Original Size Detection, Original width size | Toshiba MR-3022

3.2Original Size Detection

The original tray width sensor, original length detection sensor, and original width detection sensors-1 and -2 work in combination to detect the size of originals.

Original tray width sensor

Original width detection sensor-1

Original width detection sensor-2

3

Original length detection sensor

Fig. 3-5

3.2.1Outline

When an original is placed on the original tray, the width of the original is detected by the positions of the original width guides. Then the original width sensors -1 and -2 and the original length detection sensor detect the size of the original being transported. Based on the detection result of these sensors, the size of the original is finally determined.

3.2.2Original tray width sensor

The original tray width sensor detects the width of an original placed on the original tray.

It is detected by the brush attached to the rack moving on the original tray width sensor, which is a board with the different length of the patterns written.

This brush is moved as the original width guide is moved. Signals (TWID0S, TWID1S, TWID2S) are opened and shorted to SG by this movement.

The combination of these short (= low level) and open (= high level) can determine the width of the orig- inal.

Sizes detectable in combination of these open and short of the signals are as follows:

TWID2S	TWID1S	TWID0S		Original width size	Original width size
TWID2S	TWID1S	TWID0S		(LT series)	(A4 series)
				(LT series)	(A4 series)
L	H	H		-	B5-R
H	L	H		ST-R	A5-R
L	L	H		LD / LT	A3 / A4
L	H	L		8.5 x 8.5 / LT-R / LG / 13"LG	A4-R / FOLIO
L	L	L		COMPUTER	B4 / B5
	H (= high level): Open			L (= low level): Short

© 2005 - 2011 TOSHIBA TEC CORPORATION All rights reserved	MR-3018/3020/3021/3022
	DESCRIPTION OF OPERATIONS

3 - 5

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Image 19

Toshiba MR-3022, MR-3018 Original Size Detection, Original tray width sensor, = high level Open = low level Short

