Defender Coin-up Problem

[smac666]

Hi,

Well finally after a year of work (plus a few other side projects) I managed to get my defender cabinet finished. I'll take some before and after pics and post them later. So got it into the basement, plugged it in and away it went, Initial Tests OK and went to attract mode. Now I'm ready to show my totally unawesome ability at the game. Dropped a quarter in, nothing. Open the coin door and flip the microswitch, nothing. Not good, Worked fine on the bench two days ago but now nothing. Arrgh.
Checked the cable was connected and that the door was attached to the ground.
Tried the manual and advance buttons and nothing seemed to happen there also.

Anyone got any ideas as I never got a chance to really mess around with it last night.

For you info, I've changed it to a switcher PS and I changed the coin door lights and rewired them to the switcher +5v supply. The only other thing I did was change it to the 4164 RAM for reliability.

Regards
Steve
 
 

[RetroACTIVE]

When you say the coin door is attached to the ground... what do you mean?  Are you talking about the ground braid? or the actual harness connection from the power supply board to the coin door?

Do you have a switching power supply or the original?  The reason I ask is the coin switches get their ground from the power supply connection ... not from the ROM board connection... so if you don't connect that (PSU) harness you will have no ground lead to the coin door.

 

[smac666]

Yip I have changed it to a Switcher and I checked the continuity to the grounding braid.

Ok so if I understand what you are saying then I should run a wire from the ground on my switcher to the coin door.

Regards
Steve

[RetroACTIVE]

Yip I have changed it to a Switcher and I checked the continuity to the grounding braid.

Ok so if I understand what you are saying then I should run a wire from the ground on my switcher to the coin door.

Regards
Steve

Yes you are correct... I believe its pin 6 and pin 13 of the 15 pin molex coin door connector which are the ground leads to the coin door switches... if you get a ground to these pins you should be good to go...

Just double check... I'm not sure off the top of my head if its pin 6 and 13... but its easy enough to tell...

[smac666]

Thanks.
I'll try it tonight.

Steve

[smac666]

You were right, found the line in question and connected it to the ground on my switcher and bingo away it went.

Thanks for all the help.

Oh I still totally suck at the game and got owned.
I'm sure i was eaiser 20  years ago

Steve

[RetroACTIVE]

You were right, found the line in question and connected it to the ground on my switcher and bingo away it went.

Thanks for all the help.

Oh I still totally suck at the game and got owned.
I'm sure i was eaiser 20  years ago

Steve

Don't you just love the simple fixes?
...and glad your getting spanked by Defender... it was just as difficult 20 years ago!