Arcade Collecting > Restorations & repair
Star Wars - fully working!
Spyridon:
Before pulling out the monitor again, I thought I would check all the voltages to make sure they are good. Here is what I am getting:
B+ = 172
-5 = -5.19
+5 = 5.07
10.3 = 11.86
+12 = 11.78
-15 = -15.26
+15 = 14.65
-22 = -24.0
+22 = 23.79
On the two transistors on the side of the monitor cage I'm getting -23.24 and 23.11
x-out fluctuates between .05 and .1
y-out is steady at .633
Shouldn't the y-out be fluctuating?
Level42:
I assume you have the monitor connected to the game PCB set while you measured this ?
If so, I'd expect the y to be fluctuating too.
Spyridon:
--- Quote from: Level42 on April 23, 2009, 06:52:18 am ---I assume you have the monitor connected to the game PCB set while you measured this ?
If so, I'd expect the y to be fluctuating too.
--- End quote ---
I'm almost positive that the monitor was connected, but I did disconnect the monitor at one point in order to pull the boardset out far enough to get to some of the test points. I don't think I did the for the y-out, but I will test again tonight to make sure.
ChadTower:
Those wouldn't happen to be DC measurements, would they? I seem to remember those lines being much higher.
Kevin Mullins:
--- Quote ---Test the Game Board Outputs before Turning the Monitor On.
Make sure the game board is outputting correct voltages before you power the monitor
on! Otherwise you can waste the monitor and all the above work. To test the outputs, set
your meter on DC volts and measure the leads of R600 and R700 (fuses) of the deflection
board. These are connected to the plug with wire colors yellow (R600) and orange
(R700). The correct voltage should be in the +0.5 to -0.5 volt range (basically zero volts).
The voltage will fluctuate because of changing deflection signals. If the measured voltage
is between 5 and 15 volts (positive or negative), then check the X and Y amplifiers on the
GAME board. Also check for broken potentiometers on the game board.
--- End quote ---
http://ionpool.net/arcade/tech/6100_faq.pdf
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