Lexmark C748de - Page 486

I-6 Service Manual
5026
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920.04—POST error 2-97
920.05—POST error 2-98
920.06—Input sensor 2-99
920.07—POST error 2-99
920.08—Exit sensor 2-100
920.09—POST error 2-102
920.10—POST error 2-103
920.11—POST error 2-104
920.12—POST error 2-105
920.13—POST error 2-106
920.14—POST error 2-107
920.15, 920.20—POST error 2-108
920.16—POST error 2-108
920.17—POST error 2-109
920.18—POST error 2-110
920.19—POST error 2-110
920.21—POST error 2-112
920.23—POST error 2-113
920.27, 920.28, 920.29-POST error 2-114
920.32—MPF paper present sensor not connected
2-114
925.01, 925.03, 925.05—fan error 2-114
925.02, 925.04, 925.06—blower error 2-115
945.xx, 947.xx—Transfer roll error 2-116
950.00–950.29-EPROM mismatch 2-118
956.xx-system board failure 2-119
bubble sensor 2-122
dead printer 2-124
networking 2-124
operator panel 2-127
print quality 2-128
tray linking 2-136
service error codes 2-21
Servo Laser Test 3-20
skew 3-5, 4-8, 4-18
duplex skew test 3-18
printhead alignment 4-8, 4-18, 4-148
specifications
dimensions
1-3
start 2-1
Static Sensor Tests 3-19
symptoms
print quality
2-10
printer 2-9
system board
parts catalog
7-10
removal 4-155
service check 2-119
system board support shield
parts catalog
7-10
removal 4-160
T
test pages
print quality test pages
3-13, 3-28
Quick Test 3-8
quick test (duplex) 3-16
theory
electrical interlock
24 V interlock switch
3-73
5 V interlock switch 3-73
electrophotographic (EP) process
charging
3-65
cleaning 3-72
developing 3-69
exposing 3-68
fusing 3-71
main components 3-63
transferring 3-70
electrophotographic process (EP) 3-63
paper path 3-51
main components 3-52
mechanical drive 3-57
paper sensing 3-61
print media transport 3-53
toner density calibration 3-31
toner level sensor
parts catalog
7-12
removal 4-163
toner patch sensing (TPS) 3-31
toner sensors
service check
2-102, 2-103, 2-104, 2-105
tools required 1-15
top access cover assembly
parts catalog
7-2
removal 4-54
top cover assembly
parts catalog
7-2
removal 4-58
top cover camshaft assembly
parts catalog
7-14
removal 4-165
transfer belt, part of transfer module 4-171
transfer module
removal
4-171
service check 2-97, 2-108, 2-110
transfer roll
service check
2-116
transport cable
removal
4-173
transport motor cable, removal 4-175
tray 1 missing
service check
2-135
tray linking, service check 2-136
U
USB HS Test Mode 3-16
USB Speed 3-34
W
waste toner assembly, removal 4-176
Wipe Disk 3-33
wireless network antenna 4-190
wireless network card 4-191