MPC4502 Dead

[mrfuser]

Have a new client with an MPC4502 completely dead. Fuses are fine. Any thoughts?

[Zaxxon]

Re: MPC4502 Dead

PSU

[jeff33]

Re: MPC4502 Dead

What he said

[bob marley]

Re: MPC4502 Dead

PSU

What he said

Power Supply Unit

[Melvinp]

Re: MPC4502 Dead

Power supply unit, check DC output.

[mrfuser]

Re: MPC4502 Dead

Ok ordered psu. Any thoughts why since no fuse blown?

[totoro]

Re: MPC4502 Dead

You could have a short or pinched wire. I would start cutting tie wraps and flexing wire harnesses to see if it will power up.

[Lagonda]

Re: MPC4502 Dead

Ok ordered psu. Any thoughts why since no fuse blown?

One of the triacs has decided it doesn't want to play the game any longer. It's gone open circuit not short circuit so no current flow so no blown fuse.

[duct tape]

Re: MPC4502 Dead

Can you go to the web image monitor to see if any codes are there , I've done this in the past sometimes it helps .

[Polarbear]

Re: MPC4502 Dead

If you say "dead" do you mean no display - with or without power light.

If the power light is on with no display - it might be the dreaded sc202 that plagued the previous series of machines.

That sc is only visble by shining a flashlight on the display to see the code (as there will be no backlight) or as said before on the WIM.

[ruben]

Re: MPC4502 Dead

Check everything from the wall socket, right through to PSU. Do you get a power light? Power light with or without startup noises / fans?

If the PSU looks good, run the machine with both front and right hand door open. This will stop the fuser and laser from running, it won't eliminate them entirely, but it could help.

In the UK we have fused plugs, have had a few PAT'ers replace the 13amp fuse with a 3/5amp, blown within the same day. They don't seem to understand that these machines need those fuses...

[Counsel]

Re: MPC4502 Dead

I had one go dead 2 days after install, once i pulled the back i found the white and black "F" connections to the power supply were loose the plastic part was connected but the wire inside the plastic was not pulled all the way through so it looked like it was plugged on all the way but the wire was barely touching the terminal inside.

You can put a multimeter against the terminals make sure there is power actually hitting the PSU. If you got power from the wall, through the cord, and on the terminals then probable that something is wrong with the power supply unit.

[vergonazo]

Re: MPC4502 Dead

If you really want to know what killed the psu though the first thing is to disconnect the IR power pack board. Then the laser and finally your controller box in any order you prefer. See what happens.

There is always the possibility something happen just prior to your arrival, including a power cut in the office or a cleaner d/c the machine by mistake to plug in their hoover.

[slimslob]

Re: MPC4502 Dead

I have had instances where a shorted motor has caused a power supply to shut down. Check all motor that are switched to ground to operate for internal shorts to ground. If you find one, leave it disconnected and see if the machine will power up.

[Iowatech]

Re: MPC4502 Dead

I have had instances where a shorted motor has caused a power supply to shut down. Check all motor that are switched to ground to operate for internal shorts to ground. If you find one, leave it disconnected and see if the machine will power up.

A bound up motor will also cause excessive current draw, which can damage other things. On one of the older models I was working on a locked toner feed motor released the magic smoke from the IOB. Literally. It smelled so bad that the people had pushed the machine into the parking lot by the time I got there, and they would only let me move the machine inside one one of the lesser used entryways until I fixed the machine.