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FrameMaker Ver.5.5E(PC) COVER [GENERAL] FOR Di350 98.12.25

FrameMaker Ver.5.5E(PC) COVER [GENERAL] FOR Di350 98.12.25

Di350
SERVICE MANUAL

Di350 SERVICE MANUAL

[GENERAL]

[GENERAL]

Copyright 1999 MINOLTA Co., Ltd. Printed in Japan
Use of this manual should be strictly supervised to avoid disclosure of confidential information.

MINOLTA Co., Ltd.

1171-7990-11 99023000 17196

FrameMaker Ver.5.5(PC) Di350 98.12.25

INDEX (GENERAL) GENERAL

MECHANICAL/ELECTRICAL

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

Di350
GENERAL

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

CONTENTS
1. 2. 3. 4. 5. 6. 7. SAFETY INFORMATION ................................................................................. G-1 SPECIFICATIONS ........................................................................................... G-8 PRECAUTIONS FOR INSTALLATION ............................................................ G-10 PRECAUTIONS FOR USE .............................................................................. G-11 HANDLING OF THE CONSUMABLES ........................................................... G-12 OTHER PRECAUTIONS ................................................................................. G-12 SYSTEM OPTIONS ......................................................................................... G-13

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBG0100A

1

SAFETY INFORMATION

Laser Safety
This is a digital machine which prints by means of a laser. There is no possibility of danger from the laser, provided the machine is operated according to the instructions in this manual. Since radiation emitted by the laser is completely confined within protective housing, the laser beam cannot escape from the machine during any phase of user operation. This machine is certified as a Class 1 product. This means the machine does not produce hazardous laser radiation. CAUTION: The use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. Because of this, Minolta strongly recommends that you operate your copy machine only as described in this documentation.

Internal Laser Radiation
Maximum Average Radiation Power: 36.7µW at laser aperture of the print head unit Wavelength: 770-810nm This product employs a Class IIIb Laser Diode that emits an invisible laser beam. The Laser Diode and Scanning Polygon Mirror are incorporated in the print head unit. The print head unit is NOT A FIELD SERVICE ITEM. Therefore, the print head unit should not be opened under any circumstances. Laser Aperture of the Print Head Unit

1166O263AA

This figure shows the view inside the Right Side Door with the Imaging Unit removed.

For United States
CDRH regulation This copier is certified as a Class 1 Laser product under the Radiation Performance Standard according to the Food, Drug and Cosmetic Act of 1990. Compliance is mandatory for Laser products marketed in the United States and is reported to the Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration of the U.S. Department of Health and Human Services (DHHS). This means that the device does not produce hazardous laser radiation.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

The label shown on page G-3 indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States. CAUTION: Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. This is a semiconductor laser. The maximum power of the laser diode is 5mW and the wavelength is 770-810nm. For Europe CAUTION: Use of controls, adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. This is a semiconductor laser. The maximum power of the laser diode is 5mW and the wavelength is 770-810nm. For Denmark ADVARSEL Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. Klasse 1 laser produkt der opfylder IEC60825 sikkerheds kravene. For Finland LUOKAN 1 LASERLAITE VAROITUS Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle. VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättomälle lasersäteilylle. Älä katso säteeseen. For Sweden KLASS 1 LASER APPARAT VARNING Om apparaten används på annat sätt än i denna bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1. VARNING Osynlig laserstråining när denna del är öppnad och spärren är urkopplad. Betrakta ej stråien.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

For Norway ADVERSEL Dersom apparatet brukes på annen måte enn spesifisert i denne bruksanvisning, kan brukeren utsettes för unsynlig laserstrålning, som overskrider grensen for laser klass 1. Dette en halveder laser. Maksimal effekt till laserdiode er 5mW og blgelengde er 770810nm.

Laser Safety Label
A laser safety label is attached to the outside of the copy machine as shown below. Laser safety label For Europe

CLASS 1 LASER PRODUCT LASER KLASSE 1 PRODUKT

For United States
MINOLTA CO., LTD
2, Higashiakatsuchi, Yawata-cho, Toyokawa-shi Aichi-ken 442-8585, Japan

MANUFACTURED:

Manufacturer's Name Plate

1166O261DA

THIS PRODUCT COMPLIES WITH 21 CFR CHAPTER I, SUBCHAPTER J.
0946-7101-14

1166O248AA

The Manufacturer's Name Plate is affixed at the position illustrated above. Please write down the Model Name and Serial No. of your copier here. Model: Serial No.:

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

Label inside copy machine
The following laser safety label will be attached inside the copy machine as shown below. Please read the following for your own protection.

Caution Opening the cover indicated by the Caution label may expose you to harmful laser radiation which could cause damage or loss of eyesight. Do not open the cover when the power is on.

1166O234AA

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

ALL Areas CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Germany only VORSICHT! Explosinsgefahr bei unsachgemäßen austausch der batterie. Ersatz nur durch denselben oder einen vom hersteller empfohlenen ähnlichen typ. Entsorgung gebrauchter batterien nach angaben des herstellers. Denmark only ADVARSEL! Lithiumbatteri - Eksplosionsfare ved fejlagtig håndtering Udskiftning må kun ske med batteri af samme fabrikat og type. Levér det brugte batteri tilbage til leverandøren. Norway only ADVARSEL Eksplosjonsfare ved feilaktig skifte av batteri. Benytt samme batteritype eller en tilsvarende type anbefalt av apparatfabrikanten. Brukte batterier kasseres i henhold til fabrikantens instruksjoner. Sweden only VARNING Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en ekvivalent typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt fabrikantens instruktion. Finland only VAROlTUS Paristo voi räjähtää, los se on virheellisesti asennettu. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä Käytetty paristo valmistajan ohjeiden mukaisesti.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

ALL Areas CAUTION "Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used IC Package according to the manufacturer's instructions." Germany only VORSICHT! "Austausch nur durch denselben oder einen vom Hersteller empfohlenen, gleichwertigen typ. Entsorgung gebrauchter Batterien nach Angaben des Herstellers.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

Service Precautions
(1) Precautions Refer to DISASSEMBLY/CLEANING for the Disassembly procedure. 1. When unplugging connectors on the P.W.B.s themselves, always make sure the power is OFF first. Be sure to unplug the copier before disassembling and cleaning. 2. Always unplug connectors by holding the connector housing. Pulling on the wires can lead to problems with poor contact. 3. It is recommended that a body ground not be used when carrying out any troubleshooting procedure. Be sure to ground DC lines to a ground test point on the P.W.B. (2) At Replacement/Adjustment/Cleaning 1. Be sure to handle the Fusing Unit carefully. It remains hot a while after the copier is turned off. 2. Do not disassemble the Imaging Cartridge or Print Head Unit. 3. Do not expose the PC Drum of the Imaging Cartridge to direct sunlight or to room lighting for more than 5 minutes. 4. Turn off the power before removing the Print Head Unit to protect the eyes from possible exposure to the laser beam. 5. Use only a Fuse of the indicated rating. (3) During Operation 1. Keep your hands, clothing, etc. well away from operating or rotating parts. 2. Never touch the terminals of electrical parts or high voltage parts. 3. This copier uses an invisible laser beam. To prevent a laser beam leak, the copier performs a trial run to make sure the covers are in position.

