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What is the pcu - Gestetner Office Equipment & Supplies

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Posted on Nov 19, 2015

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MX 351U SHOWING E7-90 ERROR CODE WHAT THE SOLUTION


This is a PCU PCB Communication error. 9 times out of ten it will reset by simply switching the machine off and then on again. If the problem persists here is the section from the manual that describes the possible causes and remedies.

E7-90
MFP - PCU PWB communication error
Trouble content
Detail
MFP
Cause
PCU PWB connector connection trouble. PCU PWB - MFP PWB connection trouble. PCU PWB trouble.
MFP PWB trouble.
Mother board trouble.
Check & Remedy
Check connection of the PCU PWB, the MFP PWB, and the mother board.
Check the ground.
Replace the PCU PWB.
Replace the MFP PWB. Replace the mother board.
I hope this helps

Good Luck

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Jan 14, 2014 | Sharp Office Equipment & Supplies

1 Answer

My lanier is making dark copies


One of the most common reasons for a Lanier 5222 or 5227 to make dark copies is a problem with the drum unit or developer. Fortunately on those machines, the drum unit and developer are all self-contained in one easily-replacable unit, called the PCU (photoconductor).

If you don't have a new PCU handy, you can order one from the same company you get your toner from. The PCU should generally be replaced every 60,000 copies, but sometimes it may need to be replaced sooner (especially if you run a lot of dark copies or make a lot of copies of images) and it can often run longer than 60,000.

Replacing the PCU is easy -- it sits right next to the toner bottle, and all you have to do is slide the old PCU out and slide the new PCU in (once you remove all of the tape and other trappings from it). Instructions will be included in the box with the new PCU.

Please rate the effectiveness of this solution. Thank you!

Oct 10, 2010 | Lanier 5222/27 Laser Printer

1 Answer

How to replace image unit ricoh aficio 220


Do you mean the photoconductor unit? To replace the photoconductor (PCU), open the front cover and the right side covers (the duplex door and the main side door). The PCU sits to the right of the toner bottle -- it is a black unit that has the blue cylindrical drum facing the right side of the copier.

On the upper left side of this unit is a ridged tab. Push this tab in and slide the PCU all the way out of the machine. Open the box with the new PCU and remove all of the tape and paper, then slide the new PCU in where the old one came out of. When you shut all of the covers, the copier will recognize the new PCU.

Apr 23, 2010 | Ricoh Aficio 220 Laser Printer

1 Answer

How to clear the pcu code


The printer is set to display the "replace PCU" message after a set number of copies. The only way to clear the message is to replace the color PCU that the message mentions.

Apr 17, 2010 | Ricoh Aficio CL2000N Laser Printer

2 Answers

SERVICE REQUIRED E 511


The 511 error relates to the PCU rotation sensor. There are several causes and solutions.
Causes 1. Toner build up on PCU foil square 2. Toner powder build up on sensor 3. Misalignment of PCU band 4. Damaged PCU foil square.
Solutions 1. Toner build up on PCU foil square Remove PCU from printer and carefully rotate the PCU band around until you see a silver foil square. Remove any excess toner from foil square. Inspect condition of foil square, if damaged go to solution 4. Reinsert PCU and test.
note: PCU band is best described as a black rubber-band type looking material that rotates around the PCU. Be careful not to touch it with fingers or expose to bright light as this can damage it. Clean foil with simple tissue cloth or similar.
2. Toner powder build up on sensor. Remove PCU unit and using a vacuum and/or can of compressed air spray/**** off excess toner powder from sensor inside of printer. The powder can block the sensors ability to sense the foil square, giving you the error.
Note: Sensor is hard to find, but looking at the foil square on PCU band you should be able to judge by line of sight the approximate location, you are looking for a box with a small tab wire with 2 wires coming out from it. Spray / vacuum in that area. Make sure printer is unplugged be careful not to create a excess of static electricity with the vacuum.
3. Misalignment of PCU band If your PCU band has moved off to the right or left of the roller, it will need to be realigned. A simple check of the right and left position on the roller will determine if you need to realign. To realign take apart PCU and carefully manipulate into correct position.
Note: Wear gloves and expect this to be messy with toner. Try not handle PCU band excessively as once it is damaged print quality will be ruined and PCU will need to be replaced.
4. Damaged PCU foil square. If the square is damaged, replace with a piece of tin foil. Superglue on carefully.
note: You don't need to put the new square in exactly the same place, just above or below on the belt is fine.

Mar 27, 2010 | Epson Aculaser C1100 Printer

2 Answers

Ricoh Aficio AP3800c--message to replace black PCU, have done same and still get message?


This must be done before drum is replaced.
Resets counter.

Start the SP mode and execute the
New Unit Set:
• PCU: SP5-999-001 ∼ 004

Feb 03, 2010 | Ricoh Aficio AP3800C Laser Printer

7 Answers

SC392


Hi,
SC 392 Possible causes -
· Someone forgot to remove the toner seal of the PCU
· ID sensor defective
· TD sensor abnormal
· Drum does not turn
· Development roller does not turn
· Poor connection of the PCU
Regards,

Jun 11, 2009 | Ricoh Aficio 2022 All-In-One Laser Printer

1 Answer

Ricoh aficio cl3500n reads replace colr pcu what is this?


The PCU is the photconductor unit. There is a black pcu and a color pcu. Did you replace these or replace the toner cartridges??

http://www.websitetoolbox.com/mb/copierquestions

Jan 19, 2009 | Ricoh Aficio CL3500N Laser Printer

1 Answer

Richo Printer many white lines on black print out


  1. PCU needs R/R
  2. You should replace the PCU if prints show any of the following symptoms.
    • Colors are missing, faint, or partially blurred.
    • Toner smears appear.
    • White or color rivers appear.
    • White or colored streaks appear.
  3. Important: Switch off the device and disconnect it at the mains.
  4. Open the right side cover.
  5. Pull the green levers as shown to release the inner cover.
  6. Lift the inner cover upwards.
  7. Squeeze the green lever on the black PCU.
  8. Pull the unit carefully out of the device and dispose of it in accordance with your local environmental policy.
  9. Place the new PCU on a flat surface.
  10. Peel off the tape from around the new PCU.
  11. Remove the top cover from the PCU. DO NOT remove the bottom cover at this stage.
  12. Rest the new PCU in the device as shown.
  1. Push the PCU into the device while holding the bottom cover. You will hear a click when the PCU has locked into place.
  2. Lower the inner cover.
  3. Push the two green levers as shown to secure the cover.
  4. Close the side cover.
  5. Connect the device at the mains, switch it on and wait for the self-test operation to finish.
  6. Please remember to rate all users who assist you for free :)

Jul 30, 2008 | Ricoh Aficio CL3500N Laser Printer

1 Answer

Time to change PCU


You just have to press the "yes" button. Watch the display. It says "Change PCU Y/N"

Mar 26, 2008 | Office Equipment & Supplies

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