Panasonic EY74A1 User manual

© Panasonic Eco Solutions Power Tools Co., Ltd.
2012. All rights reserved. Unauthorized copying and
distribution is a violation of law.
Order Number PTD1208E02CE
Drill & Driver
Model No. EY74A1
Europe
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 ---------------------------------14
6 Schematic Diagram ---------------------------------------------14
7 Exploded View and Replacement Parts List -----------15

2
1Warning
Caution:
• Pb free solder has a higher melting point that standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please
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

3
3 Troubleshooting Guide
3.1. Troubleshooting Guide (Refer to Wiring Connection Diagram)

4

5

6
3.2. Trial Operation (after checking Troubleshooting Guide)
3.2.1. Assembly
• Confirm if there is no gap between housing A and B by pinching lead wires.
• There is no dust or deformation on battery terminals.
• Confirm if there is no dirt when repairing.
3.2.2. Operation
• Confirm the forward and reverse side of rotation.
• Confirm if LED lights ON. Once battery pack is removed, press the switch handle; otherwise LED does not light ON.
• Check if the motor rotation become higher as the amount of depression of switch handle.
• Check if the rotation speed is normal rated value.
High : 1,750/min (rpm) at 18V, 1,400/ min (rpm) at 14.4V
Low : 600/min (rpm) at 18V, 450/ min (rpm) at 14.4V
• Confirm the action when setting the drill mode .
• Confirm if the rotation stops immediately when releasing the switch handle.
• Confirm if the chuck jaws move smoothly and hold the bit firmly.
• Check if the clutch torque changes suited for the number of clutch.
• Confirm if the chuck is assembled firmly and chuck jaws operate normally.
• Confirm if there is no abnormal sound when shaking the unit with the switch on.

7
4 Disassembly and Assembly Instructions
*Please assemble by opposite procedure.
4.1. How to remove the keyless chuck
4.2. How to remove the housing

8
4.3. How to remove the lead wires from the motor brush assembly and the
control PCB.
4.4. How to remove the switch assembly

9
4.5. How to remove the driving block
4.6. How to remove the motor carbon brush assembly

10
4.7. How to remove the driving block and the motor assembly
4.8. How to remove the control PCB

11
4.9. How to remove the clutch handle, click spring A and H/L change handle
4.10. Disassembly and assembly for the driving block

12
4.11. Assembly of the driving block and the clutch handle
4.12. Assembly of the H/L change handle

13
4.13. Caution for assembly

14
5 Wiring Connection Diagram
6 Schematic Diagram

Model No. : EY74A1 Exploded View
15
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Model No. : EY74A1 Parts List
Safety
Ref.
No. Part No. Part Name & Description Q'ty Remarks
1 WEY74A1H3078 HOUSING AB SET 1 (only for Europe)
1 WEY74A1H3079 HOUSING AB SET 1 (only for Oceania)
2 WEY65450L6806 CHUCK FASTENING SCREW 1
3 WEY7441K7917 KEYLESS CHUCK 1
4 WEY74A1K3228 CLUTCH HANDLE 1
5 WEY74A1L4058 DRIVING BLOCK 1
6 WEY7460H3237 H/L CHANGE HANDLE 1
7 WEY74A1L1008 MOTOR ASSEMBLY 1
8 WEY7441L2007 SWITCH ASSEMBLY 1
9 WEY7441L6028 SCREW 2
10 WEY74A1L2118 MAIN PCB ASSEMBLY 1
11 WEY7460K3958 OPERATION PLATE 1
12 WEY74A1L0178 CLICK SPRING A 1
13 WEY6230K9216 TORX TAPPING SCREW 8
14 WEY7547H3247 F/R SELECTOR HANDLE 1
15 WET7441L6487 NUT 1 M4
16 WEY7441K6217 SCREW 1 4*14
17 WEY7543K3187 PLATE HOOK 1
－WEY74A1K7018 TOOL CASE 1 (only for Europe)
－WEY74A1L7019 TOOL CASE 1 (only for Oceania)（14.4V）
－WEY74A1K7010 TOOL CASE 1 (only for Oceania)（18V）
－WEY74A1L8088 POERATING INSTRUCTIONS 1
16