Canon MultiPASS C530 Service Manual page 81

MultiPASS C530/C560 Chapter 2: Technical Reference
The electrical section is composed of the following: the SPCNT board, which performs system control and
BJ printer control; the NCU board, which is the interface with the telephone circuit; the power supply unit;
and the OPCNT board, which detects key operations and displays status information. There are also 6
sensors to detect system status.
Ink detect sensor:
Detects ink fired from the
BJ head, in order to
detect when the BJ cartridge
runs out of ink.
Document edge sensor:
Detects the trailing edge
of the document.
SPCNT board
Paper edge sensor:
Detects the state of paper
feeding and delivery.
Pickup roller sensor:
Detects the state of
pickup roller.
Document sensor:
Detects whether or not
a document is set.
MODEM board
Power supply unit
NCU board
Figure 2-2 Electrical System Layout
OPCNT board
Modular jack board
2-2
Home position sensor:
Detects the carriage position
and purge unit status.