3.

WARNINGS AND CAUTIONS

Disassembling the 900S 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
1. Slide the handle cover (2) toward the cord and When the power is on, the tip temperature is between
remove the screw (1) securing the heating element. 200°C/392°F and 480°C/ 896°F.
2. Turn the nut (3) counterclockwise and remove it. Since mishandling may lead to burns or fire, be sure to comply with
3. Remove the tip (4). the following precautions.
4. Pull both the heating element (5) and the cord toward
the tip of the iron and out of the handle (6). z Do not touch the metallic parts near the Tip.
z Do not use the product near flammable items.
Measure the resistance values at the sensor and the z Advise other people in the work area that the unit can reach a very high
heating element of the terminal board. temperature and should be considered potentially dangerous.
The resistance value should be the same as for the 907, z Turn the power off while taking breaks and when finished using the unit.
908. z Before replacing parts or storing the unit, turn the power off and allow the unit
To replace the heating element, refer to the instructions to cool to room temperature.
included with the replacement part.

To prevent damage to the unit and ensure a safe working

2. Broken Soldering Iron 1. Turn the unit ON and set the temperature control knob environment, be sure to comply with the following precautions.
to 480°C (896°F). Then wiggle and kink the iron cord
Cord z Do not use the unit for applications other than soldering.
at various locations along its length, including in the
There are two methods of testing z Do not rap the soldering iron against the work bench to shake off residual
strain relief area. If the LED heater lamp flickers, then
the soldering iron cord. solder, or otherwise subject the iron to severe shocks.
the cord needs to be replaced.
z Do not modify the unit.
z Use only genuine HAKKO replacement parts.
z Do not wet the unit or use the unit when your hands are wet.
z The soldering process will produce smoke, so make sure the area is well
ventilated.
2. Check the resistance between the pin of the plug and z While using the unit, don’t do anything which may cause bodily harm or
CAUTION
the wire on the terminal. physical damage.
The LED heater lamp will flicker even
with a normal Iron cord if the Pin 1: Red Pin 2: Blue Pin 3: Green Pin 4: White
temperature reaches 480°C (896°F). Pin 5: Black
The value should be 0 Ω. If it is greater than 0 Ω or is
∞, the cord should be replaced.

3. Replacing the Fuse Refer to the drawing in the replacement parts section of
this manual. Desolder the blown fuse and remove it.
Solder on a new one.
9 2
 4. PART NAMES 11. CHECKING FOR BREAKAGE OF THE HEATING ELEMENT AND CORD ASSEMBLY
Disconnect the plug and measure a Between pins 4&5 (Heating Element) 2.5 - 3.5 Ω (Normal)
b Between pins 1&2 (Sensor) 43 - 58 Ω (Normal)
the resistance value between the c Between pin 3&Tip <2Ω
Iron receptacle
connecting plug pins as follows.
Large cleaning
sponge
If the values of “a” and “b” are
outside the above value, replace the
LED heater lamp heating element (sensor) and/or
Temp. control knob cord assembly. Refer to Procedures
Knob mount 1 and 2.
Small cleaning
sponge If the value of “c” is over the above
value, remove the oxidization film by
Iron holder base lightly rubbing with sand-paper or
steel wool the points shown below.

Cord assembly 1. Broken Heating Element Disassembling the 907/908

CAL pot plug/calibrator
Power switch

Hex wrench

5. SETTING UP & OPERATING THE HAKKO 936

CAUTION : The sponge is compressed. It will swell when moistened with water.
Before using the unit, dampen the sponge with the water and squeeze it dry.
Failure to do so may result in damage to the soldering tip.

