Panasonic EY7420 User manual

© Panasonic Eco Solutions Power Tools Co., Ltd.
2013. All rights reserved. Unauthorized copying and
distribution is a violation of law.
Order Number PTD1302X20CE
Cordless Drill & Driver
Model No. EY7420
Europe
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

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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
2.1. MAIN UNIT
2.2. MAXIMUM RECOMMENDED CAPACITIES
2.3. BATTERY PACK
2.4. BATTERY CHARGER

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3 Troubleshooting Guide
(Refer to Wiring Connection Diagram)

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5

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3.1. Trial Operation (after checking Troubleshooting Guide.)
3.1.1. ASSEMBLY
1. Confirm if there is NO gap between Housing A and B by pinching the lead wires.
2. Confirm all screws are tightened firmly.
3. There should be no metallic sound and abnormal sound.
4. There is no dust or deformation on battery terminals.
5. Confirm if there is no dirt when reparing.
3.1.2. OPERATION
1. Confirm the forward and reverse side of rotation.
2. Confirm the smooth changing of HIGH and LOW handle and its changing mode.
3. Confirm if LED rights ON. Once battery pack is removed and attached, press the switch handle, otherwise LED does not right
ON.
4. Confirm the smooth sliding of bit holder and to hold the bit firmly.
5. Confirm if the rotation;
HIGH: 0-900 +150/-100 rpm LOW: 0-300 +50/-30 rpm
3.1.3. SWITCH
1. Confirm the rotation of speed if it changes in proportion to the amount of pushing level on switch handle.
2. Confirm if the rotation stops when releasing the switch handle.
3. Confirm if the auto-stop operation with clutch “5”
3.1.4. CLUTCH
1. Check if the clutch torque changes suited for the number of clutch.

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4 Disassembly and Assembly Instructions
Ref. No. 1A Procedure 1A Removal of the Housing.
1. Remove 7 housing screws.
2. Remove 7 screws.
3. Remove ring plate and ring.
4. Remove click spring on both housing A and B.
5. Loosen a nut.

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Ref. No. 2A Procedure 1A →2A Removal of Switch and Driving block.
1. Take out the switch assembly and the driving block.
2. Separate the motor from the gear box block by twisting the motor
to unlock tabs.
Ref. No. 2B Procedure 1A →2A →2B Removal of Control PCB.
1. Take out the connector from the control PCB.
NOTE:
Make sure hold the connector at the bottom area.

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Ref. No. 2C Procedure 1A →2A →2B →2C Removal of Battery terminal block.
1. Take out the connector from the battery terminal block with a
screw driver.
Ref. No. 2D Procedure 1A →2A →2B →2C →2D Removal and assembly of motor assembly.
(Removal)
1. Unsolder to take out the lead wires.
(Assembly)
1. Use the isolation type of soldering iron (less than 80W).
2. Solder within 3 seconds with less than 400°C.
NOTE:
lead-free solder (Sn-3Ag-0.5Cu).

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Ref. No. 2E Procedure 1A →2A →2B →2C →2D →2E Removal or assembly of detection PCB.
(Removal)
1. Take out the clutch handle.
2. Pull out the torque detection PCB from the gear box block.
(Assembly)
1. Insert the torque detection PCB into the groove of gear box block.
NOTE:
Make sure the direction of detection PCB.
2. Assemble the clutch plate.

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Ref. No. 2F Procedure 1A →2A →2B →2C →2D →2E →2F Disassembly of gear box block.
1. The internal parts of gear box block can be disassembled in order.
Ref. No. 2G Procedure 1A →2A →2B →2C →2D →2E →
2F →2G
ssembly of the Adjusting Screw.
1. Hold the gear box block with the small projection on top, and align
the largest projection of adjusting screw.
NOTE:
Make sure 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 until the end of spring
comes the same line as the largest projection of adjusting screw for
clockwise direction.

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Ref. No. 2H Procedure 1A →2A →2B →2C →2D →2E →
2F →2G →2H
Check point on wiring.

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Ref. No. 2I Procedure 1A →2A →2B →2C →2D →2E →
2F →2G →2H →2I
Check point on assembly.

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5 Wiring Connection Diagram
6 Schematic Diagram

Model No. : EY7420 Exploded View
7Exploded View and Replacement Parts List
15

Model No. : EY7420 Parts List
Safety
Ref.
No. Part No. Part Name & Description Q'ty Remarks
1 WEY7420H3078 HOUSING AB SET 1
2 WEY7420L1087 GEAR BOX BLOCK 1
3 WEY7420L3747 MOTOR MOUNTING PLATE 1
4 WEY6225L6026 SEMS SCREW 2 (M3*5)
5 WEY7420L0637 CLUTCH HANDLE 1
6 WEY7410H3237 H/L CHANGE HANDLE 1
7 WEY7420L1007 DC MOTOR 1
8 WEY7420L2127 TORQUE DETECTION PCB 1
9 WEY7420L2117 MAIN PCB ASSEMBLY 1
10 WEY7420L2337 LED ASSEMBLY 1
11 WEY7420K2008 SWITCH ASSEMBLY 1
12 WEY7420L4127 TERMINAL BASE ASSEMBLY 1
13 WEY6605L9626 TAPPING SCREW 2 (2.6*8)
14 WEY6402K9217 TAPPING SCREW 7 (K3*16)
15 WEY6225L0176 CLICK SPRING 2
16 WEY7420L0057 HOOK RING 1
17 WEY7420L0167 RING PLATE 1
18 WEY7542H3247 F/R SELECTOR HANDLE 1
19 WEY7420L6417 NUT 1 (M3)
- WEY9L20R2787 BATTERY PACK COVER 1
- WEY7420K7018 TOOL CASE 1
- WEY7420K8108 OPERATING INSTRUCTIONS 1
- WEY6705X5527 SUNLIGHT GREASE 1
- WEWGW2 FLOIL GREASE 1
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