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- [Instructor] Troubleshooting
Common Printer Issues Part 1.

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Here we have that diagram
that we showed previously

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of the laser printer and all
the parts involved with it.

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It's a good idea to know
all these components.

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And also, remember your printing process,

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that laser printing process
that we talked about.

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You wanna apply those
steps within the process

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and everything that you
see here in this image

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when you troubleshoot laser printers.

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And the focus of what we're
gonna do here is laser printers,

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but some of what we talk about

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can be applied to other printers as well.

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But again, we're gonna
focus on the laser printer.

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That's the most important for the exam

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and for working in the field.

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So the first issue, paper
jams or creased paper.

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How many times have you seen this problem

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where paper gets jammed
up in a variety of places?

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Well, here's what you do to fix it.

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First of all, you turn
the printer on and off

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in the hopes that the printer
will clear the jam by itself.

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And that's known as power
cycling the printer.

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If that doesn't work,

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you'll have to open the printer
and move on to step two.

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Make sure you turn the printer off

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and unplug it before you do open it.

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So step two, remove paper trays

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and inspect them for crumpled papers.

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And if you find any,
those could be removed

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by grabbing both ends of the paper firmly

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and pulling it or rotating
the rollers to remove it.

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In general, you're trying
to clear the paper path.

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But if you just grab with one hand,

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you'll probably just rip the paper,

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so you wanna grab with two
hands firmly on both ends.

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Then verify that the right
paper type is in the printer.

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If the paper's too thin or too thick,

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it could cause a paper jam.

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Also, watch out for paper that
has been exposed to humidity.

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If it was stored in the
basement or something like that,

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the humidity could cause it

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to have a problem entering the printer.

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The rollers might have
a problem grabbing it,

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or it might grab too much paper.

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Next, check for dirty or cracked rollers.

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Those rubber entrance
rollers and exit rollers,

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they only last so long.

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A temporary fix is to clean those.

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And a lot of the maintenance
kits for printers

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will have a special cleaner
for those rubber rollers.

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And if you're in a fix, if
you're in a bind, I should say,

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a temporary fix is to
use isopropyl alcohol.

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You know, that 50/50 mix
that we talked about,

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the alcohol and water.

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And, of course, a permanent fix

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would be to replace those rollers.

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And that's part of the maintenance kit

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for most laser printers.

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Next, check whether the fusing
assembly has overheated.

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Sometimes the printer
just needs time to cool,

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or perhaps the printer is not
in a well-ventilated area.

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And in some cases, the fuser
might need to be replaced,

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or the fusing rollers might
have grabbed the paper.

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So there's a lot of possibilities there.

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And the fusing assembly

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can usually be removed
with a couple screws.

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You can get rid of that
entire assembly if need be.

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And finally, check the entire paper path.

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A duplexing printer, one
that prints on both sides,

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will have more complicated
and longer paper paths,

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and that means more chances
for the paper to get jammed.

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If you're dealing with
any copying machines,

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you can open up the entire
side of the printer,

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and you'll find that the paper

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could get jammed up in a
dozen different places.

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So there's some ways

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to troubleshoot paper jams
or creased paper issues.

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Next is if the printer
prints out blank pages.

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If you get blank pages,
you don't want this.

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And, you know, you're gonna
be looking at this image here.

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You're gonna be looking
at what's happening here

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and pay attention to that
printing process once again.

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Now, first of all, the
toner cartridge is empty,

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or maybe it failed.

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That's one of the possibilities.

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So install a new toner cartridge.

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And toner cartridge failures

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could be associated with the developing

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and the transferring steps of
the laser printing process,

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and the developing stage
as being the most common.

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In most cases,

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you're just gonna replace
that entire toner cartridge.

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Now, sometimes you'll see

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that the toner cartridge was installed,

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and the ceiling tape wasn't removed.

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There's that tape that you
have to pull out of it.

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So sometimes you'll get that also,

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and the printer will just
print out blank pages,

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or the pages will get jammed up

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because that tape is in the way.

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And finally, it's possible

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that the transfer corona
wire here has failed.

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And if that happens,
it won't pull the toner

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from the print drum down onto the paper.

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You remember that
opposites attracted portion

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of the transfer stage.

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So if the transfer corona wire fails,

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there will be no positive voltage.

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It won't have that opposite voltage

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to pull that toner onto the paper.

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You'll have to replace
that transfer corona wire.

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Or if it's integrated
to the toner cartridge,

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you're just removing the toner
cartridge and replacing that.

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Next is, multiple pages
are fed in at once.

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Well, that could be an issue also.

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And first thing you wanna do is check

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whether the separation pad
is getting enough traction.

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And there are these separation pads

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near the entrance rollers

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where the paper enters the printer.

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And it might need to
be cleaned or adjusted.

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Some of them have a little
screw that can be adjusted.

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And there's a little spring.
They're spring-loaded.

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Also, you wanna check...

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You wanna check whether
the paper is too thin.

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20-pound paper is usually recommended.

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But you might need more for your printer,

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or you might need more
for how this is adjusted,

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how the separation pad is adjusted.

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And you can replace the
separation pads if you need to.

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Those are usually part
of a maintenance kit

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for a laser printer.

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So there's a couple of
the common printer issues.

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And I'm breaking this down,

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this whole lesson down into four parts

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so you can absorb it a little better.

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Those first three, those
are real important.

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You can pretty much bet
you'll see questions on that

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on the exam or questions on the interview.

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So understand how the
printing process works

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and understand all the components involved

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in the laser printer.