Ricoh ap204 Service Manual pom c

POMELO (G033)

SERVICE MANUAL

[Controller]

øIMPORTANT SAFETY NOTICES

PHYSICAL INJURY PREVENTION

1.Before disassembling or assembling parts of the printer and peripherals, make sure that the power cord is unplugged.

2.The wall outlet should be near the printer and easily accessible.

3.Note that some printer components are supplied with electrical voltage even if the main switch is turned off.

4.If an adjustment or operation check must be made requiring the removal or opening of the exterior covers while the main switch is on, keep hands away from electrified or mechanically driven components.

5.The printer drives some of its components when it completes the warm-up period. Keep hands away from mechanical and electrical components when the printer starts operation.

6.The interior and metal parts for the fusing unit become extremely hot while the printer is operating. Do NOT touch these components with bare hands.

HEALTH SAFETY CONDITIONS

1.Never operate the printer without ozone filters installed.

2.Always replace the ozone filters with the specified replacement at the specified maintenance intervals.

3.Toner is non-toxic, but if it gets in your eyes by accident, it may cause temporary eye discomfort. Remove it with eye drops or flush eyes with water. If this is unsuccessful, get medical attention immediately.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL

1.Do NOT incinerate toner cartridges or used toner. Toner dust may ignite suddenly when exposed to an open flame.

2.Dispose of used toner and belt cartridge in accordance with local regulations. (These are non-toxic supplies.)

3.Dispose of replaced parts in accordance with local regulations.

Trademarks

Microsoft, Windows 98/95/3.1x, and Windows NT 4.0 are registered trademarks of Microsoft Corporation.

Macintosh and AppleTalk are registered trademarks of Apple Computer, Inc.

NetWare is a registered trademark of Novell, Inc.

Ethernet is a registered trademark of Xerox Corporation.

General Notice:

Other product names used herein are for identification purposes only and may be trademarks of their respective companies. We disclaim any and all rights in those marks.

25 December, 1998

OVERALL MACHINE INFORMATION

1. OVERALL MACHINE INFORMATION

1.1 SPECIFICATIONS

Page Description	IPDL-C
Language	Ricoh-Script 2 (Option)
Printer Driver	IPDL-C: Windows 98/95/3.1x/NT4.0
	Ricoh-Script 2: Windows 98/95/NT4.0, Macintosh (PPD
	for LaserWriter 8)
Resolution	Controller: 600/300 dpi
Color Mode	Color (4 color mode only)/Monochrome (black only)
	Set by the printer driver
Gradation Mode	1 bit/pixel (fixed)
Toner Saving	On/Off (by a printer driver setting)
Color Correction	On/Off (by a printer driver setting)
	Default setting: Enabled
Paper Size	∙ Tray 1
	Standard Tray:
	A4, B5, 81/2"x11", 71/4"x101/2", Custom Size
	(Length: 210 to 297 mm, Width: 100 to 216 mm)
	Optional Legal Tray:
	A4, B5, 81/2"x11", 71/4"x10½", 8 1/2"x14", Custom
	Size (Length: 210 to 356 mm, Width: 100 to 216
	mm)
	∙ Tray 2 (Optional Feed Unit)
	Standard Tray:
	A4, B5, 81/2"x11", 71/4"x101/2"
	Optional Legal Tray:
	A4, B5, 81/2"x11", 71/4"x101/2", 81/2"x14"
Interface	Standard: Bi-directional Parallel (IEEE1284: compatible
	and nibble mode supported)
	Option: Parallel (IEEE1284: only compatible mode
	supported), Ethernet (100Base-TX/10Base-T)
Network Protocol	NetWare, TCP/IP, AppleTalk (with Ricoh-Script 2)
Fonts	IPDL-C: Japanese fonts only - not used
	Ricoh-Script 2: 39 fonts
Memory	Standard: 16 MB
	Optional upgrades: 16 MB SIMM, 32 MB SIMM
SIMM Slot	1 (for optional memory)

Overall Information

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OVERALL MACHINE INFORMATION			25 December, 1998
DIMM Slot	1	(for optional Ricoh-Script 2)
Option Interface	2	(for optional network I/F board and optional parallel
	I/F
Options	16 MB Memory
	32 MB Memory
	Network Interface Board
	IEEE1284 Parallel Interface
	Ricoh-Script 2 Emulation Module

1.2 LAYOUT

G033M058.WMF

1-2

25 December, 1998

DETAILED DESCRIPTIONS

2. DETAILED DESCRIPTIONS

2.1 FUNCTIONAL OVERVIEW

2.1.1 BLOCK DIAGRAM

Controller	Printer Engine		tailed riptions
			e c
Control Block	Printer Hardware		D Des
Host Interface	Synch.	LD Unit
	Detector
Block
Print Image
Generator Block
		MCTL
Engine Interface	Printer Engine Controller
Block
Printer	Operation Panel
		G033C001.WMF

The functions and characteristics of the various blocks in the controller are described below.

