Table of Contents
Advertisement
Model 5501A
Maintenance
4-13.
Remove the A6 PZT Power Supply Assembly according to the following procedure:
THE FOLLOWING PROCEDURE REQUIRES THE REMOVAL O F
H l G H VOLTAGE POWER CONNECTIONS F R O M THE LASER
TUBE. IT IS POSSIBLE FOR SOME VOLTAGE POTENTIAL T O
REMAIN O N THESE CONNECTIONS, A N D IF THE POTENTIAL I S
N O T DISCHARGED ACCORDING T O THE FOLLOWING
PROCEDURE, INJURY T O SERVICE PERSONNEL C A N RESULT.
a.
Remove the A1 Connector Board Assembly a s previously described in this section of the manual.
b. Disconnect the PZT anode connection from the rear of the laser tube. DO NOTTOUCH THE METAL
TIP OF THE CONNECTOR.
c.
Momentarily place the metal connector tip to a suitable power supply return point such a s the cast
base plate on which the laser tube is mounted. This will remove the possibility of a shock hazard
from the anode lead.
d. Remove the three recessed machine screws (from the top) that secure the PZT power supply to the
cast base plate, and remove the power supply from the unit.
4-14. Remove the A2 High Voltage Power Supply Assembly according to the following procedure:
THE FOLLOWING PROCEDURE REQUIRES THE REMOVAL O F
H l G H VOLTAGE POWER CONNECTIONS F R O M THE LASER
TUBE. IT IS POSSIBLE FOR SOME VOLTAGE POTENTIAL T O
REMAIN ON THESE CONNECTIONS, A N D IF THE POTENTIAL IS
N O T DISCHARGED ACCORDING T O THE FOLLOWING
PROCEDURE, INJURY T O SERVICE PERSONNEL C A N RESULT.
a.
Remove the high voltage power supply connector from the laser tube by rotating thewhite, knurled
fastener in the counterclockwise direction; hold the wire from rotating with the fastener. DO NOT
TOUCH THE SPRING-LOADED CONTACT.
b. Momentarily place the spring-loaded high voltage contact to a suitable power supply return point
such as the cast base plate on which the laser tube is mounted.
c.
Disconnect the three remaining power supply leads from the pin connectors on the A1 Connector
Board Assembly.
d. Using a suitable allen wrench, loosen the three screws on each forward side of the cast base plate.
These screws secure the U-shaped, sheet-metal sub-panel in a retaining groove at the front of the
cast base plate.
e. Carefully lift and rotate the U-shaped sub-panel (with circuit board assemblies attached) until it can
be gently rested on top of the laser tube.
f.
Remove the two recessed machine screws (from the top) that attach the high voltage power supply
to the cast base plate.
g.
Remove the encapsulated power supply module from the unit.
4-15.
TROUBLESHOOTING
4-16.
If the 5501A fails any part of the performance check or an operational failure occurs, use the
Troubleshooting Flow Chart (Figure 4-1) to isolate the failure to the faulty module. Further fault isolation to
the component level may then be accomplished by referring to the functional diagram of Figure7-4and the
accompanying theory in Section Ill. In theTroubleshooting Flow Chart (Figure4-l),adjustment procedures
are referenced when required. The module location and schematic diagrams (in Section VII of this manual)
are also provided to help the troubleshooter.
Advertisement
Table of Contents
