Removing the case of a prn 50-m

50.1 Fuser error:Low/No Fuser tempatrature, replace Fuser assembly.
For service engineers: Reason: thermo switch open, remove fuser assembly, dis-assemble up sleeve, check switch continuity, if no continuity, remove switch & just hit gently on aluminum capsule till continuity comes,make sure it should not damage or dent,once continuity comes, clean main thermister & sub thermister, fix it back, power on the printer, chek errors,adjust fuser temperature in low, give prints up to 50 blank copies, chk.. if problem repeated replace Fuser assembly, but success rate is 70% for above exercise. Note: Only professionals can perform this activity..
Thermo switch:

change paper cartridges.

Welcome to FixYa.

To generate a PRN file, you need to have the printer driver installed in your computer. You should be able to see the PRN option (in some cases, it is termed as 'save to file') in the printer dialog box.
In your own software, you have to use the printers driver as well to produce a PRN file as well.

Since you are also unable to send the print command to your printer, it seems that your printer driver is not present or might have been corrupted.

Download and install the driver for your printer from >>HERE

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Jas247

Thank you for visiting Fixya!

MFC-440cn
Error Message 50

1) Remove Plastic wire covers from inside printers, and release plastic stay on lower edge, tilt cover to 90 Degrees
2) make a note of where each connector goes
3) release the Ribbon and 3 Multicore cables, removing grounding screw, then remove scanner module by sliding it off the hinges at 90 degrees.
4) Remove Three Front Panel Screws, carefully leaver front panel upwards releasing front side clips.
5) Remove front panel by disconnecting ribbon and wireing on both sides.
6) Remove 6 Screws (2 on back, three at front and one middle right
7) Carefully remove speaker cable (Red Connector) and lift up plastic casing, leaving printer uncovered.
8) Re-Seat Encoder Strip into guide. (The Transparent strip)
9) Re-assemble in reverse and Hey Presto.

A handy trick:
Put a 1,5inch tape onto the printhead cover where the encoder strip runs thru to prevent this error in future.

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1. Remove power to the printer for 15 minutes. If this doesn’t clear the error:
2. Perform the Fuser Checks shown in the table below.
3. Check the Fuses (FU101 and FU201) on the DC Controller PCA. Replace if faulty.
3. Replace the DC Controller PCA.

SUSPECT
CHECK
1. Connector
Contact Ensure that J103 and J204 connectors on the Fusing Assembly are seated securely into the DC Controller PCA connectors. Reseat the Fusing Assembly,
2. Thermistor wire open.
Remove the Fuser and measure the resistance between connectors J204-1 and J204-2, Resistance
should read approximately 440 K Ohms at 20 Deg C (room temperature). If the thermistor wire is open, replace the Fusing Assembly.
3. Thermal Fuse.
Measure the continuity between connectors JI 03-1 and J1 03-2 on the Fuser. It should be approximately 29 Ohms. If the thermal fuse is open, replace the Fusing Assembly

Solution provided by printer manufacturer tech support which worked for me.
1. Open all doors (front & back)
2. Remove tonner
3. Turn off power
4. After 20 secs turn on power
5. Close back door
6. Insert toner
7. Close front door

Fixed now!

remove cartridge and leave top door open, then remove two screws in back ; open front sheet panel to find two screws to remove then remove outer case carefully AND PLACE ON LEFT SIDE BECAUSE THERE'S A RIBBON WIRE ATTACHED.
there are 4 screws holding the fuser unit in place, remove AND LIFT OUT BY ROLLING TOWARD YOU to reveal 2 screws to access the red roller assembly!
In my case there was a very tightly wound piece of paper stuck in there not visable without removing the screws on the fuser unit!

remove the drum by opening the LHS of the printer & removing the toner waste bottle, then depress the grey button on the drum assembly & firmly pull the assembly out. Best done in a darkish room as the drum is light sensitive.
The black line couldn't be fixed as it is caused by a scratch less that 2mm long on the drum. Ether a new drun at £299 or a new printer ar £245..

1. Disconnect printer power cord
2. Open the printer cover
3. Press and holding power button connect power cord
4. Close cover and release power button (you are now in service mode)
5. Download and use to reset this tool
http://www.servicemanuals.ru/download/canon/ip1000st.zip
6. Unzip and remove read-only attributes from files Pattern.prn and EEPROMData.prn
7. If it did not recognize the printer on usb port - you must enter the port mannually (ex. USB017), info taken on printer properties.

8. VOTE as FixYa!!!!!!