Kenwood TM-441A - Manual (Page 51)

7-3 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. 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-6; CTCSS is operating.
1. Turn the SQL control counterclockwise.
2. Press the TONE/T.ALT key to turn off the
cress
No transmitter output. 1. Microphone 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. The DIM had been selected too dark.
1. Check voltage for 13.8 VDC ± 15 %.
2. Press the F key and the LOW/DIM key.
See page 48
Memory cannot be backed up. Back up battery voltage is low. See Microprocessor memory backup page 21.
The display will not change when the tuning
control is rotated or a key is pressed. 1. The lock is on.
2. A.LOCK is on.
1. Press the MHz/LOCK key within ten
seconds of pressing the F key.
2. Hold down the MHz/LOCK key, switch
the power on, then perform the opera­
tion in 1.
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