Oki OL600E, OL610EPS, OL610E User Manual

Chapter 0 Front Cover

OKI OL600/610ex (96-01-18

Trademark Information

HP and LaserJet are registered trademarks of Hewlett-Packard Company. Adobe and PostScript are trademarks

OKI OL600/610ex (96-01-18

Chapter 1 %1.1 System Configuration

1.1 System Configuration OL600e, OL610e and OL610e/PS consist of control and engine blocks in the standard configu-ration, as shown in In addition, the options marked with an asterisk (*) are available.

Figure 1-1

OKI OL600/610ex (96-01-18

%1.2 Printer Configuration

1.2 Printer Configuration The printer unit consists of the following hardware components:

• Electrophotographic Processor • Paper Feeder • Main Control PCB • Operator Panel (OL610e/PS) • Power Supply Unit • PS Board (OL610e/PS) The printer unit configuration is shown in Figure 1-2.

Figure 1-2

OKI OL600/610ex (96-01-18

%1.3 Optional Configuration

1.3 Optional Configuration The options shown below are available for use with OL600e, OL610e and OL610e/PS. These are available separately from the printer unit.

(1) 1MB Memory Expansion Board (OL600e/610e)

(2) SIMM (Single In-line Memory Module)

(3) Legal/Universal Paper Cassette

(4) High Capacity Second Paper Feeder

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(5) Multi-Purpose Feeder

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%1.4 Specification

1.4 Specification (1) Type Desktop (2) External dimensions Height 6.3" (160 mm) Width 12.6" (320 mm) Depth 14.17" (360 mm) (3) Weight 8 kg (4) Developing method Dry electrophotography Exposing method LED stationary head (5) Paper used feed) Label Envelope OHP paper (Transparency)

• Standard sizes Letter (ODA) Legal (option) Executive Envelope A4 A5 B5 A6 • Applicable

Size

sizes Width: 3.94" to 8.5" (100 to 216 mm) Length: 5.83" to 14" (148 to 355.6 mm)

Thickness

(transparency) Envelope (6) Printing speed First print: 25 sec. Continuous print: 6 pages/min. for letter size paper Warm-up time: 60 sec. [at room temperature 77°F (25°C) and rated voltage (120 VAC)] (7) Paper feeding method Automatic feed or manual feed (8) Paper delivery method Face down/face up (9) Resolution OL600e: 300 x 300 dots/inch OL600e (Hiper-W driver), OL610e, OL610e/PS: 600 x 600 dots/inch (10) Power input 120 VAC +5.5%, 15% (ODA) 230 VAC +15%, 15% (ODA) (11) Power consumption Peak: Approx. 420W Typical operation: Approx. 160W Idle: Approx. 55W Power save mode: Approx. 15W (12) Temperature and humidity During operation: 50 to 90°F (10 to 32°C) In storage: 14 to 110°F (10 to 43°C) (13) Noise During operation: 48 dB (A) or less Standby: 38 dB (A) or less (14) Consumables Toner cartridge kit 2,000 (5% duty) Image drum cartridge 20,000 (at continuous printing) 15,000 (3 pages/job) 10,000 (1 page/job)

Automatic feed: 16 to 24 lbs (60 to 90 g/m 2 ) Manual feed: Label, OHP paper

• Standard paper e.g. Xerox 4200 (20 lbs) • Application paper (manual face-up

Type

OKI OL600/610ex (96-01-18

%1.5 Safety Standards - 1.5.1 Certification Label

1.5 Safety Standards

1.5.1 Certification Label The safety certification label is affixed to the printer at the location shown below.

OKI OL600/610ex (96-01-18

%1.5.2 Warning Labels

1.5.2 Warning Labels The warning labels are affixed to the sections that may cause bodily injury. Follow the instructions on warning labels during maintenance.

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%1.5.3 Warning/Caution Markings

1.5.3 Warning/Caution Markings The following warning and caution markings appear on the power supply board.

ENGLISH Heatsink and transformer core present risk of electric shock. Test before touching. FRENCH Le dissipateur thermique et le noyau du transformateur présentent des risques de choc électrique. Testez avant de, manipuler. SPANISH Las disipadores de color el núcel del transformador pueden producir un choque eléctrico. Compruebe antes de tocar. PORTUGUESE O dissipador de calor e o núcleo do fransiormador apresentam risco de choque elétrico. Teste antes de focar. ENGLISH Circuits may be live after fuses open. FRENCH Il se peut que les circuits soient sous tension une fois que les fusibles ont été rerirés. SPANISH Las circuitos pueden estar activos una vez que se hayan abierio los fusibles. PORTUGUESE Os circuitos podem estar energizados após os fusiveis se queimarem.

