Diagnostic aids
3-43
7541-03x
Duplexing
If a page is two-sided, a signal is sent to the Printer Controller Board once the trailing edge of the paper passes
the Fuser Exit Sensor. The leading edge of the paper partially feeds from the Exit Rolls and then reverses
direction and feeds into the Duplex Unit. This method of re-feed is called a “Peek-a-boo”.
The Duplex Entry Rollers pass the paper down to the Duplex Transport Rollers along the right side of the printer.
Once the paper reaches the bottom, the Duplex Exit/MPF detection lever senses the leading edge of the media
at the Duplex Exit Roller and it engages the Duplex re-feed clutch to transport the sheet of paper into the EP
paper path.
Note:
Once the media reaches the Duplex Exit/MPF detection lever, it shares the same paper path as the
MPF.
Tr
a
nsfer roll
P
a
per
P
a
per
P
a
per
MPF Registr
a
tion roller
Duplex entry roller
Duplex clutch
Lower duplex tr
a
nsport roll
Duplex / MPF sensor
a
ctu
a
tor
Timing belt
Timing belt
Timing belt
Exit roll
Fuser exit roll
P
a
per exit sensor
S
td Registr
a
tion roller
Duplex exit roll
ᓙᯏᬌ⍮㩤㩔㩨㨺
Registr
a
tion
S
ensor
P
a
per
(Delivery roll)
Summary of Contents for X925
Page 14: ...xiv Service Manual 7541 03x ...
Page 182: ...3 50 Service Manual 7541 03x ...
Page 228: ...4 46 Service Manual 7541 03x 5 Remove the two screws C 6 Remove the two screws D ...
Page 229: ...Repair information 4 47 7541 03x 7 Remove the one screw E 8 Remove the four screws F on top ...
Page 230: ...4 48 Service Manual 7541 03x 9 Remove the two screws G on top 10 Remove the two screws H ...
Page 231: ...Repair information 4 49 7541 03x 11 Remove one screw I 12 Remove the screw J ...
Page 285: ...Repair information 4 103 7541 03x 4 Disconnect the fan cable B from the MDCONT engine board ...
Page 300: ...4 118 Service Manual 7541 03x 5 Remove the screw C 6 Remove the screw D ...
Page 301: ...Repair information 4 119 7541 03x 7 Remove the screw E ...
Page 358: ...4 176 Service Manual 7541 03x 6 Lift and pull the tray away from the printer ...
Page 368: ...4 186 Service Manual 7541 03x 5 Take the MPF shaft out 6 Remove the MPF roll ...
Page 392: ...5 4 Service Manual 7541 03x Rip Board connectors ...
Page 398: ...5 10 Service Manual 7541 03x Printhead controller connectors ...
Page 407: ...Locations 5 19 7541 03x Engine board connectors ...
Page 426: ...5 38 Service Manual 7541 03x ...
Page 428: ...6 2 Service Manual 7541 03x ...
Page 430: ...7 2 Service Manual 7541 03x Assembly 1 Covers ...
Page 432: ...7 4 Service Manual 7541 03x Assembly 2 Flatbed and ADF ...
Page 434: ...7 6 Service Manual 7541 03x Assembly 3 Flatbed ...
Page 436: ...7 8 Service Manual 7541 03x Assembly 4 ADF 1 ...
Page 438: ...7 10 Service Manual 7541 03x Assembly 5 ADF 2 ...
Page 440: ...7 12 Service Manual 7541 03x Assembly 6 Duplex components 1 ...
Page 442: ...7 14 Service Manual 7541 03x Assembly 7 Duplex components 2 ...
Page 444: ...7 16 Service Manual 7541 03x Assembly 8 Paper exit ...
Page 446: ...7 18 Service Manual 7541 03x Assembly 9 Base 1 ...
Page 448: ...7 20 Service Manual 7541 03x Assembly 10 Base 2 ...
Page 450: ...7 22 Service Manual 7541 03x Assembly 11 Base 3 ...
Page 452: ...7 24 Service Manual 7541 03x Assembly 12 Paper feed ...
Page 454: ...7 26 Service Manual 7541 03x Assembly 13 Electrical 1 ...
Page 456: ...7 28 Service Manual 7541 03x Assembly 14 Electrical 2 ...
Page 458: ...7 30 Service Manual 7541 03x Assembly 15 Upper assembly ...
Page 460: ...7 32 Service Manual 7541 03x Assembly 16 Printhead controller board cables ...
Page 462: ...7 34 Service Manual 7541 03x Assembly 17 Paper trays ...
Page 464: ...7 36 Service Manual 7541 03x Assembly 18 Fuser ...
Page 466: ...7 38 Service Manual 7541 03x Assembly 19 550 sheet option feeder covers ...
Page 468: ...7 40 Service Manual 7541 03x Assembly 20 550 sheet option feeder base ...
Page 470: ...7 42 Service Manual 7541 03x Assembly 21 550 sheet option feeder paper feed ...
Page 472: ...7 44 Service Manual 7541 03x Assembly 22 550 sheet option feeder tray ...
Page 488: ...I 14 Service Manual 7541 03x ...