Troubleshooting - Kenwood TH-78A Instruction Manual

TROUBLESHOOTING

He following problems are generally caused by improper transceiver operation or connection, not by defective
components. If you experience any of these problem, check the causes and corrective actions before requesting
service.
Symptom
Indicators do not light and no
receiver noise is heard when the
POWER switch is turned no.
No sound from the speaker.
No signal can be received.
No control works
Memory channel cannot be
recalled.
Memory cannot be backed up.
Probably Cause
1. Low voltage.
2. With optional DC cable
1) Bad power cable or
Connections
2) Blown power supply fuse.
1. Squelch is closed.
2. With the TSU-7: CTCSS
is operating
3. DTSS is operating
4. Paging is operating
1. LOCK is ON
2. T.ALT is ON.
Nothing is stored in the
memory channel.
1. Battery voltage is low.
2. Battery case removed.
Page 48
Corrective Action
1. Recharge/replace the battery.
2.
1) Check cables and connections.
2) Check for the cause of the blown
fuse and replace the fuse.
1. Turn the SQL control counterclockwise.
2. Press the F key, then press the 3 key to
turn off the CTCSS.
3. Press the F key, then press the 2 key to
turn off the DTSS.
4. Press the F key, then press the 1 key to
turn off the Paging.
1. Press the F key, then press the M key.
2. Press the F key, then press the 5 key.
See Using the Memory (page 15).
1. Recharge the battery.
2. Install the Battery case.