Service Manual

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Di850

Service Manual

[General]

Service Manual [General]

Di850

7661-4027-11 02080000

2002 MINOLTA CO., LTD.

MINOLTA Co.,Ltd.

Use of this manual should be strictly supervised to

avoid disclosure of confidential information.

Summary of content (138 pages)

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Service Manual [General] Di850 Copyright 2002 MINOLTA CO., LTD. Use of this manual should be strictly supervised to avoid disclosure of confidential information. MINOLTA Co.,Ltd.
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Di850g.
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２００２年７月１２日金曜日午前８時３６分 CONTENTS CONTENTS SAFETY AND IMPORTANT WARNING ITEMS . . . . S-1 IMPORTANT NOTICE . . . . . . . . . . . . . . . . . S-1 DANGER, WARNING, AND CAUTION SYMBOLS AND EXPRESSIONS . .S-1 SAFETY WARNINGS . . . . . . . . . . . . . . . . . . S-2 SAFETY INFORMATION . . . . . . . . . . . . . . . . . S-9 IMPORTANT INFORMATION SAFETY CIRCUITS . . . . . . . . . . . S-9 . . . . . . . . . . . . . . . . . . .S-10 INDICATION OF WARNING ON THE MACHINE . . .S-12 1.
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2 UNIT 3 DIS./ASSEMBLY EXPLANATION 3 DIS./ASSEMBLY 1 OUTLINE Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 CONTENTS [7] PCL/TSL Control .................................... 2-F-6 DEVELOPING UNIT ............................................. 2-G-1 [1] Composition........................................... 2-G-1 [2] Mechanisms .......................................... 2-G-1 [3] M3 (Developing Unit Drive) Control....... 2-G-2 [4] Developing Bias Control ........................
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS SAFETY AND IMPORTANT WARNING ITEMS Read carefully the Safety and Important Warning Items described below to understand them before doing service work. IMPORTANT NOTICE Because of possible hazards to an inexperienced person servicing this copier as well as the risk of damage to the copier, Minolta Corporation strongly recommends that all servicing be performed only by Minolta-trained service technicians.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS SAFETY WARNINGS [1] MODIFICATIONS NOT AUTHORIZED BY MINOLTA Minolta copiers are renowned for their high reliability. This reliability is achieved through high-quality design and a solid service network. Copier design is a highly complicated and delicate process where numerous mechanical, physical, and electrical aspects have to be taken into consideration, with the aim of arriving at proper tolerances and safety factors.
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS [2] CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE Minolta copiers are extensively tested before shipping, to ensure that all applicable safety standards are met, in order to protect the customer and customer engineer (hereafter called the CE) from the risk of injury. However, in daily use, any electrical equipment may be subject to parts wear and eventual failure.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS WARNING: Power Plug and Cord • Do not bundle or tie the power cord. Overheating may occur there, leading to a risk of fire. • Check whether dust is collected around the power plug and wall outlet. Using the power plug and wall outlet without removing dust may result in fire. • Do not insert the power plug into the wall outlet with a wet hand. The risk of electric shock exists.
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Safety.fm Page 5 Friday, October 4, 2002 2:28 PM SAFETY AND IMPORTANT WARNING ITEMS WARNING: Ground Lead • Pay attention to the point to which the ground lead is connected. Connecting the ground lead to an improper point such as the points listed below results in a risk of explosion and electric shock: a. Gas pipe (A risk of explosion or fire exists.) b. Lightning rod (A risk of electric shock or fire exists.) c. Telephone line ground (A risk of electric shock or fire exists in the case of lightning.) d.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS CAUTION: Ventilation • The copier generates ozone gas during operation, but it is not sufficient to be harmful to the human body. If a bad smell of ozone is present in the following cases, ventilate the room. a. When the copier is used in a poorly ventilated room b. When taking a lot of copies c.
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Di850g.book 7 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS DANGER: Work Performed with the Copier Powered • Take every care when servicing with the external cover detached. High-voltage exists around the drum unit. A risk of electric shock exists. WARNING: Safety Checkpoints • Check the exterior and frame for edges, burrs, and other damages. Personal injuries may result. • Do not allow any metal parts such as clips, staples, and screws to fall into the copier.
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Di850g.book 8 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY AND IMPORTANT WARNING ITEMS WARNING: Safety Checkpoints • After replacing a part to which AC voltage is applied (e.g., optical lamp and fixing lamp), be sure to check the installation state. A risk of fire exists. • Check the interlock switch and actuator for loosening and check whether the interlock functions properly. If the interlock does not function, you may receive an electric shock or be injured when you insert your hand in the copier (e.g.
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Di850g.book 9 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION DANGER: HANDLING OF MATERIALS FOR SERVICING • Toner and developer are not harmful substances, but care must be taken not to breathe excessive amounts or let the substances come into contact with eyes, etc. It may be stimulative. If the substances get in the eye, rinse with plenty of water immediately. When symptoms are noticeable, consult a physician. • Never throw the used cartridge and toner into fire.
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Di850g.book 10 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION SAFETY CIRCUITS [2] This machine is provided with the following safety circuits to prevent machine faults from resulting in seri- Protection by L2 and L4 (fixing heater lamps) overheating prevention circuit ous accidents.
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Di850g.book 11 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION 2. Protection by the hardware circuit The output voltages from TH1 and TH2 (fixing temperature sensor 2), TH3 (fixing temperature sensor 3), and TH4 (fixing temperature sensor 4) are compared with the abnormality judgement reference value in the comparator circuit. If the output voltage from TH1, TH2, TH3, or TH4 exceeds the reference value, L2, L4, and RL1 are turned off in hardware means.
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Di850g.book 12 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION INDICATION OF WARNING ON THE MACHINE Caution labels shown below are attached in some areas on/in the machine areas. When accessing these areas for maintenance, repair, or adjustment, special care should be taken to avoid burns and shock hazards.
