Brother MFC-4820C, Service Manual

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3-6
WARNING
The machine must be grounded using a 3-prong plug.
Since the machine is grounded through the power outlet, you can protect yourself from
potentially hazardous electrical conditions on the telephone network by keeping the power to
your machine on when you connect it to a telephone line. Similarly, you can protect yourself
when you want to move your machine by disconnecting the telephone line first and then the
power cord.
NOTE: If you are sharing one phone line with an external telephone, connect it as shown below.
NOTE: If you are sharing one phone line with an external telephone answering machine, connect
it as shown below.
Please select Receive Mode to MANUAL if you have an external answering machine.