Control Block

1.Controls the controller and operation panel.

2.Sustains the settings (system initial setup items, printer settings, etc.) in

NVRAM.

Host Interface Block

1.Receives the print and control data (commands) from the host.

2.The interface settings depend on the controller settings.

3.Can accommodate optional interface boards (one parallel and one network interface).

Print Image Generator Block

1.Converts the data received from the host into a print image and writes this image into the memory (the image conversion method depends on the controller settings).

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DETAILED DESCRIPTIONS

25 December, 1998

Engine Interface Block

1.Sends the image data serially on a 1-bit/pixel basis in synchronization with the sync signal and clock from the engine.

2.Receives status data from the engine and passes it to the controller.

3.Sets up the operating mode for the engine.

2.1.2 PRINT DATA PROCESSING

The diagram below shows the print data processing path. The boxes in the diagram represent function blocks and the text next to the arrows indicates the data type. The diagram is followed by a brief description of color processing by the printer driver.

IPDL-C

Ricoh Script

Application

Application

RGB 8bit

CMYK 8bit

RGB 8bit

CMYK 8bit

GDI

RGB 8bit

Printer Driver

Printer Driver

CMS *

RGB 8bit

CMYK 8bit

RGB 8bit

Controller

Ricoh Script

Controller

(including CMS)

CMYK 1bit

CMYK 1bit

Printer Engine

Printer Engine

* CMS: Color Management System

G033C002.WMF

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25 December, 1998

DETAILED DESCRIPTIONS

CMS (Color Management System)

CMS adjusts the RGB values of the colors in the application data in preparation for

RGB to CMYK conversion, which is done in the controller.

A file known as a ‘profile’ (filename extension ‘prf’) is automatically installed in the \windows\system\ folder during printer driver installation. This file contains instructions for CMS on how to convert the colors in the print data produced by the application.

CMS is used whenever the color correction setting in the printer driver is set to any value other than “Off”.

Color Adjustment by the Driver

The driver adjusts the following parameters in accordance with the driver settings made by the user: Brightness, Contrast, Saturation, and Color Balance.

The driver does not perform RGB to CMYK color conversion.

Color Conversion, Gamma Conversion, and Dithering by the Controller

The controller performs gamma conversion (see Gamma Correction), RGB-to-

CMYK conversion, and dithering.

Detailed Descriptions

2.1.3 GAMMA CORRECTION

Gamma correction in this model has two components: controller gamma (nonadjustable) and service gamma (adjustable).

Controller gamma

This gamma is programmed into the flash ROM in the controller. If there has been no service gamma adjustment in the machine so far since installation, the controller gamma is the only gamma that is used (i.e., service gamma = 0).

Service gamma

This gamma is stored in the NVRAM in the controller. It can be adjusted using controller SP mode (S7. Gamma Calibration). See “6.Replacement and Adjustment

- Service Gamma Adjustment,” for the adjustment procedure.

The controller combines the service gamma (the default setting is zero) with the controller gamma when doing gamma correction.

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DETAILED DESCRIPTIONS

25 December, 1998

2.2 FUNCTIONAL DESCRIPTION

2.2.1 CONTROLLER LAYOUT

DIP SW

C P U

VR4300

FCI

2.5C

IC CARD SLOT

FONT

FONT

R O M

R O M

ASIC

R O C K Y F

NVRAM

OPTION I/F 1

VIDEO I/F

DIMM SLOT

FLASH

OPTION I/F 2

R O M

DRAM

DRAM

DRAM

DRAM

DRAM

DRAM

DRAM

DRAM

FLASH

PARALLEL I/F

R O M

SIMM SLOT

G033C003.WMF

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25 December, 1998

DETAILED DESCRIPTIONS

2.2.2 FUNCTIONS OF COMPONENTS

Device

Description/Function

CPU

∙

VR4300 – 133 MHz

∙

DRAM control

∙

Timeout monitoring

∙

Parallel interface

ASIC ROCKY F

∙

Timer control

∙

I/O port control

∙ Engine interface serial communications control

∙

Image data decompression

∙

Interrupt control

FLASH ROM

∙ For storing programs (2 MB)

∙ Programmable via an IC card.

NVRAM

∙ Stores initial setup settings and printer parameters.

∙ Uses a 2 KB EEPROM.

ASIC FCI2.5C

∙

Toner saving

FONT ROM

∙ Uses two 32-Mbit mask ROMs (8 MB total).

∙ Stores internal printer fonts (Japanese fonts only - not used).

DRAM

∙

Eight 16-Mbit DRAMs are installed as standard (16 MB

total).

1

2

3

4

5

6

7

8

O F F

G033C004.WMF

SW No.

Setting

Purpose

DIP SW

OFF

The controller boots from the flash

ROM on the board (normal setting).

1

The controller boots from the IC card

ON

(when upgrading the controller, NIB,

or Ricoh-Script 2 software).

2 to 8

Always set to OFF. For designers’

use only.

VIDEO I/F

∙

Interfaces the controller with the printer engine.

