OLA5 Troubleshooting

Last modified: 2026-08-27

Table of Contents
  1. No Signal
  2. Not Compressing

No Signal

If your OLA5 is not passing a signal, please check the following:

  1. Signal path: check your interface by patching a cable in place of the OLA5
  2. 500-series rack: if possible, test another module in the same slot the OLA5 was in, and try the OLA5 in a different slot
  3. OLA5 output stage: make sure the jumpers on CON1 (Modern/Vintage output select) are oriented as shown below

Not Compressing

If your OLA5 is passing a signal but not compressing, check the following:

  1. Q1 orientation: the side with text should be facing the bottom of the PCB (toward OPT1)
  2. LED3 and LED4 orientation: remove the LDR assemblies from OPT1 and OPT2 and check the LEDs underneath. The flatted side of the LEDs should correspond to the flat side on the silk screen.