Lexmark C 950 Service Manual

							Diagnostic aids 3-19
  5058-030
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To perform the Button Test:
1.From the Diagnostics Menu, navigate to HARDWARE TESTS.
2.Select Button Test. The LCD displays a graphic of the operator panel buttons that matches the layout of 
the operator panel buttons.
3.Press any button on the operator panel. Every time a button is pressed, the equivalent button graphic on 
the LCD appears shaded. When the button is released, the shading is removed.
DRAM Test
The DRAM Test is used to check the validity of both the device’s standard and optional DRAM. The test involves 
writing patterns of data to DRAM to verify that each bit in memory can be set and read correctly.
To run the DRAM Test:
1.From the Diagnostics Menu, navigate to HARDWARE TESTS.
2.Select DRAM Test. DRAM Test Testing... appears on the LCD, and then Resetting the Printer appears. 
The printer automatically performs a POR. 
The following type of message appears:
•P:###### represents the number of times the memory test has passed and finished successfully. 
Initially 000000 displays with the maximum pass count being 999,999.
•F:##### represents the number of times the memory test has failed and finished with errors. Initially 
0000 displays with the maximum fail count being 99,999. Initially only four digits appear, but 
additional digits appear as needed.
To stop this test before completion, turn the printer off.
Panel Test
After a user chooses this setting, the device automatically executes the operator panel test application which 
occupies the entire display panel. The test application automatically toggles each pixel in the display panel 
through every contrast level, beginning with the darkest (every pixel turned on and as dark as possible) and 
ending with the lightest (every pixel turned off). The panel then illuminates the backlight, and then it turns off.
Essentially, this test identifies any non-functioning pixels, since these appear as blank spaces during the test’s 
darker stages.
This test is run by navigating to HARDWARE TESTS and then selecting Panel Test. 
Serial Wrap 1 Test
The Serial Wrap Test is used to check the operation of the serial port hardware using a wrap plug. Each serial 
signal is tested.
INPUT TRAY TESTS
Feed Tests (Input Tray)
This test is used to observe the paper path of media as it passes through the printer. To observe the paper path, 
a user can open the upper rear door while this test executes. No information is printed on the feed test pages 
since the printhead LED isn’t engaged during this test.DRAM Test 256MB P:###### F:#### 
						

							3-20  Service Manual 5058-030  
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To run this test:
1.From the Diagnostics Menu, navigate to INPUT TRAY TESTS.
2.Select the appropriate input source from the following choices: 
•Tray 1
•Tray 2
•Tray 3
•Tray 4
•Multi-Purpose Feeder
3.Touch either Single or Continuous. 
•Single—Feeds one sheet of media from the selected source.
•Continuous—Media continues feeding from the selected source until Stop is pressed.
MOTOR TESTS
PRINTER MOTOR TESTS
To run these tests:
1.From the Diagnostics Menu, navigate to MOTOR TESTS.
2.Select PRINTER MOTOR TESTS.
3.Select the test from the following options:
• Fuser/lower redrive/1st transfer 
retract motor• Printer transport motor
• Registration motor• HCF feed/lift motor (feed)
• Tray 1 feed/lift motor (feed)• HCF feed/lift motor (lift)
• Tray 1 feed/lift motor (lift)• HCF transport motor
• Tray 2 feed/lift motor (feed)• KCMY drum & transfer belt motor
• Tray 2 feed/lift motor (lift)• Y erase lamp
• Tray 3 feed/lift motor (feed)• M erase lamp
• Tray 3 feed/lift motor (lift)• C erase lamp
• Tray 4 feed/lift motor (feed)• K erase lamp
• Tray 4 feed/lift motor (lift)• Waste toner agitator motor
• MPF feed/lift motor (feed)• Image density sensor shutter open
• MPF feed/lift motor (pick)• Image density sensor shutter close
• Registration clutch• Y toner dispense motor
• Upper redrive diverter• M toner dispense motor
• Duplex motor (reverse)• C toner dispense motor
• Upper redrive motor (forward)• K toner dispense motor
• Upper redrive motor (reverse)• Developer motor
• Lower redrive shift motor (forward)• Transfer belt motor
• Lower redrive shift motor (reverse)• 1st transfer rollers retract motor (contacted)
• Upper redrive shift motor (forward)• 1st transfer rollers retract motor (retracted)
• Upper redrive shift motor (reverse)• 2nd transfer rollers retract motor (contacted)
• 1TM/3TM/TTM upper transport 
motor• 2nd transfer rollers retract motor (retracted)
• 1TM/3TM/TTM lower transport 
motor 
						

