Editing Atari 5200 General Maintenance (section)

=== Controller Port Maintenance ===
The 15-pin controller ports suffer from bent pins and oxidation. Bent pins result from forcing controllers at incorrect angles. Inspect each port for obvious damage before attempting connection.

'''Port Cleaning:'''
Spray DeoxIT into each controller port, then insert and remove a controller plug several times to work the cleaner across all contacts. For deep cleaning, use compressed air to remove debris, followed by isopropyl alcohol on cotton swabs sized to fit between pin rows. The ports on 4-port models see less use on positions 3 and 4, which may exhibit more oxidation.