
Chapter 9
9-6
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-9-4
F-9-8
9.3.1.5 Rated Output of the Power Supply PCB
0020-4165
9.3.2 Protection Function
9.3.2.1 Protective Mechanisms
0020-4167
The power supply PCB is provided with an overcurrnet/overvoltage protection function to automatically cut off the output voltage when a trouble such as a short
circuit occurs on in the load.
When the overcurrnet/overvoltage protection function is activated, turn off the main power switch, solve the trouble with the load, and then turn on the main power
switch.
Further, the power supply circuit has two fuses which blow to stop power supply when an excessive current flows in the AC line.
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.
Output
24V
5VR
3.3V
3.3VR
Rated output voltage
24V
5.1V
3.4V
3.4V
Output voltage tolerance
+10%,-5%
+3%,-4%
+3%,-3%
+3%,-3%
Rated output current
3.0A
0.8A
0.75A
0.85A
Overcurrent protection trigger current
9.0A
6.0A
8.0A
8.0A
Overvoltage protection trigger voltage
32.5V
8.0V
5.5V
5.5V
P1
Power supply PCB
: AC
: DC
F1
F101
SW1
TP1
H2
H1
Heater drive
circuit
RL1
SW2
SW3
Reader
controller
PCB
+24V
+24VR
Option
power supply
PCB
Option
- Finisher
- Cassette feeding
module
+24Vop
Control panel
Motor
Sensor
Option
- DADF
Image
Processor
PCB
HVT
PCB
+24V
+5VR
+3.3VR
+5V
+3.3V
+24VR
+24V
+5VR
+3.3VR
+24VR
+5VR
+3.3VR
+24V
switch drive
circuit
Low-voltage
power supply
circuit
Duplex unit
Option
- Inner 2 way tray
Laser unit
Motor
Clutch
Solenoid
Fan
Sensor
DC
controller
PCB
NF
NF
System
controller
+5VR
Содержание iR2318 series
Страница 1: ...May 12 2014 Service Manual iR2422 2420 2320 2318 Series ...
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Страница 16: ...Contents ...
Страница 17: ...Chapter 1 Introduction ...
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Страница 51: ...Chapter 2 Installation ...
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Страница 58: ...Chapter 2 2 4 7 Left cover front 15 Right cover upper 8 Manual feed tray 16 Right cover lower ...
Страница 62: ...Chapter 2 2 8 8 Manual feed tray 16 Right cover lower ...
Страница 64: ...Chapter 2 2 10 8 Manual feed tray 16 Right cover lower ...
Страница 89: ...Chapter 2 2 35 ...
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Страница 91: ...Chapter 3 Main Controller ...
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Страница 97: ...Chapter 3 3 3 F 3 3 SEND FAX PullScan E Mail BDL Print PC Original Copy A A A Print output Scan Image data ...
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Страница 103: ...Chapter 4 Original Exposure System ...
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Страница 135: ...9 Remove the reader heater left 1 Connector 2 1 pc Screw 3 1 pc F 4 73 2 3 1 ...
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Страница 137: ...Chapter 5 Laser Exposure ...
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Страница 148: ...Chapter 5 5 8 ...
Страница 149: ...Chapter 6 Image Formation ...
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Страница 165: ...Chapter 7 Pickup Feeding System ...
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Страница 193: ...Chapter 8 Fixing System ...
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Страница 207: ...Chapter 9 External and Controls ...
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Страница 229: ...Chapter 10 Maintenance and Inspection ...
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Страница 235: ...Chapter 11 Standards and Adjustments ...
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Страница 241: ...Chapter 12 Correcting Faulty Images ...
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Страница 257: ...Chapter 13 Self Diagnosis ...
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Страница 269: ...Chapter 14 Service Mode ...
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Страница 287: ...Chapter 15 Upgrading ...
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Страница 295: ...Chapter 16 Service Tools ...
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Страница 297: ...Contents Contents 16 1 Service Tools 16 1 16 1 1 Special Tools 16 1 16 1 2 Oils and Solvents 16 1 ...
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Страница 301: ...Chapter 17 Backup Data ...
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Страница 303: ...Contents Contents 17 1 Backup Data 17 1 ...
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Страница 307: ...May 12 2014 ...
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