Why the words and images come off the paper when a hand is run across them?

The fuser part is a fuser assembly. I think you can remove the assembly which is not much difficult. Remove the screws, connectors. You have to remove the tight springsor any other screws holding the metal L plate,. Remove the roller then the fuser. Remove the lockable end cap of the fuser at the other end where there are no heater wires. Remove the fuser film (which you called plastic film). Replace it with new one. Normally it is required to be replaced if it is torn or have holes caused by foreign materials or the life is over. If you are still unable to do it, write me back.
-sonsunny

Hello,

There are a few possible could cause this. First, the fuser assembly may be damaged or at the end of its life. The solution is to replace the fuser assembly. Repairing a fuser assembly is generally not recommended because the fuser is considered a consumable printer part and not worth the time or effort to fix. Second, the toner cartridge may be defective and letting too much toner out at one time. In a black-and-white laser printer, the solution is to replace the toner cartridge.

Take care.

Hi G,

99% of the time the error is the fuser. Either it is damaged, or just not locked in place, and with power off, reseating it will fix the error. Since you just replaced the fuser, I guess the question is did you do it because it was also giving this error, or because it reached EOL ( end of life ).

If it was for EOL message, I would try reinstalling it. If the "reseat fuser" error goes away, but comes back with the new fuser again, then the new fuser you purchased is defective and should be returned or exchanged.

See the information below to correctly troubleshoot your issue.

The following steps are the troubleshooting steps that should be followed for error code 010 397.
First, the definition of the failure is <IOT Fuser Failure>, and means a Fuser Error is detected.

1) With power off, reseat the fuser by physically removing it from the printer, then reinstalling it and locking it in place. Turn the power back on. ( if the error is still present, proceed to step 2 ).

2) If reseating the fuser did not resolve the problem, Replace the fuser with a known good fuser.
( if problem is not resolved, proceed to step 3)

3) Replace the LVPS ( low voltage power supply ). ( if problem not resolved, proceed to step 4 ).

4) Replace the PWBA MCU ( printed wiring board assembly - machine control unit ).

END of troubleshooting.........

In most cases, the fuser itself is the problem. If you tried to reseat or replace the fuser while power was still on, the LVPS could have been damaged just as if there were an electrical storm.

Hopefully this helped.

To test fuser out of circuit make sure lamp and thermal fuse are not open circuit, and thermister is neither open or shorted


Fuser repair procedure from tec manual.
Fuser Failure (U4-1, U4-2, & U4-3)
1 Switch off printer main power. Remove the Fuser Full Cover so you can observe the Heat Rods. Switch on printer main power and observe the ends of the Fuser Assembly. The Heat Rods glow.?
Y N
| Go to step 5.
2 Replace the Printer Engine Controller PWB (REP 4.10.6). The error message reappears.
Y N
| Problem solved.
3 Replace the Fuser Assembly The error message reappears.
Y N
| Problem solved.
4 Check for a broken wire or a loose connection
between components
5 Measure the AC voltage between J23-2 and J23-6 on the AC Driver PWB. There is 110VAC (or 220VAC if the printer is the 220VAC model) between J23-2 and J23-6.
Y N
| Go to step 7.
6 Replace the Fuser Assembly (REP 4.7.1). If the problem persists, replace the Printer Engine
Controller PWB (REP 4.10.6).
7 The Fuser cycles up and down.
Y N
| Replace the Printer Engine Controller PWB
8 Measure the voltage between P401-1 and P 401-4 when the Fuser Fan cycles up and down. There is 24VDC between P401-1 and P401-4 when the fan is rotating and 0VDC when the fan is off.?
Y N
| Replace the Printer Engine Controller PWB
9 Replace the AC Driver PWB

Please rate solution to your question "How can I check that new Fuser unit is ok?"

if this happens every time you need to replace the fuser. but there is a possibility it could be the main gear drive assembly, 9 times out of 10 it's the fuser. a gear on the fuser usually breaks a few teeth. the fuser is very easy to replace and is a part that will eventually need replacing on all printers.