Brother 1840C - Manual (Page 22)

INTRODUCTION 1 - 7
Load documents
You can send a fax, make copies, and scan from the ADF (automatic
document feeder).
Using the automatic document feeder (ADF)
The ADF can hold up to 20 pages and feeds each sheet individually.
Use standard 80 gsm paper and always fan the pages before putting
them in the ADF.
Recommended environment
Temperature: 20° - 30° C
Humidity: 50% - 70%
Paper: 80 gsm A4
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Make sure documents written with ink are completely dry.
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Documents to be faxed must be from 8.9 to 21.6 cm wide and 12.7
to 35.6 cm long.
DO NOT use paper that is curled, wrinkled, folded, ripped,
stapled, paper clipped, pasted or taped.
DO NOT use cardboard, newspaper or fabric.