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Archived from groups: rec.games.pinball (More info?)
Greetings fellow pinheads.
I have recently been trying to "fix" my Space Shuttle. The background:
After playing the game reliably during a gathering at my house, the next
time I turned it on it immediately started resetting (typically, before the
ball even got ejected into the shooter lane). I tried all of the typical
power supply fixes (winding up with essentially a new power supply in the
end). Sometime early in the power supply debug, the sound also stopped
working.
None of this fixing of the power supply really worked out, so I wound up
purchasing another power supply and a system 11 board (along with System 11
versions of Space Shuttle ROMs) off eBay. After plugging in the new boards
I found that I still had the same problems. I tracked at least one problem
down to a short in the playfield (which in itself is weird, since one time
it worked, the next time it didn't, no real opportunity of fiddling with
anything to cause the short).
The game now plays fine as a system 11, but I have no audio (at all, no
background, no voice, nothing). The system 11 board came to me as "verified
working," but since I purchased it from another collector, I don't really
know the audio worked before it got to me. I can verify that the amp and
connection to the speakers is good, as increasing the volume pot lets me
"hear" the lights during attract mode (famous audio crosstalk problem of
system 11 and system 9 pins). The board being used is a system 11, revision
B (that is to say: A plain old System 11, not System 11A, B or C, but
System 11 with the 7 segment LED display, board revision B).
I think its conceivable I have a problem with the jumper settings. There is
something on the order of 15 jumpers on the board and I don't know what they
do as they don't appear to be documented anywhere. I'm thinking that I may
have to set something with these jumpers to get the proper ROM size. I also
identified another spot that looked like it may originally have been for DIP
switches, labeld in the silkscreen as DS-1 and DS-2. DS-1 has both
positions connected with a wire jumper, and DS-2 has no connections at all.
Anyone know what DS-1 and DS-2 do on a System 11 board?
Has anyone else upgraded a system 9 pin with a system 11 board and seen
similar problems with the sound?
Any help on this appreciated. I am probably very close to restoring full
functionality to my space shuttle game, but I'm a bit frustrated with the
audio debug right now... I hate to just start randomly desoldering and
replacing things like the audio op-amps if I have a simple setting
incorrect..
Thanks,
Scott
Greetings fellow pinheads.
I have recently been trying to "fix" my Space Shuttle. The background:
After playing the game reliably during a gathering at my house, the next
time I turned it on it immediately started resetting (typically, before the
ball even got ejected into the shooter lane). I tried all of the typical
power supply fixes (winding up with essentially a new power supply in the
end). Sometime early in the power supply debug, the sound also stopped
working.
None of this fixing of the power supply really worked out, so I wound up
purchasing another power supply and a system 11 board (along with System 11
versions of Space Shuttle ROMs) off eBay. After plugging in the new boards
I found that I still had the same problems. I tracked at least one problem
down to a short in the playfield (which in itself is weird, since one time
it worked, the next time it didn't, no real opportunity of fiddling with
anything to cause the short).
The game now plays fine as a system 11, but I have no audio (at all, no
background, no voice, nothing). The system 11 board came to me as "verified
working," but since I purchased it from another collector, I don't really
know the audio worked before it got to me. I can verify that the amp and
connection to the speakers is good, as increasing the volume pot lets me
"hear" the lights during attract mode (famous audio crosstalk problem of
system 11 and system 9 pins). The board being used is a system 11, revision
B (that is to say: A plain old System 11, not System 11A, B or C, but
System 11 with the 7 segment LED display, board revision B).
I think its conceivable I have a problem with the jumper settings. There is
something on the order of 15 jumpers on the board and I don't know what they
do as they don't appear to be documented anywhere. I'm thinking that I may
have to set something with these jumpers to get the proper ROM size. I also
identified another spot that looked like it may originally have been for DIP
switches, labeld in the silkscreen as DS-1 and DS-2. DS-1 has both
positions connected with a wire jumper, and DS-2 has no connections at all.
Anyone know what DS-1 and DS-2 do on a System 11 board?
Has anyone else upgraded a system 9 pin with a system 11 board and seen
similar problems with the sound?
Any help on this appreciated. I am probably very close to restoring full
functionality to my space shuttle game, but I'm a bit frustrated with the
audio debug right now... I hate to just start randomly desoldering and
replacing things like the audio op-amps if I have a simple setting
incorrect..
Thanks,
Scott