Elevator Action Help?

MIKE96

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I was putting back together a EA on Sunday. Turned it on, marquee lights up and white screen only on the monitor, has a switcher installed. So I changed the pcb with another working one, same results, changed switcher same results, finally changed monitor same results. White screen, no coin up and can't hear any game play. I do hear a very light hum in the speaker. The only thing I haven't tried changing is the filter board. any help?
thanks
 
did you test any voltages along the way?

Sounds like a power supply problem (in the sense that it isn't getting what it needs, voltage wise).
 
when you say a switcher is installed, are you using one of the arcadeshop taito p/s pcbs along with your switcher or has the harness been spliced into the switcher?

i bought a non-working frontline that had a spliced in ps, i repaired the splices an installed an arcadeshop ps kit and it worked perfectly - i was lucky the original connecters were still inside the cabinet
 
Check your power supply voltages.
If they are good, trace the wires back, and test your power supply at the PC board connections. If there is a significant voltage drop (more than 0.2 or 0.4 volts), start looking for a connector and clean it up / replace it. Stuff corrodes, and when it does, it doesn't work anymore.

If all that turns up clean, look for any socketed chips on the main PC board, and carefully remove them and clean up their legs, and then reinstall them in the correct orientation.

If that doesn't do it, replace the electrolytic capacitors on the board.

If this looks like a foreign language to you (e.g., you aren't handy, and don't know how to use a volt/ohm meter), find a local tech, and pay them to troubleshoot this game.
 
Do you hear the coin mech (magnet/coil?) turn on when you switch on the game? If you don't hear the magnets click on, then you have a voltage issue.

Two biggest problem areas on all classic taitos:

1. Interconnect pcb- reflow every single header pin on this sucker
2. The header pin connector that's plugged into the pcb. This connector takes the bulk of the voltage for the game. Cut it off, and replace the pins and connector..

I'd bet its the interconnect.. Hell, might even have some worn out pins in the many connectors that attach to the interconnect.. I've had the same issue with frontline, jungle king, EA, and others.. Trick is, listen for the coin door magnets to power on.. Then go nuts testing voltages.
 
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