【 Weak current College 】 LED application of common methods 】

Product application knowledge and performance testing is as follows: (1) soldering iron welding: soldering iron (maximum 30W) tip temperature does not exceed 300 ° c; welding time is no more than 3 seconds; welding position at least 2 mm from the gel. (2). immerse the welding: welding maximum temperature 260 ° c; leaching welding time is no more than 5 seconds; dip soldering position at least 2 mm from the gel. PIN forming methods: (1) required from colloidal 2 mm to bend bracket. (2) Stenting must clamp or professional to complete. (3) Stenting must be completed before welding. (4) Stenting guarantee pin and spacing and circuit board. LED installation method (1) attention to various devices outside of the arrangement, in case the polarity misplaced. Device is unavailable and the heating elements are too close, working conditions should not exceed the limits of its provisions. (2) make sure the pins deformation to install LED. (3) when deciding on the hole installation, calculation of good face and circuit board hole distance of dimensions and tolerances in order to avoid excessive pressure support. (4) installation of the LED, Jian-Yi complaints with guide bushings. (5) in the welding temperature return to normal before it is necessary to avoid that LED to any vibration or impact. Cleaning when chemicals cleaning gel should be especially careful, because some of the chemicals on the colloid surface damage and cause discoloration as trichloroethylene, acetone, etc. Available alcohol wipe, impregnation, time at room temperature no longer than 3 minutes. Operating and storage temperature: (1) LED LAMPS led Topr-25 ° c ~ 85 ° c, Tstg-40 ¡æ ~ 100 ¡æ (2) LED DISPLAYS monitor Topr-20 ° c ~ 70 ° c, Tstg-20 ¡æ ~ 85 ° c (3) OUT-DOOR LED LAMPS pixel tube Topr-20 ¡æ ~ 60 ℃, Tstg-20 ¡æ ~ 70 ℃