Handling the P.W.B.
Observe the following precautions when handling a P.W.B. with ICs. (1) During Transportation/Storage 1. During transport and storage, P.W.B.s should be kept in conductive bags or on mats and not taken out unless absolutely necessary. 2. P .W.B.s should be stored in a place where direct sunlight does not strike them. 3. Do not touch IC terminals with your hands. (2) At Replacement 1. Before removing connectors from a P.W.B., make sure the copier has been unplugged. 2. When P.W.B.s are taken out of their conductive bags or off their mats, hold them by their edges to avoid touching the terminals or the patterned surfaces. 3. Before installing connectors on a P .W.B., make sure the copier has been unplugged.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBG0200A

2
TYPE

SPECIFICATIONS
: : : : : Console/Desktop Type Organic Photoconductor Electrostatic Dry Powdered Image Transfer to Plain Paper with a Laser 600 dpi 3-way system Manual Feed Tray: Single sheet feeding Multi-Purpose (MP) Cassette: Plain paper: Approx. 250 sheets Special paper: Approx. 20 sheets 500-Sheet Cassette: Approx. 500 sheets

PHOTOCONDUCTOR COPYING SYSTEM ORIGINAL SCANNING RESOLUTION PAPER FEEDING SYSTEM

EXPOSURE SYSTEM DEVELOPING SYSTEM CHARGING SYSTEM IMAGE TRANSFER PAPER SEPARATING SYSTEM FUSING SYSTEM PAPER DISCHARGING SYSTEM MAXIMUM ORIGINAL SIZE COPY MEDIUM

: : : : : : : :

Mirror Scanning, Slit Exposure MT-HG System Comb Electrode (1) DC Negative Corona with Scorotron System Roller Image Transfer Paper Separator Fingers and Charge Neutralizing Plate Heat Roller Charge Neutralizing Brush A3L, 11" × 17"L

Paper Source Plain paper (60 to 90 g/m ) Transparencies Medium Thick paper (91 to 157 Postcards (190 g/m2) g/m2)
2

MP Cassette r r r r r 297 × 432 mm 90 × 140 mm

Manual Feed Tray r r r r r 297 × 432 mm 90 × 140 mm

Recycled paper Dimensions
m: Permissible

Maximum (Width × Length) Minimum (Width × Length)
-: Not permissible

MULTIPLE COPIES WARMING-UP TIME FIRST COPY TIME

: : :

1 to 999 70 sec. or less with room temperature of 23°C and rated power voltage 4.7 sec. (A4C, MP Cassette, full size mode) 4.7 sec. (8-1/2" × 11"C, MP Cassette, full size mode)

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

CONTINUOUS COPY SPEED (copies/min.) - Metric Size A3L B4L A4L A4C B5L B5C ZOOM RATIOS - Metric - Inch × 1.000 × 1.000 × 2.000 × 2.000 × 1.414 × 1.545 Enlargement × 1.224 × 1.294 × 1.154 × 1.214 × 0.866 × 0.785 × 0.816 × 0.733 Reduction × 0.707 × 0.647 × 0.500 × 0.500 25% to 400% (in 0.1% increments) Full Size : : : Through Lens (F = 4.0, f = 62 mm) Fluorescent Lamp 190°C Speed 20 23 27 35 30 40 - Inch Size 11" × 17"L 8-1/2" × 14"L 8-1/2" × 11"L 8-1/2" × 11"C Speed 20 23 28 35

Fixed

Variable LENS EXPOSURE LAMP

FUSING TEMPERATURE

POWER/CURRENT CONSUMPTION (Copier Only) Exposure Lamp (Rating) 24V 20W POWER REQUIREMENTS Fusing Roller Heater Lamp (Rating) 775W : Max. Power Consump- Max. Current Contion (full system) sumption (full system) 1050W 120V, 10A 230V, 5A

120V, 230V, 50/60Hz

ENVIRONMENTAL CONDITIONS Temperature Humidity Ambient Illumination Levelness DIMENSIONS 10 to 32°C with a fluctuation of 10°C or less per hour 15 to 85% RH with a fluctuation of 10% RH or less per hour 3,000 lux or less 1° (1.75 mm/100 mm) : Width ... 616 mm, 24-1/4" Depth ... 707 mm, 27-3/4" Height ... 635 mm, 25" 55.5 kg, 122-1/4 lbs.

WEIGHT

:

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBG0300A

3

PRECAUTIONS FOR INSTALLATION

Installation Site To ensure safety and utmost performance of the copier, the copier should NOT be used in a place: · Where it will be subjected to extremely high or low temperature or humidity. · Which is exposed to direct sunlight. · Which is in the direct air stream of an air conditioner, heater or ventilator. · Which puts the operator in the direct stream of exhaust from the copier. · Which has poor ventilation. · Where ammonia gas might be generated. · Which does not have a stable, level floor. · Where it will be subjected to sudden fluctuations in either temperature or humidity. If a cold room is quickly heated, condensation forms inside the copier, resulting in blank spots in the copy. · Which is near any kind of heating device. · Where it may be splashed with water. · Which is dirty or where it will receive undue vibration. · Which is near volatile flammables or curtains. Power Source Use an outlet with a capacity of 120V/10A, or 220V to 240V/5A or more. · If any other electrical equipment is sourced from the same power outlet, make sure that the capacity of the outlet is not exceeded. · Use a power source with little voltage fluctuation. · Never connect by means of a multiple socket any other appliances or machines to the outlet being used for the copier. · Make the following checks at frequent intervals: VIs the power plug abnormally hot? VAre there any cracks or scrapes in the cord? VHas the power plug been inserted fully into the outlet? VDoes something, including the copier itself, ride on the power cord? · Ensure that the copier does not ride on the power cord or communications cable of other electrical equipment, and that it does not become wedged into or underneath the mechanism. Grounding To prevent receiving electrical shocks in the case of electrical leakage, always ground the copier. · Connect the ground wire to: VThe ground terminal of the outlet. VA grounding contact which complies with the local electrical standards. · Never connect the ground wire to a gas pipe, the ground wire for a telephone, or a water pipe.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBG0400A

4

PRECAUTIONS FOR USE

To ensure that the copier is used in an optimum condition, observe the following precautions. · Never place a heavy object on the copier or subject the copier to shocks. · Insert the power plug all the way into the outlet. · Do not attempt to remove any panel or cover which is secured while the copier is making copies. · Do not turn OFF the Power Switch while the copier is making copies. · Provide good ventilation when making a large number of copies continuously. · Never use flammable sprays near the copier. · If the copier becomes inordinately hot or produces abnormal noise, turn it OFF and unplug it. · Do not turn ON the Power Switch at the same time when you plug the power cord into the outlet. · When unplugging the power cord, do not pull on the cord; hold the plug and pull it out. · Do not bring any magnetized object near the copier. · Do not place a vase or vessel containing water on the copier. · Be sure to turn OFF the Power Switch at the end of the workday or upon power failure. · Use care not to drop paper clips, staples, or other small pieces of metal into the copier. Operating Environment The operating environmental requirements of the copier are as follows: · Temperature: 10°C to 32°C with a fluctuation of 10°C per hour · Humidity: 15% to 85% RH with a fluctuation of 10% RH per hour Power Requirements The power source voltage requirements are as follows: · Voltage Fluctuation: AC120/220-240V ±10% (Copying performance assured) +10% (Paper feeding performance assured) -15% · Frequency Fluctuation: 50/60 Hz ±0.3%

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBG0500A

5

HANDLING OF THE CONSUMABLES

Before using any consumable, always read the label on the container carefully. · Use the right toner. The applicable copier model name is indicated on the toner bottle. · Paper is easily damaged by dampness. To prevent absorption of moisture, store paper, which has been removed from its wrapper but not loaded into the drawer, in a sealed plastic bag in a cool, dark place. · Keep consumables out of the reach of children. · Do not touch the PC Drum with bare hands. · Store the paper, toner, and other consumables in a place free from direct sunlight and away from any heating apparatus. · The same sized paper is of two kinds, short grain and long grain. Short grain paper should only be fed through the copier crosswise, long grain paper should only be fed lengthwise. · If your hands become soiled with toner, wash them with soap and water immediately. · Do not throw away any used consumables (PC Drum, starter, toner, etc.). They are to be collected.

