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48
10
MAINTENANCE
PROBLEM
POSSIBLE CAUSE
SOLUTION
REF.
Transmission continues
even when the PTT is re-
leased.
T h e f u n c t i o n d i s p l a y
shows erroneous informa-
tion.
• PTT hold function is activated.
• The CPU is malfunctioning.
• Turn the function OFF.
• Reset the CPU.
pgs. 38,
45
p. 39
■
Fuse replacement
If the fuse blows or the transceiver stops functioning, fi nd the
source of the problem if possible, and replace the damaged
fuse with a new one, rated at (FGB 5 A) as shown at right.
5 A
fuse
IC-440-1.indd 48
IC-440-1.indd 48
2008/06/25 15:59:46
2008/06/25 15:59:46