Use Replacement; Clock Backup Battery Replacement; Fuse Replacement - Icom iC-7850 Instruction Manual

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■ Fuse replacement

When no external DC output is available from [EXT
DC] and ACC connectors, the internal fuse may be
open. Replace the fuse in this case.
RWARNING! DISCONNECT the AC power cable
from the AC outlet before removing the transceiv-
er's cover.
CAUTION: The transceiver weighs approximately
23.5 kg (52 lb). Always have two people available to
lift or invert over the transceiver.
q Remove the bottom cover.
w Replace the open fuse with a new, properly rated
one (TYPE 1202 FUSE 2 A) as shown at right.
e Replace the bottom cover.

■ Clock backup battery replacement

The transceiver has a lithium backup battery (CR2032)
inside for clock and timer functions.
When the backup battery exhausted, the transceiver
transmits and receives normally but cannot retain the
current time.
RWARNING! DISCONNECT the AC power cable
from the AC outlet before removing the transceiv-
er's cover.
q Remove the top cover.
w Replace the clock backup battery, located near the
front panel as illustrated at left.
• Make sure the battery polarity is correct.
e Return the top cover to the original position.
r Set the date and time in Time set screen.
For Users in California (U.S.A.)
This CR2032 Lithium Battery contains Perchlorate
Material—special handling may apply.
See http://www.dtsc.ca.gov/hazardouswaste/perchlorate
(p. 14-2)
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MAINTENANCE