OKI OL600/610ex (96-01-18

Chapter 2

a e

%Operation Description

2. OPERATION DESCRIPTION The OL600e, OL610e and OL610e/PS consist of a Main Control PCB, a PostScript board (OL610e/PS), a power s The control board and the PostScript board receive data via the host I/F;these then decode, edit and store the dat The data is printed on the paper by means of the electrophotographic process mechanism. The OL600e and OL610e use proprietary software to control printer operations and status monitoring. The OL610 Figure 2-1 shows the OL600e block diagram. Figure 2-2 shows the OL610e block diagram. Figure 2-3 shows the OL610e/PS block diagram.

OKI OL600/610ex (96-01-18

Figure 2-1 OL600e Block Diagram

OKI OL600/610ex (96-01-18

Figure 2-2 OL610e Block Diagram

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Figure 2-3 OL610e/PS Block Diagram

OKI OL600/610ex (96-01-18

%2.1 Control Board

2.1 Control Board The control board consists of a single chip CPU, Program & Font ROMsone DRAM for the OL600e, two DRAMs for the OL610ean EEPROM, a host interface circuit, and a mechanism driving circuit. (1) Single chip CPU The single chip CPU is a custom CPU (32-bit internal bus, 16-bit external bus, 25.54 MHz clock with input frequency from a 12.27 MHz clock) which incorporates the MIPS 3000 RISC CPU and its peripheral devices, and has the following functions:

Built-in device Function

Chip select controller Bus controller DRAM controller

DMA controller Transfer of image data from DRAM to video output port Parallel interface controller Control of Centronics parallel interface Serial interface controller Control of RS-232C serial interface Video output port

LED STB output port Timer Generation of various control timing signals

Serial I/O port Control of operator panel EEPROM and options I/O port Input and output of sensor and motor signals

(2) Program & Font ROM OL600e/610e The Program & Font ROM stores the equipment program and various types of fonts. EPROM or Mask ROM is used for a Program & Font ROM. The mounting location of this Program & Font ROM varies depending on the type of ROM (for the mounting location see 7.2). OL610e/PS The Program ROM & Font ROM store the HP4 emulation program and various types of fonts. Mask ROM is used for a Program & Font ROM. (3) DRAM OL600e/610e The DRAM is a resident memory1MB in the OL600e, 2MB in the OL610eused as a buffer; it stores edited data, image data, DLL data, and macro data. OL610e/PS The DRAM is resident memory (2MB on the board plus 0.5MB on the PS board) used as a buffer; it stores edited data, image data, DLL data, and macro data. In PostScript mode, it is used as VM and font cache also. (4) EEPROM 1,024-bit Electrically Erasable PROM (EEPROM), is loaded with the following data:

Menu data • Various counter data (Page counter, Drum counter) • Adjusting parameters (LED head

•

drive time, print start position, paper feed length) (5) Parallel Interface Parallel data is received from the host system via parallel interface which conforms to the Centronics specification. IEEE 1284 spcification bi-directional parallel is supported.

Control of ROM DRAM and I/O device

Control of LED head

Monitoring of paper running and paper size

OKI OL600/610ex (96-01-18

%2.2 PS Board (OL610e/PS)

2.2 PS Board (OL610e/PS) The PS board consists of two Program & Font ROM's, DRAM's, an EEPROM, and a host interface circuit. (1) Program & Font ROM's The Program & Font ROMs store the PostScript Level II program and its fonts. Mask ROM is used for the Program & Font ROMs. (2) DRAM

0.5MB of DRAM's reside on the PS board. (3) EEPROM 4,096 bit-Electrically Erasable PROM (EEPROM) is mounted on the PS board for storing the PostScript's menu settings. (4) LocalTalk I/F AppleTalk protocol data is received from the host system via LocalTalk interface. The block diagram is shown in Figure 2-4.

Figure 2-4 PS Board Block Diagram

OKI OL600/610ex (96-01-18

%2.3 Power Supply Board

2.3 Power Supply Board The power supply board consists of an AC filter circuit, a low voltage power supply circuit, a high voltage power supply circuit, heater drive circuit, and photosensors. (1) Low Voltage Power Supply Circuit This circuit generates the following voltages.

Output voltage Use +5 V Logic circuit supply voltage +30 V Motor and fan drive voltage and source

voltage for high-voltage supply

+8 V Analog supply voltage

-8 V PS board and analog circuit supply voltage

(2) High Voltage Power Supply Circuit This circuit generates following voltages required for electrophotographic process from +5 V, according to the control sequence from the control board. When cover open state is detected, +5 V supply is interrupted automatically to stop the supply of all high-voltage outputs.

