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MX-C300P  MAINTENANCE  9 – 2

A message of maintenance timing is displayed when each counter reaches the set value.
The relationship between the kinds of messages and the counters is shown below.
The display contents marked with [  ] are displayed in a window appearing at the center of the LCD.

- After execution of maintenance, execute SIM24-4 to clear the maintenance counter (total) and the maintenance counter (color).
- When the maintenance counter (total) and the maintenance counter (color) are cleared, the above display disappears.

- After execution of maintenance, execute SIM24-4 to clear the maintenance counter.
- The above display disappears by cleaning the counters.

- If a sub part is used to execute the maintenance or if the above guidance does not disappear when the whole fusing unit is replaced, SIM24-

4 must be executed to clear each counter of the fusing unit. (the accumulated traveling distance counter, the accumulated rotation number
counter, and the usage day counter)

- The above display disappears when the counters are cleared.

For KCMY only the life end cartridge code is displayed.

- After execution of maintenance, execute SIM24-4 to clear the maintenance counter.
- When the black drum cartridge does not reach the life end and only the color drum cartridge reaches the life end, black/white print can be

performed but color print cannot be performed. 

- When the drum cartridge is replaced with a new one, the print counter, the accumulated traveling distance counter, the accumulated rotation

number counter, and the usage day counter are automatically cleared, and the above display disappears.

- The above display disappears when the counters are cleared.

(Maintenance required.Code:TA)

0 (Print continue)

Maintenance counter (Total)

When the Sim21-1 set value is reached

Enable

1 (Print stop)

When 90% of the Sim21-1 set value is reached

[Maintenance required. Code: TA]

1 (Print stop)

When the Sim21-1 set value is reached

Disable

(Maintenance required.Code:CA)

0 (Print continue)

Maintenance counter (Color)

When the Sim21-1 set value is reached

Enable

1 (Print stop)

When 90% of the Sim21-1 set value is reached

[Maintenance required. Code: CA]

1 (Print stop)

When the Sim21-1 set value is reached

Disable

[Maintenance required.Code:TK]

0 (Print continue)

Primary transfer unit print 
counter

When 150K is reached

Enable

1 (Print stop)

[Maintenance required.Code:FK]

0 (Print continue)

Fusing unit print counter 

When 150K is reached

Enable

1 (Print stop)

[Maintenance required.
Code:DK]

0 (Print continue)

Drum cartridge print counter (K), 
Drum cartridge accumulated rotation number (K)

When 100K(Other countries 
than China) or 75K(China)  is 
reached.  
 When 575K rotations is 
reached.  

Enable

1 (Print stop)

[Maintenance required.
Code:D(C/M/Y]

0 (Print continue)

Drum cartridge print counter (C/M/Y)
Drum cartridge accumulated rotation number (C/
M/Y)

When 60K(Other countries than 
China) or 45K(China)  is 
reached.  
 When 575K rotations is 
reached.  

Enable

1 (Print stop)

MX-C300P  MAINTENANCE  9 – 3

For CMYK only the life end cartridge code is displayed.

-  When the black drum cartridge does not reach the life end and only the color drum cartridge reaches the life end, black/white print can be 

performed but color print cannot be performed.

- When the developer cartridge is replaced with a new one, execute SIM24-5 to clear the print counter, the accumulated traveling distance

counter and the usage day. 

- If the above guidance does not disappear when the developer cartridge is replaced, the initial setting of the toner density must be executed

with the simulation, and the auto color calibration must be executed.

- When the initial setting of the toner density is executed, the counters are cleared and the above display disappears.

For KCMY only the life end cartridge code is displayed.

-  Detected by the toner motor rotation number and the pixel count (The value of larger life percentage is employed.)
   Since the life of the toner cartridge which is packed when shipping from the factory is 1.0K, the remaining quantity of the toner cartridge, 
   though it is a new one, is displayed as 25-50%.
- Selection of Display/Not Display can be made with Sim26-69. (Default: Not Display)
- When the black toner cartridge does not reach the life end and only the color toner cartridge reaches the life end, black/white print can be 
  performed but color print cannot be performed.

When the Toner collection container is replaced, the display disappears.

[Maintenance required.
Code:VK]

0 (Print continue)

Developer cartridge print counter (K)
Developer cartridge accumulated rotation number (K)

When 100K(Other countries 
than China) or 75K(China)  is 
reached.  
 When 575K rotations is 
reached.  

Enable

1 (Print stop)

[Maintenance required.
Code:V(C/M/Y)]

0 (Print continue)

Developer cartridge print counter (C/M/Y)
Developer cartridge accumulated rotation number (C/
M/Y)

When 60K(Other countries than 
China) or 45K(China)  is 
reached.  
 When 575K rotations is 
reached.  

