G05-802 "white dot" repaired

[Dokert]

Asteroids with known good game board, power brick, and A/R I, had only a white dot in the center of the screen.

1. All fuses metered good out of the deflection board
2. All chassis mounted transistors verified to NOT be shorted
3. Tested for +/- 30vdc at P700 & P600. The +30vdc tested good, -30vdc tested bad (0vdc).
4. The -30vdc tested good on the input side of R100, and tested bad (0vdc) on the output side of R100. R100 tested open. Placed a jumper over R100, and picture came up beautifully.

The repair when I get the monitor out of the machine will be... Remove R100 & R101 and replace both with jumpers as per the Tech notes and the FAQ's.

 

[timberterror]

Nice work, is this your machine getting fixed? - Barry

 

[Dokert]

Mine works perfectly, this one belongs to A Davis.

 

[djw90]

Nice job Dave!!!

 

[Dokert]

I would post pics of the fix, but my wife gave the memory card with the pics to a friend. She did some work for them requiring pics, and when I went to upload them the memory card was gone. I know it was in there when I took them.

I used .093 crimp pins on 18awg wire, with shrink tubing.

 

[Deadly]

I would post pics of the fix, but my wife gave the memory card with the pics to a friend.

Hope there weren't any pics of "little dave" on there lol

 

[nazerine]

Tech notes and the FAQ's.

Where might one find these said tech notes and faqs?

 

[Dokert]

Hope there weren't any pics of "little dave" on there lol

I learned long ago back in my Navy days to never leave a camera unattended. Deez nuts or worse would magically appear on your memory card.

 

[Dokert]

Where might one find these said tech notes and faqs?

Here is one of them

http://arcarc.xmission.com/PDF_Monitors/FAQ Black and White XY Version 1.1 dated 7 Feb 02.pdf