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Di850g.book 13 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION PS WARNING Unplug the machine before removing platen glass. DANGER Debrancher le copieur avant de retirer la vitre d'exposition. WARNUNG Vor Entfernen des Vorlagenglases Netzstecker ziehen. ADVERTENCIA Desenchufe la maquina antes de quitar el vidrio. AVVERTIMENTO Estrarre la spina dalla presa prima di rimuovere il vetro di esposizione. PS Elektrische Teile In dieser Einheit DANGER VISIBLE LASER RADIATION WHEN OPEN.
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Di850g.book 14 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION Tray 1 Tray 2 CAUTION CAUTION DO NOT put your hand between the main body and tray; otherwise you may be injured. Tray 3 FN-7 Only CAUTION ATTENTION PRECAUCION CUIDADO CAUTION ATTENTION VORSICHT PRECAUCION ATTENZIONE CAUTION Use care after opening the paper exit outlet. DO NOT put your hands into the paper exit outlet as you may be injured. CAUTION Inside the lower paper exit outlet is the roller drive unit.
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Di850g.book 15 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION CAUTION WARNING WARNING Unplug the machine before removing panels. D brancher lÕappareil avant de retirer les panneaux arri res. Desenchufe la m‡quina antes de quitar los paneles. Desconecte a unidade da tomada antes de remover os pain is. Unplug the machine before removing panels. D brancher lÕappareil avant de retirer les panneaux arri res. Vor Abnahme der Schutzverkleidung Netzstecker ziehen.
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Di850g.book 16 ページ２００２年７月１２日金曜日午前８時３６分 SAFETY INFORMATION WARNING Unplug the machine before removing panels. Débrancher l’appareil avant de retirer les panneaux arrières. Desenchufe la máquina antes de quitar los paneles. Desconecte a unidade da tomada antes de remover os painéis. Unplug the machine before removing panels. Débrancher l’appareil avant de retirer les panneaux arrières. Vor Abnahme der Schutzverkleidung Netzstecker ziehen. Desenchufe la máquina antes de quitar los paneles.
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1 ページ２００２年７月１２日金曜日午前８時３６分 1 OUTLINE Di850g.
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1 OUTLINE Di850g.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 1 OUTLINE OUTLINE PRODUCT SPECIFICATIONS [1] Type Zoom magnifications: x0.25 to x4.00 (600 dpi, in 1% steps) Vertical magnifications: x0.25 to x4.00 (600 dpi, in 1% steps) Horizontal magnifications: x0.25 to x4.00 (600 dpi, in 1% steps) Warm-up time: Less than 6 minutes*2 *2: 6 minutes is the machine for the 230VAC specification. Warm-up time differs depending on the Power source (voltage).
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 [3] Applicable Copy Paper 1 OUTLINE OUTLINE [5] Particulars of Machine Plain paper: Power supply: 230 VAC EURO: -14 to 10.6 % USA : ±10 % 50 Hz/ 60 Hz 208 to 240 VAC 60 Hz Power consumption: 230 V Machine: 3450 W max. (Full option) 208 to 240 V Machine: 3840 W max. (Full option) Weight: Approx. 280 kg (617 lbs.
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1 ページ２００２年７月１２日金曜日午前８時３６分 2 UNIT EXPLANATION 2 UNIT EXPLANATION Di850g.
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chapter2_B.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 DRIVE SECTION [3] M1 (Main) Control MS2 [4] M2 (Drum) Control MS2 MS1 2 UNIT EXPLANATION MS1 24VDC PGND 24VDC PGND DCPS2 DCPS2 M1 M2 M2CONT M2 F/R SGND M2 EN M1 CONT M1 EM CLK PRCB PRCB M1 (main) is controlled by the PRCB (printer control board) and the motor drive power is supplied from DCPS2 (DC power supply unit 2).
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 READ SECTION READ SECTION [1] Composition Exposure unit V-mirror unit (2nd and 3rd mirrors) Slit glass CCD unit Scanner cooling fan (FM7) A/D converter board [2] Mechanisms Mechanism Light source Xenon lamp Method Exposure Light source shift slit exposure, static exposure Scanning Platen original scanning: 1st, 2nd, and 3rd mirrors are shifted. RADF original scanning: Original is moved with light source held stationary.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 READ SECTION [3] M13 (Scanner Drive) Control d. 2 UNIT EXPLANATION M13 CLK M13 F/R M13 CSEL M13 V0 M13 V1 M13 V2 M13 DRIVE U M13 DRIVE V M13 DRIVE W M13 5VDC PS5 SGND PS5 PS7 PS7 5VDC PS6 SGND PS6 PS5 PS7 PS6 PS4 24VDC PGND DCPS2 5VDC SGND PRCB SCDB DCPS1 M13 (scanner drive) is driven by the SCDB (scanner drive board) and is controlled by the PRCB (printer control board).
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3 ページ２００２年７月１２日金曜日午前８時３６分 READ SECTION f. b. PRCB output signals (1) M13 CLK (PRCB to SCDB) Clock signal for M13. (2) M13 F/R (PRCB to SCDB) M13 rotational direction switchover signal. [L]: The exposure unit is moved toward the paper exit side. [H]: The exposure unit is moved toward the paper feed side. (3) M13 CSEL (PRCB to SCDB) M13 excitation switchover signal. [L]: 2-/3-phase excitation [H]: W2-/3-phase excitation (4) M13 V0 to V2 (PRCB to SCDB) M13 excitation current switchover signal. c.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 READ SECTION [4] Exposure control 2 UNIT EXPLANATION L1 CONT 24VDC LV L1 CONT HV L1 L1 INVB 24VDC PGND PRCB SCDB DCPS2 L1 (exposure lamp) is driven by the L1 INVB (L1 inverter) and is controlled by the PRCB (printer control board) via the SCDB (scanner drive board). 1. Operation L1 is a xenon lamp driven by the inverter circuit.
