Specifications

Maintenance and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
7-25
7.4 REPLACING DRIVE SUB-ASSEMBLY (510 ADC and Below)
(Refer to Figure 7-5.)
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W A R N I N G
HAZARDOUS VOLTAGES WHICH CAN CAUSE SEVERE
INJURY OR DEATH ARE PRESENT DURING THE
OPERATION OF THIS EQUIPMENT. TURN OFF AND
LOCK OUT ALL SOURCES OF POWER BEFORE
MAKING ANY REPAIRS.
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This procedure covers replacement of the entire DC Drive Controller Base Sub-
Assembly. To replace individual power components, such as thyristors and fuses, see
section 7.6.
1. Remove power from the unit.
2. Open front cover.
3. Remove system interconnections (J7, J8, J9) from the microprocessor
board, shown in Figure 7-1.
4. Close cover and open base assembly door.
5. Remove all cables from bridge interface board.
6. Remove ground wire from door.
7. Remove door with microprocessor board from the base assembly.
8. Release two captive screws holding bridge interface assembly to the
chassis. Swing assembly out on its hinges.
9. Remove ground wire from bridge interface assembly.
10. Remove snubber cable connector J1 located on back of bridge interface
assembly.
11. Slide bridge interface assembly up and off of hinges.
12. Remove high voltage wiring at L1, L2, L3, A1, A2, and DB1.
13. Remove wiring from TB1 and GND.
14. Detach unit from panel.
15. Mount spare base assembly to panel using existing hardware.
16. Reattach wiring to TB1 and GND.
17. Reapply high voltage wiring.
18. Slide bridge interface assembly onto its hinges.
19. Replace ground wire on bridge interface assembly.
20. Attach snubber cable at J1 on back of bridge interface assembly.
21. Tighten two captive screws holding bridge interface assembly to base.
22. Slide door on the base assembly.