Hakko Electronics 475 User manual

®
Desoldering Tool
Instruction Manual

Thank you for purchasing the HAKKO 475 desoldering tool.
Please read this manual before operating the HAKKO 475.
Keep this manual readily accessible for reference.

Table of Contents
1. Packing List ................................................................ 1
2. Precautions ................................................................. 2
3. Part Names (Desoldering Gun) .............................. 3
(Station) ............................................. 4
4. Operation (Preparation-
Assembly and Connection) ......... 5 • 6
(Desoldering) ................................ 7 • 8
(Cleaning during Operation) .............. 9
(Problems during Desoldering)
(Post-operation Maintenance) ......... 10
(Troubleshooting Guide) ...................11
5. Maintenance (Desoldering Gun).....................12 ~ 14
(Station) .................................... 15 • 16
6. Replacement Parts
(Replacing Heating Element) .... 17 • 18
7. Parts List (Station) .................................... 19 • 20
(Desoldering Gun) ............................ 21
8. Specifications ........................................................... 22
9. Wiring ....................................................................... 22

2. Precautions
2
In this instruction manual, “WARNING” and “CAUTIONS” are defined as follows.
WARNING
WARNING: Misuse may potentially cause death of, or serious injury to the user.
CAUTION : Misuse may potentially cause injury to the user or physical damage
to the objects involved.
For your own safety, be sure to comply with these precautions.
CAUTION
When the power is on, the nozzle temperature is between
380°C/716°F and 480°C/ 896°F.
Since mishandling may lead to burns or fire, be sure to comply with
the following precautions.

Do not touch the metallic parts near the nozzle, nearby plastic parts and the
spring iron holder.

Do not use the product near flammable items.

Advise other people in the work area that the unit can reach a very high tem-
perature and should be considered potentially dangerous.

Turn the power off while taking breaks and when finished using the unit.

Before replacing parts or storing the unit, turn the power off and allow the unit
to cool to room temperature.

This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience and
knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.

Children should be supervised to ensure that they do not play with the appli-
ance.
To prevent damage to the unit and ensure a safe working environ-
ment, be sure to comply with the following precautions.

Use clean, filtered air as the fluid. With the trigger pulled and air flowing,
adjust the pressure to between 490 to 686kPa(5.0 to 7.0kgf/cm2)

Do not use the unit for applications other than desoldering.

Do not rap the desoldering gun against the work bench to shake off residual
solder, or otherwise subject the iron to severe shocks.

Do not modify the unit.

Use only genuine HAKKO replacement parts.

Do not wet the unit or use the unit when your hands are wet.

Set the ceramic paper filter (S) for the filter retainer (station), and the ceramic
paper filter (L) for the filter pipe (gun).

Maintain the desoldering gun and the station.

While using the unit, donʼt do anything which may cause bodily harm or physi-
cal damage.

3. Part Names
3
 Desoldering Gun
(Refer to p.19, 20 & 21 for part nos.)
Nozzle
Transmits heat for melting solder, En-
trance for melted solder.
Expendable part.
Heating Element
Inside requires cleaning.
Trigger
Squeeze to start absorption.
Do not pull the trigger before
fully heating the nozzle.
Filter Pipe
Set the ceramic paper filter (L) (No.A1033).
Contains melted solder and flux using filters.
Filters are expendable parts. Back Holder As-
sembly
Secures the filter
pipe.
Release Knob
Push down to remove
the filter pipe.
Indicator
Indicates when nozzle
and heating element
need cleaning and
when filters need
replacing.
(refer to p.9)
Hose
Connects to the vacuum outlet
cap (station).
Cord Assembly
Connects to the receptacle (station).