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Di850g.book 5 ページ２００２年７月１２日金曜日午前８時３６分 READ SECTION [6] APS Control CCD 5VDC PS62 SGND PS62 PS63 PS63 PS64 PS64 PS65 PS65 PS66 PS66 PS67 PS67 PS68 PS68 ADB 5VDC SGND ICB IFB ICB PRCB Original read control is performed by the ADB (A/D converter board) and CCD sensor installed in the ADB. 1. Operation The light reflected by the exposed original is input to the CCD sensor through the lens.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 (2) Platen mode The paper size is detected according to the combination of ON/OFF states of PS62 (APS 1), PS63 (APS 2), PS64 (APS 3), PS65 (APS 4), PS66 (APS 5), PS67 (APS 6), and PS68 (APS 7). The APS sensor consists of LEDs and photosensors. Lights emitted from the LEDs is reflected by the original and received by photosensors. Paper exit side 2 UNIT EXPLANATION READ SECTION PS63 PS62 2. Signals PS66 a.
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Di850g.book 7 ページ２００２年７月１２日金曜日午前８時３６分 [7] AE Control (2) Non-image area erasure mode Entire original area detected by forward scanning. (3) DF mode The image at the leading edge of the original is read when the START button is pressed. The read data is used to measure the image density on the original. (1) Main scanning direction • 10-mm area inside the original detected by APS (2) Sub scanning direction Range between 2mm to 7.3mm from the leading edge of the original.
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2 UNIT EXPLANATION Di850g.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 WRITE UNIT WRITE UNIT [1] Composition Cylindrical lens 1 2 UNIT EXPLANATION Polygon mirror Index sensor board Cylindrical lens 2 3rd mirror Laser driver board LD2 2nd mirror fθ lens 2 Collimator lens unit 2 fθ lens 1 Beam combining prism Collimator lens unit 1 Laser driver board LD1 [2] Mechanisms *1 *2 *3 *1 Mechanism Scan Method Polygon mirror Rotational speed: 24,803.1 rpm (400 dpi) 37,204.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 2 UNIT EXPLANATION WRITE UNIT *2 Positioning Each laser beam is positioned by the compression prism and fine adjustment prism. *3 Laser beam combining Two laser beams output at right angle to each other are redirected in the same direction using the beam combining prism.
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3 ページ２００２年７月１２日金曜日午前８時３６分 WRITE UNIT b. PRCB output signals (1) M17 CONT (PRCB to PMDB) This signal turns ON/OFF M17. [L]: M17 ON [H]: M17 OFF (2) M17 CLK (PRCB to PMDB) This is a reference clock signal for PLL-controlling M17 in PMDB. c. PMDB input signals (1) M17 MAG A/A’ (M17 to PMDB) (2) M17 MAG B/B’ (M17 to PMDB) (3) M17 MAG C/C’ (M17 to PMDB) Output signals from the position sensor (magnetic sensor) incorporated in M17.
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5 ページ２００２年７月１２日金曜日午前８時３６分 WRITE UNIT 1. Operation a. Image processing The following processing is performed by the ICB (image control board): (1) AOC (Auto Offset Control) During shading correction, a read operation takes place while L1 (exposure lamp) is OFF, and the analog offset voltage of the output from the CCD sensor is automatically adjusted so that the resulting level is the lower limit of the A/D converter.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 WRITE UNIT 2 UNIT EXPLANATION 2. Signals a. ICB IFB input signals (1) M INDEX 1, 2 (INDEXSB to ICB IFB) This is an index signal used to detect deviation of vertical scanning. (2) S INDEX 1, 2 (INDEXSB to ICB IFB) This is an index signal used to detect deviation of horizontal scanning. (3) IPR (INDEXSB to ICB IFB) This signal monitors the INDEXSB power supply.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 DRUM UNIT DRUM UNIT [1] Composition Developing unit Separation claws Cleaning/toner recycle unit Separation claw solenoid (SD4) Charging corona unit PCL Developing unit Cleaning/toner recycle unit Transfer and separation corona unit TSL [2] Mechanisms Mechanism nism slides the separation claws about 5 mm back and forth in parallel with the drum surface.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 DRUM UNIT [3] Separation Claw Control [4] Paper Guide Plate Control GP CONT 2 UNIT EXPLANATION 24VDC SD4 DRIVE GP SD4 M2CONT M2EM PRCB ADUSDB PRCB M2 MS2 MS1 24VDC PGND 24VDC PGND DCPS2 DCPS2 HV2 The separation claw is driven by SD4 (separation claw). The vibration of the separation claw is put in by M2 (drum). SD4 is controlled directly by PRCB (printer control board). 1. Operation a.
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 DRUM UNIT [5] Drum Potential Control a. PRCB Input signals (1) DPS ANG (DPSB to PRCB) Analog signal corresponding to the drum charging potential. b. DPSB Input signals (1) DPS ANG 1 and 2 (DPS to DPSB) Analog signal corresponding to the drum charging potential. c. DPSB output signals (1) DPS DRIVE A and B (DPSB to DPS) DPS (drum potential) drive signal.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 CORONA UNIT SECTION CORONA UNIT SECTION [1] Composition Transfer entrance guide plate Charging corona wires Guide rollers Transfer corona unit PCL Plunging prevention plate Charging wire cleaning motor (M23) Charging wire cleaning material Separation corona unit [2] Mechanisms Mechanism Charging wire cleaning material Method *1 Charging Scorotron (DC negative corona discharge). Discharge wire: Tungsten, 0.06 mm dia.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 CORONA UNIT SECTION [3] Charging Control 2. Signals C CONT1 C CONT2 C SHIFT SGND 2 UNIT EXPLANATION C SIG CHARGING G SHIFT PRCB 24VDC PGND DCPS2 MS2 MS1 HV1 Charging control is conducted by serial data transmitted from PRCB (printer control board) to HV1 (high voltage unit 1). The applied voltage for the charging wires are supplied by HV1. 1. Operation a. b. Charging A Scorotron charging method is used.