NOTE Do not burn, bury in the ground, or throw into the water any consumables (PC Drum, starter, toner, etc.).

1171SBG0600A

6

OTHER PRECAUTIONS

The Print Head Unit of this copier uses a laser diode that emits a laser beam. Use the following precautions when performing service jobs at the users' premises. · When a service job needs to be performed in the laser beam path, such as when working around the Print Head Unit and PC Drum, be sure first to turn the copier OFF. · If the job requires that the power cord be left plugged in, observe the following precautions 1. Take off your watch, ring, and any other reflective object and wear laser protective goggles. 2. At the job site, select a place that is as far as possible away from the users and that is enclosed by walls. 3. Do not bring a highly reflective tool into the laser beam path during the service job.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBG0700A

7

SYSTEM OPTIONS
11 1 2

1166O014AA

1166O008AA

5

1166O120AA

3

10
1145M035AA

1171M036AA

7, 8 4
1166O121AA 1166O009AA

9

6

4608D018AA 1166O012AA

1166O010AB

1. 2. 3. 4. 5. 6.

Duplexing Document Feeder (AFR-14) Automatic Document Feeder (AF-7) Plug-In Counter Printer Controller (Pi3500) Duplex Unit (AD-10) V Large Capacity Cabinet (PF-106)

7. Paper Feed Unit (PF-108) 8. Paper Feed Unit (PF-110) 9. Job Tray (JS-200) 10. Mailbin Finisher (FN-500) 11. Finisher (FN-100)

V See the option service manual for the details of AD-10.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

Di350
MECHANICAL/ ELECTRICAL

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

CONTENTS
1. 2. 3. 4. 5. 6. 7. CROSS-SECTIONAL VIEW ............................................................................ M-1 COPYING PROCESS ...................................................................................... M-2 DRIVE SYSTEM .............................................................................................. M-4 OPERATING SEQUENCE .............................................................................. M-5 CPU OVERRUN MONITOR FUNCTION ......................................................... M-8 IMAGE STABILIZATION SYSTEM .................................................................. M-9 IMAGING CARTRIDGE (I/C) ........................................................................... M-10 7-1. I/C Drive Mechanism ............................................................................... M-11 7-2. Identification and Life of I/C ..................................................................... M-11 PC DRUM ........................................................................................................ M-12 DRUM CHARGING .......................................................................................... M-13 ERASE LAMP .................................................................................................. M-14 IR SECTION .................................................................................................... M-15 11-1. Exposure Section: Construction and Function ....................................... M-16 11-2. Image Processing Flow .......................................................................... M-17 11-3. Original Size Detection ........................................................................... M-18 11-4. Original Size Detection Timing ............................................................... M-20 11-5. Scanner and 2nd/3rd Mirrors Carriage Moving Mechanism ................... M-21 PH SECTION ................................................................................................... M-22 12-1. PH Components ..................................................................................... M-23 12-2. Laser Emission Timing (SOS Signal) ..................................................... M-24 DEVELOPING UNIT ........................................................................................ M-25 13-1. Sleeve/Magnet Roller ............................................................................. M-26 13-2. Developing Bias ...................................................................................... M-27 13-3. ATDC Sensor ......................................................................................... M-28 13-4. Sub Hopper Toner Replenishing Mechanism ......................................... M-29 13-5. Sub Hopper Toner Empty Detecting Mechanism ................................... M-30 13-6. Main Hopper Toner Replenishing Mechanism ....................................... M-31 13-7. I/C Cooling Fan Motor ............................................................................ M-32 13-8. Ozone Fan Motor .................................................................................... M-32 PAPER TAKE-UP/FEED SECTION ................................................................ M-33 14-1. MP Cassette Paper Lifting Plate ............................................................. M-33 14-2. MP Cassette-in-Position Detection ......................................................... M-34 14-3. MP Cassette Paper Empty Detection ..................................................... M-35 14-4. MP Cassette Paper Size Detection ........................................................ M-36 14-5. Paper Take-Up Mechanism .................................................................... M-37 14-6. Manual Bypass Tray ............................................................................... M-37 14-7. Paper Take-Up Retry Mechanism .......................................................... M-38 SYNCHRONIZING ROLLERS ......................................................................... M-39 15-1. Synchronizing Roller Drive Mechanism/Control ..................................... M-39 15-2. Paper Dust Remover .............................................................................. M-40 IMAGE TRANSFER AND PAPER SEPARATION ........................................... M-41 PC DRUM PAPER SEPARATOR FINGERS ................................................... M-42 PC DRUM CLEANING ..................................................................................... M-43

8. 9. 10. 11.

12.

13.

14.

15.

16. 17. 18.

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

19. FUSING UNIT .................................................................................................. M-44 19-1. Drive Mechanism .................................................................................... M-45 19-2. Fusing Rollers Pressure Mechanism ...................................................... M-45 19-3. Fusing Temperature Control ................................................................... M-46 19-4. CPM Control ........................................................................................... M-47 20. PAPER EXIT UNIT .......................................................................................... M-48 21. FUSING COOLING FAN MOTOR ................................................................... M-49 22. POWER UNIT COOLING FAN MOTOR .......................................................... M-50

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FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0100A

1

CROSS-SECTIONAL VIEW
1 2 3 4 5 6 7 8 9

10

26 11 12 13 14 15 16 17 18 19 20 21 22

25 1. 2nd Mirror 2. 3rd Mirror 3. Exposure Lamp 4. 1st Mirror 5. Lens 6. CCD Unit 7. Paper Exit Roller 8. Fusing Roller Thermostat (TS1) 9. Fusing Roller Heater Lamp (H1) 10. Paper Exit Sensor (PC3) 11. Right Fusing Roller 12. Duplex Unit Transport Roller 1 13. Left Fusing Roller 14. Duplex Unit Transport Sensor (PI1)

24

23

1171M037AA

15. Fusing Cooling Fan Motor (M3) 16. Duplex Unit Transport Roller 2 17. Image Transfer Roller 18. Synchronizing Roller 19. Synchronizing Roller Sensor (PC2) 20. Manual Feed Paper Take-Up Sensor (PC8) 21. Manual Feed Paper Take-Up Roll 22. Vertical Transport Roller 23. Paper Separator Pad 24. Paper Take-Up Roll 25. Imaging Cartridge (I/C) 26. PH Unit

M-1

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0200A

2

COPYING PROCESS
15. Paper Exit 14. Fusing

3. Photoelectric Conversion Section 13. Erase 4. HGB Board 2. Drum Charging

12. Cleaning 11. Duplex Unit

10. Paper Separation 5. MFB Board 6. Laser Exposure 1. PC Drum 9. Image Transfer 7. Development 8. Paper Feed 8. Paper Feed

1. PC Drum · The drum is an aluminum cylinder coated with photosensitive material on which an electrostatic latent image is produced. 2. Drum Charging · A scorotron charger employing a comb electrode generates a negative DC charged layer on the surface of the PC Drum. 3. Photoelectric Conversion Section · The Exposure Lamp directs light onto the original. The light reflected off the original is directed and resized by the mirrors and lens so as to produce a reduced-size image on the CCD Sensor. 4. HGB Board · Converts an electric signal into a corresponding 8-bit digital image signal (A/D conversion), makes various corrections, and outputs the results to the MFB Board. 5. MFB Board · Compresses the image data received from the HGB Board, stores it, and uncompresses it. 6. Laser Exposure · The laser beam emitted from the LD (laser diode) strikes the surface of the PC Drum, creating an electrostatic latent image. 7. Development · Negatively charged toner adheres to the latent image on the PC Drum surface, creating a visible image. 8. Paper Feed · Feeds sheets of paper from the appropriate paper source. 9. Image Transfer · An Image Transfer Roller is used. A positive charge applied to the roller causes the visible image on the surface of the PC Drum to transfer onto the front side of the paper.

