Toshiba MD-0101 User manual

AUTOMATIC DUPLEXING UNIT
MD-0101
File No.31100018

General Precautions for Installation/Servicing/Maintenance for the MD-0101
The installation and service should be done by a qualified service technician.
1. When installing the MD-0101 to the Plain Paper Copier, be sure to follow the instructions described in
the “Unpacking/Set-Up Procedure for the MD-0101” booklet which comes with each unit of the
MD-0101.
2. The MD-0101 should be installed by an authorized/qualified person.
3. Before starting installation, servicing or maintenance work, be sure to turn off and unplug the copier
first.
4. When servcing or maintaining the MD-0101, be careful about the rotating or operation sections such
as gear, pulleys, sprockets, cams, belts, etc.
5. When parts are disassembled, reassembly is basically the reverse of disassembly unless otherwise
noted in this manual or other related materials. Be careful not to reassemble small parts such as
screws, washers, pins, E-rings, toothed washers to the wrong places.
6. Basically, the machine should not be operated with any parts removed or disassembled.
7. Delicate parts for preventing safety hazard problems (such as breakers, thermofuses, fuses, door
switches, sensors, etc.if any) should be handled/installed/adjusted correctly.
8. Use suitable measuring instruments and tools.
9. During servicing or maintenance work, be sure to check the serial No.plate and other cautionary
labels (if any) to see if they are clean and firmly fixed.If not, take appropriate actions.
10. The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband,
because the ICs on it may be damaged due to static electricity.Before using the wrist band, pull out
the power cord plug of the copier and make sure that there is no uninsulated charged objects in the
vicinity.
11. For the recovery and disposal of used MD-0101, consumable parts and packing materials, it is
recommended that the relevant local regulations/rules should be followed.
12. After completing installation, servicing and maintenance of the MD-0101, return the MD-0101 to its
original state, and check operation.
Copyright 2000
TOSHIBA TEC CORPORATION

October 2000 © TOSHIBA TEC 1 MD-0101 CONTENTS
CONTENTS
1. SPECIFICATIONS ...................................................................................................... 1-1
2. OUTLINE .................................................................................................................... 2-1
2.1 Names ofVarious Components......................................................................................... 2-1
2.2 Layout of Electrical Parts.................................................................................................. 2-2
2.3 Harness Connection Diagram............................................................................................ 2-3
2.4 Board Assembly ............................................................................................................... 2-4
3. OPERATIONAL DESCRIPTION................................................................................ 3-1
3.1 GeneralOperation ............................................................................................................. 3-1
3.2 Block Diagram .................................................................................................................. 3-1
3.3 Detection of Abnormal Status ........................................................................................... 3-2
3.3.1 Cover open/close detection.................................................................................... 3-2
3.3.2 Paper jam detection ............................................................................................... 3-2
3.4 FlowChart ........................................................................................................................ 3-3
4. MECHANICAL DESCRIPTION.................................................................................. 4-1
4.1 Paper Feed System .......................................................................................................... 4-1
4.2 Drive System .................................................................................................................... 4-2
5. CIRCUIT DESCRIPTION ........................................................................................... 5-1
5.1 PWA Block Diagram ......................................................................................................... 5-1
5.2 Meaning of Signals ........................................................................................................... 5-2
5.3 Timing Chart ..................................................................................................................... 5-3
6. DISASSEMBLY AND REPLACEMENT..................................................................... 6-1

October 2000 © TOSHIBA TEC 1 - 1 MD-0101 SPECIFICATION
1. SPECIFICATIONS
Function : Stackless unit for duplex printing
Paper : Size A3 to A5-R/LD to ST-R
: Thickness Normal paper 64 to 80g/m2(17 to 21 lbs)
Transport speed : 92 mm/sec. (DP1600)
: 124 mm/sec. (DP2500)
Dimensions : 101 (W) x 488 (D) x 345 (H) mm
Weight : Approx. 4.3 kg
Power supply : 5VDC, 24VDC (Supplied from copier)