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 [4] Transfer/Separation Control b. PRCB output signals (1) T SHIFT (PRCB to HV2) Transfer corona unit output level control signal. This signal controls the level of the output to the transfer corona unit according to the duty ratio of the pulse (PWM) signal sent from the PRCB. 24VDC PGND DCPS2 SEPARATION MS2 MS1 24VDC T CONT S CONT SEL T SHIFT duty T SIG S SIG SGND PGND (2) S SHIFT (DC) (PRCB to HV2) Separation corona unit output level control signal.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 2 UNIT EXPLANATION CORONA UNIT SECTION d. ADUSDB output signals (1) T CONT (ADUSDB to HV2) Transfer corona unit output ON/OFF control signal. [L]: Transfer corona unit ON [H]: Transfer corona unit OFF (2) S CONT (ADUSDB to HV2) Separation corona unit output ON/OFF control signal. [L]: Separation corona unit ON [H]: Separation corona unit OFF (3) SEL (ADUSDB to HV2) Feedback switchover signal.
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5 ページ２００２年７月１２日金曜日午前８時３６分 CORONA UNIT SECTION 2. Signals a. Input signals (1) PS41 (PS41 to PRCB) Charging wire cleaning pad home position detection signal. This signal detects the reference position of the charging wire cleaning pad home position. [L]: HP detected [H]: HP not detected (2) PS42 (PS42 to PRCB) Charging wire cleaning pad limit detection signal. This signal detects the limit position of charging wire cleaning pad. [L]: Limit position detected [H]: Limit position not detected b.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 CORONA UNIT SECTION 2 UNIT EXPLANATION c. Cleaning operation The home position of the transfer and separation wire cleaning pads is on the front side of machine.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT DEVELOPING UNIT Developing unit cover Developing regulation plate Developing sleeve Developing sleeve Splash prevention sheet (upper) Agitator wheel Agitator screws [2] Mechanisms Mechanism Developing Method 2-component developer Developing bias DC bias Developer agitation Main agitator Auxiliary agitator Drum Developing regulation plate 1.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT [3] M3 (Developing Unit Drive) Control MS2 [4] Developing Bias Control MS1 2 UNIT EXPLANATION 24VDC PGND 24VDC 5VDC SGND B CONT B SHIFT B FB DCPS2 BIAS M3 M3 CONT M3 CLK M3 EM PRCB 5VDC SGND PRCB DCPS1 M3 (developing) is controlled by the PRCB (printer control board) and the motor drive power is supplied by DCPS2 (DC power supply unit 2).
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT [5] Toner Density Control a. Output signals (1) M11 DRIVE A, A (PRCB to M11) M11 A-phase drive signal. (2) M11 DRIVE B, B (PRCB to M11) M11 B-phase drive signal. 24VDC 24VDC M11 DRIVE A M11 DRIVE A M11 M11 DRIVE B M11 DRIVE B PRCB MS2 MS1 24VDC PGND DCPS2 The toner density is controlled directly by PRCB (printer control board) by controlling M11 (toner supply 1).
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT [6] Dmax Control MS2 MS1 2 UNIT EXPLANATION 24VDC 24VDC PGND M2 M2 CONT M2 F/R SGND M2 EM DCPS2 12VDC 5VDC SGND M3 CONT M3 CLK M3 EM DCPS1 TH5 TH5 ANG1 DPS ANG AGND M3 DPS DRIVE A DPS DRIVE B DPS ANG 1 DPS ANG 2 DPS DPSB TH5 ANG2 5VDC Dmax LED CONT /Dmax LED Vref JAM LED CONT Dmax SIG Dmax MONI JAM SIG PRCB Dmax control is performed by the TCSB (toner control sensor board), M2 (drum), M3 (developing), and so on.
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5 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT 2. Signals a. PRCB input signals (1) Dmax SIG (TCSB to PRCB) Output voltage of the Dmax value detection sensor (PD1) on the TCSB. Reference voltage: 2.5V (2) Dmax MONI (TCSB to PRCB) This signal monitors the light reflected by the drum surface (without toner). The voltage applied to the Dmax detection LED is corrected by γ/Dmax LED Vref so that the output voltage becomes 4V (calibration). Reference voltage: 4V a) Before D max correction.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT [7] Gradation Correction Control 2 UNIT EXPLANATION 24VDC 24VDC PGND DCPS2 12VDC 5VDC SGND DCPS1 MS2 MS1 M2 M2 CONT M2 F/R SGND M2 EM M3 CONT M3 CLK M3 EM DPS ANG AGND M3 DPS DRIVE A DPS DRIVE B DPS ANG 1 DPS ANG 2 DPS DPSB 5VDC /Dmax LED Vref LED CONT SIG/MONI PRCB TCSB Gradation correction control is performed by the TCSB (toner control sensor board), M2 (drum), M3 (developing), and so on.
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7 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT b. PRCB Output signals (1) γ LED CONT, γ CONT (PRCB to TCSB) ON/OFF control signal for gradation detection LED. [L]: LED ON [H]: LED OFF (2) γ Dmax LED Vref, Vref (PRCB to TCSB) Power supply line to the γ LED on the TCSB. The voltage applied to the γ LED is adjusted so that the γ MONI signal becomes 4.5V. [8] Dot Diameter Correction Control 2 UNIT EXPLANATION Di850g.
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Di850g.book 8 ページ２００２年７月１２日金曜日午前８時３６分 DEVELOPING UNIT [9] FM2 (Developing Suction) Control 2 UNIT EXPLANATION FM2 CONT FM2 DRIVE FM2 EM FM2 PGND FM2 FEM PRCB MS2 MS1 24VDC PGND DCPS2 ACDB FM2 (Developing suction) is controlled by the PRCB (printer control board) via the ACDB (AC drive board). When the front right or left door of this machine opens or closes, MS1 (interlock 1) or MS2 (interlock 2) operates to interrupt the DC power supply, stopping FM2. 1. Operation a. b.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 TONER SUPPLY UNIT TONER SUPPLY UNIT [1] Composition 2 UNIT EXPLANATION Toner cartridge Toner supply motor 1 (M11) Push pressure lever Shutter Toner supply motor 2 (M15) [2] Mechanisms Mechanism Toner supply The agitator plates prevent the toner from clumping and accumulating on TLD (remaining toner detection sensor).
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 TONER SUPPLY UNIT 2 UNIT EXPLANATION *2 Toner cartridge When the toner cartridge rotates, toner is fed to the outlet of the cartridge through the spiral groove on the surface of the toner cartridge. When the outlet of the cartridge faces downward, toner flows out of the outlet into the agitation/supply section of the toner supply unit.
