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Service Guide
191
Wiring Diagrams
Print engine wiring diagram
Drum
heater
Paper
preheater
I
2
C
10
I
2
C
misc
10
AC
8
I
2
C 10
I
2
C 11
Power
supply
15
18
8 AC
6 AC
8
120
120
120
120
Network
card
PCI
IDE
hard
drive
SDRAM
SDRAM
ROM
Printer ID
Main Board
SCSI
Cap/wipe/
purge unit
Ink
loader
Ink
load
board
Low
Empty
Cover
Drum
maintenance
counter EEPROM
I
2
C 4
Printhead
Power control board
Paper feed
motor
Process
motor
Process motor
position encoder
Drum
fan
Main
fan
X-axis
motor
Y-axis
motor
High capacity
paper tray 2
Size A/A4
Empty
Tray present
High capacity
paper tray 1
Size A/A4
Empty
Tray present
Process Gear
Position Sensor
Drumhome
sensor
Phaser 840
only
Drum
encoder sensor
Upper feed
roller clutch
Drum
maintenance
cam clutch
Pick
clutch
Preheater
exit sensor
Left I/O
board
Handfeed sensor
A-size sensor
A4-size sensor
Preheat entry
left edge sensor
J 140
J 180
J 150
4
3
6
3
4
2
2
2
Drum temperature sensor 2
2
2
2
3
J 990
J 970
J 170
Right I/O
board
Tray present sensor
A/A4-size sensor
Paper/OHP sensor
Empty sensor
Pick sensor
Drum maint.
cam home sensor
Cap/wipe/purge
unit home sensor
Cap/wipe/purge
clutch
Vacuum/pump
module
Transfix solenoid
Exit/tray full
sensor
Transfix exit
sensor
Vacuum
pump
Air valve
solenoid
Front panel
board
Front cover
switch
Top cover
switch
Duplex paper
sensor
I
2
C
10
4
4
2
2
2
2
2
2
3
5
0388-57
Phaser 840 only
Summary of Contents for Phaser 840
Page 11: ...xii Phaser 840 and 850 Color Printers ...
Page 65: ...54 Phaser 840 and 850 Color Printers ...
Page 101: ...90 Phaser 840 and 850 Color Printers ...
Page 125: ...114 Phaser 840 and 850 Color Printers ...
Page 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
Page 135: ...124 Phaser 840 and 850 Color Printers ...
Page 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Page 170: ...Service Guide 159 Figure 3 Paper path FRUs 0388 80 2 1 5 11 10 9 12 6 4 3 7 13 8 11a 11b ...
Page 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 174: ...Service Guide 163 Figure 5 Circuit board FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 81 12 7a ...
Page 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Page 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...