Replace transfer unit - Konica Minolta bizhub C250 All-In-One Laser Printer

C360 error: "Replace Image Transfer Belt Unit"

The error message under that title is "Have the image transfer belt replaced soon." It's a new unit, but resists doing the Gradation Adjust. Tried returning the old belt (which was working before the replacement) and error message remains, so apparently the problem is not with the new belt.

System Error Clear (System 1 -> Initialization) gives "Result: OK" but has no effect; the problem remains after machine restart. However, it does NOT at any time give L-5 error (Transfer belt unit accumulated rotation time excess warning), just continues to say "replace image transfer belt unit", and will not allow anything else to proceed. What am I missing? (Transfer belt clutch malfunction?

In my experience, the fuser has always been the cause of the lines.

• Transfer unit lift trouble
• Causes: Transfer unit position sensor trouble. MFPC PWB trouble. Connection trouble of the connector and the harness. Transfer unit separation clutch operation trouble. Primary transfer belt unit is not installed.
• Remedy: Use SIM6-3 to check the separating operation of the transfer unit. Install the primary transfer belt unit. Replace the transfer unit position sensor. Replace the MFPC PWB. Harness and connector connection trouble. Replace the transfer unit separation clutch.

Paper transfer unit contact error

The paper transfer unit contact sensor does not detect the movement of actuator at the sensor while the polygon motor rotates.

?? Defective paper transfer unit contact sensor
?? Defective paper transfer unit contact motor

1. Check or replace the harness.

2. Replace the image transfer belt unit or paper transfer unit.
3. Replace the HVPS-TTS board.

See page 103 of http://downloadcenter.samsung.com/content/UM/201112/20111205134621713/EN/English.pdf. It looks like the clx6220 uses a transfer belt to transfer all the different toner powders to the paper.
see
http://www.genuinetonercartridges.com.au/genuine-samsung-clp-620nd-clp-670nd-clx-6220fx-clx-6250fx-page-image-unit-transfer-belt.html
The transfer belt unit is refered to also as the image unit !
Also each toner cartridge contains the OPC drum and is replaced when you replace a toner cartridge by the look of it.
You need a transfer belt to transfer the image to the paper and this is why they call it an image unit.
I am guessing that the transfer belt needs replacement !

2002 GMC Yukon

2002 GMC Yukon

2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

2004 TRANSMISSION Transfer Case - NVG 149-NP (One Speed Automatic) - SUV

TRANSFER CASE NO FRONT DRIVE

Transfer Case No Front Drive

Cause

Correction

DEFINITION: The transfer case is not delivering engine torque to the front propeller shaft.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Viscous coupling faulty 1. Inspect the transfer case fluid for being black. If the fluid is

black, it is most likely caused by a viscous coupling failure.

2. Test for a faulty viscous coupling. Refer to Transfer Case

Description and Operation.

3. Disassemble the transfer case. Refer to Transfer Case

Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

4. Inspect the viscous coupling for a bulged cover. Refer to

Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit

Repair.

5. Replace the viscous coupling if it is faulty. Refer to Transfer

Case Assemble in Transfer Case - NVG 149-NP3 Unit Repair.

Planetary carrier faulty 1. Disassemble the transfer case. Refer to Transfer Case

Disassemble in Transfer Case - NVG 149-NP3 Unit Repair.

2. Inspect for faulty planetary carrier components. Refer to

Cleaning and Inspection in Transfer Case - NVG 149-NP3 Unit

Repair.

3. Replace any faulty planetary carrier components. Refer to

Transfer Case Assemble in Transfer Case - NVG 149-NP3 Unit

Repair.

Causes for distortion or blurring
Cause
Solution
Transfer unit is defective
Replace the transfer unit. Calibrate the printer after
replacing the transfer unit.

Secondary-transfer roller is defective
If it does not rotate smoothly or is deformed, replace the
secondary-transfer roller.

DC controller PCB is defective
Replace the DC controller PCB. Calibrate the printer
after replacing the DC controller

its not so hard, open side door, remove 2 screws, and pull out the transfer unit gently. and reinstall new TBU. BE VERY CAREFUL WITH NEW UNIT, DO NOT DAMAGE IT.

i got this info from www.partshere.com site - they have most service notes for hp printer and sell most hp parts, including maintenance kits. I hope info. bellow is helpfu.

Replacing the transfer unit
Replace the transfer unit when the printer control panel displays REPLACE TRANSFER
KIT. The image transfer kit contains a replacement transfer unit for this printer.
WARNING! Remove any jewelry or any other metal items from your body to avoid electric shock.

1. Lift the front door handle and pull down the front door.
2. Grasp the right blue handle. Press and hold down the blue button. Slightly lift the right
side of the transfer unit.
3. Grasp the left blue handle and lift to remove the transfer unit from the printer.
4. Using handles, remove the new transfer unit from the bag. Use the blue handles on both
sides to hold the transfer unit.
5. Place the new transfer unit on a flat surface. Remove the orange shipping locks.
6. Guide the left side of the transfer unit into the front door of the printer. Insert the two
pegs on the left side into the holes, and then lower the right side into the door.
7. Make sure that the blue button on the right blue handle has released (popped up). If the
button has not released, grasp the right blue handle and pull the transfer unit toward you.
8. Firmly close the front door.
9. After the front door is closed, after a short time, the printer control panel displays the
message NEW TRANSFER KIT.
10. If the message NEW TRANSFER KIT does not appear, you must reset the transfer unit
count. To reset the transfer unit count, go to step 11.
11. On the printer control panel, press to highlight YES, and then press to select it. The
transfer unit count is reset, the printer recalibrates, and then the printer is ready to use.
NOTE If the old transfer unit was not at end-of-life when it was replaced (for example, if it was
damaged), the transfer unit count must be reset using the printer control panel.
Replacing the transfer unit when it is not at end-of-life
If you replace the transfer unit when it is not at the end-of-life, for instance if it is defective,
you will need to reset the transfer unit count and then calibrate the printer, through the
control panel.


To reset the transfer unit count, do the following:

1. Press MENU to enter the MENUS.
2. Press to highlight Configure Device.
3. Press to select Configure Device.
4. Press to highlight RESETS.
5. Press to select RESETS.
6. Press to highlight RESET SUPPLIES.
7. Press to select RESET SUPPLIES.
8. Press to highlight NEW TRANSFER KIT.
9. Press to select NEW TRANSFER KIT.
10. Press to highlight YES.
11. Press to select YES.
To calibrate the printer, do the following:
1. Press MENU to enter the MENUS.
2. Press to highlight Configure Device.
3. Press to select Configure Device.
4. Press to highlight PRINT QUALITY.
5. Press to select PRINT QUALITY.
6. Press to highlight CALIBRATE NOW.
7. Press to select CALIBRATE NOW.
8. Wait for the printer to calibrate.
The transfer unit count is reset and the printer is ready to use.

see pictures on link:
http://www.partshere.com/Models/Q5990A/CLJ_3550%203500%203700Installation_n_config.PDF

Most of the time when I find this happening on a printer, not just Ricoh's it turns out to be the PCU (photo conductor unit). The color PCU is one unit and the black is a seperate unit. Hope this helps.