Troubleshooting
If the amp doesn't work, there is a 95% chance that there is a solder problem, either an open
joint or shorted leads.
Go back and inspect all of the solder joints one by one. If any look suspect, re-heat them
with the soldering iron. It is common for novice soldiers to get solder on the exposed lead,
but not flow the solder onto the PCB pads. The joints should look like little volcanoes, with a
solder "fillet" from the lead to the pad.
Good Bad
If there is a big blob of solder, remove the excess using solder braid, or heating it and
whacking the board against a table (gently!).
If the solder is good, the next most likely issue is that a component is installed incorrectly.
This can mean a part is installed the wrong orientation, or a part is installed in the wrong
place. Look over the board. Sometimes it helps to have somebody else inspect it - often you
will overlook the same error over and over again, when somebody else will spot it right away!
It is very unlikely that a component is defective when shipped. However, parts can get
damaged if they are installed incorrectly and power is applied. That's why it is VERY
important to check the assembly BEFORE applying power!
If you have some electronics experience, you should be able to go through the schematic,
and check voltages to isolate the problem. If you are a newbie, you might need to solicit help
from somebody.
Содержание NuHybrid
Страница 6: ......
Страница 8: ...When you re done the board should look like this...
Страница 17: ...8 Install the test points There are three small test points installed near the opamps Insert them and solder...
Страница 30: ...Appendix 2 Schematic You can also download this in PDF form from www pmillett com...
Страница 31: ...Appendix 3 Mechanical Drawing You can also download a DXF or PDF file at www pmillett com...