Initial Testing And Operation - Ramsey Electronics BS1 Instruction Manual

The bullshooter endless loop voice recorder

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Table Of Contents

Table of Contents

installed by reheating each solder pad while holding the cartridge in place.

Once installed, you may want to touch-up each joint with a bit more solder

to ensure a solid connection.

59. Check once again to be sure that the two leads do not touch the outer

chrome case of the MIC1 and also that the case does not contact the circuit

board. A short in this area will prevent the Microphone input from working.

60. Install R12, 10K ohm potentiometer (marked 10K). Solder all five points.

If everything looks good, it's time to install the three remaining parts.

61. Carefully insert the voice recorder IC U2 into the socket, taking care

that ALL 28 pins get into their proper holes. The orientation of the notched

end, as shown on the Parts Layout Diagram is critically important.

62. Install the microprocessor U4 into the socket. This is the 16 pin IC with

the sticker. Once again, check for proper orientation of the notched end.

Double check all pins to make sure none are bent under. A little time spent

here can save a lot of grief later!

63. You should still have one 10K ohm

resistor left. This is to be soldered on the

bottom side of the PC board, from pin 23 of

U2 to the positive side of C2. Follow the

diagram for correct placement.

That's it! All components should be installed.

Before applying power it would be a good idea

for one last glance over the entire pc board.

Check for:

•

Missed solder joints.

•

Solder shorts between components. Check your schematic and parts layout

diagrams if you suspect a fault.

•

Proper orientation of diodes, capacitors, and ICs.

•

Ensure proper power supply polarity and voltage. (12 volts DC, center tip

positive)