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3 ページ２００２年７月１２日金曜日午前８時３６分 TONER SUPPLY UNIT [4] M11 (Toner Supply 1) Control 2. Signals a. Input signal (1) TLD (TLD to PRCB) When the level of toner in the cartridge becomes low, this signal goes low [L], displaying a message on the LCD connected to the OB1. (2) M15 EM (M15 to PRCB) M15 fault detection signal. [L]: M15 normal [H]: M15 Abnormal b. Output signals (1) TLD CONT, TSEN_CONT (PRCB to TLD) TLD power control signal. The TLD is powered only when it is detecting the toner level.
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2 UNIT EXPLANATION Di850g.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 CLEANING/TONER RECYCLE UNIT CLEANING/TONER RECYCLE UNIT Blade drive motor (M14) Blade 2 Blade 1 Toner guide shaft Toner guide brush Vibration sheet Toner conveyance screw [2] Mechanisms Mechanism *1 Drum cleaning Method Cleaning blades (switched automatically) Toner collection Toner guide brush *2 Toner recycle Toner conveyance by screw *1 Drum cleaning Two cleaning blades are installed in the cleaning section.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 CLEANING/TONER RECYCLE UNIT [3] M14 (Blade) Control 2 UNIT EXPLANATION 5VDC PS30 SGND Blade Position Sensor Pressing CW/ Slight CW/ Switching CCW pressing CCW PS30 PS31 PS31 M14 DRIVE 1 M14 DRIVE 2 M14 PS30 OFF OFF ON or OFF* ON ON PS31 ON OFF OFF OFF ON *Note: CW/CCW indicate the M14 rotating direction for pressing, slight pressing, and switching. The sensor logic for slight pressing position is different between CW and CCW rotation.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT TRAY 1/2 PAPER FEED UNIT [1] Composition Side guides Feed roller Double feed prevention roller Trailing edge stopper Drive pulley Wire A Wire B Paper size detection VR1, 2 Up drive motor 1 (M19), 2 (M20) Paper size detection PS1-1, 2-1 (PS32, PS33) Paper size detection PS1-2, 2-2 (PS35, PS36) Caution: Trays 1 and 2 have the same shape and mechanisms.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT 2 UNIT EXPLANATION b) Lowering of up/down plate When the paper feed tray is pulled out, the guide lever shown below is disengaged from the rail, thus releasing the coupling gear that transmits the drive force of the up drive motor 1 (M19), 2 (M20) to the drive pulleys. Then, the up/down plate falls down naturally by the weight of papers.
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Di850g.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT 2 UNIT EXPLANATION 2. Signals a. PRCB input signals (1) PS47 (PS47 to PRCB) Paper passage detection signal (tray 1). [L]: Paper passed. [H]: Paper not passed. (2) PS49 (PS49 to PRCB) Paper passage detection signal (tray 2). [L]: Paper passed. [H]: Paper not passed. (3) PS48 (PS48 to PRCB) First paper feed paper detection signal (tray 1). [L]: Paper passed. [H]: Paper not passed.
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Di850g.book 5 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT [4] Paper Up Drive Control 5VDC PS14 SGND PS20 PS20 PS34 PS34 PS15 5VDC PS15 SGND PS21 PS21 PS37 PS37 5VDC SGND DCPS1 24VDC PGND DCPS2 24VDC M19 CONT 24VDC SD5 CONT 24VDC M20 CONT 24VDC SD6 CONT M19 SD5 M20 SD6 PRCB Papers stacked in the tray are pushed up by transmitting the drive force of M19 (up drive 1) or M20 (up drive 2) to the paper up/down plate in the tray via up/down wires.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT 2 UNIT EXPLANATION c. d. Remaining Paper Detection Control The level of paper remaining in each tray is detected according to the time that M19 or M20 requires to lift up the paper up/down plate when the tray is set. This lift-up time (operation time of M19 or M20) is recorded in the PRCB. Subsequently, remaining paper is detected by the paper feed counter.
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Di850g.book 7 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT [5] Paper Size Detection Control 5VDC PS32 SGND PS32 PS33 PS33 VR1 VR1 5VDC PS35 SGND PS35 PS36 PS36 VR2 VR2 a. Input signals (1) PS32 (PS32 to PRCB) Paper size detection switch ON/OFF signal (tray 1). (2) PS33 (PS33 to PRCB) Paper size detection switch ON/OFF signal (tray 1). (3) PS35 (PS35 to PRCB) Paper size detection switch ON/OFF signal (tray 2).
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Di850g.book 8 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 1/2 PAPER FEED UNIT 2 UNIT EXPLANATION [6] No Paper Detection Control 5VDC PS26 SGND PS26 5VDC PS27 SGND PS27 5VDC SGND PRCB DCPS1 No paper in the tray is detected by PS26 (no paper 1) and PS27 (no paper 2) which are controlled by the PRCB (printer control board). 1. Operation When the tray becomes empty, PS26 or PS27 is turned ON, displaying a message on LCD via the OB1 (operation board 1). 2. Signals a.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 3 PAPER FEED UNIT 2 UNIT EXPLANATION b) Lowering of up/down plate When the paper feed tray is pulled out, the guide lever shown below is disengaged from the rail, thus releasing the coupling gear that transmits the drive force of the up drive motor 3 (M21) to the drive pulleys. Then, the up/ down plate falls down mechanically by the weight of papers.
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 3 PAPER FEED UNIT [3] First Paper Feed Control PGND M4 CONT M4 EM M4 M4 CLK M4 F/R 24VDC DCPS2 PGND 5VDC SGND DCPS1 PS51 PS52 5VDC PS51 SGND 24VDC MC7 CONT PS52 MC8 CONT MC10 CONT MC7 MC8 MC10 PRCB The 1st paper feed from tray 3 takes place as the result of the transmission of the drive force from M4 (paper feed) to each paper feed roller, via MC7 (feed MC3) and MC8 (pre-registration MC3).
