Lexmark Optra S 1620 Manual

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Serial Port Service Check
Run the“Serial Wrap Test” on page 3-12.
Note:The Serial Wrap Test is designed to check the serial port
hardware by using a wrap plug (P/N 1329048) and invoking the
Serial Post Diagnostic Test. The test helps isolate the printer from
the serial cable and host. The test provides failure information on the
display for approximately three seconds. If the test indicates a
problem, replace the controller board.
Toner Sensor Service Check
Service Tip: Check the print darkness MENU setting before
checking the toner sensor.
This service check is intended to be used when a 929 Service Error
displays.
FRU Action
1 Developer Drive Assembly Incorrect operation of the developer
drive assembly can cause the printer
to display a 929 error code (Toner
Sensor). Check the developer drive
assembly for correct installation, any
sign of worn, loose or broken parts.
2 Toner Sensor Cable Check the toner sensor assembly
cabletomakesureitisproperly
seated into the toner sensor. If
correct at both the sensor and
engine board (J10), check the
continuity of the cable. If incorrect,
replace the cable. 
						

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Transfer Roll Service Check
Service Tip: The transfer roll is 17.0 mm (.669 inch) diameter. Any
print quality problems such as lines that are spaced 17 mm apart
indicate you should check the transfer roll for damage, toner or
foreign material buildup.
Service Tip: The transfer roll assembly is part of the Maintenance Kit
for models 2450, 2455 and 3455 printers and is replaced when a 80
Scheduled Maintenance” message displays. Ask the customer if
they have replaced the transfer roll recently.
CAUTION:Make sure the printer is powered Off before making any
checks on the transfer roll or associated parts for personal safety
and to prevent damage to the printer.
3 Toner Sensor The toner sensor cable is part of the
front harness and part of connector
J10 on the engine board. Check the
voltage at J1-011. It reads
approximately +5 V dc. If incorrect,
replace the engine board. If correct,
check the voltage at J10-12. It reads
approximately +5 V dc with the
controller board removed from the
printer. If incorrect, replace the
engine board. If correct, replace the
toner sensor assembly. A bad
ground connection between J10-13
on the engine board and pin 3 on the
toner sensor results in a 929 service
error.
FRU Action
1 Transfer Roll Assembly Check the transfer roll for any signs
of toner buildup, surface damage to
the roll, oil or other contaminants on
the surface of the roll. Replace the
transfer roll as necessary. FRU Action 
						

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2 Left Transfer Arm Assembly Check the left transfer roll arm
assembly to make sure it is fastened
and locked in the down position. If
thearmisnotlockeddown,checkto
ensure the arm is not broken and will
lock into the EP frame correctly.
Check the left transfer arm assembly
spring for proper operation.
3 Right Transfer Arm
AssemblyCheck the right transfer arm
assembly to make sure it is fastened
and locked in the down position. If
thearmisnotlockeddown,checkto
make sure the arm is not broken and
will lock into the EP frame correctly.
Check the right transfer arm
assembly spring for proper
operation. For any background
problems, check to ensure the
contact to the HVPS board is correct
and that there is approximately 0
ohms resistance between the
transfer roll shaft and the HVPS
contact. If correct, go to“Print
Quality - Background” on page 2-96
4 HVPS - 917 Error Code Check the voltage at J10-3. The
voltage changes from +24 V dc with
the printer idle to 0 V dc when the
printer runs the print test. If the
voltage is incorrect, check the
continuity of line J10-3 in the front
cable harness to the HVPS. If there
is no continuity, replace the cable
harness. If there is continuity,
replace the HVPS. If the problem
continues, replace the engine board. FRU Action 
						

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3.Diagnostic Aids
This chapter explains the tests and procedures to identify printer
failures and verify repairs have corrected the problem.
To run the printer diagnostic tests described in this chapter, you
must put the printer in Diagnostic Mode.
Diagnostic Mode
To enter the Diagnostic Mode:
1. Turn the printer off.
2. Press and hold the Go and Return buttons.
3. Turn the printer on.
4. Release the buttons when Performing Self Test displays on
the operator panel.
The tests display on the operator panel in the order shown:
•Print Registration
•Print Tests
•Hardware Tests
•Duplex Tests (If installed)
•Input Tray Tests
•Output Bin Tests
•Base Sensor Tests
•Printer Setup
•Error Log
•EP Factory Defaults
Exiting the Diagnostics Mode
Select Exit Diagnostics to exit the Diagnostics Mode and return to
normal mode. 
						

