Kenwood TK-260G Service Manual page 34

TK-260G/270G
Repair Jig (Extention Flat cable : part No.
E37-0851-05)
This cable is used for connecting the TK-270G display unit
and TX/RX unit when you test or repair the transceiver.
Caution :
You must connect TK-270G display unit when you
test or repair the transceiver.
Test Mode (TK-270G only)
Test mode operating features
This transceiver has a test mode. To enter test mode,
press the [2] key and turn the power on. Hold the [2] 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.
[MON] Monitor ON and OFF.
[LAMP] Changes wide and narrow.
°
[ ] Sets to the Tuning mode.
•
[ ] Unused
[2] RF power HIGH and LOW.
[3] Changes signalling.
[O] to [9], Used as the DTMF keypad. If a key is pressed
and [#],[∗] during transmission, the DTMF corresponding
and [A] to [D] to the key that was pressed is sent.
[ENCODER] Changes channel.
• LCD indicator
"LO" Lights at RF Power Low.
" " Lights at moniter ON.
• LED indicator
Red LED Lights during transmission. Blinks during low
battery voltage warning.
Green LED Lights when there is a carrier.
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ADJUSTMENT
Display unit
Extention Flat cable
TX/RX unit
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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)
Channel No.
RX Frequency
1 162. 05000
2 150. 05000
3 173. 95000
4 162. 00000
5 162. 20000
6 162. 40000
7~16
Signalling
Signalling No. RX
1 None
2 None
3 QT 67.0Hz
4 QT 151.4Hz
5 QT 210.7Hz
6 QT 250.3Hz
7 DQT D023N
8 DQT D754I
9 DTMF DEC, (159D)
10 None
11 2 tone 321.7/928.1Hz None
12 Single tone 1200Hz
• 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
8Ω 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.
LCD display (Test mode)
1
channel No.
K, M
TX Frequency
162. 00000
150. 00000
174. 00000
162. 00000
162. 20000
162. 40000
TX
None
100Hz square wave
QT 67.0Hz
QT 151.4Hz
QT 210.7Hz
QT 250.3Hz
DQT D023N
DQT D754I
DTMF ENC, (159D)
DTMF tone 9
Single tone 1200Hz
1
Signalling No.