Checking The Quality Of The Documents - Oce 3121 Technical & Service Manual

10 Checking the quality of the documents

1) Outline
The RDF carries out the following checks:
The presence of a document on the document tray.
1
The size of the document on the document tray.
2
The number of documents on tray, to give confirmation that all documents have
3
been copied.
The trailing edge of the last document.
4
2) Checking the Presence of Originals
Sensor S1 checks the presence of a document on the document tray.
When a document is placed on the document tray, the light from LED1 is
blocked. The document sensor S1 generates the original detection signal
DEP1.
When the RDF control PBA receives the DEP1 signal, the PBA switches on
the set indicator (LED101 and LED 102).
520 TSM Océ 3121
RDF controller PCB
LED101,102
LED1
Display
PCB
Original
S1
S11
Functional description