Specifications

STEP 9: Remove the four flat head screws that secure the power
supply to the tray. Slide the power supply away from the
front of the tray, loosen the lugs at the front of the power
supply, and remove the AC harness. The harness wires are
color-coded as follows:
Power Supply AC Terminals Wire Color and Size
L (AC live) Brown/black (14 awg)
N (AC neutral) Blue/black (14 awg)
G (AC ground) Green/yellow (14 awg)
STEP 10: Remove the two-way Power Fail cable from this power
supply and plug it into the replacement power supply. Make
sure this cable is seated firmly in the replacement supply. If
the Power Fail signal is not connected properly, the battery
backup function does not work, and it clears the Switcher
board RAM every time the Signal Chassis is reset or
power-cycled.
STEP 11: The power supply is normally aligned at the factory and
should not require further adjustment. However, if you want
to adjust the replacement supply, you must do it at this point,
before installing it in the chassis. See the discussion at the end
of this installation procedure for more information.
STEP 12: Reconnect the AC harness wires according to the chart on the
previous page.
STEP 13: Install the replacement power supply to the mounting tray,
securing it with the four 6-32 x 5/16" flat head screws.
Reconnect the DC harness wires according to the chart on the
previous page. The assembly is now ready for reinstallation.
STEP 14: Guide the power supply tray far enough into the chassis so
that it clears the rear locating tabs. Set it down on the bottom
of the chassis and pull it forward so that it is located under
the rear tabs and flush with the front of the chassis. Install the
two M4 flat head screws to secure the power supply tray to
the chassis front.
Assembly Removal /Replacement 8150 Technical Guide
5-66
Engineering Setup
9100-0212-04 - May 2000