Brother HL 1240 - B/W Laser Printer Service Manual page 189

low-voltage power supply ........................3-15
low-voltage power supply PCB.......3-18, 4-27
circuit diagram ............................. A-26 - 27
M
main cover...............................................4-12
main motor......................................3-18, 4-15
main motor does not rotate .....................6-19
MAIN MOTOR ERROR .............................6-7
Main Motor Malfunction................................ 6-5
main PCB .......................................3-18, 4-26
block diagram ........................................3-3
circuit diagram ............................. A-18 - 24
maintenance information ..........................A - 8
malfunction ..............................................6-18
BD failure .............................................6-20
CPU runtime error................................6-22
D-RAM error ........................................6-22
engine interface error...........................6-22
fixing heater temperature failure ..........6-20
fuser failure ..........................................6-21
insufficient output from high-voltage power
supply unit ........................................6-20
main motor does not rotated................6-19
no AC power supplied..........................6-18
no DC power supplied .........................6-18
no paper supplied ................................6-19
NVRAM error .......................................6-22
ROM error............................................6-22
scanner failure .....................................6-21
Service A .............................................6-22
Service B .............................................6-22
manual duplex .........................................2-11
manual feed paper guide...........................1-3
manual feed slot ...............................1-3, 2-10
memory .....................................................1-5
MEMORY FULL .................................6-6, 6-8
MISFEED...................................................6-6
modular jack for lower tray unit .................1-3
MTBF.........................................................5-7
MTTR ........................................................5-7
N
no AC power supplied .............................6-18
no DC power supplied .............................6-18
NO PAPER................................................6-6
no paper supplied ....................................6-19
noise ..........................................................1-5
normal paper............................................. 1-6
NV-RAM Error........................... 6-5, 6-7, 6-22
NV-RAM value dump mode .................... 6-46
NVRAM................................................... A-14
O
operator call .............................................. 6-4
optional RAM .......................................... 3-11
organizer................................................... 1-6
output tray................................................. 1-3
P
packing ................................................... 4-37
page counter..................................... A-5, A-7
page skew............................................... 6-13
panel PCB...................................... 3-18, 4-30
paper.................................................. 1-6, 6-1
basis weight .......................................... 1-6
caliper.................................................... 1-6
jam....................................................... 6-10
loading.......................................... 2-5, 2-10
moisture content.................................... 1-6
problem ................................................. 6-9
recommended ....................................... 1-7
size ........................................................ 1-6
type ....................................................... 1-6
paper cassette ................ 1-3, 2-10, 4-4, A-15
capacity ................................................. 1-7
paper cassette cover ................................ 4-5
paper feed roller.................... 3-17, 3-19, 4-36
paper indicator ................................... 1-3, 4-9
PAPER JAM..................................... 6-6, 6-10
Paper LED .............................................. 2-13
paper pick-up roller ............... 3-17, 3-19, 4-35
parallel interface........................................ 1-3
parallel interface cable .............................. 2-6
periodical replacement parts..................... 5-4
photosensitive drum....................... 3-17, 3-21
pinch roller ............................................... 4-13
poor fixing ............................................... 6-32
power consumption................................... 1-5
power source ............................................ 1-5
power supply.................................... 2-1, 3-15
power switch ............................................. 1-3
pressure plate ........................................... 4-7
pressure plate spring ................................ 4-7
pressure roller........................................... 3 -24
cleaning ............................................... 6-28
iii
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