YIHUA Hot Air Soldering Station "2 in 1"

Models Series 852 / 862 / 872 / 952 / 902

User Manual

Thank you for choosing this model of hot air soldering station. Please read this manual carefully before using the station and keep it for future reference.

ATTENTION!!!

To avoid electric shock, injury, and fire hazards, follow these basic precautions when using this appliance:

1. After finishing work, set the power switch to "Off" and unplug the power cord from the outlet.
2. For personal safety and to avoid serious adverse consequences, use only approved original or recommended replacement parts and components.
3. If the appliance breaks down, contact a specialized service center or authorized personnel for repair.
4. This appliance has a three-prong plug with grounding. It must be inserted into a three-prong grounded outlet. Do not alter the plug or use ungrounded adapters, as this may result in a lack of grounding.
5. When powered on, the appliance can heat up to 400°C. Do not use the soldering station near explosive gases or flammable materials. The tubes and heating elements of the appliance become hot during operation. To avoid burns, do not touch them and do not allow the appliance to touch body parts.
6. Before turning on the hot air gun, ensure safe operating conditions and do not leave the appliance unattended when switched on.
7. When replacing nozzles or other parts, always turn off the power and wait for the heating element tube and nozzle to cool down to room temperature. Only then can the nozzle be replaced.
8. Do not obstruct the free flow of air into and out of the appliance.
9. After finishing work, place the handle of the appliance in its holder and turn off the appliance.
10. Use the appliance only for soldering or desoldering. Do not strike the soldering iron against the work surface to remove solder residue, as this can cause serious damage to the appliance.
11. Smoke may appear during soldering, so use the appliance in a well-ventilated area.

1. GENERAL DESCRIPTION

Models Series 852/902

1. Utilizes a traditional high-precision thermocouple for temperature measurement. A dual-channel operational amplifier ensures stable operation. High power, rapid heating, and accurate, stable temperature readings unaffected by airflow volume. Capable of lead-free desoldering.
2. The heating element for heating the blown air is made using the latest technologies (frame type) from high-quality materials, significantly increasing stability and reliability, and reducing the risk of damage from impact or drops (traditional technologies use quartz glass, which cannot withstand such use and does not allow use in transport or extreme conditions). This also extends the service life of the soldering station.
3. New technology is also used in the hot air outlet. A diaphragm pump and a turbine (fan in the handle) are convenient ways to supply air. When using large nozzles, the air stream spirals, providing a weak airflow. When using small nozzles, it provides a multi-directional strong airflow. The appropriate type and strength of airflow can be selected depending on the task.
4. The handle of the appliance (in models with a turbine pump) is equipped with a touch switch. When the handle is in the operator's hand during operation, the system automatically activates the working mode. When the handle is placed in the holder, the system enters standby mode, simplifying use and extending the life of the heating element.
5. Using a turbine/diaphragm pump as an air source increases the appliance's service life and ensures low noise levels.
6. The appliance uses a high-quality heating element for rapid heating and long service life. The anti-static function protects the board's electronic components from static or electrical discharge.

Models Series 852D+/862/872/952

1. These models include all features of the 852 series, plus the latest microprocessors with PID software control, precise digital display of hot air gun and soldering iron temperatures, lead-free desoldering capability, higher power ratings than the 852 series, and faster heating unaffected by airflow volume. The system considers current hot air gun and soldering iron temperatures, using milliseconds as the reading speed unit. High thermal compensation speed enhances temperature stability with minimal static error. This compensation speed virtually eliminates the influence of various adverse working conditions.
2. The hot air gun features a latest-generation safety system. Upon powering on, the system automatically detects if the handle is in the holder to prevent accidents from the handle falling. Additionally, various components are equipped with a universal automatic measurement system for protection against high temperatures, short circuits, open circuits, and overloads. These errors are displayed and automatically prevented.
3. Convenient design. The 862 series hot air guns offer manual/automatic modes, allowing selection based on working conditions. For frequent use, the automatic mode can prevent rapid temperature increases. Selecting these modes based on work conditions enhances the efficiency of the soldering station.
4. The 872 series soldering stations are designed for use in various regions and feature temperature display in Celsius and Fahrenheit.
5. Controlled by SAMSUNG microcontrollers, utilizing the latest SMT technologies, providing a clear signal, and improved stability and protection functions.
6. The heating element is manufactured according to various requirements and conditions and can be produced in two versions: a standard version for domestic use and a high-quality white heating element for import. Note: This appliance supports functional expansion. After an update, if functions are inactive, the "---" indicator will flash on the display. Turn off the power or unplug the appliance. Ensure the appliance is powered off.

2. TECHNICAL SPECIFICATIONS

3. COMPARATIVE TABLE OF APPLIANCE FUNCTIONS

4. GENERAL USE

1. Designed for soldering and desoldering of most SMD components, such as SOIC, CHIP, QFP, PLCC, BGA, etc.
2. Can be used for heat shrink tubing, drying, gluing, defrosting, heating, and plastic welding.

