Lexmark C736 Service Manual

Diagnostic aids3-45
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5.Reinsert tray 1.
6.Press Select ().
240 paper jam
If paper is jammed in Tray 1, 241.xx Paper jam appears. If paper is jammed in any of the optional trays, 24x.xx 
Paper jam appears. 
•If the jammed paper is located in tray 1, follow these steps to remove the paper from tray 1.
1.Open tray 1, and pull the jammed pages straight up and out.
2.If the jam is located in front of the tray, pull the jammed pages up and out.
3.After removing the tray, the front...

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250 paper jam
If paper is jammed in the multipurpose tray, 250.xx Paper jam appears.
1.Press the paper release lever, and then remove the jammed pages from the multipurpose tray.
2.Load new paper into the multipurpose tray.
3.Press Select (). 

Repair information4-1
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4.  Repair information
Safety information
•The safety of this product is based on testing and approvals of the original design and specific 
components. The manufacturer is not responsible for safety in the event of use of unauthorized 
replacement parts. 
•The maintenance information for this product has been prepared for use by a professional service person 
and is not intended to be used by others.
•CAUTION: When you see this symbol, there is a danger...

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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, follow the instructions below in addition to all the usual precautions, such as 
turning off power before removing electronic cards:
•Keep the ESD-sensitive part in its original shipping container (a special “ESD bag”) until you are 
ready to install the part in the printer.
•Make the...

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Screw and retainer identification table
The following table contains screw types and retainers, 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.
Sizes are as close to actual as possible, as long as the printout is not scaled or resized.
Screw identification table
P/N Screw type Location Qty...

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18B0832
(Cont.)Taptite M3 L6 
panheadLaser support plate to lower plate 2
Left camshaft lock assembly to printer frame 2
Left frame assembly to laser support plate 2
Left frame assembly to lower plate 4
Lower plate to left frame assembly 2
LVPS support plate to right plate 4
LVPS to right frame plate and support bracket 5
Motor driver card to EP drive assembly 2
MPF driver cover to right frame 3
Right camshaft lock assembly to printer frame 2
Right frame...

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27S2837 M3.5X1.34 panhead 
8L, blackLeft cover to lower frame 2
Rear left cover through lower swingout frame into left cover 1
Rear right cover to rear upper cover 1
Rear upper cover to top cover 1
Top cover to right cover 1
27S2838 Machine M3X0.5–
6GLContacts assembly to left/front edge of printer frame 2
Fax modem blank plate to left plate 1
ISP blank plate to left plate 2
Second USB connector to left frame 1
System board USB connector to frame 1
USB-A...

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88A0293 Plastite M2.2 L5 Contact spring cap to left guide assembly 4
88A0312 Plastite M2.9 L6 
PANBackup springs to reference edge plate assembly 2
Cartridge cooling fan duct to top cover 2
Cartridge left guide assembly to leftside plate assembly (exterior side of plate 
assembly)4
Cover mount to rightside plate 3
Display detent spring to display back bezel 1
Door straps to front access door cover 2
Door bracket to front access door cover 2
Duplex entry...

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88A0412 M2.9x5.2 Plastite GS COD bellcranks to guide 3
NGS COD bellcranks to guide 3
Top access door assembly to fuser retract link 1
Top cover left link to cover 1 Screw identification table (continued)
P/N Screw type Location Qty 

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Adjustments
Printhead alignment
Overview
When aligning the printhead, it is important to keep in mind that the printhead mounting screws should be initially 
loose enough to just hold the printhead in the printer. This allows the pages to be printed that will be used to 
align the black plane to the printer frame and also allows skew adjustment with the printhead alignment screw. 
Once the black skew is adjusted, the mounting screws are fully tightened....