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ARP Odyssey & Avatar LED Slider

Installation Manual

Introduction

Thank you for purchasing an LED slider upgrade kit for your ARP synthesizer.

These sliders not only look great, but they feel beer than the original ARP

CTS sliders. This installation guide will show you how to install the slider

kit and the 5 volt power supply. For best results, this kit should only be

installed by qualified technicians. If you are unfamiliar with electronics,

please seek out the skills of a qualified technician who can install this kit.

The installation should take between 4 and 8 hours in most cases. Take your

time, and always check twice before drilling or soldering.

Kit Contents

• 5V 1.4A LED Ballast (1)

• LED Adapter PCBs - Standard Type (36 Avatar, 33 Odyssey)

• LED Adapter PCBs - Blinking Type (1)

• Sho Jumper Cables

• Med Length Jumper Cables

• Long Jumper Cables

• Nuts (2)

• Bolts (2)

• Length of Red, Black, and Orange Wire

• Heat Shrink Tubing

• Female Connector Cable (3)

• Male Connector Cable (3)

• LEDs (37 Avatar, 34 Odyssey)

• LED Ballast Drill Tempate

• Phillips Head Screwdriver

• Solder

• Center Punch or Marker

• Drill

• Soldering Iron

• Wire Strippers

• Desoldering Tool (Such as Hakko 808 or Similar)

Tools Required For Installation

1) Remove all slider caps from the ARP, then remove all PCBs from chassis.

Desolder all old CTS sliders and remove them from the boards. Always be

sure not to damage PCB traces when doing this.

When all sliders have been removed, clean the PCBs of dust and flux.

Installation of Sliders

Figure 1 - Test Fiing all Sliders (ARP Omni 2 shown)

2) Using the PCB pas diagrams in Drawing 1,2, and 3, place all of the slid-

er assemblies into the PCB as shown in figure 1. DO NOT SOLDER YET. This

allows for the chance to test fit the assemblies, and also makes it easier to

wire the sliders together. Be sure to use the slider adapter with the transis-

tor driver for the LFO RATE slider. This slider adapter allows the LFO to mod-

ulate the brightness of that slider’s LED.

3) Double check the slider values and tapers. Using the jumper cables in-

cluded with the sliders, begin wiring the slider assemblies as shown in fig-

ures XX-XX. Be sure to wire all V+ pins together, and all GND pins together. It

is easy to make a mistake and reverse the polarities when using the longer

cables. Be sure to double check your work before you solder.

Figure 2 - Slider Wiring Assembly Completed. (Sliders still just loosely placed into PCB. ARP Omni 2 shown)

Build wire assemblies. When completed, the assemblies should still be

placed loosely into the PCB, as shown in Figure 2.

4) Using elastic bands, clips or other means, hold the sliders into place so

the PCB can be flipped over for soldering. Don’t worry if the sliders are

straight. They will all be aligned and straightened when the assembly is tack

soldered into place. THE SLIDERS MUST BE TACK SOLDERED INTO PLACE BY

ONLY ONE PIN. This will allow the slider assemblies to be held in place on

each PCB while each slider is leveled and aligned.

Figure 3 - Sliders Assembly Tack Soldered (Each slider soldered in place by only one pin)

Now that the slider asseblies are held in place, heat up the tack

solder joint holding each slider into place and adjust so that slider

shas are perpendicular to the pcb and the slider PCB is parallel with

the ARP PCB. Notice that the sliders can easily be moved into align-

ment by gently moiving them or heating up the tack solder joint.

Don’t hold the soldering iron tip to the tack solder joint for more than

2-4 seconds. Too much heat can cause the slider adapter PCB pins to

become unsoldered.

You can now test fit the PCB to the chassis. When you have fit the

PCB back into the chassis of the synth, screw the PCB into place. Ad-

just any sliders that arent straight, then solder each sliders remaining

pins int the PCB. When the PCBs are screwed into the chassis, you

can gently hold the slider into the desired position and solder the

remaining legs.

Figure 4 - Slider Assemblies Wired Into PCBs (All sliders aligned. ARP OMNI 2 shown)

5) When the assemblies have been wired to the PCBs, you can connect

each PCB to the LED power supply using the mating connectors. This

allows for brightness adjustment of each LED. Note that the LFO RATE

slider won’t be lit. This LED will only light if the LFO on the ARP is running.

In this case, we will only be running the LED circuit on the sliders. This

step can be done aer you have wired the 5V LED supply into place.

Using a preferably non conductive jewelers screw driver, adjust the LED

brightness for each slider. If using custom colors, be sure to cut the legs

of the enclosed LEDs to the same length as the legs of the LEDs that

came mounted in the sliders. If the LED is put into the slider backwards,

that LED will not light. Reverse LED polarity if this happens.

Figure 5 - Slider Assembly Powered. (LED brightness being adjusted on each slider)

Figure 6 - ARP Odyssey 2800 Board A Installed

Figure 7 - ARP Odyssey 2800 Board B Installed (Note that this wiring is diﬀerent from the suggested method as shown in PCB drawings below)

Figure 8 - ARP Odyssey 2800 Board C Sliders Installed