In Case Of Difficulty - Kenwood TM-721A Instruction Manual

6-4. 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.
the bands each other.
Symptom Probable cause Corrective action
Indicators do not light and no receiver | 1. Bad power cable or connections. 1. Check cables and connections.
noise is heard when the POWER switch is | 2. Blown power supply fuse. 2. Check for the cause of the blown fuse and
turned on. replace the fuse.
No sound from the speaker. No signal can | 1. Squelch is closed. 1. Turn the SQL control counterclockwise.
be received. 2. In the wrong position BALANCE key posi- | 2. Readjust the BALANCE key.
tion.
3. With the TSU-6: (TM-721A only) CTCSS | 3. Press the F key and then MUTE/CTCSS
is operating. key to turn off the CTCSS.
No transmitter output 1. Microphone jack is not plugged in. 1. Plug jack in.
2. Poor antenna connection. 2. Connect antenna securely.
Signals from the SUB band cannot be con- | 1. MUTE is ON. 1. Press the MUTE key to clear MUTE.
troled by VOL control. 2. BALANCE key is switched to MAIN posi- | 2. Set the BALANCE key to center position.
tion.
Weak signal cannot be received. 1. Poor antenna connection. 1. Connect antenna securely.
Display is dark. 1. Power voltage is low. 1. Check voltage for 13.8 VDC 215%.
2. The DIM key had been pressed. 2, Press the F key and the LOW/DIM key.
No control works. 1. LOCK is ON. 1. Set the Lock key to OFF position.
2. During A.B.C. operation, being exchanging | 2. See A.B.C. Page 18.
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