Brother HL 1240 - B/W Laser Printer Service Manual page 188

INDEX
Engine Interface Error ..................6-5, 6-7, 6-22
envelope....................................................1-6
environment........................................2-1, 6-1
error message ...........................................6-6
F
face-down..................................................1-8
face-up ......................................................1-8
factory inspection mode .................6-46, 6-47
Factory Reset ..........................................6-45
faint print..................................................6-33
fan motor ........................................3-18, 4-33
faulty registration .....................................6-32
first eject roller ...................... 3-17, 3-20, 4-24
first print.....................................................1-4
fixing heater temperature failure..............6-20
fixing unit ........................................3-17, 4-17
front cover ........................................1-3, 4-10
front registration sensor lever.........3-17, 3-19
fuser failure..............................................6-21
Fuser Malfunction...............................6-5, 6-7
G
general block diagram ...............................3-1
ghost........................................................6-39
gray background......................................6-37
grease ..............................................4-5, 4-16
grid...........................................................3-21
ground contact.........................................6-41
H
halogen heater lamp................................4-20
heat roller.............................. 3-17, 3-24, 4-20
heat roller cleaner....................................4-22
Hex Dump Print .......................................6-45
High Resolution Control.............................1-2
high-voltag power supply PCB .......3-18, 4-28
circuit diagram .................................... A-28
high-voltage power supply.......................3-16
hollow print ..............................................6-37
horizontal lines.........................................6-38
HRC...........................................................1-2
humidity .....................................................1-5
I
IEEE1284 ..................................................3-5
image defect ............................................6-23
all black ............................................... 6-27
black band........................................... 6-36
black horizontal stripes........................ 6-30
black spots .......................................... 6-36
black vertical streaks........................... 6-29
black vertical streaks (in a gray background)
......................................................... 6-30
blurred horizontal stripes..................... 6-30
blurred vertical streaks ........................ 6-29
completely blank ................................. 6-26
dark ..................................................... 6-25
dirt on the back of paper ..................... 6-28
downward fogging of solid black ......... 6-38
examples............................................. 6-23
faint print.............................................. 6-33
faulty registration................................. 6-32
ghost ................................................... 6-39
gray background ................................. 6-37
hollow print .......................................... 6-37
horizontal lines .................................... 6-38
image distortion ................................... 6-33
light...................................................... 6-24
light rain............................................... 6-39
poor fixing............................................ 6-32
toner specks........................................ 6-40
troubleshooting.................................... 6-24
white horizontal stripes........................ 6-31
white spots .......................................... 6-34
white vertical streaks........................... 6-31
image distortion....................................... 6-33
incorrect printout ..................................... 6-42
inspection mode...................................... 6-46
installation
drum unit ............................................... 2-5
printer .................................................... 2-3
printer driver .......................................... 2-6
USB driver............................................. 2-7
insufficient output from high-voltage power
supply unit ........................................... 6-20
interface .................................................... 1-5
L
Laser BD Malfunction ........................ 6-5, 6-7
laser unit ................................................. 4-14
light ......................................................... 6-24
light rain .................................................. 6-39
link........................................................... 4-16
lock lever................................................... 4-8
lower tray relay PCB ............................... 4-26
ii