Burning smell during warm up

The printer requires a maintenance kit. (95% chance anyways)
I would suggenst the extended life maintenance kit (10,000 page lifespan) part number 108R00676 to correct this issue.
You can usually get these where you get your solid ink cartridges.

The maintenance kit needs to touch contacts to reset it.

There is a camshaft 020K14800 which may be cracked and therefore doesn't position these contacts. I suggest replacing this.

Whit
Item, Inc.

the maintenance kit keeps your melted crayons from sticking to the roller. You know the smell... and no you need a new one.

Most likely it needs service. Here is the service provider finder from Xerox.

You have either an intermittent Electronics module or a intermittent print head. Lowest cost new from Xerox is $750.
Phaser printers are expensive.

Go into Control panel, Open the Printers/View installed printers.

Right click on your printer, and remove the "Pause Printing" check mark.

No, it will not work because the chip (CRUM) is not compatable.

The reason he told you that is because ;
if left on permanently the fuser unit has a lamp ( nowadays the newer ones use a ceramic) the lamp continually comes on to keep the fuser warm and ready for you to print.which may cause the lamp to burn prematurely, most business keep theirs on all day with out the sleep mode( too busy to wait to warm up),

But, when you use the sleep mode most models do not turn on the lamp ( if it does it only puts out minimal power) but keep the power ready, which is why when you go to print it takes awhile to warm up.
The lamps are very resilient and last several years before having to change.

That has to do with the process drive gear box. May be mis timed or a gear broken.

you will have to explain more of your problem to give you any feed back