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MX-M503N  CONSUMABLE PARTS  2 – 1

MX-M503N

Service Manual

 

1

Toner Cartridge (Black)

Toner Cartridge with IC Chip 
(Toner: Net 930g)

x 1

40K

MX-500NT

10

Life: A4/Letter 
6% document

2

Developer (Black)

Developer (Developer: Net 310g)

x 1

150K

200K

MX-500NV

10

3

Drum

OPC Drum

x 1

150K

200K

MX-500NR

10

1

Toner Cartridge (Black)

Toner Cartridge with IC Chip 
(Toner: Net 930g)

x 1

40K

MX-500BT

10

Life: A4/Letter 
6% document

2

Developer (Black)

Developer (Developer: Net 310g)

x 1

150K

200K

MX-500NV

10

3

Drum

OPC Drum

x 1

150K

200K

MX-500NR

10

1

Toner Cartridge (Black)

Toner Cartridge with IC Chip 
(Toner: Net 930g)

x 1

40K

MX-500AT

10

Life: A4/Letter 
6% document

2

Developer (Black)

Developer (Developer: Net 310g)

x 1

150K

200K

MX-500AV

10

3

Drum

OPC Drum

x 1

150K

200K

MX-500AR

10

1

Toner Cartridge (Black)

Toner Cartridge with IC Chip 
(Toner: Net 930g)

x 1

40K

MX-500GT

10

Life: A4/Letter 
6% document

2

Developer (Black)

Developer (Developer: Net 310g)

x 1

150K

200K

MX-500GV

10

3

Drum

OPC Drum

x 1

150K

200K

MX-500GR

10

1

Toner Cartridge (Black)

Toner Cartridge with IC Chip 
(Toner: Net 930g)

x 1

40K

MX-500FT

10

Life: A4/Letter 
6% document

2

Developer (Black)

Developer (Developer: Net 310g)

x 1

150K

200K

MX-500AV

10

3

Drum

OPC Drum

x 1

150K

200K

MX-500AR

10

1

Toner Cartridge (Black)

Toner Cartridge with IC Chip 
(Toner: Net 930g)

x 1

40K

MX-500CT

10

Life: A4/Letter 
6% document

2

Developer (Black)

Developer (Developer: Net 310g)

x 1

200K

MX-500CV

10

3

Drum

OPC Drum

x 1

200K

MX-500CR

10

: '10/Jun/01

MX-M503N  CONSUMABLE PARTS  2 – 2

1

Heat roller kit 
(200K kit)

MX-503HK

Lower heat roller

1

150K

200K

5

Upper separation pawl/pawl spring

4

Lower separation pawl/pawl spring

2

Upper heat roller

1

Upper pressure roller bearing

2

Pressure roller

1

Web roller

1

2

Transfer kit

MX-503TU

Transfer roller

1

150K

200K

10

Discharge plate

1

3

DV seal kit

MX-503DS

DV seal

1

150K

200K

10

DV side seal F/R

1 pair

TN filter UN

2

4

Main charger kit

MX-503MK

Cleaner blade

1

150K

200K

10

Toner reception seal

1

Side seal F/R

1 pair

Drum separation pawl unit

4

MC unit

1

Side sheet F/R for toner reception seal

2

Molt cushion for side seal F/R

2

5

Toner collection box

MX-503HB

Toner collection box

1

80K

5

6

Paper dust 
removing unit

MX-503PD

Paper dust removing unit

1

150K

200K

10

7

Filter kit

MX-503FL

Ozone filter

1

300K

400K

10

8

Staple cartridge

AR-SC2

Staple cartridge

3

5000 times x 3

20

For finisher 
(MX-FN11)

9

Staple cartridge

AR-SC3

Staple cartridge

3

2000 times x 3

40

For saddle stitch 
finisher (MX-FN10)

10

Staple cartridge

MX-SCX1

Staple cartridge

3

5000 times x 3

20

For inner finisher/
saddle stitch finisher 
(MX-FNX9/FN10)

11

Finish stamp 
cartridge

AR-SV1

Finish stamp cartridge

2

—

20

: '10/Jun/01

MX-M503N  CONSUMABLE PARTS  2 – 3

When the developer/drum counter reaches the specified level.
When the developer/drum rpm reaches the specified level.
When either of the above reached the specified level, it is judged
as life end.
In an actual case, when correction or warm-up operation is per-
formed as well as output operation, the developer and the drum
rotates. Therefore, the developer/drum consuming level cannot be
determined only by the copy/print quantity. When, therefore, the
rpm reaches the specified level, it is judged as life end.
To check the drum life, use SIM22-1/22-13.

