Read Sharp MX-FN21 / MX-FN22 / MX-PN13 (serv.man3) Service Manual online
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Description on marks
The following marks are used in this Service Manual.
Mark
Meaning
Mark
Meaning
Indicates that connectors are
disconnected.
disconnected.
Indicates that a screw is
removed.
removed.
Indicates that connectors are
connected.
connected.
Indicates that a screw is
attached.
attached.
Indicates that wires are
disengaged from a cable
guide or wire saddle.
disengaged from a cable
guide or wire saddle.
Indicates that a pawl is
disengaged.
disengaged.
Indicates that wires are
engaged with a cable guide or
wire saddle.
engaged with a cable guide or
wire saddle.
Indicates that a pawl is
engaged.
engaged.
The descriptions on this Service Manual are based on the following principles.
1. Each chapter describes the purpose and the role of each function, the relationship
between the electrical system and the mechanical system, and the operating timing of
each part.
each part.
"
" on the drawings indicates mechanical drive transmission. If
is used
together with a signal name, it indicates a flow of electricity.
"Power supply" in each chapter indicates that the power switch is turned ON, that the
front door is closed, that the paper exit door is closed, and that the power is supplied to
the machine.
front door is closed, that the paper exit door is closed, and that the power is supplied to
the machine.
2. In the descriptions of the digital circuits of this machine, “1” is used when the voltage
level of a signal is high, and “0” is used when it is low. The voltage value, however,
depends on the circuit.
depends on the circuit.
Though a CPU is used in this machine, since the internal operation check of the CPU
is virtually impossible, the operating descriptions of the CPU are omitted. In addition,
since the printed board is not repaired on the customer side in principle, the circuit
descriptions of the printed board are limited to rough descriptions using block diagrams.
is virtually impossible, the operating descriptions of the CPU are omitted. In addition,
since the printed board is not repaired on the customer side in principle, the circuit
descriptions of the printed board are limited to rough descriptions using block diagrams.
Therefore, the circuit descriptions are provided in the following three kinds:
•
Descriptions from the sensor to the input section of the circuit board which is
provided with the control function and the drive function.
•
Descriptions from the output section of the circuit board which is provided with the
control function and the drive function.
•
Descriptions of the block diagram of each function.
including the sensors and the input section of the circuit board which is provided with
the control function and drive function.
the control function and drive function.
Some descriptions may be changed according to modifications on the products, and the
information on any change will be informed by Service Information (Technical Information)
occasionally.
To read this Service Manual and Service Information (Technical Information) issued
occasionally for understanding the machine fully and correctly is an advisable way for
obtaining the skills and knowledge to maintain the product performance for a longer time and
to perform troubleshooting efficiently.
information on any change will be informed by Service Information (Technical Information)
occasionally.
To read this Service Manual and Service Information (Technical Information) issued
occasionally for understanding the machine fully and correctly is an advisable way for
obtaining the skills and knowledge to maintain the product performance for a longer time and
to perform troubleshooting efficiently.
There is a portion currently expressed with the illustration of a conventional model in this
manual.
manual.
Click on the first or last page to see other MX-FN21 / MX-FN22 / MX-PN13 (serv.man3) service manuals if exist.