Lexmark C736 Service Manual

							Diagnostic information2-5
  5026
Go Back Previous
Next
Symptom tables
Printer symptom table
Print quality symptom table
Symptom Action
Dead printer Go to “Dead printer service check” on page 2-126.
Operator panel—one or more buttons do 
not work.Go to “One or more operator panel buttons fail” on 
page 2-131.
Operator panel—display is blank. Printer 
sounds five beeps.Go to “Operator panel display blank, five beeps, and LED is 
off” on page 2-131.
Operator panel—display is blank.  Go to “Operator panel display blank, five beeps, LED on” on 
page 2-131.
Operator panel continuously displays all 
diamonds and does not complete POST.Go to “Operator panel display all diamonds, no beeps” on 
page 2-132.
Tray linking will not work. Go to “Tray linking service check” on page 2-140.
Front cover locks, and will not open Go to “Front cover locked in place.
Symptom Action
Background Go to “Print quality—background” on page 2-133.
Blank page Go to “Print quality—blank page” on page 2-134.
Blurred or fuzzy print Go to “Print quality—blurred or fuzzy print” on page 2-136.
Half-color page Go to “Print quality—half-color page” on page 2-136.
Horizontal banding Go to “Print quality—horizontal banding” on page 2-136.
Horizontal line Go to “Print quality—horizontal line” on page 2-136.
Insufficient fusing Go to “Print quality—insufficient fusing” on page 2-136.
Missing image at edge Go to “Print quality—missing image at edge” on page 2-136.
Mottle (2–5mm speckles) Go to “Print quality—mottle (2–5mm speckles)” on 
page 2-136.
Narrow vertical line Go to “Print quality—narrow vertical line” on page 2-136.
Random marks Go to “Print quality—random marks” on page 2-137.
Residual image Go to “Print quality—residual image” on page 2-137.
Solid color page Go to “Print quality—solid color page” on page 2-138.
Vertical banding Go to “Print quality—vertical banding” on page 2-139.
White gapping Go to “Print quality—white gapping” on page 2-139. 
						

							2-6Service Manual 5026  
Go Back Previous
Next
User status and attendance messages
Error code   Action 
Close Front Door Close the front door securely. If you continuously get this error, then either the 24 V interlock 
switch or the 5 V interlock switch is bad. See “24 V interlock switch service check” on 
page 2-123 and “5 V interlock switch service check” on page 2-121.
Disk Corrupted, 
Reformat?The printer has attempted a disk recovery and cannot repair the disk. The disk must be 
formatted to use.
Warning: All files stored on the disk will be lost.
Held Jobs May Not Be 
RestoredThe printer has attempted to restore Held jobs, but not all were restored.
Insert Tray  Insert tray to clear the message.
Load 
Load paper in the indicated source and of the indicated type. Additional messages may 
include:
• Paper loaded—Select Continue.
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be canceled.
• Wait for supplies—If job parking is enabled, and the job meets all the requirements for 
allowing the job to be parted, the printer adds this message.
Load  
Load paper in the indicated source, and select Continue.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled.
• Wait for supplies—If job parking is enabled, and the job meets all the requirements for 
allowing the job to be parted, the printer adds this message.
Load   Load paper in the indicated source and of the indicated size, and select Continue.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled.
• Wait for supplies—If job parking is enabled, and the job meets all the requirements for 
allowing the job to be parted, the printer adds this message.
Load Manual If paper loaded is in the manual feeder, the job continues. If paper is not in the feeder, 
pressing Select indicates to the printer it should search for a source with the proper custom 
type.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled.
Load Manual 
If paper loaded is in the manual feeder, the job continues. If paper is not in the feeder, 
pressing Select indicates to the printer it should search for a source with the proper custom 
string.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled.
Load Manual  If paper loaded is in the manual feeder, the job continues. If paper is not in the feeder, 
pressing Select indicates to the printer it should search for a source with the proper size.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled. 
						