M-2

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

10. Paper Separation · The PC Drum Separator Fingers remove paper from the surface of the PC Drum. 11. Duplex Unit · Makes 2-sided copies. 12. Cleaning · The Cleaning Blade scrapes residual toner off the surface of the PC Drum and the toner is recycled back to the Developing Unit. 13. Erase · The PC Drum is exposed to light, which effectively removes any residual charge from the drum surface. 14. Fusing · Heat and pressure applied by the Right and Left Fusing Rollers fuse toner on the paper. 15. Paper Exit · Feeds paper out of the copier.

M-3

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0300A

3

DRIVE SYSTEM
A

B

C

1171M024AB

A. Scanner Motor (M5) Drives the Scanner and 2nd/3rd Mirrors Carriage. B. I/C Motor (M1) Drives the I/C Unit. C. Main Motor (M2) Drives the Paper Take-Up Roll, Manual Feed Paper Take-Up Roll, Synchronizing Roller, Image Transfer Roller, and Fusing Unit.

M-4

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0400A

4

OPERATING SEQUENCE

A The power cord is plugged into the power outlet.
ON The Power Supply Unit outputs DC24V for the Dehumidifying Heater (option).

B The Power Switch is turned ON.
ON ON DC voltage output Control panel display ON Approx. 560 msec. Fusing Roller Heater Lamp

C

The warming-up cycle is completed.
Main Motor Approx. 20 sec. OFF Predrive stops Power Unit Cooling Fan Motor turns at half speed.

ON

ON

Power Unit Cooling Fan Motor turns at full speed. Developing bias (DC) ON Approx. 100 msec. ON ON I/C Motor I/C Cooling Fan Motor

Image transfer output: - voltage ON Approx. 700 msec. Image transfer output: + voltage ON Approx. 400 msec.

ON Approx. 400 msec.

Image transfer output: - voltage

Image transfer output: + voltage

ON Approx. 400 msec.

Image transfer output: - voltage

T/C ratio is checked for abnormality for approx. 28 sec.

Normal T/C Abnormal T/C: approx. 31 sec. OFF OFF I/C Motor I/C Cooling Fan Motor Image transfer output Approx. 15 min. OFF Developing bias (DC)

OFF Approx. 400 msec.

M-5

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

D

The Start key is pressed.
Polygon Motor Fusing Cooling Fan Motor ON Approx. 6 sec. Laser ON Developing bias (DC) ON Approx. 100 msec. Image transfer output: - voltage

ON ON

Approx. 1.1 sec.

ON

Image transfer current value for non-printing timing between sheets of paper

ON ON Approx. 140 msec. ON

I/C Motor I/C Cooling Fan Motor Main Motor The Power Unit Cooling Fan Motor turns at full speed. The Ozone Fan Motor turns at full speed.

ON Approx. 700 msec.

Paper Take-Up Solenoid

E

The Synchronizing Roller Sensor is activated.
OFF Approx. 110 msec. Paper Take-Up Solenoid

ON VSYNC signal ON: approx. 50 msec. later ON ON

Paper Take-Up Solenoid Synchronizing Clutch Developing bias (AC) Approx. 160 msec. ON

Approx. OFF 90 msec.

Paper Take-Up Solenoid

Image transfer current value for printing

F

The Synchronizing Roller Sensor is deactivated.
OFF Approx. 130 msec. OFF Approx. 170 msec. ON Approx. 320 msec. Synchronizing Clutch Developing bias (AC) Image transfer output: - voltage

OFF Approx. I/C Motor 650 msec. OFF I/C Cooling Fan Motor Approx. 15 min. Laser OFF Developing bias (DC)

OFF

M-6

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

D

The Start key is pressed.
Polygon Motor Fusing Cooling Fan Motor ON Approx. 6 sec. Laser ON Developing bias (DC) ON Approx. 100 msec. Image transfer output: - voltage

ON ON

Approx. 1.1 sec.

ON

Image transfer current value for non-printing timing between sheets of paper

ON Approx. 140 msec. ON

I/C Motor Main Motor The Power Unit Cooling Fan Motor turns at full speed. The Ozone Fan Motor turns at full speed.

ON Approx. 700 msec.

Paper Take-Up Solenoid

E

The Synchronizing Roller Sensor is activated.
OFF Approx. 110 msec. Paper Take-Up Solenoid

ON VSYNC signal ON: approx. 50 msec. later ON ON

Paper Take-Up Solenoid Synchronizing Clutch Developing bias (AC) Approx. 160 msec. ON

Approx. OFF 90 msec.

Paper Take-Up Solenoid

Image transfer current value for printing

F

The Synchronizing Roller Sensor is deactivated.
OFF Approx. 130 msec. OFF Approx. 170 msec. ON Approx. 320 msec. Synchronizing Clutch Developing bias (AC) Image transfer output: - voltage

OFF Approx. 650 msec.

I/C Motor Approx. 15 min. OFF Developing bias (DC)

OFF

Laser

M-6

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

G

The Paper Exit Sensor is deactivated.
OFF Approx. 680 msec. OFF Main Motor The Power Unit Cooling Fan Motor turns at half speed. Polygon Motor Approx. 10 sec. Approx. 20 sec. OFF OFF Ozone Fan Motor Fusing Cooling Fan Motor

M-7

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0500A

5

CPU OVERRUN MONITOR FUNCTION

· CPU Overrun Monitor Function (Watchdog Function) The watchdog function is a self-monitoring function that determines whether any of the CPUs mounted on the control board overrun. · If this function detects that a CPU overruns, the copier automatically resets the CPU, thereby restarting the logic circuit and mechanism. · Even if a copier CPU operates erratically due to electrical noise, therefore, the copier is able to recover from the faulty condition so that the number of visits made by the Tech. Rep. for CPU overrun can be minimized. · Processing performed during watchdog function: If a faulty condition is detected, the copier resets the CPU and performs a restart sequence. Since this sequence of operations is performed even during a copy cycle, the copier detects a sheet or sheets of paper left inside it as a misfeed while it is being restarted.

M-8

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0600A

6

IMAGE STABILIZATION SYSTEM

· The following image stabilization controls are provided to ensure stabilized copy image. Item PC Drum temperature correction Purpose Control

To compensate for any change The I/C Thermistor is used to in ID due to changing PC Drum detect temperature and, temperatures. according to the detected temperature, Vg/Vb is corrected. To compensate for degraded Corrects Vg according to the sensitivity caused by a deterio- period of time during which the rating PC Drum. PC Drum has turned.

PC Drum deterioration correction

PC Drum Charge Corona

I/C Thermistor (TH2)

PC Drum
Grid Voltage: (Vg) PC Drum Revolution Counter

Sleeve/ Magnet Roller

Developing Bias: (Vb)

CPU
1171M028AA

M-9

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0700A

7

IMAGING CARTRIDGE (I/C)

· This copier employs an Imaging Cartridge ("I/C" in this manual) that contains a PC Drum, PC Drum Charge Corona, Developing Unit, and Cleaning Unit as one unit.