							Diagnostic aids 3-21
  5058-030
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FINISHER MOTOR TESTS
To run these tests:
1.From the Diagnostics Menu, navigate to MOTOR TESTS.
2.Select FINISHER MOTOR TESTS.
3.Select the test from the following options:
OUTPUT BIN TESTS
Feed Tests (Output Bin)
This test is used to verify that media from the device’s default input source can be fed to a specific output bin. No 
information is printed on the feed test pages.
To run the Feed Tests for the output bins:
1. From the Diagnostics Menu, navigate to OUTPUT BIN TESTS.
2. Touch Feed Tests.
3. Touch the output bin you want the paper to exit into. The standard bin as well as any output option bin 
installed on the printer is shown on the menu. 
•Standard Bin
•Output Bin [1-3]
4.Touch either Single or Continuous. 
•Single—Feeds one sheet of media from the selected source.
•Continuous—Media continues feeding from the selected source until Stop is pressed.
Press Stop to return to the [Selected Output Bin]. Available tests:
• Buffer/transport motor• Punch carriage shift motor (forward)
• Entrance/paddle motor• Punch carriage shift motor (rearward)
• Exit motor• Punch unit motor 
• Finisher diverter gate solenoid 
(upper bin)• Bridge unit motor
• Finisher diverter gate solenoid 
(stacker bin)• Decurler cam clutch
• Sub paddle solenoid• Booklet folding/exit motor (forward)
• Buffer diverter gate solenoid• Booklet folding/exit motor (reverse)
• Front tamper motor (forward)• Booklet knife solenoid
• Front tamper motor (rearward)• Booklet end guide motor (down)
• Rear tamper motor (forward)• Booklet stapler motor
• Rear tamper motor (rearward)• Booklet bin motor
• Stapler carriage motor (forward)• Booklet paddle motor
• Stapler carriage motor (rearward)• Booklet tamper front motor (reverse)
• Media eject clutch• Booklet tamper front motor (forward)
• Media eject clamp motor (unclamp)• Booklet tamper rear motor (forward)
• Media eject clamp motor (clamp)• Booklet tamper rear motor (reverse)
• Media eject motor (forward)• Booklet entrance motor
• Media eject motor (reverse)• Booklet diverter gate solenoid (bin)
• Stacker bin lift motor (up)• Booklet diverter gate solenoid (booklet)
• Stacker bin lift motor (down)• 
						

							3-22  Service Manual 5058-030  
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While this test runs, [Selected Output Bin] Feeding...appears on the LCD. During Single tests, no buttons are 
active. However, during Continuous tests, you can press Stop to cancel the test.
Feed To All Bins
This test is used to verify that the device can feed media to all installed output destinations. No information is 
printed on the feed test pages since the printhead LED is not engaged during this test.
PRINT TESTS
This menu’s settings enable a user to test the device’s ability to generate printed output from each of its installed 
input sources and to test the device’s current print quality.
[Input Source] Print Test
After a user selects an input source to test, the panel displays two testing options: Single or Continuous. A 
Single test feeds one sheet of media from the selected input and prints a test page on it; the Continuous test 
continuously feeds media from the selected input and prints test pages until the user presses Stop. During a 
Single test, none of the panel’s buttons are active while the test page prints.
To run this test:
1.From the Diagnostics Menu, navigate to PRINT TESTS.
2.Select the input source from the following choices: 
•Tray 1
•Tray 2
•Tray 3
•Tray 4
•Multi-Purpose Feeder)
3.Touch either Single or Continuous. 
•Single—Feeds one sheet of media from the selected source.
•Continuous—Media continues feeding from the selected source until Stop is pressed.
Print Quality Pages (Diagnostics Menu)
This setting enables a user to view the values of a broad range of the device’s settings and to test the device’s 
ability to generate acceptable printed output.
PRINTER SETUP
Configuration ID
This setting enables a user to change both Configuration ID 1 and Configuration ID 2.
Mono and Color Page Count
The values of these settings enable a user to gauge the amount and type of usage on a device. The Mono Page 
Count setting’s value will equal the value of the Picked Sides meter. The Color Page Count setting’s value will 
equal the value of the Total Color sub-meter within the Imaged Printed Sides meter.
Parallel Strobe Adjustment (all parallel ports)
This setting enables the user to adjust the amount of time the strobe is sampled in order to determine if valid 
data is available on the parallel port. Each time this value is incremented by 1, the strobe is sampled 50 
nanoseconds longer. Each time this value is decreased by 1, the strobe is sampled 50 nanoseconds less. When 
the value of this setting is 0, the factory default value is used to determine the length of time the strobe is 
sampled. 
						

