Unit PB1050
(D573)
1. REPLACEMENT AND ADJUSTMENT
1.1 BEFOREHAND
 Before installing options, please do the following:
 If there is a fax unit in the machine, print out all messages stored in the memory, the lists
of user-programmed items, and the system parameter list.
 If there are printer jobs in the machine, print out all jobs in the printer buffer.
 Turn off the main switch and disconnect the power cord, the telephone line, and the
network cable.
 Always touch a grounded surface to discharge static electricity from your hands before
you handle SD cards, printed circuit boards, or memory boards.
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