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6.2
Replacing the Back-Lighting
Overview
The back-lighting tubes are mounted at the rear of the display and are con-
cealed by the tilting PC box.
The difference in brightness between a new and an old CCFL backlighting tube
is clearly noticeable on the display. For that reason, if one tube has failed you
should replace the other one at the same time. This will also save you the trou-
ble of opening up the unit again within a short time when the second tube fails.
To replace the tubes, proceed as follows:
1. Remove the outer rear panel.
2. Fold out the PC box.
3. Remove the tube covers.
4. Change the tubes and attach the tube covers.
5. Close the OP and affix the outer rear panel.
Warning
!
Liquid crystal can leak out of a damaged display.
It is absolutely essential to avoid skin contact with the fluid and inhaling the
vapor. If you should inadvertently come into contact with the liquid crystal,
clean the skin immediately with alcohol.
Consult a doctor immediately!
Caution
!
The backlighting uses voltages > 1000 V. Make sure that the OP is discon-
nected from the power supply.
OP37/Pro Equipment Manual
Release 7/98
Servicing/Maintenance
6-3
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