Lexmark CS720 User Manual

Options communication error service check
Action Yes No
Step 1
a Check if the firmware is updated, and then update the firmware
if necessary.
b Make sure that the printer supports the option. See the Printer,
Option, and Stand Compatibility Guide.
c Make sure that the option is properly attached to the printer or
adjacent option.
d Reset the printer.
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
Reseat the printer interface cable on the printer controller board.
Does the problem remain?
Go to step 3. The problem is
solved.
Step 3
Do the following to each option:
a Reinstall the option.
b Print a test page, and then check if the option is defective.
Are all options properly working?
Go to step 4. Contact the next
level of support
Step 4
Reseat the option interface cable.
Does the problem remain?
Go to step 5. The problem is
solved.
Step 5
Check the option interface cable for damage.
Is the cable free of damage?
Go to step 6. Go to step 7.
Step 6
Replace the option interface cable. See
“550-sheet tray interface
cable removal” on page 383.
Does the problem remain?
Go to step 7. The problem is
solved.
Step 7
Replace the option controller board. See
“550-sheet tray
controller board assembly removal” on page 382.
Does the problem remain?
Contact the next
level of support
The problem is
solved.
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Diagnostic information
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Lexmark CS720 Specifications

General

Type	Original
Compatibility	- CS720
Product color	Black
Printing colors	Yellow
Country of origin	China
Quantity per pack	1 pc(s)
Brand compatibility	Lexmark
Color toner page yield	7000 pages
Cartridge return & recycling	Yes
Print technology	Laser printing
Harmonized System (HS) code	84439990

Weight and Dimensions

Package depth	160 mm
Package width	190 mm
Package height	75 mm
Package weight	380 g