Tech: Robotron

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Hey all,
I turned my Robotron on today to play a few games it played for 5 min and
got a rug pattern I immediately turned it off opened the coin door and
turned it back on to see if I got a error message and the +5vdc/+12vdc
unregulated fuse (FS7) was glowing red.......Any ideas?

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Get a meter and check your voltages first - make sure everything is in spec.
Does it have a switcher or is it a factory power supply?

Thomas

"John Hacker" <TMC@wi.rr.com> wrote in message
news😀dbbe.31857$215.28380@tornado.rdc-kc.rr.com...
> Hey all,
> I turned my Robotron on today to play a few games it played for 5 min and
> got a rug pattern I immediately turned it off opened the coin door and
> turned it back on to see if I got a error message and the +5vdc/+12vdc
> unregulated fuse (FS7) was glowing red.......Any ideas?
>

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

Ok still looking for help. I have been replacing fuses to try to track down
the problem still no luck. All the the chips on the board stay cool to the
touch. Fuse F-7 (+12 unreg +5vdc) after 5 min will burn the hell out of your
finger and will blow about 5 min after that.This has a ram upgrade on this
if that helps. What would you check next???????


"John Hacker" <TMC@wi.rr.com> wrote in message
news😀dbbe.31857$215.28380@tornado.rdc-kc.rr.com...
> Hey all,
> I turned my Robotron on today to play a few games it played for 5 min and
> got a rug pattern I immediately turned it off opened the coin door and
> turned it back on to see if I got a error message and the +5vdc/+12vdc
> unregulated fuse (FS7) was glowing red.......Any ideas?
>

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

It has a factory PS and all voltages are good.

"Docrotcod" <rahbart@cox.net> wrote in message
news:9Dgbe.7436$qb4.5885@okepread03...
> Get a meter and check your voltages first - make sure everything is in
> spec. Does it have a switcher or is it a factory power supply?
>
> Thomas
>
> "John Hacker" <TMC@wi.rr.com> wrote in message
> news😀dbbe.31857$215.28380@tornado.rdc-kc.rr.com...
>> Hey all,
>> I turned my Robotron on today to play a few games it played for 5 min and
>> got a rug pattern I immediately turned it off opened the coin door and
>> turned it back on to see if I got a error message and the +5vdc/+12vdc
>> unregulated fuse (FS7) was glowing red.......Any ideas?
>>
>
>

 

[Guest]

Archived from groups: rec.games.video.arcade.collecting (More info?)

what's the +12 unreg go to (lights?) (sorry don't have the schematics
handy.. they're in the garage and I'm still in my jammies)?

I'd check to see that it's not shorting out threw something...

turn it off and see what the resistance to ground is (take the fuse out
first).

steve

"John Hacker" <TMC@wi.rr.com> wrote in message
news:Rzgbe.34770$PA4.31570@tornado.rdc-kc.rr.com...
> Ok still looking for help. I have been replacing fuses to try to track
> down the problem still no luck. All the the chips on the board stay cool
> to the touch. Fuse F-7 (+12 unreg +5vdc) after 5 min will burn the hell
> out of your finger and will blow about 5 min after that.This has a ram
> upgrade on this if that helps. What would you check next???????
>
>
> "John Hacker" <TMC@wi.rr.com> wrote in message
> news😀dbbe.31857$215.28380@tornado.rdc-kc.rr.com...
>> Hey all,
>> I turned my Robotron on today to play a few games it played for 5 min and
>> got a rug pattern I immediately turned it off opened the coin door and
>> turned it back on to see if I got a error message and the +5vdc/+12vdc
>> unregulated fuse (FS7) was glowing red.......Any ideas?
>>
>
>