Brother HL 1240 - B/W Laser Printer Service Manual page 265

!
Caution
Be sure to turn off the power switch and unplug the AC cord to the printer before
installing or removing the SIMM to/from the main controller PCB.




2.
Open the rear cover. Unscrew the screws securing the access cover and remove it.
Fig. 2-6 Removing the Main Controller PCB




3.
Unpack the SIMM and hold it by its edge.
!
Caution
SIMM boards may be damaged by even a small amount of static electricity. Do not
touch the memory chips or the board surface. When handling the board and before
installing or removing it, wear an antistatic wrist strap, or frequently touch the
surface of the antistatic package or bare metal on the printer.
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CHAPTER 2 OPTIONS