Routine enlarger maintenance is mostly preventive cleaning, light lubrication, inspection, and alignment, with corrective work only as needed.

Common items to include:

• clean dust from the enlarger body and internal areas
• clean condenser(s) only if needed, using lens cleaner and lint-free wipes
• remove and clean the enlarging lens
• inspect gears, tracks, locks, carrier-stage hardware, focus mechanism, and electrical parts
• check timer accuracy
• check for oxidation, chipped interior paint, light leaks, or electrical faults
• verify alignment of the negative stage and lens stage

For dust, compressed air is commonly used, but a soft brush may be better for stubborn buildup. Be careful not to just move dust deeper inside. If oxidation is found, remove it gently and repaint interior areas with matte black paint if needed.

Use only the correct enlarger lamp type. Lubricate very lightly and sparingly; avoid over-applying anything to tracks or gears. Be gentle with screws and adjustments.

Alignment is critical: use a sharp test negative and confirm sharpness edge-to-edge on the baseboard. Mirror- or laser-based alignment methods can also work. If you disturb condenser or stage components, recheck alignment afterward.

Also inspect the carrier opening handle/cams and set screws, since these can drift out of adjustment over time.