DKT Comega OFA-CCD series, Руководство пользователя

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Network Managed Optical Amplifier
User’s Manual Rev 1.3
OFA-CCS/CCD Series June 2014
47
7 MAINTENANCE
7.1 Maintenance Cautions
If the Shelf type EDFA is out of order, a specialized expert must check the EDFA and the
problem.
The expert should try to resolve the problem using the technical information provided.
The expert should follow the steps below which may fix the problem or recover the
operational state.
Any other repair attempts except those explained in this chapter may cause unexpected
damage or problems to the unit or installation.
Careful treatment and caution is required for all trouble shooting procedures.
7.2 Trouble Shooting Procedures
When an operator recognizes any problem on the EDFA front panel he/she should try to
identify the type of problem.
When the problems occur the symptoms are shown below Table.
Table 10. In the cases alarm events and Alarm LEDs signs
Case
Laser
LED
Status
LED
Causes
1 Off Off - Electric power is not provided.
2 Red Red
- The optical input power of the EDFA does not meet the
minimum requirement.
3 Green Red
- The optical output power of the EDFA does not meet
the specified output power.
4
Green Yellow
- The bias current of the Pump Laser Diode of the EDFA
is abnormal.
- Case Temp is out of the specified range
- FAN fail
5
Green
to Red
Yellow
to Red
The internal temperature of the Pump Laser Diode of the
EDFA is out of the specified range.

Case 1: Check the power switch and power cord so that electric power is provided
properly.

Case 2: Measure whether the optical input power of the EDFA from the optical
source or optical transmitter satisfies the minimum optical input power condition of
the EDFA. If the optical input power of the EDFA is satisfied, clean the surface of
the optical input connector of the EDFA. Remember the earlier requirement of
clean optical connectors.

Case 3: Check the Laser ON/OFF state on the Laser Control menu.

Case 4: In this case either the capability of the Pump Laser Diode degraded or it is
out of order. The EDFA needs to be repaired or replaced.

Case 5: In this case, Status LED turns yellow at first. Then both Laser LED and
Status LED turn red. This is cause by the failure that the internal temperature of the
Pump Laser Diode is abnormal. It requires either adjustment or replacement.