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Power is cuts out

I have power to the pedal and the power is cuts in and out like there is a short from the pedal to the motor

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Check the wire where it comes out of the pedal. Also, all internal connections.

Posted on Jul 31, 2009

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My Bernina "Record" of 1972 suddenly stitches away without foot pedal command, infact same with pedal unplugged Only way to stop is cut AC power


Something with in your machine seems to be shorting out. Since it is many years old I suspect you have wires that the insuation is rotten and making a short. I have seen this before. Should get it repaired if it's worth it. You could be shocked or hurt.

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Stairmaster pedal resistance electrical problem


How To Clean Commutator Using Commutator Stone
Did you use a commutator stone when installing the new brushes? A commutator stone is used to remove carbon build up from the commutator of a motor or alternator, which is created from worn brushes. The commutator is the internal part of the motor or alternator that spins and makes contact with the motor or alternator brush.
BE ADVISED: The dust created from cleaning the commutator is a carbon dust. Use caution when removing dust so as not to inhale.
If servicing the motor or alternator without removing from the unit, be sure to disconnect power from the machine.
To remove the carbon build up from the commutator, first remove the brush from the motor or alternator. Insert the commutator stone into the brushes place in the motor or alternator. Apply slight pressure against the commutator stone and by hand, slowly turn the motor or alternator shaft. As you are turning the shaft of the motor or alternator, the commutator stone cleans away the carbon that has built up on the commutator.
Use a vacuum hose to suck out the dust debris or tip the motor/alternator over and allow the carbon dust to fall out.

I am also attaching a video on how to install the brushes just for an extra reference.
Stairmaster Alternator Brush Replacement Video

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1 Answer

Freezer contents thawed, freezer cuts on but only runs a few seconds and cuts back off


Compressors do not usually shut down. Either there is a power interruption to the motor caused by the power switch or thermostat or the motor has developed an internal short whereby it uses excessive power causing it to overdraw/overheat and have the clixon circuit shut it down.

Jan 20, 2014 | Frigidaire Freezers

1 Answer

Hyundai motor problem warning motor light


run fault codes to check for failed sensor.

Nov 30, 2013 | Cars & Trucks

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I just bought an M-Audio Keystation 88ES. I have a used Behringer expression pedal. The pedal works fine in the sustain input, but when I insert the jack in the volume input it cuts all power to the...


If the power goes off when you plug in the pedal, the pedal LIKELY has a short in it between two of the three connections at the plug.

Firat, try putting the pedal plug in BEFORE applying power.

Likely the pedal presents a pot or volume control that will have like 5 volts across it an the wiper returned on the same cable. If the wiring configuration is wrong OR if the plug goes through a period of shorting the 5 volts out during insertion that will cause a problem...

To troubleshoot, move the pedal to half way and these with an ohmmeter for shorts between ANY two of the three connections.

Jan 28, 2011 | M-Audio M Audio Keystation 88es 88 Key USB...

1 Answer

Just recently had a friend give me a broken mxr phase 90. said that he couldnt get it to power on with a 9v batter and had never tried a power supply. so i just figured that it just needed a new 9v battery...


This is likely a problem very near the power input connector. It could be a blown filter cap (electrolytic) or a shorted protection diode. You can troubleshoot this with only an ohmmeter.

A broken power input connector could also be causing a short.

Often the input audio connector is used to switch the power on so trace the power circuitry looking for the problem.

Suggestion test seperate from other pedals. Be careful to not burn out your power supply during testing... we put a lamp in series with teh 120 volts to the power supply to limit current to a safe value while troubleshooting.

Aug 08, 2010 | MXR Phase 90 Pedal

1 Answer

I have a Husqvarna Viking 2000 SL and it seems there is a short in the cord. The machine has power because the light turns on, but the foot pedal does not work. Any suggestions?


The first thing to check is the pedal itself. If you have a continuity tester you can check to see if a connection is being made in the pedal when it's being stepped on.

You can also turn the handwheel back and forth while you step on the pedal with the power to the machine on. If the motor starts to run a little bit, you know the pedal is good and the motor carbons will be bad.

That machine's rear cover over the motor comes off somewhat easily, so you could also check the connections in the electric terminal where the foot control plugs in. Make sure to have it unplugged when you do this part. Gently move the wires near where they connect to the terminal block and see if any are loose. There are screws there that tighten onto the wires that sometimes loosen which would make your pedal not work.

