HAKKO 472B Desoldering Tool Wand Tested and Working Instruction Manual

HAKKO 472B Desoldering Tool Wand Tested and Working

Packing List

Please make sure that all the items listed below are included in the Hakko 472B/473 package.

Safety Instructions

WARNING: Warnings and cautions are placed at critical points in this manual to direct the operator’s attention to significant items. They are defined as follows:
WARNING: Failure to comply with a WARNING may result in serious injury or death.
CAUTION: Failure to comply with a CAUTION may result in injury to the operator or damage to the items involved. For your safety, be sure to comply with these precautions.

CAUTION Remove the pump securing screw M4 x 25 marked red) from the bottom of the station. Failure to do so may result in serious problems.

When the power is ON, the nozzle temperature is between 380°C and 480°C (716°F and 896°F). Since mishandling may lead to burns or fire, be sure to comply with the following precautions.

• Do not touch the metal parts near the nozzle, nearby plastic parts and the spring iron holder.
• Do not use the product near flammable items.
• Advise those in the work area that the unit can reach very high temperatures and should be considered potentially dangerous.
• Turn the power OFF when no longer using the Hakko 472B or when leaving it unattended.
• Before replacing parts or storing the unit, allow the unit to cool and then turn the power OFF.

To prevent accidents and failures, be sure to take the following precautions:

• Do not use the unit for applications other than desoldering.
• Do not rap the desoldering gun against the workbench 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 with wet hands.
• Set the ceramic paper filter (S) for the filter retainer (station), and the ceramic paper filter (L) for the filter pipe (iron).
• Maintain the desoldering iron and the station.
• While using the unit, don’t do anything which may cause bodily harm or physical damage.
• (Hakko 473) Use clean, filtered air. With the button pressed and air flowing, adiust the pressure to between 71 and 100 psi. (5.0 and 7.0 kg/cm?).

Specifications

Part Names

Preparation

CAUTION: Remove the pump securing screw (M4x25, marked red) from the bottom of the unit before using the unit. Failure to do so may result in serious damage to the unit

Before proceeding, confirm that the power switch is turned to “OFF”.

Assemble the Iron Holder

• a) Dampen the capillary sponge (small round sponge) with water and squeeze it dry. Place it in any one of the four round openings in the iron holder base.
• b) Fill the base with water to the level shown in the illustration at right.
• c) Place the cleaning sponge on the base.
• d) Insert the cleaning pin holder into the base. (See illustration at right)
  CAUTION: Use only a dampened and wrung cleaning sponge to clean the nozzle. Using a dry sponge will reduce the life of the nozzle.
  Notes:

1. The sponges are compressed. They will swell when moistened with water.
2. The capillary sponge will absorb water from the reservoir and, by capillary action, transfer water to the cleaning sponge, thus keeping the cleaning sponge moist at all times.
3. The cleaning sponge may be used by itself by dampening it, squeezing it dry, and placing it on the iron holder base. It is not necessary to use the capillary sponge or add water to the reservoir.

Assemble the Desoldering Iron

• a) Insert the filter pipe (w/filter holder/spring filter/ceramic paper filter (L)) into the housing.
• b) Push and turn clockwise the back holder.

Connect the Desoldering Iron to the Station

• a) Insert the 6-pin connecting plug into the receptacle on the station. Lock the plug by turning the plug’s outer ring clockwise.
• b) Place the desoldering iron in the iron holder.
• c) Connect the hose to the vacuum outlet cap.

Plug the Station into a Power Source

• a) Plug the power cord into a grounded AC outlet.
• b) Tum the power switch to “ON”.

After turning on the power, wait three (3) minutes before beginning desoldering operations.

Connect the Compressor (473)

1. Use filtered air to clean away any dust, oil and moisture.

2. With the button pressed and air flowing, adjust the regulator air pressure to 71 psi (5.0kgf/cm?).
   Caution:

   • The absorption power of the unit will be reduced if an adjustment is made while air is not flowing or if the tube is not measured as specified.
   • Do not set the regulator to pressures of 128 psi (9kgt/cm) or higher while the button is not pressed, as such pressures can damage various parts of the station.

Set the Temperature
The temperature can be adjusted to between 662°F and 842ºF with the temperature control knob. This unit has excellent thermal recovery, permitting it to operate at lower temperatures than conventional desoldering tools.

• The temperature can be more precisely set using a soldering iron thermometer. Adjust the temperature control knob until the measured temperature at the nozzle is the desired temperature.
• The temperature control knob can be secured by tightening the temperature control knob securing screw (“+” screw at the top of the unit).

Desoldering

1. Apply the nozzle to the soldered lead and melt the solder.
2. Confirm that the solder is melted by placing the nozzle against the lead and carefully applying slight pressure to the lead. If the lead moves, the solder is melted. Never move the lead by force. If the lead does not move easily, the solder is not fully melted.
3. Extract the solder by pressing the button on the iron.
4. If solder remains, resell the component.

Replacing Parts

Replacing the Nozzle

1. Remove the nut using the supplied spanner.
2. Disassemble the heating parts.
3. Replace the nozzle.

Replacing the Filters

1. Turn the back holder knob counterclockwise and pull out the filter pipe.
2. If there is solder in two-thirds of the spring filter, replace the filter.
3. If the ceramic paper filter is stiff with flux and solder, replace the filter.
4. Insert the spring filter into the filter pipe.
5. Insert the ceramic paper filter into the filter pipe.
6. Insert the back holder into the filter pipe.
7. Insert the filter pipe into the main body and secure it by turning the back holder knob clockwise.

