Always check unit before applying power (see Sections 8-2 thru 8-11).
TM-246193 Page 59Invision 352 MPa
8-28. Power Interconnect Board (PC2) - Power Off Checks (Effective With MB510232A Thru
MH474076U)
Power Interconnect Board PC2 DMM Positive Lead DMM Negative Lead DMM Diode DMM Ohms
Pre-Charge Resistor R14 R14 Bottom R14 Top N/A 200
SCR Gate Resistor R10 R10 Left R10 Right N/A 10 - 16.5
SCR Gate Resistor R11 R11 Left R11 Right N/A 10 - 16.5
SCR Gate Resistor R12 R12 Left R12 Right N/A 10 - 16.5
Pre-Charge Diode D5 AC3 R14 Top 0.20 - 0.90 N/A
Pre-Charge Diode D6 AC2 R14 Top 0.20 - 0.90 N/A
Pre-Charge Diode D7 AC1 R14 Top 0.20 - 0.90 N/A
Boost Gate Protection Diode D12 D12 Left D12 Right N/A 100k
Inverter Gate MOSFET Q1 Q1-S (Source) Q1-D (Drain) 0.20 - 0.90 N/A
Inverter Gate MOSFET Q2 Q2-S (Source) Q2-D (Drain) 0.20 - 0.90 N/A
Inverter Gate Protection Diode D2 D2 Left D2 Right N/A 100k
Inverter Gate Protection Diode D3 D3 Left D3 Right N/A 100k
Snubber Gate Protection Diode D9 D9 Left D9 Right N/A 100k
Notes
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