Lexmark Optra S 1620 Manual

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Print Registration
The print registration range is as follows:
Bottom Margin: -20 to +20
Top Margin: -25 to +25
Left Margin: -25 to +25
Right Margin: -10 to +10
To set Print Registration:
1. Select Registration from the Diagnostic menu.
2. The Top margin sign/value pair blinks. This indicates it is the
margin value being changed.
3. To select the margin value to be changed press Select until the
margin value pair you want to change is blinking.
4. To change the margin value press either Menu> or 
						

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Printer Setup
Setting the Page Count
This lets the servicer change the page count from the diagnostic
menu. This is used whenever the engine board is replaced because
this board contains the printers NVRAM Memory where the page
count is stored.
To set the Page Count:
1. Select Page Count from the diagnostic menu.
– The current page count displays.
– The leftmost digit blinks, indicating it is the first digit to be
changed.
2. Press either Menu> or  or 
						

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Maintenance Page Count (2420/2450/2455/3455)
This counter is reset by the servicer after a “80 Scheduled
Maintenance” message displays (250K copies) and a maintenance
kit is installed.
To view the Maintenance Page Count:
1. Select Maintenance Count Value from the diagnostic menu.
2. Press Return to go to the previous menu.
To reset the Maintenance Page Count to zero:
1. Select Reset Maintenance Count. Pressing Select causes the
maintenance page counter to reset to zero.
– Reset Maintenance Count Saved displays momentarily.
When the reset operation is complete, the menu returns to
the Printer Setup Reset Maintenance Count screen.
Setting Configuration ID
The configuration ID is used to communicate information about
certain areas of the printer that cannot be determined using
hardware sensors. The Configuration ID is originally set at the
factory when the printer is manufactured, however it requires
resetting whenever you replace the engine board and can be set on
the operator panel. However the Configuration ID is the only
diagnostic function displayed until a valid ID is entered.
To set the Configuration ID:
1. Select Configuration ID from the Printer Setup menu.
– The current ID displays on the screen. The Configuration ID
is on a label located inside the printer. The label is attached
to the top front cover hinge assembly and is visible when the
top front cover is open.
– The leftmost digit blinks indicating that it is the first digit to be
changed.
2. To change the value, press either Menu> or 
						

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ID message displays on Line 2 before the ID redisplays. You
have to reenter the Configuration ID until a valid ID is verified. If
the ID is valid then the ID is saved in NVRAM and the printer
automatically PORs to activate the new setting.
Note:When the printer PORs it does so in the normal mode.
Restore EP Factory Defaults
To restore each of the printer settings contained in the EP Setup
menu to their factory default value select Restore from the menu. To
exit the menu without restoring the settings to the factory default
values, select Do Not Restore. Sometimes this is used to help
correct print quality problems.
Fuser Temperature
This adjustment can be used to help solve some customer problems
with paper curl on low grade papers and or problems with letter
heads on some types of media.
The fuser temperature can be adjusted as follows:
•NORMAL
•LOWER
•LOWEST
Warm Up Time
You can change the amount of time the printer warms up before
allowing pages to print by changing this setting from 0 to 5. The
factory sets the warm up at 0 or no warm up time. This time period
allows the backup roll to heat up and helps reduce curl in some
environments.
Transfer
The transfer can be adjusted as follows:
•LOW
•MEDIUM
•HIGH 
						

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Print Contrast
The print contrast setting controls the developer voltage offset.
The print contrast can be adjusted as follows:
•LOW
•MEDIUM
•HIGH
Charge Roll
The charge roll can be adjusted as follows:
•LOW
•MEDIUM
•HIGH
Print Tests
The purpose of the diagnostic Print Tests is to verify that the printer
can print on media from each of the installed input options. Each of
the installed options is listed in the following order in the menu:
Tr a y 1
Tray 2 (if installed)
Tray 3 (if installed)
Tray 4 (if installed)
Tray 5 (if installed)
Multipurpose Feeder (if installed)
Envelope Feeder (if installed)
For each input source selected you have the following choice:
•Single (prints the Print Test Page once)
•Continuous (continue printing the Print Test Page until Return or
Stop is pressed). 
						

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The contents of the Print Test Page varies depending on the media
installed in the selected input source.
Note:The Print Test Page always prints on one side of the paper,
regardless of the duplex setting or the presence of a duplex option.
To run the Print Test Page:
1. Select Print Tests from the Diagnostic menu.
2. Select the media source.
3. Select Single or Continuous.
– If single is selected no buttons are active during printing.
– If continuous is selected, Return or Stop can be selected to
cancel the test.
Check each Test Page from each source to assist in Print Quality
and Paper Feed problems.
Print Quality Test Pages
The purpose of this diagnostic function is to allow printing of the print
quality test pages with the toner cartridge lockout function disabled.
The print quality test consists of three pages. Page one contains a
mixture of graphics and text. Pages two and three only contain
graphics. If duplex is turned On, the pages are duplexed, otherwise
the pages are printed on one side. The Print Quality Test pages
must always be printed on letter, legal or A4 paper.
To run the Print Quality Test Pages:
1. Turn the printer off.
2. Press and hold Select and Return.
3. Turn on the printer.
4. Release the buttons once Performing the Self Test displays.
5. The printer performs its normal POR cycle then print one copy
of the Print Quality Test pages. If you want more than one copy,
perform these steps again. 
						

