Panasonic 7441LF, Service Manual

Page 1: ...river Cordless Hammer Drill Driver Model No EY7441 Cordless Drill Driver Model No EY7940 Cordless Hammer Drill Driver Europe and Oceania TABLE OF CONTENTS PAGE PAGE 1 Warning 2 2 Specifications 2 3 Troubleshooting Guide 3 4 Disassembly and Assembly Instructions 7 5 Wiring Connection Diagram 15 6 Schematic Diagram 15 7 Exploded View and Replacement Parts List 16 ...

Page 2: ...se use a soldering iron with temperature control and adjust it to 750 20 F 400 10 C In case of using high temperature solder ing iron please be careful not to heat too long Pb free solder will tend to splash when heated too high about 1100 F 600 C 2 Specifications 2 1 EY7441 MAIN UNIT 2 2 EY7940 MAIN UNIT 2 3 MAXIMUM RECOMMENDED CAPACITIES ...

Page 3: ...3 3 Troubleshooting Guide Refer to Wiring Connection Diagram ...

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Page 6: ...ce battery pack is removed press the switch handle otherwise LED does not right ON 3 Confirm if the tools may not become hot in a short operation 4 Confirm the action when setting the DRILL mode 5 Confirm if the chuck jaws move smoothly and hold the bit firmly only for EY7940 6 Confirm no vibration on reverse side 3 1 3 SWITCH 1 Confirm the rotation of speed if it changes between 200 1400 140 rpm ...

Page 7: ... 2 Turn the lock collar counterclockwise looking from the front to open the chuck jaws 3 Use a screwdriver to turn the chuck fastening screw inside the chuck clockwise direction of the arrow and remove the screw NOTE If the chuck fastening screw will not come loose insert the allen wrench into the chuck and lightly tap in the clockwise direction with a hammer to tighten the chuck and then loosen t...

Page 8: ...8 4 2 How to disassemble Main unit Ref No 3A Procedure 3A Removal of the Housing 1 Remove 8 housing screws Ref No 3B Procedure 3A 3B Removal of Motor screw Removal 1 Remove 2 screws ...

Page 9: ...ock 3 Separate the motor from the gear box block by twisting the motor to unlock tabs Ref No 3D Procedure 3A 3B 3C 3D Removal or assembly of Control PCB Removal 1 Take out the connector from the control PCB NOTE Make sure hold the connector at the bottom area Assembly 1 Apply the grease around the tact switch 2 Insert the connector ...

Page 10: ...remove 2 The internal parts of gear box block can be removed one after another Attachment 1 Start from inserting 6 pins into the driving block as shown in the fig ure 2 Assemble the other parts in reverse order as shown in the figure NOTE Carriers and Ring Gears have their own correct directions for proper reassembly ...

Page 11: ... that the adjusting screw has its own correct direction for proper assembly Failure to do so the clutch handle does not rotate properly 2 Turn the adjusting screw into the driving block about one rotation for clockwise direction 3 Set the clutch handle with position 1 on top Align the position 1 of clutch handle with the narrow projection of driving block 4 Insert the clutch handle with adjusting ...

Page 12: ...own correct direction for proper assembly Failure to do so the clutch handle does not rotate properly 2 Turn the adjusting screw into the driving block about one rotation for clockwise direction 3 Turn the adjusting screw into the driving block about one rotation for clockwise direction Align the projection of clutch handle on bottom Ref No 3G Procedure 3A 3B 3C 3D 3E 3F 3G Attachment of the H L c...

Page 13: ...13 Ref No 3H Procedure 3A 3B 3C 3D 3E 3F 3G 3H Assemble of Driving block ...

Page 14: ...14 Ref No 3H Procedure 3A 3B 3C 3D 3E 3F 3G 3H Assemble of Driving block ...

Page 15: ...15 5 Wiring Connection Diagram 6 Schematic Diagram ...

Page 16: ...Model No EY7441 Exploded View for EY7441 7 Exploded View and Replacement Parts List ...

Page 17: ...GEAR 6 3PCS PK 16 WEY7441L0858 THRUST PLATE 1 φ37 95 17 WEY7441L1118 CARRIER 1 18 WEY7441L0268 STOPPER 1 19 WEY7441L1768 GEAR CASE 1 20 WEY7441K9628 TAPPING SCREW 4 K3 12 21 WEY7441L1458 RING GEAR A 1 22 WEY7441L1128 CARRIER B 1 23 WEY7441L1468 RING GEAR B 1 24 WEY7441L1368 PLANET GEAR B 3 3PCS PK 25 WEY7441L0888 THRUST PLATE 1 φ37 8 26 WEY7441L4057 GEAR BOX BLOCK 1 27 WEY7441L1008 MOTOR ASSEMBLY ...

Page 18: ...Model No EY7940 Exploded View for EY7940 ...

Page 19: ... WEY7441L1768 GEAR CASE 1 12 WEY7940K9628 TAPPING SCREW 4 K3 12 13 WEY7441L1458 RING GEAR A 1 14 WEY7441L1128 CARRIER B 1 15 WEY7441L1468 RING GEAR B 1 16 WEY7940L1368 PLANET GEAR B 3 3PCS PK 17 WEY7441L0888 THRUST PLATE 1 φ37 8 18 WEY7940L4057 GEAR BOX BLOCK 1 19 WEY7441L1008 MOTOR ASSEMBLY 1 20 WEY7441L2578 MOTOR BRUSH ASSEMBLY 1 21 WEY7441L0127 FIXING PLATE 1 22 WEY7441L2007 SWITCH ASSEMBLY 1 2...