Replacing the Heating Element
The nominal resistance values of a working heating element are 9.252 between pins 1 and 3 (heating element), and 5452 between pins 2 and 4 (sensor) at 23°C (73°F)-Fig. 4.
The heating element should be replaced it:

• The heater or sensor resistance is zero.
• The heater or sensor resistance is infinite.

If the heater resistance is less than 45, or greater than 65, or the sensor resistance is less than 8, or greater than 11. check the wiring in the desoldering iron.

1. Unplug the power cord.
2. Disassemble the heating parts.
3. Turn the back holder knob counter-clockwise and pull out the filter pipe.
4. Remove the housing fastener (8). Fig. 1.
5. Remove the screws securing the housing (10) and the flange (3), (4). Fig. 2.
6. Remove the front holder (11). Fig. 2
7. Remove the screws (5), (6), (7) securing the heating element to the flange, and the screws (1), (2).
8. Desolder the heating element and sensor leads.
9. Secure a new heating element (24V-60W) to the flange with screws (5), (6), and (7). Install the heater in such a way that the lead wires are oriented as in Fig. 3
10. Install the front holder.
11. Resolder the heating element and sensor leads.
12. Reassemble the unit.
13. Recalibrate the temperature.

The resistance value of new heating elements varies, resulting in variations in operating temperature. It is necessary to recalibrate the temperature every time the heating element is replaced.

1. Set the temperature control knob to ” and allow the iron to warm up for three (3) minutes.
2. Adjust the temperature calibrator (“CAL”) until the nozzle temperature (measured with a tip thermometer) is 350°C (662°F).

Maintenance

Properly maintained, the Hakko 472B/473 desoldering tool will provide years of good service. During many of the maintenance procedures, the desoldering iron will be extremely hot. Please wear gloves and work carefully.

Clean the Nozzle with the Nozzle Cleaning Pin

1. Turn the power switch to “ON” and let the (nozzle, and heating element) heat up until the solder is melted.
2. Clean the hole of the nozzle with the nozzle cleaning pin.

Clean the Nozzle with the Nozzle Cleaning Drill

1. Turn the power switch to “ON” and let the (nozzle, and heating element) heat up until the solder is melted.
2. Turning the drill bit clockwise, insert it into the nozzle.
3. Without turning the drill bit, pull it straight out from the nozzle.

Clean the Hole in the Heating Element

1. Disassemble the heating element.
2. Turn the power switch to “ON” and let the (nozzle, and heating element) heat up until the solder is melted.
3. Scrape away all accumulated oxidation from the hole in the heating element until the cleaning pin passes cleanly through the hole.

Cleaning the inside of the Filter Case

1. Remove the Ceramic Paper Filter and inspect it. If it is stiff with flux, replace it.
2. Apply silicone grease to the O-ring of the vacuum outlet retainer (472B/473) and the packing of the filter retainer (472B). Securely tighten the vacuum outlet cap to prevent air leakage.

Clean the pump (472B)

1. Unplug the power cord.
2. Remove the rear panel and the cover.
3. Remove the pump head from each side of the pump.
4. Remove the valve plate and the fixing plate. If the fixing plate is difficult to remove, warm it with hot air. Never use excessive force to remove the plate as it is easily bent.
5. Using only isopropyl alcohol or denatured alcohol, remove any flux adhering to the plates.
6. If the exhaust filter is dirty, replace it.

Disassemble the Ejector (473)

1. Remove the exhaust filter covering the ejector. If the filter is dirty, replace it.
2. Remove the ejector cover and inspect the noise filter (No. B1269). If the filter is dirty, replace it.
3. Remove the exhaust pipe and spacer inside the ejector. Pinch the tip of the exhaust pipe and pull firmly. Both the spacer and the exhaust pipe will come out together.

Clean the inside (473)

1. Clean the inside of the main body of the ejector, the tip of the nozzle and the surrounding area. Remove any dirt with a cotton swab soaked in alcohol.
   Caution: Do not use thinner as a cleaning agent.

2. Soak the exhaust pipe in alcohol and clean the inside of the pipe with a pipe cleaner or a brass brush.

Reassemble the Ejector (473)
Follow the disassembly steps (above) in reverse order.

Troubleshooting Guide

• The power lamp does not light up
  • Is the power cord plugged in correctly?
  • Is the fuse blown?
• The pump does not operate
  • Is the cord assembly properly connected?
  • Is the nozzle or hole in the heating element clogged?
• Solder is not being extracted
  • Is the spring filter full of solder?
  • Is the ceramic paper filter hardened?
  • Is there a vacuum leak?
• The nozzle does not heat up
  • Is the desoldering iron cord assembly properly connected?

PART LIST

Replacement Parts

Wiring Diagram

HEAD OFFICE
4-5. SHIOKUSA 2-CHOME, NANIWA-KU, OSAKA. 556-0024 JAPAN
TEL: +81-6-6561-3225
FAX: +81-6-6561-8466
AMERICAN HAKKO PRODUCTS, INC.
25072 ANZA DR. SANTA CLARITA, CA 91355, U.S.A.
TEL: 661-294-0090
FAX: 661-294-0096
Toll Free (800)88-HAKKO www.hakkousa.com

References

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