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The following is printed on page 1.
•Diagnostic EP Setup:
– fuser temperature, warm up time, transfer, print contrast and
charge roll settings.
•Contents of the Diagnostic Error Log.
•Printer configuration information:
– printer serial number, controller code level, engine code
level, operator panel code level, smart option code levels,
font versions, and so on.
•Values for the Quality Menu settings used to print the pages.
Printing Menu Settings Page
Note:This test page must be printed on letter, legal or A4 paper.
To print the Menu Settings Page:
1. Select the TESTS MENU.
2. Select Print Menus from the TESTS MENU.
The page contains the following information:
•A list of all the printer settings contained in the control panel
menus and their values.
•A list of the installed options and features such as RAM memory
SIMMs, optional input paper trays, envelope feeder, duplexer,
output bins, flash or disk.
•Printer information such as serial number, page count, installed
RAM, engine code level, RIP code level, envelope feeder code
level, tray 1-5 code levels, output bin 1-3 code levels, control
panel code levels, font ROM version and SRAM availability. 
						

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Autocompensator Operation
The autocompensator is a paper pick device that generates its own
normal force. This force generation is inherent in the fundamental
design of the pick arm. If light media is used, it picks very gently. If a
heavy media is used, it picks very aggressively. No customer
adjustments are necessary, therefore no special trays are needed for
card stock or labels.
The gearing in the arm is designed so the input torque from the
motor produces a movement about the pivot of the arm. This
movement produces a downward force at the pick rolls. The friction
between the pick roll and the paper produces a frictional locking
condition. If the paper is physically held and not allowed to feed, then
the motor stalls. Slippage between the roll and the paper is
theoretically impossible. When the motor is energized the pick rolls
are driven down into the stack increasing the normal force and drive
force until the bending strength of the paper is overcome and the
paper bends and moves up the dam. Once this critical threshold is
achieved the normal force remains at a level just high enough to
reliably feed the paper. Rather than having a fixed spring force for
feeding all weights of paper like the D-roll, this device has its own
mechanical logic for producing only enough pick energy to feed a
single sheet of paper regardless of its stiffness.
High normal force is one of the most significant contributors to
double feeding paper. The pick arm is counter balanced by an
extension spring located on the pick arm to reduce weight in the rest
state. This spring is factory set to exert no more than ten to fifteen
grams on the stack. This is as light as can be realistically set and
always guarantee there is some force to start the autocompensating
phenomena. This spring is not to be considered an adjustment for
feeding problems unless it is obvious that the pick arm cannot fall all
the way down to the bottom of the tray or has come loose. 
						

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Poor gear efficiency can cause the arm to generate higher normal
forces. If the pick assembly is noisy, replacement may be required.
The arm must pivot freely through its full range of motion. On 500
sheet trays there are wrap springs located on the pivot arbors of the
arm. These springs aid to prevent the arm from bouncing. If the arm
appears to be binding or sticky near the bottom of the tray these
springs may be the problem. Reducing the tension on the
counterbalance spring may be used as a temporary fix to get
additional weight at bottom, until the pick assembly can be replaced.
However, the counterbalance spring is not to be considered an
adjustment for feeding problems.
Autoconnect System, Paper Tray Options,
Envelope Feeder and Output Expander
Operations
Electrical
Autoconnect Cabling and Connectors
The printer options make electrical connection automatically or
autoconnects requiring no external cables when the option is
mechanically installed under the printer. Communication between
the option and the base printer stops when you remove an option
located above or below the printer. The printer no longer recognizes
the option and deletes associated messages. Each installed option
below the base printer provides an electrical autoconnect to the
option attached below it. The output expander option attached above
the base printer provides power to the option above it. We do not
recommend to attach or “Hot Plug” any options with the base printer
power turned On. 
						

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Duplex Option
The duplex option interface is a six pin autoconnector that provides a
+24 V dc, +24 V dc return, serial interface transmit signal, serial
interface receive signal and two ground pins. The duplex option
receives the +24 V dc from the base printer for the duplex motors
and also converts the voltage to +5 V dc for duplex electronics.
Duplex chassis grounding is provided from the printer to the duplex
option through a ground spring attached to the frame and base of
the printer. The ground connection is automatically made when the
option is installed below the printer.
The paper input sensor is located in the rear of the duplex unit under
the input paper guide. The rear cover open switch is located on the
rear cover assembly. The paper exit sensor is located on the left
frame assembly. The jam removal tray open switch is located at the
end of the left frame assembly. There are no switches in the level 2
duplex option.
Option Microcode
The options are “Smart Options” or options that have a system
board. The option system board has a microprocessor that controls
the option mechanism. A software architecture is provided that
controls the option and communicates information such as paper
path status, sensor or switch status, motor status and so on to the
base printer.
Fuser Operation
The fuser in the Optra S printers is made up of two primary
assemblies. The first assembly is the top fuser cover which contains
the thermistor/cable, thermal fuse, cable assembly, left and right
lamp brackets and cover. This is a complete assembly and the parts
cannot be individually replaced as in previous Lexmark laser
printers.
The thermal fuse protects the fuser assembly from overheating or
problems with the fuser lamp by opening the ac circuit to the lamp.
The thermistor assembly is designed to keep the temperature of the
fuser hot roll within a predetermined temperature by being in contact
with the fuser hot roll and changes resistance as the temperature of