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Explanation of Symbols
The following symbols are used throughout this Service Manual.
Symbols
Explanation
Symbols
Explanation
Used to show permission.
Remove the screw.
Used to show prohibition.
Tighten the screw.
Check.
Remove the claw.
Check visually.
Insert the claw.
Check the noise.
Use the bundled part.
Disconnect the connector.
Push the part.
Connect the connector.
Plug the power cable.
Remove the cable/wire
from the cable guide or wire
saddle.
Turn on the power.
Set the cable/wire to the
cable guide or wire saddle.
T-0-1
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 microprocessor 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 Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service
Manual and all relevant Service Information bulletins and be able to identify and isolate faults
in the machine.
Содержание Color imageCLASS MF8280Cw
Страница 12: ...1 1 Product Overview Product Overview Product Lineups Product Features Specifications Name of Parts ...
Страница 317: ...5 5 Adjustment Adjustment Overview Adjustment at Parts Replacement ...
Страница 326: ...6 6 Trouble Shooting Trouble Shooting Test Print Trouble shooting items Special Management Mode Version Upgrade ...
Страница 340: ...7 7 Error codes Error codes Overview Error Codes Jam Code ...
Страница 349: ...8 8 Service Mode Service Mode Overview COPIER FEEDER FAX TESTMODE ...
Страница 394: ... Special Tools Solvents and Oils General Circuit Diagram Backup Data Appendex ...