Canon NP6621 Service Manual page 60

OPERATIONS AND TIMING
2. Inputs to the DC Controller (2/5)
Copyboard cover
sensor
Vertical path roller 2
paper sensor
Cassette 2 paper
sensor
Duplexing unit outlet
paper sensor
Duplexing unit inlet
paper sensor
Vertical path roller 1
paper sensor
3–4
J 310A- 12
PS 11
J 309- 6
PS 12
J 309- 1
PS 13
J 325- 3
PS 14
J 320- 1
PS 15
J 314- 12
PS 16
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DC controller
5V
- 11
CVOP
When the copyboard cover is open, '1'.
- 10
(when the light-blocking plate is at PS24)
5V
- 5
When PS12 detects paper, '1'.
VP2P
- 4
5V
- 3
CPD2*
When paper is present in the cassette, '0'.
- 2
(when the light-blocking plate is not at PS13, '0').
5V
- 2
DUEX When paper is present at the duplexing unit outlet, '1'.
- 1
5V
- 2
DUIN When paper is present at the duplexing unit inlet, '1'.
- 3
5V
- 13
VP1P When paper is present at the vertical
- 14
path roller 1 sensor, '1'.
Figure 3-104
CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)