Vectronics VEC-1016K, Руководство пользователя

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[ ] Compare parts locations against the parts-placement diagram. Was each part
installed where it is supposed to be? Was the correct value used? Start at one side of the
board and work your way across in an organized pattern.
[ ] Inspect the solder side of the board for cold-solder joins and solder bridges between
tracks or pads. Use a magnifying glass to obtain a clear view of the track area. If you
suspect a solder bridge, hold the board in front of a bright light for a better view. All
joints should be smooth and shiny, indicating good solder wetting and flow. Resolder
any beaded or dull-appearing connections.
[ ] Finally, check all electrolytic capacitors and diodes for correct polarity. Does the
plus (+) polarity symbol on the part agree with the pictorial and with the silk-screen
pattern on the PC board? Is the banded end of each diode positioned correctly? Also,
were your ICs installed so the dot or notch on the plastic case corresponds with the white
dot or marking on the PC board? Was Q1 installed correctly?
Be sure to correct all errors before moving on. If a careful inspection revealed that
everything is A-OK, you're now ready for the moment of truth!
Initial Checkout:
To check out your kit you'll need a 9-volt flat-pack type alkaline battery and a 8-ohm
extension speaker (or monaural headphones) outfitted with a 3.5-mm mini plug. Make
sure the radio's power switch is
OFF (button out) before loading the battery. Plug in
speaker or phones and turn all potentiometer controls fully counter-clockwise.
[ ] Apply power (button in).
[ ] Turn up
VOLUME (right-hand pot) clockwise. You should hear a rushing sound,
indicating the receiver and audio amplifier are functioning properly.
[ ] Slowly advance the
SQUELCH (center pot) clockwise. The rushing sound should
stop abruptly around mid-range, indicating the squelch circuit is working.
If your radio passed its turn-on test, congratulations! You're well on your way to success,
and ready for pre-alignment.
If your radio
didn't pass the turn-on test, don't despair. Odds are, you've overlooked
something minor that's easy to correct. Take a break, come back fresh, and carefully
repeat the QC inspection. If no undiscovered errors turn up during your second
inspection, proceed to the "In Case of Difficulty" section of this manual for
troubleshooting advice.