October 2000 © TOSHIBA TEC 2 - 1 MD-0101 OUTLINE
2. OUTLINE
2.1 Names ofVarious Components
ADU 02-01-01
ADU 02-01-02
ADU paper guide assembly
Release lever
ADU release hook F
ADU release hook R
Connection cable

MD-0101 OUTLINE 2 - 2 October 2000 © TOSHIBA TEC
2.2 Layout of Electrical Parts
SEN1
SEN2
SW1
M2
M1
ADU (PWA-F-ADU)
ADU 02-02-01
Symbols and functions of various devices
Name
FED1-SEN
ADU paper jam sensor (Lower)
FED2-SEN
ADU paper jam sensor (Upper)
ADUCOV-SW
ADU cover open switch
FED1-MOT
ADUmotor (Lower)
FED2-MOT
ADUmotor (Upper)
PWA-F-ADU
ADU PWA
Function
Detects the transport of paper (Lower).
Detects the transport of paper (Upper).
Detection of cover open/close status during jam
processing, etc.
Drives the roller to transport paper (Lower).
Drives the roller to transport paper (Upper).
PWA which relays the sensor signals and drives
the motor.
Symbol
SEN1
SEN2
SW1
M1
M2
ADU

October 2000 © TOSHIBA TEC 2 - 3 MD-0101 OUTLINE
2.3 Harness Connection Diagram
PFC PWA
DPF
GND
VCC
CN214
1 2 3
EXMA
+24V
EXMC
EXMB
EXMD
CN216
1 2
GND
CVSW
CN217
1 2 3 4 5
1 2 3 4 5
ADU paper jam sensor
(Lower)
ADU paper jam sensor
(Upper)
CN312 CN328
3 2 1
3 2 1
ADU cover open switch
CN311
2 1
ADU PWA
CN203 CN211
FDM-B
FDM-D 1
2
FDM-A
FDM-C 3
4
ADUFL
CRT-DOWNA 5
6
GND
VDD 7
8
ADCNT 9
10ADUFU
1 2 3 4 5 6 7 8 9
10
ADUCOVSW 11
12EXM-A
EXM-C 13
15EXM-D 14EXM-B
11 12
CN323
1 2 3 4 5 6 7 8 9
10 11 12 13 15 14
15 14 13 12 11 10
9 8 7 6 5 4 3 1 2
15 14 13 12 11 10
9 8 7 6 5 4 3 1 2
CN204 CN212
GND GND 1
2
+24V +24V 3
4
1 2 3 4
CN324
4 3 2 1
1 2 3 4
4 3 2 1
DPF
GND
VCC
CN213
1 2 3
ADU motor
(Upper)
FDMA
+24V
FDMC
FDMB
FDMD
CN215
1 2 3 4 5
1 2 3 4 5
ADU motor
(Lower)
ADU
ADU 02-03-01

MD-0101 OUTLINE 2 - 4 October 2000 © TOSHIBA TEC
2.4 Board Assembly
3
61
IC1
1
2
STK672-210 STK672-210
12
1
112
1
C7 C8
JP10
JP8
JP9 C6
C2
JP7
JP5
JP6
C3
C5
JP2
C1
R1
C4
JP1 JP3 JP4 IC2
CN215 CN213 CN217
CN211
CN214 CN216
CN212
> PF-WP <
15
R14
R2
R4
R3
R5 R9
R6
1
R7
R8 R15
R16
R17
R10
R11
R12
R13
PWB-F-ADU-520-3 41316208000
31
6
41
1
RV
PD
JP11
ADU 02-04-01

