Oce 3121 Technical & Service Manual page 403

Document size (in width direction)
VR1 measures the width of a document, while it is on the document tray.
The resistance of VR1 varies in accordance with the movement of the side
guides.
The change of resistance are translated into a width measurement by the RDF
control PBA.
The dimensions obtained by the RDF are translated into a default size.
RDF is configured for A/B sizes
Default size
B5R
A5
A4R
FOOLSCAP
B5
B4
COMPUTER paper
A4
A3
For the vertical length: the default size will be the default size ±10 mm.
for the width dimension: the default size will be the default size ±5 mm.
Other lengths are not considered to be default sizes.
522 TSM Océ 3121
VR1
RDF control PBA
RDF controller PCB
Side guides
Side guides
Vertical length
257mm
148.5mm
330mm
330mm
182mm
364mm
381mm
210mm
420mm
Width of the document
177mm to 187mm
205 to 215mm
252 to 262mm
274 to 284mm
292 to 302mm
Functional description