G05 monitor & CAP kit questions

toolguy

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Hello I am new to this board and vid games. Just got my first, Asteroids and it is a mini.

This will be my 6th restoration, I've done 5 pinballs, but first vid and I want to do it right. I can solder chips, sockets, components and just about everything else, but I am new to monitors.


I ordered a CAP kit from Bob Roberts and it will be on the way soon. My monitor was functioning OK, but I doubt it ever had a new kit installed before. So first questions are:

1) Do I need a high voltage probe, or will it bleed down/off after many days?
It has been powered down for 6 days now, due to a power switch that pretty much fell apart on me and will be more as I wait for the CAP kit, Big Blue, switch, and other parts. The one manual states do not use the screw driver short method on this monitor.

2) Does the CAP kit install to the HV board, or the Deflection board? I assume HV board.

Speaking of the deflection baord, the one manual I have and I have both, the BW Vector Monitor Guide and the Quadrascan X-Y monitor, states BEFORE removing the def board, REMOVE THE INPUT SIGNAL FROM THE GAME BOARD BEFORE MOVING TO THE MONITOR.

3) How do I do this?

Again though, the machine has been unplugged for days now. Is it OK to remove this board now?

4) I have heard and read about the High Voltage Diode. Bob R. is out of them, but I tracked down an H1809 which stated it is good for Atari and is just higher voltage. Mine may not need one, but I want one on hand in case.

Can I use this H1809 diode in place of my H1812 safely?


Thanks, I really appreciate the help and do not want to hurt my game!
 
Last edited:
Hello I am new to this board and vid games. Just got my first, Asteroids and it is a mini.

This will be my 6th restoration, I've done 5 pinballs, but first vid and I want to do it right. I can solder chips, sockets, components and just about everything else, but I am new to monitors.


I ordered a CAP kit from Bob Roberts and it will be on the way soon. My monitor was functioning OK, but I doubt it ever had a new kit installed before. So first questions are:

1) Do I need a high voltage probe, or will it bleed down/off after many days?
It has been powered down for 6 days now, due to a power switch that pretty much fell apart on me and will be more as I wait for the CAP kit, Big Blue, switch, and other parts. The one manual states do not use the screw driver short method on this monitor.

2) Does the CAP kit install to the HV board, or the Deflection board? I assume HV board.

Speaking of the deflection baord, the one manual I have and I have both, the BW Vector Monitor Guide and the Quadrascan X-Y monitor, states BEFORE removing the def board, REMOVE THE INPUT SIGNAL FROM THE GAME BOARD BEFORE MOVING TO THE MONITOR.

3) How do I do this?

Again though, the machine has been unplugged for days now. Is it OK to remove this board now?

4) I have heard and read about the High Voltage Diode. Bob R. is out of them, but I tracked down an H1809 which stated it is good for Atari and is just high voltage. Mine may not need one, but I want one on hand in case.

Can I use this H1809 diode in place of my H1812 safely?


Thanks, I really appreciate the help and do not want to hurt my gamge!

I'm not super seasoned here either, but I'm embarking on an Asteroids Cocktail G05 repair myself. If you ordered the Cap Kit from bob, it will contain parts for both the deflection board and the HV board. What his kit does not contain are the giant C100 and C101 caps, which you need (and should) order separately. He calls them "6800uf 50volt radial caps for XY monitors". The new ones are considerably smaller then the old ones, and have two prongs instead of three.

index.php


He explains how to install them on the bottom of his cap map page found here.

Bob suggests cleaning that diode he's out of with some rubbing alcohol, and most of them work after the fact. I've asked him for a "just in case" replacement as well. I've heard they can be found elsewhere, but I haven't located one just yet as I'm focusing now on my main PCB.

I'll be watching closely since you're in my shoes too ;)

-csa
 
Discharge

To discharge the tube on a vector. You need to use a HV probe or a 10 mega ohm resistor. Otherwise you risk dammaging the eht. It will discharge it self after a while though. Not sure how long. 1 day to months possibly.
 
Mine usually discharge after being off for a couple days. I still use the screwdriver method, but there is no pop.
You're fine removing anything from the monitor as long as the whole machine is off. It is best to take the monitor completely out of the game before you begin work.
 
Hello I am new to this board and vid games. Just got my first, Asteroids and it is a mini.

This will be my 6th restoration, I've done 5 pinballs, but first vid and I want to do it right. I can solder chips, sockets, components and just about everything else, but I am new to monitors.


I ordered a CAP kit from Bob Roberts and it will be on the way soon. My monitor was functioning OK, but I doubt it ever had a new kit installed before. So first questions are:

1) Do I need a high voltage probe, or will it bleed down/off after many days?
It has been powered down for 6 days now, due to a power switch that pretty much fell apart on me and will be more as I wait for the CAP kit, Big Blue, switch, and other parts. The one manual states do not use the screw driver short method on this monitor.

2) Does the CAP kit install to the HV board, or the Deflection board? I assume HV board.

Speaking of the deflection baord, the one manual I have and I have both, the BW Vector Monitor Guide and the Quadrascan X-Y monitor, states BEFORE removing the def board, REMOVE THE INPUT SIGNAL FROM THE GAME BOARD BEFORE MOVING TO THE MONITOR.

3) How do I do this?

Again though, the machine has been unplugged for days now. Is it OK to remove this board now?

4) I have heard and read about the High Voltage Diode. Bob R. is out of them, but I tracked down an H1809 which stated it is good for Atari and is just higher voltage. Mine may not need one, but I want one on hand in case.

Can I use this H1809 diode in place of my H1812 safely?


Thanks, I really appreciate the help and do not want to hurt my game!

1. HV probe is best, if you don't have one use a screwdriver with a wire on it to ground.

2. Both.

3. Just unplug everything.

4. If your monitor was working then I wouldn't worry about the diode. I would worry more about resoldering all the connector pins on the boards. I also don't see a need to remove the monitor from the game.
 
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