Service manual

TH-K4AT/K4E
38
ADJUSTMENT
Transmitter section
Item Condition
Measurement Adjustment
Specifications/
Test equipment Unit Terminal Unit Parts Method
Remarks
1. TX power
Write (Battery
terminal: 7.5V)
High power
Mid power
Low power
Battery terminal voltage:
7.5V
Switch to Adjustment mode
and carry out the operations
for adjustment item F.
(Refer to page 29)
1)LCD display: P7L,
Frequency: 430.000MHz
PTT: ON
2)LCD display: P7C,
Frequency: 435.000MHz
PTT: ON
3) LCD display: P7H,
Frequency: 439.995MHz
PTT: ON
Switch to Adjustment mode
and carry out the operations
for adjustment item G.
(Refer to page 30)
4)LCD display: P7L,
Frequency: 430.000MHz
PTT: ON
5)LCD display: P7C,
Frequency: 435.000MHz
PTT: ON
6)LCD display: P7H,
Frequency: 439.995MHz
PTT: ON
Switch to Adjustment mode
and carryout the operations
for adjustment item H.
(Refer to page 30)
7)LCD display: P7L,
Frequency: 430.000MHz
PTT: ON
8)LCD display: P7C,
Frequency: 435.000MHz
PTT: ON
9)LCD display: P7H,
Frequency: 439.995MHz
PTT: ON
DC power supply
DVM
Power meter
Am meter
TX-RX
(A/3)
B
GND
ANT Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Encoder
[MENU]
Write
Write
Write
Write
Write
Write
Write
Write
Write
Note: Do not
use the DC IN
terminal.
4.8W ±0.05W
2.1A or less
1.5W ±0.05W
1.4A or less
0.5W ±0.05W
0.8A or less
Note: Adjust the output voltage from DC power supply until the voltage at the battery terminal
becomes 7.5V while the transceiver is transmitting.