Troubleshooting - Icom IC-T90A Instruction Manual

If your transceiver seems to be malfunctioning, please check
the following points before sending it to a service center.
PROBLEM
No power comes ON. • The batteries are exhausted.
• The battery polarity is reversed.
No sound comes from the • Volume level is too low.
speaker. • Different tone is selected with tone/DTCS
squelch.
Transmitting is • The batteries are exhausted.
impossible. • A frequency outside of the 50/144/440
MHz amateur bands is set.
No contact possible with • Different tone is selected with tone/DTCS
another station. squelch.
Tuning dial or [Z]/[Y] • Tuning dial and [Z]/[Y] functions are
function is strange. exchanged.
Frequency cannot be set. • The lock function is activated.
• Memory or call channel is selected.
No beeps sound. • Beep tones are turned OFF or the beep
tone level is low.
Receive audio is • The operating mode is not selected
distorted. correctly.
Desired set mode item • The desired set mode item is in expanded
cannot be selected. set mode 1 or 2.
• Some set mode items can be selected
from VFO or memory mode only.
POSSIBLE CAUSE

TROUBLESHOOTING

SOLUTION
• Replace the batteries or charge the battery pack.
• Check the battery polarity.
• Push [Y] to a suitable level.
• Check the tone using tone/DTCS scan.
• Replace the batteries or charge the battery pack.
• Reset the frequency within the 50/144/440 MHz
amateur bands.
• Check the tone using tone scan.
• Push [1 V↔D] for 1 sec. to cancel the function.
• Push [CALL/TV LOCK] for 1 sec. to cancel the function.
• Push [VFO] to select VFO mode.
• Turn beep tones ON or set the beep tone level to
appropriate level in set mode.
• Select a suitable operating mode in set mode.
• Turn the expanded set mode 1 or 2 ON.
• Enter set mode from appropriate operating mode.
11
REF.
pgs. 1, 14
p. 1
p. 17
p. 70
pgs. 13, 14
p. 19
p. 70
p. 23
! ! 0 0
! ! 1 1
p. 74
p. 20
pgs. 58,
59
p. 21
p. 55
pgs. 17, 18
22, 27
82