Lexmark T650 Series Service Manual

Diagnostic information 2-117
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990.54 HCIT tray lift motor
lost encoder failure
The HCIT tray lift motor is not
reporting pulses back to the
engine.
1. Check for obstruction in the
HCIT tray lift area.
2. Check the connections on
the HCIT tray lift motor
assembly for proper
connection.
3. Replace the HCIT tray lift
drive motor assembly if
problem remains. Go to “High
capacity input tray (HCIT)
tray lift drive motor assembly
removal” on page 4-125
990.90 Sensor connection
failure
Hardware error (sensors are
not plugged on the board)
Replace all connections on the
system card assembly.
991.00 System card failure Device system card failed
basic assurance test.
Replace the system card
assembly.
Go to “System card
assembly removal” on
page 4-75.
991.05 Checksum failure Bad checksum Replace the system card
assembly.
Go to “System card
assembly removal” on
page 4-75.
Error
code or
message
Error contents Description/Action Possible repair actions

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