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Summary of Contents for Toshiba MR-2012
- Page 1 AUTOMATIC DOCUMENT FEEDER MR-2012 File No. 31100013...
- Page 2 The installation and service should be done by a qualified service technician. When installing the MR-2012 to the Plain Paper Copier, be sure to follow the instructions described in the “Unpacking/Set-Up Procedure for the MR-2012” booklet which comes with each unit of the MR-2012.
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Page 3: Table Of Contents
5.2 Detection Circuit ....................... 5-1 5.3 ADF Read Sensor Input Circuit ..................5-2 5.4 ADF Motor Drive Circuit ....................5-3 5.5 Meaning of Signals ......................5-4 5.6 Timing Chart ........................5-5 6. DISASSEMBLY AND REPLACEMENT ..............6-1 October 2000 © TOSHIBA TEC MR-2012 CONTENTS... -
Page 4: Specifications
: A5-R (Min.) to A3 (Max.) Dimensions : 530 (W) x 450 (D) x 120 (H) mm Weight : Approx. 5.4 kg Power supply : 5V, 24V (Supplied from copier) October 2000 © TOSHIBA TEC 1 - 1 MR-2012 SPECIFICATIONS... -
Page 5: Outline
2. OUTLINE 2.1 Names of Various Components Document guide R Connection Cable Document tray Document guide F ADF top cover ADF 02-01-01 October 2000 © TOSHIBA TEC 2 - 1 MR-2012 OUTLINE... -
Page 6: Layout Of Electrical Parts
2.2 Layout of Electrical Parts SEN4 SEN3 SEN6 SEN5 SEN2 SEN1 ADF 02-02-01 ADF PWA ADF 02-02-02 MR-2012 OUTLINE 2 - 2 October 2000 © TOSHIBA TEC... - Page 7 HAISI-SEN Detects the ejection of document. ADF exit sensor ADF PWA PWA which relays the sensor signals and motor drive signals. ADF-MOT Drives the roller to transport originals. ADF motor October 2000 © TOSHIBA TEC 2 - 3 MR-2012 OUTLINE...
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Page 8: Harness Connection Diagram
ADF CNT/REQ 23 EMPTY RADF CNT CN10 OPN+5V SG 25 Document empty sensor DF_OPN CN11 ADF open sensor Document WIDTH+5V WIDTH width sensor SIZE+5V SIZE CN12 Document length sensor ADF 02-03-01 MR-2012 OUTLINE 2 - 4 October 2000 © TOSHIBA TEC... -
Page 9: Board Assembly
2.4 Board Assembly ADF 02-04-01 October 2000 © TOSHIBA TEC 2 - 5 MR-2012 OUTLINE... -
Page 10: Operational Description
Scanner ADF open cover sensor ADF registration sensor Document empty sensor ADF exit sensor Document length sensor Document width sensor ADF top cover open switch ADF motor ADF 03-02-01 October 2000 © TOSHIBA TEC 3 - 1 MR-2012 OPERATIONAL DESCRIPTION... -
Page 11: Detection Of Abnormal Status
When the time taken after the top of the document passes the ADF read sensor exceeds that value, an ADF exit sensor unreached jam will be detected. Document empty sensor ADF registration sensor ADF exit sensor ADF read sensor adf 03-03-06 MR-2012 OPERATIONAL DESCRIPTION 3 - 2 October 2000 © TOSHIBA TEC... -
Page 12: Flow Chart
3.4 Flow Chart Start button ON Document feed from ADF Scanning of document Cassette feed Copy Ejection Scanning of final document October 2000 © TOSHIBA TEC 3 - 3 MR-2012 OPERATIONAL DESCRIPTION... -
Page 13: Mechanical Description
ADF registration sensor. When the top of the paper reaches the ADF read sensor, the scanner starts scanning. The scanned document passes over the ADF exit sensor as driven by the read roller and then ejected. October 2000 © TOSHIBA TEC 4 - 1 MR-2012 MECHANICAL DESCRIPTION... -
Page 14: Document Size Detection Method
234.00 - 277.99 B5 (257 x 182) B4 (257 x 364) 278.00 - 310.00 A4 (297 x 210) A4 (297 x 420) (*1: ON for a document length of 306 mm) MR-2012 MECHANICAL DESCRIPTION 4 - 2 October 2000 © TOSHIBA TEC... - Page 15 LG (215.9 x 355.6) 237.00 - 268.99 COMPUTER (257.2 x 356) 269.00 - 310.00 LT (279.4 x 215.9) LD (279.4 x 431.8) (*1: ON for a document length of 306 mm) October 2000 © TOSHIBA TEC 4 - 3 MR-2012 MECHANICAL DESCRIPTION...
