Hardware components. Xerox 4090, 4050

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Hardware components. Xerox 4090, 4050 | Manualzz

2.

Hardware components

This chapter is an overview of the Xerox 4050/4090/4650 Laser

Printing System (LPS) storage and memory, hardware components, additional features, and optional printer components.

Refer to the Xerox 4450 Mid-Range Printer Product Reference for information on the hardware components of the 4450 MRP.

LPS system disk storage and memory

The system disks store the operating system software and the system resources, such as fonts, forms, and graphics, you want to load into memory for use during input processing. There are several types of memory used with the LPS.

System disks

The 4050/4450 LPS has two standard 50 MB system disks.

Optional expansion of up to 200 MB in 50 MB increments is available.

The 4090/4650 LPS has two standard 170 MB disks. Optional expansion of up to two additional 170, 182, or 380 MB drives is also available.

Font memory

Each character in a font set is composed of a unique pattern of dots. Font memory stores the data representation of each character in an individual memory location. If a job requires multiple fonts, more font memory may be needed.

The 4050/4450LPS has 8 MB of font memory which is expandable to 16 MB.

The 4090/4650 LPS has 16 MB of font memory which is expandable to 32 MB.

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE 2-1

HARDWARE COMPONENTS

Graphics

Graphics are handled using the methods shown in table 2-1.

Table 2-1.

Graphics options

Method

Graphics

Handling Option

(4050/4450 LPS)

Graphics Video

Generator

(4090/4650 LPS)

Raster Image

Processor

How it works . . .

GHO has 8 MB of graphic memory which allows the 4050/4450

LPS to receive digitized graphic data.

GVG has an optional 32 or 256 MB of graphic memory which allows the 4090/4650 LPS to receive digitized graphic data.

GHO and GVG accept graphic data encoded according to the

Xerox Interpress Standard. Sources of graphic data include the following:

Graphic data generated by the Electronic Printing Image

Construction (EPIC) host-resident software

Scanned images from the Xerox 7650 Pro Imager using a

Xerox Publishing Illustrator Workstation (XPIW)

• Scanned images from the 150 Graphic Input Station (GIS).

The RIP performs vector to raster conversion in support of the

Interpress 3.0 Publication Set. It provides multiple forms capability for any given page and allows you to print text and image files which would otherwise be unprintable or incomplete because of complexity. RIP allows you to use two forms per page and more than 16 graphics on a page for

Interpress applications.

4050/4090/4650 basic components

The LPS consists of two separate units: the system controller and the printer.

Figure 2-1.

Xerox Laser Printing System

2-2 XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

HARDWARE COMPONENTS

System controller

System controller components

The system controller provides the interface capability, data handling, formatting, buffering, and operator control for the LPS.

It contains the input subsystem and the control subsystem electronics.

The input subsystem provides interfacing capabilities (online, offline, Ethernet, OEM, and DEC) for a variety of input sources

(host, magnetic tape, workstations, and graphic scanners).

The control subsystem performs all data handling, formatting, buffering, and operational control of the system.

The standard system controller components are the terminal, system controller panel, floppy disk drive, and the system disks.

The standard system controller components are the floppy disk drive, the system disks, the system controller panel, and the terminal. Figure 2-2 shows the standard and optional system controller components.

Figure 2-2.

LPS system controller

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

1. 9-track magnetic tape drive

2. Floppy disk drive

3. System controller panel

4. Terminal and keyboard

2-3

HARDWARE COMPONENTS

Floppy disk drive

Terminal

The floppy disk drive provides an alternative input for loading operating system software, user files, and fonts to the system disks. You can also use the floppy disk drive for diagnostics and to back up resident user files and fonts on 5.25-inch, doublesided, high-density floppy disks. You cannot use it as an input source for print jobs.

The floppy disk drive has a total of 1404 available sectors. Sector configuration is 78 cylinders, 2 tracks per cylinder, 18 sectors per cylinder, and 512 bytes per sector.

The terminal consists of two components: the keyboard and the display as shown in figure 2-3. The keyboard is your means of communicating with the LPS; the display is the printing system means of communicating with you. The commands you enter at the keyboard control functions (such as loading the operating system, switching between online and offline processing modes, starting jobs, requesting sample prints, and obtaining accounting summaries).