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 3 PAPER FEED UNIT 2 UNIT EXPLANATION [4] Paper Up Drive Control c. 5VDC SGND PS16 5VDC PS16 SGND PS22 PS22 24VDC PGND 24VDC PGND PS40 PS40 DCPS2 M21 24VDC M21 CONT SD7 24VDC SD7 CONT DCPS1 d. PRCB Papers stacked in the tray are pushed up by transmitting the drive force of M21 (up drive 3) to the paper up/ down plate in the tray via up/down wires. MC21 is controlled directly by PRCB (printer control board).
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Di850g.book 5 ページ２００２年７月１２日金曜日午前８時３６分 TRAY 3 PAPER FEED UNIT [6] No Paper Detection Control 5VDC PS38 SGND PS38 PS39 PS39 VR3 VR3 5VDC PS28 SGND PS28 5VDC SGND PRCB No paper in the tray is detected by PS28 (no paper 3) which is controlled by the PRCB (printer control board). 5VDC SGND PRCB DCPS1 DCPS1 1. Operation The paper size in tray 3 is detected using PS38 (paper size 1-3), PS39 (paper size 2-3) and paper size detection VR3.
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2 UNIT EXPLANATION Di850g.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 BY-PASS TRAY BY-PASS TRAY [1] Composition By-pass feed roller Paper feed swivel plate By-pass feed tray By-pass double feed prevention roller By-pass feed roller *2 [2] Mechanisms Mechanism *1 First paper feed *2 Paper lift-up Method Swivel roller Pick up solenoid (SD11) Paper up/down plate Paper lift-up When paper is set in the bypass tray, the up/ down motor (by-pass) (M22) drives the paper up/ down plate via gears.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 BY-PASS TRAY [3] First Paper Feed Control 2 UNIT EXPLANATION Paper size PS1 (PS55) 24VDC SD11 CONT 24VDC 24VDC SD11 M6 DRIVE A M6 DRIVE A M6 M6 DRIVE B M6 DRIVE B 24VDC 24VDC PGND PGND By-pass tray Paper size detection VR (VR4) PRCB Paper size PS2 (PS56) DCPS2 The 1st paper feed from the by-pass tray takes place as the result of the transmission of the drive force from M6 (loop roller) to the paper feed roller.
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 BY-PASS TRAY [4] Paper Up/down Control PS43 M22 5VDC PS23 SGND PS43 5VDC SGND DCPS1 24VDC PGND DCPS2 M22 DRIVE 1 M22 DRIVE 2 PRCB By-pass tray paper is moved up and down by transmitting the drive force of M22 (up/down (by-pass)). M22 is controlled directly by PRCB (printer control board). Related signals are PS23 (tray upper limit (by-pass tray)) and PS43 (tray lower limit (by-pass tray)). 1. Operation a. b. (1) (2) c.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 BY-PASS TRAY [5] Paper Size Detection Control 2 UNIT EXPLANATION 5VDC PS55 SGND [6] No Paper Detection Control PS55 5VDC PS29 SGND PS56 PS56 VR4 VR4 PS29 5VDC SGND PRCB DCPS1 5VDC SGND PRCB DCPS1 The size of paper in the by-pass tray is detected by PS55 (paper size 1 (by-pass tray)), PS56 (paper size 2 (by-pass tray)), and VR4 (paper size detection (bypass tray)).
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Di850g.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 VERTICAL PAPER CONVEYANCE SECTION [3] Vertical Paper Conveyance Control M4 CONT M4 EM M4 2 UNIT EXPLANATION earlier than the second paper feed operation starts. Accordingly, the paper condition in the second paper feed section is detected by PS53 to turn OFF MC9 and MC10, stopping the conveyance temporarily. M4 CLK M4 FR PS54 5VDC PS54 SGND PS18 PS18 PS53 PS53 PS19 PS19 24VDC 24VDC PGND PGND DCPS2 2.
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Di850g.
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3 ページ２００２年７月１２日金曜日午前８時３６分 ADU *1 *2 Second paper feed paper mis-centering correction PS1 (paper mis-centering) is mounted at the exit of the registration roller to detect mis-centering or inclination of paper fed from the second paper feed unit.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 ADU 2 UNIT EXPLANATION *5 Paper conveyance unit paper suction mechanism A paper suction duct is provided in the middle of the paper conveyance and leads to the developing suction fan (FM2) installed at the back of the main unit. To improve the paper transportability in the paper conveyance unit, the paper suction fan and duct are used to suck the paper passing through the paper conveyance unit.
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5 ページ２００２年７月１２日金曜日午前８時３６分 ADU 1 b) Straight ejection When paper is ejected straight, SD2 is turned ON to close the paper gate. The paper fed by the paper reverse/exit entrance roller is fed through the path over the paper gate because this gate is closed, then fed to the paper exit roller. Thus, the paper is ejected to the paper exit with the print side up.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 2 UNIT EXPLANATION ADU c) ADU paper conveyance In the two-sided copy mode, the paper finished with printing on the front side is fed, through the path under the paper gate, into the paper reverse/exit section just like paper reverse/exit operation. Then, the paper is fed to the ADU unit by paper reverse and eject rollers 1-3.
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7 ページ２００２年７月１２日金曜日午前８時３６分 ADU *9 Nonstack paper feed mechanism In the two-sided copy mode, the paper fed from the paper reverse/exit section is conveyed to the ADU section by the ADU reverse roller. When PS58 (ADU paper reverse) detects the trailing edge of paper and consequently turns OFF, the ADU reverse roller starts rotating in the opposite direction, feeding the paper backward.
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Di850g.book 8 ページ２００２年７月１２日金曜日午前８時３６分 2 UNIT EXPLANATION ADU *11 ADU section jam removal mechanism When a jam occurs in the ADU horizontal conveyance section, the jammed paper can be removed by opening the ADU horizontal conveyance unit jam access guide A. The paper jammed at the ADU exit can be removed by opening the ADU exit section jam access guide B.
