Lexmark 13P0150 - C 750dtn Color Laser Printer Bedienungsanleitung

Lexmark™ C750

5060-00x

Lexmark Repair Catalog

The following information is from Lexmark's Service Mnaual.

Lexmark and Lexmark with diamond design are

trademarks of Lexmark International, Inc., registered

in the United States and/or other countries.

Revised: April 13, 2006

Edition: April 13, 2006

The following paragraph does not apply toany country where such provisions are inconsistent withlocal 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 ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any

of the information you supply in any way it believes appropriate without incurring any obligation to you.

Lexmark, Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the

United States and/or other countries.

ImageQuick, Optra Forms, and PrintCryption are trademarks of Lexmark International, Inc.

LEXFAX is a service mark of Lexmark International, Inc.

PostScript® is a registered trademark of Adobe Systems Incorporated.

PCL® is a registered trademark of the Hewlett-Packard Company.

Other trademarks are the property of their respective owners.

2006 Copyright Lexmark International, Inc.

UNITED STATES GOVERNMENT RIGHTS

This software and any accompanying documentation provided under this agreement are commercial computer software and

documentation developed exclusively at private expense.

U.S.A. P/N 12G9174

Repair information 4-1

5060-00x

Repair information

Warning: Read the following before handling electronic parts.

Handling ESD-sensitive parts

Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent

damage to ESD-sensitive parts, use the following instructions in addition to all the usual precautions, such as

turning off power before removing logic boards:

•Keep the ESD-sensitive part in its original shipping container (a special “ESD bag”) until you are ready to

install the part into the machine.

•Make the least-possible movements with your body to prevent an increase of static electricity from clothing

fibers, carpets, and furniture.

•Put the ESD wrist strap on your wrist. Connect the wrist band to the system ground point. This discharges

any static electricity in your body to the machine.

•Hold the ESD-sensitive part by its edge connector shroud (cover); do not touch its pins. If you are removing

a pluggable module, use the correct tool.

•Do not place the ESD-sensitive part on the machine cover or on a metal table; if you need to put down the

ESD-sensitive part for any reason, first put it into its special bag.

•Machine covers and metal tables are electrical grounds. They increase the risk of damage because they

make a discharge path from your body through the ESD-sensitive part. (Large metal objects can be

discharge paths without being grounded.)

•Prevent ESD-sensitive parts from being accidentally touched by other personnel. Install machine covers

when you are not working on the machine, and do not put unprotected ESD-sensitive parts on a table.

•If possible, keep all ESD-sensitive parts in a grounded metal cabinet (case).

•Be extra careful in working with ESD-sensitive parts when cold-weather heating is used because low

humidity increases static electricity.

4-2 Service Manual

5060-00x

Screw identification table

The following table contains screw types, locations, and quantities necessary to service the printer. Pay careful

attention to each screw type location when doing removals. You must install the correct screw type in each

location during reassembly.

