37
11
MAINTENANCE
CIRCUITRY FUSE REPLACEMENT
The 13.8 V DC from the DC power cable is applied
to all units in the IC-R75 through the circuitry fuse.
This fuse is installed in the MAIN unit.
q Remove the top cover as shown on p. 34
w Replace the circuitry fuse as shown in the
diagram at right.
e Replace the top cover.
■ Fuse replacement
If a fuse blows or the receiver stops functioning, try
to find the source of the problem, and replace the
damaged fuse with a new, rated fuse.
CAUTION: DISCONNECT the DC power cable
from the receiver when changing a fuse.
The IC-R75 has 2 types of fuses installed for receiver
protection.
• DC power cable fuses FGB 3 A
• Circuitry fuse FGB 3 A
DC POWER CABLE FUSE REPLACEMENT
■ Clock backup battery replacement
The receiver has a lithium backup battery (CR2032)
inside for clock and timer functions. The usual life of
the backup battery is approximately 2 years.
When the backup battery is exhausted, the receiver
receives normally but cannot retain the current time.
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