Tempest: a new one on me

Black Matrix

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I am by no means a tech, but I have my fair share of success by either repair attempts or swapping parts out. But my tempest seems like an odd set of problems. First, I was having a game at my house bout 3 months ago. Somewhere during the day, my Tempest monitor just went dark. I assumed it was the monitor as I didn't think I had ever done anything to it. So I pull it and remove the boards for rebuilding. I notice that it looks like I bullet proofed it in the last couple of years and forgot. New LV2000, cap kit, diodes, transistors. So I reassemble it and plug it to my Star Wars. The monitor is fine. So I check my fuses. All are fine. Keep in mind that the game coins up, plays, and has sounds just like the monitor is dead. So I turn up the bright level and I have 2 lines coming from the center of the spot killer dot. One goes diagonal to the corner and the other goes out to the middle right side. So it would seem I have a PCB problem of some type. anyone have any suggestions of a component that would cause the picture to become two lines when it fails. Bad mathbox, quad pokey, AVG chip. Any suggestions. It just seems odd that the game will play, and the monitor is fine, but the screen looks like a couple transistors has gone bad. Thanks in advance guys.
 
Step 1
Measure your +5 +-15 +6.8

Step 2
Put your meter in AC mode and measure X and Y out should be 2-4 AC with Y being a bit higher.
 
I don't think I could find a 6.8 voltage, but I did measure the 32VAC, the +15, -15 , 10.3, -5, and +5, -21, and +21 IIRC. Most were very close with the exception of the -5, which read nearly -15. But at the board, it was reading -5. How would I test the voltages at the Y out and X out? I would put the multimeter in VAC mode and put one prong to the x out and the other to what? I was under the impression you had to have two wires to test
AC just like DC but instead of the Black lead being on ground it would be on the other side of the AC line. From what I recall, I don't think I saw two X outs and Y outs. Is their a site that describes that test better. Thanks and sorry for the delayed reply. I was working on a K6100 that hadn't been working for like 10+ years.
 
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