Pressure roller how did you replace the pressure roller?

If you wish to get some details; check the site linked here. Pull up older posts......
http://electro-medical.blogspot.com/

3 inches is approximately 70 or so mm so i would say you have a bad drum on your toner

27mm - charge roller - Replace toner
75mm - Photosensitive Drum - Replace toner
34mm - Developing Roller - Replace toner
39mm - Transfer roller - clean/replace transfer roller
57mm - Fuser Film - Replace Fuser
56mm - Pressure Roller - Replace Fuser

Pressure roller fusing lamp consecutive full power 3
When the fusing unit is not running in the ready condition, the pressure
roller fusing lamp keeps ON full power for 30 seconds or more.
?? Broken pressure roller thermostat
?? Broken pressure roller fusing lamp
1. Replace the pressure roller fusing lamp.
2. Replace the pressure roller thermostat.
3. Replace the PSU.

sc 569 is the pressure roller contact sensor error
Troubleshooting Procedures: 1. Check or replace the harness of the pressure roller contact sensor.
2. Replace the pressure roller contact sensor.
3. Replace the pressure roller contact motor

If the mark is persistent on each page and repetitive with very precise spacing, you need to determine which roller it's coming from. It could be coming from the transfer roller, before the fuser, the fuser itself, or the fuser pressure roller. Measure the spacing distance of the mark(s), then measure the diameter of the 3 above mnetioned rollers, multiply by pi (3.14159265) and compare the results to determine exactly which roller is causing the issue, then replace that particular roller. Hopefully it's not the fuser as you'd be better-off replacing the fuser film (main fuser roller lining). The fuser and pressure roller are a pain to source, and run abou $65+ for the pressure roller, and about $90+ for the fuser, not to mention this 2 last rollers will take about 1-1.5 hours to replace. They are not hard to replace using common tools. Don't forget to locate the printer service manual over the internet first.

sc 569 is the pressure roller contact sensor error Troubleshooting Procedures:
1. Check or replace the harness of the pressure roller contact sensor.
2. Replace the pressure roller contact sensor.
3. Replace the pressure roller contact motor

usally you do not have to replace the pressure roller until your machine goes over 2mil. copies. sometimes it does need to be cleaned. you can clean it by scraping the pressure roller with scissors to remove the built up ink. to remove the pressure roller.1. Remove the drum2. if you look the pressure roller is held in by 1 screw on the frame of the machine. there is a hole in the frame to put a Philips (+) head screw driver through and remove 1 screw. BE CAREFUL NOT TO DROP THE SCREW!.3. gently push the pressure roller to the rear of the machine slightly then lift it up and pull towards you.
to reinsert the pressure roller line it up with the cutouts where it was removed the pull it towards you to secure it. then screw it back in.
PRECAUTIONS FOR REASSEMBLY make sure the pressure roller is well seated on both ends of its holders (front and back) and that it spins freely. if the drum does not go back in easly something is wrong.

SC 552 - Pressure roller warm-up error

Definition: After the main switch is turned
on or the door is closed, the
pressure roller temperature
does not reach the ready
temperature within 150
seconds during fusing unit
warm-up.

Possible Cause:
• Pressure roller fusing lamp broken
• Defective pressure roller thermistor
• Defective BCU

Troubleshooting Procedure:
1. Check if the pressure roller thermistor
is firmly connected.
2. Replace the fusing unit.
3. Replace the BCU.

change the film aswell......film will last longer if cleaning assembly is changed rountinly

C46 indicates Abnormal pressure roller thermistor during a ready state.

Perform following inspection:

1.. Clear the status counter.
Change the current status counter value (08-400) “3” or “8” to “0”.

If happen again, perform following inspection:

1. Check the pressure roller thermistor.
(1) Check if the connector is not disconnected.
(2) Check if the pressure roller thermistor closely touches the surface of the pressure roller.
(3) Check if the harness of the pressure roller thermistor is not open-circuited.

2. Check the LGC board.
(1) Check if the connector J334 is not disconnected.
(2) Check if the conductor pattern on the LGC board is not short- or open-circuited.
(3) Replace the LGC board.