Canon NP6320 Service Manual page 269

OPERATIONS AND TIMING
In outline diagrams,
electrical signal paths.
Signals in digital circuits are identified as '1' for High and '0' for Low. The voltage of
signals, however, depends on the circuit.
Nearly all operations of the paper deck pedestal are controlled by microprocessors;
the internal workings of these processors are not relevant to the service person's work
and, therefore, left out of the discussions. By the same token, no repairs are prescribed
for the PCBs at the user's premises; for this reason, PCBs are discussed by means of
block diagrams rather than circuit diagrams.
For the purpose of explanation, discussions are divided into the following: from sen-
sors to DC controller PCB input ports; from DC controller output ports to loads; and
minor control circuits and functions.
I. BASIC CONSTRUCTIONS ...... 2-1P
A. Outline of Electrical
Circuitry .............................. 2-1P
B. Inputs to and Outputs from
Paper Deck Controller ........ 2-2P
COPYRIGHT © 1999 CANON INC.
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CHAPTER 2
represents mechanical drive paths, and (
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
C. Outline ................................ 2-4P
D. Pick-Up and Feed
Operations .......................... 2-5P
E. Releasing the Pick-Up and
Separation Rollers ............. 2-7P
) indicates