Main Board And Its Components - Xerox Phaser 840 Service Manual

Main board and its components

Phaser 840 printer:
Power down the printer. Leave the power cord plugged in to provide a ground path for
1.
static discharges. Remove the interface cables.
Loosen the two rear panel securing screws.
2.
Slide out the main board.
3.
If you are replacing the main board, transfer the socketed realtime clock/NVRAM chip
4.
and the printer ID chip to the new board so that the printer's settings and Ethernet
address are retained. Also swap the SCSI riser board, code ROM DIMM and the
SDRAM DIMMs.
RAM
DIMMS
SCSI
riser
board
Printer
ID
Main
board
Press here
when installing
Fig 7-1 Removing the Phaser 840 printer main board
7 - 180 Phase
Realtime
clock/NVRAM
Code ROM
DIMM
840-4-36