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Ricoh
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prt450
SPECIFICATIONS
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Technical Bulletin
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Ricoh prt450 SPECIFICATIONS

NAD PRINTER CONTROLLER
(Codes: A850)
30 October 1998 INTRODUCTION

1. OVERALL MACHINE INFORMATION

1.1 INTRODUCTION

The printer supports the PCL6, and PostScript level 3. PostScript language support is an optional function.
Host printer data can be received via the standard parallel port or the optional Network Interface Board (NIB). The parallel port supports bi-directional Command and Status feed back communication with the host machines.
An optional IDE hard disk drive provides font download, macro download, and other functions.
Additional DRAM SIMMs can be installed to boost the printer performance. Images can be rasterized at 300, 400, or 600 dpi in the controller but printed at 400
or 600 dpi. For 300 dpi printing, the 300 dpi data from the controller is simulated in the base engine by printing the same pixel twice and the same line twice at 600 dpi.
The NAD30S and NAD30 engines can print 35 pages per minute at both 400 and 600 dpi. On the other hand, the NAD40 engine can print 45 pages per minute at both 400 and 600 dpi.
Overall
Information
1-1
SPECIFICATIONS 30 October 1998

1.2 SPECIFICATIONS

Resolution: 600 x 600 dpi
400 x 400 dpi (available when the PostScript option is installed)
300 x 300 dpi (simulated by doubling pixel width and
height at 600 dpi resolution) Gray Scale: 256 levels Printing Speed: 35 ppm (NAD30S and NAD30)
45 ppm (NAD40) Printing Emulation: Main Controller Board: PCL5e and PCL6
Optional PS Board: PostScript Level 3 Printer Font: 45 scaleable typefaces in 14 typeface families
(35 Intellifont and 10 TrueType format fonts)
6 bitmapped typefaces in the Line Printer typeface family Printer Interface: Bi-directional Parallel x 1 (Standard)
Network Interface x 1 (Option)
Ethernet (100 base-TX/10 base-T for TCP/IP, IPX/SPX, EtherTalk)
DRAM Capacity: 8 MB (Standard)
2 DRAM SIMM slots (up to 64 MB)
Maximum Total: Up to 72 MB

1.3 SOFTWARE

1.3.1 PRINTER DRIVERS

The following printer drivers are enclosed in the printer manual/driver kit
•
PCL5e Printer Driver for Windows 3.1/95/98/NT
•
PCL6 Printer Driver for Windows 3.1/95/98/NT
•
PS3 Printer Driver for Windows 3.1/95/98/NT and Macintosh

1.3.2 NETWORK UTILITIES

The network utilities are enclosed in the Network Interface Board option. Refer to the NIB manual for details.
1-2
30 October 1998 MACHINE CONFIGURATION

1.4 MACHINE CONFIGURATION

4
3
2
5
Overall
Information
6
7
1
A850V500.WMF
Item Machine Code No.
Printer Controller A850 3 PostScript Kit A854 7 Hard Disk A853 4 Network Interface Board A855 5 Mailbox G909 1 Mailbox Bridge Unit G912 2 RAM SIMM --- 6
Printer Manual/Driver Kit A867 ---
Relationship between Main Machine, Mailbox, and Finisher
O: Available X: Not available
Model Mailbox 1,000 sheet Finisher 3,000 sheet Finisher
NAD30S/30
NAD40
Installed X X Not installed O X Installed X O Not installed O O
1-3
STRUCTURE 30 October 1998

1.5 STRUCTURE

1.5.1 BLOCK DIAGRAM

Hard Disk
PS Kit
DRAM
SIMM
Network
Interface
Board
Printer
Controller
MB BICU
: Printer's Options
A850V501.WMF
1-4
30 October 1998 STRUCTURE

1.5.2 DESCRIPTIONS

1. Printer Controller
The printer controller handles the following functions:
•
Printer host interface
•
Printing functions
•
Interface and control of additional controller options (HDD, PS kit, DRAM SIMM,
and network interface board)
2. Hard Disk (option)
This HDD stores the additional soft fonts and macros (both PCL and PS fonts).
3. PS Kit (option)
This is to add the PostScript level 3 feature.
Overall
Information
4. Network Interface Board (option)
The network interface board is an additional printer interface to allow the printer to be used on a network.
5. DRAM SIMM (option)
There are two DRAM SIMM slots. This is used for an additional printer processing memory area. 8, 16, or 32 Mbyte standard SIMM modules can be installed. As a result, up to 72 Mbytes of RAM are installable (8 Mbytes on board plus 64 Mbytes of optional SIMM).
6. MB (Mother Board)
This connects the controller to the BICU board in the base machine.
1-5
30 October 1998 HARDWARE OVERVIEW

