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Error: "93X Printhead Error"

Document ID:SO1748

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Problem

Error: "931 Printhead Error"; Error: "932 Printhead Error"; Error: "933 Printhead Error"; Error: "934 Printhead Error"; Error: "935 Printhead Error"

Environment

Optra family

Solution

A printhead error indicates that the printer thinks a failure has occurred in the printhead unit. Each printhead error has its own error code number. The code numbers are listed below, together with their meanings and some actions you can take to resolve the problem.

  • For ALL of these printhead errors, if this is the first time the printer has received one, try turning the printer off and on. Let it sit turned off for at least 20 seconds before powering it back on.
    If the printer continues to display a Printhead Error message, make sure it is plugged straight to the wall and not through a surge device or power strip. Power strips and uninterrupted power supplies can cause a low amperage problem in your printer which can trigger a printhead error, even if the printer has worked on this surge device for months.

  • If the printer is posting a 931 Printhead Error, it thinks the printhead unit is not receiving the first Hsync signal.
    If the printer is posting a 932 Printhead Error, it thinks the Hsync signal to the printhead unit has been lost.
    If the printer is posting a 934 Printhead Error, it thinks there is a "lock" failure with the mirror motor assembly within the printhead assembly.
    If powering off and on the printer does not clear any of these printhead errors and the printer is already connected directly to the wall, it may require service. It could have a defective printhead unit or there may be a problem with the engine/system board or one of the printhead cables. Note: If you are repairing such a printer, check the cables going from the printer's engine board to the printhead unit for any damage. Also check the continuity across these cables.

  • If the printer is posting a 935 Printhead Error, it thinks the mirror motor unit within the printhead unit cannot reach its operating speed. The tips above are applicable to this error too, but the exhaust fan on your printer might be the cause in this case. If the exhaust fan shorts out or gets stuck, it can draw power from the printhead unit and cause a 935 Printhead Error. Follow these steps:


  1. Stand in front of your printer. You will see the exhaust vent for the fan on the left-hand side of the printer. The fan is just on the inside of that cover.

  2. To reach the fan, you will need to open the top lid. Warning! Make sure the printer is turned off before going any further.

  3. Look along the inside of the UPPER lid, along the left-hand side. Look for a metal "circle' or wheel. It will be partially obstructed by a piece of black plastic. That "wheel" is the exhaust fan.

  4. Try spinning the fan a few times. If it does not spin freely, there is some sort of obstruction or problem with the fan and service will probably be needed.

  5. If the fan seems to spin freely, close the lid and turn on the printer.

  6. If the printer comes up to the READY status, try printing.

  7. If the printhead error does not return, try using the printer for a few days but keep a close eye on it. If the error does not return within a week, the printer should be fine. If the error does return, the printer will need to be serviced.

Again, if you are repairing such a printer, check the cables going from the printer's engine board to the printhead unit for any damage. Also check the continuity across these cables. Pay close attention to the fan/mirror motor cable.


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