A. Iron holder
1. Small cleaning sponge Heating Element (Red) Sensor (Blue)
Dampen the small cleaning sponge
with water and then squeeze it dry. Measure when the heating element is at room temperature.
Place it in one of the 4 openings 1. Resistance value of heating element (RED) 2.5 - 3.5 Ω
of the iron holder base. 2. Resistance value of sensor (BLUE) 43- 58 Ω
2. Add water to approximately the 1. Turn the nut (1) counterclockwise If the resistance value is not normal, replace the heating
level as shown. The small sponge and remove the tip enclosure (2), element.
will absorb water to keep the larger the tip (3). (Refer to the instructions included with the replacement part.)
sponge above it wet at all times. 2. Turn the nipple (4)
*The large sponge may be used alone counterclockwise and remove it After replacing the eating Element,
(w/o small sponge & water). from the iron. 1. Measure the resistance value between 1) pins 4 and 1
3. Dampen the large cleaning sponge 3. Pull both the heating element (6) or 2; 2) pins 5 and 1 or 2. If it is not ∞, the heating
and place it on the iron holder base. and the cord assembly (11) out element and sensor are touching. This will damage
Note: The iron receptacles for the 900 of the handle (12). (Toward the tip the P.W.B.
(S) and the 907/908 soldering of the iron). 2. Measure the resistance value “a”, “b”, and “c” to
irons are different. Be sure to use
4. Pull the grounding spring (5) out confirm that the leads are not twisted and that the
the proper one for each type of
soldering iron. (Refer to Parts List). of the sleeve. grounding spring is properly connected.
3 8
 10. TROUBLESHOOTING GUIDE
WARNING : * Disconnect the power plug before servicing. CAUTION : Be sure to turn off the power switch before connecting or disconnecting the
Failure to do so may result in electric shock. soldering iron. Failure to do so may damage the P.W.B.
* If the power cord is damaged, it must be replaced by the manufacturer, its
service agent or similarity qualified person in order to avoid personal injury or B. Connections
damage to the unit. Receptacle
1. Connect the cord assembly to
the receptacle. Align the grooves Turn clockwise
Problem 1. Check 1. Is the power cord and/or connecting plug 2. Place the soldering iron in the and pins. And firmly.
The heater lamp does not light up. disconnected? iron holder. push straight in.
• Connect it. 3. Plug the power cord into the
Check 2. Is the fuse blown? power supply. Be sure to ground
• Determine why the fuse blew and eliminate the cause, the unit.
then replace the fuse.
a. Is the inside of the iron short-circuited?
b. Is the grounding spring touching the heating element?
c. Is the heating element lead twisted and short-circuited?

Problem 2. Check 3. Is the soldering iron cord broken?

C. Set the temperature
1. Set the temperature control knob
The heater lamp lights up but the • Refer to “Checking for breakage in the cord assembly.”
to the desired temperature.
tip does not heat up. Check 4. Is the Heating Element broken?
2. Lock the knob.
• Refer to “Checking for breakage in the heating
The HAKKO 936 station is
element.”
equipped with a temperature
control knob lock. After setting
Problem 3. ¨ Check 3 the desired temperature, tighten
The tip heats up intermittently. the hex nut on the underside of
the knob mount using the
supplied hex wrench. Turn the nut
Problem 4. Check 5. Is the tip temperature too high? clockwise to tighten the knob
The tip is not wet. • Set an appropriate temperature. lock.
Check 6. Is the tip clean?
• Refer to “Tip Care and Use” CAUTION : • Don’t overtighten the knob lock.
• Don’t attempt to turn the knob when the knob lock is on.

Problem 5. Check 7. Is the tip coated with oxide?

