Kenwood TK-373G, Service Manual

Page: 28 / 45

TK-373G
28
ADJUSTMENT
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.
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.
Caution :
You must connect TK-373G display unit when you
test or repair the transceiver.
Extention Flat cable
Display unit
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 TX Frequency
1 460. 05000 460. 10000
2 450. 05000 450. 10000
3 469. 95000 469. 90000
4 460. 00000 460. 00000
5 460. 20000 460. 20000
6 460. 40000 460. 40000
7~16
Frequency (MHz) (K2 type)
Channel No. RX Frequency TX Frequency
1 480. 05000 480. 10000
2 470. 05000 470. 10000
3 489. 95000 489. 90000
4 480. 00000 480. 00000
5 480. 20000 480. 20000
6 480. 40000 480. 40000
7~16
Signalling
Signalling No. RX TX
1 None None
2 None 100Hz square wave
3 LTR DATA LTR DATA
4 QT 67.0Hz QT 67.0Hz
5 QT 151.4Hz QT 151.4Hz
6 QT 210.7Hz QT 210.7Hz
7 QT 250.3Hz QT 250.3Hz
8 DQT D023N DQT D023N
9 DQT D754I DQT D754I
10 None DTMF tone 9
• 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
Ω
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.