G
Guest
Guest
Archived from groups: rec.games.video.arcade.collecting (More info?)
I have a Q*Bert with the original power supply and a switching power
supply that was working when I got it.
One time I plugged it in, heard the knocker, and nothing. Now when its
plugged in it gets nothing.
I have been checking voltages all over the place, and am getting the
expected AC voltages on the safety switches and the cable assembly going
into the bottom panel assembly (power brick).
No voltage is getting to the monitor or the switching power supply.
I am getting voltage on the service outlet on the bottom panel assembly.
Since I have a switching power supply and no power getting to it, the
various boards are not getting any of the power that would be coming
from that power supply. I have tested that power supply outside of the
q*bert game and it is working.
I have replaced all of the fuses on the power brick except the 2 amp and
the 4 amp which I will try later today. This had no effect and none
of them seemed burned out anyway, however I did notice that the fuse at
location F4 which should have been a 10 amp fuse was actually a 30 amp
fuse (big thanks to whomever did that!) I've replaced it with the 10
amp fuse, clearly one "power-on" too late.
I had posted this problem before and got suggestions about the
power-supply board. I've done some checking of parts on there and did
find a bad transisor and zener diode, and replaced those parts. However
no power is getting there at all still, so I think there is a problem
prior to that which must be addressed. Maybe something wrong with the
power brick in the bottom of the machine...
Any ideas on where (on the machine only, please!) I should stick my
multimeter probes looking for problems, and what I should be looking
for? What's involved in testing one of these outside of a machine and
rebuilding it? Any techs in the phoenix area who might be able to look
at this (paid of course)?
Thanks for any help,
Shawn
I have a Q*Bert with the original power supply and a switching power
supply that was working when I got it.
One time I plugged it in, heard the knocker, and nothing. Now when its
plugged in it gets nothing.
I have been checking voltages all over the place, and am getting the
expected AC voltages on the safety switches and the cable assembly going
into the bottom panel assembly (power brick).
No voltage is getting to the monitor or the switching power supply.
I am getting voltage on the service outlet on the bottom panel assembly.
Since I have a switching power supply and no power getting to it, the
various boards are not getting any of the power that would be coming
from that power supply. I have tested that power supply outside of the
q*bert game and it is working.
I have replaced all of the fuses on the power brick except the 2 amp and
the 4 amp which I will try later today. This had no effect and none
of them seemed burned out anyway, however I did notice that the fuse at
location F4 which should have been a 10 amp fuse was actually a 30 amp
fuse (big thanks to whomever did that!) I've replaced it with the 10
amp fuse, clearly one "power-on" too late.
I had posted this problem before and got suggestions about the
power-supply board. I've done some checking of parts on there and did
find a bad transisor and zener diode, and replaced those parts. However
no power is getting there at all still, so I think there is a problem
prior to that which must be addressed. Maybe something wrong with the
power brick in the bottom of the machine...
Any ideas on where (on the machine only, please!) I should stick my
multimeter probes looking for problems, and what I should be looking
for? What's involved in testing one of these outside of a machine and
rebuilding it? Any techs in the phoenix area who might be able to look
at this (paid of course)?
Thanks for any help,
Shawn