Kenwood TK-80 Service Manual page 111

Adjustment
Item
1. Automatic
antenna
tuner check
Terminal Function
CN No. Pin No. Pin Name
CN3 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Downloaded from www.Manualslib.com
KAT-2 (Internal Automatic Antenna Tuner)
Condition
1) Display: 2MHz
Mode: CW
Dummy load: 20Ω
Set silver-point of TC1 to 45°
Silver-point
Press [AT TUNE] key
2) Dummy load: 150Ω
Press [AT TUNE] key
3) Dummy load: 50Ω
Press [AT TUNE] key
Function
POD1 VC101 position detection signal
POD2 VC102 position detection signal
VREF AT reference voltage (5V)
ATG AT GND
PR22 Motor rotation direction control 4
PR21 Motor rotation direction control 3
PR12 Motor rotation direction control 2
PR11 Motor rotation direction control 1
ATA AUTO/THRU switch
APRE Preset control select
SPED Motor speed control
ATI Preset AT install. "L": Install
14S 14V (switched)
5A 5V
DGND Digital GND
DGND Digital GND
manuals search engine
Measurement
Test-
Unit Terminal Unit
equipment
Oscilloscope AT
Dummy
load
CN No. Pin No. Pin Name
W1
W2
W103
Adjustment
Parts Method
TC1 Check
Function
1 AT1 AT signal 1
2 GND GND
1 AT2 AT signal 2
2 GND GND
1 24AT AT band bata 22.00000~26.99999MHz
2 21AT AT band bata 19.00000~21.99999MHz
3 18AT AT band bata 14.50000~18.99999MHz
4 28AT AT band bata 27.00000~29.99999MHz
5 14AT AT band bata 8.00000~14.49999MHz
6 4AT AT band bata 2.40000~4.49999MHz
7 7AT AT band bata 4.50000~7.99999MHz
8 GND GND
TK-80
Specifications/
Remarks
SW meter decreases,
then AT is stop.
97