PICTORIALWIRING DIAGRAM MC-E780 Carbon brush holder "S" marked Black MOTOR THERMAL CUT-OUT Yellow Carbon brush holder "P" marked Yellow CORD REEL ON/OFF Black SWITCH White POWER CONTROL CIRCUIT MC-E781 / MC-E783 Carbon brush holder "S" marked Black MOTOR THERMAL CUT-OUT...
SPARE PARTS LIST Applied for REF. No. DESCRIPTION PART No. Pcs/Set REMARKS MC-E781 MC-E783 MC-E780 all countries ( ) CORD REEL SUPPORT UNIT AMC8P91T1000 • • • Needed a screwdriver type TAPPING SCREW (CORD REEL) XTT4*16C • • • TORK T20 H DUST PAPER BAG (PACK OF 5/PC.)
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REPLACEMENT OF MAIN PARTS 3. Remove 7 screws from upper body and take out front cover Front cover and upper body. (Fig. 3) Cord reel Switch Pedal Pedal Spring Spring Upper body Lower body Fig. 3 4. Take out cord reel ass’y and remove black and white lead wires (provided with quick-connect terminal) from the contact spring tabs.
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Remove (quick- connect terminals) Central motor support (Except mod. MC-E780) Fig. 5 6. Remove 3 screws from motor cover and separate cover A and B. (Fig. 6) 7. Remove noise suppressor and disconnect yellow and black lead wires (provided with quick-connect terminals) from the carbon brush holder tabs.
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REPLACEMENT OF MAIN PARTS 8. Remove from the motor rear /front motor supports and noise suppressor. (Fig. 7) Front motor Motor support Rear motor Noise support suppressor Fig. 7 9. Replace the motor with a new one and connect yellow and Motor cover B black lead wires to the carbon brush holder tabs.
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REPLACEMENT OF MAIN PARTS (2) Carbon brushes Cut metal end Metal end NOTE: The two carbon brushes should be replaced at the same time. 1. Take out motor unit and remove motor cover A and B as explained previously in paragraph (1) “Motor”, points 1-6. 2.
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REPLACEMENT OF MAIN PARTS 3. Remove power control circuit from its fastening points and Fastening points disconnect the lead wires from the power control circuit. (Fig. 15) 4. Replace power control circuit with a new one and connect the lead wires according to the schematic diagram. 5.
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REPLACEMENT OF MAIN PARTS 3. Replace the potentiometer with a new one and connect the lead wires (blue and grey) to the potentiometer tabs. 4. Reinstall the potentiometer in its support and reassemble the remaining parts in the reverse order. (Fig. 18) Fig.
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REPLACEMENT OF MAIN PARTS (2) Power cord Stopper 1. Remove cord reel unit as explained previously in paragraph (1) “Cord reel unit”, points 1-3. 2. Unwind the total power cord length from the cord reel. 3. Press and release the stopper on the cord reel and lift the contact base by pushing its lower end.
TROUBLE SHOOTING GUIDE CONDITION CHECKPOINT METHOD OF INSPECTION CAUSE / REMEDY Motor fails to rotate. Power cord Check power cord continuity between If there is no continuity, (no noise is heard connection. plug pins and contact base. replace the power cord. at all).