Accom ASWR8150, Техническое руководство

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Backup Battery Removal/Replacement
The 8150 uses a sealed 6V lead-acid battery to power and refresh the
on-board 8MB DRAM when the 8150 is not powered. Because of its size,
the backup battery is located on the floor of the chassis, not on the
Switcher board. Change the backup battery, if needed, as follows. You
can usually do this without removing the chassis from the rack.
You need these tools: the Accom supplied board inserter/extractor tool,
an ohm meter, and a 5.5mm nut driver.
WARNING: This procedure involves removing
the Switcher board from the chassis, which
clears the battery backed memory. Be sure to
save all needed Engineering, Personality,
Effects, and User files to a floppy disk before
beginning this procedure.
STEP 1: Remove the front panel from the Signal Chassis by grasping
the lower left and right sides and pulling slightly up and
toward you. Power the Signal Chassis off and remove the
power cord.
STEP 2: Insert the board insertion/extraction tool over the stud at the
front right edge of the Switcher board. Lever the board out
with the tool and set the board aside on a clean, static-free
surface.
STEP 3: Remove the four M3 nuts that hold the battery bracket to the
floor of the chassis. (You may have to hold the power harness
out of the way while loosening the right-side nuts.) Lift the
bracket up to clear the mounting studs and remove it from
the chassis.
STEP 4: Disconnect the battery harness from Motherboard connector
J18 and remove the battery from the chassis.
8150 Technical Guide Assembly Removal /Replacement
9100-0212-04 - May 2000
Engineering Setup
5-69