1171M002AA

1171M001AA

Toner Supply Port

1171M003AA

ATDC Sensor (E1)

M-10

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0701A

7-1.

I/C Drive Mechanism

· Drive from the I/C Motor is transmitted via a gear train to the PC Drum and Hopper.

PC Drum Drive Gear

I/C Motor (M1)

Hopper Drive Gear

1171M004AA

Electrical Component M1
1171SBM0702A

Control Signal PJ16A-3

ON L

OFF H

7-2.

Identification and Life of I/C

· When the Start key is pressed or the Side Cover is opened and closed, the copier determines whether the I/C is new or one which has been used previously. · The copier monitors the I/C life by storing in memory the period of time during which the PC Drum has turned. The data is cleared when a new I/C is installed in the copier.

M-11

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0800A

8

PC DRUM

· The PC Drum used in this copier is the organic photoconductor (OPC) type. The drum consists of an aluminum base coated with a charge generation layer and a charge transport layer. Handling Precautions Prolonged exposure to light can cause the photoconductor surface of the drum to suffer light fatigue, resulting in a loss of photosensitivity. If the I/C is removed from the copier, it should be wrapped in a soft, clean, opaque cloth or other protective covering to prevent exposure to light.

PC Drum

PC Drum Cross-Section Charge Transport Layer Charge Generation Layer Aluminum Base

1167M007AA

1139M007AA

Gear · Grounding of the PC Drum The PC Drum ground point is located inside and at the front end of the I/C as viewed from the front of the copier and in constant contact with the Drum Holding Shaft. When the I/C is installed in the copier, the Drum Holding Shaft contacts the ground point. This provides for assured grounding of the PC Drum through the ground plate in the rear to the frame of the copier. Ground Point PC Drum

Ground Plate

Shaft

1171M005AA

M-12

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM0900A

9

DRUM CHARGING

· A scorotron charger system generates a negative DC corona discharge onto the PC Drum surface. The grid mesh ensures uniform charging. · The grid voltage (Vg) applied to the grid mesh is controlled by the constant voltage circuitry within the High Voltage Unit. It is varied through image stabilization control. · To restrict ozone production, the copier uses a PC Drum Charge Corona with a comb electrode. PC Drum Charge Corona PC Drum

1171M006AB

1171M008AC

Comb Electrode Grid Mesh Electrical Component Drum charging output Control Signal PJ14A-3A ON L OFF H

M-13

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1000A

10

ERASE LAMP

· Any potential remaining on the surface of the PC Drum is neutralized by both light from the Erase Lamp and a DC negative voltage applied by the Charge Neutralizing Sheet. · The Charge Neutralizing Sheet applies a negative charge on the surface of the PC Drum which is positively charged by the Image Transfer Roller. A voltage of -820V is applied to the Charge Neutralizing Sheet from the High Voltage Unit. The Erase Lamp then illuminates the surface of the PC Drum to further neutralize it. · The Erase Lamp consists of ten tungsten lamps.

Erase Lamp (LA1)

I/C PC Drum

1171M009AD

Cleaning Blade Charge Neutralizing Sheet PC Drum Erase Lamp (LA1)

PC Drum Charge Corona

1171M010AD

Sleeve/Magnet Roller Electrical Component LA1 Control Signal PJ11A-6A All lamps ON H Standby ON L

M-14

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1100A

11

IR SECTION

· Light reflected from the original passes through three mirrors and a lens to form a reduced image on the CCD Sensor as the Scanner is moved by the Scanner Motor. The CCD sensor converts the light pattern (image data) into an electrical image signal. · The electrical image signal is then output to the MFB Board. 7 8 9 10 11

5 4 3 2 1

6

12

13 20 15 19 18 1. BCR Board (BCR) 2. Original Size Detecting Sensor 5 (UN8) 3. Original Cover Detecting Sensor (PC14) 4. Original Size Detecting Sensor 4 (UN7) 5. Exposure Lamp (LA2) 6. Original Size Detecting Sensor 6 (UN9) 7. Scanner Motor (M5) 8. HGB Board (HGB) 9. Original Size Detecting Sensor 1 (UN4) 10. Original Size Detecting Sensor 2 (UN5) 11. Original Size Detecting Sensor 3 (UN6) 17 16
1167M110AD

14

12. Scanner Home Position Sensor 1 (PC12) 13. Size Reset Switch (S5) 14. CCD Board (CCD) 15. Lens 16. Scanner 17. 1st Mirror 18. Scanner Home Position Sensor 2 (PC13) 19. 2nd/3rd Mirrors Carriage 20. Inverter Board (INV)

M-15

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1101A

11-1. Exposure Section: Construction and Function

1. Auxiliary Reflector 2. Exposure Lamp

3. 1st Mirror

1167M089AA

1. Auxiliary Reflector When a book or other bound original is copied, the paper in the area near the binding generally fails to come flush against the glass, so that the copy of these areas is generally too dark. The Auxiliary Reflector reduces this problem by reflecting light from the Exposure Lamp onto these areas of the original. 2. Exposure Lamp A fluorescent lamp is used to illuminate the original. 3. 1st Mirror Directs the reflected light from the original to the 2nd Mirror. Electrical Component LA2 Control Signal CN13BCR-1 ON L OFF H

M-16

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1102A

11-2. Image Processing Flow
· Image processing is made up of the following blocks.
1. Photoelectric Conversion (CCD Sensor)

2. HGB Board Transmitted over an optical cable. 3. MFB Board

4. PH (Laser Emission)

1. Photoelectric Conversion (CCD Sensor) · Light reflected off the original is received through mirrors and lens by the CCD Sensor which, in turn, outputs the corresponding data to the HGB Board. 2. HGB Board · After converting the data received from the CCD to an analog signal, the board converts it to 8-bit image data (A/D conversion). It further makes various corrections and outputs the resultant image data to the MFB Board over an optical cable. 3. MFB Board · This board compresses the image data received from the HGB Board, stores it, and uncompresses it. · The image memory has a standard capacity of 16MB and can be expanded up to 64MB (optional). 4. PH · Emits a laser beam according to the image data provided by the MFB Board to expose the surface of the PC Drum.

M-17

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1103A

11-3. Original Size Detection
· When the copier is in Auto Paper or Auto Size, the sensors mounted in the IR receive light reflected off the original to allow the copier to determine the original size. Original Size Detecting Sensor 6 (UN9) Original Size Detecting Sensor 4 (UN7) Original Size Detecting Sensor 1 (UN4) Original Size Detecting Sensor 2 (UN5) Original Size Detecting Sensor 3 (UN6)

Original Size Detecting Sensor 5 (UN8)

1171M025AD

Electrical Component UN4 UN5 UN6 UN7 UN8 UN9

Control Signal CN4BCR-4 CN5BCR-7 CN11HGB-4 CN6BCR-4 CN9HGB-1 CN8BCR-4

Blocked L L L L L L

Unblocked H H H H H H

M-18

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

Original Size 11" × 17" A3L A4L A4C A5L B4L FLS Letter L Letter C Legal r r r r r r r r r r r r r r r r r r r r r UN4 S1 r r r r S2 r r r r r r r UN5 S3 r r S4 r r r UN6 S5 UN7 S6 r r r S7 r r UN8 S8 r r UN9 S9 r r r r r r r r r r

r: Detected by sensor; L: Lengthwise; C: Crosswise

NOTE UN4, UN6 and UN8 are options.

