High Voltage Power Supply Alignment Procedure - EDL Displays 6120 Operation And Maintenance Manual

procedure carefully.
5. Remove the top metal shield.
6. Connect chassis to earth ground.
7. Attach one end of a 12-15 inch clip lead to the metal shaft of a screwdriver which
has a well insulated handle. (Do not use wooden handle screwdrivers.)
8. Connect the other end of the clip lead to the metal chassis of the monitor such that
the tip of the screwdriver can reach the HV anode lead on the CRT.
9. While holding only the insulated handle of the grounded screwdriver, carefully slide
the tip of the metal blade under the rubber cover of the CRT anode lead and make
contact with the metal electrode for at least five seconds. Repeat if necessary until
arcing no longer occurs.
10. Remove the anode connection from the CRT.
11. Disconnect the focus lead.
12. Disconnect the HVPS power input connector at the HVPS.
13. Remove the four 6-32 nuts and washers on the mounting studs of the HVPS and
remove the supply. (Model 6119 only)
13a Remove the four 6 x 32 x 3/8 FH screws. Remove HVPS assembly. Remove the
four #6 locknuts and four #6 flat washers. Separate Power Supply Bracket from
HVPS. (Models 6115 & 6116)
14. Install the new supply using the four washers and 6-32 nuts and tighten securely.
14a Repeat step #13 in reverse order. (Models 6115 & 6116)
15. Connect the power input lead, focus lead, and the CRT anode connector. Make
sure the anode lead rubber boot is securely in place and not damaged.
16. Check that all wiring and leads are properly dressed and that there is not conflict
with screws, covers, etc.
17. Perform High Voltage Power Supply Alignment Procedure.
18. Replace top metal shield.
19. Replace the enclosure.
20. Connect all BNC signal cables and the a.c. power cable to the monitor.
21. Apply a.c. input power and input signals and check display for proper operation.

HIGH VOLTAGE POWER SUPPLY ALIGNMENT PROCEDURE

6115 - 6120 Operation and Maintenance Manual ©EDL Displays, Inc. January 1997
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