The Keyboard

2.  Circuit Board Troubleshooting Techniques A)       Confirm the real problem in the circuit or the problem due to the error in the circuit  B)       consider a visual inspection first in the circuit C)       Select the troubleshooting tools D)       power the circuit E)       check the power supply block or points F)        check the individual components G)      check the main controller H)      check the loads on each component by the metered power supply 3)       What is the soldering bit temperature? Soldering temperature range of 300 to 400 °C 4)       What is a DC chopper? A chopper is  a device that converts fixed DC input to a variable DC output voltage directly . Essentially, a...