Recent content by ironmike

Riptor - When you say "all the pins", is that just the edge header pins (the ones on my board with the orange stuff) or all the solder points throughout the entire board? (Probably take me longer than 15 minutes but no worries).

I checked the filter board again under a lighted magnifying lamp and again found no solder cracks. I did see some discoloration on the pin solder points that has an orangy color to it. See the pic. Don't think that is a concern, is it? Let's assume then that the filter board is working ok...

Pulled the filter board tonight and did a visual check. I didn't see any cracked solder joints. Checked the resistance across all pins, top to bottom and all checked A-ok. Would a cracked solder joint be obvious to the eye?

Nope. That's next. I would guess that since you suggest checking the filter board that it sits between the PS and the PCB? And a cracked solder joint on it could result in the loss/drop of power to the PCB? Thanks again all so far for the replies and help! Mike.

Here are my voltage test results: On PS: Off P3: 5.2V (pins 9-15) Off P4: Pin 1: 8.6V Pin 3: -11.6V Pin 4: 11.8V Pin 6: 26.8V (24V zener mod) Pin 7: 5.2V On PCB: Across C27: 4.1V Across C26: .03V The schematic sez P4 Pin 1 should be 20V. Is 8.6V too low? It's the coin meter...

That's what I did last night but I was getting odd readings. I attached the black lead of the DMM on the ground strap on the cab and measured the pins on the top connection of the PS board with the red lead using DC V on the DMM. The readings would drop steadily as I kept the red lead on the...

To perform these voltage tests do I isolate the PS board from the PCB and sound board by removing the connectors? Or do I just leave everything connected? Thanks, Mike.

Thanks, Jon Hopefully, I can find time this week to run some voltage checks. I'll report back with my results. Mike.

Hi, everyone. Just joined this forum to seek help with my dedicated Q*Bert upright. It was working awhile back but now its on the fritz. I get the "I'm turned on" when I power it up but then the knocker goes haywire and knocks repeatedly. The screen is all garbage, no pyramid, no start...