---
title: ODME- Zener Barrier PCB replacement procedure
description: How to remove and replace the Zener Barrier PCB
---

[Skip to content](https://hub.rivertrace.com/knowledge/odme-zener-barrier-pcb-replacement-procedure#main-content)

English

Show submenu for translations

[Submit a request](https://hub.rivertrace.com/knowledge/kb-tickets/new)

[![Rivertrace-Logo-Blue-on-White](https://hub.rivertrace.com/hs-fs/hubfs/Rivertrace%20Logos/Rivertrace-Logo-Blue-on-White.jpg?width=412&height=150&name=Rivertrace-Logo-Blue-on-White.jpg)](https://www.rivertrace.com)

Open main navigation

Close main navigation

- English
  
  Show submenu for translations
- [Submit a request](https://hub.rivertrace.com/knowledge/kb-tickets/new)
- [Cant find what you need? Contact our remote support team.](mailto:remotesupport@rivertrace.com)

[Cant find what you need? Contact our remote support team.](mailto:remotesupport@rivertrace.com)

 How can we help you?

- There are no suggestions because the search field is empty.

1. [Knowledge Base](https://hub.rivertrace.com/knowledge)
2. [Smart ODME](https://hub.rivertrace.com/knowledge/smart-odme)

# ODME- Zener Barrier PCB replacement procedure

## How to remove and replace the Zener Barrier PCB

#### Tools Required

> 7mm socket for M4 nuts 
> 
> Small flat blade screw driver

#### Instruction 

There are 10 wires connected to the terminals on the right hand side of the PCB. you will need to   
mark each wire with the terminal number that it is inserted into. (TP1 – TP10) 

1. Isolate the power to the Zener Barrier Solenoid Module and wait for the LEDs to extinguish before starting any work. 

Anti-static precautions should be adhered to when handling the PCB

2. Taking care to record which wire is removed from which terminal, remove all 10 wires from the terminals on the right hand side of the PCB, . 

![](https://hub.rivertrace.com/hs-fs/hubfs/image-png-Feb-20-2025-12-10-45-9905-PM.png?width=688&height=388&name=image-png-Feb-20-2025-12-10-45-9905-PM.png)

3.Remove the ribbon cable connector from the socket on the left hand side of the PCB. 

![](https://hub.rivertrace.com/hs-fs/hubfs/image-png-Feb-20-2025-12-15-31-8350-PM.png?width=646&height=441&name=image-png-Feb-20-2025-12-15-31-8350-PM.png)

4. Use the 7mm socket to remove the 5 x M4 nuts.

![](https://hub.rivertrace.com/hs-fs/hubfs/image-png-Feb-20-2025-12-26-58-7110-PM.png?width=688&height=520&name=image-png-Feb-20-2025-12-26-58-7110-PM.png)

5. Remove the PCB

 

> **New PCB installation**

1. Refit the new PCB in reverse order to removal of the old PCB.

2. De-isolate the power to the Zener Barrier/Solenoid Module.

3. Retest the system. 

 

 

- [Smart ODME](https://hub.rivertrace.com/knowledge/smart-odme)
- [SmartBilge](https://hub.rivertrace.com/knowledge/smartbilge)
- [Smart Bilge+ Plus](https://hub.rivertrace.com/knowledge/smart-bilge-plus)
- [Smart PFM](https://hub.rivertrace.com/knowledge/smart-pfm)
- [OCD CW](https://hub.rivertrace.com/knowledge/ocd-cw)
- [Smart ESM](https://hub.rivertrace.com/knowledge/smart-esm)
- [OCD Xtra](https://hub.rivertrace.com/knowledge/ocd-xtra)
- [Smart 50M](https://hub.rivertrace.com/knowledge/smart-50m)
- [Smart Turbidity](https://hub.rivertrace.com/knowledge/smart-turbidity)
- [Sample conditions and general techniques](https://hub.rivertrace.com/knowledge/sample-conditions-and-general-techniques)
- [General FAQs](https://hub.rivertrace.com/knowledge/general-faqs)
- [Key MEPC Regulations and Rivertrace Solutions](https://hub.rivertrace.com/knowledge/key-mepc-regulations-and-rivertrace-solutions)
- [OCD CM](https://hub.rivertrace.com/knowledge/ocd-cm)

[![Rivertrace-Logo-Black](https://hub.rivertrace.com/hs-fs/hubfs/Rivertrace%20Logos/Rivertrace-Logo-Black.jpg?width=271&height=99&name=Rivertrace-Logo-Black.jpg "Rivertrace-Logo-Black")](https://www.rivertrace.com)

Rivertrace Product, Regulation and Technical Support Knowledge Base

<https://www.linkedin.com/company/22297015>

Copyright © 2025, Rivertrace Limited