ST3 6-10kVA Service Manual Rev.1Allis Electric Page 5 of total 12 September 20063. Troubleshooting3.3 Boost Analysis6/10kVA-Boost-Right side6/10kVA-Boost-Left sideStep Checked components InstrumentfunctionReferenceValueFailure Mode(E,C) Ω 800kΩ short1 Q306~Q311(G,E) Ω 15.8kΩ short or open2 D308, D310, D309, D311 DIODE 0.35V 0 V3 D302, D304, D306, D303,D305, D307DIODE 12Ω open