Sharp MXB401

A. Counter reset

When the drum cartridge, the primary transfer unit, the secondary transfer unit, or the fusing unit is replaced with a new one, the initial detection function operates after turning ON the power to reset each counter automatically.

When the machine is initialized during warming up, or when the simulation is executed or the machine is turned OFF and the door is opened before the machine enters the print (copy) ready state, the initial detection function may not operate normally. Therefore, never execute the simulation or never operate the machine such as turning OFF the machine power and opening the door before the machine enters the print (copy) ready state after replacing one of the above parts and turning ON the power.

When the counter is not automatically reset, it must be reset manually.

Since the maintenance counter (total) is not automatically reset, they must be cleared by executing SIM24-4.

B. Toner density reference control level setting

1. Insert the power plug into a power outlet. With the front cabinet open, turn ON the power switch of the machine and the power switch on the operation panel.
2. With the front cabinet open, enter SIM 25-2. WARNING: Do not install the toner cartridge before completing the Toner density reference control level setting (SIM 25-2).
3. Close the front cabinet.
4. After completion of the adjustment of the toner density control reference value, insert the toner cartridge.
5. When [EXECUTE] key is pressed, it is highlighted. The developing roller rotates, and the toner density sensor detects toner density, and the output value is displayed.
   The above operation is executed for 3 minutes, and the average value of the toner density sensor detection level is set (saved) as the reference toner density control value.
   When the reference toner density control adjustment operation is completed, [EXECUTE] key returns to normal from highlight. This makes known about whether the adjustment operation is completed or not.
6. Press the CA key to exit the simulation.
   NOTE: If the operation is interrupted within 3 minutes, the adjustment result is not reflected.
   When [EXECUTE] key is pressed during rotation, the operation is stopped and [EXECUTE] key returns to the normal display.
   If [EE-EU] or [EE-EL] is displayed, setting of the reference toner density control value is not completed normally.

Error display	Content	Details of content
EE-EL	EL abnormality	Sensor output level less than 67, or sensor control voltage level over 197
EE-EU	EU abnormality	Sensor output level over 154, or sensor control voltage level less than 49
EE-EC	EU abnormality	Sensor output level less than 95, or sensor control voltage level over 105

NOTE:

When not replacing the developer, do not execute SIM25- 2.
Only execute SIM 25-2 when replacing the Developer. SIM 25-2 should only be run immediately after installing new DV material.
Toner Concentration Reference Control Level Setting will be incorrect if SIM 25-2 is performed at any other time.
When SIM25-2 is executed, the counter of the developer unit is reset.

C. Other

Perform the following items of check and work.

• Image skew adjustment (LSU (writing) unit) (SIM61-04)
• Image registration adjustment (SIM50-22)
• Image density sensor (Image registration sensor) adjustment (SIM44-13)
• CCD gamma adjustment (CCD calibration) (SIM63-03) (Execute according to the necessity.)
• Firmware version check (SIM22-05) (Execute according to the necessity.)
• Trouble counter and JAM counter reset (SIM24-01)
• Engine automatic adjustment (SIM46-74)