October 2000 © TOSHIBA TEC 3 - 1 MD-0101 OPERATIONAL DESCRIPTION
3. OPERATIONAL DESCRIPTION
3.1 General Operation
The ADU is a unit which turns over printed paper. Installation of the unit enables duplex printing on paper.
No paper can be stacked in the ADU.
3.2 Block Diagram
The ADU has three sensors and two motors as shown above. One-side-printed paper passes through the
ADU unit to be turned over and returned to the copier. The motor drive circuits (IC1, IC2) only are installed
on the ADU PWA.
The motor signals (EXM-A - D, FDM-A - D) are amplified by IC1 and IC2 and drive the motors. The signal
of each sensor passes through the ADU PWA and is connected as it is to the PFC PWA.
+24V
ADUFL
ADU
PWA
ADU paper jam sensor (Lower)
ADUFU
ADU paper jam sensor (Upper)
ADUCOVSW
ADU cover open switch
FDMA-D
ADU
EXMA-D
PFC
PWA
ADU motor (Lower)
M
ADU motor (Upper)
M
CN203 CN211CN212
CN204
CN215
CN216CN213CN214CN217
ADU 03-02-01

MD-0101 OPERATIONAL DESCRIPTION 3 - 2 October 2000 © TOSHIBA TEC
3.3 Detection of Abnormal Status
3.3.1 Cover open/close detection
When the ADU cover open sensor detects the open state of the cover, the detection signal is sent to the
copier to stop the transport of paper.
3.3.2 Paper jam detection
When the one-side-printed paper is loaded into the ADU, the ADU paper jam sensors (upper/lower) turn ON
(at“High”level) for a fixed time. If the ADU paper jam sensors (upper/lower) do not turn ON or their ON time
is too long, the program will judge it to be paper jamming and stop the operation. The paper jamming can
be cleared by opening the ADU and removing the paper.

October 2000 © TOSHIBA TEC 3 - 3 MD-0101 OPERATIONAL DESCRIPTION
3.4 Flow Chart
Start button ON
End
YES
All scanning?
Cassette feed
Scanning of document
NO
YES
Final copy
Copy
Transport to ADU
Feed from ADU
Copy
Ejection
NO
Change of document
Start button ON
ADU 03-04-01

October 2000 © TOSHIBA TEC 4 - 1 MD-0101 MECHANICAL DESCRIPTION
4. MECHANICAL DESCRIPTION
4.1 Paper Feed System
The ADU has one transport path as shown above and paper enters the ADU from the top and comes out
from the bottom. Paper is not stacked in the ADU but the ADU only transports the paper by using the two
motors.
Flow of Paper
The flow of paper is as follows:
The one-side-printed paper reversed at the exit unit.
The roller in the exit unit reversely turns to draw the paper into the ADU.
The paper having passed through the ADU is loaded again into the copier from the bottom of the ADU.
Printing takes place on the back of the paper and the paper is ejected.
ADU 04-01-01
ADU 04-04-02
Exit roller
ADU paper jam sensor (Upper)
ADU
ADU paper jam sensor (Lower)
Copier
Flow of paper

MD-0101 MECHANICAL DESCRIPTION 4 - 2 October 2000 © TOSHIBA TEC
4.2 Drive System
In the ADU, paper is transported by two pulse motors.The ADU motor (upper) drives the upper roller and the
exit roller of the copier as a result of changing (moving) the gear on the copier side, thereby drawing in the
one-side-printed paper from the copier.
The paper drawn into the ADU is fed into the copier again from the ADU (bottom) by the roller driven by the
ADU motor (lower).The central roller is driven by the ADU motor (lower) through the belt.
Copier side
ADU 04-02-01
ADU motor (Upper)
ADU motor (Lower)
Flow of paper

