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4-17
Servicing Precautions
5. Remove the nuts and lockwashers and disconnect the heavy red and
black cables from the studs. If this is the upper supply in a redundant
system, remove the extension studs and the second set of heavy cables
from this supply as well.
6. Disconnect the small multi-wire connector from the top of the circuit
board in the left compartment of the power supply frame and feed it
back through the holes into the +5 Volt supply compartment.
7. At the right side of the compartment, on the rear of the +5 Volt supply,
remove the terminal block cover (if present) and disconnect the blue
and brown AC power wires from the terminal block. The green/yellow
wire may be left in place.
8. Open the door at the front of the power supply frame.
9. Remove the two screws at the bottom that secure the +5 Volt supply
assembly to the power supply frame.
10. Slide the supply assembly forward out of the frame, taking care that the
wiring follows freely.
(For Upper Supply in
Redundant
Power System
also Remove
Intermediate Studs
and Wires)
Disconnect
Connector from
Circuit Board
Remove Nuts
and Wires
from Studs
Disconnect
Blue and
Brown Wires
0347-0419
Black
Black
Red
Red
Feed Cable and
Connector through
Hole in Frame
Figure 4-6. Removal of Pioneer +5 Volt Power Supply Assembly