Lexmark T650 Series Service Manual

Diagnostic information 2-135
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4
Check the sensor (duplex input) for proper operation.
1. Enter the diagnostic mode
2. Select Duplex tests
3. Select sensor test
4. Observe the line item “input”
Does the display on the operator panel, change every time
the sensing area of the above sensor is interrupted or
blocked.
Go to step 6. Go to step 5.
5
Check the above sensor for proper connection.
Is the above sensor connected properly?
Replace the
sensor (duplex
input).
Go to “Sensor
(duplex input)
removal (T652,
T654, T656)” on
page 4-68.
Replace the
connection.
6
Check the aligner assembly for obstructions.
Is the above component free from obstructions?
Go to step 7. Remove
obstructions.
7
Check the external duplex media path for obstructions.
Is the above component free from obstructions?
Go to step x Remove
obstructions.
8
Check the external duplex unit assembly for proper
installation.
Is the above component properly installed?
Go to step 9. Remove then
properly re-install
the external
duplex unit
assembly.
9
Check the sensor (duplex input) for proper operation.
1. Enter the diagnostic mode
2. Select Duplex tests
3. Select sensor test
3. Observe the line item “input”
Does the display on the operator panel, change every time
the sensing area of the above sensor is interrupted or
blocked.
Go to step 10. Replace the
external duplex
assembly.
10
Perform a print test using the duplex.
Does the problem remain?
Contact next
highest level of
tech support.
Problem solved.
Step Check Yes No

Lexmark T650 Series Specifications

General

Print Technology	Monochrome Laser
Print Speed	Up to 45 ppm
Print Resolution	1200 x 1200 dpi
Monthly Duty Cycle	Up to 200, 000 pages
Standard Output Capacity	250 sheets
Processor Speed	500 MHz
Connectivity	USB, Ethernet
Maximum Paper Size	8.5 x 14 inches
Operating System Compatibility	Windows, Mac OS, Linux
Memory	128 MB, expandable to 640 MB
Standard Input Capacity	650 sheets