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INPUT BOARD RESISTANCE TEST (CONTINUED)
FIGURE F.5 – INPUT BOARD TEST POINTS
INPUT BOARD
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D1 Input Rectifier DC- 
DC+
~–
+ | ~ | R2 |
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R4
PROCEDURE
1. Disconnect power to the INVERTEC® V155-S.
2. Perform the Case Cover Removal Procedure.
3. Perform the Input Filter Capacitor Discharge
Procedure.
4. Visually check for burned areas ont The Input Board (solder side).
5. Disconnect the Blachk lead from the DC- terminal.
6. Check the Input Rectifier Bridge “D1”.
7. Check start resistors “R2” and “R4”. Each should read 20 Ohms. See Figure F.5.