Panasonic CS-VZ9SKE Service Manual page 143

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How to remove control board (indicator and signal receptor)
1 Disconnect connector CN-DISP (white)....Control board......and CN-SENS (white).......Human sensor.
2 Disengage the tabs (1 location on the plastic indicator cover).
3 Flip the plastic indicator cover and disengage the tabs. (4 locations).
Tab
CN-SENS
Tab
143
CN-DISP