Reference

number Screw type Location Purpose Qty

002 4-40 machine Parallel connector to shield Attach 2

102 M3.5x8mm

thread cutting Cartridge guides to upper frame Attach 8

Upper front cover to cartridge guides Attach 4

Front cover pivot to front upper cover Attach 2

Front left light shield to upper front cover Attach 1

121 M3.5x6mm

machine LVPS to lower frame Mounting 7

Right rear cover to LVPS Attach 1

HVPS standoffs to upper frame Attach 4

232 M3x6mm

Taptite metal

thread forming

Ground cable to right front cover support and

upper frame. Attach 2

Ground cable to bottom support plate and engine

card shield Attach 2

Back lamp brackets to fuser frame Attach 2

Front lamp brackets to fuser frame Attach 2

Blank INA covers to RIP shield Mounting 2

RIP card ground shield to RIP shield Mounting 5

RIP shield to engine shield Mounting 4

RIP card to RIP shield Mounting 12

Engine card to engine shield Mounting 6

RIP shield cover to RIP shield Mounting 8

V-block plates to upper frame Mounting 2

Ground cable strap to RIP ground shield Attach 1

Repair information 4-3

5060-00x

312 M2.9x6mm

Plastite Front access door assembly Mounting 3

Door handle to cover Mounting 2

Detent housing to cover Mounting 1

ITU switch housing to light shield Attach 1

Duplex baffle to lower right door Attach 4

Front and rear latches to lower right door Mounting 2

Bias latch cover to door Attach 1

MPF asm to MPF door Attach 6

Support bracket to MPF door Attach 4

MPF cable cover to door asm Mounting 1

MPF latch support brackets to upper frame Attach 2

Voltage cable to terminal (BOR/ITU) black Attach 1

Voltage cable to terminal (BOR/ITU) cyan Attach 1

Voltage cable to terminal (BOR/ITU) magenta Attach 1

Voltage cable to terminal (BOR/ITU) yellow Attach 1

323 M3.5x1.35mm

Plastite 8 long Frame support back plate to lower frame Attach 2

Door latch catch to frame Attach 2

Transfer HVPS to lower frame Mounting 1

Fuser top duct to lower frame Attach 1

Right front cover support to lower frame Attach 1

Front lower left cover to lower frame Attach 1

Front left handle cover asm to lower frame Attach 4

Front lower right cover to lower frame Attach 1

Front right handle cover asm to lower frame Attach 4

Right front cover to lower frame Attach 2

Left lower cover to lower frame Attach 2

Left upper cover asm to lower frame Attach 2

Left upper cover asm to upper frame Attach 1

Left lower pivot to lower frame Attach 2

Left upper pivot to left lower cover Attach 1

Rear cover to lower frame, left cover Attach 6

Rear fan cover to lower frame and top cover Attach 4

Top cover asm to upper front cover Attach 3

Top cover asm to RIP shield Attach 1

ITU light shield asm to upper front guide ITU Attach 1

Ribs to upper redrive door Mounting 5

Upper door hinges to upper frame (redrive) Mounting 2

Inner redrive asm to upper frame (redrive) Mounting 2

Developer HVPS to cartridge contact asm Mounting 4

Engine card shield to frame Mounting 5

BOR drive asm to upper frame Mounting 1

Reference

number Screw type Location Purpose Qty

4-4 Service Manual

5060-00x

323

(continued) M3.5 x 1.35mm

Plastite 8 long

(continued)

ITU drive asm to lower frame Mounting 3

Fuser drive asm to lower frame Mounting 4

Vacuum top duct to lower frame Mounting 2

Toner shield to lower frame Attach 4

Upper deflector to lower frame (PF XPORT) Mounting 2

VTB asm to lower frame

(PF XPORT) Mounting 2

Inner deflector to VTB assembly (PF XPORT) Attach 1

Jam access spring to VTB asm (PF XPORT) Attach 1

500 pick assembly to lower frame Mounting 3

Paper size sensing assembly to lower frame Mounting 1

Paper level sensing assembly to lower frame Mounting 3

324 M3.5x10mm

Plastite thread

forming

Transfer HVPS/RIP fan asm to RIP shield Attach 1

Front left light shield to left upper cover asm and

top cover Attach 1

Front right light shield to right front cover support

and top cover Attach 1

Cartridge drive assemblies to upper frame Mounting 12

Upper door hinges to upper frame (redrive) Attach 2

Inner redrive assembly to upper frame Mounting 2

412 2.9x5.2mm

Plastite Hinge restraint to door (MPF) SEMS Attach 1

423 M3.5x9 Plastite Tray bias bellcrank to tray Mounting 1

484 M3.5x14

Machine

Panhead

Printhead to upper frame Mounting 12

Reference

number Screw type Location Purpose Qty

Repair information 4-5

5060-00x

Removal procedures

CAUTION: Remove the power cord from the printer or electrical outlet before you connect or disconnect any

cable or electronic board or assembly for personal safety and to prevent damage to the printer. Disconnect any

connections between the printer and PCs/peripherals. The printer weighs 47.7 kg (105 lb) and requires at least

two people to lift it safely. Make sure your fingers are not under the printer when you lift or set the printer down.

Note: Some removal procedures require removing cable ties. You must replace cable ties during reassembly to

avoid pinching wires, obstructing the paper path, or restricting mechanical movement.

Top cover assembly removal

1. Remove the redrive cap.

2. Remove the right light shield screw type “324” (A) and “323” (B) and release tab (C) from the frame slot.

3. Remove the right light shield.

4-6 Service Manual

5060-00x

4. Remove the operator panel bezel.

5. Remove the top cover mounting screws (D) from the front of the printer.

6. Remove the three top cover screws (E) type “323” on page 4-3 from the rear and the screw (F) from the

left side of the printer.

Repair information 4-7

5060-00x

7. Remove the flag retainer (G) from the top cover.

8. Under the top cover, unclip the bin full sensor (H). Tilt the sensor and lower it through the top cover.

9. Remove the upper option autoconnect (I).

10. Remove the top cover.

4-8 Service Manual

5060-00x

Rear fancoverremoval

See “Rear fan cover”on page 7-5for the partnumber.

1. Removethe rear cover.See “Rear cover removal”on page4-8.

2. Removethe rear fan cover screwtype “323” (A)and removethe rear fan cover.

Rearcover removal

See “Rear cover” on page 7-5for the partnumber.

1. Remove the rear cover screw type“323” (A).

2. Open the MPF,removethe rear coverscrewtype “323” (B),and remove the rear cover.

A(323) B(323)

Repair information 4-9

5060-00x

Front right handle cover assembly removal

See “Front right handle cover assembly” on page 7-3 for the part number.

1. Open the front cover.

2. Remove the light shield screw type “324” (A) and screw type “323” (B) and release tab (C) from the frame

slot.

3. Remove the light shield.

4. Remove the front right handle cover assembly screw type “323” (C) and remove the assembly.

C(323)

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