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MAINTENANCE, ADJUSTMENTS AND
FAULT ISOLATION/TROUBLE SHOOTING
Most problems in the Model 6115, 6116, 6119, & 6120 video monitors can be isolated to a
single module or pair of modules by careful observation and interpretation of the display
presentation, the LEDs on the rear panel and various mechanical items. Generally, most
problems are manifested by either a display presentation which is incorrect or no display at
all. By referring to a troubleshooting flow diagram an experienced technician should be able
to make an effective repair. The following procedure assumes that there is only one problem
and not a situation compounded by multiple faults.
PROCEDURE:
1.
Observe the display presentation and the fault indicators located on the
Microprocessor Board.
2.
Verify that all rear panel signal input coaxial BNC and a.c power connections are
correct and secure.
3.
Verify that all front controls (Power, Brightness, Contrast/Calibrate, DeGauss/Mode)
mechanically function properly and approximate their normal operating conditions.
4.
Verify proper calibration before troubleshooting.
5.
Using the observations in step 1, consult the troubleshooting flow diagram (FIG. 7)
to isolate the problem to a module or modules.
6.
Remove power from unit.
7.
Replace the appropriate module or modules following the procedures given below
for each module. As a precaution both the monitor and the maintenance person
should be grounded during any module replacement.
MAINTAINABILITY
All circuitry within the monitor is contained in functional replaceable modules such as
deflection output, control, video amplifiers (3) and power supplies.
described in this section is limited to on-line corrective maintenance requiring no special tools
or test equipment. This maintenance will consist of isolating the fault to a particular module or
pair of modules and then replacement of the defective module. Generally no calibration will
be required after replacement of a defective module unless the Logic Control Board is
replaced.
REPLACEABLE ITEMS
6115 - 6120 Operation and Maintenance Manual
TROUBLESHOOTING
26
The maintenance
©EDL Displays, Inc. January 1997
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Table of Contents
Troubleshooting
