EA3GCY EGV-40, Инструкция по сборке

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EGV-40 CW QRP Transceiver Page 31
IF YOUR KIT DOES NOT WORK AFTER ASSEMBLY
Don't worry, it is not uncommon a non working kit on the first try; be calm as in the majority of cases they
are small mistakes with a simple fix.
Most faults are due to poorly soldered connections or misplaced parts; it is very rare to find a faulty part.
Before taking any measurements with instruments, check all connections, inspect your soldering work
looking for cold connections, shortcircuits between tracks, sockets not making good contact, or parts
placed in the wrong place.
If your kit does not work after final assembly, please follow these steps in order:
-Double-check every step in the assembly manual, pads soldered, and right parts placed in their right
position.
-If you have access to instrumentation, take readings, and follow the signals on the circuit to diagnose
what is happening and why.
-Talk to a ham with experience on kits or a technician to check your work. A fresh look to your circuit
may find things you had overlooked.
-In case of need, your request for technical assistance by email to
ea3gcy@gmail.com is welcomed. As
a last resource, you may send the kit for a repair; I will have to charge, though, the repair needed, but I
will try the cost will be as moderate as possible.
To help you troubleshooting your rig, it may be useful the following voltage table. The voltages on the
IC’s and transistors have been measured on Reception and on Transmission. If there is a fault, it is quite
probable that one or more readings will be largely different.
Voltages while on reception without signal on the antenna. PSU voltage 13.8V.
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12
B
0 4.75 (G)3.67 (G)3.67 0 0 3.75 3.87 13.75 0 0 0
C 0 5.90 (D)4.80 (D)4.82 3.67 1.39 7.90 7.90 13.8 0 0 0
E 0 4.10 (S)4.80 (S)4.80 0 0 4.30 3.93 0 0 0 0
IC1 IC2 IC3 IC4 IC5 IC6 IC7
1 1.39 1.39 1.34 Out 5.96 Out 7.98 0 Out 0.0
2 1.39 1.39 0 -- -- 0 --
3 0 0 0 -- -- 0 --
4
4.74 4.80 0 -- -- 0 --
5 4.76 4.80 6.81 -- -- 0 --
6 5.84 5.90 13.60 -- -- 0 --
7 5.23 5.43 6.90 -- -- 0 --
8
5.90 5.90 1.34 -- -- 0 --