Re: Xenon controlled lamps (lots of detail to mull over)
- From: "Ray Johnson - Action Pinball" <staff@xxxxxxxxxxxxxxxxx>
- Date: Thu, 18 Aug 2005 15:33:39 -0600
Any chance you've got a cable connector plugged in wrong somewhere? Or not
plugged in? Check all cables and connectors in them, and connectors at each
board. Any cables/wires look like they've been mashed or crushed in backbox
door or under the backbox/hinge, etc?
Have you compared the non-working lamps to the schematics of the lamp board
in the game manual to see what component(s) on the board might be associated
with the non-working lamps? IE: look for common parts that they share to
try and narrow it down.
You may want to pull both switch connectors off the MPU board (both right
side connectors) and then boot up and see if things change. It may be that
you've got a grounded switch column or row wire- I've had grounded switch
lines in these games do some ~weird~ stuff. This would at least eliminate
the switch lines as being possible culprits.
Maybe even disconnect the coin door wiring harness connector (just inside
left of coin door) in case a short on the door is causing problems (lot of
metal on that door).
Maybe check the wires in each of the connectors between MPU J4 and lamp
driver top left connector (J1?) to make sure each one is in the right place
in the connectors. I had a Flight 2000 once that wouldn't boot or speak and
someone had moved 1 wire 1 position over in the J4 connector and that
wreaked all the havoc of a 3-day hair-pulling repair job....
Wow- weird.
Ray J.
--
Action Pinball & Amusement, LLC
Salt Lake City, Utah USA
Web: www.actionpinball.com
We're serious about pinball. Anything else is just for fun!
"Kansas Pinball" <cyberolds1@xxxxxxxxxxx> wrote in message
news:1124399016.456488.103510@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Ok, have a Xenon. Some of the controlled lamps work, a bunch don't.
> Here is what I have tried with no affect.
>
> Changed all bulbs with known good ones
> Burned new ROMs
> swapped mpu from my Space Invaders
> swapped light driver from my Space Invaders
> swapped solenoid driver (just for grins)
> checked all boards had ground to the braid and cabinet
> grounded each lamp (worked)
> triggered SCR manually (worked)
> Re-built both connectors associated w/BCD signals (mpu/driver bd)
> checked every single wire color and they are correct
> swapped in another MPU and another lamp driver (Paragon)
> Voltage at the sockets (worked when I grounded them)
> TP's on power board check out (some are working so we know its ok)
>
> What can it be? I keep thinking that signal is not getting to the lamp
> driver but I ohmed every single wire from the MPU to the lamp driver
> and all are making contact.
>
> Just for the record, this machine will not coin up, start a game or
> play any sounds. Boots fine and goes into attract mode.
>
> I measured from ground on the lamp driver to the braid on A/C and had a
> strange reading. Thought maybe my ground reference was messed up. Put
> an aligator clip from the braid right to the GND testpoint on lamp
> driver. Lights were brighter but the ones that didn't work still stayed
> dark.
>
> Man, this one is the first to really stump me. As you can see, I tried
> a lot before posting. Any ideas?
>
> Doug
>
.
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