Siemens simatic hmi op27 Equipment Manual page 186

OP27, OP37 Equipment Manual
Release 05/99
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Step
1 Open the OP37, as described in Section 19.4.1, and study the safety notes
contained in that section.
2 Undo the four screws
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¸ ¸
·
3 Remove the covers
4 Remove the two connectors
Carefully remove the tubes at the two rubber-buffered ends from the hold-
5
ers.
Caution
If you hold the glass to remove a tube, the tube may burst
!
with a corresponding a risk of injury.
6 Insert the new tubes, as described, in the holders and reassemble the
device.
Maintenance/Upkeep
Action
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.
·
·
(see figure in Step 2).
¸
(see figure in Step 2).
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19-13