RE: Star Wars troubles

The yoke sends an analog voltage (0 to 5V) to an analog to digital
converter. Make sure you see the full voltage swing at the input to the
ADC, and if you are so equipped, take a look at the digital value that the
DAC outputs. You can do this by checking each output line with your volt
meter or oscilloscope. You should see the values increase / decrease as you
move the yoke from stop to stop. Make sure none of the bits are stuck.
 
Does the cursor snap back to one extreme at the half way point? Or does it
simply get to the half way point and then stop moving as you continue to
move the yoke? If it snaps back, you have a stuck output bit.
 
Joel-
 
 
-----Original Message-----
From: owner-vectorlist@vectorlist.org
[mailto:owner-vectorlist@vectorlist.org] On Behalf Of simon
Sent: Friday, October 06, 2006 3:19 PM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Star Wars troubles

Looked through my repair logs for star wars boards and found this:

Board also has a problem with controls, cross target is always trying to
pull to far left even in self test. Bad cap at C47 (YAW input) was reading
.5kohms. Changed cap and controls are now fine.

could be a problem in that area also

----- Original Message -----
From: Joseph Magiera <mailto:joemagiera@ameritech.net>
To: vectorlist@vectorlist.org
Sent: Friday, October 06, 2006 8:01 PM
Subject: VECTOR: Star Wars troubles

My Star Wars is fully working EXCEPT for the game does not respond to the
controller handles being moved up. Actually, it might be down, I don't
recall right now, but it definitely only has a problem in one direction.
 
I suspected the 5K pot in the control panel, but that tested fine. I even
tried another known good pot, and that is not the problem. I checked to be
sure there was nothing inhibiting the movement of the pot and it seems fine.
All voltages off the power supply appear good, and the game is working fine
otherwise, which points to the PCB at this point. Any one have any
suggestions as to what components specifically on the PCB I can test/replace
next? Thanks,

Joe
joemagiera@ameritech.net

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Received on Fri Oct 6 17:55:11 2006