Can someone identify this?

[73buick]

I believe this is a variable resistor/potentiometer. The only marking is the 10K on top, and then the marking on the wheel, which I assume is the manufacture logo. I took a logical guess that it was a 10 kilo-ohm potentiometer and ordered this from digikey

http://www.digikey.com/product-detai...3352W-103LF-ND

It is much smaller, like half the size, of the original.

Real quick to the scenario, trying to fix a tatoo machine. It should have a starting DCV of 0, but it starts at like 4-5V. When I checked this part, out of the circuit board, the high reading was spot on around 10kOhm, but the low reading was around 12-15 ohms. I tested the new one I got from digikey to compare, its low is about .2-.3 ohms. But without knowing exactly what the original part brand/model is, I don't know if that is within spec or not.

[stj]

Re: Can someone identify this?

10k carbon preset.
the bit you turn pulls off - they sell that seperatly.

i cant say anything else, i dont know the pin spacing.
fix your profile so we know what country your in - it helps when recomending sources of parts.

[budm]

Re: Can someone identify this?

"but the low reading was around 12-15 ohms." That is no going to be the cause of the problem 12~15 Ohms is very small percentage of 10K.
Upload good clear pictures of the board top and bottom side and tell us what it is not doing.

[73buick]

Re: Can someone identify this?

Okay, here are some more detailed pics. When this thing is turned on and the front rheostat is turned all the way ccw, it should be reading 0V but it shoots up to 4v-5v at the start, which is more than what the max should be for the tattoo needle (according the the client). I replaced the rheostat, no change. Since the parts were cheap, I ordered the chip, the transistors and what I thought might be an equivalent to the carbon preset? I swapped the chip (no change), but haven't done anything else.

[budm]

Re: Can someone identify this?

"it should be reading 0V but it shoots up to 4v-5v at the start" At the wiper of the front reostat or at the output to feed the actuator?
What is the IC # XX723, xxx556?
it looks like the Big transistor on the heatsink is the one the feed the actuator and driven by the IC on the board.
So you changed the IC but not the transistor?

[stj]

Re: Can someone identify this?

check if the transistor on that big heatsink at the back is not shorted.

[ben7]

Re: Can someone identify this?

You sure it used to start up at 0V? Sounds to me like the pulse is caused by a capacitor in a signal path, which is momentarily charging up when power is first applied. That's just a guess though.

-Ben

[eccerr0r]

Re: Can someone identify this?

That is an LM723 linear regulator with external pass transistor...

Agreed, should also check the external pass transistor. Also check R2 - fusible resistor? This should have a fairly low resistance in the fractions of an ohm... Unfortunately I cant tell the colors, looks like orange-white-silver-gold (0.39 ohm 5%) but that would be a guess.

[Duncanbest]

Re: Can someone identify this?

acp CA9 CA14 RS14 .....

https://cdn.badcaps-static.com/pdfs/...7d79f7f5e5.pdf