If your adaptable buzz is baptize accident and actualize some problems.Example adaptable ear section not work.Your adaptable buzz is on but afterwards few additional it shutdown.Or your adaptable buzz affectation white.your adaptable buzz key pad not plan properly.you can adjustment your adaptable buzz yourself.Sample accessible your adaptable buzz with adaptable buzz acclimation accoutrement and apple-pie the PCB apathetic with CTC(carbon tetra cleaner).When you apple-pie the PCB apathetic again abolish the ic awning and re hot the UPP ic.Follow my beneath diagram and break the problem.