Output Voltage Use Remarks CH -1.35 KV Voltage applied to charging

roller

DB -300 V/+300 V Voltage applied to developing

roller

SB -450 V/ 0 V Voltage applied to toner supply

roller TR +500 V to +4 KV/-750 V Voltage applied to transfer roller Variable CB +400 V Voltage applied to cleaning

roller

(3) Photosensor The photosensor mounted on this power supply board monitors the paper running state during printing. The sensor layout diagram is shown in Figure 2-3.

OKI OL600/610ex (96-01-18

Figure 2.5

Sensor Function Sensing state Inlet sensor 1 Detects the leading edge of the paper and gives

the supervision timing for switching from hopping operation to feeding operation. Monitors paper feeding situation and paper size based on the paper arrival time and running time.

Intel sensor 2 Detects the form width. ON: A4 or larger

Paper sensor Detects the leading portion of the paper.

Monitors the paper feeding situation.

Outlet sensor Monitors the paper feeding and size according

to the time of arrival to and leaving past the sensor.

Paper end sensor Detects the end of the paper. ON: Paper exists.

Toner low sensor Detects the lack of toner. - - - - -

ON: Paper exists. OFF: No paper exists.

OFF: Smaller than A4 ON: Paper exists.

OFF: No paper exists. ON: Paper exists.

OFF: No paper exists.

OKI OL600/610ex (96-01-18

?%2.4 Electrophotographic Process - 2.4.1 Electrophotographic Process Mechanism

2.4 Electrophotographic Process

2.4.1 Electrophotographic Process Mechanism This mechanism uses the electrophotographic process to print image data supplied by the control board. The layout of the electrophotographic process mechanism is shown in Figure 2-6.

Figure 2-6 (1) Image Drum Unit The image drum unit consists of a light-sensitive drum, a charger, and a developer. The unit forms a toner image on the sensitive drum, using an electrostatic latent image formed by the LED head. (2) Registration Motor The registration motor is a pulse motor of 48 steps/rotation, which is two-phase excited by the signal from the Main Control PCB. It drives the hopping and registration rollers via two one-way clutches according to the direction of rotation. (3) Drum Motor The drum motor is a pulse motor of 48 steps/rotation, which is two-phase excited by the signal from the Main Control PCB and is the main motor of this mechanism. (4) LED Head Image data for each dot line from the control board is received by the shift register and latch register. The 2560/2496 LEDs are driven to radiate the image data on the image drum. (5) Fuser The fuser consists of a heater, a heat roller, a thermistor and a thermostat. The AC voltage from the power supply board is applied to the heater controlled by the HEATON signal from the control board. This AC voltage heats the heater. The Main Control PCB monitors the heat roller temperature via the thermistor, and regulates the heater roller to a predetermined temperature (165°C) by connecting or disconnecting the AC voltage supply to the heater. When the temperature of the heater roller rises abnormally, the thermostat of the heater voltage supply circuit becomes active and cuts the AC voltage supply.

OKI OL600/610ex (96-01-18

%2.4.2 Electrophotographic Process

2.4.2 Electrophotographic Process The electrophotographic processing is outlined below. Figure 2-7 shows the electrophotographic printing process.

Charging

The surface of the image drum is given a uniform negative charge by applying the negative voltage to the charge roller.

Exposure

Light emitted from the LED head irradiates the negatively charged surface of the image drum. The surface potential of the irradiated portion becomes lower, forming the electrostatic latent image associated with the print image.

Developing and toner recovery

When the negatively charged toner is brought into contact with the image drum, it is attracted to the electrostatic latent image by static electricity, making the image visible. At the same time, the residual toner on the image drum is attracted to the developing roller by static electricity.

Transfer

When paper is placed over the image drum surface, the positive charge which is opposite in polarity to that of the toner, is applied to the reverse side by the transfer roller. The toner is attracted by the positive charge and is transferred onto the paper. This transfers the toner image formed on the image drum onto the paper.

Temporary cleaning

Residual toner, which remains on the image drum without being transferred, is evened out by the cleaning roller and is attracted to the cleaning roller by static electricity.

Fusing

The transferred toner image is fused to the paper by heat and pressure. Figure 2-8 shows an electrophotographic process timing chart.

