❒125. Install J6, a 3.5mm mono microphone jack. (Identified by only three mounting pins instead of five) Note that they don’t fit exactly in the holes since a better jack was ordered that the one the kit was originally designed for.
❒126. Install J5, a 3.5mm mono microphone jack.
We have just completed this entire side of the PC board and now we are ready to begin working on the other side of the board. Flip the board over and notice where all of the controls are to go. Notice that the pins on the slider pots are arranged so that the sliders can only be installed in one direction. Again we will start with the lower and smaller components and then work our way up.
The next few steps concerning the installation of the LEDs for the meters and the microphone in indicators are a little different than usual. Instead of installing one part at a time, we will be installing in groups. This will make for easier installation.
❒127. For height reference we want to install S4, a DPDT board mount slide switch. Make sure and mount the part flush and level to the board.
❒128. Install S3, another DPDT board mount slide switch. Again make sure it is mounted flush to the PC board.
Notice how the LEDs for the bargraph are laid out in groups of color. We have two rows of three green LEDs on the left, two rows of four yellow ones in the middle, and two rows of red on the right. When the LEDs are installed, the top of the LED should be at the same height as the surface of the switch plate (not the switch handle).
❒129. We will begin by installing just the left most green LEDs to get a good height reference for the rest of the LEDs (D4 and D18). Notice how one lead of the LEDs are longer than the other. This longer lead indicates the anode side of the LED. The anode side of all the LEDs in the meter face away from the switches we have just installed. They are represented by the triangle in the circuit board layout, not the line end of the LEDs. To help you level the LEDs, there is an aluminum spacer included to place under the LEDs while mounting them. Use the spacer between the leads of the LEDs, then remove it once the LEDs are all installed.
❒130. Install the next two green LEDs. (D7 and D20) Make sure you install them with the long leads facing away from the switches.
❒131. Install the last of the green LEDs (D9 and D21). Again check for where the long leads go.
❒132. Install the first two yellow LEDs just to the right of the last green ones. (D10 and D22). Make sure the long leads are facing away from S3