
Maintenance and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
7-21
7.3.2 REPLACING BRIDGE INTERFACE BOARD (A3) AND SNUBBER BOARD (A4)
(510 ADC and Below) (Refer to Figures 7-2 and 7-5.)
1. Remove power from the unit.
2. Open base assembly door.
3. Remove cables on bridge interface board.
4. Loosen the two captive screws that secure the bridge interface assembly to
the chassis. Swing the assembly out on its hinges.
5. Remove ground wire.
6. Remove J1 from snubber board (A4).
7. Slide bridge interface assembly off the hinges by lifting upward.
8. Place new assembly on hinges.
9. Replace ground wire.
10. Reconnect J1 cable to snubber board.
11. Tighten two captive screws to hold bridge interface assembly in place.
12. Replace seven cables on bridge interface board and shut the base assembly
door.
13. Reapply power to the unit.
7.3.3 REPLACING BRIDGE INTERFACE BOARD (A3) AND SNUBBER BOARD (A4)
(550 ADC) (Refer to Figure 7-3.)
1. Remove power from the unit.
2. Open the main drive door.
3. Remove cables on bridge interface board.
4. Remove ground wire by pulling off the push-on terminal, located near J3.
5. Loosen the two captive screws that secure the bridge interface assembly to
the chassis. Carefully raise the assembly up about 1/4" and then away
from the base, so that the two tabs at the top separate from the slots.
6. Remove J1 from snubber board (A4).
7. Reconnect J1 cable to new snubber board.
8. Place the new bridge interface assembly in position and insert the two tabs
at the top into the slots on the base.
9. Tighten two captive screws to hold bridge interface assembly in place.
10. Replace ground wire.
11. Replace seven cables on bridge interface board and shut the main drive
door.
12. Reapply power to the unit.
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