Xytronic lf-852d User manual

OPERATING MANUAL
FOR
LF-852D
HOT-AIR
S.M.D. REWORK STATION
Thank you for choosing XYTRONIC LF-852D S.M.D. Rework Station. This tool is
specially designed for soldering, desoldering Surface Mount Devices with temperature
controlled hot air. When used in conjunction with our 628 Preheat system, the 852D
will achieve marked improvements in quality and efficiency of your rework tasks.
Please read the operating manual carefully to maximize the advantages of using your
new LF-852D Hot Air rework station and keep this manual readily accessible for future
reference.

INTRODUCTION
This appliance is not intended for use by children or other persons without assistance
or supervision if their physical, sensory or mental capabilities prevent them from using
it safely. Children should be supervised to ensure that they do not play with appliance.
Failure to observe the safety regulation will result in a risk of life and limb. The
manufacturer shall not be liable for damage resulting from misuse of the unit or
unauthorized alterations.
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:【WARNING 】 and 【CAUTION】 :【ELECTRICAL SHCOK 】
Warning and Caution are positioned at critical points in the manual to
draw the user’s attention to significant safety concerns. Be sure to comply
with the following warnings and cautions for your safety.
1. Ensure the voltage rating of the unit and your power supply are identical prior to
use.
2. Check carefully of any damage during transportation.
3. Put the product on a safe and stable working table. Table surface should be consisted
of fire and heat resistant material due to the unit can reach very high temperature and
potentially dangerous.
4. During the operation, the heater is extremely hot, and will cause serious burns if
contacted exposed skin. Use gloves and/or any heat resistant tools to pick up the
PCB assembly to eliminate the possibility of burns.
5. Do not use the product near combustible gases or flammable materials.
6. Turn the power switch OFF and allow the heater to cool before checking or
replacing heater and other parts, or prior to storing the unit.
7. Keep the appliance clean. This may be used with a damp cloth using small amount
of liquid detergent. Never submerse the unit in liquid or allow any liquid to enter the
station. Never use any solvent to clean the case.
8. This unit is designed for SMD rework and should not be used for any other purpose
without first consulting the manufacturer or its authorized agent.
9. Keep the unit out of the reach of children. Young children should be supervised to
ensure that they do not play with the appliance.
To prevent electrical shock, be sure to take the following precautions:
1. Make sure the unit is grounded. Always connect power to a grounded receptacle.

2. Do not pressure the AC power cord. Be sure the work area is well ventilated.
3. Do not bump, hit, pour water/liquids or otherwise subject the heating surface to
physical shock. This may damage the heater.
4. To isolate the equipment from the mains before commencing repairs or making any
maintenance to avoid electric shock. This may result in Death or serious injury.
5. Do not expose the unit to moisture nor use the unit with wet hands.
6. Turn the power switch off and remove the AC power cord by pulling the plug (not
the cable) when the unit will remain unused for a longer period of time.
7. Do not modify the unit.
Warning
●To last the life of the heating element, not recommend continuously using at
low air flow and high temperature. Let the heating element be cooler after using
a maximum 20 minutes. Ensure that it is placed back on its cooling stand to cool
down between rework operations. Also, do not switch the hand tool on while it is in
the cooling stand. Fail to comply with the instructions may result in damage to
the hand tool.
●Do not aim the hot air at your eyes. Do not allow the hot air from the hand tool to
aim the eyes as serious eye damage may occur.
●The hot air pencil can produce a lot of heat. Do not allow the heater and the
nozzle to contact exposed skin as burning may occur. To eliminate the possibility
of burns, allow time for the equipment to cool before commencing maintenance.
●Death or serious injury may result from electric shock. It is therefore essential
to isolate the equipment from the mains before commencing repairs.
●Keep the hot air away from the body, clothes and flammable material when in
operation. The nozzle metal is in a high temperature status, do not touch the
nozzle! Always replace the hand tool to its original holder when not being use. The
nozzle and the heating element are still remaining hot after being switched off.
Ensure that you do not touch them.
●Do not block the air outlet in full area of the nozzle, or it may cause the heat
reflection and damage the heating element.
● Do not leave when the machine is on operating: Stare at the nozzle when the
rework station is on operating, so as not to burn your body or other objects. Turn
off the machine and unplug the power cord when you are leaving and put the hot
air handle to the holder in one side of the machine. The nozzle is still remaining hot
after being switch off on some time. Ensure that you do not touch the nozzle.
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● Do not use if damaged: If the pump doesn’t work or the rework station becomes
faulty, discontinue using immediately. To comply with safety standards, the pump
or other part must only be replaced by authorized technicians as special purpose
tools are required. Only the technician is permitted undertake repairs. Use the
original replacement part only.
●Remember unplug in the power cord: The station must be switched off and the
power cord must be unplug-in before replacing the fuse in AC socket in rear side of
the machine.
PRODUCT FEATURES
◆With specially intelligent chip microcomputer control design, double LED display
operate by pressing keys, make it convenient and comfortable operation.
◆Temperature and air blow by digital display readout, easy to read.
◆With the high power heating element, heat up quickly, the momentary power can
reach 550W.
◆Temperature adjustable, suits for removing QFP, SOP, PLCC or SOJ chips etc.,
especially the built in static free circuit design is safety for the sensitive elements
like CMOS ICs.
◆ Auto-cooling design: When the power switch off, the cooling system will begin to
work automatically, the temperature falls down to 75℃(167℉) to protect the
heating element from burning ..
◆Heating element auto-protecting function: When heating element reaching a high
temperature which can be protected automatically, to lasting the life of heating
element.
PRODUCT DESCRIPTION
The temperature controlled Hot-Air LF-852D SMD rework station built in an
intelligent microcomputer chip which is specially designed for the present lead free
SMD chips such as SOIC, CHIP, QFP, PLCC, BGA etc reworks to meet RoHS
requirement. This appliance equipped with a high power heating element and gets very
fast heat up time. A high-quality sensor and heat transfer technology ensure precise
temperature regulation is essential for making consistent, reliable. The aluminum
housing has the advantages of strong structure, good heat sink and effectively resistant
of electro-magnetic interference.