1

Upper heat roller kit 
(200K kit)

MX-503UH

Upper heat roller

1

150K

200K

10

Upper separation pawl/pawl spring

4

2

Lower heat roller kit 
(200K kit)

MX-503LH

Lower heat roller

1

150K

200K

10

Lower separation pawl/pawl spring

2

3

Web cleaning kit

MX-503WC

Upper pressure roller bearing

2

150K

200K

10

Pressure roller

1

Web roller

1

4

Transfer kit

MX-503TU

Transfer roller

1

150K

200K

10

Discharge plate

1

5

DV seal kit

MX-503DS

DV seal

1

150K

200K

10

DV side seal F/R

1 pair

TN filter UN

2

6

Main charger kit

MX-503MK

Cleaner blade

1

150K

200K

10

Toner reception seal

1

Side seal F/R

1 pair

Drum separation pawl unit

4

MC unit

1

Side sheet F/R for toner reception seal

2

Molt cushion for side seal F/R

2

7

Toner collection box

MX-503HB

Toner collection box

1

80K

5

8

Paper dust 
removing unit

MX-503PD

Paper dust removing unit

1

150K

200K

10

9

Filter kit

MX-503FL

Ozone filter

1

300K

400K

10

10

Staple cartridge

AR-SC2

Staple cartridge

3

5000 times x 3

20

For finisher 
(MX-FN11)

11

Staple cartridge

AR-SC3

Staple cartridge

3

2000 times x 3

40

For saddle stitch 
finisher (MX-FN10)

12

Staple cartridge

MX-SCX1

Staple cartridge

3

5000 times x 3

20

For inner finisher/
saddle stitch finisher 
(MX-FNX9/FN10)

13

Finish stamp 
cartridge

AR-SV1

Finish stamp cartridge

2

—

20

Developer/drum

150K

200K

930K rotations

: '10/Jun/01

MX-M503N  CONSUMABLE PARTS  2 – 4

The lot number is of 10 digits. Each digit indicates the content as
follows.
The number is printed on the flange on the front side.

The lot number is of 8 digits. Each digit indicates the content as fol-
lows.
The number is printed on the right under side of the back surface of
the developer bag.

The label indicating the management number is attached to the
side of the toner cartridge.

1:

Number
For this model, this digit is 2.

2:

Alphabet
Indicates the model conformity code.

3:

Number
Indicates the end digit of the production year. 

4:

Number or X, Y, Z
Indicates the production month.
X stands for October, Y November, and Z December.

5/6:

Number
Indicates the day of the production date.

7:

Number
Indicates the day of the month of packing.
X stands for October, Y November, and Z December.

8/9:

Number
Indicates the day of the packing date.

10:

Alphabet
Indicates the production factory.

1:

Alphabet
Indicates the production factory.

2:

Number
Indicates the production year.

3/4:

Number
Indicates the production month.

5/6:

Number
Indicates the production day.

7:

Hyphen

8:

Number
Indicates the production lot.

1

2

3

4

5

6

7

8

9

10

1

2

3

4

5

6

7

8

BK

Standard environmental 
conditions

Temperature

20 – 25 °C

Humidity

65 

 5 %RH

Usage environmental 
conditions

Temperature

10 – 35 °C

Humidity

20 – 85 %RH 

Storage period

Toner/Developer: 24 months from the 
manufactured month (Production lot) under 
unsealed state
Drum: 36 months from the manufactured month 
under unsealed state

A 3 M X 5 0 0 N T

1

A

0 0 0 0 1

0 9 0 2 1 0

B

B

Internal product name

Destination

Production
place

Production
year/month/day

Version

Serial No.
in production day

Example: 1st of production on February 10, 2009

Incompatibility

85%

60%

20%

10

30

35

(Humidity)

(Temperature)