Kenwood TM-741A - Manual (Page 62)

•IN CASE OF DIFFICULTY
The problems described in this table are failures caused, in general, by improper operation or connection of the
transceiver, not by defective components. Examine and check according to the following table.
Symptom Probable cause Corrective action
Indicators do not light and no
receiver noise is heard when the
POWER switch is turned on.
1. Bad power cable or connections.
2. Blown power supply fuse.
1. Check cables and connections.
2. Check for the cause of the blown
fuse and replace the fuse.
No sound from the speaker. No
signal can be received.
1. Squelch is closed.
2. With the TSU-7 : CTCSS is
operating.
1. Turn the SQL control
counterclockwise.
2. Press the TONE/T.ALT key to turn
off the CTCSS.
No transmitter output. 1. Microphone jack is not plugged
in.
2. Poor antenna connection.
1. Plug jack in.
2. Connect antenna securely.
Weak signal cannot be received. Poor antenna connection. Connect antenna securely.
Display is dark. 1. Power voltage is low.
2. DIM had been set too dark.
1. Check voltage for 13.8 VDC ± 15
%
2. Press the F key and the LOW/DIM
key. See page 52.
No memory back up. Backup battery voltage is low. See Microprocessor memory backup
page 29
Clock is wrong. Backup battery voltage is low.
Backup switch is off. Contact the authorized dealer.
See memory backup page 8
The display does not change when
the tuning control is rotated. 1. The LOCK function is on. ■
2. The ALL LOCK function is on.
1. Press the F key, then press the
MHz/LOCK key within 10 seconds.
2. Hold down the MHz/LOCK key,
switch the power on, then perform
step 1 again.
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