The tip temperature is too low. • Refer to “Inspect and clean the tip” D. Turn on the power switch.
Check 8. Is the iron calibrated correctly? The heater lamp blinks on and off
• Recalibrate. when the tip temperature
reaches the set temperature. The
unit is now ready to perform
Problem 6. Check 9. Is the tip seized? soldering work.
The tip can not be pulled off. Is the tip swollen because of deterioration?
• Replace the tip and the heating element. For greater convenience, and
soldering efficiency, two stations
can be securely stacked as
Problem 7. ¨ Check 8
shown.
The tip doesn’t hold the desired
temperature.
CAUTION : The soldering iron must be placed in the iron holder when not in use.
7 4
 10. TROUBLESHOOTING GUIDE
WARNING : * Disconnect the power plug before servicing. CAUTION : Be sure to turn off the power switch before connecting or disconnecting the
Failure to do so may result in electric shock. soldering iron. Failure to do so may damage the P.W.B.
* If the power cord is damaged, it must be replaced by the manufacturer, its
service agent or similarity qualified person in order to avoid personal injury or B. Connections
damage to the unit. Receptacle
1. Connect the cord assembly to
the receptacle. Align the grooves Turn clockwise
Problem 1. Check 1. Is the power cord and/or connecting plug 2. Place the soldering iron in the and pins. And firmly.
The heater lamp does not light up. disconnected? iron holder. push straight in.
• Connect it. 3. Plug the power cord into the
Check 2. Is the fuse blown? power supply. Be sure to ground
• Determine why the fuse blew and eliminate the cause, the unit.
then replace the fuse.
a. Is the inside of the iron short-circuited?
b. Is the grounding spring touching the heating element?
c. Is the heating element lead twisted and short-circuited?

Problem 2. Check 3. Is the soldering iron cord broken?

C. Set the temperature
1. Set the temperature control knob
The heater lamp lights up but the • Refer to “Checking for breakage in the cord assembly.”
to the desired temperature.
tip does not heat up. Check 4. Is the Heating Element broken?
2. Lock the knob.
• Refer to “Checking for breakage in the heating
The HAKKO 936 station is
element.”
equipped with a temperature
control knob lock. After setting
Problem 3. ¨ Check 3 the desired temperature, tighten
The tip heats up intermittently. the hex nut on the underside of
the knob mount using the
supplied hex wrench. Turn the nut
Problem 4. Check 5. Is the tip temperature too high? clockwise to tighten the knob
The tip is not wet. • Set an appropriate temperature. lock.
Check 6. Is the tip clean?
• Refer to “Tip Care and Use” CAUTION : • Don’t overtighten the knob lock.
• Don’t attempt to turn the knob when the knob lock is on.

Problem 5. Check 7. Is the tip coated with oxide?

The tip temperature is too low. • Refer to “Inspect and clean the tip” D. Turn on the power switch.
Check 8. Is the iron calibrated correctly? The heater lamp blinks on and off
• Recalibrate. when the tip temperature
reaches the set temperature. The
unit is now ready to perform
Problem 6. Check 9. Is the tip seized? soldering work.
The tip can not be pulled off. Is the tip swollen because of deterioration?
• Replace the tip and the heating element. For greater convenience, and
soldering efficiency, two stations
can be securely stacked as
Problem 7. ¨ Check 8
shown.
The tip doesn’t hold the desired
temperature.
CAUTION : The soldering iron must be placed in the iron holder when not in use.
7 4
 4. PART NAMES 11. CHECKING FOR BREAKAGE OF THE HEATING ELEMENT AND CORD ASSEMBLY
Disconnect the plug and measure a Between pins 4&5 (Heating Element) 2.5 - 3.5 Ω (Normal)
b Between pins 1&2 (Sensor) 43 - 58 Ω (Normal)
the resistance value between the c Between pin 3&Tip <2Ω
Iron receptacle
connecting plug pins as follows.
Large cleaning
sponge
If the values of “a” and “b” are
outside the above value, replace the
LED heater lamp heating element (sensor) and/or
Temp. control knob cord assembly. Refer to Procedures
Knob mount 1 and 2.
Small cleaning
sponge If the value of “c” is over the above
value, remove the oxidization film by
Iron holder base lightly rubbing with sand-paper or
steel wool the points shown below.

Cord assembly 1. Broken Heating Element Disassembling the 907/908

CAL pot plug/calibrator
Power switch

Hex wrench

5. SETTING UP & OPERATING THE HAKKO 936

CAUTION : The sponge is compressed. It will swell when moistened with water.
Before using the unit, dampen the sponge with the water and squeeze it dry.
Failure to do so may result in damage to the soldering tip.

