots and am in the same position as before I started. Is there any knowledge on how to get the picture to use the full screen on the Kortec monitor?
Chris
Shane Ritter said:Also, here is a tip for adjusting your monitor pots.
To get myself to understand the pot functions i start by centering each pot to its midway point as a baseline starting point. If you'll notice when you adjust each pot they have a rib or split line on the pot/wheel that indicates its current position. You should start with them all facing in the upward direction. Adjust each pot one at a time and with each adjustment check on the monitor what that adjustment has done. And go down the line until you find and understand what each pot has done until you get the final screen settings your looking for. Hope that helps.
So what did the H-S pot do when you adjusted it ? what pot adjustments are correctly working?? If that didnt do anything then we need to change up a wire or two for the syncs. I suspect because the horizontal wire is disconnected this must be part of the problem which may explain why there is no control over the horizontal size.. Im sure this is just a matter of finding the right wires that should work together. Im sure you have the Red, Blue and Green connected correctly, so you probably dont have to mess with them. in the mean time Can you provide me with the full model number and name brand monitor i might be able to locate a wiring diagram for you. If we cant find one, your gona just have to wing it until you find the right combination of wires that work together. Unfortunately not all monitors are created equal. Here also, is the game schematic so you can see for yourself how the monitor connections coming from the game should work with the monitor. http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Centipede/Centipede... I did notice that there is no ground off that game connector acording to the schematic it says "Vid RET" which i think is video return. that could also be a possible problem. Maybe the ground wire is not supose to go to that wire ???
Ok, I think i found your manual http://arcarc.xmission.com/PDF_Monitors/Imperial.pdf and the schematic http://arcarc.xmission.com/PDF_Monitors/KT2001N%20Schematic.pdf Have a look at it and see if you can make some head way with it. The pots are clearly labled in the manual and looks like the monitor connector is straight forward as well. Its just got to be a matter of matching the right wires and tweaking the pots. The note i read about the deguass said that your monitor has automatic degausser coils in it so im not sure why you would have to manual degauss it. Study the manual and you should be able to figure things out. : ) - Attachments:
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IMG_0013.JPG, 2 MB
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IMG_0016.JPG, 3.4 MB
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IMG_0019.JPG, 2.8 MB
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Permalink Reply by Shane on
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Only other thing i can contribute is perhaps trying to degauss and see if that makes any difference. Also there should be color pots on your deflection board which should enable to adjust the Blue, Red, and Green colors. Yellow may also be present to adjust as well. If you feel confidant that all your wires are correctly hooked up and adjusting the pots still can not get your game into preportion, you might actually have a problem with that monitor. I dont believe the game board would have any effect on the conditions that your experiancing and i asume you have put the game through self test mode to check for errors ?
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Permalink Reply by Captain Pinball on -
No doubt in my mind you have at least a gausing problem. Depends on how new the monitor is but most will automatically degause itself. If not you will have to degause the old fashion way.
Shane Ritter said:Only other thing i can contribute is perhaps trying to degauss and see if that makes any difference. Also there should be color pots on your deflection board which should enable to adjust the Blue, Red, and Green colors. Yellow may also be present to adjust as well. If you feel confidant that all your wires are correctly hooked up and adjusting the pots still can not get your game into preportion, you might actually have a problem with that monitor. I dont believe the game board would have any effect on the conditions that your experiancing and i asume you have put the game through self test mode to check for errors ?
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