Vdc Power Supply (Pn 30-39348-02) - DEC Rackmount 7000 AXP Installation And Owner's Manual

Removal and Replacement

5.2.7 48 Vdc Power Supply (PN 30-39348-02)

Perform the following procedure to remove the 48 Vdc power supply:
Before performing the following removal and replacement
procedures, switch off the circuit breakers on the back of the
LSB chassis and on the power controller.
Special instructions apply to extend the LSB chassis to prevent
personal injury (see Section 5.2.2).
1. Extend the LSB chassis for service (see Section 5.2.2).
2. Remove the left side cover (see Section 5.2.6).
3. Disconnect the connectors from J1 and J4 on the power supply (see
Figure 5–7).
4. Use an adjustable wrench to remove the nuts from the POS and RTN
terminals on the power supply (see Figure 5–7).
5. Remove the wires from the POS and RTN terminals and ensure that they are
properly labeled for reconnection (see Figure 5–7).
6. Remove the wires from the cable clamps (see Figure 5–7).
7. Remove the nine screws that secure the power supply to the chassis and lift
the power supply out of the chassis (see Figure 5–7).
To replace the 48 Vdc power supply, reverse steps 1 through 7.
5–14 Removal and Replacement
WARNING
WARNING