![background image](http://html.mh-extra.com/html/tektronix/phaser-840/phaser-840_quick-reference-manual_1078590024.webp)
14
Phaser 840 Color Printer
The main board
The main board features the printer’s PowerPC processor that controls the engine
and the PostScript processing. Prominent on the main board is the ROM code
DIMM and the RAM DIMM plug-in modules. The code ROM DIMM also
contains the printer’s on-board fonts. Variations of the ROM code DIMM contain
alternate language fonts such as Kanji or Hangul.
Network connection is provided through a built-in 10baseT port. A plug-in SCSI
interface adaptor board provides a SCSI port for an external hard drive or
scanner.
The printer stores unique printer status and PostScript values in its NVRAM
module. The printer’s Ethernet address, unique to each printer, is stored in the
printer ID chip, an 8-pin socketed IC. All these socketed components should be
transferred to a replacement main board to maintain customer-unique settings.
Features of the main board
0388-09
SCSI riser
board
RAM DIMMs
NV RAM/
Real Time Clock
Code ROM
DIMM
Boot ROM/
Printer ID
Summary of Contents for Phaser 840
Page 46: ...36 Phaser 840 Color Printer ...
Page 95: ...Service Guide 85 Clearing PostScript NVRAM menu item ...
Page 96: ...86 Phaser 840 Color Printer ...
Page 121: ...Service Guide 111 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 ...
Page 125: ...Service Guide 115 Figure 3 Paper path FRUs 0388 16 2 1 5 11 10 9 12 6 4 3 7 13 8 ...
Page 127: ...Service Guide 117 Figure 4 Motors and fans FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 129: ...Service Guide 119 Figure 5 Circuit boards FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 13 12 ...
Page 131: ...Service Guide 121 Figure 6 Solenoids and clutches FRUs 4 5 3 2 1 0388 23 ...
Page 137: ...Service Guide 127 Figure 9 High capacity PaperTray 0388 65a 1 2 ...
Page 142: ...132 Phaser 840 Color Printer ...
Page 154: ...144 Phaser 840 Color Printer ...