Please help identify part (quick and crash)

Clayton11

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The manual calls it the "Xenon Drive PC Board". The board itself says "XE DRV PCB".

It looks like Tamura manufactured it for Namco. P/N DNP0617C.

So the part I need to replace I thought might be a capacitor, but isn't actually a capacitor. Capacitors are usually labels something like C5, but this is labeled NR1. Also, the symbol underneath it isn't the symbol for a capacitor. I can't figure out what it is, even after spending some time Googling it.

If someone could please help me identify it, that would be so much help so I can get my unit fixed and continue playing :)
 

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Re:

If someone has a picture of the same board with the part not burnt, that may help identify what I need. Any indicator markings or writing on it if there are any..
 
That's probably a MOV. (voltage clamping device)
Check it is in parallel with J201.
What voltage is typically applied to J201?
 
Yes. It's in parallel with J201 and REC1. I don't however have the ability currently to test the voltage
 
That is a MOV, as a "quick and Dirty" test you can remove that part and test the rest of the circuit without it.
What that part does is it acts like a one time over voltage fuse. and when they blow they " usually" short out. This will cause the fuse or breaker upstream to blow.
 
That's exactly what happens. Trips a fuse every time. Thank you so much for your advice. Do you know where to pick up a MOV?
 
MOVs vary in size and capacity. That is why I asked what voltage is being applied on the connector. Is it 120VAC?

The MOV likely died since you had a transient surge event. There is a possibility that other components in the circuit are "dead" ... including the bridge rectifier (which, if a diode is bad inside, will also open the fuse).

Remove the MOV. Diode test the rectifier.
 
If the part is across the power connections it's a MOV... If it's inline with one of the power leads then it's a resistor (thermistor) that changes values either up or down as it heats up.

That's common to find on circuits to limit inrush current when a power supply is first turned on.
 
If the part is across the power connections it's a MOV... If it's inline with one of the power leads then it's a resistor (thermistor) that changes values either up or down as it heats up.

That's common to find on circuits to limit inrush current when a power supply is first turned on.

I am just guessing here, but with the placement of this part I would have to say it is across the power lines because it is directly in between the power IN and the 2 center pins on the Bridge Rectifier. So MOV would be the proper term.
 
Well, I thought the uncommon practice was for MOVs to be labeled, in many ways, but one would be with "VRx" where it is denoting a voltage dependent resistance (or variable resistance based on voltage).

And "NRx" to note a negative resistance which is more commonly related to a negative-temperature coefficient Thermistor (where impedance decreases with current/temperature).

To know for sure, the OP needs to review the traces in the PCB and determine if it either in series or in parallel with the connector - to - bridge connections.

In both cases, the circuit could be deploying either method for protection.
 
Forgive me for "necro-ing" this thread, but that's the *exact* part I'm trying to replace on my Quick and Crash. Information on it is virtually non-existent. See my thread here:

https://forums.arcade-museum.com/showthread.php?t=446537

Was this ever resolved? Can anyone advise me on how to determine what type of MOV to order to replace this part? My electronics knowledge is limited, but I'll do whatever I can to get this figured out.

Thanks in advance!
 
As mentioned in older posts - it is difficult to determine if this is a MOV or a current inrush limiter (negative temp coefficient thermistor). Original poster did not provide enough information -- exactly how is this connected? Directly across the incoming power (MOV) or between the incoming power and the bridge rectifier input (NTC).
Maybe it would help if you post a pix of bottom of board?

The wishy washy response about connections: "I am just guessing here, but with the placement of this part I would have to say it is across the power lines because it is directly in between the power IN and the 2 center pins on the Bridge Rectifier." doesn't clarify much. This is one of those cases where a picture of connections would be worth a thousand words...
 
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