Maintenance; I Troubleshooting - Icom IC-2710H Instruction Manual

18

MAINTENANCE

I Troubleshooting

PROBLEM
No power comes on.
No sound comes from the
speaker.
Sub band signals are not au-
dible.
Sensitivity is low and only
strong signals are audible.
No contact possible with an-
other station.
Repeater cannot be ac-
cessed.
Frequency cannot be set.
75
POSSIBLE CAUSE
• Power connector has a poor contact.
• Polarity of the power connection is reversed.
• Blown fuse.
• Volume level is too low.
• The squelch level is set too tight.
• An optional selective call or squelch function is
activated such as tone squelch, pocket beep,
pager or code squelch.
• The sub band mute function is activated.
• Antenna feedline or the antenna connector sol-
der has a poor contact or is short circuited.
• The transceiver is set to semi-duplex.
• The other station is using code or tone squelch.
• Wrong offset frequency is programmed.
• Wrong subaudible tone frequency is pro-
grammed.
• The frequency lock function is activated.
• Priority watch is paused on the watching fre-
quency.
If your transceiver seems to be malfunctioning, please check
the following points before sending it to a service center.
SOLUTION
• Check the connector pins.
• Reconnect the power cable observing the proper
polarity. Replace the fuse, if damaged.
• Check the cause, then replace the fuse.
• Rotate [VOL] clockwise.
• Set the squelch level to the threshold.
• Turn the appropriate function OFF.
• Turn the function OFF.
• Check, and if necessary, replace the feedline or
solder the antenna connector again.
• Set to simplex.
• Turn ON the optional code squelch (UT-49) or
optional tone squelch (UT-104 ).
• Correct the offset frequency.
• Correct the subaudible tone frequency.
• Turn the function OFF.
• Push [ PRIO] to resume the watch.
(M/CALL)
REF.
—
pgs.
13, 77
p. 77
p. 20
p. 20
pgs.
53, 54,
59, 62
p. 23
p. 14
p. 28
pgs.
62, 54
p. 30
p. 29
p. 16
p. 48