Toshiba MR-2017, MR-2020 service manual Troubleshooting for Electrical Errors

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6.2Troubleshooting for Electrical Errors

1)ADF does not work (except in the case of a paper jam or when the cover is open) Interface harness connected properly?

↓ NO→ Connect the harness properly or replace it

YES

DC+5V supplied to CN70-2, 3pin?

↓NO→ Connect the harness properly or replace it

YES

DC+24V supplied to CN70-6, 7pin?

↓NO→ Connect the harness properly or replace it

YES

DC+24V supplied to CN72-4pin?

↓NO→ Check or replace the jam access cover switch

YES

Empty sensor is ON when there is paper?

↓NO→ Check or replace the empty sensor

YES

Check or replace the ADF board

2) Abnormality of motor

Power supplied and drives signals to connector of motor?

↓NO→ Check or replace motor

YES

There is no mechanical overloading at the motor and the drive system is correct? (Belt tension etc.)

↓NO→ Check or replace motor harness

YES

Check or replace the RADF board

3)Communication error Interface cable normal?

↓ NO→ Replace the interface cable

YES

Check or replace the ADF board and check the equipment

4) Size detection error

Is the sensor harness normal, and is it connected to the connector (CN73) properly?

↓NO→ Connect the harness to the connector properly or replace it.

YES

Are the original tray width sensor and original tray sensor normal?

↓NO→ Check the original tray width sensor and original tray sensor or replace them.

YES

Check the ADF board or replace it.

MR-2017/2020

© 2005 - 2009 TOSHIBA TEC CORPORATION All rights reserved

TROUBLESHOOTING

 

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Contents MR-2017/2020 Trademarks 09/12 Page Contents Control PC Board Circuit Specification MR-2017 MR-2020Specification Main Components Location ComponentsSectional View R4 R2 R3 R1Original tray Registration roller Original exit tray Intermediate transfer rollerElectric Parts Layout SW M1 SOL S7 ADFSymbols and Functions of Various Components Symbol Name FunctionADF control PC board ADF Controls the ADF Board Diagram of Signal Blocks Description of Interface Signals RxDDescription of Operations Feed motor drive section Read motor drive sectionOriginal feed motor drive section Read motor drive section Read motor Exit roller Pre-reading rollerOriginal Size Detection Original width size Orange Yellow GrayPower on Standby ADF jam access Cover OPEN? All sensors OFF?Empty sensor ON? Original Certain period Time passed?Read motor rotates Scanning start signal Certain periodSent level High Original exit Jam Read motor stopsDescription of Circuit Drive Circuit for Read Motor Reset Circuit Description of Operations Cover Front coverFront cover Jam access cover Rear coverRear cover PinJam access cover Left coverLeft cover Original tray Bushing ScrewRoller Paper feeder unitClip Pickup roller PM Feed roller PMShaft Clip Pickup rollerPulley ShaftSeparation roller PM Separation roller unitFeeder lower guide Original trayStay Registration roller Exit rollerExit guide Exit rollerPre-reading guide Intermediate transport rollerHinge pin Pre-reading guideConnector Pre-reading rollerPost-reading roller Screw BushingFlange Bearing Bushing Pulley Ring Bushing Ring Pulley Timing beltHolder Upper guide Motor / Motor drive section Original feed motor M1Spring Original feed motor drive section Harness clampRing Bushing Bracket WhiteRead motor M2 Read motorRead motor drive section SpringBracket Screw Tensioner Ring Solenoid Original pickup solenoid SOLOriginal pickup solenoid Mark-off lineSensor/switch Original tray width sensor S2Original tray sensor S1 Original tray sensorJam access cover sensor S7 Original empty sensor S3Metal plate cover Original registration sensor S4 Original empty sensor Original registration sensorRead sensor S5 Original exit/reverse sensor S6ADF opening/closing sensor S8 Radf opening/closing sensorJam access cover opening/closing switch SW BracketWhite Red Black PC Board ADF control PC board ADF boardADF board Others Hinge stopperAdjustment of Position CheckingAdjustment Adjustment Match the screw hole positions Install the right-hand hinge screw at the rear Place the platen sheet on the original glass Adjustment of Height ~0.2mm 0mmTurn it clockwis Adjustment of Skew 19 Chart OriginalAdjustment Adjustment of the Leading Edge Position 23 Chart OriginalAdjustment of Horizontal Position Adjustment of Copy Ratio Adjustment of ADF Opening/Closing Sensor Troubleshooting Troubleshooting for Mechanical ErrorsTroubleshooting for Electrical Errors Feed signal reception jam JamJam not reaching the original registration sensor Jam not reaching the read sensorRadf jam access cover open Stop jam at the registration sensorStop jam at the read sensor Stop jam at the exit sensorCover open jam in the read ready status Troubleshooting Periodic Maintenance Cleaning Lubrication/Coating Replacement Operation checkRemarks CoatingRewriting ROM Firmware Updating Circuit Diagram / Harness Diagram Assembly of PC BoardCircuit Diagram PWA-F-DLG-644PWA-F-DLG-643 Control PC Board Circuit Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram Circuit Diagram / Harness Diagram

MR-2020, MR-2017 specifications

The Toshiba MR-2017 and MR-2020 are innovative microwave ovens that exemplify Toshiba's commitment to advanced cooking technology and user-friendly design. Designed for modern kitchens, these models combine efficiency and versatility, making them ideal for a wide range of cooking tasks.

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On the other hand, the MR-2020 offers enhanced capabilities with a slightly larger capacity and a higher wattage output of 800 watts. This model not only heats food but also includes grill and convection settings, allowing for more versatile cooking methods. With the grilling function, users can achieve crispy textures similar to conventional ovens, while convection cooking promotes even heat distribution for consistent results.

Both models are equipped with advanced technology such as the smart sensor cooking feature. This technology automatically calculates the optimal cooking time based on the food type and quantity, ensuring perfectly cooked meals without any guesswork. Safety is also a priority, with child safety locks that prevent accidental operation, making them suitable for families.

The control panel on both the MR-2017 and MR-2020 is designed for ease of use, featuring intuitive buttons and a clear display, making it accessible for all users. Additional features include defrost settings for quick thawing and various pre-set cooking modes tailored for specific food types like popcorn, pizza, and baked potatoes.

In conclusion, the Toshiba MR-2017 and MR-2020 microwave ovens blend advanced cooking technologies with user-friendly features, catering to diverse culinary needs. Their combination of power, safety, and convenience makes them a valuable addition to any kitchen, ensuring that delicious meals are just minutes away. Whether you're reheating leftovers or trying out new recipes, these models are built to deliver performance and satisfaction.
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