Popeye PCB

Popeye82

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My voltage readings on my PCB are reading 10V which is double what they should be. Where is the first place I need to look to correct this?

Thanks.
 
If they really are 10v then the board will be utterly wrecked, however it is more likely that you are measuring between +5v and -5v. You need to measure between +5v and ground.
 
I received the following instructions from a guy on the forum: "Start by checking the power. Look at the edge connector. One side of the connector has some notches in it that line up with keys in the connector (to prevent plugging it in the wrong way around). On that end of the connector, the first two pins on each side of the board are ground, and the next two pins on both sides of the board are 5V. Check there, and see what you get. You want it to be right at around 5v, give or take a fuzz."

So I placed my black lead on one of the far right pins and placed the other on one of the next two pins on the front then the back. My Popeye manual backs this up. I measured 10 volts on each of the four pins (2 on one side, 2 on the other). Am I doing something wrong? or is there maybe a power source/transformer issue?

Thanks.
 
I would unplug the boardset until you are clear whether there is a power issue or not (+10v on the +5v is a HUGE issue)!

So unplug the boardset, turn on the power and measure the voltages at the power supply. Let us know how they measure.
 
measurementfrom power supply

I am measuring 10 at the power supply. I'm measuring 50V for the coin counter. I believe it is supposed to be 24V. Thanks.
 
ok, i just removed the 9 pin and the 10 pin connectors from the output of the PP-900A power supply. They measured correctly. It's when i reconnect them to the molex cable going to the 22 pin connector that goes into the board that I get readings that are twice as high as they should be. Any ideas?
 
I have no idea why your voltages double when you plug in those connecters. Maybe someone local or with a Popeye would have more insight.
 
voltage readings?

Anyone have any idea about my voltage problem. I am about ready to plug in my board and hope for the best...........
 
Anyone have any idea about my voltage problem. I am about ready to plug in my board and hope for the best...........

Dont, you will kill the board utterly, every single chip will blow if the 10V is real.
 
I know. I need step by step instructions on testing the connector that plugs into the 031-FCC PCB which is on the the shield cover.
 
I'd take a good look at page 19 of your manual (page 19 in pdf, but numbered page 16 in a real manual). Verify that the connectors coming from the p900 power supply and wire colors match what in listed on that page. If that got flipped, or someone rewired it wrong, you might be sending an extra 5V to a ground line on the Board. You may actually be supplying 10V to the system.

This might be one of those fun ones that has more than one problem - enjoy!

For starters, disconnect all connectors from your power supply (other than AC in....) and verify that each +5V on the PS is good. I.E. 9P connector - put black lead of multimeter in pin one, and touch each of pins 5, 6, 7, and 8 with the red lead of the multimeter. Verify 5V. Lastly, check 24V by putting black lead in one of the GND pins, and red lead on +24V.

Now, Turn your game OFF!! Test continuity between all ground pins on that connector -i.e. put black lead on pin one, red lead on pin 2, verify continuity. Repeat for pins 3 and 4. Test continuity between +5 pins and GND pins on that same connector - you shouldn't have any.

Now, do the same procedures for the 12P connector. Power on to test voltages, power off to test continuity.

Once you verify your power supply, it is out of the equation.

Then, if it is good, you probably have a short. Turn off your game!!!!!! Then, plug in your board but Don't power it up!!!! Test one of the chips on the board. Find a 74lsxxx chip and test continuity between Vcc and GND for that chip. If you have continuity, then you have a short on your board .... somewhere.....most likely (small value resistors can make a board appear shorted when they really aren't, but generally, you shouldn't have continuity between +5 and GND on a single chip).

With so many 5V supplies to this board, I can easily see a shorted component leaking an extra 5V into the system. Shorts are hard to find... not only that, but finding the short is only the start - you may have many shorts. You need to figure out what component caused all the others to short. And, you need to find all the shorted components and replace them, or you might end up right back where you started.
 
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