							Diagnostic aids 3-23
  5058-030
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To change this setting:
1.From the Diagnostics Menu, navigate to PRINTER SETUP.
2.Select Par 1 Strobe Adj.
3.Touch  or  to change the value.
4.Touch Submit to save the setting, or touch Back to return to the Diagnostics Menu without saving any 
changes.
Permanent Page Count
The value of this setting indicates the total number of pages that have been printed by the device.
Reset Color Calibration
This setting enables the device to adjust the alignment of its color planes using pre-programmed default values. 
Using this setting to adjust color plane linearization may not provide a calibration as effective as using Automatic 
Color Adjust Calibration. While this text executes, the panel posts Resetting. 
Serial Number
This setting records the device’s 13-character (last character is a null value) serial number that was assigned by 
manufacturing.
U.S. / Non-U.S. Defaults
The value of this setting determines whether the device uses the U.S. or Non-U.S. factory default value.
To change this setting:
1.From the Diagnostics Menu, navigate to PRINTER SETUP.
2.Select Defaults.
3.Touch  or  to change the value.
4.Touch Submit to save the setting, or touch Back to return to the Diagnostics Menu without saving any 
changes.
REPORTS
This menu contains informational reports that are helpful when servicing a device.
The Menu Settings Page report generates a list of the Diagnostic Menu settings and each setting’s current 
value.
SENSOR TESTS
PRINTER SENSOR TESTS
This test verifies that the sensors in the base machine are operating properly.
To run these tests:
1.From the Diagnostics Menu, navigate to SENSOR TESTS.
2.Select PRINTER SENSOR TESTS.
3.Select the test from the following options:
Available tests:
• Sensor (transparency detect)• Sensor (MPF media level)
• Sensor (transfer belt HP)• Sensor (upper redrive) 
						

							3-24  Service Manual 5058-030  
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FINISHER SENSOR TESTS
This test verifies that the sensors in the finisher are operating properly.
To run these tests:
1.From the Diagnostics Menu, navigate to SENSOR TESTS.
2.Select FINISHER SENSOR TESTS.
3.Select the test from the following options:
• Sensor (tray 1 media out)• Sensor (fuser exit)
• Sensor (tray 1 media level)• Sensor (paper on belt)
• Sensor (tray 1 media size switch)• Sensor (registration)
• Sensor (tray 1 pre feed)• Sensor (MPF feed out)
• Sensor (tray 2 media out)• Sensor (duplex wait)
• Sensor (tray 2 media level)• Sensor (lower redrive shift HP)
• Sensor (tray 2 feed out)• Sensor (upper redrive shift HP)
• Sensor (tray 2 media size)• Sensor (standard bin 1 media full)
• Sensor (tray 3 media out)• Sensor (standard bin 2 media full)
• Sensor (tray 3 media level)• Sensor (printer left door interlock)
• Sensor (tray 3 feed out)• Sensor (upper redrive door interlock)
• Sensor (tray 3 media size)• Sensor (printer front door interlock)
• Sensor (tray 3 pre feed) TTM only• Sensor (duplex door interlock)
• Sensor (tray 4 media out)• Sensor (tray module left door interlock)
• Sensor (tray 4 media level)• Sensor (waste toner bottle present)
• Sensor (tray 4 feed out)• Sensor (waste toner bottle full)
• Sensor (tray 4 media size)• Sensor (1st transfer rolls retract HP)
• Sensor (tray 4 pre feed) TTM only• Sensor (2nd transfer roll retract HP)
• Sensor (MPF media out)
Available tests:
• Sensor (booklet knife HP)• Sensor (rear tamper HP)
• Sensor (booklet compiler media 
present)• Sensor (stapler carriage HP)
• Sensor (booklet media exit)• Sensor (staple low)
• Sensor (booklet unit interlock)• Sensor (staple self priming)
• Sensor (booklet front staple low)• Sensor (staple motor HP)
• Sensor (booklet rear staple low)• Sensor (media eject clamp HP)
• Sensor (booklet bin media present)• Sensor (media eject shaft HP)
• Sensor (booklet front tamper HP)• Sensor (stacker bin upper limit)
• Sensor (booklet media entracne)• Sensor (stacker bin no media)
• Sensor (booklet rear tamper HP)• Sensor (stacker bin level encoder)
• Sensor (booklet end guide HP)• Sensor (stacker bin level 1)
• Sensor (booklet knife folding)• Sensor (stacker bin level 2)
• Sensor (finisher media entrance)• Sensor (punch carriage shift HP)
• Sensor (buffer path)• Sensor (punch cam HP)
Available tests: 
						

