Samsung DMS2.5 Service Manual page 10

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Procedure
6) Detach the connector of adapter from DMS 2.5.
7) Detach connectors for 485communication,
network and DI/DO.
8) Unscrew at red circle part.
(Use +Screw Driver)
Ref.) The case of using additional Hole for install,
detach from wall after detaching upper cover.
9) Push up DMS 2.5 and pull the DMS 2.5 front
direction.
Disassembly and Reassembly
Remark
3-3