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View Ben's profile

Help troubleshooting Hitachi Chop Saw

by Ben
posted 11-26-2016 12:12 AM


9 replies so far

View Loren's profile

Loren

10477 posts in 3796 days


#1 posted 11-26-2016 12:21 AM

That’s a transformer I think. You have a 6v motor.

I don’t know if that could be the culprit.

I recommend you ask on a site like Practical Machinest.

View TheDane's profile

TheDane

5525 posts in 3812 days


#2 posted 11-26-2016 12:31 AM

That is, in fact, a transformer … it is the power supply for the saw’s laser. Have you checked the brushes?

-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View dhazelton's profile

dhazelton

2789 posts in 2445 days


#3 posted 11-26-2016 12:35 AM

Can you take the transformer out of the unit and see if you have continuity between the black on the input side and red on the output side?

In the future test the switch before you replace it. Turn it to ON, put a meter on the OHMS/resistance scale and see if the needle on your meter moves when you touch the input wire with one lead and the output with the other.

View SignWave's profile

SignWave

451 posts in 3184 days


#4 posted 11-26-2016 12:43 AM

I’m with TheDane. Check the brushes.

Wouldn’t hurt to vacuum out the dust… :)

-- Barry, http://BarrysWorkshop.com/

View Ben's profile

Ben

386 posts in 3006 days


#5 posted 11-26-2016 12:45 AM

Thanks guys.
I just popped in the new brushes. I had ordered those thinking they had something to do with the brake, which had long ago stopped working.

The old ones were worn down half of the new ones.

In any case, still not powering on.

View dhazelton's profile

dhazelton

2789 posts in 2445 days


#6 posted 11-26-2016 01:13 PM

Dumb question – you have power at your outlet? Does the laser work (or does it only power up with the motor)?

View Ben's profile

Ben

386 posts in 3006 days


#7 posted 11-26-2016 02:05 PM

Thanks dhazelton.
Yes, power at the outlet.
The laser hasn’t worked in years… Or maybe the glass is just so covered up with sawdust that I can’t see it.

View wichman3's profile

wichman3

73 posts in 770 days


#8 posted 11-26-2016 02:18 PM

Have you checked the commutator ?
You may have access though the hole where the brushes go, if the commutator is dirty you can clean it with an eraser. Don’t use sandpaper or emery cloth, they’re too aggressive.

View dhazelton's profile

dhazelton

2789 posts in 2445 days


#9 posted 11-27-2016 01:51 PM

I had a Craftsman electric chainsaw made by Remington that wouldn’t power up. I replaced the switch (before I understood how to use a meter to test things) and still dead. Pulled the whole thing apart and there are two wires that go to the motor, thin and uninsulated, and one was broken. I put a blob of solder there and it worked again.

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