Cooper Lighting 84700 Manuale Utente

9131 

Rev. M 

 
4.2 

CORRECTIVE MAINTENANCE CONT'D 

 

VOLTAGES IN EXCESS OF 1000 VOLTS ARE PRESENT WHEN THE 
REGULATOR IS OPERATING.  DO NOT ATTEMPT REPAIR OR 
SERVICING WITHOUT FIRST REMOVING POWER FROM THE 
REGULATOR.  THE USE OF LOCK-OUT DEVICES IS RECOMMENDED 
FOR INSTALLATIONS WHERE THE POWER DISTRIBUTION PANEL IS 
NOT READILY VISIBLE FROM THE REGULATOR OR CSC LOCATION. 
 
Caution should be exercised if removal of Circuit Card Assembly becomes necessary 
as the board is easily damaged by improper removal and handling, either of which 
would void the warranty.  Particular areas of concern are: 
 
(A) 

Power must be removed from the CSC before attempting to 
disconnect or re-connect the connector plugs from the board. 

 
(B) 

The circuit card is held in place by five screws and by washer and nuts 
on switch actuators.  All screws, nuts and washers  must be replaced 
after the circuit card has been re-installed and before plugs are re-
connected to the board.  Failure to do so will probably result in 
permanent or intermittent circuit board damage. 

 

4.3 

TROUBLESHOOTING CHART 

 

The following Troubleshooting Procedure, Table 4-2, is provided as a guideline to 
assist qualified airport maintenance personnel in locating and correcting any 
malfunctions when they occur.  See Figure 4-1, CSC Schematic, for reference during 
troubleshooting. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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