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Twilight Zone Switch 73, Right Ramp, Switch 83, Left Magnet issue, Kahr US WPC Power Fix Board indicating 5V dropped below 4.6 V

W

wbk

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Location
Aargau
Hi
In Test mode I got the error Message
Check Switch 73 right ramp
Check Swith 83 left magnet
There both opto switches
I've got a Kahr US WPC Power Fix Board https://www.kahr.us/image/2017Pro.jpg, connected to J210
The red led is on which indicates according the Kahr us Manual: 5V dropped below 4.6 V
Could this be the issue - the side effect?
Is the power source for J210 the Power Driver Board connector J114 which connects to J210? And if yes how to fix this issue?
Any help is very appreciated.
Thank you
 
I’ve had two recent call outs due to the 5v fix boards not fixing the reboot issue.

I would just replace the rectifier, capacitor and regulator.
Put the game into switch test and check the switches. Could be a wire off or a faulty sender or receiver.
Also check the voltages at the opto sender and receiver.
 
Pick Holder said:
I’ve had two recent call outs due to the 5v fix boards not fixing the reboot issue.

I would just replace the rectifier, capacitor and regulator.
Put the game into switch test and check the switches. Could be a wire off or a faulty sender or receiver.
Also check the voltages at the opto sender and receiver.
Click to expand...
Hi Thank you for your answer
>I would just replace the rectifier, capacitor and regulator.
On the Kahr US board?
>Put the game into switch test and check the switches.
Both switches are open. The strange thing is, worked until yesterday, today suddenly two swichtes have issues? This would indicate to me rather not being a wire problem, would be a big coincidence two indipendent switches having wirining or faulty sender or receiver problem, or could I be wrong with this assumption?
Thank you
 
I did some further tests.
The cause must be at the plug connections under the playfield. I have unplugged another one and then plugged it back in. Now I have additional switch error messages.
The question now is how best to patch. Contact spray try? Or reassemble the connectors?
 
No, @Pick Holder is suggesting that you should actually fix the root cause of your FIRST problem - the obviously failing power supply.

All of your problems are very likely related to this and then (when fixed correctly) you wouldn't need to use the reset board either.
 
Homepin said:
No, @Pick Holder is suggesting that you should actually fix the root cause of your FIRST problem - the obviously failing power supply.

All of your problems are very likely related to this and then (when fixed correctly) you wouldn't need to use the reset board either.
Click to expand...
@Homepin Many thanks that was my first thought too
 
I have found a loose cable JS-10 White-Orange from J208-3 on the Custom Opto SW10 P.C.B. Assembly
A-16807 circuit board. How do I make this contact? Solder the cable together and then squeeze it in by hand, not at the soldering point. Or do I need a special tool for this?
 

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AlanJ said:
if you are careful you can also do it with a small flat screw driver. its not the recommended way, but it does work.
Click to expand...
Perfect, thank you. I'll try that. Will buy a tool then anyway, until the tool arrives I'll try with a small flat screwdriver
 
After I fixed the broken cable at the opto board, i get the very popular error message: Check F115, F116 Fuse, J112, Opto 12V. Now I have to start checking the power driver board. When I google this error I get several clues for possible causes, I will check them all now.
 
Issue is fixed, all fhe fuses were fine, and also all the power driver board test points measured with the correct voltage.
The issue was that the ground was not properly connected on the 10-Switch Opto PCB Assembly.
I also have to replace the burnt J120 connector. It's currently disconnected. On power-up there are no more error messages
Thank you all for your support, very appreciated!
 
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