EGO LB5300E User manual

REPAIR GUIDELINE
Blower_LB5300E
Version: 1
Issue Date: 2016/02/25

Table of Contents
NO. Contents Page
1 Troubleshooting 3
2 Tool list 4
3 How to disassemble the blower 5-20
4 How to replace the PCBA 21-34
5 How to replace the Motor & Ducted Assembly 35-40
6 How to assemble the blower 41-43
2

Troubleshooting
Problem
Possible Cause
Fault Position
Test & Solution
Fail to start
PCBA is damaged.
PCBA in Handle
Replace PCBA in the handle.
Motor is damaged.
Motor in Ducted
Assembly
Measure the resistance between any
two of the three cables in the motor
and ducted assembly by using a
multimeter.
If the resistance is infinite, replace
the motor and duct assembly.
Press the boost button/air
velocity adjusting knob when the
blower runs, the air velocity and
the volume doesn’t change.
PCBA is broken
PCBA in Handle
Replace PCBA in the handle.
The air velocity and the volume
are decreased compared with
normal use.
The fan in the duct is
over-worn
Fan in Ducted
assembly
Open the handle housing , take off
the fan baffle and check the fan. If
the fan is over-worn, replace the
motor and duct assembly.
3

Tool List For Repair
NO. Tool List SPEC Remark
1 Magnetic bits
2 Utility knife To remove the label
3 Heat gun
4 Heat -shrinkable sleeves Φ7 mm
5 Scissors To remove the shrinkable sleeve
6 Multimeter
7 Capacitor discharging fixture
4

5
1. Remove the air velocity indication label.
Air Velocity
Indication Label
How to disassemble the blower

Four Screws
2. Remove the 4 screws to disassemble the base assembly.
6
Description
Part Number
Tapping Screw 5610032004
Base Assembly 2824381001
BaseAssembly
How to disassemble the blower

How to disassemble the blower
7
3. Remove the 8 screws and open the handle housings.

How to disassemble the blower
8
Fan Baffle Right Housing Motor & Duct Assembly
4. Remove the Fan Baffle.
5. Loosen the 2 screws in the right housing and remove the right housing.

How to disassemble the blower
9
Description
Part Number
Description
Part Number
Battery Release Button
3127201001
Static Dissipation Assembly
2824406001
Latch
3127202001
Anti-static Bar
3650142001
Battery Ejection Lever
3127206001
Left Handle Housing
3321366001
Speed Adjusting Knob
3127215001
Right Handle Housing
3321365001
Boost Button Level
3128066001
Handle Housing Set
2824414001
Trigger Level
3128069001
Left Housing 3321362001
PCBA
2830105001
Right Housing 3321361001
Spring 1
3660088003
Housing Set 2824413001
Spring 2
3660013003
Motor & Duct Assembly 2824335002
Spring 3
3660129002
Fan Baffle 3128068001
Rubber Gasket 5650519001
The following parts can be replaced after opening the housings.

How to disassemble the blower
10
Battery Release
Button
Latch
Anti-static Bar
Trigger Level
Boost Button Level
PCBA
Speed Adjustment Knob
Battery Ejection Lever
Static Dissipation
Assembly
Spring 2
Spring 1
Spring 3
Left Handle
Housing
Left Housing
Motor & Duct Assembly
Fan Baffle
Right Housing
Rubber Gasket

How to disassemble the blower
11
6. Take out the PCBA from the left handle housing.
PCBA
Connectors

How to disassemble the blower
12
7. Remove the heat-shrinkable sleeves, move the transparent sleeve aside and
separate the three connectors.

How to disassemble the blower
13
8. Test the motor assembly to judge if it is open-circuit.
a) Set the multimeter function to “Resistance
measuring” .
b) Measure the resistance between any of the
two connectors.
c) If any of the measurements are infinite, means
the circuit between the two connectors are
open circuit, the motor is damaged. Follow the
procedure “How To Replace the motor and
dust assembly” to replace a new one.
Otherwise go to the next testing step.
Measure the resistance
between any of the two
connectors

How to disassemble the blower
14
9. Test the PCBA to judge if it is broken.
1) Discharge the capacitor which is connected in the PCBA assembly.
a) Connect the electrical contacts into the discharging fixture.
b) Press the main switch trigger and hold for about 10s to discharge the capacitor.
Capacitor discharging fixture Capacitor Main switch

How to disassemble the blower
15
2) Measure the Fuse in the PCBA.
Fuse

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16
a) Set the multimeter function to “Resistance measuring” .
b) Pierce one pen pin of the multimeter into the sealing glue and force the pin
contacting onto one end of the fuse, then pierce another pen pin into the
sealing glue and contacting onto the other end of the fuse.
c) If the resistance is 0, means a good fuse, go to the next testing step; otherwise
means a broken fuse.
d) If the fuse is broken, follow the procedure “How To Replace the PCBA” to
replace a new PCBA.

How to disassemble the blower
17
3) Measure the MOSFET in the PCBA (Step 1).
a) Set the multimeter function to “Diode
measuring” .
b) Contact the red pen pin to the negative electric
contact (the metal plate that connects to black
wire).
c) Contact the black pen pin to the three
connectors separately and measure the voltage.
d) If the LCD displays 0.45~0.55V for each
measurement, go to the next testing step,
otherwise means the PCBA is broken. Follow
the procedure “How To Replace the PCBA” to
replace a new PCBA.

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18
Black pen pin
Red pen pin Negative electric contact
Three contactors
Black wire
Figure showing how to measure the MOSFET in the PCBA (Step 1)

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4) Measure the MOSFET in the PCBA (Step 2).
a) Keep the multimeter function setting at “Diode
measuring”.
b) Contact the black pen pin to the positive
electric contact (the metal plate that connects
to red wire).
c) Contact the red pen pin to the three
connectors separately and measure the voltage.
d) If the LCD displays 0.45~0.55V for each
measurement, the PCBA is OK, otherwise
means the PCBA is broken. Follow the
procedure “How To Replace the PCBA” to
replace a new PCBA.

How to disassemble the blower
20
Red pen pin contacting to the three
contactors separately
Black pen pin
Positive Electric contact Red wire
Figure showing how to measure the MOSFET in the PCBA (Step 2)