Post a Comment On: Arcade and Video Game Modding

Okay,

this is my little friend I was in touch yesterday : The Atari Asteroids PSU:

[Image]First did some cleaning.
Replaced F5 and did some measuring. Noticed that the schematics was somehow tricky and reworked the figures of the manual.

[Image]


[Image]
Measure point of GND is blue spot in Fig 3.

Measure points of fuses is the red spot. This should be the values

F2 vs F3 (7A)= ~15 VAC (VDC after diode cr1, cr2)
F2 vs F3 (3A)= ~36 VAC
F6 (3A) vs GNS= 6.3VAC

Measured

F2 - F3 -> 21V
F2,F3 vs GND -> 10,5V

F4 - F5 -> 38.3V
F4, F5 vs GND -> 19.15V

F6 vs GND : 14.45v

F6 vs F4 : 31.8V (yellow cables)

For first okay, since the load of the monitor is yet to come.

http://www.therealbobroberts.net/apsnotes.html