Toshiba B-SV4T SERIES - Fundamental of the System; Specifications; Electronics; MCU Circuit and MCU PIN Description

TABLE OF CONTENTS
Page
1. FUNDAMENTAL OF THE SYSTEM---------------------------------------------------------------------------1-1
1.1 Overview ------------------------------------------------------------------------------------------------------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 in Model No.-----------------------------------------------------------------------------------1-2
1.3 Specifications ------------------------------------------------------------------------------------------------1-3
1.3.1 Printer---------------------------------------------------------------------------------------------------1-3
1.4 Supply Specifications --------------------------------------------------------------------------------------1-4
1.4.1 Media -------------------------------------------------------------------------------------------------1-4
1.4.2 Ribbon Sizes and Shapes Specifications ---------------------------------------------------1-8
2. ELECTRONICS -----------------------------------------------------------------------------------------------------2-1
2.1 Circuit Description-------------------------------------------------------------------------------------------2-1
2.2 MCU Circuit and MCU PIN Description----------------------------------------------------------------2-3
2.2.1 MCU PIN Description-------------------------------------------------------------------------------2-4
2.3 Reset Circuit--------------------------------------------------------------------------------------------------2-9
2.4 Memory Circuit--------------------------------------------------------------------------------------------- 2-10
2.5 Decoder Circuit -------------------------------------------------------------------------------------------- 2-11
2.6 Memory Map ----------------------------------------------------------------------------------------------- 2-12
2.7 Print Head Circuit -----------------------------------------------------------------------------------------2-13
2.8 Stepping Motor Driver/Protection Circuit ------------------------------------------------------------ 2-14
2.9 Power Circuit ----------------------------------------------------------------------------------------------- 2-16
2.10 Parallel Interface Circuit --------------------------------------------------------------------------------- 2-17
2.11 Serial Interface Circuit -----------------------------------------------------------------------------------2-19
2.12 USB Circuit -------------------------------------------------------------------------------------------------2-20
2.12.1 USB PIN Function-------------------------------------------------------------------------------2-21
2.13 Sensor Circuit ---------------------------------------------------------------------------------------------- 2-23
2.13.1 Feed Gap and Black Mark Sensor ---------------------------------------------------------- 2-23
2.13.2 Head Open Micro Switch ---------------------------------------------------------------------- 2-24
2.13.3 Strip Sensor--------------------------------------------------------------------------------------- 2-25
2.13.4 Ribbon Sensor ----------------------------------------------------------------------------------- 2-26
2.14 Cutter Drive/Protection Circuit ------------------------------------------------------------------------- 2-27
2.15 DC Motor Driver/Encoder Circuit---------------------------------------------------------------------- 2-28
3. REPLACING THE IMPORTANT PARTS --------------------------------------------------------------------3-1
3.1 Replacing the Top Cover Ass’y--------------------------------------------------------------------------3-2
3.2 Replacing the Lower Inner Cover -----------------------------------------------------------------------3-4
3.3 Replacing the Lower Cover Ass’y----------------------------------------------------------------------3-5
3.4 Replacing the Main PCB Ass’y --------------------------------------------------------------------------3-5
3.5 Replacing the Platen Ass’y -------------------------------------------------------------------------------3-7
3.6 Replacing the Stepping Motor Bracket/Metal Assembly and Stepping Motor ---------------3-8