Lexmark T420 Quick start guide

Extracted From Service Manual

Edition: September 2002
The following paragraph does not apply to any country where such provisions are
inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THIS
PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do
not allow disclaimer of express or implied warranties in certain transactions; therefore, this
statement may not apply to you.
This publication could include technical inaccuracies or typographical errors.Changes are
periodically made to the information herein; these changes will be incorporated in later
editions. Improvements or changes in the products or the programs described may be
made at any time.
Comments may be addressed to Lexmark International, Inc., Department D22A/032-2,
740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or e-mail at
[e-mail]. Lexmark may use or distribute any of the
information you supply in any way it believes appropriate without incurring any obligation
to you. You can purchase additional copies of publications related to this product by
calling 1-800-553-9727. In other countries, contact your point of purchase.
Lexmark, Lexmark with diamond design, MarkNet, MarkVision, Optra, and Prebate are
trademarks of Lexmark International, Inc., registered in the United States and/or other
countries.
Optra Forms and PictureGrade are trademarks of Lexmark International, Inc.
Other trademarks are the property of their respective owners.
© 2002 Lexmark International, Inc.
All rights reserved.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
This software and documentation are provided with RESTRICTED RIGHTS. Use,
duplication or disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc.,
Lexington, KY 40550.
4048–00x
U.S.A. P/N 12G9119

Parts Catalog 7-1
4048–00x
7. Parts Catalog
How to Use This Parts Catalog
•SIMILAR ASSEMBLIES: If two assemblies contain a majority of
identical parts, they are shown on the same list. Common parts
are shown by one index number. Parts peculiar to one or the
other of the assemblies are listed separately and identified by
description.
•AR: (As Required) in the Units column indicates that the
quantity is not the same for all machines.
•NS: (Not Shown) in the Asm-Index column indicates that the
part is procurable but is not pictured in the illustration.
•PP: (Parts Packet) in the parts description column indicates the
part is contained in a parts packet.

7-2 Service Manual
4048–00x
Assembly 1: Covers
2
9
1
3
4
5
10
8
6
7

Parts Catalog 7-3
4048–00x
Assembly 1: Covers
Asm-
Index Part Numbers Units Description
1–1 56P0608 1 Cover Assembly, Rear
2 56P0607 1 Door Assembly, Rear Exit
3 56P0680 1 Flap, Paper Holder
4 56P0603 1 Cover Assembly, Duct
5 56P0604 1 Cover Assembly, Top
6 56P0605 1 Cover Assembly, Right
7 56P0601 1 Cover Assembly, Front, with Display
(without logo)
7 56P0602 1 Cover Assembly, Front with Display
(with logo)
8 56P0610 1 Cover Assembly, MPF Door
9 56P0679 1 Overlays, Language
10 56P0600 1 Cover Assembly, Left

7-4 Service Manual
4048–00x
Assembly 2: Multipurpose Feeder (MPF)
1
3
4
5
2

Parts Catalog 7-5
4048–00x
Assembly 2: Multipurpose Feeder (MPF)
Asm-
Index Part Numbers Units Description
2–1 56P0612 1 Housing Assembly, Upper (MPF)
2 56P0611 1 Housing Assembly, Lower (MPF)
3 56P0615 1 Cap, MPF Paper Feed Cover
4 56P0613 1 Assembly, Roller (MPF)
5 56P0614 1 Gear, MPF Paper Pick

7-6 Service Manual
4048–00x
Assembly 3: Charging
4
5
3
2
1
6
2
3
7

Parts Catalog 7-7
4048–00x
Assembly 3: Charging
Asm-
Index Part Numbers Units Description
3–1 56P0640 1 Roll, Charge
2 56P0668 1 Parts Pack, (Screws and E–Rings)
3 56P0669 1 Hinge, Pivot (quantity 2)
4 56P0642 1 Guide Assembly, Right
5 56P0643 1 Assembly, Transfer Roll
6 56P0644 1 Bearings, Transfer Roll
7 56P0641 1 Guide Assembly, Left

7-8 Service Manual
4048–00x
Assembly 4: Electronics and Cables
12
3
4
5
67
89
10
11

Parts Catalog 7-9
4048–00x
Assembly 4: Electronics and Cables
Asm-
Index Part Numbers Units Description
4–1 56P0626 1 Power Supply, 110 V
1 56P0627 1 Power Supply, 220 V
2, 7, 8, 9 56P0663 1 Cable Assembly, Main Harness
Locations:
2. HVPS
7. Fan
8. LVPS Power
9. LVPS Control
NS Paper–In, Duplex
3 56P0628 1 PS, High Volt
4 56P0641 1 Guide Assembly, Left
5 56P0650 1 Cable Assembly, LVPS to Fuser
6 56P0630 1 Fan, Cooling
10 56P0617 1 Card Assembly, RIP
10 56P0619 1 Card Assembly, Network RIP
11 56P0622 1 Cable Assembly, Printhead

7-10 Service Manual
4048–00x
Assembly 4 (cont.): Electronics and Cables
3
7
13
5
16
9
15
2
10
6
4
8
1
11
14
12
11
5

