Chapter 33-83.5 Parts Replacement Procedure3.5.1 Main Controller PCB3.5.1.1 Preparation for Removing the Image ProcessorPCB 0017-22481) Detach the rear cover.(page 9-4)Reference[Removing the Rear Cover]2) Detach the rear left cover.(page 9-4)Reference[Removing the Rear LeftCover]3.5.1.2 Removing the Image Processor PCB 0017-22491) Change the position of the jumper plug (JP100) [1] on the modem PCB(capacitor PCB).F-3-132) Detach the RAM cover [1].- 5 screws [2]F-3-143) Detach the SDRAM.(page 3-11)Reference[Removing the SDRAM]4) Detach the LAN cover [1].- 6 screws [2]F-3-155) Disconnect the connector [1] of the IP-LAN cable.F-3-166) Detach the modem PCB or the capacitor PCB [1].In the case of the modem PCB- 3 connectors [2]- 2 screws [3]If disconnecting/connecting the modem PCB (capacitor PCB) withoutimplementing this operation, the SDRAM may be broken.When turning off the main power switch and disconnecting the power plugfrom the power outlet, the power is supplied between the SDRAM and thesuper capacitor for image memory backup.If the jumper plug (JP100) is disconnected with the image being backed up,the contents in the memory are all cleared. Be sure to output all data in thememory before disconnecting the jumper plug (JP100).MEMO:The jumper plug is small. A needlenose pliers or tweezers may be useful inthis operation. To prevent short-circuit, avoid contact of the jumper pin to anearby metal through the tool.[1][1][1][2][1][2][2][1]
