Vertex Standard VX-4000L Service Manual page 26

Circuit Diagram
13.8V
(13.8V)
1.25V
(0.0V)
1.90V
(8.17V)
1.85V
(0.47V)
1.41V
(0.0V)
1.85V
(0.47V)
1.89V
(0.47V)
8.94V
(8.94V)
13.75V
13.15V
4.36V
(4.36V)
4.36V
(4.36V)
4.34V
(4.34V) 3.84V
VX-4000 VHF Low-band Service Manual
1.55V
(0V)
1.98V
(5.28V)
0.0V
0.22V
(0.0V)
8.82V
(0.00V)
(8.86V)
0.19V
(0.0V)
3.99V
1.28V (0.32V)
(3.77V)
5.24V
(5.41V)
3.78V
0.03V
(3.78V)
(4.93V)
8.83V
(0.0V)
(3.76V)
0.0V
(0.63V)
(8.84V)
8.26V
9.02V
(8.87V)
(0.02V)
0.07V
(8.86V)
0.0V (4.97V)
3.86V (3.86V) 0.26V (0.47V)
1.89V
(0.0V)
(0.47V)
(3.84V)
(0.93V)
3.84V (3.84V)
(0.01V) (0.94V) (0.68V)
(8.75V)
(8.84V)
13.75V
7.81V
(7.80V)
1.77V
(1.48V)
1.77V
(0.02V)
3.04V
(3.54V)
7.87V
(8.01V)
2.81V (2.90V)
(7.80V)
7.43V
4.79V
(0.04V)
(4.93V)
(0.69V)
0.0V
(4.92V)
(1.12V)
(1.21V)
(0.93V)
NB on : 4.92V
NB off : 0.0V
(0.12V)
(0.0V)
0.75V
8.79V
6.04V
2.24V
(5.66V)
(2.90V)
7.74V
(7.83V)
(0.09V) (2.14V)
(2.11V)
(4.84V)
(1.21V)
(0.0V)
(3.9V)
(0.83V)
(2.88V)
(3.89V)
(4.78V)
(4.87V)
[1.94V]
[3.18V]
[7.17V]
[3.16V]
[0.13V]
[1.88V] [1.88V]
[1.93V]
[7.15V]
NB on : 8.42V
NB off : 0.0V
(8.70V)
(8.84V)
(2.20V)
XX : TX 33.1 MHz, MIC Input Level 1 kHz 3.0mVrms (STD Dev), High Power
(XX) : RX 33.1 MHz, RF Input Level 40dbµ emf (MOD=1.0 kHz, Dev=3.0 kHz), EXT SP OUT 10% Distn 14.0W
[XX] : Noise Blanker ON
MAIN Unit (Lot 1 ~)
(2.23V)
(5.55V)
(1.01V)
(5.55V)
(0.96V)
(5.17V)
(4.71V)
(5.21V)
(4.34V)
(8.91V)
(3.02V)
(2.40V)
(3.10V)
[0.69V] [0.65V] [3.20V]
[0.78V]
[0.08V]
[0.0V]
[-0.57V]
[8.19V]
[0.72V]
[2.78V]
[0.07V]
(0.7V)
(6.96V)
6A-1