(3) Operation
a. Block diagram
MCU(PCU)PWB | High voltage power PWB |
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| +24V | CN805 | |
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ASIC | PUS |
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(IC8) |
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| 2 | PUS | |
MEN |
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| CN804 | |
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| 1 | MA |
| MMT0 |
| Motor |
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| 2 | MA- |
| MMT1 |
| driver |
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| 3 | MB |
CPU |
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| 4 | MB- |
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(IC5) |
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| +5V |
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| PIN |
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| Paper entry | ||
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| roller |
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| +5V | CN7 |
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| 1 | +5V |
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| POUT- | POUT |
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| 2 | PD802 | roller |
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| 3 | GND |
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| LSU PWB |
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PE | CN9 |
| CN601 |
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9 | PE |
| 9 | PE |
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| roller | ||
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Paper pickup solenoid
Main motor
Paper feed roller
b. Operation
*The main motor is a
*The pickup solenoid operates on 24V and turns ON/OFF paper feed operation.
*The following sensors are used.
Paper empty sensor (transmission photo transistor):
It is installed on the LSU PWB and is used to detect whether there is paper in the paper feed tray or not.
Paper entry sensor (Transmission photo transistor):
This sensor is used to detect the paper feed timing of next paper (in
Paper exit sensor (Transmission photo transistor):
This sensor is used to detect that paper is discharged.
It is also used to detect a paper jam.
*Paper release lever
(Paper release) | (Paper fixed) |
The paper release lever is used to fix or release paper. To release paper, pull the lever toward you as shown in the figure below. To fix paper, push the lever forward. The lever mechanism is as shown below.
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