Fuse Replacement; Resetting The Cpu; Maintenance - Icom ic-718 Instruction Manual

 Fuse replacement
If a fuse blows, or the transceiver stops functioning,
fi nd the source of the problem, and repair it.
Then replace the damaged fuse with a new, adequate-
ly rated fuse.
CAUTION:
Turn the power OFF and disconnect
the DC power cable from the transceiver before re-
moving the transceiver's cover.
The IC-718 has 2 types of fuses installed for trans-
ceiver protection.
• DC power cable fuses ........................ ATQ 25 A
• Circuitry fuse .................................... FGB 4 A
CIRCUITRY FUSE REPLACEMENT
The 13.8 V DC from the DC power source is applied
to all units in the IC-718 through the circuitry fuse.
This fuse is in the MAIN unit.
q Remove the top cover as shown on page 48.
w Replace the circuitry fuse as shown in the diagram
to the right.
e Replace the top cover.
 Resetting the CPU
[PWR]
Resetting CLEARS all entered content in Memory
channels and returns entered values in the set
mode to their defaults.
[Z DN] [UP Y]
DC POWER CABLE FUSE REPLACEMENT
25 A fuse
When the unit is new and you are applying power, or
if the function seems to be displaying erroneous infor-
mation, reset the CPU as follows:
q Make sure transceiver power is OFF.
w While pushing [UP Y] and [Z DN], push [PWR] to
turn ON the power.
• The internal CPU is reset.
• The transceiver displays its initial VFO frequencies
when resetting is complete.
10

MAINTENANCE

FGB 4 A
PA unit
53