1.The temperature of welding: the temperature of the solder must be controlled around 350oC. If the temperature is too low, the cold welding point is easy to appear. If the temperature is higher than 400oC, the quality of the solder joints on the small household electrical appliances control board can not reach the standard, so that the plate will fall off or deform.

2, The time of welding: in the welding, the completion of wetting and diffusion of these two links need to use 2-3 seconds, if the time is too fast, will lead to wetting and diffusion of two links only to achieve 1/3. The welding time of IC and triode should be less than 3 seconds, otherwise it will cause damage. For other components, the welding time should be maintained for 4-5 seconds.

3, Solder quantity is appropriate: when welding, solder should be used, if too little solder, will lead to low strength of small household electrical appliances control panel. If too much solder is added, the distance between the insulation will be smaller and the solder joints will be bumping or tin jumping.