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Hitachi IJ PH User Manual

Hitachi IJ PH
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Service Manual
HITACHI Printer
Model PH
Revision Aug. 2011
Version First edition

Table of Contents

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Hitachi IJ PH Specifications

General IconGeneral
BrandHitachi
ModelIJ PH
CategoryPrinter
LanguageEnglish

Summary

Introduction

Safety Precautions

Essential safety guidelines and warnings for operating the printer.

Structure of Main Body Components

Overview and external views of the printer's main components.

Printer Installation Procedures

Procedures for installing the printer, including power supply wiring.

Maintenance Work

Setting Maintenance Mode

Instructions for accessing and configuring the service personnel maintenance mode.

System Environment Setup

Configuring printer settings like ink type, nozzle size, and temperature.

Adjustment and Operational Checkout

Procedures for adjusting excitation, charging voltage, and phase gain.

Solenoid Valve and Pump Testing

Testing the functionality of solenoid valves and the pump.

Program Download and Updates

Procedure for upgrading the printer's software via a memory card.

Viscometer Calibration and Testing

Calibrating and testing the viscometer for ink viscosity measurement.

Ink Concentration Control

Selecting ink concentration control based on viscosity or dot count.

System Reset and Data Backup

Resetting system defaults and backing up printer data to a memory card.

Unit Information and Error Handling

Viewing unit details and managing product speed matching errors.

Language Registration and Fault Management

Registering screen languages and managing fault/warning log codes.

Software Options and Rescue Memory Card

Setting up software options and using the rescue memory card.

Maintenance of Controlling Part

Controlling Part Construction Overview

Overview of the controlling part, including controller and engine sections.

Controller Part Components and Replacement

Details on EZJ124 board, battery, power supply, and control panel.

Front Panel and LCD Assembly Replacement

Procedures for replacing the front panel and LCD assemblies.

Engine Part Components and Procedures

Details on EZJ93, EZJ106, EZJ95, EZJ99 boards, power supplies, and fan/filter replacement.

Maintenance of Circulation System

Circulation System Structure and Access

Overview of the circulation system and how to access its parts.

Ink Tank and Valve Replacement Procedures

Procedures for replacing the main ink tank and solenoid valves.

Pressure Valve and Joint Handling Procedures

Replacing the pressure reducing valve and handling ICU/Filter joints.

Pump, Sensor, and Circulation Unit Replacement

Procedures for replacing pump units, pressure sensors, and circulation units.

Viscometer Troubleshooting and Replacement

Troubleshooting viscometer faults and procedures for replacement.

Print Head and Related Procedures

Procedures for replacing the print head and associated components.

Troubleshooting Circulation Route Issues

Diagnosing and repairing issues like dry circulation routes or pump malfunctions.

Print Head-Related Maintenance

Print Head Structure and Cover Removal

Overview of the print head structure and steps to remove covers.

Nozzle and Deflecting Base Replacement

Procedures for replacing nozzles and the deflecting base.

Cover Switch and Sealing Valve Replacement

Procedures for replacing the cover switch and sealing valve (MV9).

Heating Unit and Gutter Base Replacement

Procedures for replacing the heating unit and gutter base group.

Head Base and APH Sensor Board Replacement

Procedures for replacing the head base and the APH sensor board (EZJ98).

Troubleshooting

Troubleshooting Lists and Ink-Stop Faults

Comprehensive list of faults and detailed troubleshooting for ink-stop type errors.

Print-Stop Faults and Warning Conditions

Troubleshooting for print-stop faults and handling warning conditions.

No On-Screen Indications and Miscellaneous Faults

Troubleshooting steps for chipped prints, disordered characters, and other display issues.

Attached Drawings

Circulation System Diagram

Schematic diagram of the printer's circulation system.

Electrical Connection Diagram

Wiring diagram illustrating electrical connections within the printer.

Circulation Sequence Tables

Tables detailing the sequence of operations for various circulation states.

Excitation Curve Data Tables

Tables showing excitation voltage settings based on ink type and temperature.

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