Canon NP6330 Service Manual page 4

Chapter 9 Installation introduces requirements for the site of installation, and
shows how the copier may be installed using step-by-step instructions.
Chapter 10 Maintenance and Inspection provides tables of periodically replaced
parts and consumables/durables and scheduled servicing charts.
Chapter 11 Troubleshooting provides tables of maintenance/inspection,
standards/adjustments, and problem identification (image fault/malfunction).
Appendix contains a general timing chart and general circuit diagrams.
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,
signal name accompanies the symbol
of the electric signal.
The expression "turn on the power" means flipping on the power switch, closing
the front door, and closing the delivery door, which results in supplying the copier
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 practically all cases, the internal mechanisms of a microprocessor cannot be
checked in the field. Therefore, the operations of the microprocessors used in the
copiers 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 reasons, 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 copier.
ii
represents the path of mechanical drive—where a
COPYRIGHT © 1997 CANON INC.
, the arrow indicates the direction
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)