Test Mode - Kenwood TK-373G Service Manual

TK-373G
Repair Jig (Extention Flat cable : part No.
E37-0851-05)
This cable is used for connecting the TK-373G display unit
and TX/RX unit when you test or repair the transceiver.
Display unit
Caution :
You must connect TK-373G display unit when you
test or repair the transceiver.

Test Mode

Test mode operating features
This transceiver has a test mode. To enter test mode, press
the [∞] key and turn the power on. Hold the [∞] key until the
test channel No. and test signalling No. appear on LCD. Test
mode can be inhibited by programming. To exit test mode, switch
the power on again. The following functions are available in test
mode.
• Controls
[PTT] Used when making a transmission.
[Side1] Changes wide and narrow.
[Side2] Monitor ON and OFF.
[A] Sets to the Tuning mode.
[B] Unused
[∞] RF power HIGH and LOW.
[5] Changes signalling.
[ENCODER] Changes channel.
• LCD indicator
"LO" Lights at RF Power Low.
"MON" Lights at monitor ON.
• LED indicator
Red LED Lights during transmission. Blinks during low
battery voltage warning.
Green LED Lights when there is a carrier.
28
ADJUSTMENT
Extention Flat cable
TX/RX unit
Frequency and signalling
The set has been adjusted for the frequencies shown in the
following table. When required. re-adjust them following the
adjustment procedure to obtain the frequencies you want in
actual operation.
Frequency (MHz) (K type)
Channel No. RX Frequency
1 460. 05000
2 450. 05000
3 469. 95000
4 460. 00000
5 460. 20000
6 460. 40000
7~16
Frequency (MHz) (K2 type)
Channel No. RX Frequency
1 480. 05000
2 470. 05000
3 489. 95000
4 480. 00000
5 480. 20000
6 480. 40000
7~16
Signalling
Signalling No. RX
1 None
2 None
3 LTR DATA
4 QT 67.0Hz
5 QT 151.4Hz
6 QT 210.7Hz
7 QT 250.3Hz
8 DQT D023N
9 DQT D754I
10 None
• Preparations for tuning the transceiver
Before attempting to tune the transceiver, connect the unit
to a suitable power supply.
Whenever the transmitter is tuned, the unit must be
connected to a suitable dummy load (i.e. power meter).
The speaker output connector must be terminated with a
8 dummy load and connected to an AC voltmeter and an
audio distortion meter or a SINAD measurement meter at all
times during tuning.
• Transceiver tuning
(To place the transceiver in tuning mode)
Channel appears on the LCD. Set the channel according to
the tuning requirements.
TX Frequency
460. 10000
450. 10000
469. 90000
460. 00000
460. 20000
460. 40000
TX Frequency
480. 10000
470. 10000
489. 90000
480. 00000
480. 20000
480. 40000
TX
None
100Hz square wave
LTR DATA
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 250.3Hz
DQT D023N
DQT D754I
DTMF tone 9