Lexmark Optra S 1620 Manual

Diagnostic Aids3-28
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the hot roll increases. The thermistor resistance changes from
approximately 150K ohms to approximately 260K ohms as the
temperature of the fuser hot roll increases. The thermistor is
connected to the fuser control board connector J2-1 and J2-2 and
from J2 to J1-2 and J1-3 on the fuser control board to J2-6 and J2-7
on the engine board. J2-6 (TEMPIN+) and J2-7 (TEMPIN-) are
connected to module PLCC U9. U9 monitors the change in
thermistor resistance and sends a signal...

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Paper Feed Jams
Paper Jams - Base Printer
Error Message 200 - Paper Jam - Remove Cartridge
This message indicates that paper is jammed at the printer input
sensor. This condition can be caused by the paper jamming prior to
activating the input sensor flag, the sensor not detecting paper over
the sensor or paper arriving at the sensor too late.
Error Message 201 - Paper Jam - Remove Cartridge
This message indicates the paper is jammed between the printer’s
input and exit...

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Error Message 250 - Paper Jam - Check MP Feeder
The paper is jammed in the multipurpose feeder and has not
reached the base machine input sensor or has not reached the input
sensor in time.
Error Message 260 Paper Jam - Check Envelope Feeder
An envelope is jammed in the envelope feeder or has not reached
the base machine input sensor.
Error Message 27x Paper Jam - Check Bin x.
Paper is jammed in output bin x (X=bin 1 thru 3). Generally this
message appears when the paper has...

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4.Repair Information
WARNING:Read the following before handling electronic parts.
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 logic boards:
•Keep the ESD-sensitive part in its original shipping container (a
special “ESD bag”) until you...

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Adjustment Procedures
Duplex Motor Drive Belts
Do the duplex motor belt and drive belt adjustment whenever you
remove or replace the duplex motor or loosen the motor or drive belt
idler pulley.
Service Tip: Excessive belt tension can result in stalling the duplex
motor. Too little belt tension can result in belt slippage.
To do the duplex drive belt adjustment:
1. Do the removal procedure“Duplex Front Cover Door” on
page 4-21to access the drive belt idler pulley.
2. Loosen...

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Fuser Solenoid Adjustment
Perform the fuser solenoid adjustment whenever you replace the
fuser solenoid. Adjust the fuser solenoid while installed in the printer.
Adjust the screw on the eccentric mounted on the solenoid housing
to provide an air gap between the rear of the solenoid stator and the
solenoid armature.
Gap Adjustment
The gap adjustment allows you to increase the minimum gap
between sheets of paper as they are fed through the printer. This
adjustment does not...

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Printhead Assembly Adjustment
Do the printhead assembly adjustment whenever you remove or
replace the printhead assembly or loosen the mounting screws.
Install the new printhead with the three mounting screws centered in
the slots in the printhead frame assembly. Leave the screws loose
enough to allow the printhead assembly to move from side to side
within the slots. It is necessary to perform a registration adjustment
before locking down the three printhead mounting...

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Paper Alignment Assembly Adjustment
Do the alignment assembly adjustment whenever you replace the
alignment assembly. Always print a copy of the Quick Test Page
before making any adjustments to the alignment assembly reference
adjustment screw. When replacing the alignment assembly, it is
necessary to back the reference adjustment screw out far enough to
remove the old assembly and install the new one.
If you are replacing the alignment assembly go to step a. If you are...

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b. Print a copy of the Quick Test Page and check the margin
adjustments printed on the test page. These settings should
be within the range specified in“Print Registration” on
page 3-18. The reference screw can be adjusted without
loosening the locknut. Turn the screw a few turns and print a
copy of the Quick Test Page as you check the diamonds on
the left margin. Continue adjusting the screw as you check
the results of each adjustment on a new test page until you
obtain...

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Screw Identification Table
The following table contains screw types, locations, and quantities
necessary to service the printer. Each screw callout in the removal
procedure graphic displays the screw reference number listed in the
table. Pay careful attention to each screw type location when doing
removals. You must install the correct screw type in each location
during reassembly.
Reference
NumberScrew Type Location Purpose Qty
M3.5x8 mm
Thread Cuttingright side frame to...