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Lexmark 20G0482 - T 644tn B/W Laser Printer Service Manual page 390

Service manual
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4061-xx0
5.
Slide the shield to the right, and then remove it.
6.
Set the shield aside.
Use the illustration to locate the connector for the card you want to install.
Option card connectors
A-6
Service Manual
Firmware card connector
Memory card connector
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