Fuse Replacement; Maintenance; Cpu Resetting - Icom IC-910H Instruction Manual

n Fuse replacement
If a fuse blows or the transceiver 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 transceiver when changing a fuse.
The IC-910H has 2 types of fuses installed for trans-
ceiver protection.
• DC power cable fuses �������� FGB 30 A
• Circuitry fuse ������������ FGB 4 A
CIRCUITRY FUSE REPLACEMENT
The 13.8 V DC from the DC power cable is applied to
all units in the IC-910H, except for the power amplifi-
er, through the circuitry fuse. This fuse is installed in
the PA unit.
q Remove the top cover as shown on p. 71.
w Remove the 11 screws from the PA shielding plate,
then remove the plate.
e Replace the circuitry fuse as shown in the diagram
at right.
r Replace the PA shielding plate and top cover.
n CPU resetting
Resetting CLEARS all programmed contents in
memory channels and returns programmed values
in set mode to default values.
When first applying power or when the function
seems to be displaying erroneous information, reset
the CPU as follows:
q Make sure the transceiver power is OFF.
w While pushing [MW 4] and [M-CL 5], push
[POWER] to turn power ON.
• The internal CPU is reset.
• The transceiver displays its initial VFO frequencies
when resetting is complete.
DC POWER CABLE FUSE REPLACEMENT
30 A fuse
[POWER]
11

MAINTENANCE

Circuitry fuse (4 A)
[MW 4] [M-CL 5]
77