October 2000 © TOSHIBA TEC 5 - 1 MD-0101 CIRCUIT DESCRIPTION
5. CIRCUIT DESCRIPTION
5.1 PWA Block Diagram
The ADU PWA has the motor driving IC only and the other signals pass through the PWA.
IC1 and IC2 are driver IC’s for the stepping motors and drive the ADU motors (upper/lower) on the output
side according to the input signals. IC1 drives the ADU motor (lower), and IC2 the ADU motor (upper). Vref
is the input to determine the value of the current which flows through each motor. The input voltage there
determines the load (current value) to the motor.
ADCNT is a signal which detects connection of the ADU and connected to GND. When its connector is
attached, the signal goes LOW so that the copier can confirm its connection.
ADU 05-01-01
SG
+5V
SG
2
3
1
+5V
SG
2
5
3
1
2
1
CN211CN212
+24V
6
4
2
3
1
+24V
PG
SG
R6 R7,R8
2
+24V
1
+5V
+5V
2
1
5
SG
4
3
PG
4
FDM-B
FDM-D
ADUFL
NC
ADUFU
ADUCOVSW
ADCNT
15
14
8
9
6
FDMC
FDMA
FDMB
FDMD
EXMC
EXMA
EXMB
EXMD
ADU PWA
PFC
PWA
3
5
4
3
12
2
8
9
6
7
5
4
3
2
8
9
6
7
AB
A
BB VREF
B
A0
A1
B0
B1
7
11
10
FDM-A
FDM-C
15
14
CN213 CN217CN214 CN216
PFC
PWA
EXM-C
IC2
Motor driver
EXM-A
EXM-D
EXM-B
AB
A
BB
B
A0
A1
B0
B1
IC1
Motor driver
11
SP
ADU paper jam sensor
(Upper)
ADU paper jam sensor
(Lower)
ADU cover open switch
ADU motor
(Upper)
ADU motor
(Lower)
5
+24V
6
4
2
3
1
CN215
R14 R15,R16
+5V
12
VREF
11
SP

MD-0101 CIRCUIT DESCRIPTION 5 - 2 October 2000 © TOSHIBA TEC
5.2 Meaning of Signals
The ADU cover open switch is a switch which detects the open or close state of the cover. A push switch
is used for the switch. The signal goes LOW when the cover is closed, and HIGH when it is open.
The ADU paper jam sensor (upper/lower) detects the presence or absence of paper in the transfer path.
Photo sensors are used for the sensors. When paper passes, the sensor arm in the transfer path is
pressed to turn on the sensor.
The ADU motor (lower) and ADU motor (upper) are 2-phase excitation PM type pulse motors (stepping
motors) and operate according to the drive signals from the driver IC’s (IC1, IC2).
Signal name Part name Functional description Status Note
ADUFL ADU paper jam Detects the transport of High: Paper present Photo sensor
sensor(Lower) paper(Lower)
ADUFU ADU paper jam Detects the transport of High: Paper present Photo sensor
sensor(Upper) paper(Upper)
ADUCOVSW ADU cover Detection of cover High:Open Push switch
open switch open/close status during
jam processing, etc.
EXMA-D ADU motor Drives the roller to transport - PM type
(Upper) paper(Upper) pulse motor
FDMA-D ADU motor Drives the roller to transport - PM type
(Lower) paper(Lower) pulse motor

October 2000 © TOSHIBA TEC 5 - 3 MD-0101 CIRCUIT DESCRIPTION
5.3 Timing Chart
Feed sensor
Exit sensor
ADU motor (Upper)
ADU paper jam sensor (Upper)
ADU motor (Lower)
ADU paper jam sensor (Lower)
3.11s (2.17s)
3.12s (2.18s)
3.13s (2.19s)
5.67s (4.01s)
5.84s (4.13s) 5.96s (4.30s) 10.96s (8.01s) 12.17s (8.95s) 19.51s (15.49s)
11.83s (8.79s) 14.57s (10.72s)
14.59s (10.74s) 17.14s (12.62s)
8.07s (5.87s) 10.66s (7.79s)
8.43s (6.13s) 10.96s (8.01s) 11.52s (8.57s) 12.08s (8.97s)
9.74s (7.10s) 13.16s (9.69s)
ADU 05-03-01
The values are data (reference values) applicable when the A4 size paper is used. The value in brackets is for the DP2500 machine.

