Velleman VTSSD5 Manual Del Usuario página 7

7. How to Solder
7.1 Precautions
To extend the life of the heating element in the hot air gun, do not use the device
continuously at a low airflow and a high temperature. Allow the heating element to cool
after maximum 20 minutes of usage. Place the hot air gun back in its stand when not in
use.
Make sure that both heater and nozzle are cold before attaching the nozzle.
High temperatures! Both nozzle and airflow are extremely hot and can cause severe
burns. Never touch the nozzle and heater assembly or allow the hot air to blow against
your skin. When used for the first time, the hot air gun may emit some white smoke,
but this will soon dissipate.
Always let the unit cool down after use. After switching off, leave the power cord
plugged in for a few minutes. When you switch off the unit, the automatic cooling
function blows cooling air through the heater pipe for a short period. This protects the
heater from damage and extends its lifetime. Do not disconnect the mains plug during
this cooling process.
7.2 Setup
Do not force the nozzle or pull its edges with pliers. Do not over-tighten the screw.
1. Switch off the device. Wait until the automatic cooling process has stopped, and
then disconnect the power cord. Wait until both heater and nozzle are completely
cold.
2. Select the nozzle that matches the IC size.
3. Loosen the screw on the nozzle, slide the nozzle on the heater pipe, and fix it with
the screw.
4. Plug in the power cord and switch on the station.
5. Select the temperature and airflow.
6. Wait until the temperature is stable: the heating indication blinks.
7.3 QFP Soldering
1. Apply a suitable quantity of solder paste and flux (preferably no-clean) and place
the SMD on the circuit board.
2. Preheat the SMD.
3. Heat the lead frame evenly.
4. When soldering is finished, wash the area with a defluxer.
5. Inspect all joints carefully.
7.4 QFP Desoldering
1. Hold the nozzle directly over the IC and wait for the hot air to melt the solder. Be
careful not to touch the IC or the leads with the nozzle.
2. Once the solder has melted, remove the IC using pliers.
3. Clean the remaining solder chips with a wick or a desoldering iron.
V. 01 – 16/03/2018
VTSSD5
7 ©Velleman nv