interlocks
defeating 145
intermediate transfer belt (ITB)
cleaning mechanism 40
components 37
engagement and disengagement
control 37
home position 38
operations 37
interpret control-panel messages
and event log entries 290
IPTU driver PCA (M680) 172
IPv4 information 201
IPv6 information 201
ITB (intermediate transfer belt)
cleaning mechanism 40
engagement and disengagement
control 37
home position 38
operation 37
ITB cleaning 33
ITB ghost image of calibration marks,
troubleshooting 485
J
jam detection
stapling mailbox 98
jams
1,500-sheet high-capacity input
tray 447
auto-navigation 432
causes of 432, 468
detection in paper feeder 74
detection sensors 62
detection theory 62
diagnostic test for 148
document feeder (M680) 456
fuser 452
locations (M651) 439
locations (M680) 438
lower-right door 451
output bin (M651) 460
output bin (M680) 460
recovery 466
right door 452
sensor locations 433
sensors and switches (M651)
433
sensors and switches (M680)
434
sensors and switches 1x500-
sheet feeders 435
sensors and switches HCI 436
sensors and switches mailbox
437
staples in the stapling mailbox
accessory (M680) 463
stapling mailbox accessory
(M680) 461
top cover (M680) 455
Tray 1 440
Tray 2 and the 500-sheet trays
442
types detected 62
JDI (HP Jetdirect Inside) 5
Jetdirect Inside (JDI) 5
Jetdirect print server
lights 140
K
keyboard 7
L
laser failure detection 24
laser-beam exposure 30
laser/scanner
failure conditions 24
operations 23
protective-glass cleaners
(PGCs) 25
last rotation period 4
latent image formation 28
LEDs. See lights
light or missing toner,
troubleshooting 474
light print, troubleshooting 473
lights
formatter 140
troubleshooting with 140
link speed settings 279
location of major components 178
loop control
slackness 57
loose toner, troubleshooting 479
low-voltage power supply (LVPS)
converted DC voltages 17
failure detection 19
operations 16
protection for components 17
safety provided by 17
stops and interruptions 17
lower-right door
clear jams 451
LVPS (low-voltage power supply)
converted DC voltages 17
failure detection 19
operations 16
protection for components 17
safety provided by 17
stops and interruptions 17
M
mailbox/job separator mode
stapling mailbox 97
Manage Supplies menu, control
panel 260
Manage Trays menu, control panel
266
manual print modes 469
manual sensor test 150
memory
flash card 5
inf
o
rmation 197
RAM 5
ROM 5
toner cartridge 35
menu map 105
menus, control panel
Administration 205
Backup/Restore 284
Calibrate/Cleaning (M651) 288
Calibrate/Cleaning (M680) 285
Copy Settings (M680 only) 222
Display Settings 258
Fax Settings (M680) 240
General Settings 208
Manage Supplies 260
Manage Trays 266
Network Settings 268
Print Options 256
Print Settings 253
Reports 205
Scan/Digital Send Settings
(M680) 229
Service 289
Troubleshooting 280
USB Firmware Upgrade 289
messages
types of 290
538 Index ENWW
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