Canon FAX L1000 Service Manual page 205

2.6.2 Functions
a) SCNT board
The SCNT board performs the following functions.
Drive control
The drive control section controls the document feed motor in the document scanning
section.
Operation panel control
The operation panel control section serially transfers data to or from the control IC on the
OPCNT board, receives button operation status, document status, etc., and sends the
display and LED signals to the control IC on OPCNT board.
Scanner control
Image data input from the contact sensor are processed by the UHQ-6.6 image processing
IC, coded by the CODEC IC, and sent to the DRAM from the system controller.
Printer interface control
The printer control section converts facsimile data of horizontal resolution of 8 or 16 dots/
mm, and vertical resolution of 3.85, 7.7 or 15.4 line/mm to LBP print data of 600 dpi. This
section synchronizes the vertical sync signal (nTOP) to the printer section with the
horizontal sync signal (nBD) from the printer section to transmit an image signal (nVDO)
to the printer section.
Communications unit control
The SCNT board detects line signals, such as CNG, DTMF and ROT. The modem, with a
transmission rate of 33.6k bps, modulates and demodulates transmission/reception data
and sends DTMF signals.
Speaker control
The SCNT board controls the alarm, button operation tones and line monitor tones.
The speaker volume control on the operation panel adjusts the line monitor
volume. The button operation and alarm volumes are adjusted by specifying
user data.
NOTE
Sensor detection
The SCNT board detects the statues of the sensors which in the scanner section, printer
section, paper loading section, and covers to monitor the drive section.
FAX-L1000 Chapter 3: Technical Reference
3-61