TECH: Gorgar White Push Button Door Switch Short
- From: "Michael Belofsky" <mbelofsky@xxxxxxxxxxxx>
- Date: Wed, 30 Nov 2005 21:23:27 -0500
I first want to thank Joe and Dennis at Coin Service Technology for their
help.
I bought a non-working Gorgar. I sent the boards to Coin Service and they
repaired them. I tested all the coils and put the boards back in the
machine.
With the playfield up, the machine turned on and worked. I replaced some
lights. I turned off the machine and put down the playfield and shut the
coin door and turned on the machine. The GI came on. The scores showed 00
for 2 seconds, then the game did nothing else.
I tracked down the problem to the white push button at the top left of the
coin door. With the door open, the game works. With the door closed, it does
not work.
I removed the second connector at the top left of the MPU board. There are
two 4 pin connectors. The left most has one wire which Joe tells me is the
blanking circuit. The next 4 pin connector has the wires from the push
button in the door to test and the white door switch. Joe told me that pin 1
is the memory protect; pin 2 is ground; pin 3 is the advance button and pin
4 is the auto up/manual down switch wire. Pin 1 has a black wire with purple
strand that leads to the white switch in the door. Pin 2 is the solid white
ground wire that connects to the white switch in the door and daisy chains
into the test button assembly.
When the door is closed the game lights turn off and the displays turn off.
The machine stops responding until you turn off and on the game with door
open. I temporarily removed the 4 pin connector and the game works with the
door closed.
My problem is I am not sure what to look for. Could the box the white button
is connected to be bad? Could the wires be shorting? I tested continuity
from the black/violet wire near the door to pin 1 on the connector and it
has connectivity. I also tested the ground wire from thedoor button to pin 2
and it has connectivity. When I press the white button there is connectivity
between pin 1 and pin 2. If I can't simply replace the white button
assembly, I am not sure what to do.
Thanks for your help.
Michael
.
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