Original Size 11" × 17" A3L A4L A4C B4L 5-1/2" × 8-1/2"L FLS B5C Letter L Letter C Legal r r r r r r r r r r r r r UN5 S2 r r r r r r r r r r r r S3 r r S4 r r r UN6 S5 UN7 S6 r r r S7 r r UN8 S8 r r UN9 S9 r r r r r r r r r r r

r: Detected by sensor; L: Lengthwise; C: Crosswise

NOTE UN6, UN8 and UN9 are options.

M-19

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1104A

11-4. Original Size Detection Timing
The copier CPU affirms and resets the readings of the original size at the following timings. · Takes size readings: When the Original Cover Detecting Sensor is deactivated. · Affirms size readings: When the Start key is pressed with the Original Cover Detecting Sensor activated or the Size Reset Switch deactuated. · Resets size readings: When the Size Reset Switch is deactuated. Magnet

Original Cover Detecting Sensor (PC14)

Size Reset Switch (S5)
1167M113AB

Electrical Component S5 Electrical Component PC14

Control Signal CN9BCR-2 Control Signal CN10BCR-2

ON L Unblocked L

OFF H Blocked H

M-20

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1105A

11-5. Scanner and 2nd/3rd Mirrors Carriage Moving Mechanism
· During a scan, the Scanner projects an even amount of light from the Exposure Lamp onto the entire surface of the original. The light is reflected from the original to the 1st Mirror of the scanner and then to the 2nd and 3rd Mirrors. · The Scanner is driven by the Scanner Motor and front and rear Scanner Drive Cables. · Scanner speed is determined by the set zoom ratio in reference to the full size mode. · The Scanner is at home position when Scanner Home Position Sensor 1 is blocked. This position serves as the reference for the scan motion. · Scanner Home Position Sensor 2 determines the home position of the Scanner when AF-7 is used. <2nd/3rd Mirrors Carriage> · The 2nd and 3rd Mirrors are mounted to their holder at right angles to each other. They direct the light reflected off the 1st Mirror through the lens to the CCD. · The 2nd/3rd Mirrors Carriage is also moved by the Scanner Drive Cables and pulleys driven by the Scanner Motor. It travels at a speed half that of the Scanner, thereby keeping constant the optical path length between the Original Glass and lens. Scanner Motor (M5)

Scanner Home Position Sensor 1 (PC12)

Scanner 2nd/3rd Mirrors Carriage Scanner Home Position Sensor 2 (PC13) Forward Rotation
1167M112AA

Electrical Component M5 Electrical Component PC12 PC13

Control Signal CN3BCR-1~3 Control Signal CN11BCR-1 CN12BCR-1

Backward Rotation

Pulse output Blocked L L Unblocked H H

M-21

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1200A

12

PH SECTION

· Based on the image data output from the MFB Board, the LD (laser diode) is activated and the corresponding light strikes the surface of the PC Drum.

Polygon Motor Drive Board (UN3) PH Unit
1171M035AA

M-22

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1201A

12-1. PH Components
4 3 2 5 6

1

7 1. 2. 3. 4. Polygon Motor (M10) Cylindrical Lens SOS Mirror Collimator Lens

1167M023AC

5. Laser Diode Board (PWB-B) 6. SOS Sensor 7. f- Lens

Electrical Component M10

Control Signal PJ8A-3

ON L

OFF H

M-23

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1202A

12-2. Laser Emission Timing (SOS Signal)
· The signal output from the Master Board triggers the firing of the laser. The laser beam travels to the Polygon Mirror, lens, and SOS Mirror to eventually hit the SOS Sensor, which generates an SOS signal. · The SOS signal determines the laser emission timing for each line in the main scanning direction. Cylindrical Lens Polygon Motor (M10) Collimator Lens Laser Diode Board SOS Mirror (PWB-B) SOS Sensor

Polygon Mirror

f- Lens PC Drum
1167M024AD

PC Drum

SOS Mirror

SOS Sensor

SOS Signal D C B A
1171M038AA

A to B: LD activation B to C: LD OFF C to D: Laser beam exposure area according to the image data

M-24

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1300A

13

DEVELOPING UNIT

· The Toner Conveying Rollers mix the toner and carrier particles together and carry the toner/carrier mixture up to the Sleeve/Magnet Roller. The magnetic brush formed on the surface of the roller allows the toner to come into contact with the charges on the surface of the PC Drum, thus forming an electrostatic latent image. 1 2 3 4 5 6

14

7

8

9

1171M011AB

13 1. 2. 3. 4. 5. 6. 7.

12

11

10 8. PC Drum 9. Sleeve/Magnet Roller 10. 1st Toner Conveying Roller 11. ATDC Sensor (E1) 12. 2nd Toner Conveying Roller 13. 3rd Toner Conveying Roller 14. Spent Toner Recycling Duct

Spent Toner Recycling Coil PC Drum Charge Corona Spent Toner Feed Roller 2 Cleaning Blade Spent Toner Feed Roller 1 PC Drum Paper Separator Finger PC Drum Protective Shutter

M-25

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1301A

13-1. Sleeve/Magnet Roller
· This copier employs the MT-HG system with a Sleeve/Magnet Roller having the following magnetic characteristics. · Turning of the sleeve surrounding the Magnet Roller ensures that fresh developer from the Developer Mixing Chamber is always being conveyed to the point of development with respect to the PC Drum. N1 : The point of development with the maximum magnetic flux density which ensures that the carrier is firmly held onto the Sleeve Roller when toner is attracted to the latent image. : The magnetic flux density between these two poles is made low to ensure that the developer remaining on the surface of the Sleeve Roller is smoothly recycled. They also prevent developer from scattering. : The developer brush is formed by this pole and its height is moderated before the brush is regulated by the Doctor Blade. : This pole ensures that the developer is conveyed to the point of development over the wide interval between N3 and N1. : If developer is compacted and clogs at the Doctor Blade and, as a result, part of the surface of the Sleeve/Magnet Roller is not covered with developer, the nearby developer around this pole with a weak magnetic force goes to those uncovered areas. This helps prevent white lines from occurring on the copy. N1 PC Drum

S1, N2

N3 S2a S2b

S2b S2a

S1

Sleeve/ Magnet Roller N3 N2
1171M027AA

1st Toner Conveying Roller
1167M076AB

M-26

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1302A

13-2. Developing Bias
· The amount of toner attracted onto the surface of the PC Drum is controlled by varying the developing bias voltage. · As the PC Drum deteriorates and its photoconductive layer begins to wear, it becomes more sensitive to the increase in the amount of toner. As a countermeasure against this problem, the developing bias voltage is automatically switched according to the PC Drum temperature, thereby stabilizing the image quality level.

PC Drum

Sleeve/Magnet Roller

1171M012AB

Developing Bias Contact Terminal Electrical Component Vb Control Signal PJ14A-1A ON L OFF H

M-27

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1303A

13-3. ATDC Sensor
· The ATDC Sensor automatic adjustment is made when a new I/C is installed in the copier. Toner replenishing control is thereafter controlled as detailed in the following. 1. ATDC Sensor Automatic Adjustment · The ATDC Sensor is automatically adjusted when a new I/C is loaded in the copier. During this sequence, the copier reads the sensor output value and sets it as the reference. This reference value is stored in memory and used until the I/C reaches its service life. 2. Toner Replenishing Control · While the I/C Motor is turning, the ATDC Sensor samples T/C and, according to the readings, the copier provides the following controls. T/C Ratio (%) More than 19 14 to 19 13 to 14 12 to 13 10 to 12 7 to 10 Less than 7 Sampling Data (V) Less than 1.41 2.32 to 1.41 2.50 to 2.32 2.68 to 2.50 3.10 to 2.68 3.92 to 3.10 More than 3.92 Control Details Defective ATDC Sensor Toner replenished for 0 msec. Toner replenished for 54 msec. at intervals of approx. 1 sec. Toner replenished for 150 msec. at intervals of approx. 1 sec. Toner replenished for 378 msec. at intervals of approx. 500 msec. Passed onto the T/C recovery mode. Defective ATDC Sensor

V Toner replenishment represents the operation of the Sub Hopper Toner Replenishing Motor. 3. Toner Empty Control (T/C Recovery Mode) · When the control is passed onto the T/C recovery mode, the Sub Hopper Toner Replenishing Motor is energized to replenish the supply of toner into the Developing Unit and, if T/C is recovered to a level of 14% or higher (2.32V or less) within 150 sec., it resets the toner-empty condition.