Oct 07, 2009 | Husqvarna Viking 1

1 Answer

Brake and gas pedals


The vehicle has a optional adjustable brake to increase driver comfort. The brake pedal position is changed in phase with the accelerator pedal. The system is adjusted by pressing the dash-mounted switch that powers the driver motor mounted on the accelerator pedal assembly. The two-way motor operates backward (away from the driver) or forward (toward the driver) to adjust the accelerator pedal directly and the brake pedal through the drive cable attached to the brake pedal assembly.
--------------------
  • Adjustable brake pedal inoperative
  • Switch.
  • Circuit.
  • Motor.
  • Cable.
  • Obstructions
------------------------------------
PINPOINT TEST D: ADJUSTABLE BRAKE PEDAL INOPERATIVE Test Step Result / Action to Take D1 CHECK MOTOR SOUND
  • Allow two minutes for the thermal overload to reset.
  • Operate the adjustable pedal control switch.
  • Can the adjustable pedal motor be heard to operate?
Yes
GO to D2 .

No
GO to D7 . D2 CHECK MOTOR INSTALLATION
  • Check adjustable pedal motor for correct installation.
  • Is the motor installation OK?
Yes
GO to D3 .

No
CORRECT the motor installation. TEST the system for normal operation. D3 CHECK ADJUSTABLE ACCELERATOR PEDAL SYSTEM
  • Disconnect the brake pedal-to-accelerator pedal cable.
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  • Operate the adjustable pedal control switch.
  • Does the adjustable brake pedal operate now?
Yes
INSTALL a new adjustable brake pedal assembly. REFER to Section 206-06 . TEST the system for normal operation.

No
GO to D4 . D4 INSPECT FOR FOREIGN MATERIAL
  • Inspect the adjustable accelerator pedal assembly for foreign material causing a binding condition.
  • Was any foreign material found?
Yes
REMOVE the foreign material. RETEST for normal operation.

No
GO to D5 . D5 CHECK CABLE
  • Detach the adjustable pedal motor cable.
  • Inspect the ends of the brake pedal motor cable for wear or damage.
  • Are the cable ends OK?
Yes
GO to D6 .

No
INSTALL a new accelerator pedal assembly. REFER to Section 310-02 . TEST the system for normal operation. D6 CHECK CIRCUITS FOR SHORT TO BATTERY
  • Key in OFF position. Adjustable Pedal Switch C290
  • Disconnect the adjustable pedal switch C290.
  • Measure voltage at C290-1 and C290-7.
  • Is the voltage greater than 0 V at either pin?
Yes
REPAIR the short to battery. TEST the system for normal operation.

No
GO to D7 . D7 CHECK POWER TO SWITCH
  • Measure the voltage at C290-2 circuit 490 (RD).
  • Is the voltage greater than 10 V?
Yes
GO to D8 .

No
REPAIR circuit 490 (RD). TEST the system for normal operation. D8 CHECK GROUND TO SWITCH
  • Measure resistance to ground at C290-3 circuit 57 (BK) and C290-6 circuit 57 (BK).
  • Is the resistance less than 5 ohms at both pins?
Yes
GO to D9 .

No
REPAIR the open circuit. TEST the system for normal operation. D9 TEST SWITCH
  • Connect fused jumpers between C290-1 and -2 and between C270-7 and -3.
  • Does the adjustable pedal motor run in both directions?
Yes
INSTALL a new adjustable pedal switch. TEST the system for normal operation.

No
GO to D10 . D10 CHECK SWITCH-TO-MOTOR CIRCUITS CONTINUITY
  • Connect: Adjustable Pedal Switch C290.
  • Disconnect: Adjustable Pedal Motor C2001.
  • Measure resistance to ground at both pins of the adjustable pedal motor connector, circuits 1494 (RD) and 1495 (WH).
  • Is the resistance less than 5 ohms at both pins?

Apr 24, 2009 | 2003 Mercury Grand Marquis

3 Answers

Electric bike cuts out while riding


Couple possibilites. If it is just a matter of your battery clips coming undone, tighten the with pair of pliers then reattach. If it cuts out, then reengages when you start pedaling, either your controler is shot, or you have a ground short on your wheel hub. How long does a charge hold, and how often does it cut out?

Jan 14, 2009 | Electric Bicycle Motor, Bike,electric...

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