MX-FN27. Service Manual for N Version - Sharp Copying Equipment Service Manual (repair manual). Page 4

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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.
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.
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.
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'.
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.
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.
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 
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.
Turn on the power.
Install the cable/wire to the cable guide or 
wire saddle.
Turn off the power.
Remove the screw.
Loosen the screw.
Install the screw.
Tighten the screw.
Cleaning is needed.
Measurement is needed.
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