it is tool , not a computer .
but here is googles 1st hit
https://www.nodevice.com/service-manuals/other/duplo/dbm-100#lang-enIt is
Duplo DBM-100 Booklet Bookletmaker and Trimmer
Type: Automatic paper size setting type saddle-stapling and folding unit
Paper size:
Saddle-stapling and folding/Center-folding
a commercial type class machine.
and needs service
so buy the service manual?
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