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SERVICE MANUAL
CODE: 00ZAL840//B1E
BASIC MANUAL
DIGITAL COPIER
MODEL AL-800/840
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
Parts marked with "!" is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
[ 1 ] OPERATING PRINCIPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. Outline of operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
A. Paper path and imaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
B. Image process and data flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
3. Operations of each section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5
A. Paper feed, paper transport section . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
B. Scanner (reading) section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
C. Scanner (writing) section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
D. Image process section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
E. Fusing/paper exit section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
F. Drive section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-27
G. Electrical section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
CONTENTS