Figure 2-3.

Keyboard and display terminal

System controller panel

1. Display

2. Keyboard

The system control panel contains buttons which turn the system on and off, boot the system, and switch between local and remote modes as shown in figure 2-4.

Figure 2-4.

System controller panel

2-4

System disks System disks store the operating system software, fonts, forms, and general user files for the LPS.

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

System controller options

HARDWARE COMPONENTS

The 4050/4450 LPS has two standard 50 MB system disks.

Optional expansion of up to 200 MB in 50 MB increments is available.

The 4090/4650 LPS has two standard 170 MB system disks.

Optional expansion using 170 MB, 182 MB, or 380 MB system disks are available.

The system controller offers two options which enhance the capabilities of the LPS: the 9-track magnetic tape drive and the

180 18-track cartridge tape drive.

Note: These options are not available on the 4450 mid-range printer.

9-track magnetic tape drive

The optional 9-track magnetic tape drive offers an alternative to online operations. This tape drive supports 9-track, 1600 bits per inch (bpi), phase encoded (pe) magnetic tapes and 6250 bpi,

Group Code Recording (GCR) encoded magnetic tapes. Refer to the Xerox 4050/4090/4450/4650 LPS Operator Guide for information on using the 9-track magnetic tape drive which is shown in figure 2-5.

Figure 2-5.

System controller with 9-track magnetic tape drive

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE 2-5

HARDWARE COMPONENTS

18-track 180 Cartridge Tape System

You can add the detached 18-track, Xerox 180 Cartridge Tape

System (CTS) to your system as an alternative to the 9-track magnetic tape drive, or as an additional offline capability for the system. This tape drive supports IBM- and ANSI-compatible, 0.5inch tape in the 18-track, IBM 3480 data format.

You can use the 180 CTS as a source for loading and backing up your user files and fonts and as an input source for print jobs.

This tape drive also offers you additional offline capabilities for sending print and nonprint data to the LPS. The Xerox 180 CTS is available with a single or a dual tape transport as shown in figure 2-6.

Figure 2-6.

180 CTS with transport options

Printer

Printer components

2-6

1. Single transport

2. Dual transport

The LPS printer is a high-performance printer with built-in intelligence which provides the LPS the output capabilities to produce high-quality publications.

The standard LPS printer components are the printer control console, the sample tray, and the feeder trays as shown in figure

2-7. Labels are located throughout the printer to assist you with a variety of tasks such as clearing a paper jam. The printer also has the capability to sound an audible tone to direct your attention to a printer problem. Your service representative can adjust the volume of this tone.

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

HARDWARE COMPONENTS

The printer provides control buttons and displays for basic printer functions and status information. The printer control console contains message and graphic displays which assist you with jam clearance and printer maintenance.

The printer also contains an information button (i) which provides you with access to extended messages. LEDs on the control panel indicate feeder status. The dual stacker configuration contains tray select buttons, located next to each stacker tray, which allow you to divert output to the other stacker tray.

Figure 2-7.

Printer components

Printer control console

Reference

1. Printer control console

2. Sample tray

3. Stacker tray 1

4. Stacker tray 2

5. Feeder tray 2

6. Feeder tray 1

Refer to the Xerox 4050/4090/4450/4650 LPS Operator Guide for more information on operating the printer.

A control console located on the printer, shown in figure 2-8, contains message and graphic displays, Information, Stop,

Continue, and Sample buttons, an On/Off switch, and indicator lights showing which feeder tray is active and the paper size in use.

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE 2-7

HARDWARE COMPONENTS

Figure 2-8.

Printer control console

Reference

1. Continue button

2. Stop button

3. Print quantity display

4. Information button

5. Message display

6. Graphic display

7. Wire percentage indicator

8. Feeder tray indicators

9. Sample button

10. On/off switch

Refer to the Xerox 4050/4090/4450/4650 LPS Operator Guide for more information on operating the printer control console.

Additional features

Instruction labels

Audible tones

Language button

Instruction labels are located throughout the printer to assist you with a variety of tasks.