5. OPERATING INSTRUCTIONS

Operation of Appliances with Turbine Pump Type

1. Position the soldering station conveniently and place the handle in the holder.
2. Connect the appliance's power cord to the power outlet and install the required nozzle (use the largest possible nozzle diameter).
3. Turn on the appliance (power switch is on the rear panel), then turn on the hot air gun; it will begin to heat up.
4. Set the desired temperature using the thermostat knob. Remove the hot air gun handle from the holder once the station has heated to the set temperature. The appliance is ready for use after the temperature stabilizes. The operating status indicator (on 862 series models, it's in the bottom right corner - digital control unit; on 852 series models - an LED indicator) lights up when the temperature reaches the set value and is stable. The indicator blinks when the temperature is stable, and turns off during temperature fluctuations. Set the required airflow volume; the set temperature helps maintain normal operation. The digital control unit indicator in the bottom right corner of 862 series models will blink when the appliance reaches the set temperature. High thermal compensation speed (the appliance reads temperature every millisecond) ensures high accuracy and temperature stability. (See diagram below) 2500 The program is in high-speed temperature compensation mode.
5. After finishing work with the soldering station, place the handle in the holder. Heating will stop automatically, and the heating element will cool down with airflow. When the temperature drops below 100°C, the display will show "---", indicating the appliance has entered standby mode.

Operation of Appliances with Diaphragm Pump Type

1. Position the soldering appliance conveniently. Remove the safety screw located on its bottom cover; otherwise, the appliance will vibrate and make noise during operation, which may adversely affect performance. Always install the safety screw during transportation to prevent possible damage.
2. Connect the appliance's power cord to the power outlet and install the required nozzle.
3. Turn on the soldering station. Once the station is on and operating normally, the display will show the current temperature. Use the temperature adjustment knob to set the desired temperature and airflow volume. Wait for the temperature reading to stabilize. The appliance is ready for use.
4. After finishing work with the soldering station, place the handle in the holder, turn off the power. Heating will stop, the display will turn off, and the heating element will cool down with airflow (for 2 minutes) until the heating element temperature is below 70°C, after which the station will turn off.
5. If you do not plan to use the appliance for an extended period, disconnect it from the power supply.

Soldering Iron Operation

1. Insert the soldering iron cable into the soldering station connector and place the soldering iron in its holder.
2. Turn on the appliance's power and set the desired temperature using the temperature adjustment knob. The heating indicator will light up, indicating the appliance is heating to the set temperature. The indicator will blink when the temperature stabilizes. The appliance is ready for use.

6. USAGE RULES

1. When powering on the appliance, its handle should be placed in the special holder.
2. Ensure that nothing obstructs the air outlet from the appliance.
3. After finishing work with the appliance, place its handle in the special holder, wait for the heating element to cool to room temperature – the display will show the "---" indicator (air supply stop), then turn off the appliance's power. (For models with a turbine pump)
4. Models with a turbine pump come with three nozzles: large, medium, and small. When using a small nozzle, set the airflow volume to maximum, or set a low temperature, but in that case, it is recommended to operate the appliance for the minimum possible time to avoid damaging its heating element.
5. Select the appropriate hot air gun nozzle size according to the instructions and the type of object. Using an inappropriate nozzle for the object may cause a slight change in the set temperature. Ensure the distance between the nozzle and the object is at least 2mm.
6. At the beginning of soldering iron use, the tip temperature should match the melting point of the solder used. Subsequently, the tip temperature should be adjusted as needed for the object.
7. The soldering iron tip temperature should not be too high; using excessive temperatures reduces work efficiency. When the appliance is not in use, reduce the set temperature.
8. Keep the soldering iron tip clean. Use a special sponge for cleaning. After use, clean the tip and apply a new layer of solder to prevent oxidation.

7. DISPLAY INDICATOR MEANINGS

1. The "---" indicator means the hot air gun temperature has dropped below 100°C; the soldering station is in standby mode, and the handle is in the holder.
2. The "S-E" indicator means there is a problem with the sensor; the heating element needs replacement (heating material and sensor components).

8. NOTES

1. Do not use excessive force when installing/removing nozzles.
2. Replace nozzles only when the appliance is cool (room temperature).
3. A small amount of light smoke from the heating element is normal and dissipates quickly. To avoid burns, do not touch metal parts near the heated tip or direct hot air at people.
4. When replacing the heating element, be careful not to damage the grounding wire (contact)!
5. When replacing the cable, pay close attention to its type and color!
6. When replacing the heating element or coil, use identical heating elements or coils!
7. Appliance testing was conducted according to existing standards, and operational life tests were performed at various temperatures. Slight yellowing of the steel part of the outlet is acceptable.

9. APPLIANCE PART REPLACEMENT

Hot Air Gun Heating Element Replacement

1. Before replacing the heating element, ensure the appliance has completely cooled down.
2. Unscrew the two screws on the appliance handle.
3. Turn the handle counterclockwise until it unscrews, then remove its cover.
4. Carefully remove the compressor, unscrew the three screws securing the board.
5. Turn the board over and disconnect the connecting wire from the heating element, paying attention to the correct connection.
6. Disconnect the heating element, wrapped in mica paper, from the heating part of the heating tube. Be careful not to damage the grounding cable.
7. Wrap the new heating element with mica paper and install it in the tube as the replaced one was installed.
8. Connect the connecting wire.
9. Reassemble the appliance handle in the reverse order of disassembly.

Soldering Iron Tip and Heating Element Coil Replacement

1. Unscrew the nut (1), remove the steel tube (2), and extract the tip.
2. To replace the heating element, remove the fitting (4), carefully pull out the heating coil (6) along with the board (7), paying attention to the correct connection of the grounding spring (5).
3. Unscrew the metal core from the board and replace the heating element. Ensure the metal core is installed correctly.

Diagrams

Diagram of hot air gun handle disassembly (diaphragm pump models)

Diagram of hot air gun handle disassembly (turbine pump models)

Diagram of soldering iron components

SET OF REPLACEMENT NOZZLES

The size in the name and characteristics corresponds to the IC size.