Hakko Electronics 474 User manual

CAUTION : Remove the pump securing screws (M4x25 marked red)
from the bottom of the station.
Failure to do so may result in serious problems.
Desoldering Tool
Instruction Manual
Thank you for purchasing the HAKKO 474 Desoldering
Tool.
Please read the manual before using the HAKKO 474.
Store the manual in a safe, easily accessible place for
future reference.
Packing List··················································
Precautions··················································
Part Names
Operation
Maintenance
Replacement Parts
Parts List
Specifications, Wiring·······························
(Desoldering Gun)···················
(Station)···································
(Preparation-
Assembly and Connection) ······
(Desoldering)························
(Cleaning during Operation) ········
(Problems during Desoldering )
( Post-operation Maintenance )···
(Troubleshooting Guide)········
(Desoldering Gun)············
(Station)····························
(Replacing Heating Element) ····
(Station)···························
(Desoldering Gun)·················
10
11
21
22
Table of Contents
1
2
3
4
9
5·6
7·8
12~14
15~16
17~18
19~20

SpannerStation
Iron Holder Base Spring Iron Holder Cleaning Sponge
Filter Pipe
Ceramic Paper Filter (S)
Ceramic Paper Filter (L) Spring Filter
Cleaning Pin for Ø1.0 mm (0.04 in) Nozzle
Cleaning Drill for Ø1.0 mm (0.04 in) Nozzle
Cleaning Pin for Heating Element Cleaning Pin Holder
Silicone Grease Desoldering Gun
1
Packing List Please check to make sure that all the items listed below
are included in the HAKKO 474 package.
Station····················································
Desoldering Gun····································
Iron Holder Base····································
Spring Iron Holder··································
Cleaning Sponge····································
Filter Pipe···············································
1
1
1
1
1
1
Ceramic Paper Filter (S)·····································
Ceramic Paper Filter (L)·····································
Spring Filter·······················································
Cleaning Pin (for Ø1.0mm [0.04 in] nozzle)········
Cleaning Pin (for Heating Element)····················
Cleaning Pin Holder············································
Cleaning Drill (for Ø1.0mm [0.04 in] nozzle)·······
SIlicone Grease··················································
Spanner······························································
Instruction Manual··············································
2
4
3
1
1
1
1
1
1
1

2
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
temperature 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.
To prevent damage to the unit and ensure a safe working
environment, be sure to comply with the following precautions.
·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, don't do anything which may cause bodily harm
or physical damage.
Precautions
In this instruction manual, "WARNING" and "CAUTION" 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
Remove the pump securing screws (M4 x 25 marked red)
from the bottom of the station.
Failure to do so may result in serious problems.

Desoldering Gun
3
(Refer to p.19,20,21 for part nos.)Part Names
Cord Assembly
Connects to the receptacle (station).
Hose
Connects to the vacuum outlet cap (station).
Trigger
Squeeze to start absorption.
Do not pull the trigger before
fully heating the nozzle.
Heating Element
Inside requires cleaning.
Nozzle
Transmits heat for melting solder.
Entrance for melted solder.
Expendable part
Filter Pipe
Set the ceramic paper filter (L) (No. A1033).
Contains melted solder and flux using filters.
Filter are expendable parts.
Back Holder
Assembly
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)

Station
4
Temperature Control Knob
Provides nozzle temperature
control. (refer to p.7)
Temperature Control Set
Screw Clamp
Prevents the temperature
control knob from being reset.
(refer to p.7)
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.
Receptacle
Connector for the cord
assembly.
Vacuum Outlet Cap
Set the ceramic paper filter (S)
(No, A1009).
Connects with the hose, Filter
inside vacuum outlet cap is
expendable.
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.
Power Cord

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.
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.
Preparation-Assembly and Connection
Assemble the HAKKO 474 on a flat surface.
Remove the pump securing
screws (M 4 x 25 marked red)
from the bottom of the station.
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.
Insert the desoldering gun
and cleaning pins.
·Fully insert the desoldering
gun into the spring iron holder.
5
Operation
Spring Iron Holder
(No. B1094) Cleaning Pin Holder
(No. B1095)
Securely insert the
cleaning pin holder.
Cleaning Sponge
Iron Holder Base
Tube (red)

