Brother DCP-6690CW - Manual (Page 75)

Safety and Legal
69
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IMPORTANT - For your safety
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To ensure safe operation, the supplied three-pin plug must be inserted only into a standard three-
pin electrical socket that is effectively grounded through the normal household wiring.
The fact that the equipment operates satisfactorily does not imply that the power is grounded and
that the installation is completely safe. For your safety, if in any doubt about the effective
grounding of the power, consult a qualified electrician.
LAN connection
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CAUTION
DO NOT connect this product to a LAN connection that is subject to over-voltages.