 Station
4
Temperature Control Knob
Provides nozzle temperature con-
trol. (refer to p.7)
Temperature Control Set
Screw Clamp
Prevents the temperature con-
trol knob from being reset.
(refer to p.7)
Vacuum Outlet Cap
Set the ceramic paper filter (S) (No.
A1009).
Connects with the hose. Filter inside
vacuum outlet cap is expendable.
Receptacle
Connector for the cord
assembly.
Power Lamp
Lights up when the
power switch is
turned to ON.
Power Switch
When turned to ON, the
heating element starts
to heat up.
CAL (Calibration)
Used for calibrating
the temperature after
replacing the heating
element.
Power Cord
Fuse Holder
• 100, 110V unit
contain 125V-2A fuse.
• 120V unit contains
250V-2A (U) fuse.
• 220, 230V unit contain
250V-1A fuse.
• Australian 240V unit
contains 250V-1A
S
fuse.
Female Connector
Supplier inlet compresser air
Tapered screw; PT 1/8

5
4. Operation
Tube(red)
Securely insert the
cleaning pin holder.
Preparation-Assembly and Connection
Assemble the HAKKO 474 on a flat surface.
1 Assemble the iron holder.
• Set the spring iron holder and
cleaning pin holder in the iron
holder base.
• Dampen the cleaning sponge
with water and then squeeze it
dry.
CAUTION
The sponge is compressed.
It will swell when moistened with
water.
Be sure to dampen the sponge with
water before use.
Be sure to remove the round portion
of the sponge.
2 Insert the desoldering
gun and cleaning pins.
• Fully insert the desoldering gun
into the spring iron holder.
CAUTION
The spring iron holder becomes
extremely hot during operation of
the desoldering gun. Do not touch
the spring iron holder during and
immediately after using the gun.
3 Connections
CAUTION
Be sure to turn off the power switch
before connecting or disconnecting
the cord assembly and the power
plug. Failure to do so may damage
the P.W.B.
• Connect the cord assembly to the
receptacle (marked “IRON”).
• Connect the hose to the vacuum
outlet cap (marked “VACUUM”).
Insert the cord
assembly by keying
the plug to the key
on the receptacle.
Secure the plug by
turning it clockwise.
Fully insert the hose
into the vacuum outlet
cap.
Spring Iron Holder
(No.B1094)
Cleaning Pin Holder
(No.B1095)
Iron Holder Base
Cleaning Sponge

5 Power switch
• Confirm that the power switch is
set in the OFF position, then con-
nect the power plug to the power
source.
CAUTION
The entire unit is constructed of con-
ductive materials. Always ground the
unit.
• Turn the power switch to ON.
The power lamp should light up.
• The nozzle begins to heat up
as soon as the power switch is
turned to ON.
6 After turning the power
switch to ON, wait 3
minutes before beginning
desoldering operations.
6
The power lamp doesnʼt light
up.
1. Is the power cord properly con-
nected?
2. Is the fuse blown?
The nozzle doesnʼt heat up.
1. Is the cord assembly properly
connected?
2. Is the heating element broken?
The power lamp
lights up.
The nozzle heats up.
CAUTION : The desoldering gun must be placed in the
iron holder when not in use.
4 Connect to the compresser.
• Use filtered air without any dust,
oil and moisture.
• With the trigger pulled and air
flowing, adjust the regulator air
pressure to 490kPa(5.0kgf/cm2).
The absorption power of the unit will
be reduced if adjustment is made
while air is not flowing or if the tube is
not measured as specified.
Do not set the regulator to pressure
of 882kPa (9kgf/cm2) or more while
the trigger is not pulled, as such
pressures can damage various parts
of the HAKKO 475 station.
CAUTION
Connections
Station
Male Connector:
pipe thread 1/8 Compressor
Regulator:
adjust to
490kPa
(5.0kgf/cm2)
Air Filter:
filter out dust,
oil and moisture.
Tubing:
must have a diameter of more
than ø0.17 in. and a length of
less than 9.5 ft.
CAUTION
Use the air filter. Dust, oil and
moisture can adhere to
the solenoid valve in the pipe
without it. This may result in
damage to the unit.

