Main Unit (Lot. 116 ~) Circuit Diagram - Yaesu FT-7900R Technical Supplement

[+1.4 dBµ] [+18.8 dBµ]
[–4.3 dBµ]
0.81 V
0.30 V
1.37 V
(+15.8 dBµ)
0.97 V
2.22 V
0.15 V
(+0.8 dBµ)
(–6.2 dBµ)
8.13 V
0.32 V
0.78 V
(–8.6 dBµ)
[–9.2 dBµ]
(12.60 V)
[12.54 V]
(xxx): Freq. = 146.05 MHz
[xxx]: Freq. = 440.05 MHz
(xxx): Freq. = 146.05 MHz
[xxx]: Freq. = 440.05 MHz
FT-7900R/E Technical Supplement
[+15.5 dBµ]
1.48 V
1.10 V
0.50 V
8.57 V
0.69 V
4.75 V
8.56 V
4.94 V
[+15.9 dBµ] 1.56 V
5.83 V
0.98 V
0.43 V
8.83 V
0.70 V
2.92 V
8.53 V
0.71 V
0.71 V
8.70 V
4.69 V
(3.55 V)
[3.30 V]
(12.73 V)
[12.76 V]
(3.25 V)
[3.62 V]
(11.45 V)
[11.23 V]
45.05 MHz 45.05 MHz
(+21.6 dBµ)
(+12.3 dBµ)
[+21.0 dBµ]
[+11.6 dBµ]
0.83 V Q1023
4.94 V
Pin 1: 4.79 V
Pin 4: 4.81 V
0.13 V
Pin 8: 0.65 V
Pin 10: 4.81 V
2.22 V
45.05 MHz
0.82 V 0.71 V
(+23.4 dBµ)
[+22.6 dBµ]
2.09 V
0.23 V
0.11 V
0.68 V
1.23 V
4.72 V
0.69 V
4.67 V
6.68 V
MAIN Unit (Lot. 116 ~)
1.42 V
AM: 2.03 V
2.00 V
2.00 V
0 V
AM: 3.74 V
2.00 V
1.10 V
AM: 3.35 V
2.33 V 1.78 V
2.33 V
1.78 V
2.01 V
1.91 V
2.00 V
4.98 V
0.91 V
0.93 V
1.89 V
1.89 V
1.88 V
8.80 V
8.82 V 8.86 V
8.65 V
8.87 V 8.86 V
8.17 V
4.98 V
4.90 V
5.65 V
5.00 V
4.86 V 4.97 V
Circuit Diagram
Q1034
Pin 2: 8.33 V
Pin 14: 8.40 V
Pin 15: 3.57 V
Pin 16: 3.27 V
0 ~ 4.90 V
13.78 V
7.00 V
1.40 V
4.86 V
13.78 V
13.05 V
8.95 V
4.98 V
13.80 V
0.70 V
0.12 V
5.00 V
4.95 V
4.56 V
5.00 V
F-5