System installation
27
Document no. M1137263-04
NOTE: Authorized personnel only may open the cover of 24Vdc input connector (use a flat
screwdriver).
3.3.6 Replacing PC boards
For service procedures refer to Part II.
1.
Make sure that the power of the monitor is turned off and unplug the power cord. Press
and hold the service reset button on the rear panel for at least five seconds or until an
audible tone is heard (see
).
Figure 11
Service reset button
2.
Remove all PC boards, cover plates and EMC plates on the right-hand side of the PC
board, to be replaced, then remove the board itself (two or four screws).
NOTE: The B-UPI4NET may have been installed so that it can be removed without removing the
other PC boards first.
WARNING
The circuit boards contain sensitive integrated circuits that can be
damaged by an electrostatic discharge. Careful handling of the boards is
therefore essential.
NOTE: The B-UPI4NET contains components on both sides of the PCB. Therefore, the installation
of B-UPI4NET should be handled with extra care. Detach the board from the frame carefully by
pulling it from the X3 connector (25 pin female D-connector).
3.
Remove the new PC board from the protective antistatic packaging. Always hold the
board by the edges and wear a wrist-grounding strap.
4.
Insert the new PC board into the vacant slot and firmly press the board into position.
Secure the board (two or four screws).
5.
Insert all other circuit boards, cover plates and EMC plates.
6.
Reconnect the power cord.
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