Panasonic EY78A1 User manual

© Panasonic Eco Solutions Power Tools Co., Ltd.
2012. All rights reserved. Unauthorized copying and
distribution is a violation of law.
Order Number PTD1207X01CE
Cordless Rotary Hammer Drill & Driver
Model No. EY78A1
Europe
Oceania
TABLE OF CONTENTS
PAGE PAGE
1 Warning -------------------------------------------------------------- 2
2 Specifications ----------------------------------------------------- 2
3 Troubleshooting Guide ----------------------------------------- 3
4 Trial Operation (After Checking Troubleshooting
Guide) ---------------------------------------------------------------- 7
5 Disassembly and Assembly Instructions ---------------- 8
6 Wiring Connection Diagram ---------------------------------16
7 Schematic Diagram ---------------------------------------------16
8 Exploded View and Replacement Parts List -----------17

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

4

5

6

7
4 Trial Operation (After Checking Troubleshooting Guide)
4.1. Hammer/Drill
Confirm the action when setting the H/D handle to HAMMER mode.
Rotation with hammering may work when the drill bit touches something like concrete or hard type of wood block. And confirm
the power.
It is OK, if it takes about 4-6 seconds by 20kgf to hole(Φ6×30)on the concrete.
Confirm the action when setting the H/D handle to DRILL mode.
No hammering when the drill bit touches something like concrete or hard type of wood block.
And confirm the forward and reverse side of rotation.
4.2. Switch
Change the rotation speed in proportion to the amount of pushing level on switch trigger.
0 ~ 1000rpm (14.4V)
0 ~ 1250rpm (18V)
4.3. Clutch
Check if the clutch torque changes suited for the number of clutch.
Check if the bit does not slip on Drilling mode.
4.4. Assembly
Confirm if there is NO gap between Housing A and B by pinching the lead wires.
Confirm all screws are tightened firmly and gaskets are attached.
There should be no metallic sound and abnormal sound.

8
5 Disassembly and Assembly Instructions
5.1. Disassembly Instructions
5.1.1. Remove chuck handle.
Take out a chuck cover and others in order.
5.1.2. Remove C-type spring and white felt.
1. Remove C-type spring.
2. Remove a felt with tweezers.
*Be careful not to break the felt.

9
5.1.3. Remove a clutch handle.
1. Remove snap ring.
2. Separate a clutch handle.

10
5.1.4. Remove the housing.
5.1.5. Remove the piston applying power spring.
*Be careful not to loose the spring when it is removed.

11
5.1.6. Remove a motor rotor assembly.
5.1.7. Take out the other blocks from the housing.
• Motor carbon brush assembly/switch assembly/control PCB/Intermediate shaft assembly
*Loose all blocks from the housing and then take out them.

12
5.1.8. Remove motor lead wires.
5.1.9. Separate each blocks.

13
5.1.10. Separate motor carbon brush assembly.
• Removal of the carbon brush assembly.
Hitch up two springs to the chase of carbon holder with tweezers.
5.1.11. Removal of the gear box block.

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5.2. Assembly Instructions
5.2.1. How to attach the terminal
5.2.2. How to reassemble spindle assembly and intermediate shaft assembly

15
5.2.3. Caution for assembly

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6 Wiring Connection Diagram
7 Schematic Diagram

Model No. : EY78A1 Exploded View
17
8 Exploded View and Replacement Parts List

Model No. : EY78A1 Parts List
Safety
Ref.
No. Part No. Part Name & Description Q'ty Remarks
1 WEY78A1H3078 HOUSING AB SET 1 (For Europe)
1 WEY78A1H3079 HOUSING AB SET 1 (For OCEANIA)
2 WEY6803L3997 SEAL A 1
3 WEY6803L3987 SEAL B 1
4 WEY6813H3117 CHUCK COVER 1
5 WEY6803K3127 CHUCK HANDLE 1
6 WEY6813L0427 BALL GUIDE 1
7 WEY6813L1917 STEEL BALL 1 φ7
8 WEY6813L0437 CHUCK SPRING STRIKE 1
9 WEY6813L0917 CHUCK SPRING 1
10 WEY6803L1167 C-TYPE RING 1
11 WEY6803L3137 FELT 1
12 WEY6803L0467 SNAP RING 1 ISTW42
13 WEY6803L0857 THRUST PLATE 1
14 WEY6803L1707 LOCK PIN 2
15 WEY78A1H3227 CLUTCH HANDLE 1
16 WEY6813L0477 SNAP RING 1 ISTW-25
17 WEY6803Y3297 CLUTCH CASE 1
18 WEY6813L4957 BEARING 1 6805LUX
19 WEY6803L0477 SNAP RING 1 RTW37
20 WEY6803L4067 SPINDLE ASSEMBLY 1
21 WEY6813L0327 O RING 1 P10A
22 WEY6813L0347 O RING 1 AS112
23 WEY7840L4907 CLUTCH ASSEMBLY 1
24 WEY6803L0087 CLICK PLATE 1
25 WEY7840L1247 PISTON ASSEMBLY 1
26 WEY6803L0977 O RING 1
27 WEY6803L0387 NEEDLE BEARING 1
28 WEY6803L4057 INTERMEDIATE SHAFT ASSEMBLY 1
29 WEY7840L1467 MOTOR ROTOR ASSEMBLY 1
30 WEY7840L1187 MOTOR STATOR ASSEMBLY 1
31 WEY7840L2307 MOTOR BRUSH ASSEMBLY 1
32 WEY6230L6027 SCREW FOR MOTOR 2 K3-6,(5PCS/PK)
33 WEY78A1L2008 SWITCH ASSEMBLY 1
34 WEY7880L2157 BATTERY TERMINAL BASE 1
35 WEY78A1L2118 MAIN PCB ASSEMBLY 1
36 WEY7840K3137 TRIGGER COVER 1
37 WEY6803L2337 LED COVER 1
38 WEY7840L2337 LED LIGHT 1
39 WEY7804K3338 OPERATION PANEL 1
40 WEY7880L3147 F/R HANDLE 1
41 WEY6803L0927 POWER SPRING 1
42 WEY6803L0137 CUSHION RUBBER 1
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Model No. : EY78A1 Parts List
Safety
Ref.
No. Part No. Part Name & Description Q'ty Remarks
43 WEY6230K9216 TORX TAPPING SCREW 14 K3-20,(5PCS/PK)
44 WEY7880L3417 SHOULDER BELT 1
45 WEY9HX403 BIT ADAPTOR 1
46 WEY7840K0208 FERRITE CORE 1
- WEY9L40R2788 BATTERY PACK COVER 1
- WEY78A1K7019 TOOL CASE 1
- WEY78A1K8108 OPERATING INSTRUCTIONS 1
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