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Device Tests
Quick Disk Test
This test performs a non-destructive read/write on one block per
track on the disk. The test reads one block on each track, saves the
data, and proceeds to write and read four test patterns to the bytes
in the block. If the block is good, the saved data is written back to the
disk.
ToruntheQuickDiskTest:
1. Select the Quick Disk Test from the Device Tests menu.
– The power indicator blinks while the test is in progress.
– “Quick Disk Test/Test Passed” message displays if the test
passes and the power indicator turns on solid.
– “Quick Disk Test/Test Failed” message displays if the test
failed and the power indicator turns on solid.
2. Press Go, Return, or Stop to return to the Device Tests menu.
Disk Test/Clean
WARNING:This test destroys all data on the disk and should not be
attempted on a good disk. Also note that this test may run
approximately 1 1/2 hours depending on the disk size.
To r u n t h e D i s k Te s t / C l e a n Te s t :
1. Select Disk Test/Clean from the Device Tests menu.
– Files will be lost/Go or Stop? message displays to warn the
user that all contents on the disk will be lost.
2. To exit the test immediately and return to the Device Tests
menu, press Return/Stop. To continue with the test, press Go.
– If go is selected, Disk Test/Clean/BAD:000000 00%
message displays. The screen updates periodically
indicating the percentage of test completed and the number
of bad blocks found.
3. The power indicator blinks during the test. The test can be
canceled anytime during the test by pressing Return/Stop.
– Once the test is complete, the power indicator turns on solid
and a message displays. 
						

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– “xxxx Bad Blocks/yyyyyy Usable” message displays if fewer
than 2000 bad blocks are detected. xxxx indicates the
number of bad blocks and yyyyyy indicates the number of
usable blocks.
– “xxxx Bad Blocks/Replace Disk” message displays if more
than 2000 bad blocks are detected. The disk cannot be
recovered because too many bad blocks exist on the disk.
4. Press Go or Return/Stop to return to the Device Tests menu.
Flash Test
This test causes the file system to write and read data on the flash to
test the flash.
WARNING:This test destroys all data on the flash because the
flash is reformatted at the end of the test.
To run the Flash Test:
1. Select Flash Test from the Device Tests menu.
– The power indicator blinks while the test is running.
– “Flash Test/Test Passed” message displays if the test passes
and the power indicator turns on solid.
– “Flash Test/Test Failed” message displays if the test fails and
the power indicator turns on solid.
2. Press Go or Return/Stop to return to the Device Tests menu.
Disabling Download Emulations
Error Code 964: Download Emulation CRC Failure. Checksum
failure detected in the emulation header or emulation file.
Error Code 965: Download Emulation Outdated. Time stamps
indicate the download emulation and RIP code are incompatible.
To help resolve Download Emulation problems the following steps
are necessary to instruct the printer to POR without activating any
download emulations.
To Disable the Download Emulation:
1. Turn the printer off.
2. Press and hold the Go and Menu buttons. 
						

