Glanz WD900B type a microwave, a clock function, users usually use as a long-term power electronic bell. Again because the mains line fault (voltage swells) leaving the control board transformer damage. Removed for inspection, no significant Jiaohu transformer, blistering , smell burning phenomenon, by measuring the primary circuit, the secondary intact but two of its secondary winding voltage to a group of non-conventional 16.33V;... another group of 5.47V × 2 difficult to obtain, only shopped to the same power but only one set of secondary 16.5V transformer so according to the principle of the transformer, using the method shown in Figure modifications restructuring: in the case of the original transformer primary just verified without interruption between turns interlayer short circuit lead 16.33V ends of the transformer secondary winding of the original weld in new 16.5V transformer at both ends; then add the transformer primary is connected to the 220V mains so the original transformer to change into 16.5V/5.5V's. Additional transformers, providing another set of output voltages (5.5V), substitution success.MeUservice manual download site