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PROBLEM: A segment or two is out on one or both displays, or odd
numbers are displayed.
SOLUTION: These problems most often occur right behind the displays,
where solder bridges and cold solder joints form. Don't worry; even some
experienced solderers still have trouble with these.
PROBLEM: Decimal point is always on.
SOLUTION: Either there is something wrong with your keying detection
circuit or you have a resistive load plugged into the mike in jack, such as the
speaker in the wrong jack or a regular mike plugged into the jack. If you want
to use your own regular mike, connect a .1uF ceramic capacitor in line with
the mike. This blocks the DC path through the mike but allows audio to pass.
PROBLEM: One or more switches won't work, but everything else is OK.
SOLUTION: Check the junction between your main board and the display
board. Many problems can arise here.
USING YOUR CB-1 VOICE RECORDER KIT:
Once the kit is assembled and tested, it's very simple to use:
To select a mode: Press the mode switch repeatedly until the display reads
the mode you want.
To select an address: Press the address switch repeatedly until the display
reads the appropriate address.
To record a message: Select mode six, then select any one of the five
addresses. Press the play button and talk into the mike. Release the play
button when you are finished recording.
To playback a message: Select any of the modes 1-5 and any previously
recorded address, and press the play button. The voice recorder will then
play a message according to which mode is selected.
CB-1 • 18
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