OKI OL600/610ex (96-01-18

Figure 2-7

Figure 2-8

OKI OL600/610ex (96-01-18

%2.4.3 Process Operation Descriptions - Hopping and Feeding

2.4.3 Process Operation Descriptions (1) Hopping and Feeding Hopping and feeding motions are actuated by a single registration motor in the mechanism as shown below:

The registration motor turning in direction "a" drives the hopping roller. The registration motor turning in direction "b" drives the registration roller. The registration and hopping gears have one-way bearings, so turning any of these gears in the reverse direction will not transmit the motion to the corresponding roller. (a) Hopping

For hopping, the registration motor turns in direction "a" (CW direction) and drives the hopping roller to

advance the paper until the inlet sensor turns on (in this case, the registration gear also turns, but the registration roller is prevented from turning by the one-way bearings).

After inlet sensor is turned on by the paper advance, the paper is further advanced to a predetermined

distance until the paper hits the registration roller (the skew of the paper can thus be corrected).

OKI OL600/610ex (96-01-18

(b) Feeding

When hopping is completed, the registration motor turning in direction "b" (CCW direction) drives the registration roller to advance the paper (in this case, the hopping gear also turns, but the hopping roller is prevented from turning by the one-way bearings).

The paper is further advanced in synchronization with the print data.

OKI OL600/610ex (96-01-18

%Charging

(2) Charging Charging is actuated by the application of the DC voltage to the charge roller that is in contact with the image drum surface.

The charge roller consists of two layers: a conductive layer and a surface protective layer, both having elasticity to secure good contact with the image drum. When the DC voltage applied by the power supply exceeds the threshold value, charging begins. The applied voltage is proportional to the charge potential, with an offset of approximately 550V.

OKI OL600/610ex (96-01-18

%Exposure

(3) Exposure Light emitted by the LED head irradiates the image drum surface with a negative charge. The surface potential of the irradiated portion drops, forming an electrostatic latent image associated with the image signal.

The image drum is coated with an underlayer (UL), a carrier generation layer (CGL), and carrier transfer layer (CTL) on aluminum base. The organic photo-conductor layer (OPC), comprising CTL and CGL, is about 20 µm thick.

The image roller surface is charged to about 750 V by the contact charge of the charge roller. When the light from the LED head irradiates the image drum surface, the light energy generates positive and negative carriers in the CGL. The positive carriers are moved to the CTL by an electrical field acting on the image drum. Likewise, the negative carriers flow into the aluminum layer (ground). The positive carriers moved to the CTL combine with the negative charges on the image drum surface accumulated by the contact charge of the charge roller, lowering the potential on the image drum surface. The resultant drop in the potential of the irradiated portion of the image drum surface forms an electrostatic latent image on it. The irradiated portion of the image drum surface is kept to about 100 V.

OKI OL600/610ex (96-01-18

%Developing

(4) Developing Toner is attracted to the electrostatic latent image on the image drum surface, converting it into a visible toner image. Developing takes place through the contact between the image drum and the developing roller.

As the toner supply roller rotates while rubbing on the developing roller, a friction charge is generated

between the developing roller and the toner, allowing the toner to be attracted to the developing roller (the developing roller surface is charged positive and the toner is charged negative).

The toner attracted to the developing roller is scraped off by the doctor blade, forming a thin coat of

toner on the developing roller surface.

Toner is attracted to the exposed portion (low-potential part) of the image drum at the contact of the

image drum and the developing roller, making the electrostatic latent image visible.

Note:

The bias voltage required during the developing process is supplied to the toner supply roller and the developing roller, as shown in the diagram below. 450 VDC is supplied to the toner supply roller, 300 VDC to the developing roller.

OKI OL600/610ex (96-01-18

%Transfer

(5) Transfer The transfer roller is composed of conductive sponge material, and is designed to get the image drum surface and the paper in a close contact. Paper is placed over the image drum surface, and the positive charge, opposite in polarity to that of the toner, is applied to the paper from the reverse side. The application of a high positive voltage from the power supply to the transfer roller causes the positive charge inducement on the transfer roller surface, transferring the charge to the paper as it contacts the transfer roller. The toner with negative charge is attracted to the image drum surface, and it is transferred to the upper side of the paper due to the positive charge on the reverse side of the paper.

OKI OL600/610ex (96-01-18

%Fusing

(6) Fusing When the image transfer is completed, the toner image is fused to the paper by heat and pressure as the paper with the toner image passes between the heater roller and the back-up roller. The heater roller with Teflon coating incorporates a 400W heater (Halogen lamp), which heats the roller. A thermistor, which is in contact with the heater roller, regulates the temperature of the heater roller at a predetermined level (about 165°C). A safety thermostat cuts voltage supply to the heater off by opening the thermostat in the event of abnormal temperature rises. The back-up roller is held under a pressure of 3.8 kg applied by the pressure spring on each side.

OKI OL600/610ex (96-01-18

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Oki OL600E, OL610EPS, OL610E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

%Operation Description