HP LaserJet Pro M402d - Page 200

crooked pages 148
cross-sectional printer view
block diagram 51
curl, paper
settings 74
curled media 148
D
dark print 143
dark print, troubleshooting 143
darkness
dark print, troubleshooting 143
DC controller
components 6
fans 8
motors 8
DC motors 8
DC voltages converted from AC 9
default settings, restoring 74
NVRAM initialization 164
defaults
restoring 160
demo page 70
determine problem source 44
developer's 162
developer's menu 162
development process 22
diagrams
block 51
circuit 61
cross-sectional printer view 51
fan 57
main assemblies PCAs 59
main PCAs (printer base) 59
major components (printer
base) 56
motor 57
PCA connections 53
rollers (printer base) 58
rollers and pads 58
timing 60
Diagrams: DC controller connectors
locating 53
dimensions, printer, M402 and
M403 174
dimensions, printer, M426 and M427
172
display contrast, setting 74
document conventions iii
document feeder
jams 122
dots, troubleshooting 145
drivers
usage page 71
drum cleaning 24
duplexer
clearing jams 117, 140
duplexing unit
motors 8
E
electrical components
paper feeder (optional Tray 3)
35
electrical components, pickup and
feed
paper feeder (optional Tray 3)
36
electrical specications 176
Embedded Web Server (EWS)
features 62
engine-control system
components 5
error messages
error report 96
event log 96, 97
types of 79
exhaust fans 8
Explorer, versions supported
HP Embedded Web Server 62
F
factory defaults, restoring 74
NVRAM initialization 164
faded print 143
failure detection
laser/scanner 17
motors 8
fan (printer base)
block diagram 57
fans
DC controller 8
exhaust 8
intake 8
fax
solve general problems 166
fax troubleshooting
checklist 165
rmware version 162
fonts
Courier settings 74
lists, printing 71
front page dirty 144
front page dirty,
troubleshooting 144
front page dirty, troubleshooting
144
fuser 12
clearing jams 111, 134
components 13
control functions 14
control-circuit function 12
temperature protection 15
See also fusing and delivery unit
fusing process 24
G
graph paper, printing 71
gray background, troubleshooting
146
H
heaters
fuser 13
high-voltage power supply (HVPS)
bias generation 12
circuits 12
operations 11
horizontal lines 145
horizontal lines,
troubleshooting 145
horizontal lines, troubleshooting
145
horizontal white lines 145
horizontal white lines,
troubleshooting 145
horizontal white lines,
troubleshooting 145
HP Embedded Web Server (EWS)
features 62
HP Jetdirect print server
NVRAM initialization 164
HVPS (high-voltage power supply)
bias generation 12
circuits 12
operations 11
I
image quality
archive setting 74
182 Index ENWW