A. Iron holder
1. Small cleaning sponge Heating Element (Red) Sensor (Blue)
Dampen the small cleaning sponge
with water and then squeeze it dry. Measure when the heating element is at room temperature.
Place it in one of the 4 openings 1. Resistance value of heating element (RED) 2.5 - 3.5 Ω
of the iron holder base. 2. Resistance value of sensor (BLUE) 43- 58 Ω
2. Add water to approximately the 1. Turn the nut (1) counterclockwise If the resistance value is not normal, replace the heating
level as shown. The small sponge and remove the tip enclosure (2), element.
will absorb water to keep the larger the tip (3). (Refer to the instructions included with the replacement part.)
sponge above it wet at all times. 2. Turn the nipple (4)
*The large sponge may be used alone counterclockwise and remove it After replacing the eating Element,
(w/o small sponge & water). from the iron. 1. Measure the resistance value between 1) pins 4 and 1
3. Dampen the large cleaning sponge 3. Pull both the heating element (6) or 2; 2) pins 5 and 1 or 2. If it is not ∞, the heating
and place it on the iron holder base. and the cord assembly (11) out element and sensor are touching. This will damage
Note: The iron receptacles for the 900 of the handle (12). (Toward the tip the P.W.B.
(S) and the 907/908 soldering of the iron). 2. Measure the resistance value “a”, “b”, and “c” to
irons are different. Be sure to use
4. Pull the grounding spring (5) out confirm that the leads are not twisted and that the
the proper one for each type of
soldering iron. (Refer to Parts List). of the sleeve. grounding spring is properly connected.
3 8
 3. WARNINGS AND CAUTIONS
Disassembling the 900S 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
1. Slide the handle cover (2) toward the cord and When the power is on, the tip temperature is between
remove the screw (1) securing the heating element. 200°C/392°F and 480°C/ 896°F.
2. Turn the nut (3) counterclockwise and remove it. Since mishandling may lead to burns or fire, be sure to comply with
3. Remove the tip (4). the following precautions.
4. Pull both the heating element (5) and the cord toward
the tip of the iron and out of the handle (6). z Do not touch the metallic parts near the Tip.
z Do not use the product near flammable items.
Measure the resistance values at the sensor and the z Advise other people in the work area that the unit can reach a very high
heating element of the terminal board. temperature and should be considered potentially dangerous.
The resistance value should be the same as for the 907, z Turn the power off while taking breaks and when finished using the unit.
908. z Before replacing parts or storing the unit, turn the power off and allow the unit
To replace the heating element, refer to the instructions to cool to room temperature.
included with the replacement part.

To prevent damage to the unit and ensure a safe working

2. Broken Soldering Iron 1. Turn the unit ON and set the temperature control knob environment, be sure to comply with the following precautions.
to 480°C (896°F). Then wiggle and kink the iron cord
Cord z Do not use the unit for applications other than soldering.
at various locations along its length, including in the
There are two methods of testing z Do not rap the soldering iron against the work bench to shake off residual
strain relief area. If the LED heater lamp flickers, then
the soldering iron cord. solder, or otherwise subject the iron to severe shocks.
the cord needs to be replaced.
z Do not modify the unit.
z Use only genuine HAKKO replacement parts.
z Do not wet the unit or use the unit when your hands are wet.
z The soldering process will produce smoke, so make sure the area is well
ventilated.
2. Check the resistance between the pin of the plug and z While using the unit, don’t do anything which may cause bodily harm or
CAUTION
the wire on the terminal. physical damage.
The LED heater lamp will flicker even
with a normal Iron cord if the Pin 1: Red Pin 2: Blue Pin 3: Green Pin 4: White
temperature reaches 480°C (896°F). Pin 5: Black
The value should be 0 Ω. If it is greater than 0 Ω or is
∞, the cord should be replaced.

3. Replacing the Fuse Refer to the drawing in the replacement parts section of
this manual. Desolder the blown fuse and remove it.
Solder on a new one.
9 2