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Chapter 4
4-3.4
Replacing The Real Time Clock Backup Battery
The real-time clock (RTC) is designed to keep time when the power source
is turned off. The backup battery is a single 3 volt, 250 mAh Lithium coin
cell, and is located near the bottom left corner of the ADFM motherboard in
the electronics housing (see
a. In a non-corrosive atmosphere, remove the top of the unit. Open the
front panel of the Electronic Housing.
b. With a small blade non-conductive screwdriver, gently lift and slip
out the coin cell.
c. Replace with a new coin cell (Panasonic PR2330, or equivalent).
d. Test the system (see
4-4
Fuse Replacement
The electronics chassis contains a mains supply fuse. The fuse is located on
the front panel of the Electronics Housing.
CAUTION. Only fuses with the required rated current, voltage, and
specified type should be used. Do not repair fuses or short circuited fuse-
holders. To do so could cause a shock or fire hazard.
a. Disconnect the mains power cord.
b. In a non-corrosive atmosphere, remove the top of the unit.
c. Use a blade screwdriver to open the fuse holder.
d. Pull out the blown fuse, and replace the fuse. Use only the fuse
specified for the selected mains supply voltage (see
10 or
e. Make sure that the fuse holder is closed before reconnecting the
mains power cord.
f. Test the system (see
page 4-4
Table 4-16, item
Chapter
11).
Chapter
05).
5).
5).
MGD Technologies, Inc.
Table 4-16, item
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