Panasonic EYFLA4AR User manual

© Panasonic Corporation 2016
Unauthorized copying and distribution is a violation
of law.
Order Number PTD1601E08CE
Cordless Impact Driver / Cordless Impact Wrench
Model No. EYFLA4AR
EYFLA5AR
(Cordless Impact
Driver)
Model No. EYFLA5QR
EYFLA6JR
(Cordless Impact
Wrench)
Europe
TABLE OF CONTENTS
PAGE PAGE
1 Warning -------------------------------------------------------------- 2
2 Specifications ----------------------------------------------------- 2
3 Troubleshooting Guide ----------------------------------------- 3
4 Service Fixture and Adjustment----------------------------- 6
5 Disassembly and Assembly Instructions ---------------12
6 Measurements and Adjustments---------------------------21
7 Wiring Connection Diagram ---------------------------------24
8 Schematic Diagram ---------------------------------------------25
9 Exploded View and Replacement Parts List -----------26

2
1Warning
Caution:
• Pb free solder has a higher melting point that standard solder; Typicall 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
4 Service Fixture and Adjustment
4.1. Check Parts Identify Procedure

7

8

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4.2. Initializing and Setting
NOTE:
• This section explains how to revert all tool settings to their default values at the time of shipment from the factory.
• The error display will be turned off.
INITIALIZING ALL SETTINGS.
1. Set the tool to configuration mode.
(See the next procedure SETTINGS THE TOOL TO
CONFIGURATION MODE.)
2. Press the format button.
a. The control panel will begin flashing.
DISPLAY: The letter “F” flashes on and off.
BATTERY INDICATION LAMP: The upper and lower
bars of the battery flash on and off.
3. Press the OK button to accept the selected setting.
a. The control panel will stop flashing and light up.
SETTINGS THE TOOL TO CONFIGURATION MODE.
1. Turn off the control panel.
If the control panel is on, remove and then reinsert the
battery pack.
2. Engage the switch while pushing the button and then
release both the button and the switch.
a. After all the LED lamps have turned off, the control
panel will flash and change to configuration mode.

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CONFIGURING THE TORQUE CLUTCH SETTING.
1. Press the (+) and (-) buttons to select the clutch setting
that is appropriate for the work being performed.
a. “F” indicates that the torque control function is off.
b. You can select from 30 torque clutch settings (1 to
30).
2. Press the OK button to accept the selected torque clutch
setting.
a. The control panel will stop flashing and light up.
NOTE:
You must press the OK button in order for the selected
setting to take effect.
SETTING THE SNUG POINT DETECTION LEVEL.
1. Press the torque setting mode button.
a. The snug point detection level setting value will be
displayed.
2. Press the (+) and (-) buttons to set the best snug point
detection level for the work you are performing.
3. Press the OK button to accept the number of torque
stages and the snug point detection level.
a. The tool’s panel will flash and then light up continu-
ously.

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CAUTION:
1. Set the snug point detection level from "L1". Setting the snug point detection level from "L2" may result in cracking or defor-
mation of the target material.
2. If the tool stops before the snug point at snug point detection level "L1", set the snug point detection level to "L2".
3. Changing the snug point detection level from "L1" to "L2" may increase the torque. Set the number of torque stages again
after making this change.
4. The setting will not be changed until you press the OK button.
5. After changing the setting, be sure to check the new setting value.
IMPORTANT INFORMATION:
1. You can set the snug point detection level and retightening prevention time at the same time by changing the retightening pre-
vention time before pressing the OK button and then pressing the OK button.
2. Pressing the torque setting mode button toggles the display between the snug point detection level setting value and the num-
ber of torque stages setting value.
3. The tool ships with the snug point detection level set to "L1".
4. When the number of torque stages has been set as shown below, the snug point detection level cannot be switched from "L1"
to "L2".

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5 Disassembly and Assembly Instructions
5.1. Disassembly Instructions
Ref. No. 1A Procedure 1A Removal of the Housings.
1. Remove four screws where tightening fixation cover.
2. Pull off the fixing cover assembly.
3. Once removing the fixing cover, the driving shaft assembly may come
out.
Ref. No. 1B Procedure 1A 1B Removal of bit holder.
(EYFLA4A and EYFLA5A only)
1. Remove C-type ring by the stop ring pliers.
2. Once removing C-type ring, thrust plate, bit holder spring, bit holder
and steel balls may come out.

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Ref. No. 1C Procedure 1A 1B 1C Removal of housing.
1. Remove nine housing screws.
2. Then open the housing A and B.
NOTE:
When opening the housings, make sure that the main PCB is on the
housing A.
If the main PCB sticks in the housing B and pull it out from the hous-
ing A, the ribbon cable may be defected.
NOTE:
The housing A and B is tightened as themotor mounting base is joint
fitting.
Hold the housing B and take it out vertically.
Ref. No. 1D Procedure 1A 1B 1C 1D Removal of ribbon cable.
1. Slightly lift up the connector.
NOTE:
Do not pull the connector firmly because it is not able to take out
completely.
2. Take out the ribbon cable.