For certain conditions, audible tones call your attention to the printer. The volume may be adjusted by a service representative.

Systems with the language option have a Language button that you use for selecting a different language for the message display; for example, French instead of English.

2-8 XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

HARDWARE COMPONENTS

Optional printer components

There are four options available with the LPS printer:

Dual stacker configuration

High-capacity stitcher/stacker configuration

High-capacity feeder configuration

Bypass transport.

Dual stacker configuration

Reference

The dual stacker configuration offers two output trays with the ability for automatic tray switching. This allows you to program the system to route output to the inactive output tray when the active output tray is full. This feature allows you to unload a tray without any interruption to the printing process as long as an output tray is ready. If the inactive output tray is not ready when the active output tray reaches its capacity, the system stops printing. You can continue normal processing once an output tray is ready.

You can select either output tray. If both trays are in the ready mode, and neither is selected manually, the system selects tray 1.

You can change your tray selection at any time, provided the alternate output tray is in the ready mode.

You can also select one of the output trays as the sample tray, except when you use transparencies.

Refer to the “SELECT command” section in the Xerox

4050/4090/4450/4650 LPS Command Reference for instructions.

You can program the system to offset each output set approximately 0.5 inch from the previous set.

High-capacity stitcher/stacker configuration

The stitcher/stacker tray holds up to 2,000 sheets of unstitched paper. If you want the system to stitch your output, it is collected inside the output module, stitched, and ejected into the output tray. The system can stitch up to 50 sheets in each set.

You can program the system to offset each output set approximately 0.5 inch from the previous set.

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE 2-9

HARDWARE COMPONENTS

High-capacity feeder configuration

The high-capacity Feeder (HCF), shown in figure 2-9, is an optional configuration for your LPS. This option allows you to customize your printer to increase its efficiency and use specialized applications. The HCF provides two additional feeder trays and increases the feeder capacity by approximately 2,000 sheets.

Feeder trays 3 and 4 each hold 1,000 sheets of 20 pound/75 gsm paper. They work interchangeably with feeder trays 1 and 2, allowing automatic tray switching and offering increased uninterrupted printing time.

Figure 2-9.

LPS with high-capacity feeder

1. High-capacity feeder

2. Feeder tray 3

3. Feeder tray 4

2-10 XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

HARDWARE COMPONENTS

Bypass transport

The LPS bypass transport option, shown in figure 2-10, enables third-party finishing equipment to connect to and interface directly with your LPS.

The bypass transport fits into tray 1 of the dual stacker output module configuration. Your LPS and third-party finishing devices connect by aligning a finishing device with the bypass transport exit slot, or by physically and electrically linking a finishing device with the LPS bypass transport output module.

Third-party devices perform a variety of finishing tasks, such as saddle-stitching, binding, folding, stapling, trimming, and stacking.

Figure 2-10.

Laser printing system with bypass transport

Subsystems

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

The LPS contains five subsystems that perform the tasks necessary to meet the requirements of the system. These subsystems are as follows:

Input

Control

Imaging

Xerographic

Output.

2-11

HARDWARE COMPONENTS

Input subsystem

Interface

Offline

Ethernet

OEM

DEC

Online

The input subsystem receives print and nonprint file input through the offline interface, the OEM interface, the DEC interface, the Ethernet interface, or the online interface.

A selectable system allows a choice between operational modes.

Input is obtained from the sources shown in table 2-2.

Table 2-2.

Interface sources

Source

9-track (1600 or 6250 bpi) magnetic tape using the magnetic tape drive or from 18-track cartridge using the 180 18-track

CTS.

Workstations (such as the 6085) and graphic scanners (150 GIS or 7650 Pro Imager) in a shared or unshared, but accessible, network.

A remote IBM-compatible host computer system using the 871-

Communications Module (CM). This permits ASCII and EBCDIC data transmission to the 4050/4090/4450/4650 LPS.

Transmissions can occur in the System Network Architecture and Synchronous Data Link Control (SNA and SDLC) protocol environment and the Binary Synchronous Communications

(BSC) protocol environment.

