Optical Fiber (LWL) - MOST Bus/Removing and Installing Optical Contacts

Removing And Installing Optical Contacts
Remove the PCM.

Disconnecting the plug connection on the PCM:







Disconnecting the plug connection on the CD changer:







Unplugging the control unit plug connection for the telephone:







Removing and installing optical contacts on connector side







1. Open the secondary locking with the press-out tool. Insert the tool in the opening provided and lift the locking. The locking engages in the upper position.
2. Place the tool on the primary locking and lift the locking.







- "A" Optical contact, grey
- "B" Optical contact, black

3. Pull LWL, e.g., "B" carefully in the "direction of the arrow". If it is not possible to pull out the LWL, check again if the secondary locking is completely released and if the primary locking is raised sufficiently.

Visual inspection of lockings, connector housing, and contacts for possible damage and if necessary, exchange the damaged parts.

Installing optical contacts on connector side
- Remove the dust boot right before plugging.
- Check the proper condition of the contact.







1. Insert the optical contact "B" in the connector until it engages audibly.
- "A" Optical contact, grey
- "B" Optical contact, black







2. Lock the secondary locking "arrow" and check the optical contacts for tightness.

Removing and installing optical contacts on socket side







1. Release the spring cap on both sides and remove using the press-out tool.
2. Remove LWL module from the connector.
3. Place the tool for releasing the contact locking of the LWL module and lift the locking.







- "A" Optical contact, grey
- "B" Optical contact, black

4. Pull LWL, e.g., "B" carefully in the "direction of the arrow". If it is not possible to pull out the LWL, check again if the locking is completely released.

Visual inspection of lockings, connector housing, and contacts for possible damage and if necessary, exchange the damaged parts.

Installing optical contacts on socket side
- Remove the dust boot right before plugging.
- Check the proper condition of the contact.
- At a force of 10 Nm (7.5 ftlb.) the springs installed in the joint will be pressed together. This leads to an increase in attenuation, which could lead to system impairment and system failure. Therefore, a maximum of 10 Nm (7.5 ftlb.) can be used to pull the LWL from the joint.







1. Insert optical contact "B" in the module until it perceptibly engages, then check the optical contact is securely fitted.
2. Insert the module in the joint on the socket side.
3. Slide the spring cap on the joint until it perceptibly engages "arrow".