ST3 6-10kVA Service Manual Rev.1Allis Electric Page 10 of total 13 September 20063. Troubleshooting3.6 PFC / Boost / Inverter IGBT Driver Module Analysis6/10kVA-Boost-Right side6/10kVA-Boost-Left sideStep Checked components InstrumentfunctionReferenceValueFailure ModeZD201 V 0.7V 0VQ201,Q202 V VBE=0625V,VBC =0.625V0V1(RED)R203,R205 Ω 10Ω OpenD201 V 0.580V 0V2(BLUE)Q01 V VSD =0.5VVSG=2.225V0V