Hi all! I’ve never actually run into a bad transformer before so I’m not yet sure what to think or if there is anything else I should be checking before calling it.

I have a game where I initially noticed some unusual voltages at the coils. In digging into it I found that at some point in the past the 5v died and one of those cheater regulators you plug in inline was put on instead of fixing the issue.

As I started measuring input voltages to the power diver board some were close to the manual, some were double the voltage and some were half.

So measuring unloaded I have the following voltages coming off the transformer:

I measured in the pin order listed here:
http://iobium.com/wpc_transformers.htm

While he didn’t specify measure this part number transformer I wouldn’t think it would be that far off.

Am I seeing this right as a bad transformer and if so, anyone have an idea of where to look for a replacement?

Edit: I haven’t checked yet but my next place to look is at the power box and the power select jumper plug... would a disconnected/broken wire there cause voltages like these potentially?

Ah, yeah I was measuring from a common ground. That makes sense then thanks! Yeah transformers almost never fail (haven’t encountered one in 25 years) so I have never even bother testing one before. Figured someone here would know better than me, thanks!

Ok, properly measured this time around. There is one winding that still seems off.

Coming into the power board J102 is where I’m seeing the bad voltage (haven’t measured all yet but this is the area I am having issues in (coils/lamps on the output J107)

Anyway, the white-red winding input in J102 measures 16vac spot on. However, the black-yellow winding is also supposed to be 16v but I am measuring 53vac there which is (I believe) pushing the DC output on 107 way past the 50vdc to over 110vdc.

So... considering that I am not getting the proper voltage from one winding (over 50v instead of 16) and two references saying it should be around 16 (manual and iobium), would it be safe to share the good 16vac to both inputs of J102 in parallel or would I be risking overloading that winding? One supplies rectifier for flashlamps while the the other supplies rectifier for low power and general purpose solonoid’s.

Ok as long as I’m ranting to myself here... i found on Pinwiki the power summary schematic which actually shows exactly what I am measuring for inputs, yay! So hopefully that means the manual is wrong which would be great because now its back to being a board issue which I can handle yay.