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AR-M550/M620  DETAILS OF EACH SECTION  6 - 138

1) Remove the main motor. (See “a-1. Main motor”  in the “[Paper

feed/paper transport drive section]”)

2) Remove the high voltage PWB unit. (See “a. Manual paper feed

drive unit” in the “[Manual paper feed drive section]”)

3) Pull out the left door.

4) Disconnect the connector and remove the harness clamp. Remove

the DV fan unit.

5) Disconnect the connector and remove the harness holder.

6) Remove the plastic E-ring, the belt holding sheet, the belt, and the

pulley. Remove the joint plate.

∗

When installing, be careful of the direction of the belt holding sheet.

7) Remove the harness, and remove the drive joint plate.

∗

When installing, temporarily fix the 1/2 paper feed drive unit to the
main unit, and install the drive joint plate. Then tighten the screw of
the drive unit securely.

8) Disconnect the connector and remove the harness clamp. Remove

the 1/2 paper feed drive unit.

∗

Remove the screw which was indicated with the arrow mark.

1) Remove the 1/2 paper feed drive unit. (See “a. 1/2 paper feed drive

2) Loosen the screw to release the tension, and remove the belt.

3) Remove the parts.

AR-M550/M620  DETAILS OF EACH SECTION  6 - 139

4) Remove the 1/2 paper feed drive frame lower. Remove the har-

ness clamp.

5) Disconnect the connector, and remove the vertical paper transport

motor.

1) Remove the 1/2 paper feed drive unit. (See “a. 1/2 paper feed drive

2) Remove the 1/2 paper feed drive frame lower. (See “a-1. Vertical

3) Disconnect the connector and remove the harness lamp, and

remove the paper feed tray 3/4 and the paper transport clutch 2
unit.

4) Remove the E-ring, and remove the paper feed tray 3/4 and the

paper transport clutch 2.

1) Remove the 1/2 paper feed drive unit. (See “a. 1/2 paper feed drive

2) Remove the 1/2 paper feed drive frame lower. (See “a-1. Vertical

3) Disconnect the connector and remove the harness lamp, and

remove the paper feed clutch unit.

4) Remove the E-ring, and remove the paper feed clutch.

AR-M550/M620  DETAILS OF EACH SECTION  6 - 140

1) Remove the 1/2 paper feed drive unit. (See “a. 1/2 paper feed drive

2) Remove the 1/2 paper feed drive frame lower. (See “a-1. Vertical

3) Disconnect the connector and remove the harness clamp, and

remove the horizontal paper transport clutch unit.

4) Remove the E-ring, and remove the horizontal paper transport

clutch 2.

1)  Remove the 1/2 paper feed drive unit. (See “a. 1/2 paper feed

2) Remove the 1/2 paper feed drive frame lower. (See “a-1. Vertical

3) Disconnect the connector and remove the harness lamp, and

remove the paper feed clutch unit.

4) Remove the E-ring, and remove the paper feed clutch.

1) Remove the 1/2 paper feed drive unit. (See “a. 1/2 paper feed drive

2) Remove the 1/2 paper feed drive frame lower. (See “a-1. Vertical

3) Remove the paper pickup solenoid unit.

4) Remove the paper pickup solenoid.

∗

When installing, check that the solenoid plunger is inserted in the
arm.

AR-M550/M620  DETAILS OF EACH SECTION  6 - 141

1) Remove the rear cabinet.

2) Remove the plastic E-ring, the belt holding sheet, the belt, and the

pulley.

∗

When installing, be careful of the direction of the belt holding sheet.

3) Disconnect the connector, and remove the lift-up motor unit.

4) Release the pawl, and remove the lift-up coupling. Remove the lift-

up spring from the paper tray lift-up motor.

1) Remove the high voltage PWB unit. (See “a. Manual paper feed

drive unit” in the “[Manual paper feed drive section]”)

2) Disconnect the connector, and remove the lift-up motor unit.

3) Release the pawl, and remove the lift-up coupling. Remove the lift-

up spring from the lift-up motor.

1) Remove the high voltage PWB unit. (See “a. Manual paper feed

drive unit” in the “[Manual paper feed drive section]”)

2) Disconnect the connector, and remove the paper pickup solenoid

unit. 

3) Remove the paper pickup solenoid.

∗

When installing, check that the solenoid plunger is inserted in the
arm.