D77 is correct in the schematic of this radio model however, it is labeled incorrectly in the PCB as D62. In this case, ensure D62 cathode is used for AM adjustment on T11 for maximum signal. Also TP1 TP2 and TP3 are labeled just as "TP" in in the PCB layout and the schematic. TP1 is located near C243, TP2 is located near R213 and TP3 is located near R119. No problem helping others. Not sure why hide this valuable information here.