C3220 fuser unit disassembly

[repeatcopiers]

I have a fairly new fuser unit that has a gauge in the upr fuser roller. I'm trying to replace the roller but am having a difficult time taking the fuser unit apart. Does anyone have a diagram that will help?

[teckat]

I have a fairly new fuser unit that has a gauge in the upr fuser roller. I'm trying to replace the roller but am having a difficult time taking the fuser unit apart. Does anyone have a diagram that will help?

F1.JPGF2.JPGF3.JPGF4.JPGF5.JPGF6.JPGF7.JPGF8.JPGF9.JPG F10.JPG

[repeatcopiers]

Thank you so much, helps alot!!

[johnturknett]

Re: C3220 fuser unit disassembly

This is very helpful and made the job a lot easer. Thanks

[charm5496]

Re: C3220 fuser unit disassembly

make sure that your pastic frames are not warped from age and heat. They can also start to crack out around the screws on the bottom frame causing uneven pressure.

[teckat]

Re: C3220 fuser unit disassembly

to add on ///
always clean any rough spots (hard caked on toner) from that (black plastic) fuser paper guide- even small amounts will cause jams into fuser

[kallaserves]

Re: C3220 fuser unit disassembly

This has been a very helpful post. I had to disassemble a fuser unit to replace the upper roller that got mangled (see picture). However I have 2 issues I'm running into.

1. I don't quite know how far to tighten the 2 screws that hold the upper frame to the compression spring fixture.

2. When I plug the whole unit into the machine it just says "printer is warming up" without the warming up cycling noise. I doubled checked and everything was plugged back in. I even tried a backup fuser and that one was able to do the regular warm up cycle.damagedupper.jpg

[teckat]

Re: C3220 fuser unit disassembly

This has been a very helpful post. I had to disassemble a fuser unit to replace the upper roller that got mangled (see picture). However I have 2 issues I'm running into.

1. I don't quite know how far to tighten the 2 screws that hold the upper frame to the compression spring fixture.

2. When I plug the whole unit into the machine it just says "printer is warming up" without the warming up cycling noise. I doubled checked and everything was plugged back in. I even tried a backup fuser and that one was able to do the regular warm up cycle.
[ATTACH=CONFIG]17575[/ATTACH]

Make sure u did not crack either the Fixing Main Heater or the Fixing Sub Heater-
remove to inspect-------------------

If you have loosened the adjusting screw used to secure the upper frame and the lower frame of the fixing unit in place (as when replacing a roller), be sure to adjust the nip of the fixing roller as follows:
1) Turn the adjusting screw at the front/rear so that the length of the pressure
spring is 31.5 mm.
NIP WIDTH.JPG

Fit the fixing unit in the machine, and execute the following service mode to
measure the nip: COPIER>FUNCTION>FIXING>NIPCHK.
NIP.JPG

REMOVE/DISCONNECT SORTER TO SEE PAPER EXIT

Adjust the balance between the front
and the rear:
• If the median value of the measured nip is toward the lower limit of the
standard, tighten the screw on the side with a lower nip value at the edge.
REF.------
A 1/2 turn of the screw shifts the nip balance by about 0.4 mm. A 1/2 turn on the screw at
the front will increase the nip at the front by 0.3 mm, decreasing the nip at the rear by 0.2 mm.
• If the median value of the measured nip is toward the higher limit of the standard, tighten the screw on the side with a higher nip value at the edge.
• If the nip needs adjustment while the nip balance is correct, the adjusting screws both at the front
and rear may be given a 1/2 turn so that the nip may change by about 0.3 mm.


U need to check Fixing Main Thermistor position

When attaching, be sure so that the retaining spring forces the fixing thermistor in place.


Fixing Main Thermistor.JPG

Also check Fixing Thermal Switch--

When mounting, be sure so that the leaf spring of the fixing thermal switch is in contact with the
rib of the upper frame.



Check Fixing Sub Thermistor <<<

[teckat]

Re: C3220 fuser unit disassembly

This has been a very helpful post. I had to disassemble a fuser unit to replace the upper roller that got mangled (see picture). However I have 2 issues I'm running into.

1. I don't quite know how far to tighten the 2 screws that hold the upper frame to the compression spring fixture.

2. When I plug the whole unit into the machine it just says "printer is warming up" without the warming up cycling noise. I doubled checked and everything was plugged back in. I even tried a backup fuser and that one was able to do the regular warm up cycle.[ATTACH=CONFIG]17575[/ATTACH]

also check this when u pull out the fuser unit>>>

Remove the Delivery Vertical Path Unit on the left side of the machine. You will see a photo sensor PS5 Fixing Feeder Unit Open/Close Sensor sandwiched between two micro sensors that actuate when closing the Fixing Feeder Unit. Clean that photo sensor as it fills up with dirt and dust.

click on pics to view/
first pic shows Delivery Vertical Path Unit already removed

[kallaserves]

Re: C3220 fuser unit disassembly

Hell Teckat,

Thank you for the extremely informative and detailed reply. Please tell me this is what you do for a living.

I've checked the thermisters and thermal switches and they seem to be fine.

I did notice that while checking the nip. I can't see the values that you described all I see is an ok (please see my picture)

When I plug the unit in, all I get is a printer is warming up message like the one in the picture. However I checked the nip in this and it also checked out to be ok. The problem still remains, the rollers don't drive when it's warming up. I did check that the rollers do get hot so I know they're warming up. But I'm afraid to let it warm up without the driver rollers being driven.

The backup fuser I got works great so I know the problem is my fuser. Do you have any other suggestions?

100_1437.jpg100_1438.jpg

[teckat]

Re: C3220 fuser unit disassembly

if u have no rotation > how did u get paper to exit on nip check???

U need to check that top connector / and interior wires on fix unit/ did u check heater lamps and it connectors ???
see pic/

Copy of Copy of DoorSw_5 (Medium).jpg
how did u measure nip if printer is in warming up ????


u should have a sheet of paper exit fuser to see nip( it stops 1/2 way to create a sheen nip to measure)

did u do this below ????

Fixing nip width automatic measurement output.
Operation -COPIER>FUNCTION<FIXING>NIP-CHK
1) If the finisher is connected, remove it from the copier and pull out the method lattice cable.
2) Place A4 or (LTR) size paper in the manual feed tray.
3) Press the OK key (the paper in the manual feed tray is fed).
4) When the fed paper is pressed by the fixing roller, it stops, and is delivered about 15 seconds later.
5) Check that the nip width of the delivered paper is the standard value.
After completing the operation, output a test print (COPIER>TEST>PG>TYPE (6): Grid).


you wont see nip numbers/ that pic just shows a measurement u can take on paper after it leaves fuser(paper should have flat sheen cross feed mark on it to measure with a metric for the nip >pic is a little misleading showing that arc in middle> as long as that nip area looks even across paper and fall within spec u should be ok>>>



been doing this for 24yrs