Tektronix Grass Valley 4000, Installation And Service

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4-21
Servicing Frame Power Supplies
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.
Installation of Todd +5 Volt Supply
1. To install the replacement supply, slide it into place and install the front
mounting screws.
2. Feed the small multi-wire cable from the new power supply through the hole
at the top left of the +5V supply compartment (see
Figure 4-9 ), and on through
the frame to the hole into the Multi-Output supply compartment. If necessary,
gain access from the front of the frame.
3. In the Multi-Output supply compartment, connect the connector on the end of
the multiwire cable to the mating connector at the top of the circuit board.
4. In the +5 Volt supply compartment, ensure that the connector on the other end
of the multiwire cable is securely attached to the mating connector on the
circuit board.
5. Connect the blue AC power wire to the left screw on the AC power terminal
block.
6. Connect the brown AC power wire to the center screw on the AC power
terminal block.
7. If this is the +5 volt supply in a non-redundant power system or the lower +5 volt
supply in a redundant power system, perform
Step 8 through Step 10 .