Vectronics VEC-1292K - Manual (Page 17)

VEC-1292K Owner’s Manual Stereo Transmitter Kit
17
IN CASE OF DIFFICULTY
Before seeking outside assistance, check below for a possible solution:
Does not turn on: Check battery condition, snap clip, and power leads. Also,
make sure lead polarity is correct (red to +, black to GND). Make sure power
switch is "on".
Drifts off Frequency: Check battery condition. Also, check to see if the unit is
exposed to direct sunlight--or near heating/cooling source such as a radiator or
air conditioner.
High audio level, distortion: Check gain settings and output rating of audio
source. Transmitter may be over-modulated.
Low audio level: Check gain settings and output rating of audio source.
Transmitter may be under-modulated. Note that "microphone level" signals
aren't sufficiently powerful to modulate the transmitter.
Operation off frequency: Unit may have been bumped or jolted causing
movement to the tuning slug in L3. Readjust.
Weak signal: Check condition and extension of antenna. Re-tune C12 if
needed.
No Stereo: Check your program source--is it in stereo? Also, confirm your
receiver is indicating stereo signal "lock-up". Transmitter (or receiver) may
have drifted off frequency causing the stereo detector to unlock.
If this check fails to uncover the problem, repeat the "QC" check one more time.
Service records show that, for most malfunctioning kits, outright component
failure is relatively rare. In most cases, the culprit is a misplaced part, reverse-
polarized capacitor, improperly installed IC, or a faulty solder connection. If,
despite your best effort, you cannot solve the problem, kit repair services are
available through Vectronics. See the warranty on the inside front cover for
complete instructions.