Canon DR 5020 Instruction Manual - Page 84

Use a clean, soft cloth to wipe the scanning glasses.

Page 84 highlights

Chapter 5 Daily Cleaning 4 Use a clean, soft cloth to wipe the scanning glasses. Be sure to clean both scanning glasses, the one below and one above. CAUTION Never spray mild detergent or water directly on the scanning glasses. The spray could penetrate below the glass and contaminate the internal light source and lenses. Scanning glasses 84

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84
Chapter 5
Daily Cleaning
4
Use a clean, soft cloth to wipe the scanning glasses.
Be sure to clean both scanning glasses, the one below and one above.
Never spray mild detergent or water directly on the scanning glasses. The spray
could penetrate below the glass and contaminate the internal light source and
lenses.
Scanning glasses
CAUTION