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Di850g.book 9 ページ２００２年７月１２日金曜日午前８時３６分 ADU [3] Loop/Second Paper Feed Control 24VDC 24VDC M6 DRIVE A M6 DRIVE A 24VDC MC1 CONT 24VDC 5VDC -5VDC PS1 VIDEO PS1 SI PS1 CLK PS1 LED SGND PS44 5VDC PS44 SGND PS45 PS45 M6 M6 DRIVE B M6 DRIVE B MC1 PS1 PS54 PRCB 5VDC SGND DCPS1 24VDC PGND DCPS2 ADUSDB The paper fed from one of trays 1-3 is fed to the second paper feed unit.
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Di850g.book 10 ページ２００２年７月１２日金曜日午前８時３６分 ADU [4] Paper Conveyance Control 2 UNIT EXPLANATION 2. Signals a. PRCB input signals (1) PS54 (PS54 to PRCB) Loop formation reference timing detection signal. The leading edge or trailing edge of paper is detected. [L]: Paper exists [H]: Paper does not exist b. ADUSDB input signal (1) M12 EM (M12 to ADUSDB to PRCB) M12 fault detection signal. [L]: Normal [H]: Abnormal (2) PS1 VIDEO (PS1 to ADUSDB to PRCB) PS1 sensor output signal.
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Di850g.book 11 ページ２００２年７月１２日金曜日午前８時３６分 ADU 24VDC 24VDC M10 DRIVE A M10 DRIVE A M10 DRIVE B M10 DRIVE B 24VDC 24VDC M5 M5 DRIVE A M5 DRIVE A 5VDC PS61 SGND M5 DRIVE B M5 DRIVE B SD2 PS8 PS57 PS61 PS2 PS2 PS3 PS3 24VDC SD2 CONT M10 PRCB 5VDC PS8 SGND 5VDC SGND DCPS1 PS57 24VDC PGND ADUSDB DCPS2 The paper fed from the fixing unit is fed, through the paper reverse and conveyance section, to the exit tray or ADU. The paper reverse gate is driven by SD2 (paper reverse gate).
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Di850g.book 12 ページ２００２年７月１２日金曜日午前８時３６分 2 UNIT EXPLANATION ADU b) Linear velocity is changed to high speed when the trailing edge of the paper conveyed at low speed by M5 passes the nip of the fixing roller. Then M5 rotates backward at high speed and the paper is conveyed to the paper exit roller after a specified interval since the trailing edge of the paper turns OFF PS57.
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Di850g.book 13 ページ２００２年７月１２日金曜日午前８時３６分 ADU 24VDC 24VDC M5 24VDC 24VDC M5 DRIVE A M5 DRIVE A M7 DRIVE A M7 DRIVE A M5 DRIVE B M5 DRIVE B M7 DRIVE B M7 DRIVE B M7 5VDC PS58 SGND PS58 5VDC PS59 SGND PS59 5VDC PS60 SGND PS60 ADUSDB PRCB MS2 DCPS1 DCPS2 The paper fed from the paper reverse and eject section is fed to the ADU by M5 (paper reverse/exit). In the ADU, paper is reversed by transmitting the drive force of M7 (ADU reverse) to the paper reverse roller.
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Di850g.book 14 ページ２００２年７月１２日金曜日午前８時３６分 ADU 2 UNIT EXPLANATION 2. Signals a. ADUSDB input signals (1) PS58 (PS58 to ADUSDB to PRCB) Detection of paper passage in ADU paper reversal section. M7 is rotated in the opposite direction or turned OFF with reference to this signal. The leading edge or trailing edge of paper is detected. [L]: Paper exists [H]: Paper does not exist (2) PS59 (PS59 to ADUSDB to PRCB) Detection of reference timing for conveyance speed change.
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Di850g.book 16 ページ２００２年７月１２日金曜日午前８時３６分 ADU 2 UNIT EXPLANATION d. ADU lock control The ADU handle is locked by SD1. PS10 detects the handle position to determine whether the handle is locked or released. 2. Signals a. ADUSDB input signals (1) PS9 (PS9 to ADUSDB to PRCB) Detection of paper passage in ADU section. [L]: Paper exists [H]: Paper does not exist (2) PS10 (PS10 to ADUSDB to PRCB) Detection of ADU handle position.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 FIXING UNIT FIXING UNIT [1] Composition 1 6 2 8 7 19 9 18 17 10 11 16 12 15 5 4 14 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Cleaning web Fixing upper cover Fixing web motor (M16) Pressure release shaft Fixing paper exit unit Cleaning web wind-up shaft Pressure roller Cleaning web unwinding shaft Cleaning web Fixing upper roller 11. 12. 13. 14. 15. 16. 17. 18. 19.
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Di850g.
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3 ページ２００２年７月１２日金曜日午前８時３６分 FIXING UNIT *1 Fixing heater lamps Two halogen lamps are used for the fixing upper roller and one halogen lamp is used for the fixing heat roller. These halogen lamps are intended to reduce the warm-up time. *2 Cleaning Fixing upper roller: Cleaning web is used to clean the fixing upper roller. The cleaning web wind-up shaft is driven intermittently by the web drive motor (M16) via gears to supply cleaning web from the web roll.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 FIXING UNIT 2 UNIT EXPLANATION *5 Jam detection When a jam occurs in the paper exit section in the fixing unit, the jammed paper presses down the actuator, causing the fixing jam sensor (PS3) to detect a jam via the jam detection plate and actuator operation.
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Di850g.book 5 ページ２００２年７月１２日金曜日午前８時３６分 FIXING UNIT [3] M16 (Web Drive) Control PS2 5VDC PS2 SGND PS3 PS3 a. Input signals (1) PS2 (PS2 to PRCB) Detection of passage of paper at fixing unit exit. [L]: Paper exists [H]: Paper does not exist (2) PS3 (PS3 to PRCB) Fixing jam detection signal. [L]: Paper exists. (Jam is detected.) [H]: Paper does not exist. (Jam is not detected.) b. Output signal (1) M16 DRIVE 1, 2 (PRCB to M16) M16 drive control signal.
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7 ページ２００２年７月１２日金曜日午前８時３６分 FIXING UNIT b. Protection against abnormality Thermostats are used to prevent the temperature of the fixing rollers from rising abnormally. TS1 (thermostat 1 (upper)) is used for the fixing upper roller and TS2 (thermostat 2 (lower)) is used for the fixing heat roller respectively. Noncontact type thermostats are used, so they do not touch each rollers.
