Canon imagePRESS C1 Service Manual - page 283
Chapter 5
5-4
T-5-4
5.2 Basic Sequence
5.2.1 Basic Sequence of Operation at Power-On
0012-9670
imagePRESS C1 / Color Image Reader-H1 / imagePRESS C1+ (Printer) / imagePRESS C1+
F-5-6
F-5-7
5.2.2 Basic Sequence of Operation in Response to a Press on the Start Key
0012-9671
imagePRESS C1 / Color Image Reader-H1 / imagePRESS C1+ (Printer) / imagePRESS C1+
1. Basic Sequence of Operation in Response to a Press on the Start Key (book mode; 1 original)
J203
used for communications with the printer unit (connection with the scanner motor).
used for communications with the ADF (image signal input).
J204
used for connection with the CCD unit.
J205
used for communication with the CCD unit.
J206
used for connection with the inverter PCB.
J207
used for connection with the original size sensor (AB-configuration).
J208
used for connection with the original size sensor (inch-configuration).
J209
not used
J210
not used.
IC
Description
IC1
CPU (stores boot program)
IC2
ASCI (built-in RAM)
IC3
flash RAM (stores firmware)
IC4
EEPROM (backs up service mode settings)
Jack No
Description
Reader motor
Original scanning lamp
HP sensor
STBY
STBY
SREADY
Reverse
Forward
ON
ON
Scanner unit position
HP (shading position)
Gain correction
Offset correction
Forward
Reverse
shift shading
fixed shading
white plate dust detection control
shading correction
HP (shading position)
{
1. HP positioning
2. CCD-LIVE control
gain correction
3. move to shift shading
start position
Start
position
Shading
position
Image leading edge
Original size detection
position
*1: shifts only if the copyboard (ADF) is open.
4. shift shading
5. fixed shading
- white plate dust detection
shading correction
*2: controls by turning on/off the power of the CCD and the circuitry around it for power saving and
for protection against overheating.
*1
*1
*2