Need Help!- Need help with the power unit

[zenon564]

Hello I have Fanuc 6M Stama mc 110.I have a problem.When I turn the machine, after a while aproximatly 10 minutes the machine turns off and on the power input unit there is a RED LED diode that turns on.
When I try to start the machine all over again,i have to push the "off" button on the MDI CRT panel and the the "on" button.
When I try to start the machine she doesn't want to turn on,after I push the green button I hear some clicking sound which is normal and I heard it before and then it turns off automatically.

[Al_The_Man]

Check the large 5v 24vdc power supply, you may have to remove each 24v output and then 5v to see if it stays on.
Often shorts on 24v limits switches etc.
Al.

[zenon564]

The sound comes from the magnet unit,Is it possible,the magnet unit to be broken?

[Al_The_Man]

Magnet unit? Do you mean Brake? If this is a 24vdc brake then it could be the cause.
Disconnect it and try powering up, obviously do not move the motor if it as a motor brake.
Al.

[zenon564]

No it's not the motor. I suspect in the power supply.
In the schematic of the machine it says magnet unit containing magnet connectors.
The machine turning on at all.I mean she isnt powering on.

[Al_The_Man]

Not sure what magnet connectors are?
The sequence is that when the machine powers up, it also applies power to the DC power supply, the DC supply sends a signal to the input unit that it is OK, if it is not OK, then the input unit shuts everything down.
The same thing happens during normal operation, if any thing happens to the P.S. then it signals to the input unit to shut down, I would disconnect the 24vdc outputs from the P.S. one at a time and see if the power stays on.
Al.

[zenon564]

Thanks for the help
I tried what you sad.I pulled out the 24vdc one at a time and when I tried to power on the machine she didn't to that.I connected the 24vdc like they were.I disconected the 5v from the MDI/CRT and I powered on the machine and she stay powered on for aproximately 2 minutes.I tried several more times to power on the machine to see if she stays but she powered off from 2 to 5 minutes.And then she displayed an alarm 607 PC.Then I connected the 5v like it was.And turned on the machine to see if she will stay powered on.And she did.I shut down the machine and after 15 minutes I tried again.I powered on the machine and she stayed on.She didn't shut down.I don't understand, I didn't fixed anything. What happend?

[vger]

Magic. You may have had a bad connection that was causing the problem.

[zenon564]

The same problem again.The machine powers up and stays on for about 2 minutes and then shuts down.When I try to turn on again,she doesnt want to.There are +24vdc on the power supply that are missing,there is no current in those wires.I don't konow what is the problem.If there is anyone that could help me.

[Al_The_Man]

I am betting it is a short on either the 24vdc or maybe 5v.
There is a way of getting the Input unit to stay on in fault mode, but the risk is that the fault is still present if it is a short on the 24v for e.g.
I will have to look up the jumper that is needed.
In the mean time disconnect the 24vdc one at a time.
Al.

[zenon564]

Is it possible the monitor to makes all of the problems I have?
Because sometimes the numbers on the monitor moves, and after a while the monitor stabilizes.That hapens every time I start the machine.

[Al_The_Man]

I had a similar problem that was due to a voltage regulator IC on the Video board that pulled the 24vdc down.
Al.