Ramsey Electronics BS1, Инструкция по эксплуатации

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BS-1
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To playback a message into a speaker:
1. Connect a speaker to the “Speaker Out” jack J4.
2. Power up the BS1.
3. Push the “Play” button S3. (The “Play” LED will illuminate.)
To play a message into auxiliary equipment:
1. Connect the “Line Out” jacks J1 and J3 to the Line Level inputs on the de-
sired equipment.
2. Power up the BS1.
3. Push the “Play” button S3. (The “Play” LED will illuminate.)
TROUBLESHOOTING
Won’t record from Microphone and/or Line In.
1. Check for proper positioning of jumper block on J2.
2. Check for proper adjustment of R2 if recording from Line In.
The LEDs work, but nothing else happens.
1. Make sure U2 is properly seated.
2. Check for 2 volts DC on U2 pins 18 & 27. U2 runs off a separate power
source through diodes D1, D2, and D3.
Misc. faults or problems.
1. Check for proper voltage and polarity from the power source. Center tip of
power plug should be positive.
2. Check for proper DC voltages on the circuit board. ( +2, +5, +12)
3. Loose or cold solder joints, solder splashes, etc. A good solder joint is clean
and shiny. As a rule, if you need a magnifying glass to check for a good
contact, resolder it. Check your work against the schematic and parts layout
diagrams in cases of questionable solder shorts or opens.
4. Check for proper orientation and placement of ICs, and that all pins are sol-
dered (or fully seated if in a socket).