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%2.2 Power/Sensor Board
2.2 Power/Sensor Board
The power/sensor board consists of an AC filter circuit, a low voltage power supply circuit, a high voltage
power supply circuit, heater drive circuit, and photosensors.
(1) Low voltage power supply circuit
This circuit generates the following voltages.
Output voltage
Use
+5 V Logic circuit supply voltage
+30 V
Motor and fan drive voltage and source voltage for
high-voltage supply
+8 V
RS-232C line voltage
8 V
RS-232C line voltage and analog circuit supply
voltage
(2) High voltage power supply circuit
This circuit generates the following voltages necessary for electro-photographic processing from
+30 V according to the control sequence from the control board. When cover open state is
detected, +30 V supply is automatically interrupted to stop the supply of all the high-voltage
outputs.
Output
Voltage
Use
Remarks
CH
-1.30 KV
Voltage applied to
charging roller
DB
-240 V/+300 V
Voltage applied to
developing roller
SB
-360 V/450 V
Voltage applied to
toner supply roller
TR
+4 KV/-1.3 kV
Voltage applied to
transfer roller
Variable
CB
+400 V
Voltage applied to
cleaning roller
(3) Photosensor
The photosensor mounted on this power/sensor board supervises the paper running state during printing.
Figure 2-3 shows the sensor layout diagram.
Summary of Contents for OL1200ex
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Page 39: ...3 2 Parts Layout 1 4 3 2 Parts Layout 1 4...
Page 40: ...Parts Layout 2 4 Parts Layout 2 4...
Page 41: ...Parts Layout 3 4 Parts Layout 3 4...
Page 42: ...Parts Layout 4 4 Parts Layout 4 4...
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Page 87: ...User maintenance mode menu system User maintenance mode menu system...
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Page 90: ...System maintenance mode menu system System maintenance mode menu system...
Page 93: ...Engine maintenance mode menu system Engine maintenance mode menu system...
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Page 125: ...Fig 6 2 Measurement by a Multimeter Fig 6 3 Connector and Pin Location...
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Page 144: ...No Replace the control board or Power Sensor board...
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Page 152: ...Chapter 7 7 Wiring Diagram 7 WIRING DIAGRAM 7 1 Interconnect Signal Diagram...
Page 153: ...7 2 PCB Layout 7 2 PCB Layout 1 Control board AOLM...
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Page 155: ...7 3 Resistance Check 7 3 Resistance Check...
Page 159: ...21 AOLM PCB 4YA4046 163 4G11 1 2 5 10 55077311...
Page 173: ...1 2 External View and Component Names 1 2 External View and Component Names...
Page 177: ...3 2 Parts Layout 3 2 Parts Layout This section describes the layout of the main components...
Page 190: ...5 Connection Diagram 5 CONNECTION DIAGRAM 5 1 Interconnection Diagram...
Page 191: ...5 2 PCB Layout 5 2 PCB Layout AOLT PCB...
Page 195: ...1 2 External View and Component Names 1 2 External View and Component Names...
Page 199: ...3 2 Parts Layout 3 2 Parts Layout This section describes the layout of the main components...
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Page 213: ...5 Connection Diagram 5 CONNECTION DIAGRAM 5 1 Interconnection Diagram AOLE PCB...