2. DETAILED SECTION DESCRIPTIONS

2.1 HARDWARE OVERVIEW

Flash ROM
CPU
DRAM Bus
DRAM SIMM
DRAM SIMM
NVRAM
ROM & I/O Bus
CPU Bus
DRAM
PC/AT Compatible
via Parallel Port
Flash Memory
Card I/F
Co-
Processor
Mother Board
EIDE Disk
Interface
NIB
Interface
Printer Controller
BICU
HDD
Network
Interface
Board
A850D500.WMF
The above block diagram shows the major components of the printer controller. The main features of the controller are as follows.
Detailed
Descriptions
1. CPU
An IBM PPC603 processor is used. A 33 MHz oscillator is used as the clock source for both this CPU and the coprocessor.
2. Co-processor
This performs the following functions.
•
ROM control
•
I/O control
•
DRAM control
•
Printer video interface
•
Printer communication interface
•
IEEE 1284 compliant bi - dir ectional par all el port interface
•
Interrupt control
2-1
HARDWARE OVERVIEW 30 October 1998
3. ROM memory
1) Flash ROM (4 Mbytes)
This flash ROM includes boot code, operation system code, PCL5e codes, PCL6 code, and font data for both PCL languages (resident fonts).
2) ROM SIMM (4 Mbytes for the PostScript option)
This ROM SIMM includes the PostScript code and PostScript font data.
4. NVRAM (8 Kbytes)
This NVRAM contains the printer settings, job record data, and error record data.
5. Network Interface Board Interface
This controls the optional network interface board, and printer MIB is provided to support the network operations.
6. Hard Disk Drive Interface (Enhanced IDE)
This HDD interface is provided to support storage of fonts and macros downloaded from a PC.
7. Flash Memory Card Interface
The flash memory card for updating the controller and PostScript firmware is connected to this flash memory card slot.
8. Power-on Self Diagnostic
When the controller is turne d on, the controller performs a self diagnostic test.
2-2
30 October 1998 IMAGE PRINTING

2.2 IMAGE PRINTING

Parallel Interface, from PC
Printer Controller
NIB
Parallel
Buffer
CPU
Resident
RAM
LD Unit
GAVD
FCI
Co-processor
Intelligent
Personality
Selection
BICU
PCL-5e
Co-processor
IPU
GA1
PCL-6
Post
script
DRAM SIMM
MSU
Resident
RAM
Image Data
Generation
NIB
HDD
A850D502.WMF
Base EnginePrinter Controller
MSU
BICU
IPU LD
Detailed
Descriptions
HDD
DRAM
SIMM
A850D503.WMF
The printer controller receives the print data from the computer through the parallel or network interface port. The co-processor handles the image data but it only makes a raster image. All image processing, such as edge smoothing and toner saving, are done in the base engine.
The image data from a PC goes to the buffer in the resident RAM. Then, it goes to the co-processor. The co-processor selects the printer language automatically, then the co-processor generates the print data to match the selected printer language. After generating the print data, the co-processor sends it to the LD unit through the IPU on the BICU board. At that time, the data is also sent to the hard disk for multiple printing and sorting, as well as backup in case of paper jams.
2-3
IMAGE DATA PROCESSING 30 October 1998

2.3 IMAGE DATA PROCESSING

The FCI in the LD unit is responsible for edge smoothing and toner saving functions.
The edge smoothing and toner saving modes can be switched on or off using the printer user tool or the printer driver.

2.3.1 EDGE SMOOTHING

A850D504.WMF
Usually, binary picture processing generates jagged edge on characters as shown in the above left illustration. The FCI reduces the edges of characters using edge smoothing.
Whether or not the object pixel undergoes smoothing depends on the surrounding image data. Smoothing for the object pixel is done by changing the laser pulse position.

2.3.2 TONER SAVING MODE

Toner saving is done by reducing the number of black dots printed, not by varying the development bias. In toner saving mode, the image data is filtered through a matrix.
As a result of passing through the filter, less toner is used to create the latent image on the drum, and black areas print as gray.
2-4
30 October 1998 FEATURES

2.4 FEATURES

2.4.1 SORTING

If “Collate” is turned on and a multicopy job is printed, the first copy of the job will be printed directly. At the same time, the image data for the copy job is stored in the hard disk of the main machine. When the main machine prints the next copy, the next copy will be printed from the hard disk.
If the finisher is not installed, the rotate sort feature can be used. The image is rotated by the MSU, in the same way as image rotation for the copier.

