Toshiba B-EV4 TABLE OF CONTENTS

EO18-33025

(Revision Date: Mar. 27, 2009)

TABLE OF CONTENTS

Page

1. OUTLINE-------------------------------------------------------------------------------------------------------------1- 1

1.1 Features of the B-EV4D/EV4T--------------------------------------------------------------------------1- 1

1.1.1 Front View------------------------------------------------------------------------------------------1- 1

1.1.2 Rear View------------------------------------------------------------------------------------------ 1- 1

1.1.3 Interior View----------------------------------------------------------------------------------------1- 2

1.2 Indications of the Model Name -------------------------------------------------------------------------1- 4

1.3 Basic Specifications ---------------------------------------------------------------------------------------1- 5

1.4 Key and LED ------------------------------------------------------------------------------------------------1- 8

1.5 Supply Specifications -------------------------------------------------------------------------------------1- 9

1.5.1 Media Type-----------------------------------------------------------------------------------------1- 9

1.5.2 Detection Area of the Transmissive Sensor ----------------------------------------------1-10

1.5.3 Detection Area of the Reflective Sensor--------------------------------------------------- 1-10

1.5.4 Ribbon---------------------------------------------------------------------------------------------- 1-11

2. ELECTRONIC SPECIFICATIONS ---------------------------------------------------------------------------- 2- 1

2.1 Block Diagram ----------------------------------------------------------------------------------------------2- 1

2.2 Main PC Board Layout------------------------------------------------------------------------------------2- 2

2.3 Description of the MAIN PC Board --------------------------------------------------------------------2- 3

3. REPLACING THE IMPORTANT PARTS ------------------------------------------------------------------- 3- 1

3.1 Replacing the Top Cover---------------------------------------------------------------------------------3- 2

3.1.1 B-EV4T model------------------------------------------------------------------------------------- 3- 2

3.1.2 B-EV4D model ------------------------------------------------------------------------------------3 -3

3.2 Replacing the Lower Cover------------------------------------------------------------------------------3- 6

3.3 Replacing the Main PC Board --------------------------------------------------------------------------3- 7

3.4 Replacing the Platen Ass’y ------------------------------------------------------------------------------3- 9

3.5 Replacing the Print Head Ass’y------------------------------------------------------------------------3-10

3.5.1 B-EV4T model------------------------------------------------------------------------------------ 3-10

3.5.2 B-EV4D model -----------------------------------------------------------------------------------3-12

3.6 Replacing the Stepping Motor -------------------------------------------------------------------------3-15

3.7 Replacing the Gear Cover ------------------------------------------------------------------------------3-17

3.8 Replacing the Feed Button PC Board----------------------------------------------------------------3-19

3.9 Replacing the Cover Open Sensor -------------------------------------------------------------------3-20

3.10 Replacing the Ribbon Sensor-------------------------------------------------------------------------- 3-21

3.11 Replacing the Black Mark Sensor--------------------------------------------------------------------- 3-22

3.12 Replacing the Feed Gap Sensor (Lower) -----------------------------------------------------------3-24

3.13 Replacing the Feed Gap Sensor (Upper) -----------------------------------------------------------3-26

4. TROUBLESHOOTING -------------------------------------------------------------------------------------------4- 1

4.1 LED Status--------------------------------------------------------------------------------------------------- 4- 1

4.2 Print Quality--------------------------------------------------------------------------------------------------4- 2

5. MAINTENANCE----------------------------------------------------------------------------------------------------5- 1

6. FIRMWARE DOWNLOAD MODE----------------------------------------------------------------------------- 6- 1

CAUTION!

1. This manual may not be copied in whole or in part without prior written permission of TOSHIBA

TEC.

2. The contents of this manual may be changed without notification.

by TOSHIBA TEC CORPORATION

ll Rights Reserved

570 Ohito, Izunokuni-shi, Shizuoka-ken, JAPAN