M-28

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1304A

13-4. Sub Hopper Toner Replenishing Mechanism
· Toner is replenished from the Sub Hopper to the Developing Unit by turning the Sub Hopper Toner Replenishing Motor for the period of time controlled by the ATDC output voltage (T/C).

Sub Hopper
1171M013AC

Sub Hopper Toner Replenishing Motor (M7) Electrical Component M7 Control Signal PJ11A-8A ON DC24V OFF L

M-29

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1305A

13-5. Sub Hopper Toner Empty Detecting Mechanism
· A toner-empty condition in the Sub Hopper is detected by the Magnet Lever that moves up and down as the Sub Hopper Toner Agitating Lever turns and actuates and deactuates the Sub Hopper Toner Empty Switch. · While the amount of toner in the Sub Hopper is more than the predetermined amount, the Magnet Lever rests on the toner, keeping the Sub Hopper Toner Empty Switch deactuated even when the Sub Hopper Toner Agitating Lever turns. As toner is consumed, the Magnet Lever lowers to eventually actuate the Sub Hopper Toner Empty Switch, at which timing the copier detects a toner-empty condition in the Sub Hopper.

Magnet Lever

Magnet

Sub Hopper Toner Agitating Lever
1171M021AA

Sub Hopper Toner Empty Switch (S4)

Electrical Component S4

Control Signal PJ11A-7B

ON L

OFF H

M-30

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1306A

13-6. Main Hopper Toner Replenishing Mechanism
· When a toner-empty condition in the Sub Hopper is detected, the Main Hopper Toner Replenishing Motor is energized to turn the Toner Bottle, thereby supplying toner from the Main Hopper to the Sub Hopper. · The Toner Bottle Home Position Sensor mounted on the coupling ensures that the Toner Supply Port in the Toner Bottle is positioned at the top whenever the bottle is stopped. · The Toner Bottle Cover Sensor detects whether the Toner Bottle Cover is open. If the cover is open, the copier does not authorize the initiation of a new copy cycle. If the cover is opened during a copy cycle, the copier interrupts the cycle. Toner Bottle

Main Hopper Toner Replenishing Motor (M6)

Sub Hopper Toner Bottle Home Position Sensor (PC10)

1171M020AB

Electrical Component M6 Electrical Component PC10

Control Signal PJ11A-4A Control Signal PJ11A-2B

ON DC24V Unblocked L

OFF L Blocked H

M-31

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1307A

13-7. I/C Cooling Fan Motor
· The I/C Cooling Fan Motor prevents the temperature inside the copier (around the entire I/C) from rising inordinately.

I/C

I/C Cooling Fan Motor (M9) Electrical Component M9
1171SBM1308A

1171M032AB

Control Signal PJ18A-10

ON DC24V

OFF L

13-8. Ozone Fan Motor
· Ozone produced by the PC Drum Charge Corona is absorbed by the Ozone Filter from the air being drawn out of the copier by the Ozone Fan Motor. Ozone Fan Motor (M8)

I/C

Ozone Filter

1171M023AC

Electrical Component M8

Control Signal PJ11A-1A

ON DC24V

OFF L

M-32

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1400A

14

PAPER TAKE-UP/FEED SECTION

NOTE · For the details of the 2nd Cassette (500-Sheet Cassette), see the relevant option service manual.
· This copier employs the Multi-Purpose (MP) Cassette whose capacity is about 250 sheets (about 20 sheets for special paper). Paper Size Detecting Board (PWB-I)

Paper Take-Up Roll

Trailing Edge Stop
1171SBM1401A

1167M055AA

14-1. MP Cassette Paper Lifting Plate
· The Paper Lifting Plate installed in the MP Cassette is spring-loaded to push the paper stack upward. When the cassette is slid into the copier, the lever located on the bottom of the cassette and used to lock down the Paper Lifting Plate is pushed and unlocked, allowing the Paper Lifting Plate to push the paper stack upward.

Lever Paper Lifting Plate
1167M080AA

M-33

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1402A

14-2. MP Cassette-in-Position Detection
· When the MP Cassette is slid into the copier, the light blocking plate located in the rear of the cassette blocks the Cassette Set Sensor and the copier determines that the MP Cassette has been slid into position.

Cassette Set Sensor (PC6) Light Blocking Plate

1167M052AB

Electrical Component PC6

Control Signal PJ13A-5B

Unblocked H

Blocked L

M-34

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1403A

14-3. MP Cassette Paper Empty Detection
· Two sensors are used in this copier: the Paper Empty Sensor detects a paper-empty condition, while the Paper Near-Empty Sensor detects a paper near-empty condition. Paper Near-Empty Detection: · A paper near-empty condition is detected as the paper is consumed and when the NearEmpty Lever lowers to eventually block the sensor (L). · At this time, the MP Cassette Paper Empty LED starts blinking. · A paper-empty condition results when about 50 more sheets of paper are used after the near-empty condition has been detected. Near-Empty Lever

Paper Lifting Lever Paper Near-Empty Sensor (PC4)
1167M071AC

Paper Empty Detection: · A paper-empty condition is detected as the paper is consumed and when the Empty Lever lowers to eventually block the sensor (L). · At this time, the MP Cassette Paper Empty LED lights up steadily. Paper Empty Sensor (PC5)

Empty Lever Electrical Component PC4 PC5 Control Signal PJ14A-13A PJ13A-2B

1167M073AD

Unblocked H H

Blocked L L

M-35

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1404A

14-4. MP Cassette Paper Size Detection
· The Paper Size Detecting Board detects the length of the paper (FD). · A lever is connected to the Trailing Edge Stop of the cassette and, as the stop is slid to the size of the paper loaded in the cassette, the lever is moved to turn ON and OFF the size detecting switches mounted on the copier side. · The control panel settings are necessary for any paper size other than the following. Paper Size Detecting Switches (PWB-I) 1 ON OFF OFF ON ON ON OFF ON 2 OFF OFF ON ON ON OFF ON ON 3 OFF OFF ON ON OFF OFF OFF ON 4 OFF OFF ON ON OFF ON OFF OFF Paper Size A3L, 11"×17"L B4L, 8-1/2"×14"L A4L B5L, 8-1/2"×11"L A4C/A5L B5C A5C 8-1/2"×11"C

Paper Size Detecting Board (PWB-I) 1 2 3 4

Trailing Edge Stop Electrical Component PWB-I (1) PWB-I (2) PWB-I (3) PWB-I (4) Control Signal PJ14A-1B PJ14A-2B PJ14A-3B PJ14A-4B ON L L L L

1167M060AC

OFF H H H H

M-36

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1405A

14-5. Paper Take-Up Mechanism
· Drive from the Main Motor is transmitted to the Paper Take-Up Clutch (spring clutch) and, by energizing the Paper Take-Up Solenoid, the Paper Take-Up Roll is turned. · The paper separating mechanism employs a Paper Separator Pad. Main Motor (M2)

