User's Manual

ADCP-75-130 • Issue 3C • August 2006

Page 61

DETAIL DRAWING

OF TYPE A AND TYPE B

MODULAR OPTICAL

TRANSCEIVERS

TYPE A

TRANSCEIVER

TYPE B

TRANSCEIVER

RELEASE

LEVER

RELEASE TAB

17280-A

Figure 33. DHU or DEU Optical Transceiver Installation

9. Insert the optical transceiver into the socket until it locks into place.

10. Clean the optical fiber connectors and reconnect to the optical transceiver.

11. Place the PORT ON/OFF switch for the optical transceiver that was replaced in the ON

position (press I).

Note: If the DEU was turned off to replace the HOST PORT optical transceiver, place the

DEU AC power On/Off switch in the ON position (press I) and inform the NOC or alarm

monitoring system operator that the alarm has been cleared.

12. Verify that the DHU or DEU optical port LED indicators shown normal optical port

operation (refer to Table 7 or 8).

6.7 DRU Modular Optical Transceiver Replacement Procedure

The modular optical transceiver should be replaced when testing indicates that the transceiver

has failed. Use the following procedure to replace an optical transceiver in a DRU:

Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser

radiation can seriously damage the retina of the eye. Do not look into the ends of any optical

fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser

radiation may result. An optical power meter should be used to verify active fibers. A

protective cap or hood MUST be immediately placed over any radiating transceiver or optical

fiber connector to avoid the potential of dangerous amounts of radiation exposure. This

practice also prevents dirt particles from entering the transceiver or connector.

1. Put on the IR filtering safety glasses.

2. Slip on an Electro-Static Discharge (ESD) wrist strap and connect the ground wire to an

earth ground source. Wear the ESD wrist strap while completing the optical transceiver

replacement procedure.

Warning: Electronic components can be damaged by static electrical discharge. To prevent

ESD damage, always wear an ESD wrist strap when handling electronic components.