PARALLEL I/F

∙

Provides an interface that connects to a local host

(IEEE1284 compliant).

Detailed Descriptions

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DETAILED DESCRIPTIONS		25 December, 1998
Device	Description/Function
	∙ Two slots; each can hold either an optional network interface
	or a parallel interface board. You cannot install two boards
OPTION I/F 1,2	of the same type.
	∙ The type of optional board can be identified from the unique
	ID that is built into it.
	∙ A 72-pin slot for accommodating the optional Ricoh-Script 2
DIMM SLOT	emulation module.
	∙ The emulation module is a programmable flash ROM.
	∙ A slot for an optional expansion memory board.
SIMM SLOT	∙ SIMM specifications: 16 MB or 32 MB SIMM, 60 ns access
	speed
IC CARD SLOT	∙ For accommodating an IC card for upgrading the software.

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25 December, 1998

DETAILED DESCRIPTIONS

2.3 POWER-UP SELF-DIAGNOSTICS

2.3.1 OPERATION PANEL DISPLAY DURING POWER-UP SELFDIAGNOSTICS

The controller starts power-up self-diagnostic tests when the printer power is turned on. It shows the test status on the panel as the self-diagnostics proceed.

Immediately after turning the power on

The controller turns on all LEDs and the LCD.

During power-up self-diagnostics

When the controller starts the self-diagnostics, it turns off all LEDs except the Power LED, which it causes to blink. It displays the message “Warming UP” on the first line of the LCD.

If the test terminates normally

If an error is not detected during the self-diagnostic test, the controller turns the blinking Power LED on and turns off all the other LEDs and the LCD. The controller starts the system immediately afterwards.

Detailed Descriptions

If an error is detected

Errors are divided broadly into fatal and non-fatal (user) errors. The controller takes different actions and gives different status information for different types of errors.

See section 7 (Troubleshooting) for tables of the different types of errors.

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DETAILED DESCRIPTIONS

25 December, 1998

Non-fatal error (user error) detected

The controller causes the blinking Power LED to stay on, turns off all of the other

LEDs and the LCD, and restores the standby display state. Since non-fatal errors do not adversely affect any print operation, the controller starts the system immediately after it takes these actions.

The system turns on the Error LED and prints out a list of settings with error descriptions, in monochrome mode (see section 7, Troubleshooting – Controller

User Errors for the error codes).

After printing the above list of settings, the system returns to the normal state and enables all devices except the failed device.

Fatal error detected

Since there is no guarantee that the system can generate a list of settings when the error detected is fatal, the system turns off the Power LED and turns on the Error LED. At the same time, it displays and keeps an error message on the LCD until the power is turned off.

The first line of the LCD contains a 4-digit code that identifies the error. (see section 7, Troubleshooting – Controller Self-diagnostics Errors for a description of the error codes).

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	25 December, 1998		DETAILED DESCRIPTIONS
	2.4 POWER-UP SELF-DIAGNOSTICS FLOW CHART
		Turn on power
				Fatal Error
	Code ROM sum check	Test Code ROM		Detected
				Fatal Error
	Tests the timer functions	Test Timer		Detected
	of the ROCKY F ASIC			Fatal Error
	Operation check			Detected
		Test CPU
				Fatal Error
	Tests the engine interface	Test ASIC		Detected
	functions of the ROCKY F ASIC			Fatal Error
	Font ROM sum check			Detected
		Test Font ROM

Detailed Descriptions

IC card sum check, if IC card is installed

IC card installed?	N O	Display Error on
		Panel
YES
Test IC card

	DIMM Installed?				N O
			YES
DIMM (emulation module)
sum check, if DIMM is	Test DIMM
installed
					N O
	Non-fatal Error
	(user error)?
			YES
	Start System
	Generate List of						Start System
	Settings
							G033M057.WMF

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25 December, 1998

INSTALLATION

3. INSTALLATION

Refer to the following materials.

∙For the printer: Quick Installation Guide

∙For options: Operating Instructions

Installation

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25 December 1998

25 December, 1998

4. SERVICE TABLES

4.1 SP MODES

4.1.1 OVERVIEW

The printer has two types of SP modes:

1.Engine SP modes

2.Controller SP modes

This manual deals with controller SP modes.

4.1.2 ENGINE SP MODE

Refer to the service manual for the engine for how enter engine SP mode and use the engine SP modes.

4.1.3 CONTROLLER SP MODE

Entering and Exiting Controller SP Mode

			[A]	[A]
Power	On Line	Data in
		Reset	[B]	[B]

Error

M e n u E s c a p e

Media	#
	# Enter

G033V001.WMF

G033V000.WMF

To enter controller SP mode: Turn on the printer while holding down the [On Line] [A] and [Reset] [B] keys on the operator panel. Hold the keys down until all of the LEDs and the LCD turn on.

To exit controller SP mode: Turn off the unit.

NOTE: Be sure to exit from SP mode when you are finished.

Service Tables

4-1