A VAX/VMS system. This permits synchronous data transmission to the 4050/4090/4450/4650 LPS in a DEC Data Communications

Message Protocol (DDCMP) environment.

A channel-attached host. All IBM systems which support the channel-attached 3811/3211 and 4245 interface are supported.

(Non-IBM systems are supported through a variety of third-party connections.)

Control subsystem

The control subsystem performs . . .

All data handling

Formatting

Buffering

Operational control

2-12

Table 2-3 is a summary of the control subsystem.

Table 2-3.

Control subsystem features

It consists of . . .

System controller

Main memory

Terminal

Two to four system disks

Interface and control electronics

The system controller main memory directs . . .

Page formatting

System control

FSL/JSL compilation

System diagnostics

The interface and control electronics handle controller-to-device communications and control of specific device functions. They provide the necessary interfacing between the input/output (I/O)

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

Imaging subsystem

Xerographic subsystem

Output subsystem

XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

HARDWARE COMPONENTS circuits and the device circuits. They also accept control orders from the system controller and exercise the indicated functional control over the devices. The control and interface electronics communicate device status to the computer software.

The imaging subsystem accepts a formatted page of data on which forms and graphics are merged for the xerographic process. This subsystem converts a character from a digitized form into a printed image composed of tiny dots. These dots are so small and close together that they appear to form solid black areas. Image clarity is determined largely by the resolution or the number of dots per inch (dpi) printed. The resolution of the 4050/4450/4090 LPS is 300 by 300 dpi. The resolution of the

4650 LPS is 300 or 600 dpi.

The xerographic subsystem incorporates all of the typical functions of the xerographic printer, including paper handling and development of the latent image for the output page. The latent image is subsequently developed by applying dry ink and transferring it to a sheet of paper. The final image is fixed when the paper passes through a fusing station on its way to the output stacker. The photoreceptor belt is cleaned and recharged in preparation for the next cycle of operation.

Alternate feeder trays

When all feeder trays contain the same type of paper, you can print continuously by programming the printer to feed from alternate feeder trays. You can also fill any tray with different colored paper or with a different weight of paper.

Simplex printing

When you print on one side of the paper (simplex), the system obtains an individual sheet of paper from a feeder tray, passes it over a transfer station, through the fuser station where the image is fixed, and routes it to the output subsystem.

Duplex printing

When you print on both sides of the paper (duplex), the front side of the sheet prints before the back side. After the system prints on the front side, the system turns the sheet over and reroutes it through the xerographic subsystem for printing on the back side. When the system completes the process on the back side of the page, the system routes the sheet to the output subsystem.

The output subsystem provides paper stacking, report collating, optional finishing, and sample print capabilities.

2-13

HARDWARE COMPONENTS

The LPS offers two output configurations: the dual stacker and the stitcher/stacker. Each configuration has a paper transport mechanism to allow paper handling. Each configuration can also offset an output set approximately 0.5 inch from the previous set.

Samples are delivered to a sample tray. Sample pages can include printouts of information stored in the system, a duplicate copy of the current output page, or a sample of the next page the system will print. This sample print feature allows you to examine job pages. When a sheet is delivered to the sample tray, the system reprints the sample sheet and delivers it to the active stacker tray, thus maintaining the integrity of the output set.

Note: You should always route transparencies to the sample output tray.

The 4050/4450/4650 LPS delivers output at a rate of up to 50

PPM, and the 4090 delivers output at a rate of up to 92 PPM for the first copy of a report, depending on the processing features you use and the density of the page. Subsequent copies of a report do not require input processing time except when you use copy-sensitive processing. The output rate increases for subsequent copies when any of the following occurs:

• All required forms and fonts remain in memory for the duration of the job.

Entire job runs in either simplex or duplex mode.

No copy-sensitive processing.

System can hold the entire print file for the report on disk.

No hardware errors or system recoveries occur.

Graphic image size is three-quarters of a megabit or less on a page-to-page basis.

When printing in duplex mode, printing throughput is reduced when form and font memory cannot accommodate all the forms and fonts used.

2-14 XEROX 4050/4090/4450/4650 LPS PRODUCT REFERENCE

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