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Di850g.book 8 ページ２００２年７月１２日金曜日午前８時３６分 FIXING UNIT [5] SD3 (Fixing Guide) Control 24VDC 2 UNIT EXPLANATION SD3 CONT 5VDC PS45 SGND PRCB 5VDC SGND DCPS1 SD3 PS45 ADUSDB 24VDC PGND DCPS2 SD3 (fixing guide) is driven by ADUSDB (ADU stand drive board) and controlled by serial data sent from PRCB (printer control board). 1.
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Di850g.book 1 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL OTHER KINDS OF CONTROL [1] Parts Energized when the Main Switch is OFF SW1 CBR1 NF NF2 AC(H) AC(H) 5VDC AC(C) DCPS1 SW3 PSMB TRANSFORMER 2 TRANSFORMER 1 HTR4 HTR3 HTR2 HTR5 LCT 1. Operation a. b. c. d. e.
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Di850g.book 2 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL [2] Parts that Operate when the SW1 (Main) is Turned ON 2 UNIT EXPLANATION 5VDC RL1 CONT RL1 From ACDB Fixing heater power supply AC(H) AC(H) AC(C) AC(C) 5VDC -5VDC 12VDC SGND 5VDC DCPS1 RL2 AC(H) Power supplies for boards, motors, fans, solenoids, etc. 24VDC PGND 36VDC AC(C) DCPS2 5VDC RL2 CONT 5VDC RL3 CONT PSMB RL3 IP power supply 1. Operation 2. Signals a. a.
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Di850g.book 3 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL FM7 1. Operation a. (1) (2) b. (1) (2) A 24V DC motor is used for each cooling fan. FM1 ON timing Held ON during copy operation. OFF timing Turned OFF at specified time after copying complete. FM3, FM4, and FM6 ON timing • Turned ON after completion of the first warmup after power-ON. • During warm-up, turned ON when the drum starts rotating.
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Di850g.book 4 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL 2 UNIT EXPLANATION 2. Signals a. PRCB input signals (1) FM3 EM (FM3 to PRCB) FM3 fault detection signal. [H]: Fault is detected (2) FM4 EM (FM4 to PRCB) FM4 fault detection signal. [H]: Fault is detected (3) FM5 EM (FM5 to PRCB) FM5 fault detection signal. [H]: Fault is detected (4) FM6 EM (FM6 to PRCB) FM6 fault detection signal. [H]: Fault is detected (5) FM6 FEM (ACDB to PRCB) FM6’s 24 V DC power detection signal.
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5 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL d. ADUSDB output signal (1) FM1 DRIVE (ADUSDB to FM1) FM1 ON/OFF control signal. [L]: FM1 ON [H]: FM1 OFF (2) FM10 DRIVE (ADUSDB to FM10) FM10 ON/OFF control signal. [L]: FM10 ON [H]: FM10 OFF (3) FM11 DRIVE (ADUSDB to FM11) FM11 ON/OFF control signal. [L]: FM10 ON [H]: FM10 OFF e. ACDB output signals (1) FM3 DRIVE (ACDB to FM3) FM3 ON/OFF control signal. [L]: FM3 ON [H]: FM3 OFF (2) FM4 DRIVE (ACDB to FM4) FM4 ON/OFF control signal.
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Di850g.book 6 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL [4] Operation Panel Control 2 UNIT EXPLANATION OB1 TXD OB1 RXD OB1 TXD ACK OB1 RXD ACK OB1 TXD REQ OB1 RXD REQ OB1 LCD OBINVB ICB WT LED ST LED SGND PSMB OB2 5VDC JAM L1 JAM L2 JAM L3 JAM L4 JAM L5 SGND PRCB 12VDC 5VDC SGND JAMIB ADUSDB The operation panel consists of OB1 (operation board 1), OB2 (operation board 2), and LCD (indicator board). On the backlight control board is mounted an LCD.
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7 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL 2. Signals a. PRCB input signals (1) OB1 RXD (OB1 to ICB) Serial data which informs ICB of the operation state of OB1. (2) OB1 TXD REQ (OB1 to ICB) Signal which indicates that data is being sent from OB1 to ICB. [H]: PRCB stops sending the PB1 TXD signal. (3) OB1 TXD ACK (OB1 to ICB) Acknowledgment signal which is returned each time OB1 receives one-byte data from ICB. b.
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Di850g.book 8 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL [5] Counter Control 2. Signals a. Input signals (1) PS61 (PS61 to PRCB) Signal indicating passage of paper in the paper exit section. [L]: PS61 is turned ON to indicate that paper has been ejected. (2) C (K) 24V 1F (ACDB to PRCB) Signal indicating the state of 24 V power supply to C (K). [L]: 24V power is not supplied. b. Output signals (1) C (T) CONT (PRCB to ACDB to C (T)) C (T) drive control signal.
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Di850g.book 9 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL [6] Option Control LCT FNS (FN-7 / FN-115) ICB LAN RB HD OP IFB ICB IFB Controller EDH INDICATOR LAMP 5VDC SGND DCPS1 24VDC PGND PRCB COIN VENDOR DCPS2 24VDC PGND ACDB Options such as LCT and FNS are controlled by the PRCB (printer control board). 1. Operation The FNS incorporates a CB which exchanges only control data with the PRCB of the main unit. The LCT and FNS are powered by the DCPS1 (DC power supply unit 1).
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Di850g.book 10 ページ２００２年７月１２日金曜日午前８時３６分 OTHER KINDS OF CONTROL Connector Pin No. Signal name C(K) SIG Key counter connection recognition 3 C(K) GND Signal ground 4 C(K) DRIVE Key counter signal count up 5 PGND 2 UNIT EXPLANATION Signal type 24 V, 300 mA – 100-ms L-signal output after paper ejection.
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Service Manual [General] Di850 Copyright 2002 MINOLTA CO., LTD. Use of this manual should be strictly supervised to avoid disclosure of confidential information. MINOLTA Co.,Ltd.