di 470 starts to come on then shuts off

[henrys]

i have a 470 that will start to power up , i hear the fans come on ,lift motor start up..then after about half a second it shuts off , i replaced the main power switch..no luck.....any ideas ????

[time2fly]

Check the fuser area usually when a copier first starts then shuts off right away it's something in the fuser, a thermister or a thermostat. on the left side under the the main front cover there is a little cover that comes off after the screw is removed, under that cover are two push bottons one of those bottons will reset the copiers error aloowing it to bott up all the way. Good Luck

[Rolandito]

Once i found some staples at board that is at botton of the main board, its a brown board, i cant remember the exactly name at this time

[mascan42]

Sounds like something's shorting out. Does it happen if you turn the power on with the front cover open? That would eliminate the fuser and a couple of other things that don't turn on if the cover's open.

[Hansoon]

I remotely recall we once had an issue with the main relay Ry1.

Hans

[Bizhub]

Check the fuser area usually when a copier first starts then shuts off right away it's something in the fuser, a thermister or a thermostat. on the left side under the the main front cover there is a little cover that comes off after the screw is removed, under that cover are two push bottons one of those bottons will reset the copiers error aloowing it to bott up all the way. Good Luck

Time2Fly is correct , you will find that one of the thermistors is shorting out. Take the fuser unit out and see if the machine starts up.

Regards

[minimerlin]

If I remember there was a mod to fit a cover plate at the rear of the fuser to stop the fuser heater lamp cables chaffing/shorting...maybe worth a look!

[mascan42]

If I remember there was a mod to fit a cover plate at the rear of the fuser to stop the fuser heater lamp cables chaffing/shorting...maybe worth a look!

The mod was for the Di450/550. It was built into the 470.

[minimerlin]

The mod was for the Di450/550. It was built into the 470.

Yep..must be getting old, brain memory not like it used to be!! It was only a mod for the 450/550.

[feeder_supply]

So when I step into the motherboard a mouse urine, turns 10 seconds the screen goes blue and then nothing else, the solution was to change motherboard... good look