Space Invaders ? Like Atari, -do you have Asteroids as well. Now that's old. I think those came about shortly after electricity was invented. Tank and Pong- also in the mix lol.

How did you narrow it down to the transformer ?

 

By testing the individual legs with a VOHM.
The machine was built in 1979 I think.
It's an arcade console. It says 25Cents on the coin slot, but I rember them taking 50C.
I've seen them on Ebay (in better condition than mine) in the $800 price range. I remember when they were new they sold for about $1500.

 

Right, and as someone else alluded, if you're measuring a type of wave that has less than the 50% duty cycle of a "pure" square wave, as in a variable-speed motor controller that is varying the pulse width between 0% and 50%, only a true-RMS measurement circuit is going to give you accurate readings of the delivered power. A "garden-variety" meter will read either too high or too low, depending on the type of measurement circuit the meter was built with.

 

1979 ? Yea, then that's big enough for the bon-fire pit lol. I would have to follow the circuit, -figure out what the voltage is suppose to be on that particular rail first. Sometimes you can punch in the PCB # using google and locate the schematic. Yea, could be a bad transformer, it also could be other circuitry. Other than the transformer, look at the Mosfets, Diodes and Pico fuses as well.

 

The Diode Bridges Tumba. They should have markings like this -

+ ~ ~ -

Those can short on yuh..

 

Fluke has just published a paper Why true-rms discussing how non-linear loads need a true-rms current clamp for accurate readings. http://www.newark.com/pdfs/techartic.../whyTueRMS.pdf It also includes application notes. Also, here's the main Newark Fluke page www.newark.com/fluke.

 

Awesome.