Contents

MR-3018/3020/3021/3022 11/12 Trademarks 11/12 Page Contents Rewriting ROM Firmware Updating Circuit Diagram / Harness Diagram MR-3018/3020 MR-3021/3022 Specifications Specifications Location Components Main Components06/09 Sectional View S8S4 S10 Electric Parts LayoutS12 S11 S7 S6 S5 Solenoid Symbols and Functions of Various ComponentsSensors and Switches Motors Diagram of Signal Blocks Description of Interface Signals Feed motor drive section OutlineRead motor drive section Original feed motor drive section Intermediate transfer roller Read motor drive section Exit/reverse roller Original exit/reverse motor drive sectionGate solenoid Reverse flap Exit/reverse motor Reverse Original width size Original Size DetectionOriginal tray width sensor = high level Open = low level Short A4 series width sizes mixed at B5-R standard A4 series width sizes mixed at A3 / A4 standardA4 series width sizes mixed at B4 / B5 standard A4 series width sizes mixed at A4-R standard LT series width sizes mixed at LD / LT standard LT series ORG-SRSLT series width sizes mixed at LG / LT-R standard Jam Power on Standby Radf jam accessCover OPEN? All sensors OFF? Empty sensor ON? Registration roller rotates. Feed motor rotates reverse OriginalCertain period Time passed? Read motor rotates Sent level High Scanning start signalCertain period Duplex? Read motor stops Certain period Time passed? Original exit/reverse Sensor ON?Jam Read sensor OFF? Certain period Time passed? Gate solenoid on Scanning start signal sent level Low Scanning completed Jam Original exit/reverse motor and read motor stop Transport request Signal received?Read motor and exit/reverse motor rotate at requested speed Scanning completed Exposure and scanning start OriginalSensor OFF? Original intermediate Transport sensor ON? Original exit/reverse motor and read motor stopJam Original exit/reverse Sensor OFF? Drive Circuit for Feed Motor Description of Circuit Drive Circuit for Read Motor Drive Circuit for FAN Motor Drive Circuit for Exit Motor Drive Circuit for Pickup Solenoid Reset Circuit Drive Circuit for Gate Solenoid Front cover CoverFront cover Pin Jam access coverRear cover Rear cover Left cover Take off the jam access cover by sliding itRemove 1 screw and the hinge pin Left cover Original tray Original reverse tray Original reverse tray Take off the paper feeder unit RollerPaper feeder unit Remove 1 clip and slide 2 bushings Clip Pickup roller Pickup roller PMFeed roller PM Shaft Shaft Slide the pulley and remove 1 pinPull out the shaft and take off the feed roller Pulley Separation roller PM Feeder lower guide Take off the jam access guideStay Exit/reverse roller Registration roller Exit/reverse roller Exit guide Pre-reading guide Pre-reading guideIntermediate transport roller Hinge pin Screw Bushing ConnectorPre-reading roller Post-reading roller Platen guide Flange Bearing BushingBushing Holder Ring Reverse registration rollerUpper guide Post-reading roller Roller Open the RADF. Take off the reverse regis- tration roller Read motor Motor / Motor drive sectionFan motor M4 Read motor M2 Harness clamp Read motor drive sectionSpring Spring Screw Tensioner Ring Remove 3 screws and then take off the bracketTake off 1 timing belt and 4 bushings Timing belt Original feed motor drive section Original feed motor M1 09/01 Take off the timing belt, bushings and pulleyRing Bushing Bracket White Black Red Section Disconnect 1 connector from the Radf conOriginal exit/reverse motor M3 Original feed motor drive Bracket SolenoidOriginal pickup solenoid SOL1 Original pickup solenoid Mark-off line Gate solenoid SOL2Gate solenoid Original tray width sensor S2 Sensor/switch Release 2 latches and take off the original tray sensor Original tray sensor S1Original tray sensor Metal plate cover Jam access cover sensor S11Jam access cover sensor Original empty sensor S3 Original length detection sensor S4 Remove 2 screws and take off the bracketOriginal empty sensor Original length detection sensor Original width detection sensor-2 S7 Original registration sensor S5Take off the feeder lower guide Feeder lower guide Original width detection sensor-1 S6 Original exit/reverse sensor S10 Read sensor S9Take off the pre-reading upper guide Pre-reading guide Original intermediate transport sensor S8 Original exit/reverse sensor Disconnect 3 terminals. Remove 1 screw Original jam access cover opening/closing switch SW1Take off the original jam access cover Radf opening/closing sensor S12 Radf control PC board ADF board PC BoardADF board Stopper OthersHinge stopper Remove 1 screw and then take off the hinge Disassembly and Assembly Checking Adjustment of Position Adjustment 05/12 05/12 MR-3021/3022 only Install the right-hand hinge screw at the rearInstall the bracket on the left-hand hinge Side 05/12 ~0.5mm 0mm Adjustment of Height Turn it clockwise Turn it counterclockwise Heightened 19 Chart Original Adjustment of Skew Adjustment Simplex copying 05/12 26 Chart Original Adjustment of the Leading Edge Position Adjustment 11/12 Adjustment of Horizontal Position 11/12 Adjustment of Copy Ratio 11/12 Adjustment of Radf Opening/Closing Sensor Adjustment Troubleshooting for Mechanical Errors Troubleshooting Check or replace the Radf board Troubleshooting for Electrical Errors Jam not reaching the read sensor Feed signal reception jamJam Jam not reaching the original registration sensor Stop jam at the original exit/reverse sensor Radf jam access cover open jamStop jam at the original registration sensor Stop jam at the read sensor Cover open jam in the read ready status Radf open jam11/04 09/05 Symbols used in the checklist Periodic Maintenance Rewriting ROM Firmware Updating Component side Soldered side Assembly of PC Board Circuit Diagram 2005 2011 Toshiba TEC Corporation All rights reserved 1 MR-3018/3020 Control PC Board Circuit Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram 2 MR-3021 11 09/05 09/05 13 09/05 09/05 15 09/05 3 MR-3022 17 09/05 09/05 19 09/05 09/05 21 09/05 Circuit Diagram / Harness Diagram