Transformer type identification help

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I recently pulled a transformer from an old RadioShack Optimus series 4 channel stereo mixer. (similar to the SSM-1750)

I have limited experience with transformers, and was hoping someone could help me try and identify the different windings before I go off and experiment with a multimeter..

The label on the top says:

Built-in Thermal Fuse

A quick google search turns up nothing.

The primary winding is easily identified by the thick wires. On the other side, there are 7 wires:

1 black
2 grey
2 white
2 green

Here is a picture
An externally hosted image should be here but it was not working when we last tested it.

Ill take a guess, and say that there are three secondary windings, one of them being center-tapped?

If I end up using my multimeter to test the secondary wires, is there any danger if I accidentally measure the voltage of two wires from different windings?

Definitely test resistance first.
You have someone here willing to help. take it.

I have dimmed the lights, with smoke coming from a transformer by trusting the wire colors and thickness. That educated guess could've ended in disaster for everyone around me.

Electrical components inside commercial electronics can be extremely deceptive...such as transformer for a CD player. 120V primary - 40V for one secondary and 8V @ 6amps coming from another secondary. Nothing unusual...other than it was all being run through thin 24guage ribbon wiring. I would have never suspected that type of available amperage looking at the gauge of the wires...

I don't mean to discourage you or anyone from learning and saving some $$$ in the process. In fact I encourage you to continue posting to help learn the proper methods

A light bulb dimmer test for testing amps and transformers is a life saver. I picked up the parts for around $6 at a local hardware store...pennies compared to equipment it could save...and priceless compared to the physical harm / life it could save.
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