K6100 Deluxe Cap Kit Project

Robotron Jon

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Slowly working my way though this. I have never worked on this monitor before.

I have installed many of the parts but have run into a few issues:

1) How do you tell the difference between the transistors in the standard cap kit: MPSA06, 2N3904 and MPSA56?

2) I cannot figure out where ZD100 and ZD101 are on the main board. The 1N4750 27v ZDiodes go there. I assume these are the larger diodes that came in the bag.

3) Are the smaller of the diodes that came in the standard cap kit the 1N4148 diodes?

4) The 330ohn 1/4 watt is listed as org/orn/brn but the pieces in the bad don't quite look the same. I assume these are the right ones because ther are no others in there.

5) Finally, the HV board had some burning at D901 but the kit does not include this. The diode replaced near it is ZD902. Should I also replace D901? What is the value of this diode?

Thanks for the help, hopefully I don't sound too ignorant.
 
Made some progress:

1) The transistors had the part number in very tiny lettering on the back.

2) My board has R105 and R104 and I am assuming that is ZD100 and ZD101.

3) Yes the smaller of the diodes that came in the standard cap kit are the 1N4148 diodes.

4) Installed the last pieces in the bag as 330ohn 1/4 watt..pretty sure they were right.

5) I still need to know what goes in D901.

6) The Deluxe package came with a 200v 680f cap. What is this for? The instructions don't mention it.

7) I noticed that this kit does not come with a transistor for the side of the HV cage. Is there supposed to be one?

Thanks.
 
5) test to see if it's bad. If so replace it. Find the value in the manual.

6) I've rebuilt two 6100's in the past week, and neither Deluxe kit had that cap value. Set it aside for when you need a filter cap for a 100v monitor.

7) Nope. they don't go bad very often, so you only need one if it's bad. The kit's just include the common fail parts. the Deluxe kits include ALL of the most-commonly failing parts, instead of just the 10 Top-most common...
 
Slowly working my way though this. I have never worked on this monitor before.

I have installed many of the parts but have run into a few issues:

1) How do you tell the difference between the transistors in the standard cap kit: MPSA06, 2N3904 and MPSA56?
magnifying glass.
2) I cannot figure out where ZD100 and ZD101 are on the main board. The 1N4750 27v ZDiodes go there. I assume these are the larger diodes that came in the bag.
bottom left corner.


4) The 330ohn 1/4 watt is listed as org/orn/brn but the pieces in the bad don't quite look the same. I assume these are the right ones because ther are no others in there.
Meter it or look it up on a resistor chart ( i can't give you ALL the answers free !)
5) Finally, the HV board had some burning at D901 but the kit does not include this. The diode replaced near it is ZD902. Should I also replace D901? What is the value of this diode?
I have in my notes a NTE506, try that.

Thanks for the help, hopefully I don't sound too ignorant.
only when you wanted to know the resistor value :)
 
Made some progress:

2) My board has R105 and R104 and I am assuming that is ZD100 and ZD101.
edit: that does sound right.
4) Installed the last pieces in the bag as 330ohn 1/4 watt..pretty sure they were right.
meter it and make sure, and if you don't know how, then this is the best time to learn. We can walk you through it. Also, look it up on a color chart. Google resistor color code or something like that. You need to be sure.
5) I still need to know what goes in D901.
NTE506
6) The Deluxe package came with a 200v 680f cap. What is this for? The instructions don't mention it.
Got me on that one. Ask Bob.
7) I noticed that this kit does not come with a transistor for the side of the HV cage. Is there supposed to be one?
No.
 
Finished up today, also replaced D901. Put it back in the machine and fired it up.

Game plays blind, has neck glow, spot killer not on, fuses not blowing, no smoking.

Any ideas?
 
Try turning up the brightness? Make sure the brightness wire didn't pop off the back of the knobs inside the HV cage? You should get a dot at the very least....

As said, check the b+, but also check the voltage at the casings of the two frame-mount transistors on the side. One should be about +28vdc (sometimes 26) and the other should be about -28vdc (sometimes -26).
 
Try turning up the brightness? Make sure the brightness wire didn't pop off the back of the knobs inside the HV cage? You should get a dot at the very least....

As said, check the b+, but also check the voltage at the casings of the two frame-mount transistors on the side. One should be about +28vdc (sometimes 26) and the other should be about -28vdc (sometimes -26).

I checked B+ and it is 186. A tad high but I am not sure this would prevent the monitor from working. Transistors were fine.

But I did check the connector to the brightness and focus and that was the problem. So NOW IT WORKS....

Game plays fine but sound went out after a while and was intermittent. Will have to check connections. Also noticed some garbage text such as "GAME OVER" not looking right.

Should I lower the b+ or is the reading okay?

Thanks for the help, I appreciate it. I am very happy to get the monitor working....
 
Last edited:
I lowered it to 181.

The game board needs about 5.8 to run - any lower than that and the game will not work. Not sure if that's normal or not. Low power was causing the intermittent loss of sound so now it's all working...at least for today.
 
If your game board needs 5.8v to run, you might want to check the edge connector on your boards and the actual harness to make sure you have good contact in there or else you are going to fry the edge connector on your board. I don't run mine higher than 5.2v
 
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