Sonics E-Series - Manual (Page 9)

14) Test each bridge rectifier for a short by using the resistance setting on the multimeter. There will be 4
different readings on each bridge rectifier. Replace any that are shorted (Part no. 824-00033).
Reading 1 Reading 2
Reading 3 Reading 4
14) Check for a shorted main power relay using the multimeter on the resistance setting. If it is shorted, replace
with part no. 866-00036.