HP color laserjet 2550 series Manuale Di Servizio

factory defaults, restoring 221
faded print, troubleshooting 192
fans

diagrams 73
replacing 127

features 2
feed-drive shaft, replacing 153
fonts

included 5
troubleshooting 212, 215

formatter

PJL commands 223
replacing 113

formatter cage, replacing 111
fraud hotline 66
front cover, replacing 130
front frame assembly, diagrams and part numbers 246
front lower cover, replacing 121
fuser

control circuit 70
diagram 84
life expectancy 51
operations 89
replacing 104
roller, testing 219
wrap sensor, replacing 161

fuser motor

diagrams 75
replacing 116

fusing delivery paper sensor (PS1) 75, 77

gear assembly, replacing 136
gear-train motor (DCM701) 76
Go light/button

locating 36
status 183

gray background, troubleshooting 194

heavy paper specifications 17
high-voltage power supply

locating 70
replacing 158
troubleshooting 219

HP Customer Care Online 238
HP fraud hotline 66
HP LaserJet Toolbox

accessing 236
calibrating printer 63
cleaning page, printing 61
device settings 47
operating systems supported 9
using 44

HP Technical Training 238

HP Web Jetadmin

operating systems supported 9
using 11

humidity specifications

paper, storing 19
printer environment 16

IBM OS/2 support 9
image formation

developing stage 86
engine control system 70
fusing stage 89
laser beam operations 86
primary charging stage 85
separation stage 89
stages 85
system components 84
transfer stage 87

image quality

color, troubleshooting 200
specifications 4
troubleshooting 190, 199

images, repeated 199
imaging drum

cleaning operations 93
E-label 94, 132
life expectancy 51
non-HP supplies policy 66
operations 74, 84, 86
replacing 103
status light 35, 178
status page, printing 226
status, checking 64
storing 65
warranty 24

information pages

printing 225
troubleshooting 169

input trays. See trays
installing printer 32
interface cover, replacing 110
interface ports

cables 239
connecting to 33
locating 7
Macintosh issues 215
troubleshooting 170
types included 5

internal components, diagrams and part numbers

printer 251

Internet Explorer, versions supported 44
INTR (initial rotation) sequence 71
ITB cleaning operations 84, 90, 92

ENWW

Index