Samsung ST76 Service Manual page 15

Disassembly and reassembly
2. Disassembly of KEY PCB ASSY.
(a) Lift up the KEY PCB ASSY in the direction of the arrow and remove it.
(b) Remove the CONNECTOR as indicated " Fig. A" below.
3-4
KEY PCB ASSY
Fig 3-6
Remove the FPCB from the connector.
FPCB
Fig 3-7
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Fig. A