Appendix b – troubleshooting – Elecraft XV Transverter Owner's Manual User Manual
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Appendix B – Troubleshooting
RF Power Module U7 voltages:
Transverters
U7 Pin (from rear)
RX Mode
TX Mode
XV50,
XV144,
XV222, &
XV432
1 0
do not
measure
2 13.6
3
0
3.5 – 4.5
4 0
do not
measure
Typical Voltages at test points (VDC unless otherwise noted):
Location
Rx Mode
Tx Mode
TP1
XV50
0.8 – 1.2
0.8 – 1.2
XV144
1.2 – 1.8
1.2 – 1.8
XV222
1.0 – 1.5
1.0 – 1.5
XV432
2.2 nom.
2.2 nom.
TP2
XV50, 144, 222
200-275 mV
N/A
XV432
5.0
VDC
N/A
TP5 XV50 N/A
-
XV144
N/A
-
XV222
N/A
-
XV432
N/A
9*
TP6 XV432
Only N/A 1.5*
* at 20 watts output.
Typical voltages active devices (VDC unless otherwise noted):
Location
Rx Mode
Tx Mode
U6 Output
Pin
0 5
U4 1
13.6
13.6
2
0
0
3
5
5
Q2
B
0.25 – 0.8
0.25 – 0.8
E
0
0
C
6.5
6.5
Q1 B
4,1
4.1
E
3.6
3.6
C
8.5
8.5
U5 Output
Pin
0 4.7
U1
Output Pin
3.0 – 6.0
0
U3 Input
0
13.6
Output
0
5