HP LaserJet Enterprise M552 - Page 535

control functions 24
control-circuit function 22
identication 26
jams 465
life detection 26
temperature control 24
temperature protection 26
See also fusing and delivery unit
fusing process 38
G
General Settings menu, control
panel 187
glass (M577 only), cleaning 439
H
hardware integration pocket (HIP) is
not functioning 139
heartbeat LED 140
heat control for fuser 24
heaters
fuser 23
high-voltage power supply (HVPS)
bias generation 21
circuits 21
operations 20
home button is unresponsive 138
horizontal white lines,
troubleshooting 412
HP embedded Jetdirect page 182
HP Jetdirect print server
conguration page 182
lights 140
HVPS (high-voltage power supply)
bias generation 21
circuits 21
operations 20
I
I/O interfaces 9
image capture system
scanning (M577 only) 70
image in a particular color does not
print in the correct color,
troubleshooting 413
image quality
check paper and the printing
environment 405
check toner-cartridge status
403
clean the printer 404
inspect the toner cartridge 404
tray 1 rollers, clean 418
tray 2-X rollers, clean 429
image quality issues
examples and solutions 409
image-formation process
development process 36
drum cleaning 39
fusing process 38
ITB cleaning 39
laser-beam exposure 36
pre-exposure 35
primary charging 35
primary transfer process 37
secondary transfer process 37
separation process 38
image-information process 29
imaging drums
diagnostic test 147
individual component diagnostics
140
initial rotation period 5
input/output interfaces 9
installation
date calculation 478
verify for optional accessories
84, 180
intake fans 14
interlocks
defeating 145
intermediate transfer belt (ITB)
cleaning mechanism 48
components 45
engagement and disengagement
control 45
home position 45
operations 45
interpret control-panel messages and
event log entries 264
IPv4 information 182
IPv6 information 182
ITB (intermediate transfer belt)
cleaning mechanism 48
engagement and disengagement
control 45
home position 45
operation 45
ITB cleaning 39
J
jams
550-sheet trays 460
auto-navigation 449
causes of 449
detection in trays 3-5 69
diagnostic test for 148
document feeder 451
fuser 465
output bin 470
recovery 471
right door 465
sensor locations 448
sensors and switches 1x550-
sheet feeder 449
sensors, printer base 448
Tray 1 454
Tray 2 456
Jetdirect print server
lights 140
K
keyboard 8
L
laser-beam exposure 36
laser/scanner
failure detection 28
operations 27
safety 28
last rotation period 6
latent image formation 33
LDAP gateway
validating 492
LEDs. See lights
light print, troubleshooting 409
lights
formatter 140
troubleshooting with 140
link speed settings 256
loose toner, troubleshooting 413
low-voltage power supply (LVPS)
converted DC voltages 19
failure detection 20
operations 18
protection for components 19
stops and interruptions 19
LVPS (low-voltage power supply)
converted DC voltages 19
failure detection 20
ENWW Index 507