Service Manuals, User Guides, Schematic Diagrams or docs for : Konica Minolta Copiers 1312 1312ech6
<< Back | HomeMost service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.
Image preview - the first page of the document
>> Download 1312ech6 documenatation <<
Text preview - extract from the document
Chapter 6 Mechanism
6-1. Copy process ....................................................... 6-1
6-2. Front cross-section (Main mechanism
parts layout drawing) .......................................... 6-3
6-3. Drive conveyance system diagram .................... 6-4
Chapter 6 Mechanism
6-1. Copy process
2. Side erase 1. Charging
3. Exposure 7.Main erase
4. Development
7.Cleaning 7.Toner collection
Photosensitive
OPC drum
6.Fixing
5.Transfer 5.Separation 5.Conveyance
8.Paper feed cassette
1. Charging 4. Development
A high voltage of -4 to -5.5KV, output from the high 1) The toner contained in the developer is positively
voltage PCB (UNITHV), is applied on the charge charged when agitated. The charged toner is
corona unit. The grid mesh between the developed (magnetic brush method) when con-
photosensitive OPC drum and charger is grounded via tacted against the OPC drum by the carrier (ferrite)
a 780V Zenner diode, keeping the surface of the and magnet roller. The toner adheres only at the
photosensitive drum constant at -720V. sections of the OPC drum where there is an image,
and creates a visible image. There is a slight
negative charge even at the sections with no image
(white sections), and some toner will adhere. The
bias voltage -170V, output from the high voltage
PCB (UNITHV) is applied on the magnet roller to
prevent this adhesion.
2. Side erase Magnet roller Toner
The non-image area such as the edges during reduc-
tion copy, of the OPC drum surface after charging is
discharged with the side erase lamp.
OPC drum
Side erase lamp Erase light
Reduction
image area Carrier
OPC drum
2) The density of the toner contained in the developer
Non-image area is kept constant by the toner sensor (magnetic
sensor). When the toner sensor detects a low
3. Exposure density, the supply screw provided at the bottom of
The light irradiated from the exposure lamp exposes the the toner box rotates, and the toner is supplied into
photosensitive surface via the six mirrors and lens. the developer.
Toner
Document table glass Document (back side is image)
Developer
No. 2 mirror
Exposure
No. 4 mirror lamp No. 1 mirror
No. 6 mirror No. 3 mirror
No. 5 mirror No. 1 scanner
No. 2 scanner
Slit
OPC drum Supply screw
Toner sensor
6-1
Chapter 6 Mechanism
5. Transfer, separation and conveyance 1 7. Cleaning
1) Transfer 1) Blade cleaning, toner recycle
The paper fed from the paper cassette is conveyed The toner left on the OPC drum after the transfer
between the OPC drum and TC roller. A transfer process is scraped off by the cleaning blade
voltage of -1 to -2KV, output from the high voltage (urethane rubber).
PCB (UNIT HV) is applied on the TC roller, and the The toner scraped off is returned to the developing
paper is negatively charge. As the toner on the unit by the screw conveyor, and is reused.
OPC drum is positively charged, the toner image is
transferred onto the paper. At areas other than the
transfer area, the transfer voltage is changed to a Cleaning blade
positive voltage (600V), so the toner adhered on OPC drum
the transfer roller surface is returned to the OPC
drum.
OPC drum
Toner image Screw conveyor
Transfer roller
Copy paper
2) Main erase lamp
A slight residual potential is left on the OPC drum
surface after the toner is scraped off. As the OPC
drum is repeatedly used, the residual potential is
2) Separation completed erased by the main erase lamp.
As the diameter of the OPC is small at 30mm, the
paper after transfer is naturally separated (curva- Main erase lamp
ture separation) by the firmness of the paper.
Winds up Curvature separation
Drum diameter Drum diameter small
large
Copy paper
3) Conveyance
As the distance between the transfer process and
fusing process in this machine is short, the paper is
conveyed to the fusing process by the regist roller
and transfer roller. 8. Paper feed
The paper in the paper feed cassette is separated by
Regist roller Transfer roller the claws on both edges, and only one sheet is
conveyed into the unit by the paper feed roller (seg-
ment roller). When the paper feed is completed, the
segment roller stops at a position where it does not
contact the paper, so the paper pressing load is
reduced.
Segment roller during paper feed
6. Fixing
The toner image transferred onto the paper is fixed by
the heat roller's heat and pressure roller's pressure.
The fixed paper is peeled off by the separation claws,
and is exited.
Separation claw Copy paper
Heat roller
Segment roller stop position after paper feed
Exit tray
Pressue roller Pressue spring
MODEL MANUAL REVISED EDITION DATA PAGE METHOD
6-2
1312 SERVICE HANDBOOK 1 May.1999 6-2 REPLACEMENT
Chapter 6 Mechanism
1 6-2. Front cross-section (Main mechanism parts layout drawing)
SDH
Paper feed roller S2 sensor Turn roller
Conveyance
S1 sensor Separation roller roller Paper exit roller
No. 2 mirror
Reflector (reflection mirror)
Lens
No. 4 mirror Exposure lamp
No. 1 mirror
No.6 mirror
No. 3 mirror
Side erase lamp
Charge corona unit
No. 5 mirror Shield glass
Main erase (cleaning) lamp Cleaning blade
Developer unit
Heat roller
JAM2 sensor
JAM1 sensor
Pressure (rubber) roller
Paper feed roller Transfer roller OPC drum
Slip roller Regist roller
Paper feed roller
Relay roller
Cassette feeder (option)
MODEL MANUAL REVISED EDITION DATA PAGE METHOD
6-3
1312 SERVICE HANDBOOK 1 May.1999 6-3 REPLACEMENT
Chapter 6 Mechanism
6-3. Drive conveyance system diagram
Developing unit drive gear
Main motor
Heat roller
Regist clutch
OPC drum
Slip roller Paper feed (segment) roller Regist roller
Main motor
Developing unit drive gear
Heat roller
Paper feed (segment) roller
Slip roller Resist roller
Main motor shaft (gear)
OPC drum
Paper feed unit gear
Fixing unit gear
6-4
◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo