Konica Minolta DF-502 User manual

SERVICE MANUAL
2005.04
Ver. 1.0
DF-502
THEORY OF OPERATION
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After publication of this service manual, the parts and mechanism may be subject to change for
improvement of their performance.
Therefore, the descriptions given in this service manual may not coincide with the actual machine.
When any change has been made to the descriptions in the service manual, a revised version will be
issued with a revision mark added as required.
Revision mark:
• To indicate clearly a section revised, show to the left of the revised section.
A number within represents the number of times the revision has been made.
• To indicate clearly a section revised, show in the lower outside section of the correspond-
ing page.
A number within represents the number of times the revision has been made.
NOTE
Revision marks shown in a page are restricted only to the latest ones with the old ones deleted.
• When a page revised in Ver. 2.0 has been changed in Ver. 3.0:
The revision marks for Ver. 3.0 only are shown with those for Ver. 2.0 deleted.
• When a page revised in Ver. 2.0 has not been changed in Ver. 3.0:
The revision marks for Ver. 2.0 are left as they are.
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2005/04 1.0 — Issue of the first edition
Date Service manual Ver. Revision mark Descriptions of revision
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bizhub_162_210_TO.book 2 ページ ２００５年４月１８日 月曜日 午後１時２７分

DF-502OutlineComposition/Operation
Theory of Operation Ver. 1.0 Apr. 2005
i
CONTENTS
Outline
1. Product specification ............................................................................................... 1
Composition/Operation
2. Automatic Document Feeder (DF-502) ................................................................... 3
2.1 Construction ......................................................................................................... 3
2.2 Operation .............................................................................................................. 4
2.2.1 Document Take-Up and Feed ....................................................................... 4
2.2.2 Document Transport...................................................................................... 5
2.3 Electrical Parts Layout .......................................................................................... 6
2.4 Document Separating Mechanism........................................................................ 7
2.5 Document Exit Mechanism ................................................................................... 8
2.6 Document Size Detection Mechanism.................................................................. 9
2.7 Raised/Lowered Position Detection Mechanism................................................... 9
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DF-502
OutlineComposition/Operation
Theory of Operation Ver. 1.0 Apr. 2005
ii
Blank page
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Theory of Operation Ver. 1.0 Apr. 2005 1. Product specification
1
DF-502Outline
Outline
1. Product specification
Types and Sizes of Document
Types of Originals Not Guaranteed for Reliable Feeding
Name Automatic Document Feeder
Installation Inserted in top portion of the copier
Modes Standard = 1-sided original
Mixed Original = 1-sided original
Document Loading Left-hand side, face up
Standard Mixed Original
Ty p e Plain paper (50 to 110 g/m2) Plain paper (60 to 90 g/m2)
Sizes
A3, A4 R, A4, A5 R, B4, B5 R, B5,
11 x 17, 11 x 14, Legal, Letter R, Letter,
Invoice R, and Invoice
A3 and A4, B4 and B5, 11 x 17 and
Letter, Legal and Letter R, Legal and
Invoice, Letter R and Invoice
Document Alignment Center
Capacity 50 sheets max. (80 g/m2)
Power Requirements DC24 V, DC5 V (supplied from the copier)
Power Consumption 36 W or less
Dimensions Width = 598 mm, Depth = 483 mm, Height = 102 mm
Mass 6.3 kg
Operating Environment Conforms to that of the copier
Type of Original Possible Problems
Sheets stapled or clipped together Take-up failure, damaged sheet, defective drive
mechanism due to jammed staples or clips
Sheets glued together Take-up failure, damaged sheet
Sheets folded, torn, or wrinkled Take-up failure, damaged sheet
Sheets severely curled Sheet misfed due to its being dog-eared or fed in
askew
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1. Product specification Theory of Operation Ver. 1.0 Apr. 2005
2
DF-502
Outline
Blank page
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Theory of Operation Ver. 1.0 Apr. 2005 2. Automatic Document Feeder (DF-502)
3
DF-502Composition/Operation
Composition/Operation
2. Automatic Document Feeder (DF-502)
2.1 Construction
[1] Main Motor [4] Registration Rollers
[2] Pick-Up Roller [5] Take-Up Roller
[3] Exit Rollers [6] Take-Up Clutch
4688M502AA
1
2
3
4
5
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2. Automatic Document Feeder (DF-502) Theory of Operation Ver. 1.0 Apr. 2005
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DF-502
Composition/Operation
2.2 Operation
2.2.1 Document Take-Up and Feed
• The document is taken up as the Pick-Up Roller and Take-Up Roller turn.
• The Pick-Up Roller transports the document up to the Take-Up Roller.
• After a scan is completed, the Main Motor is turned backward to raise the Pick-Up Roller.
• The Pick-Up Roller and the Take-Up Roller are turned through the Paper Take-Up Clutch
and by a gear train and a belt driven by the Main Motor.
• The Paper Empty Sensor is used to detect a document loaded on the Document Loading
Tray.
• The Document Stoppers determine the leading edge position of the document loaded on
the Document Loading Tray. They are in the lowered, swung-down position in the
standby state and swing upward when the document is to be taken up.
• The swing-up and swing-down motion of the Document Stoppers is operatively con-
nected to the raising and lowering of the Pick-Up Roller.
Paper Empty Sensor (PC2)
Main Motor (M1)
Pick-Up Roller
Take-Up Roller
Document Stoppers
Paper Take-Up Clutch (CL1)
4688M005AA
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