							Diagnostic information2-7
  5026
Go Back Previous
Next
Load Manual  
If paper loaded is in the manual feeder, the job continues. If paper is not in the feeder, 
pressing Select indicates to the printer it should search for a source with the proper type and 
size.
Additional messages may include:
• Show Me—the printer will present instructions.
• Cancel Job—the printer job can be cancelled.
Paper Changes Needed
PC Unit Exposure 
WarningThis warning occurs when the front door is left open too long. Close the front door to prevent 
damage to the PC unit. Select Tell me more for further information.
Remove All Color 
SuppliesIf Color Lockout mode is enabled, this message appears (unless the printer is in Diagnostics 
Menu or Configuration Menu).
Remove Paper 
Standard BinThe standard output bin is full. Remove the media to continue.
Remove Packaging 
MaterialIf packaging material is detected by the printer, Check all areas, Check , or 
Check  areas may appear. Press Select to continue.
Restore Held Jobs
Go/Stop?If the printer detects Print and Hold (or parked) jobs stored on the hard disk during Power-On 
Self Test (POST). Choices are:
• Restore—Print jobs are restored, and Restoring Held Jobs x/y, where x is the number 
of the job restored and y is the total number of jobs to restore. You can quit restoring, and 
the remainder of the jobs will remain on the disk, but cannot be accessed until they are 
restored at the next POR.
• Do not restore—Held jobs will remain on the disk, but cannot be accessed until they are 
restored at the next POR. Held jobs may not be restored appears.
• Tell me more—additional information is available
Securely Clearing Disk 
SpaceDisk wiping process is recovering disk space. The message clears when all memory blocks 
are cleared.
Tray Length Guide 
MissingReplace the tray length guide.
Unsupported USB 
device, Please RemoveRemove the unrecognized device to continue.
Unsupported USB hub, 
Please RemoveRemove the unrecognized device to continue.
Unsupported Mode Unplug camera and change it to a mode where the camera can access PictBridge. Plug the 
camera back in to continue.
Unsupported Disk Remove the unsupported disk to continue. Error code   Action  
						

							2-8Service Manual 5026  
Go Back Previous
Next
3x through 8x attendance messages
31 Defective or Missing 
 Cartridge• Reseat the specified toner cartridge.
• Inspect the smart chip card contacts (A) for damage, contamination or positioning error. If 
damaged, contact your next level of service.
• Inspect the toner cartridge contacts for damage/contamination. Replace the toner 
cartridge if defective.
• Inspect the JSBTN1 cable connection. Properly connect the cable if not connected 
properly. Replace the cable if damaged. 
• Replace the indicated cartridge.
• If the problem still exists, replace the system board. See “System board removal” on 
page 4-153.
32 Unsupported 
Cartridge• Check to see if the toner cartridge is a supported cartridge. 
Note: Once the cartridge shipped with the printer is exhausted, it must be replaced by a 
supply cartridge (refer to the User’s Guide for part numbers.)
If the specified toner cartridge is a supported cartridge, reseat the cartridge.
• Inspect the toner cartridge contacts for damage or contamination. Replace the toner 
cartridge if defective.
• Inspect JSBTN1 cable connection. Properly connect the cable if not connected properly. 
Replace the cable if damaged. 
• If the problem still exists, replace the system board. See “System board removal” on 
page 4-153.
34 Short Paper • Select Continue to clear the message and continue printing.
Note: The printer does not automatically reprint the page that prompted the message.
• Check the tray length and width guides to ensure the media is properly fitted.
• Make sure the print job is requesting the correct size of media.
• Adjust the Paper Size setting for the media size being used.
• If the MP Feeder Size is set to Universal, make sure the media is large enough for the 
formatted data.
• Cancel the current job. Replace the paper pick mechanism. See “Paper pick 
mechanism assembly removal” on page 4-127.
• If the problem still exists, replace the system board. See “System board removal” on 
page 4-153.
35 Insufficient memory 
to support Resource 
Save feature• Select Continue to disable Resource Save and continue printing.
• To enable Resource Save after receiving this message:
- Make sure the link buffers are set to Auto, then exit the menus to activate the link 
buffer changes. 
- When Ready is displayed, enable Resource Save.
• Install additional memory.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153. Error code   Action 
A 
						

							Diagnostic information2-9
  5026
Go Back Previous
Next
37 Insufficient memory 
to collate job• Select Continue to print the portion of the job already stored and begin collating the rest 
of the job.
• Cancel the current job.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
37 Insufficient memory 
for Flash Memory 
Defragment operation• Select Continue to stop the defragment operation and continue printing.
• Delete fonts, macros, and other data in printer memory.
• Install additional printer memory.
• If this does not fix the problem, replace the system. See “System board removal” on 
page 4-153.
37 Insufficient memory, 
Some Held Jobs Were 
Not Restored• The printer deleted some held jobs in order to process current jobs.
• Select Continue to clear the message.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
37 Insufficient memory, 
Some Held Jobs Will 
Not Be Restored• The printer was unable to restore some or all of the confidential or held jobs on the hard 
disk.
• Select Continue to clear the message.
• If this message occurs again, replace the hard drive.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
37 Insufficient Defrag 
MemoryThere is insufficient memory to perform the Flash Memory Defragment operation. The user 
can: 
• Delete font, macros, and other data in memory.
• Install additional printer memory.
38 Memory Full The following options are available:
• Select Continue to clear the message and continue printing. The job may not print 
correctly.
• Cancel the current job.
• Install additional printer memory.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
39 Complex Page The page is too complex to print. Options are:
• Select Continue to continue. The job may not print correctly.
• Cancel the job.
50 PPDS Font Error • Select Continue to clear the message and continue printing. The job may not print 
correctly.
• Cancel the current job.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
51 Defective Flash • Select Continue to clear the message and continue printing.
• Install different flash memory before downloading any resources to flash.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
52 Flash Full • Select Continue to clear the message and continue printing.
Note: Downloaded fonts and macros not previously stored in flash memory are deleted.
• Delete fonts, macros, and other data stored in flash memory.
• Install a larger capacity flash memory card.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153. Error code   Action  
						

							2-10Service Manual 5026  
Go Back Previous
Next
53 Unformatted Flash  • Select Continue to clear the message and continue printing.
• Format the flash memory before storing any resources on it. If the error message 
remains, replace the flash memory.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
54 Serial option  
error• Make sure the serial link is set up correctly and the appropriate cable is in use.
• Make sure the serial interface parameters (protocol, baud, parity, and data bits) are set 
correctly on the printer and host computer.
• Select Continue to clear the message and continue printing.
The job may not print correctly.
• POR the printer. If this does not fix the problem, replace the PCI card. 
54 Std Network
Software Error• Select Continue to clear the message and continue printing. The job may not print 
correctly.
• Program new firmware for the network interface.
• POR the printer. If this does not fix the problem, replace the PCI card. 
55 Unsupported Option 
in Slot 1. Turn the printer off.
2. Unplug the power cord from the wall outlet.
3. Remove the unsupported option.
4. Connect the power cord to a properly grounded outlet.
5. Turn the printer on.
If this does not fix the problem, replace the system board. See “System board removal” on 
page 4-153.
56 Standard Parallel 
Port Disabled• Select Continue to clear the message. The printer discards any data received through 
the parallel port.
• Make sure the Parallel Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the PCI card. 
56 Parallel Port  
Disabled• Select Continue to clear the message. The printer discards any data received through 
the parallel port.
• Make sure the Parallel Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the PCI card. 
56 Serial Port  
Disabled• Select Continue to clear the message. The printer discards any data received through 
the serial port.
• Make sure the Serial Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the PCI card. 
56 Standard USB Port 
Disabled• Select Continue to clear the message.
The printer discards any data received through the USB port.
• Make sure the USB Buffer menu item is not set to Disabled.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
57 Configuration 
Change
Held Jobs May Not 
Be Restored
See Configuration 
Change, above - not in 
IR as 57Configuration changes may be:
• Code version changes
• Paper handling options removed
• The disk was installed from a different model or speed of printer. Error code   Action  
						

