M4 It is not copy aand show in scream code M4

Code C2558 Description Abnormally high toner density detected TCR sensor
• TC ratio in the developing unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively. Remedy 1 Make sure that the following counter is cleared at the developer replacing. [Service Mode] - [Counter] - [Life] - [Developer Use Time] 2 Perform image troubleshooting procedure if image density is low. 3 Reinstall developing unit. 4 Reinstall toner bottle. 5 Check the contact of developing unit for proper connection and correct as necessary. 6 Check the connector between TCRSB CN29-relay CN28-PRCB CN24 for proper connection and correct as necessary. 7 Check the connector between M3-PRCB CN8 for proper connection and correct as necessary. 8 Check the connector between M4-relay CN13-PRCB CN8 for proper connection and correct as necessary. 9 M3 operation check. 10 M4 operation check. 11 Change developing unit. 12 Change TCRSB. 13 Change PRCB.

Service mode, first

1.Press the Utility key.
2. Press the Meter Count key.
3. Press the following keys in this order:
Stop  0  0  Stop  0  1

for security "Stop 9"

In Security, Select Copy Kit
1. Touch "Set."
2. Press the Clear key to clear the current setting.
If the setting is accidentally cleared, press the Interrupt key to
undo the clearing operation.
3. Enter the desired value from the 10-Key Pad.
4. Touch "Current."
5. Press the Clear key to clear the current value.
If the current value is accidentally cleared, press the Interrupt key
to undo the clearing operation.

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m4 = maintenance counter 4 reset

stop 0 stop1 sets the machine service mode. select consumable clear the copy kit counter

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Google search "P4M900-M4 motherboard wiring diagram" it should show you the pin outs.

hi! here's the link! just copy and paste it on your address bar. http://driverscollection.com/?file_cid=3929079359753eefd6f8d7d1f22 just enter the code from the image then click on download file. hope it works :)

This M4 code means that your drum life is over. You have run 80,000 copies or more on the drum. If you have a local service company available then I would just have them come out and clean the machine and reset the counter. This is especially true if your copies were still fine prior to the machine shutting down. Service mode entry and navigation is rather complicated on this machine so I do not feel comfortable trying to walk you thru the reset process.
Good Luck and Thank You for using Fixya.

This means that the drum has reached it life count of 80,000 copies. If your copies are good and the machine is still making copies the you can just ignore the M4 as if you are in the USA then the factory settting allows you to continue making copies. If the M4 appeared and you can NOT make copies then you will need to get into the service mode to turn the disable copy feature off or reset the count for the drum unit. Just let me know what your situation is and if need be we can walk you thru the reset. I just don't recommend this action unless it is absolutely necessary.

QUEL EST LA SOLUTION POUR DESACTIVER L'ERREUR CODE M4 ?

1. A fan irregularity signal, excessive current draw due to binding. Examine M4 for obstructions which may bind the fan. Check the M4 fan lock signal (main CB, CN26-4) in the 47 mode, input code 42. The voltage should be between 0.1 to 0.2V DC. If 5V DC is present, either the fan is binding or the fan is defective. Replace M4 (p/n 25HA80512).
Note: If the fan lock signal is normal, install the version 17.0 EPROM (p/n 101517-17.0) to prevent false F54 errors as outlined in 1015/1212 Technical Bulletin #15.

2. IC7 on the main CB has shorted due to a failed total counter. IC7 shares the 24V DC control signal line with the exposure lamp, separation solenoid (SD1), registration solenoid (SD2), total counter, key counter, and cooling fan (M4). All loads except the total counter operate in diagnostics.
Replace the total counter (p/n 466088201) and the main CB (p/n 25HE-7312).

3. A poor connection between the cooling fan (M4) and the main CB. Reseat CN73 at M4 (cooling fan) and CN26 on the main CB.