Parts Catalog 7-11
4048–00x
Assembly 4 (cont.): Electronics and Cables
Asm-
Index Part Numbers Units Description
4–1 56P0624 1 Cable Assembly, Cover Switch
2 56P0621 1 Cable Assembly, Operator Panel
3 56P0625 1 Switch, Interlock Cover
4 and 5 Sensor and Cable Included with
P/N 56P0611 (lower MPF housing)
6 and 8 56P0616 2 Solenoid, Paper Feed
7 56P0653 1 Sensor, Toner Level
9 56P0631 1 Cable Assembly, Drawer
10 56P0617 1 Card Assembly, RIP
10 56P0619 1 Card Assembly, Network RIP
11 56P0664 1 Cable Assembly, Output Full (and
Fuser Exit)
12 56P0652 1 Sensor, Smart Button
13 56P0682 1 Sensor Cable, Output Full
14 56P0665 1 Connector, 3–Pin
15 56P0666 1 Connector, 2–Pin
16 56P0645 1 Sensor, Photo
NS 56P0649 1 Cable Assembly, Fuser Exit
NS 56P0620 1 Cable Assembly, Motor

7-12 Service Manual
4048–00x
Assembly 4 (cont.): Electronics and Cables
This page left intentionally blank.

Parts Catalog 7-13
4048–00x
Assembly 4 (cont.): Electronics and Cables
Asm-
Index Part Numbers Units Description
NS 70G0478 1 Power Cord, Bolivia, Canada,
Caribbean Countries, Columbia,
Costa Rica, Dominican Republic,
Equador, El Salvador, Guatemala,
Honduras, Japan, Mexico,
Nicaragua, Peru, Panama, Puerto
Rico, Saudi Arabia, Taiwan, The
Virgin Islands, Venezuela, US,
AP–LV
NS 1339528 1 Power Cord, Bahrein, Cyprus, Iraq,
Ireland, Kuwait, Oman, Qatar, UAE,
UK, Yemen, (HV)
NS 1339529 1 Power Cord, Austria, Belgium,
Bosnia, Bulgaria, Catalan, Czech,
Croatia, Egypt, Albania (Euro
English and other East), Finland,
France, Germany,Greece,Hungary,
Iceland, Iran, Italy, Jordan,
Lebanon, Macedonia, Netherlands,
Norway, Paraguay, Poland,
Portugal, Romania, Russia, and
CIS, Slovak Countries, Slovenia,
Spain, Sweden, Syria, Turkey,
Yugoslavia (Serbia and
Montenegro)(HV)
NS 1339530 1 Power Cord, Israel (HV)
NS 1339531 1 Power Cord, Switzerland (HV)
NS 1339532 1 Power Cord, Lybia, Pakistan, South
Africa (HV)
NS 1339533 1 Power Cord, Chile, Uruguay (HV)
NS 1339534 1 Power Cord, Denmark (HV)
NS 43H5545 1 Power Cord, PR China (HV)
NS 1339548 1 Power Cord, Brazil (LV)
NS 11D0330 1 Power Cord, Argentina
NS 1339520 1 Power Cord, U.S. (HV) RPQ

7-14 Service Manual
4048–00x
Assembly 5: Paper Feed
1
2
5
6
7
8
3
4
14
15
17
10
9
11
12
13
16

Parts Catalog 7-15
4048–00x
Assembly 5: Paper Feed
Asm-
Index Part Numbers Units Description
6–1 56P0677 1 Flags, Stack Control
2 56P0651 1 Assembly, Duplex
3 56P0645 1 Sensor, Photo
4 56P0618 1 Spring, D–Roll
5 56P0656 1 Roll, Paper Feed
6 56P0655 1 Bracket, Paper Sensor
7 56P0657 1 Assembly, Paper Feed
8 56P0654 1 Plate Assembly
9 56P0634 1 Gear, Paper Feed
10 56P0693 1 Roller Asm., Reference Backup
(Top Front and Rear)
11* 56P0633 1 Assembly, Drive
12 56P0632 1 Motor Assembly, Main Drive
13 56P0638 1 Coupling, Cartridge
14* 56P0637 1 Drive, Ratchet
15* 56P0635 1 Assembly, Motor
16* 56P0636 1 Gears, Spur
17 56P0639 1 Guide, Link
* Order a lubricant to use with these gears,
P/N 99A0394, (FRU, Nyogel 744). See
page 4-3 for more information.

7-16 Service Manual
4048–00x
Assembly 6: Frame
1
2
3
9
8
6
5
4
4
7
10
11
12
4
4
8

Parts Catalog 7-17
4048–00x
Assembly 6: Frame
Asm-
Index Part Numbers Units Description
7–1 56P0606 1 Duct, Air
2 56P0623 1 Assembly, Printhead
3 56P0629 1 Assembly, Cartridge Contacts
(quantity 5)
4 56P0662 1 Feet, Base
5 56P0661 1 Damper, Tray
6 56P0668 1 Parts Pack, (Screws and E–Rings)
7 56P0609 1 Assembly, Tray 1
8 56P0667 1 Latch, Door (Qty. 3)
9 56P0660 1 Roller, Paper Guide
10 56P0659 1 Bracket, Shutter
11 56P0672 1 Bracket, Body–Tray
12 56P0658 1 Guide, Entrance

7-18 Service Manual
4048–00x
Assembly 7: Fuser
1
2
3
4