Canon F-1, Service Manual

Page: 16 / 179

2
2
2-3
2-3
Technology > Basic configuration > Reader > Reader controller PCB
Technology > Basic configuration > Reader > Reader controller PCB
■
Overview of power circuit
Control of the host machine is conducted at the reader controller PCB.
Reader controller PCB also controls the DADF driver PCB and DADF scanner unit.
Following is the relations of each electrical part.
Sensor
Fan
Motor
Host
machine
Reader
controller
PCB
Scanner unit (reader)
Scanner unit (DADF)
DADF driver PCB
Error Code
E270 (Error in the main scanning/sub scanning synchronization signal).
-0001 Sub scanning synchronization signal (VSYNC) is not properly transmitted from scanner
unit PCB (front side scanner unit), and this causes image failure or abnormal termination.
-0002 Sub scanning synchronization signal (VSYNC) is not transmitted due to the error in the
main scanning synchronization signal (HSYNC), and this causes image failure or abnormal
termination.
-0101 Sub scanning synchronization signal (VSYNC) is not properly transmitted from scanner
unit PCB (back side scanner unit), and this causes image failure or abnormal termination.
E280 (Communication error between reader controller PCB – scanner unit)
- 0001 If the communication is not started within the specified time between reader controller
PCB – front side scanner unit.
- 0101 If the communication is not started within the specified time between reader controller
PCB – back side scanner unit.
E400 (Communication error between reader controller PCB – DADF)
-0001, -0002
If reception error occurs during communication between reader controller PCB - DADF
E490 (Error caused by incorrect DADF type)
-0001 If a not-supported DADF type is installed.
E473 (DDI communication error)
-0000, -0003, -0004
If the reader controller PCB detects communication error between the main controller PCB and
the reader controller PCB.
F-2-3
■
Reader controller PCB
Following is the function configuration of reader controller PCB.
Jack No. Destination
J101 Host machine (for power supply)
J102 DADF open/closed sensor 1 (SR1)
Scanner unit HP sensor (SR2)
DADF open/closed sensor 2 (SR3)
J103 Scanner unit exhaust fan (FM1)
J104 DADF driver PCB (for communication)
J105 Scanner unit (DADF)
J106 Scanner unit (Reader)
J107 Original size sensor 1 (CF1)
Original size sensor 2 (CF2)
J108 Scanner motor (M1)
J109 Main controller PCB (for communication)
J110 (Connection with PC)
J111 DADF driver PCB (for power supply)
J112 Scanner unit cooling fan (FM2)
J101
J102
J103
J104
J111
J110
J105
IC
J106
J107
J108
J109
J112
T-2-2
F-2-4