Bethany Beach, DE
Just picked this up. Power on looks like most the LEDS on the driver board are lit except no 5v led. No display, no lights. I checked F113 with DMM tone and it is good. Any troubleshooting steps to start?
thx
(Topic ID: 219634)
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Quoted from zacaj:Measure the AC voltage between pins 1+2 of J101. If you've got voltage there, then there's a problem in the rectifier or regulator, otherwise you've got a connector or transformer issue
looks like about 1v ac on those 2 pins
Quoted from Pin_Guy:Follow these connections back to the transformer...red wires as shown:
thx pin guy....I get 1v a/c at the connector on J101 pins 1 and 2. I see the cube molex with red wires. I reseated a couple times...guess I could try and get my leads in there on red wires to try and see if I get 9v?
No idea what could go wrong in there. I have never had to look at the transformer 
Quoted from billsfanmd:No idea what could go wrong in there. I have never had to look at the transformer
Me either, my best guess is it's a connection issue. Just make sure your meter is on AC volts and check the red wires for ~9VAC
FYI...if you suspect the small HV interlock cable as being problematic, you can always connect the connectors labeled as A and D in the picture above together, this will remove the interlock cable (if equipped) from the equations...on the downside, this also bypasses your coin door safety interlocks.
Quoted from Pin_Guy:Me either, my best guess is it's a connection issue. Just make sure your meter is on AC volts and check the red wires for ~9VAC
FYI...if you suspect the small HV interlock cable as being problematic, you can always connect the connectors labeled as A and D in the picture above together, this will remove the interlock cable (if equipped) from the equations...on the downside, this also bypasses your coin door safety interlocks.
not sure what you mean by connecting a and d....your not saying unhook and put and and d together?....figured they would not even seat. I doubt its interlock
ok. i actually removed conn at j 101 and leads in female end of 1 and 2. 9.9v a/c.
so now i move to the board to check. any ideas ?
Quoted from billsfanmd:not sure what you mean by connecting a and d....your not saying unhook and put and and d together?....figured they would not even seat. I doubt its interlock
I am, in the picture of the transformer, connectors A and D should fit together perfectly. The cable with the B and C markings is the coin door interlock cable that breaks connection to the transformer secondaries used to generate you +20V DC and +50V DC on the power driver board. This interlock cable was added as a safety device to eliminate playfield high voltage when the coin door is open, it is not required for the functionality of the game.
I'm 100% sure it's not the interlock, the above procedure does nothing but remove 2 connection points from the equation.
Quoted from billsfanmd:ok. i actually removed conn at j 101 and leads in female end of 1 and 2. 9.9v a/c.
so now i move to the board to check. any ideas ?
Your problem is on the PDB. Most likely failure is F113, BR2 (+5V rectifier), or Q1 (+5v regulator) ... in that order. You need to measure your DC voltage at the output of BR2 or input of Q1 (yellow path). Unfortunately, I have no pictures of your point-of-test for this measurement.
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Quoted from billsfanmd:i know it’s a shot gun approach. but can i just replace those components ?
Its your machine, you can do whatever you want
Before I did any board work, I would pull out out F113 and verify it with a meter...just to be sure.
Quoted from Pin_Guy:Its your machine, you can do whatever you want
Before I did any board work, I would pull out out F113 and verify it with a meter...just to be sure.
I did pull out and tone....yeah..Ill reflow fuse holder and the j101 pins too first
Quoted from Pin_Guy:Follow these connections back to the transformer...red wires as show:
Awesome pair of pictures Pin_Guy
Quoted from Schwaggs:Awesome pair of pictures pin_guy
yep. great detail. very helpful!
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