Registration Error 3
When a color registration error is detected with coarse
adjustment, or with the main-scan line adjustment.
PU firmware does not notify this warning to CU firmware
at the time of Shipping Mode. Therefore, this status
does not occur in a user environment.
n
2 = Yellow
3 = Magenta
4 = Cyan
Dens Shutter Error 2
DENS SHUTTER ERR
Check 3: Check to see whether the sensor shutter opens and closes normally, by the
MOTOR & CLUTCH TEST of the self-diagnostic function. If the shutter operates
imperfectly, replace the shutter unit.
Power on printer while holding both the + & - buttons simultaneously; release when “OKIUSER” is displayed.
Press either the + or – button until “ENGINE DIAG MODE” is displayed; press the Enter button and “DIAGNOSTIC MODE xx.xx.xx” will be displayed.
Press and hold both the - & On-line buttons simultaneously until “ENG DIAG LEVEL2” is displayed.
Press either the + or – button until “CONSUMABLE COUNTER SET” is displayed, press the Enter button; you are now in the menu to set various consumables.
Press either the + or – buttons to scroll through the various consumables, at the desired consumable press the Enter button and the last digit of the count will start flashing.
Press the Cancel button to decrease the digit amount or press the On-line button to increase the digit amount; press the + or – buttons to move along individual digits in the count.
Once the count is at the level you desire, press and hold the On-line, Cancel, & Back buttons simultaneously until the “*” reappears next to the count; consumable’s count are reseted to the number you specified.
Press the + or – buttons to move to the next consumable and repeat at step 5.
Once all consumable counts have been set to desired amounts that are below their end-of-life thresholds, you can use the Back, +, & - buttons to exit through the menus
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When a color registration error is detected with coarse
adjustment, or with the main-scan line adjustment.
PU firmware does not notify this warning to CU firmware
at the time of Shipping Mode. Therefore, this status
does not occur in a user environment.
n
2 = Yellow
3 = Magenta
4 = Cyan
My OKI C5800LDN printer displayed the Service 121 error last night. After reading the previous solutions, and trying them with no success, I followed the instructions in the service manual, and removed the High Voltage Power Supply Board. There are four cables that plug into the board, the rest of the electrical connections are made between spring loaded fingers that make contact directly with the board when snapped into place. I used a rubber eraser to carefully polish each one of the fingers and their connections points on the circuit board. I re-installed the board, and the error is gone.
I've had two toners that have done this, they register as used as soon as you turn the dial to open the toner compartment. So if they don't work properly, as soon as you remove them.. you can no longer use them. (they empty contents into the drum).
I got in contact with my supplier and sent them back as faulty cartridges.
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