Read Sharp MX-FN27 Service Manual online
Symbols in this manual
The lists of symbols used in this manual are shown below.
The meaning of each symbol described in the table must be understood for proper servicing
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific
functions and the relationship between electrical and mechanical
systems with reference to the timing of operation.
systems with reference to the timing of operation.
In the diagrams, represents the path of mechanical drive; where
a signal name accompanies the symbol, the arrow indicates the
direction of the electric signal.
direction of the electric signal.
The expression "turn on the power" means flipping on the power
switch, closing the front door, and closing the delivery unit door,
which results in supplying the machine with power.
which results in supplying the machine with power.
2. In the digital circuits, '1' is used to indicate that the voltage level
of a given signal is "High", while '0' is used to indicate "Low".
(The voltage value, however, differs from circuit to circuit.) In
addition, the asterisk (*) as in "DRMD*" indicates that the DRMD
signal goes on when '0'.
(The voltage value, however, differs from circuit to circuit.) In
addition, the asterisk (*) as in "DRMD*" indicates that the DRMD
signal goes on when '0'.
In practically all cases, the internal mechanisms of a micropro-
cessor cannot be checked in the field. Therefore, the operations
of the microprocessors used in the machines are not discussed:
they are explained in terms of from sensors to the input of the
DC controller PCB and from the output of the DC controller PCB
to the loads.
of the microprocessors used in the machines are not discussed:
they are explained in terms of from sensors to the input of the
DC controller PCB and from the output of the DC controller PCB
to the loads.
The descriptions in this Service Manual are subject to change
without notice for product improvement or other purposes, and
major changes will be communicated in the form of Service Infor-
mation bulletins.
without notice for product improvement or other purposes, and
major changes will be communicated in the form of Service Infor-
mation bulletins.
All service persons are expected to have a good understanding of
the contents of this Service Manual and all relevant Service Infor-
mation bulletins and be able to identify and isolate faults in the
machine.
the contents of this Service Manual and all relevant Service Infor-
mation bulletins and be able to identify and isolate faults in the
machine.
Symbols
Explanation
Symbols
Explanation
Check.
Remove the claw.
Check visually.
Insert the claw.
Check a sound.
Push the part.
Disconnect the connector.
Connect the power cable.
Connect the connector.
Disconnect the power cable.
Remove the cable/wire from the cable
guide or wire saddle.
guide or wire saddle.
Turn on the power.
Install the cable/wire to the cable guide or
wire saddle.
wire saddle.
Turn off the power.
Remove the screw.
Loosen the screw.
Install the screw.
Tighten the screw.
Cleaning is needed.
Measurement is needed.
1x
1x
1x
1x
1x
1x
1x
1x
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