Model LF-852D REWORK STATION
Power Voltage 100-120Vac 60Hz 220-240Vac 50Hz
Power Consumption (Max) 600W
Pump Diaphragm 115Vor120V 230V or 240V
Air Flow 1.5L-40L /Min
Temperature range 212℉-896℉ 100℃-480℃
Dimensions 283(W)*120(H)*190(D) mm
Fuse (Fast type) 5A
SPECIFICATIONS
BRIEF INTRODUCTION OF PANEL FUNCTIONS:
Front panel
○
1Main power switch
○
2 Hot air pencil inlet
○
3 “▲”: Temperature increasing (UP)
○
4 “▼”: Temperature decreasing(Down)
○
5 Temp Display
○
6 “SET”: Temperature setting display
○
7 “▲”: Hot air blow (UP)
○
8 Air blow display
○
9 “▼”: Hot air blow (DOWN)
OPERATING PRECAUTIONS
1. Make sure both heater and nozzle are cool before attaching the nozzle.
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2. Caution High Temperature Operation
Do not use the LF- 852D near ignitable gases, or other inflammable materials. Both
nozzle and hot air are extremely hot and can cause burns. Never touch the nozzle
and heater assembly or allow the hot air to blow against your skin. Initially, the iron
may emit white smoke, but this will soon dissipate.
3. Be sure to cool the unit after using. While the power switch off, the unit will
automatically blow cooling air through the pipe for a short period of time. Do not
disconnect the plug during this cooling process.
4. Do not disassemble the pump.
If the pump or other critical internal components become faulty, discontinue its use
immediately. Please return to your vendor or its authorized repairers for proper servicing.
5. Disconnect the plug while the unit is not in use.
When the power cord is connected into the power supply, the unit has a little flow of
electricity; even the Power Switch is in off position. So when you don’t use the unit
for a longer period of time, disconnect the plug.
Operation Setup
1. Select the Nozzle that matches the size of the IC. Attach the nozzle when both the
heating element and the nozzle are cool and the unit is turned off and unplugged.
2. Loosen the screw on the nozzle. Attach nozzle.
IMPORTANT: Do not force the nozzle or pull on the edge of the nozzle with pliers.
Also, do not tighten the set-screw too tightly.
Suitable for desoldering of SMD components such as SOIC, CHIP, QFP, PLCC,
BGA etc.
OPERATING INSTRUCTIONS
Caution: Check carefully for any damage during transportation and ensure that the
working voltage matches your power supply before plugging in the station.
1. Ensure that the base unit power switch is in the “OFF” position.
2. Plug in AC power cord and turn “Mains power switch” to “ON” position then the
temperature LED and wind LED display will be ON and show the value.
3. Press “▲” or“▼”key on the left side of the front panel to choose the desired
temperature. When the temperature reaches to the desired temperature that the
heating indicator light will be flashed on and off to maintain the set temperature .The
temperature will change 1 degree by pressing the keys “▲” or“▼” at a time.

4. Press “▲”or “▼” key to choose the desired air flow on the right side of the front
panel. The speed will change 5 degrees by pressing the keys “▲” or“▼” at a time.
5. After adjusting the air flow and temperature and wait for the temperature to stabilize
for a short period of time.
QFP De-soldering
1. Melt the solder: Hold the iron so that the nozzle is located directly over, but not
touching the IC and allow the hot air to melt the solder. Be careful not to touch the
leads of the IC with the nozzle.
2. Remove the IC: Once the solder has melted, remove the IC by lifting the pliers.
3. Turn the power switch off: After the power switch is off, an automatic blowing
function begins sending cool air through the pipe in order to cool both the heating
element and the handle. So do not disconnect the plug during this cooling process.
4. In case you don’t use the unit for a long time, disconnect the plug.
Note: After the power switch off about one minute later, the temperature will fall
down to 75℃(167℉) and power automatically shut off.
5. Remove any remaining solder: After removing the IC, cleaning the remaining
solder chips with a wick or desoldering tool.
Note: For SOP, PLCC etc. would recommend by using tweezers iron to desolder.
QFP Soldering
1. Apply the solder paste: Apply the proper quantity of solder paste and flux
(preferably no-clean) and place install the SMD on the PCB.
2. Preheat SMD.
3. Soldering: Heat the lead frame evenly.
4. Washing: When soldering is completed, wash the area with a defluxer.
Note: While there are many advantages of hot air SMD rework, it is also possible
to have defects for soldering BGA. Will recommend to inspect all soldering joints
closely.
REPLACE THE HEATING ELEMENT
Caution:
Before replacing the heating element ,be sure to or cool the unit and unplug the
power cord plug.
Replacing the Heating Element
1. Remove the screws, slide the tube
Remove the 3 screws, which secure the handle and slide the cord tubing.
2. Open the Handle.
Disconnect the ground wire sleeve and remove the outer tube assembly.
Inside the tube a quartz glass/heat insulation layer is installed. Do not
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drop or damage it.
3. Remove the Heating Element.
Disconnect the terminals and remove the heating element.
4. Insert a new Heating Element.
Handle the new heating element with care and do not touch the wire leads. Insert a
new heating element and reconnect the terminals. Reconnect the ground wire after
replacing the element. Assemble the handle in the reverse order of disassembly. .
ACCESSORY
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