Eliminating The LPSU Opto-Isolator Board

Preface: This articles covers different versions of the Opto-Isolator board and how those versions were wired. In order to be able to bypass you Opto-Isolator board you need to know which version you have and how it was wired at the Ruida controller. The wire colors changed so it is very important to identify what setup you have.

Here is an overview video. Please watch it in its entirety and look carefully at the documentation below before performing the test

Things you will need:

-Small Flathead Screw Driver

-Paperclip or small jumper Wire

-To locate your Ruida Controller

-To Locate your Laser Power Supply Unit (LPSU)

-Access to the Back of the machine for Nova 35, Nova 51 and Nova 63 for the LPSU

-Access to the Right side of all Nova Machines

-Access to the Left side of the machine for the Nova 24

NOTE: always disconnect main power before attempting repairs and take good pictures before you start removing anything. Double check your wiring before powering back up

Interactive Step By Step Guide:

Procedure to Bypass the Opto-Isolator:

1.  Power off the machine and unplug it from the wall
   
2. Determine which Opto Isolator you have from the options down below
   
3. Unplug the Opto-Isolator from the LPSU
   
4. Take a picture of your Opto-Isolator Wiring
   
5. With the flat head screw driver, Loosen all the terminals with wires on them and remove the wires from the terminals
   
6. With the flat head screw driver, Loosen all the terminals on the left side of the Opto-Isolator to remove the 6 pin green plug off the Opto-Isolator
   
7. Rewire the wires to the 6 pin green plug that was removed from the Opto-Isolator based on the options shown down below
   
8. Plug the green 6 pin to the LPSU and run a job or another diagnostic and report the results to support@thunderlaserusa.com
   

Five Wire Opto-Isolator Board Versions:

  If your board is an older 4 Wire version, see the section down below for the Bypass Wiring.

The 5 wire Opto-isolator board comes in 2 versions as noted on the Opto Isolator itself.

Rev2.1 is for MYJG series

Rev2.2 is for HY series

(note the the color of the board does not indicate version)

Current Version Opto-Isolater Bypass For Nova 35, Nova 51 and Nova 63 with MYJG power supply:

We need to check the wiring on your Ruida controller CN5 connector to check your wire colors. Older machines had a Brown wire on Cn5 Pin3, newer machines (around 2020 an newer) have a Grey wire on Cn5 Pine 3.

Check your Controller CN5 Connector to determine which way to wire your opto board for your MYJG power supply

Option 1:

CN5 Pin3: LPWM1 = Brown

Option 2:

CN5 Pin 3: LPWM1 = Grey

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Opto-Isolator Wiring Changes to Bypass:

Take note of the factory wiring of the Opto-Isolator:

(Option 2 Shown)

Option 1 Opto-Isolator Removed and Bypassed Wiring Example:

Option 1 wire mapping from Terminal to Terminal:

Option 2 Opto Isolator Removed and Bypassed Wiring Example:

Much Older option for Nova 35, Nova 51 and Nova 63 with MYJG and 4 Wire Opto-isolator:

This is a much older version with a completely different looking Opto-Isolator.

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Opto Isolator Wiring Schematic for Refernce :

Option 1 Schematic:

.

Option 2 Schematic:

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Opto-Isolator Wiring and Bypass for Nova 24 HY-T60 Power Supply:

Power supply will look like this and is located on the left side of your Nova 24:

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Opto-Isolator Wiring and Bypass for HY-DY Series Laser Power Supply:

One the Left the Opto is installed, on the right it is bypassed.

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