15
MAIN Unit
FT-250R Technical Supplement
Circuit Diagram
3.0 V
SQL ON:0 V
6.7 V
SQL ON:0 V
6.9 V
SQL ON:7.0 V
6.1 V
SQL ON:7.0 V
6.8 V
SQL ON:7.0 V
3.5 V
SQL ON:7.0 V
3.3 V
SQL ON:0 V
2.6 V
SQL ON:0 V
2.75 V
SQL ON:0 V
4.4 V
(4.4 V)
4.4 V
(4.3 V)
5.1 V
(5.0 V)
5.2 V
(5.1 V)
3.4 V
(3.4 V)
3.3 V
(3.3 V)
0.0 V
(0.0 V)
0.6 V
(0.5 V)
0.6 V
(0.0 V)
3.1 V
(3.1 V)
5.2 V
(5.1 V)
0.7 V
(0.7 V)
1.3 V
(1.3 V)
2.0 V
(2.0 V)
4.2 V
(4.2 V)
5.2 V
(3.1 V)
4.3 V
3.5 V
(3.5 V)
0.5 V
(0.5 V)
0.6 V
(0.4 V)
2.9 V
(2.8 V)
0 V
(3.6 V)
3.7 V
(0 V)
0 V
(1.4 V)
0 V
(0.7 V)
0 V
(4.4 V)
7.0 V
(6.8 V)
[6.7 V]
5.1 V (0 V)
0 V
(4.9 V)
2.3 V
(5.1 V)
4.9 V
(0 V)
5.2 V
(4.3 V)
1.6 V
(1.6 V)
3.3 V
(3.3 V)
1.0 V
(2.7 V)
0 V
(3.3 V)
5.2 V
(3.1 V)
5.2 V
(5.1 V)
3.4 V
(3.4 V)
3.4 V
(3.4 V)
2.8 V
(2.8 V)
3.4 V
(0 V)
(0.5 V)
5.2 V
(4.5 V)
5.2 V
(0 V)
3.3 V
(0 V)
7.0 V
(6.8 V)
3.4 V
(3.4 V)
3.4 V
(3.4 V)
5.2 V
(5.1 V)
2.4 V
(2.3 V)
2.9 V
(2.8 V)
0 V
(0.6 V)
1.2 V
(1.1 V)
0 V
(3.2 V)
TONE SQL 67.0 Hz - 151.4 Hz:3.1 V
156.7 Hz - 250.3 Hz:0 V
DCS:3.1 V
Wide:0 V
Narrow:0.6 V
CHG OFF:7.2 V
ON:6.4 V
CHG OFF:7.0 V
ON:5.7 V
CHG OFF:7.0 V
ON:0 V
7.0 V
(6.8 V)
[6.7 V]
7.0 V
(6.8 V)
[6.6 V]
7.0 V
(6.8 V)
[6.7 V]
7.0 V
(0 V)
[0 V]
0 V
(2.8 V)
[4.3 V]
0 V
(1.7 V)
0.6 V
(0.0 V)
4.7 V (0.0 V)
2.3 V (0.0 V)
0.7 V
(0.0 V)
0.0 V (0.6 V)
0.6 V (0.0 V)
0.0 V (1.7 V) [2.8 V]
4.9 V
(0.0 V)
4.1 V
(0.0 V)
0.7 V
(0.0 V)
0.7 V
(0.0 V)
Wide:0.0 V
Narrow:0.6 V
Wide:0.6 V
Narrow:0.0 V
3.0 V
(3.0 V)
3.4 V
(3.4 V)
MON/LAMP SW OFF:3.3 V
MON SW ON:2.1 V
LAMP SW ON:1.7 V
0.0 V
(3.4 V)
Shift ON:3.3 V
OFF:0.0 V
Wide:0.0 V
Narrow:3.3 V
Shift
ON:1.6 V
OFF:1.5 V
Shift
ON:2.2 V
OFF:0.0 V
3.4 V
(3.4 V)
LAMP
ON:1.8 V
OFF:0.0 V
LAMP
ON:1.1 V
OFF:0.0 V
LAMP
ON:3.0 V
OFF:5.6 V
LAMP
ON:3.0 V
OFF:5.6 V
LAMP
ON:2.7 V
OFF:5.6 V
LAMP
ON:5.0 V
OFF:5.6 V
3.3 V
(0.0 V)
2.7 V
(0.0 V)
0.0 V
(2.7 V)
0.0 V
(3.3 V)
4.1 V
(5.0 V)
4.9 V
(4.7 V)
RX
(TX Power Output 0.5 W)
[TX Power Output 5 W]
RX Frequency 146.05 MHz (with ±3 kHz at 1 kHz tone)
Audio Output 0.2 W
AF Dummy Load Impedance 8-ohm
Summary of Contents for FT-250R
Page 4: ...4 FT 250R Technical Supplement Exploded View Miscellaneous Parts Note...
Page 5: ...5 Block Diagram FT 250R Technical Supplement...
Page 6: ...6 Block Diagram FT 250R Technical Supplement Note...
Page 14: ...14 FT 250R Technical Supplement Alignment Note...
Page 16: ...16 MAIN Unit FT 250R Technical Supplement...
Page 30: ...30 MAIN Unit FT 250R Technical Supplement Note...