7
4. Operation
Desoldering
After turning the power switch to ON,
wait 3 minutes before begin-
ning desoldering operations.
1 Set the temperature.
CAUTION
Always set the temperature to as low
as possible for the work being done.
• To more precisely set the temper-
ature, measure the temperature
at the nozzle using a soldering
iron thermometer and adjust the
temperature control knob accord-
ingly.
We recommend the HAKKO FG-100
thermometer or HAKKO FG-101
soldering tester for measuring the
nozzle temperature.
• The temperature control knob
can be secured by tightening the
temperature control set screw
clamp (“+” screw) at the top of the
HAKKO 475 unit.
2 Clean the tip of the nozzle.
• Keep the solder-plated section
of the nozzle a shiny white by
coating it with a small amount of
solder.
If the tip of the nozzle is coated with
oxide, the nozzleʼs heat conductivity
will be lowered.
Coating the tip with a small amount
of fresh solder ensure maximum
heat conductivity.
Lock
Unlock
Secure the temperature
control set screw clamp
with a cross point screw-
driver.
Wipe away any oxide or old solder
from the nozzle using the hole in the
center of the sponge.
The temperature can be adjusted between 380°C (716°F)
and 480°C (896°F) with temperature control knob.
Please refer to the chart below, and adjust the tempera-
ture control knob.
knob
1 and 2
3 and 4
5 and 6
P.W.B.
Single-sided P.W.B.
Through-hole P.W.B.
Multilayer P.W.B.
CAUTION
Never insert the cleaning pin
in the hole of temp. control set
screw clamp.
As this may result in damage to
the unit.

8
3 Melt the solder.
• Apply the nozzle to the soldered
part and melt the solder.
CAUTION
Never allow the nozzle to touch the
board itself.
• Confirm that the solder is melted.
CAUTION
To confirm that all solder is melted,
observe the inside of the hole and
the backside of the P.W.B. If this is
difficult to do, try slowly moving the
lead with the nozzle – If the lead
moves, the solder is melted.
CAUTION
Never move the lead by force. If it
doesnʼt move easily, the solder isnʼt
yet fully melted.
4 Absorb the solder.
• After confirming that the solder
is completely melted, absorb the
solder by squeezing the trigger on
the gun.
CAUTION
Never leave any solder remaining
inside the hole in the P.W.B.
• After fully absorbing all the solder,
cool the soldering junction in
order to prevent it from becoming
resoldered.
5 Problems during
desoldering.
• If solder remains, resolder the
component and repeat the desol-
dering process.
Nozzle
P.W.B.
Solder
Lead
Slowly move
the lead with
the nozzle.
Absorb the solder by slowly
moving the lead back and
forth with the tip of the
nozzle.

9
4. Operation
Heated solder and flux can cause oxides to form and adhere to the nozzle
and the inside of the heating element. These oxides not only lower the
heat conductivity, but can also clog the nozzle and heating element, result-
ing in a drop in suction efficiency. Should there be a noticeable drop in
suction efficiency during operation, replace the filter and clean the nozzle
and heating element with the provided cleaning pin.
Cleaning during Operation
1 Observing the indicator
While looking at the indicator
and with the hole of the nozzle
open, pull the trigger and look
at the indicator. If it is red, clean
the nozzle and heating element,
empty the filter pipe, and replace
the filters. If the indicator is blue,
cleaning is not necessary and
operations can be resumed.
CAUTION
The indicator will not operate ac-
curately if the hole of the nozzle is
closed or if the solder in the hole of
the P.W.B. is not melted.
CAUTION
The indicator on the HAKKO 474
reads in a different way.
For instruction on the reading the
HAKKO 474 indicator, please refer to
the HAKKO 474 instruction manual.
2 Replacing the filter
Replace the filter as shown A to C.
During operation, the filter pipe is
very hot. Wait until the filter pipe
is cool before replacing the filter.
We recommend keeping a second
filter pipe containing new filters
handy, and replacing the installed
filter pipe with this backup filter
pipe.
A Replace the entire filter pipe
with he provided backup filter pipe. B Pull
C Down
Normal
One-half or
less of rthe
indicator is red.
Abnormal
Three-fourths
of the indicator
is red.
Solution
If three-fourths or more of
the indicator is red, replace
the filter and clean the
nozzle and the inside of
the heating element.
(refer to p.12 Maintenance
of the Desoldering Gun)
CAUTION : If there is a noticeable drop in suction
efficiency, clean the nozzle and heating ele-
ment with the cleaning pin.