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84 yellow pc unit warming - Lexmark C532n Laser Printer

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The error indicates that the yellow photoconductor (pc) unit has nearly reached its rated life. You can still continue printing but will be at risk for developing print quality issues. It's advisable that yellow pc unit be replaced.
NOTE: When a pc unit is replaced, you will also need to manually reset the pc page counter as well.

Posted on Aug 20, 2010


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Replace pc unit problem on Lexmark W840 Laser Printer

Here is an excerpt I found from the W840 user manual. Looks like you need to change the photoconductor kit. Here is the link for the user manual:
To ensure print quality and to avoid damage to the printer, the printer stops operating after the photoconductor kit has reached approximately 60,000 pages (Letter/A4). The message 84 Replace PC Unit is displayed when the printer reaches this point. If the Toner Alarm setting is set to Single or Continuous (default is Off), the printer automatically notifies you before the photoconductor reaches this point and displays the message 84 PC Unit Life Warning. To avoid having the printer stop operating, replace the photoconductor kit when you first receive the 84 PC Unit Life Warning message. Once the photoconductor kit has been replaced, normal printer operation resumes

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Model no23912100 Auto temp control Water temp control should be warm at 100, but is at 80 cold at 70 but is 60 no control warm 86 hot 111 warm 84

If you could you post you make and model number, I will be able to help you further. The model number you posted is for a air condition blower unit.

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Display says 84 yellow pc unit missing, unit is installed took it out and reinstalled it message remains

i had the same problem and got on a chat with lexmark technical support and they helped me fix it, they referred me here, make sure those two crank wheels are in the up position, i did that and immediately the printer recognized the pc units and started working, i still had to reset the counts on the pc units, but the printer was instantly functioning

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Thanks for all the previous suggestions, it seems my 84 cbx750 has a intermittant,very poor spark on all 4. i have changed plugs and checked leads, still not starting....

Hi and welcome to FixYa,

Initially, a couple of checks when starting:
  • verify consistent + 12 on the black/white wires on the ignition coils and spark unit;
  • high pulsating ACV on the yellow and blue wires to the ignition coils from the spark unit;
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Postback results of tests.

Good luck and thank you for asking FixYa.

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yellow triangle means conflict error try updating the driver or you may have to reinstall the device

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Recently bought a samsung rl38sbsw fridge freezer it worked or 24hour Then side got really warm is this normal?

new new code...
5a 01..
3F 32 37 03 D0 73 84 84...
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1 Answer

84 yellow PC unit missing (all 4 showing missing)

I had the same problem here and it turned out that I closed the front door of the printer in the wrong way. It is tempting to close the black inner door by hand at first and then close the outer (beige) door. The RIGHT way is to close the beige door and let the inner door being automatically pushed in place by this procedure. All "missing PC unit" warnings disappeared immediately after this. I hope this solves it for you as well,

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Gestetner DSC332 SC393-02

Hello klwhite,
The answer to your question:
The error code means that there is a problem with the yellow dev unit. The manual says that "during warm up" the TD sensor saw .78 volts or less when it performed process control. We both know that this device may perform process control at times other than warm up. Sounds like the yellow dev unit is the problem as the sc393 means td sensor and the 02 means yellow developer unit. I truly hope I have helped you. Take care.........spinal......

Apr 25, 2008 | Gestetner DSc332 Copier

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