Kenwood TH-K4AT Service Manual page 42

TH-K4AT/K4E
Item Condition
10. VOX To exit from the Adjustment
Operation Mode, turn the transceiver
Check power OFF and then ON.
1)Frequency: 435.000MHz
VOX Gain: 4
AG: OFF
2)AG: 1kHz/100mV
11. DTMF Detector: P-P/2
DEV HPF: OFF
Check LPF: 15kHz
De-emphasis: OFF
TX power: Low
1)Frequency: 435.000MHz
Send DTMF code "D"
Note: For details of sending DTMF code "D",
refer to the "Single Tone Mode" on page 27.
12. 1750Hz Detector: P-P/2
Tone DEV HPF: OFF
Check LPF: 15kHz
(E type only) De-emphasis: OFF
TX power: Low
1)Frequency: 435.000MHz
Send 1750Hz Tone
13. Protection TX power: High
Check 1)Frequency: 435.000MHz
(DC IN ANT: OPEN
terminal: 13.8V) PTT: ON
Adjustment points
TX-RX unit (A/3)
Component side view
LV
VR5
B
VR6
BTEMP
GND
VR1
TX-RX UNIT (A/3)
Component side view
J2
DC IN
VR1 : TX frequency
VR5 : MAX DEV
VR6 : DCS modulation valance
LV : VCO lock voltage terminal
42
ADJUSTMENT
Test equipment
AG
Linear detector
Am meter
SET
LCD
J3
J4
MIC
SP
Measurement
Unit Terminal Unit
TX-RX MIC
(A/3)
ANT
ANT
Adjustment
Specifications/
Parts Method
Check Does not
transmit.
Transmits.
Check 2.0kHz - 4.2kHz
Check 2.5kHz - 4.5kHz
Check 2.4A or less
Remarks