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Page 16: Drive System
When the ADF motor turns counterclockwise, the pickup roller ascends causing the spring clutch mounted on the feed roller shaft to slip so that the driving force is no longer transmitted. MR-2012 MECHANICAL DESCRIPTION 4 - 4 October 2000 © TOSHIBA TEC... -
Page 17: Circuit Description
Since the document empty sensor does not require accuracy for detecting the presence of a document, its output signal simply passes through the ADF PWA. October 2000 © TOSHIBA TEC 5 - 1 MR-2012 CIRCUIT DESCRIPTION... -
Page 18: Adf Read Sensor Input Circuit
PTr output voltage become the required voltage, and adjusts the LED current through the voltage-current conversion circuit consisting of IC7, Q2, R20, etc. MR-2012 CIRCUIT DESCRIPTION 5 - 2 October 2000 © TOSHIBA TEC... -
Page 19: Adf Motor Drive Circuit
The current value for the motor can be set as desired by changing the duty of the PWM signal. AENB is a signal to control the output of the motor driver. When the signal is at “High” level, the output of the driver becomes effective. October 2000 © TOSHIBA TEC 5 - 3 MR-2012 CIRCUIT DESCRIPTION... -
Page 20: Meaning Of Signals
It detects the presence or absence of a document according to the strength of reflected light from the mirror. The document exit sensor detects the ejection of a document. A photo sensor is used for the sensor. MR-2012 CIRCUIT DESCRIPTION 5 - 4 October 2000 © TOSHIBA TEC... -
Page 21: Timing Chart
5.6 Timing Chart ADF 05-06-01 October 2000 © TOSHIBA TEC 5 - 5 MR-2012 CIRCUIT DESCRIPTION... -
Page 22: Disassembly And Replacement
2. Remove one screw, release 3 hooks, and de- ADF cover R tach ADF cover R. Screw 3. Detach one connector from ADF PWA (CN5). Hook ADF PWA Hook Connector Fig. 6-4 October 2000 © TOSHIBA TEC 6 - 1 MR-2012 DISASSEMBLY AND REPLACEMENT... - Page 23 2. Align the cut part of document guide rack with the triangle mark ( ) of document guide gear. Document guide gear Document guide rack Fig. 6-8 MR-2012 DISASSEMBLY AND REPLACEMENT 6 - 2 October 2000 © TOSHIBA TEC...
- Page 24 4. Detach 2 stop rings and remove shutter stop- per. Straight Pin 5. Slide ADF holder F in the direction of the arrow Shutter Stopper and draw out pin. Shutter Stopper Fig. 6-12 October 2000 © TOSHIBA TEC 6 - 3 MR-2012 DISASSEMBLY AND REPLACEMENT...
- Page 25 Brake pad 4. Remove the old brake pad, wipe off the mount- ing surface, and mount a new brake pad to the position shown below. Brake pad Fig. 6-16 MR-2012 DISASSEMBLY AND REPLACEMENT 6 - 4 October 2000 © TOSHIBA TEC...
- Page 26 Ground wire 177-2 Fig. 6-19 4. Remove 4 screws, release 2 hooks, and remove ADF feed guide assembly Screw ADF feed guide assembly. Screw Hook Hook Hook Fig.6-20 October 2000 © TOSHIBA TEC 6 - 5 MR-2012 DISASSEMBLY AND REPLACEMENT...
- Page 27 6. Remove 3 screws, release timing belt 166, and Screw remove ADF feed motor assembly. 7. Remove tension spring 2. ADF feed Screw motor assembly Timing belt 166 Fig. 6-23 MR-2012 DISASSEMBLY AND REPLACEMENT 6 - 6 October 2000 © TOSHIBA TEC...
- Page 28 (See Fig. 6-19 and 6-20) Hook 4. Remove ADF feed motor assembly. (See Fig. 6-22 and 6-23) Fig. 6-26 5. Remove one screw, release 2 hooks, and de- tach sensor cover R. October 2000 © TOSHIBA TEC 6 - 7 MR-2012 DISASSEMBLY AND REPLACEMENT...
- Page 29 9. Remove one screw and remove the ground wire Screw and ADF exit/read sensor bracket while push- Ground wire ing the part indicated by the arrow. 188-1 Fig. 6-30 MR-2012 DISASSEMBLY AND REPLACEMENT 6 - 8 October 2000 © TOSHIBA TEC...
- Page 30 Feed pulley M-66 E-ring Fig. 6-33 12. Detach the E-ring, slide bearing inwards, and ADF feed roller Bearing shaft assembly E-ring remove ADF feed roller shaft assembly. Bearing Fig. 6-34 October 2000 © TOSHIBA TEC 6 - 9 MR-2012 DISASSEMBLY AND REPLACEMENT...
- Page 31 1. Open ADF unit. 2. Release 3 screws and hook and detach ADF front cover by sliding it in the direction of the arrow. Screw 191-2 Fig. 6-36 MR-2012 DISASSEMBLY AND REPLACEMENT 6 - 10 October 2000 © TOSHIBA TEC...
- Page 32 1-1, KANDA NISHIKI-CHO, CHIYODA-KU, TOKYO, 101-8842 JAPAN...
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