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TROUBLESHOOTING GUIDE
If your DAP25 is powered up but does not work at all, re-check the following:
•
Is that disk on the top soldered to the feed through wire?
•
Are there any questionable solder joints that may be shorted?
•
Check all the surface mount solder connections for proper placement.
•
Use a voltmeter and verify the output of U1 is biased for about 4VDC
Still having trouble?
While we had hoped that it wouldn't come to this, if you are still having trouble
with your DAP25 here are a few additional suggestions.
Use a methodical, logical troubleshooting technique. Most problems can be
solved using common sense. A volt-ohm meter and a clear head are usually all
that are needed to correct any problem. Most problems are due to misplaced
parts and/or bad solder connections. Working backwards through the assembly
steps will often lead you to the problem. Re-visit the extensive theory of
operation include in this manual, and try to apply to your specific problem.
Have another set of eyes look through your work. Here at the shop we have
often run into a "stone wall" of a problem only to have a fellow technician see
our obvious error. It is sometimes very difficult to see your own mistake, taking
a break can often solve this common problem.
Please understand that it is nearly impossible to "troubleshoot" by phone, any
specific questions should be documented and sent to us by mail.
CONCLUSION
We sincerely hope that you enjoy the use of this Ramsey product. As always,
we have tried to compose our manual in the easiest, most user-friendly format
that is possible. As our customers, we value your opinions, comments, and
additions that you would like to see in future publications. Please submit
comments or ideas to:
Please also feel free to visit our Website at www.ramseyelectronics.com and
offer your observations to other kit enthusiasts as well.
Ramsey Electronics Inc.
Attn. Hobby Kit Department
590 Fishers Station Drive
Victor, NY 14564
DAP25 • 18
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