Ricoh DU5050 Quick start guide

Decurl Unit DU5050
Machine Code:D3DR
Field Service Manual
Ver 1.0
Latest Release: Nov, 2016
Initial Release: Nov, 2016
Copyright (c) 2016 Ricoh Co.,Ltd.

1
Table of Contents
1. Replacement and Adjustment........................................................................................................................................... 2
Decurler Unit and Electrical Components ............................................................................................................................ 2
Decurl Unit......................................................................................................................................................................... 2
DDRB.................................................................................................................................................................................. 5
Decurl Unit Motor ............................................................................................................................................................. 6
Decurl Unit Fan.................................................................................................................................................................. 7
Decurl Feed Motor............................................................................................................................................................ 8
Decurl Unit HP and Limit Sensor.....................................................................................................................................10
2. Detailed Descriptions......................................................................................................................................................12
Detailed Descriptions...........................................................................................................................................................12
Specifications ..................................................................................................................................................................12
Decurl Unit Operation ....................................................................................................................................................12
Decurl Unit Movement....................................................................................................................................................13

1.Replacement and Adjustment
2
1.
Replacement and Adjustment
Decurler Unit and Electrical Components
Decurl Unit
Removal Procedure
•Most parts in the decurl unit have been precisely adjusted at the factory. Do not remove the parts for which
replacement procedures are not mentioned in this manual. Otherwise, adjustment for the decurl unit requires
special tools.
Only the following parts can be replaced without decurl unit adjustment.
•DDRB (Decurl Drive Board)
•Decurl Unit Motor
•Decurl Feed Motor
•Decurl Unit HP and Limit Sensor
•Decurl Unit Fan
1. Remove the left cover of the main machine ( x7)
2. Disconnect the DDRB ( x3).

1.Replacement and Adjustment
3
3. Remove the lower bracket ( x2).
4. Remove the decurl unit ( x4).
Maintenance Position
Lay the Decurl Unit [A] on temporary supports [B].
•The entrance guide of the decurl unit must not touch the floor or any object. Otherwise, the mylars on the entrance
gate may be bent or folded.
•Keep this position during maintenance.
•Place an object like a sheet of cardboard on the supports so that the frame projection [C] does not damage the

1.Replacement and Adjustment
4
supports.
SP Settings After Installing a New Decurl Unit
1. Switch on the machine and enter the SP mode.
2. Refer to the accessory sheet and enter the settings for SP1927 and SP1928.
3. Exit SP mode and turn off the main machine.

1.Replacement and Adjustment
5
DDRB
1. Remove the left cover of the machine ( x7).
2. Disconnect the DDRB ( x4).
3. Remove the DDRB ( x4).

1.Replacement and Adjustment
6
Decurl Unit Motor
1. Remove the decurl unit (Decurl Unit)
2. Remove the decurl unit cover bracket ( x2)
3. Disconnect the fan bracket [A] and free the harness so that you can move it to access the motor ( x1, x3).
4. Disconnect the connector and remove the belt ( x1, x1).

1.Replacement and Adjustment
7
5. Remove the motor bracket (with motor attached) ( x2).
6. Separate the motor and bracket ( x1, x2).
Decurl Unit Fan
1. Remove the decurl unit. (Decurl Unit)
2. Remove the decurl unit cover bracket ( x2)

1.Replacement and Adjustment
8
3. Disconnect the fan harness ( x2, x1).
4. Remove the fan bracket [A] (with fan attached) ( x1).
5. Separate the fan [B] and bracket ( x2).
Decurl Feed Motor
1. Remove the decurl unit. (Decurl Unit)
2. Remove the decurl unit cover bracket ( x2)