73
12 MAINTENANCE
29, 30,
38, 40,
41
49
45
5
5
45
38
38
6, 7
44, 45
25, 41
–
–
83
50
85, 89
–
1Increase the MIC gain control and/or
CAR control clockwise depending on
the mode being used. Review the
appropriate section of the
"COMMUNICATING" chapter for the
mode being used.
2Check antenna connections. Confirm
that the antenna tuner is reporting a low
SWR.
Increase Menu No. 28 (VOX.GAIN).
1Set Menu No. 51 (LINEAR) according to
instructions in "INSTALLATION".
2Inspect the REMOTE connector wiring
and correct.
Press [XIT] to switch ON the function.
Using the XIT function does not change the
main frequency display; XIT only changes
the RIT/XIT display.
1 Review "FM REPEATER OPERATION"
and select the correct frequency and
type of Tone.
2You must transmit on the repeater’s
input frequency and receive on the
repeater’s output frequency. Refer to
"FM REPEATER OPERATION".
1Re-check all connections using this
manual, your TNC/MCP manual, and
your computer hardware manual as
references.
2Confirm that the RIT and XIT functions
are switched OFF. Confirm that you are
NOT operating split frequency.
3Adjust TX and RX levels using Menu
Nos. 20 (PKT.IN) and 21 (PKT.OUT) and
level controls on your TNC/MCP.
4Reorient/relocate your antenna or
increase your antenna gain.
5Set the TNC/MCP TX delay time to
more than 300 ms.
1Correct the cable.
2Use the same parameters in the
terminal program and the transceiver.
Refer to "COMMUNICATION
PARAMETERS".
3Obtain a terminal program that fully
supports the TS-870S protocol. If
designing your own program, refer to
information in "COMPUTER CONTROL
COMMANDS".
4Disconnect the computer from the
transceiver, and run a utility program to
test the computer serial port. Loop back
the computer serial port transmit and
receive pins to test the port fully.
1The MIC gain control and/or CAR
control is set too low.
2Poor antenna system connections are
causing high SWR.
The VOX gain is set too low.
1The LINEAR Menu setting is incorrect.
2The REMOTE connector wiring is wrong
or faulty.
The Transmit Incremental Tuning function is
switched OFF.
1The repeater requires a Tone frequency
for access.
2You are not operating split frequency.
1Physical connections between the
transceiver, computer, and TNC or MCP
are incorrect, or software settings in the
TNC or MCP are wrong.
2Different transmit and receive
frequencies are being used.
3The levels between the transceiver and
the TNC/MCP are incorrect.
4Your transmitted signal or the incoming
receive signal is too weak.
5The TX delay time parameter in your
TNC/MCP is set incorrectly.
1Your RS-232C cable that connects the
transceiver with the computer is wired
incorrectly.
2Communications parameters set in your
terminal program do not match the
parameters in the transceiver.
3If using a third party terminal program
(not supplied by KENWOOD) on your
computer, it is not accurately interfacing
with the transceiver COM port protocol.
4The serial port on your computer is not
functioning correctly.
The transceiver has low
transmit power.
VOX does not operate.
Linear amplifier does not
operate.
Turning the RIT/XIT
control has no affect on
the transmit frequency.
You cannot access and
use 10 meter band
repeaters.
Digital operation results
in few or no connects or
contacts with other
stations.
Attempts at controlling
the transceiver by a
computer have failed.