Brother HL-1240 - Manual (Page 56)

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4.
Install the SIMM into the slot at an angle and then push it gently towards the vertical
until it clicks into place.
Fig. 2-7 Install the SIMM
5.
Install the access cover.
6.
Secure the access cover with the two screws. Close the rear cover.
7.
Reconnect the interface cable (printer cable) from your computer. Plug the power
cord into the AC outlet and turn on the power switch.
8.
To check that the SIMM is installed correctly, you should perform a Test Print
“Print Configuration” which will print the current total memory size.
✒ Note
If you have already installed the serial interface (RS-100M), remove it first, and
then install the SIMM.