Secure the plug by
turning it clockwise.
Fully insert the hose
into the vacuum
outlet cap.
Insert the cord
assembly by keying
the plug to the key
on the receptacle.
The power lamp
lights up.
The nozzle heats up.
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.
CAUTION
The entire unit is constructed of
conductive materials. Always ground
the unit.
CAUTION :
The desoldering gun must be placed in the iron
holder when not in use.
The power lamp doesn't
light up.
1. Is the power cord properly
connected?
2. Is the fuse blown?
The nozzle doesn't heat up.
1. Is the cord assembly
properly connected?
2. Is the heating element
broken?
Connections
·Connect the cord assembly to
the receptacle (marked "IRON").
·Connect the hose to the
vacuum outlet cap (marked
"VACUUM").
Power switch
·Confirm that the power switch
is set in the OFF position, then
connect the power plug to the
power source.
·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.
After turning the power
switch to ON, wait 3
minutes before beginning
desoldering operations. 6

Lock
Unlock
Secure the temperature
control set screw clamp
with a cross point screwdriver,
Wipe away any oxide or old solder
from the nozzle using the hole in
the center of the sponge.
Always set the temperature to as low
as possible for the work being done.
CAUTION
Never insert the cleaning pin in the
hole of temp. control set screw clamp.
As this may result in damage to the
unit.
CAUTION
Desoldering
After turning the power switch to
ON, wait 3 minutes before begin-
ning desoldering operations.
·The temperature control knob
can be secured by tightening
the temperature control set
screw clamp (Ò+ Ó screw) at
the top of the HAKKO 474 unit.
·To more precisely set the tem-
perature, measure the temper-
ature at the nozzle using a
soldering iron thermometer and
adjust the temperature control
knob accordingly.
Set the temperature.
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.
We recommend the HAKKO
191 thermometer or HAKKO
192 soldering tester for
measuring the nozzle tem-
perature.
If the tip of the nozzle is
coated with oxide, the
nozzle's heat conductivity
will be lowered.
Coating the tip with a small
amount of fresh solder
ensures maximum heat
conductivity.
knob P.W.B.
1 ~ 2
5 ~ 6
3 ~ 4 Single-sided P.W.B. Through-hole P.W.B.
Multilayer P.W.B.
Please refer to the chart below, and adjust
the temperature control knob.
The temperature can be adjusted between
380˚C (716˚F) and 480˚C (896˚F)
with temperature control knob.
7
Operation

Never allow the nozzle to touch the
board itself.
CAUTION
To confirm that all the 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
doesn't move easily, the solder isn't
yet fully melted.
CAUTION
Never leave any solder remaining
inside the hole in the P.W.B.
CAUTION
·Apply the nozzle to the soldered
part and melt the solder.
·Confirm that the solder is
melted.
Melt the solder.
Absorb the solder.
·After confirming that the solder
is completely melted, absorb
the solder by squeezing the
trigger on the gun.
·After fully absorbing all the
solder, cool the soldering junc-
tion in order to prevent it from
becoming resoldered.
·If solder remains, resolder the
component and repeat the
desoldering process.
Problems during
desoldering
8
Absorb the solder by slowly
moving the lead back and
forth with the tip of the
nozzle.
Slowly move
the lead with
the nozzle.
Nozzle
P.W.B.
Solder
Lead

The indicator will not operate accurately
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 475 reads
in a different way.
For instructions on the reading the
HAKKO 475 indicator, please refer to
the HAKKO 475 instruction manual.
CAUTION
If there is a noticeable drop in suction
efficiency, clean the nozzle and heating
element with the cleaning pin.
CAUTION :
Normal Abnormal Solution
Blue or slight
amount of red
can be seen.
More than half
of the indicator
is red.
If the indicator is more
than half red, replace
the filter and clean the
nozzle and the inside
of the heating element.
(refer to p.12
Maintenance of the
Desoldering Gun)
Replace the entire filter pipe
with the provided backup filter pipe.
Cleaning during Operation
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.
Observing the indicator
Replacing the filter
Replace the filter as shown
. 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.
Pull
Down
9
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, resulting 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.