Enable

1 (Print stop)

(K/C/M/Y) Prepare a toner
Near near end

No relation

Toner motor rotation time

Specified time of 
rotations

Enable

(K/C/M/Y) Toner supply is low
Near end

No relation

Toner supply amount is 
decreasing.

ATC sensor output 
variation

Enable

Replace the toner cartridge. (K) 
(End)

0 (Print continue)

The pixel count from near end 
reaches the specified value.

Specified pixel count

(Disable for a JOB which 
requires K toner)

1 (Print stop)

Replace the toner cartridge. (C/M/
Y) (End)

0 (Print continue)

The pixel count from near end 
reaches the specified value.

Specified pixel count

Enable for monochrome, 
Disable for color

1 (Print stop)

Replace Toner collection 
container.

0 (Print continue)

When the waste toner full detection switch is ON for 
1000ms.

Enable

1 (Print stop)

Replace Toner collection 
container.

0 (Print continue)

When 10450 count is reached from the near end detec-
tion.  

Disable

1 (Print stop)

No

No relation

Ozone filter counter

When 75K rotations is 
reached.  

Enable

MX-C300P  MAINTENANCE  9 – 4

✕: Check (Clean, replace, or adjust according to necessity.) O: Clean S: Replace U: Adjust ✩: Lubricate

OPC drum section

OPC drum unit (mono-
chrome)

 - 

 - 

S

 - 

 - 

S

 - 

S

 - 

S

OPC drum unit (color)

 - 

S

 - 

S

S

 - 

S

S

S

 - 

Developing section

Developing unit (mono-
chrome)

 - 

 - 

S

 - 

 - 

S

 - 

S

 - 

S

Developing unit (color)

 - 

S

 - 

S

S

 - 

S

S

S

 - 

Toner cartridge

Toner cartridge BK

User replacement for every toner empty.

Toner cartridge CMY

User replacement for every toner empty.

Toner collection 
container

Toner collection con-
tainer

Replaced by the user when full is detected.

Transfer 
section

Primary
transfer unit

Primary transfer unit

X

 

- 

S

 - 

S

Replace at 150K or 2 year of use.

Secondary 
transfer unit

Secondary transfer roller

X

 

- 

O

 

- 

O

Replace as needed

LSU section LSU

Dust-proof glass

X

X

X

X

X

Others

LSU cleaning unit

X

S

S

S

S

Replace as needed

Paper feed 
section

Manual
paper feed 
unit/Tray 
paper feed 
unit

Paper feed roller

X

O

O

O

O

Replace at 100K of each counter or 1 year 
of use. 

Separation roller

X

O

O

O

O

Torque limiter

X

O

O

O

O

Sensors

X

X

X

X

X

Paper regis-
tration
section 
(paper
transport 
section)/
Paper exit 
section/
ADU
section

PS auxilrary roller

X

O

O

O

O

Transport rollers

X

O

O

O

O

Paper guides

O

O

O

O

O

Discharge brush

X

X

X

X

X

Gears

X

X

X

X

X

Apply to the specified area when checking. 
FLOIL GE-676

Paper dust removing unit

Drive sec-
tion

Gears (grease)

X

X

X

X

X

Apply to the specified area when checking. 
FLOIL G-313S

Shaft earth sections
conduction grease

X

X

X

X

X

Apply to the specified area when checking. 
FLOIL GE-676

Belts

X

X

X

X

X

Sensors

X

X

X

X

X

Fusing sec-
tion

Fusing unit

Fusing unit

X

 

- 

S

 - 

S

Replace at 150K or 2 year of use.

Other

Process registration sensor 

X

O

O

O

O

Clean when the Fusing unit and the Drum 
cartridge is replaced.  

Ozone filter

X

S

S

S

S

Replace at 75K  

MX-CS11

Pick-up roller

O

O

O

O

O

When the paper feed counter reaches a value 
of 100K or when one year has elapsed since 
the start of use.

Paper feed roller

O

O

O

O

O

Separation roller

O

O

O

O

O

Torque limiter

X

X

X

X

X

Transport rollers

X

O

O

O

O

Transport paper guides

O

O

O

O

O

Discharge brush

X

X

X

X

X

Gears

X

X

X

X

X

Apply to the specified area when checking. 
FLOIL GE-676

MX-C300P  MAINTENANCE  9 – 5

✕: Check (Clean, replace, or adjust according to necessity.) ۑ : Clean S: Replace U: Adjust ✩: Lubricate

1

Developing unit (monochrome)

 - 

 - 

S

 - 

 - 

S

 - 

S

 - 

S

Developing unit (color)

 - 

S

 - 

S

S

 - 

S

S

S

 -