
Chapter 9
9-4
When the main power switch (SW1) is turned on, AC power is supplied to the low-voltage power supply circuit in the power supply PCB.
The low-voltage power supply circuit su3.3 V, +5 V, and +24 V to operate the machine.
+24 V is supplied to the motors, fan, electromagnetic clutch, solenoid, etc. +5 V and +3.3 V are supplied to the sensor, etc.
There are two types of +24 V voltages: +24 V which is normaly supplied from the low voltage power supply and +24 VR which is cut off when the front cover or
the left door is opened. The +24 VR also plays the role of a door open detection signal (DOPEN). This signal allows the CPU to detect that the front cover or the
left door has opened.
T-9-2
F-9-6
9.3.1.3 Outline (When the duplex unit is not equipped)
0028-6587
Part Name
Function
Power supply PCB
Generates DC power from AC power.
Option power supply PCB (option)
Generates DC power from AC power for the options.
Main power switch (SW1)
Supplies AC power to the power supply PCB.
Front cover switch (SW2)
Detects opening/closing of the front cover and cuts off +24 VR.
Left door switch (SW3)
Detects opening/closing of the left door and cuts off +24 VR.
P1
NF
NF
Power supply PCB
: AC
: DC
F1
F101
SW1
TP1
H2
H1
Heater drive
circuit
RL1
SW2
SW3
Reader
controller
PCB
Low-voltage
power supply
circuit
+24V
+24VR
Option
power supply
PCB
Option
- Finisher
- Cassette feeding
module
+24Vop
DC
controller
PCB
Image
Processor
PCB
Control panel
Motor
Sensor
Option
- DADF
Laser unit
Motor
Clutch
Solenoid
Fan
Sensor
HVT
PCB
+24V
+5VR
+3.3VR
+5V
+3.3V
+24VR
+24V
+5VR
+3.3VR
+24VR
+5VR
+3.3VR
Duplex unit
Option
- Inner 2 way tray
+24V
Summary of Contents for iR2318 series
Page 1: ...May 12 2014 Service Manual iR2422 2420 2320 2318 Series ...
Page 2: ......
Page 6: ......
Page 16: ...Contents ...
Page 17: ...Chapter 1 Introduction ...
Page 18: ......
Page 20: ......
Page 50: ......
Page 51: ...Chapter 2 Installation ...
Page 52: ......
Page 54: ......
Page 58: ...Chapter 2 2 4 7 Left cover front 15 Right cover upper 8 Manual feed tray 16 Right cover lower ...
Page 62: ...Chapter 2 2 8 8 Manual feed tray 16 Right cover lower ...
Page 64: ...Chapter 2 2 10 8 Manual feed tray 16 Right cover lower ...
Page 89: ...Chapter 2 2 35 ...
Page 90: ......
Page 91: ...Chapter 3 Main Controller ...
Page 92: ......
Page 94: ......
Page 102: ......
Page 103: ...Chapter 4 Original Exposure System ...
Page 104: ......
Page 135: ...9 Remove the reader heater left 1 Connector 2 1 pc Screw 3 1 pc F 4 73 2 3 1 ...
Page 136: ......
Page 137: ...Chapter 5 Laser Exposure ...
Page 138: ......
Page 140: ......
Page 148: ...Chapter 5 5 8 ...
Page 149: ...Chapter 6 Image Formation ...
Page 150: ......
Page 152: ......
Page 165: ...Chapter 7 Pickup Feeding System ...
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Page 192: ...Chapter 7 7 24 ...
Page 193: ...Chapter 8 Fixing System ...
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Page 207: ...Chapter 9 External and Controls ...
Page 208: ......
Page 229: ...Chapter 10 Maintenance and Inspection ...
Page 230: ......
Page 232: ......
Page 235: ...Chapter 11 Standards and Adjustments ...
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Page 238: ......
Page 240: ...Chapter 11 11 2 ...
Page 241: ...Chapter 12 Correcting Faulty Images ...
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Page 256: ......
Page 257: ...Chapter 13 Self Diagnosis ...
Page 258: ......
Page 260: ......
Page 269: ...Chapter 14 Service Mode ...
Page 270: ......
Page 272: ......
Page 287: ...Chapter 15 Upgrading ...
Page 288: ......
Page 290: ......
Page 295: ...Chapter 16 Service Tools ...
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Page 300: ......
Page 301: ...Chapter 17 Backup Data ...
Page 302: ......
Page 303: ...Contents Contents 17 1 Backup Data 17 1 ...
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Page 307: ...May 12 2014 ...
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