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Ref. No. 1E Procedure 1A 1B 1C 1D 1E Removal of motor assembly.
1. Separate the motor assembly from the driving shaft assembly.
2. Take out the motor rotor assembly from the motor stator.
NOTE:
Make sure not to damage the magnet by motor rotor.
NOTE:
Make sure not to scratch FET circuit by motor rotor.
Ref. No. 1F Procedure 1A 1B 1C 1D 1E 1F Removal of Driving shaft assembly.
1. Take out two steel balls by pressing with vise.
NOTE:
Set another hammer on the reverse side next to the original ham-
mer.
When pressing the driving shaft assembly by vise, do not take out
the planet gear. If failure to do so it may crack the shaft.
2. Pull out two steel balls.
3. After removing steel balls, the assembled parts can be removed one
after another.
Hammer 29pcs of Steel balls Thrust plate Thrust plate Cush-
ion rubber Hammer spring Spring fixing plate
balls may fall down.
4. Take out the pins something like a magnet and planet gears.

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5.2. Reassembly Instructions
Ref. No. 2A Procedure 2A Assembly of Motor.
1. Confirm if the metal powder is stuck around the rotor. If so, take out
by something like packaging tape.
2. Insert the motor rotor into the stator.
Ref. No. 2B Procedure 2A 2B Assembly of Driving shaft assembly.
1. Assemble the individual part in reverse order of disassembly.
2. Apply the grease (DOUBREX / WEY002X8977) on the hammer and
the driving shaft.

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Ref. No. 2C Procedure 2A 2B 2C Assembly of Module assembly.
1. Set the DIP switch on the main circuit board with a toothpick.
NOTE:
Do not use a metal pick.
Condition varies with the torque (by model).
NOTE:
Confirm if "LAR" is printed on the main PCB.

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Ref. No. 2D Procedure 2A 2B 2C 2D Assembly of Switch and Motor assembly.
1. Attach the quick connect terminal of the white lead wire from the
motor stator with the switch assembly (M+).
2. Apply grease (FLOIL AH-137N-2 / WEWGW2) on the both side and
both end of ribbon cable where insert into the connectors.
NOTE:
Confirm if there is no dust or any foreign substances.
3. Slightly lift the connector up.
NOTE:
Do not pull the connector forcefully. It does not separate from the
other connector.
4. Insert the ribbon cable into the motor stator and the main PCB.
NOTE:
Make sure to handle the ribbon cable gently in order to avoid the
breakage.
5. Insert the quick connect terminal of motor lead wire (black) into the (-)
side of terminal block.
6. Insert the connector of harness into the main PCB.
7. Connect the black lead wire into the (-) side of terminal block and the
read lead wire goes to (+) side of terminal block.

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Ref. No. 2E Procedure 2A 2B 2C 2D 2E Assembly of Switch and Motor assembly.
1. Apply grease (FLOIL AH-137N-2 / WEWGW2) on the connector of
transmitter and insert it into the main PCB.
2. Place the transmitter onto the housing.
3. Place the wire along the ribbon cable.
4. Slightly lift up the LED assembly and set the wire of transmitter under
the LED assembly.
NOTE:
Confirm if the lead wires and the ribbon cable fit the properly without
getting caught in.
When wrapping the transmitter in a cushion, place the transmitter and
keep the space showed with a halftone on a left side of figure sown
below.
Locate the wire of transmitter on the corner. Make sure that the corner of
board does not come out and wrapped completely.

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Ref. No. 2F Procedure 2A 2B 2C 2D 2E 2F Assembly of Driving assembly.
1. Confirm to attach the fixing rubber on Housing B.
2. Insert the motor and driving shaft assembly into the housing.
3. Confirm to set the motor lead wire (red) under the black lead wire and
confirm if there is no pinching with switch.
4. Place the battery terminal lead wire (black) is over the wire (red) prop-
erly.
NOTE:
Press fit the lead wires firmly.
Place the ribbon cable properly without getting caught in the lead
wires.

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Ref. No. 2G Procedure 2A 2B 2C 2D 2E 2F
2G
Assembly of Driving assembly.
1. Close the housing A and B.
2. Tighten nine housing screws.
3. Apply the grease (DOUBREX / WEY002X8977) all around the anvil.
4. Assemble the slider to the clutch handle. Confirm it has its own direc-
tion.
5. Place the anvil into the clutch handle.
6. Apply the grease (DOUBREX / WEY002X8977) on the rear side of fix-
ation cover.
7. Attach the fixation cover.
8. Tighten four screws.