							Diagnostic information2-11
  5026
Go Back Previous
Next
58 Too Many Flash 
OptionsToo many flash options are installed. To continue:
1. Turn off and unplug the printer.
2. Remove the excess flash memory.
3. Plug in the printer, and turn it on.
If this does not fix the problem, replace the system board. See “System board removal” on 
page 4-153.
58 Too Many Trays 
Attached1. Turn off and unplug the printer.
2. Remove options until the supported number of options for that model. Models C734 
supports three options and models C736 supports four options.
3. Plug in the printer, and turn it on.
If this does not fix the problem, replace the system board. See “System board removal” on 
page 4-153.
59 Incompatible Tray 
There is an incompatible tray. To remove the option:
1. Turn off and unplug the printer.
2. Remove all option trays.
3. Install one option, plug in the printer and turn it on. 
4. Continue adding one option at a time and checking whether the error occurs.
5. Install all options except the one identified as a problem.
- If no problem occurs, replace the option.
- If the same error occurs, replace the system board.
6. Plug in and power on
61 Defective Disk • Select Continue to clear the message and continue printing.
• Install a different hard disk before performing any operations that require a hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
62 Disk full • Select Continue to clear the message and continue processing.
• Any information not previously stored on the hard disk is deleted.
• Delete fonts, macros, and other data stored on the hard disk.
• Install a larger hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
63 Unformatted disk • Select Continue to clear the message and continue printing.
• Format the disk.
• If the error message remains, replace the hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
64 Unsupported disk 
format• Select Continue to clear the message and continue printing.
• Format the disk.
• If the error message remains, replace the hard disk.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
80 Fuser Near Life 
Warning• Select Continue to clear the message and continue printing.
•Show Me, View Supplies, and Tell Me More displays additional information.
• Order a replacement fuser. When print quality is reduced, install the new fuser using the 
instruction sheet that comes with the replacement fuser.
Note: Be sure to reset the fuser count. See “Reset Fuser Cnt” on page 3-25.
• If this does not fix the problem, replace the system board.See “System board removal” 
on page 4-153. Error code   Action  
						

							2-12Service Manual 5026  
Go Back Previous
Next
80 Fuser Life Warning • Select Continue to clear the message and continue printing.
•Show Me, View Supplies, and Tell Me More displays additional information.
• Order a replacement fuser. When print quality is reduced, install the new fuser using the 
instruction sheet that comes with the replacement fuser.
Note: Be sure to reset the fuser count. See “Reset Fuser Cnt” on page 3-25.
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
80 Replace Fuser •Show Me, View Supplies, and Tell Me More displays additional information.
• Replace the fuser. See “Fuser removal” on page 4-104.
Note: Be sure to reset the fuser count. See “Reset Fuser Cnt” on page 3-25.
•
• If this does not fix the problem, replace the system board. See “System board removal” 
on page 4-153.
80 Fuser Missing • Reinstall the fuser. See “Fuser removal” on page 4-104.
• Reseat connectors behind fuser. They may get dislodged and not make good contact 
when the fuser is installed.
• Check the cable connectors for damage at the system board and at the LVPS.
80.41 Fuser missing • Install the fuser. Replace the fuser if the problem persists.
• If the problem continues, turn the printer off and remove the rear frame cover. See “Rear 
frame cover removal” on page 4-33. Check the cable in connector JFUSER1 (A) for 
proper connection to the system board, the cable for pinch points, and the cable or the 
connector for any other damage. If the connector is damaged on system board, replace 
the system board. See “System board removal” on page 4-153. If the fuser cable is 
damaged, replace the cable.
• Check for the following continuity between the DC autoconnect and FUSER1. 
• If continuity is not present, replace the fuser cable. If the problem persists after replacing 
cable, replace the system board. See “System board removal” on page 4-153.
82 Waste Toner 
Nearly Full• Select Continue to clear the message and continue printing.
• If printing continues, order a replacement waste toner box immediately.
• If the problem persists, open the front access door and check the aligner shaft for binding. 
Clear the binding if possible. If not possible, contact your next level of service. Error code   Action 
1JSB1JBIN1
JFAN1JFUSER1 JFUSER1
JBOR1JHVPS1 JHVPS1
JMIRR1JBLW1
JCVR1
JLVPS2
JCARTP1
JCARTS1
JCARTS2
JCARTP2
JDVR1
JTPS1
JOPT1
JFDS1
JINT1
JFDPCK1JTRAY1JSEC1 JDX1
JT12 JT12J5 JDIMM1JOPP1
JT1
JUSB1 JUSB1 JBOOT1
JFMUSB1 JFMUSB1 J49
JTWF1
JTDBUG1
1111
11
1
11
1
1
1
1
1
1
1
1
1
11
1
1111
JTLBT1
JPH1
F5F6F7
F9
F10F12F13F14 F141
1J1011
A
AC auto-
connectDC auto-
connect
Pin 1 Pin 3
Pin 5 Pin 4
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10 
						