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3. Turn the printer On and release the buttons once “Performing
Self Test” displays.
– Once the printer is idle, the emulation can be downloaded
again.
4. Program the download emulation into the code overlay SIMM
again.
5. If these steps do not resolve the problem, replace the code
overlay SIMM and download the emulation again.
Duplex Tests
Duplex Quick Test
This test is used to verify that the Duplex Option Top Margin is set
correctly. This test prints a duplexed version of the Quick Test Page
that can be used to adjust the Top Margin for the backside of the
duplexed page. You can run one duplexed page (Single) or continue
printing duplexed pages (Continues) until Return/Stop is pressed.
The paper you choose to print the page on should be either Letter or
A4.
To run the Duplex Quick Test:
1. Select Duplex Quick Test from the menu.
2. Select Single or Continuous.
– The single Duplex Quick test cannot be canceled.
The printer attempts to print the Quick Test Page from the default
paper source. If the default paper source only supports envelopes,
then the page is printed from Tray 1.
Check the Quick Test Page for the correct offset between the
placement of the first scan line on the front and back side of a
duplexed sheet.
If adjustment is necessary the Top Margin Offset must be adjusted
first. The range of the adjustment is -25 to +25. The Duplex Top
Margin Offset range is -20 to +20.
Adjustment of this setting lets you shift up or down the position of the
Top Margin. Changing this parameter by 1 unit moves the margin 
						

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1/100 inch. A positive offset moves the text down the page and
widens the top margin while a negative offset moves the text up the
page and narrows the top margin.
3. Press Return/Stop to exit the test.
Check the Top Margin Offset of the base printer.
Duplex Sensor Test
This test is used to determine whether or not the Duplex sensors
and switches are working correctly.
Select Sensor Test from the Duplex Tests menu.
Manually actuate each of the duplex sensors. When the sensor/
switch is closed, CL (closed) displays, when the sensor/switch is
open, OP (Open) displays.
Duplex input sensor
Duplex exit sensor
Duplex front cover switch (not installed on all duplex options)
Duplex rear door switch (not installed on all duplex options)
Press Return/Stop to exit the test.
Duplex Motor Test
This test lets you test the duplex unit’s paper feed drive system, and
verify that the power and velocity values are acceptable.
To run the Duplex Motor Test:
1. Select Motor Test from the Duplex Tests menu. The duplex
motor test continues to run until the printer is powered off.
– The power indicator blinks while the test is running.
– The duplexer runs the motor at a high speed and then a low
speed and takes an average of the power required for each
speed.
– After all the information is computed, the motor turns off. 
						

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The following appears on the printer display:
DUPLEX MOTOR AA
BB CC DD EE FF
To pass the test the following results must display:
AA = 00
BB = in the range of 20 through 3F inclusively (hex)
CC = in the range of 3A through 5D inclusively (hex)
DD = in the range of 11 through 1F inclusively (hex)
Ignore bytes EE and FF.
If the test fails, remove the drive belt from the duplex D.C. motor and
run the motor test again. For the duplex D.C. motor to pass the test
the following results must display:
AA = 00
BB = in the range of 29 through 3E inclusively (hex)
CC = in the range of 35 through 51 inclusively (hex)
DD = in the range of 0C through 13 inclusively (hex)
For the duplex drive system to pass the test the following results
must display:
AA = 00
BB = in the range of 29 through 3F inclusively (hex)
CC = in the range of 3A through 5D inclusively (hex)
DD = in the range of 11 through 1F inclusively (hex)
2. Press Return/Stop to exit the test. 
						

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Duplex Feed 1 Test
This test feeds a blank sheet of paper to the duplex paper stop
position 1.
To run the Duplex Feed 1 Test:
1. Select Duplex Feed 1 from the Duplex Test menu.
– The power indicator blinks while the paper is feeding.
– Duplex Feed 1/Feeding message displays while the paper
is feeding through the printer.
– “Duplex Feed 1/Clear Paper” message displays when the
paper reaches paper stop position 1 and the power indicator
turns on solid.
Duplex Feed 2 Test
This test feeds a blank sheet of paper to the duplex paper stop
position 2.
To run the Duplex Feed 2 Test:
1. Select Duplex Feed 2 from the Duplex Test menu.
– The power indicator blinks while the paper is feeding.
– Duplex Feed 2/Feeding message displays while the paper
is feeding through the printer.
– “Duplex Feed 2/Clear Paper” message displays when the
paper reaches the duplex paper stop position 2 and the
power indicator turns on solid.