File name Epson DLQ-3000 (upgrade model) Service Manual.pdf

EPSON IMPACT DOT PRINTER DLQ-3000 (upgrade model) SERVICE MANUAL EPSON 4006094 PREFACE This document provides supplementary information to describe the new DLQ-3000 (Minerva+), which is a follow-on version of the DLQ-3000 (Minerva). Therefore, you must refer to this information in conjunction with DLQ-3000 (Minerva) Service Manual for details on any subjects common to both printers. -i- REVISION SHEET Revision A Issue Date March 15, 1996 Revision Page 1st issue -ii- DLQ-3000 (MINERVA+) Product Description 1.1 FEATURES Minerva+ is a 24-pin serial dot-matrix and flat-bed type impact printer. As this printer follows on DLQ-3000 (MINERVA+), the main future is almost same as DLQ-3000 (MINERVA). The main features are ; t Two built-in and one optional I/F Bi-Directional Parallel Interface (IEEE-1284 nibble mode) Serial Interface Type-B Interface (Option) The exterior view of DLQ-3000 (MINERVA+) is the same as DLQ-3000 (MINERVA). Rev.A 1-1 Product Description DLQ-3000 (MINERVA+) 1.2 INTERFACE OVERVIEW The printer provides an 8-bit Bi-directional parallel interface and serial interface as standard. Moreover, it is possible to interface to various computers using the optional type-B interface board. This section describes the specifications of the standard interfaces. 1.2.1 Parallel Interface Specifications 1.2.1.1 Forward Channel Transmission mode: Synchronization: Handshaking: Signal level: Adaptable connector: Data transmission timing: 8-bit parallel, IEEE-1284 compatible mode By STROBE pulse By BUSY and ACKNLG signal TTL-compatible level, IEEE-1284 level 1 device 57-30360 (Amphenol) or equivalent See Figure 1-1. Note: Transition time (rise time and fall time) of every input signal must be less than 200 ns and every output signal must be less than 120 ns. The BUSY signal is at a HIGH level before either -ERROR signal is at a LOW level or the PE signal is at a HIGH level until all these signals return to their inactive state. The BUSY signal is at a HIGH level in the following cases: During data reception (see the figure above) When the input buffer is full When the INIT input signal is active During initialization When the ERROR signal is active In the self-test mode In the SelecType When the parallel interface is not selected. The ERROR signal is at a LOW level when the printer is in one of the following conditions: Printer hardware error (fatal error) A paper-out error Release lever operation error PE signal is at a HIGH level during paper out error. D ATA DATA (n) DATA (n+1) -STORBE 500 ns (min.) 500 ns (min.) 500 ns (min.) 0 (min.) B US Y -ACKNLG 0 (min.) 500 ns (max.) 0 (min.) 500 ns ~10 µs Figure 1-1. Data Transmission Timing 1-2 Rev.A DLQ-3000 (MINERVA+) Product Description Table 1-1 shows the connector pin assignments and signal functions for the 8-bit parallel interface. Table 1-1. Signal and Connector Pin Assignments for Parallel Interface (Forward Channel) Pin No. 1 Signal Name STROBE Return GND Pin 19 I

File name Epson DLQ-3000 Service Manual.pdf

EPSON TERM NAL PR NTER DLQ"3000 SERVICE MANUAL EPSON NOTICE All rights reserved. Reproduction of any part of this manual in any form whatsoever without SEIKO EPSON's express written permission is forbidden. The contents of this manual are subjects to change without notice. All efforts have been made toerwuretheaccuracyof the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequence thereof. Epson and Epson ESC/P are registered trademark of Seiko Epson Corporation. General Notice: Other product names used herein are for identication purposes only and maybe trademarks of their respective campanies. @Copyright 1994 by SEIKO EPSON CORPORATION Nagano, Japan PRECAUTIONS Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage to equipment. DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by DANGER Headings. WARNING Signals a precaution which, if ignored, could result in damage to equipment. The precautionary measures itemized below should always be observed when performing repair/ maintenance procedures. DANGER 1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. 2. 3. 1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICS OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY. 2. 3. 4. 5. PREFACE This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of DLQ-3000. The instructions and procedures included herein are intended for the exp