							Diagnostic information2-13
  5026
Go Back Previous
Next
82 Replace Waste 
Toner• Replace the waste toner box using the instruction sheet that comes with the replacement 
waste toner box.
• Ensure that there is no interference between the waste toner box and the printer. 
• If the problem persists, open the front access door and check the aligner shaft for binding. 
Clear the binding if possible. 
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153.
• If the problem persists, contact your next level of service.
82 Waste Toner Missing • Insert the waste toner box.
• Inspect the top cover camshaft assembly for proper operation. When the top access 
cover is closed, the printer should mechanically interlock.
• Check the cable in connector JBUMP1on the system board for defects and proper 
connection. If the cable wiring or the cable connection is defective, replace the bump 
multipurpose feeder/duplex motor assembly. See “Multipurpose feeder (MPF)/duplex 
motor assembly removal” on page 4-118. If the cable in JBUMP1 connector is 
damaged on the system board, replace the system board. See “System board removal” 
on page 4-153.
• Check the aligner shaft and the mechanical system for binds.
• Replace the bump multipurpose feeder/duplex motor assembly. See “Multipurpose 
feeder (MPF)/duplex motor assembly removal” on page 4-118.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153.
82.41 If you continuously get this error, then the problem is the aligner motor error. Go to “147.xx, 
920.01—POST (power-on self test) aligner error service check” on page 2-50. 
83.xx Transfer Module 
Life Warning• Select Continue to clear the message and continue printing.
• Order a replacement transfer module. When print quality is reduced, install the new 
transfer module using the instruction sheet that comes with the replacement transfer 
module.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153.
83.xx Replace Transfer 
Module• Replace the transfer module using the instruction sheet that comes with the replacement 
transfer module. See “Transfer module removal” on page 4-168.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153.
83.41 Transfer Module 
MissingIf the you continuously get this error, go to “920.03, 920.25—Transfer Module Missing 
error service check” on page 2-94.
84.11  PC Unit 
Life Warning• Select Ignore to clear the message and continue printing.
• Order the specified photoconductor unit. When print quality is reduced, install the new 
specified photoconductor unit using the instruction sheet that comes with the replacement 
specified photoconductor unit.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153.
84 Replace  PC 
Unit• Replace the specified photoconductor unit using the instruction sheet that comes with the 
replacement specified photoconductor unit.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153. Error code   Action  
						

							2-14Service Manual 5026  
Go Back Previous
Next
84  PC Unit 
Missing• Scroll down the operator panel to see if the printer is showing that all four of the PC units 
are missing. If so, check the HVPS cable between the system board and the HVPS. 
Ensure that the cable is not plugged in backwards on the HVPS. Disconnect and 
reconnect the cable to make sure there is good contact.
• Insert or reinstall the specified photoconductor unit and see if problem clears. See 
“Photoconductor unit removal” on page 4-132.
• Remove the top access cover assembly (see “Top access cover assembly removal” 
on page 4-40), and confirm that the camshaft follower (A) on the left side is not out of the 
groove (B). If the camshaft follower is out of the groove, raise the arm, use a screwdriver 
to ease the camshaft follower back into the groove. You need to press down to snap it 
into position. 
• Check the high voltage contacts path, especially the “finger” on the specified 
photoconductor unit (printer is shown with components removed for clarity).
• If the contacts are good, replace the HVPS. See “High-voltage power supply (HVPS) 
removal” on page 4-108.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153.
84  PC Unit Near 
Life Warning• Select Ignore to clear the message and continue printing.
• Order the specified photoconductor unit. When print quality is reduced, install the new 
specified photoconductor unit using the instruction sheet that comes with the replacement 
specified photoconductor unit.
• If the problem persists, replace the system board. See “System board removal” on 
page 4-153. Error code   Action 
A B
High voltage
contact pathHigh voltage
power supply
Finger