Troubleshooting - ELECRAFT K 2 Owner's Manual

K2 Manual 1/24/99 V.XC ©1999 Elecraft
11.
This section provides detailed troubleshooting tables that will help you find
and correct problems with the K2. There are five tables (listed below).
shown. In most cases you'll know which table to look in based on the
symptoms you observe. If in doubt, start with the General Troubleshooting
General Troubleshooting
Receiver
Transmitter
INFO Messages:
conditions. If this happens you'll see a message such as "INFO 100" on the
LCD. The 3-digit number in the INFO message tells you which
Note: INFO messages can be cleared by pressing any switch. However, the
cause of these messages should be investigated before continuing to operate
Troubleshooting Tips: When you locate your problem in the table, follow
If you have a problem that isn't addressed specifically, you can often locate
the cause using a combination of signal tracing, DC voltage and resistance
important to keep in mind that actual component failures are fairly rare. In
most cases you'll find that a broken interface cable, cold solder joint,
000-049
050-099
150-199
200-249
Your troubleshooting experience may be helpful to future K2 builders. Feel
free to contact us to report the problem and how you solved it (e-mail
Table Conventions: When referring to components on the various K2
"RF/U11," which means U11 on the RF board.
NOTE: This table will be expanded when the manual is next revised.
Problem
Unit appears to Make sure your power supply or battery is
be completely dead
§
turned on (no display, applicable
§
Examine power cable for shorts or opens
no audio)
§
Verify control board is plugged in and that
its connectors are fully seated
Check for 12VDC at the power jack
Make sure speaker, battery, and other
backwards
§
Measure the +5V and +8V regulated power
supplies. If either is incorrect, check the
§
§
005 No display, but
front panel connector is properly mated with
the RF board
Troubleshooting Steps