Paper Take-Up Clutch

Paper Take-Up Roll Paper Separator Pad

Paper Take-Up Solenoid (SL1)
1167M038AB 1171SBM1406A

1167M054AB

14-6. Manual Bypass Tray
1. Construction of the Manual Bypass Tray · Drive from the Main Motor is transmitted to the Manual Paper Feed Take-Up Clutch and, by energizing this clutch, the Manual Feed Paper Take-Up Roll is turned. Main Motor (M2) Manual Paper Feed Take-Up Clutch (CL3) Manual Feed Paper Take-Up Roll

Manual Feed Paper Take-Up Sensor (PC8)

Manual Bypass Tray
1167M067AC

Electrical Component M2 SL1 CL3

Control Signal PJ16A-1 PJ13A-13B PJ4A-9A

ON L L L

OFF H H H

M-37

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

2. Manual Feed Paper Take-Up Detection · The Manual Feed Paper Take-Up Sensor detects a sheet of paper that is fed via the Manual Bypass Tray. · The size and type of the paper for manual feed are set on the control panel. Manual Feed Paper Take-Up Sensor (PC8)

1167M086AA



1167M085AA

Electrical Component PC8
1171SBM1407A

Control Signal PJ4A-7B

Unblocked H

Blocked L

14-7. Paper Take-Up Retry Mechanism
· To minimize the occurrence of a paper misfeed due to a slippery Paper Take-Up Roll, the Paper Take-Up Solenoid is energized a second time if a sheet of paper fails to reach the Synchronizing Roller Sensor within a given period of time after the solenoid has been energized first. · A paper take-up misfeed results if the sheet of paper does not reach the Synchronizing Roller Sensor even after two paper take-up sequences.

M-38

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1500A

15

SYNCHRONIZING ROLLERS

· The Synchronizing Rollers of this copier are located inside the Right Door. They are easily accessible for misfeed clearing by just opening the Right Door.

Synchronizing Roller

1171M029AA

1171SBM1501A

15-1. Synchronizing Roller Drive Mechanism/Control
· The Synchronizing Rollers are turned by the drive from the Main Motor transmitted to the Synchronizing Clutch. · The rollers are started when the Synchronizing Clutch is deenergized. Main Motor (M2) Synchronizing Clutch (CL1)

Left Synchronizing Roller

Right Synchronizing Roller
1167M064AA

Electrical Component M2 CL1

Control Signal PJ16A-1 PJ13A-2A

ON L L

OFF H H

M-39

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1502A

15-2. Paper Dust Remover
· The Paper Dust Remover is installed so that it makes contact with the Left Synchronizing Roller. It is intended for preventing paper dust from sticking to the surface of the PC Drum. · As the roller turns in contact with the Paper Dust Remover, triboelectric charging occurs, which attracts paper dust from the paper that passes between the two rollers and the dust is, in turn, transferred onto the Paper Dust Remover.

Synchronizing Roller

Paper Dust Remover

Synchronizing Roller Sensor (PC2)

1171M026AB

M-40

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1600A

16

IMAGE TRANSFER AND PAPER SEPARATION

Image Transfer · This copier employs an Image Transfer Roller to transfer the image to the paper. The High Voltage Unit applies an image transfer current to this roller. To ensure that image transfer efficiency is stabilized, the image transfer current is automatically varied according to the paper size, paper type, and the B/W ratio of the original. · To prevent toner from sticking to the Image Transfer Roller, an image transfer voltage of -975V is applied to the roller for cleaning. Paper Separation · To neutralize any charge left on the paper, to which the image has been transferred, the High Voltage Unit applies a voltage of -1200V via a ground plate to the Charge Neutralizing Plate.

PC Drum

Ground Plate Charge Neutralizing Plate

Image Transfer Roller
1167M082AA

Electrical Component Image transfer output

Control Signal PJ14A-2A

ON L

OFF H

M-41

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1700A

17

PC DRUM PAPER SEPARATOR FINGERS

· The three PC Drum Paper Separator Fingers fitted to the I/C mechanically separate paper from the surface of the PC Drum to ensure good and positive paper separation. PC Drum Paper Separator Fingers

PC Drum

1171M014AA

PC Drum Protective Shutter Paper Path Center

8.5cm

8.5cm

1167M053AC

M-42

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1800A

18

PC DRUM CLEANING

· This copier employs a spent toner recycling mechanism. The Cleaning Blade which is held pressed against the surface of the PC Drum scrapes residual toner off the surface. The waste toner is conveyed by Spent Toner Feed Roller 1 and 2 to the Spent Toner Recycling Duct and eventually back to the Developer Mixing Chamber.

Cleaning Blade PC Drum
1171M015AA

Spent Toner Feed Roller 1 Spent Toner Feed Roller 2

Toner Conveying Rollers

1171M016AA

Spent Toner Recycling Coil

Recycling Duct

M-43

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1900A

19

FUSING UNIT

· The paper, to which the developed image is yet to be fixed, is fed through heated Left and Right Fusing Rollers. The heat and pressure applied at this time fixes the image permanently to the paper. 1 2

3

9 4 8

7

6

5
1167M078AB

1. 2. 3. 4. 5.

Paper Exit Roller Fusing Misfeed Clearing Lever Paper Exit Sensor (PC3) Pressure Spring Right Fusing Roller

6. 7. 8. 9.

Fusing Roller Heater Lamp (H1) Left Fusing Roller Fusing Roller Thermostat (TS1) Fusing Paper Separator Finger

M-44

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1901A

19-1. Drive Mechanism
· Drive from the Main Motor is transmitted via a gear train to the Right Fusing Roller.

Right Fusing Roller

Paper Exit Roller

Main Motor (M2)

1167M057AB

Electrical Component M2
1171SBM1902A

Control Signal PJ16A-1

ON L

OFF H

19-2. Fusing Rollers Pressure Mechanism
· To ensure that there is a certain width of area of contact between the Left and Right Fusing Rollers, pressure springs are installed. · The rollers are held pressed against each other at all times and they are released only when servicing the copier or replacing parts. · The pressure between the two rollers is approx. 17 kg. · The rollers can be released by moving the Fusing Misfeed Clearing Lever in the direction of the arrow. Fusing Misfeed Clearing Lever Pressure Spring

1167M077AF

M-45

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

1171SBM1903A

19-3. Fusing Temperature Control
· The Fusing Roller Heater Lamp inside the Left Fusing Roller provides the following temperature control. - Temperature Control During Standby State -

200 185

Approx. 5 min.

Approx. 1 min.

Warm-Up Completed (200°C)

Mode 1

Mode 2 Mode 3
1171M031AB

- Temperature Control During a Copy Cycle -

210 200 190 180 175 Approx. 5 min. Approx. 1 min. Special paper Plain paper (1-sided) Plain paper (2-sided) Transparencies

Mode 1

Mode 2 Mode 3
1171M030AB

· The Fusing Roller Thermistor detects the surface temperature of the Left Fusing Roller. It provides an analog voltage input to the Master Board allowing the copier to control the fusing temperature. Electrical Component H1 Electrical Component TH1 Control Signal PJ16A-8 Control Signal PJ16A-5 ON L OFF H

Low Temp. High Temp. Analog input

M-46

FrameMaker Ver.5.5E(PC) Di350 GENERAL, MECHANICAL/ELECTRICAL 98.12.18

· The mode that is initiated following the completion of a warm-up cycle varies as detailed below depending on the machine c