October 2000 © TOSHIBA TEC 6 - 1 MD-0101 DISASSEMBLY AND REPLACEMENT
6. DISASSEMBLY AND REPLACEMENT
[A] ADU hinge cover F/R
1. Remove 2 screws and detach ADU hinge cover
F.
Fig. 6-1
2. Remove 2 screws and detach ADU hinge cover
R.
Fig. 6-2
[B] ADU paper guide assembly
1. Pull ADU release lever to release one hook and
open ADU.
Fig. 6-3
2. Release 2 hooks and remove ADU paper guide
assembly.
Fig. 6-4
Screw
Screw
ADU hinge cover F
Screw
Screw
ADU hinge
cover R
ADU release lever
ADU
ADU paper guide assembly Hook
223
224
225
226

MD-0101 DISASSEMBLY AND REPLACEMENT 6 - 2 October 2000 © TOSHIBA TEC
[C]ADU
1. Detach ADU hinge cover F.(See Fig. 6-1)
2. Detach ADU hinge cover R.(See Fig.6-2)
3. Remove one screw and detach harness fixing
plate.
Fig. 6-5
4. Remove one screw, detach the ground wire and
the connector.
Fig. 6-6
5. Remove stopper from ADU hinge F.
Fig. 6-7
6. OpenADU,removeonescrew,andremove plate
A.
Fig. 6-8
Harness fixing plate Screw
Connector
Ground wire
Screw
Snap pin
ADU hinge F
Screw Plate A
ADU
227-1
227-2
228
229

October 2000 © TOSHIBA TEC 6 - 3 MD-0101 DISASSEMBLY AND REPLACEMENT
7. Release one hook and detach the wire.
8. Release 2 hinges and remove ADU.
Fig. 6-9
[D] ADU cover
1. Detach ADU hinge cover F.(See Fig.6-1)
2. Detach ADU hinge cover R.(See Fig. 6-2)
3. Remove ADU.(See Fig.6-5 to 6-9)
4. Remove 2 screws, release one hook and wire,
and detach ADU hook cover R.
Fig. 6-10
5. Release 2 hooks, detach one connector, and re-
move ADU cover open sensor.
Fig. 6-11
6. Remove 4 screws and detach ADU cover.
Fig. 6-12
ADU Wire
Screw
Wire
ADU hook cover R
Hook
Hook
ADU cover
open sensor
Connector
Screw
Screw
ADU cover
230
231
232
233

MD-0101 DISASSEMBLY AND REPLACEMENT 6 - 4 October 2000 © TOSHIBA TEC
[E] ADU PWA
1. Detach ADU hinge cover F.(See Fig.6-1)
2. Detach ADU hinge cover R.(See Fig.6-2)
3. Remove ADU.(See Fig. 6-5 to 6-9)
4. Detach ADU cover. (See Fig.6-10 to 6-12)
5. Remove 4 screws, release the harness from the
clamp, and detach PWA cover.
Fig. 6-13
6. Detach all the connectors from ADU PWA, re-
lease 4 locking supports, and remove ADU
PWA.
Fig. 6-14
[F] ADU motor
1. Detach ADU hinge cover F.(See Fig. 6-1)
2. Detach ADU hinge cover R.(See Fig.6-2)
3. Remove ADU.(See Fig. 6-5 to 6-9)
4. Detach ADU cover. (See Fig.6-10 to 6-12)
5. Detach oneconnector from ADUPWA (CN216),
remove 2 screws, remove ADU motor by sliding
in the direction of the arrow.
Note: Apply 0.1g of GREASE (X5-6020) to the
gear tooth surface. Fig. 6-15
Clamp
Screw
Screw
PWA cover
Clamp
Locking support
ADU PWA
ADU motor Screw
Connector
CN216
ADU motor
234
235
236-1