HP LaserJet MFP Analog Fax Accessory 300, Fax Manual

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4 Chapter 1 Setting up
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4 Disconnect all the cables (2) from the formatter (1), see Figure 1-3.
Remember where the cables are removed from to ensure that you
reinstall them in the same locations.
Note
If this is the first time the fax is installed, remove the small cover over
the opening for the phone jack on the rear panel of the formatter before
inserting the fax card into the formatter.
The formatter board contains parts that are sensitive to electrostatic
discharge (ESD). When handling the formatter board, use static
protection, such as a grounding wrist strap connected to the metal
frame of the MFP or hold the metal frame with your hand. Also, avoid
touching the components on the board.
5 Loosen two captive thumb-screws (3) at the top and bottom of the
formatter plate, see Figure 1-3, and pull the formatter plate and
board (1) out of the MFP. Set the formatter board on a flat,
non-conductive surface.
Figure 1-3
HP LaserJet 9040/9050mfp formatter removal
The fax card contains parts that are sensitive to electrostatic
discharge (ESD). When removing the fax card from its antistatic
pouch and while installing it, use static protection such as a grounding
wrist strap connected a grounded metal component such as the metal
frame of the MFP, or touch the grounded metal frame with your hand.
Also, avoid touching the components on the board.
Note
If you are replacing an existing fax card, remove the card that is to be
replaced from the formatter.