Other Maintenance Work On Op27 - Siemens simatic hmi op27 Equipment Manual

Maintenance/Upkeep
19.3

Other Maintenance Work on OP27

Other maintenance work is necessary only if the back-lighting fails:
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Service life The service life of the fluorescent tubes can be increased by blanking the
screen (refer to Section 11.2).
Before replacing
The unit must be opened up in order to replace the display and back–lighting.
Observe the following notes on safety for opening the OP:
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19-4
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In the case of the OP27M, the monochrome display needs to be replaced.
In the case of the OP27C, only a CCFL tube has to be replaced.
Warning
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Repairs to the OP must be performed by suitably qualified and authorized
technical personnel.
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The user may be exposed to considerable risk as a result of unauthorized
opening of the OP and unqualified repairs.
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The display back-lighting operates at voltages > 1000 V. Make sure that
the OP27 is disconnected from the power supply before the unit is opened.
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Crystal liquid may leak from a damaged display.
Do not allow liquid to touch your skin; do not inhale vapors. If you come
into contact with crystal liquid, wash your skin immediately with alcohol.
Consult a doctor without delay.
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Before working on an open unit, observe the ESD guidelines in the
Appendix F of this manual.
Caution
One of the screws in the back panel of the device is sealed. The warranty for
your device ceases if the seal is broken. If the manufacturer's warranty for
your device has not expired, you should have the back-lighting or display
replaced by your local Siemens branch office.
OP27, OP37 Equipment Manual
Release 05/99