Anode And G2 Voltage Adjustment Procedure - EDL Displays 6120 Operation And Maintenance Manual

ANODE AND G2 VOLTAGE ADJUSTMENT PROCEDURE

EQUIPMENT REQUIRED:
1. Astro Designs VG809 or equivalent and cables.
2. FLUKE Model 27 Multimeter with FLUKE 80K-40/1000 MegOhm High Voltage
Probe or equivalent.
3. 1/8 inch insulated flat point adjustment tool
PROCEDURE:
1. This procedure requires removal of unit enclosure or top cover.
2. Connect three equal length BNC cables from the video generator or test source
RGB analog outputs to the Model 6119 RGB video inputs respectively.
3. Display a color bar or gray scale pattern if possible.
4. Connect the voltmeter negative lead to the monitor chassis. CAREFULLY slip the
High Voltage Probe tip under the rubber insulator cap at the CRT anode connector.
5. If necessary, insert the adjustment tool in the small hole on the top of the High
Voltage Power Supply near the power connector and adjust for a reading of 25
Volts (25,000 Volts Actual) on the multimeter.
6. To adjust the G2 voltage CAREFULLY insert the tip of the High Voltage Probe
pin 9 of the High Voltage Power Supply power connector. Caution: Ordinary
voltmeter probes will result in inaccurate readings due to their loading.
7. If necessary adjust the G2 potentiometer for a reading of +0.45 Volts (450 Volts
Actual) on the multimeter.
8. After adjusting anode voltage it will be necessary to adjust focus voltage.
6115 - 6120 Operation and Maintenance Manual
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©EDL Displays, Inc. January 1997
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