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AR-M550/M620  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 - 20

No.

Name

Function/Operation

MODEL

 NOTE

1

Switchback gate

Selects the paper route when discharging paper to the inner tray and 
when switching back. 

Switched not by the solenoid drive 
but by the automatic procedure.

2

Paper exit gate

Selects the paper route to transport paper to the duplex (ADU) 
section or to discharge paper.

Driven by the solenoid (DGS).

3

Manual feed gate

Specifies the lead edge position of paper when setting paper. 
(Prevention against double feed, and erroneous take-up of all paper 
into the paper feed roller)

Code

Name

Type

Function/Operation

MODEL

NOTE

HL1

Heater lamp 1

Halogen lamp

Heats the center of the upper fusing 
roller.

 

HL2

Heater lamp 2

Halogen lamp

Heats the both ends of the upper 
fusing roller.

 

HL3

Sub heater lamp

Halogen lamp

Heats the fusing roller (pressing 
roller).

2

3

1

1

7
5

6

2

3

AR-M550/M620  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 - 21

WH1 DESK

Dry heater (Paper 
feed tray 1, 2)

Nichrome wire 
(18W)

Dehumidifies paper on the paper 
fee4d tray 1 and 2.

Standard for Japan model, option 
for the other destinations.

WH1 SCN

Scanner dry heater

Nichrome wire (7W)

Dehumidifies the scanner section.

Standard for Japan model, option 
for the other destinations.

WH2 DESK

Dry heater (Paper 
feed tray 3, 4)

Nichrome wire 
(10W)

Dehumidifies paper on the paper 
feed tray 3 and 4.

Standard for Japan model, option 
for the other destinations.

No.

Name

Function/Operation

 MODEL

 NOTE

1

Scanner lock screw

Locks the scanner. (Protects the scanner unit from 
breakage during transit.)

Bu sure to lock during transit.

2

Paper tray 1 lock block

Locks the paper lift plate

3

Paper tray 2 lock block

Locks the paper lift plate

4

Paper tray 3 lock block

Locks the paper lift plate

5

Paper tray 4 lock block

Locks the paper lift plate

 

6

Fusing pressure release screw

Apply and release a pressure to/from the fusing roller.

Release a pressure when 
storing for a long time.

7

OPC drum separation pawl lock block

Protects the OPC drum from contact with the separation 
pawl.

Code

Name

Type

Function/Operation

MODEL

NOTE

1

6

7

2

4

5

3

AR-M550/M620  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 - 22

No.

Name

Function/Operation

MODEL

NOTE

1

Paper feed roller (Manual paper feed tray)

Feeds paper to the paper transport section.

2

Separation roller (Manual paper feed tray)

Separates paper to prevent against double-feed.

3

Paper pickup roller (Manual paper feed tray)

Sends paper to the paper transport section.

4

Paper feed roller (No. 1 paper feed tray)

Feeds paper to the paper transport section.

5

Paper pickup roller (No. 1 paper feed roller)

Sends paper to the paper transport section.

6

Separation roller (No. 1 paper feed tray)

Separates paper to prevent against double-feed.

7

Paper feed roller (No. 2 paper feed tray)

Feeds paper to the paper transport section.

8

Separation roller (No. 2 paper feed tray)

Separates paper to prevent against double-feed.

9

Paper pickup roller (No. 2 paper feed roller)

Sends paper to the paper transport section.

10

Paper feed roller (No. 3 paper feed tray)

Feeds paper to the paper transport section.

11

Separation roller (No. 3 paper feed tray)

Separates paper to prevent against double-feed.

12

Paper pickup roller (No. 3 paper feed roller)

Sends paper to the paper transport section.

13

Paper feed roller (No. 4 paper feed tray)

Feeds paper to the paper transport section.

14

Separation roller (No. 4 paper feed tray)

Separates paper to prevent against double-feed.

15

Paper pickup roller (No. 4 paper feed roller)

Sends paper to the paper transport section.

16

Resist roller (Drive)

Transports paper to the transfer section. / Controls the paper 
transport timing and adjusts the relative relationship between 
the image and paper.

1

2

3

7
8 

9 

19

18

21

20

23

22

24
25
12
 
11

10

4
6

17
16

37 

38

39

40

41

52

53

54 

42

43

50
51

48
49
59
60 

65 

63 

62 

64

61

5

15

13

14

27

26

28 

30 

29 

31 32

34 35  33

36 

55

44

57

58

46

47

56

45

77

78

76 75 74 73 

66

68

67 71

72

69

70 

AR-M550/M620  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 - 23

17

Resist roller (Idle)

Applies a pressure to paper and the resist roller to provide a 
transport power of the transport roller to paper. 

18

Transport roller 1B (Drive)

Transports paper fed from the large capacity tray (LCC) to the 
transport roller 2.

19

Transport roller 1B (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

20

Transport roller 2 (Drive)

Transports paper transported from the manual paper feed and 
the transport roller 1 to the transport roller 3.

21

Transport roller 2 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

22

Transport roller 3 (Drive)

Transports paper transported from the paper teed tray 2 and 
the transport roller 2 to the transport roller 3.

23

Transport roller 3 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

24

Transport roller 4 (Drive)

Transports paper transported from the transport roller 3 to the 
transport roller 15.

25

Transport roller 4 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

26

Transport roller 5 (Drive)

Transports paper fed from the paper feed tray 4 to the 
transport rollers 6 and 7.

27

Transport roller 5 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

28

Transport roller 6 (Idle)

Reduces friction between paper and the paper guide. 

29

Transport roller 7 (Drive)

Transports paper transported from the transport roller 5 to the 
transport roller 10.

30

Transport roller 7 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

31

Transport roller 8 (Drive)

Transports paper transported from the paper feed tray 3 to the 
transport rollers 9 and 10. 

32

Transport roller 8 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

33

Transport roller 9 (Idle)

Reduces friction between paper and the paper guide. 

34

Transport roller 10 (Drive)

Transports paper transported from the transport rollers 7 and 
8 to the transport roller 11.

35

Transport roller 10 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

36

Transport roller 11 (Drive)

Transports paper transported from the transport roller 10 to 
the transport roller 13. 

37

Transport roller 11 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

38

Transport roller 12 (Idle)

Reduces friction between paper and the paper guide. 

39

Transport roller 13 (Drive)

Transports paper fed from the paper feed trays 1, 3, and 4 to 
toe transport roller 15. 

40

Transport roller 13 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

41

Transport roller 14 (Idle)

Reduces friction between paper and the paper guide. 

42

Transport roller 15 (Drive)

Transports paper to the transport resist roller.

43

Transport roller 15 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

44

Transport roller 16 (Drive)

Transports paper from the fusing roller to the paper exit roller 
1. 

45

Transport roller 16 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

46

Transport roller 17 (Idle)

Reduces friction between paper and the paper guide. 

47

Transport roller 18 (Idle)

Reduces friction between paper and the paper guide. 

48

Transport roller 19 (Drive)

Transports paper transported from the paper exit roller 2 to 
the transport roller 20.

49

Transport roller 19 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

50

Transport roller 20 (Drive)

Transports paper transported from the transport roller 19 to 
the transport roller 21.

51

Transport roller 20 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

52

Transport roller 21 (Drive)

Transports paper transported from the transport roller 20 to 
the transport roller 15.

53

Transport roller 21 (Idle)

Applies a pressure to paper and the transport roller to provide 
a transport power of the transport roller to paper. 

No.

Name

Function/Operation

MODEL

NOTE