1-35FAX-L350 Chapter 1: General Description5.3.7 Replacing ROMObserve the following precautions when replacing the ROM on the SCNT board, for example, when replac-ing a defective ROM.a) PreparationPrint out all battery backed up data.Reception image data in image memory is erased appox. one hour after power is turned off.b) Replacement(1) Make sure that the power cord is disconnected.(2) Put on the grounding wrist straps to counter electrostatic discharge.(3) Open the operation cover, remove the 1 screw on the inner cover, and remove the ROM cover referringto the“Parts catalog” (supplied separately).(4) Remove the ROM mounted on the SCNT board using the ROM extractor etc.(5) Insert the new ROM, making sure that the notches on the ROM package and IC socket are aligned.c) After replacement(1) When a defective ROM is being replaced with a new ROM, turn the power on after mounting on theSCNT board. This completes replacement.(2) When the ROM is replaced for upgrading the software and upgrading involves changing softwareswitch settings such as service data, you must perform the following operation.• Perform All Clear operation. After you perform All clear operation, register the backed up data referringthe list you printed out earlier.