							Diagnostic aids 3-25
  5058-030
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• Sensor (diverter gate)• Sensor (punch cam front)
• Sensor (upper media exit)• Sensor (punch cam hole select)
• Sensor (lower media exit)• Sensor (punch unit motor encoder)
• Sensor (compiler media present)• Sensor (punch waste box set)
• Sensor (bridge media entrance)• Sensor (bridge bin exit)
• Sensor (bridge media exit)• Sensor (deculer cam HP)
• Sensor (punch side reg 1)• Sensor (eject cover interlock)
• Sensor (punch side reg 2)• Sensor (finisher front door interlock)
• Sensor (upper media bin full)• Sensor (bridge top door interlock)
• Sensor (front tamper HP)
Available tests: 
						

							3-26  Service Manual 5058-030  
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Service Engineer (SE) Menu
Print SE Menus
General
Copyright—Displays copyright information
Optra Forms mode—On or off
Code Revision Info
Network Code Level—Displays network code level
Network Compile Info—Displays compile information
Printer Code Level —Displays printer code information
Printer Compile Info—Displays compile information
History
Print History
Mark History
History Mode
MAC
Set Card Speed
Set LAA
Keep Alive
NVRAM
Dump NVRAM
Reinit NVRAM
NPAP
Print Alerts
TCP/IP
netstat -r
arp -a
Allow SNMP Set
Set MTU
Meditech Mode
Raw LPR Mode
Gather Debug
Enable Debug 
						

							Diagnostic aids 3-27
  5058-030
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Paper jams
Avoiding jams
Paper tray recommendations
•Make sure the paper lies flat in the tray.
•Do not remove a tray while the printer is printing.
•Do not load a tray while the printer is printing. Load it prior to printing, or wait for a prompt to 
load it.
•Do not load too much paper. Make sure the stack height does not exceed the indicated 
maximum height.
•Make sure the guides in the tray or the multipurpose feeder are properly positioned and are 
not pressing too tightly against the paper or envelopes.
•Push the tray in firmly after loading paper.
Paper recommendations
•Use only recommended paper or specialty media.
•Do not load wrinkled, creased, damp, bent, or curled paper.
•Flex and straighten paper before loading it.
•Do not use paper that has been cut or trimmed by hand.
•Do not mix paper sizes, weights, or types in the same stack.
•Make sure all sizes and types are set correctly in the printer control panel menus.
•Store paper per manufacturer recommendations. 
						

							3-28  Service Manual 5058-030  
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Understanding jam numbers and locations
When a jam occurs, a message indicating the jam location appears on the display. Open doors and covers and 
remove trays to access jam locations. To resolve any paper jam message, you must clear all jammed paper 
from the paper path.
# Area nameError 
codeInstructions Go to page
1 Cover F 281
4yy.xxOpen cover F, and then remove the jammed paper.3-41, 
3-44
2 Door G 455
4yy.xxOpen door G, and then remove the jammed paper.
For staple jams, remove the staple cartridge, and then 
clear the staple jam.3-48,
3-44
3 Door H 4yy.xx Open door H, and then remove the jammed paper.3-44
4 Standard exit bin 201-202
203Remove all paper from the standard exit bin, and then 
remove the jammed paper.3-29, 
3-31
5 Door C
Tray [x]24x Open door C, and then remove the jammed paper.
Open each tray, and then remove any jams.3-35
6 Multipurpose 
feeder250 Remove all paper from the multipurpose feeder, and 
then remove the jammed paper.3-41
7 Door B 230 Open door B, and then remove the jammed paper.3-32
8 Door A 201-202
231
281Open door A, and then remove the jammed paper.3-29, 
3-33,
3-41
9 Door D 203 Open door A, and then door D, and then remove the 
jammed paper.3-31
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