
2-2
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.
Figure 2-2 Electrical System Layout
Paper edge sensor:
Detects the state of paper
feeding and delivery.
Pickup roller sensor:
Detects the state of
pickup roller.
Ink detect sensor:
Detects ink fired from the
BJ head, in order to
detect when the BJ cartridge
runs out of ink.
Document sensor:
Detects whether or not
a document is set.
Document edge sensor:
Detects the trailing edge
of the document.
Home position sensor:
Detects the carriage position
and purge unit status.
Modular jack board
Power supply unit
SPCNT board
OPCNT board
NCU board
MODEM board
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