2.4.2 DUPLEX PRINTING

Duplex printing is available with all output bin options but not all paper sizes (refer to the specifications section of the copier manual). If a job specifies duplex but the paper size to be used is not usable in the duplex unit, the job will be printed simplex.
Duplex printing is available in two binding methods: Short-edge binding and Long­edge binding.
In short-edge binding, when printing the second side of a page, the image may require rotation. The image is rotated by the co-processor in the printer controller.
The co-processor corrects the image printing order for duplexing as follows.
•
Larger than A4 lengthwise/LT lengthwise (example 8 pages)
2nd page – 1st page – 4th page – 3rd page – 6th page – 5th page – 8th page – 7th page
Detailed
Descriptions
•
Up to A4 lengthwise/LT lengthwise (example 8 pages)
2nd page – 4th page – 1st page – 6th page – 3rd page – 8th page – 5th page – 7th page
2-5
FEATURES 30 October 1998

2.4.3 STAPLING

Stapling is only available when the 3000-sheet finisher or 1000-sheet finisher is installed.
The finishers have the following stapling positions.
1) Upper left, diagonal
2) Upper right, diagonal
3) Left, two staples
4) Top, two staples
5) Right, two staples
6) Upper left, horizontal
7) Upper right, horizontal
8) Upper left, vertical
9) Upper right, vertical
NOTE:
Depending on the paper orientation, the image may have to be rotated. This image rotation is done by the co-processor in the printer controller.
There is a limit for the number of sheets which can be stapled by each finisher. If a job that specifies stapling ha s more than this number of sheets, it will not be stapled.
With the 1000-sheet finisher, only stapling positions 1) and 2) are available.

2.4.4 PUNCHING

Punching is only available when the punch unit is installed with the 3000-sheet finisher. The number of holes depends on the type of punching unit. The punching unit has only one available position, so the relationship between the punching position and the printed image depends on the paper feeding orientation and imaging. The punching positions are defined as follows.
1) Left
2) Top
3) Right
2-6
30 October 1998 FEATURES

2.4.5 JAM RECOVERY

If the jam recovery feature is on and a paper jam occurs, the controller will reprint all pages for which a feed-out indication has not been received from the main machine. In usual cases, all image data from the controller will be sent to the hard disk on the main machine, When a jam occurs, the recovery data will be sent from the hard disk on the main machine.

2.4.6 AUTO TRAY SELECT

When “Auto Select” is selected with the printer driver, th e printer searches for a tray that contains the specified size of normal plain paper. The search starts from the LCT, and when a tray that contains the specified size of paper is found, the printer starts printing and feeds paper from that tray. The search sequence is as follows.
LCT – 1st tray – 2nd tray – 3rd tray – 4th tray – LCT
Detailed
Descriptions
The default setting for the current tray is LCT. If the LCT is not installed, the default is the 1st tray.

2.4.7 POWER ON SELF DIAGNOSTICS

When the controller is turne d on, it performs a self diagnostic sequence of tests automatically. If any errors were de tected, an error message will be displayed on the operation panel.
Test Items
Devices always tested
•
Co-processor
•
Flash ROM
•
Resident RAM
•
NVRAM
•
Engine I/F
Devices tested when they are installed
•
DRAM SIMM
•
PS DIMM I/F
•
HDD I/F
•
Network interface board I/F
2-7
HARD DISK 30 October 1998

2.5 HARD DISK

Two hard disks are used for the printer functions. One is connected to the printer controller (Printer HDD). The o ther is in the main machine (Engine HDD).

2.5.1 PRINTER HDD

When the main power switch is turned on after the printer HDD is installed, the machine asks you to format the hard disk.
If you press the “Yes” button, the machine formats the hard disk. At this time, two partitions will be made on the ha rd disk. One is for PCL and the other is for PostScript (fonts and macros only).
If you press the “Ignore” button, the machine determines that there is no optional printer hard disk.

2.5.2 ENGINE HDD

The hard disk in the main machine is used for both copy and printer functions. Therefore, the hard disk has three partitions: for copier, printer, and archive files (one of the copier features). The sizes of the partitions depends on the setting of “User Tools – 1. System – No.23, Memory Priority”, as shown below.
Priority:
0 MB
Copy
(Default)
Copier
828MB
Printer
92MB
Printer
Copier
438MB
Printer
482MB
1136 MB
Archive Files
216MB
2-8
Archive Files
216MB
A850D505.WMF
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