Brother P-touch BB4 User manual

SERVICE MANUAL
MODEL: P-touch BB4

SERVICE MANUAL
MODEL: P-touch BB4

© Copyright Brother 2001
All rights reserved.
No part of this publication may be reproduced in any
form or by any means without permission in writing
from the publisher.
Specifications are subject to change without notice.

PREFACE
This publication is a service manual covering the specifications, theory of operation,
disassembly/reassembly procedure, and troubleshooting of the Brother P-touch BB4. It
is intended for service personnel and other concerned persons to accurately and
quickly provide after-sale service for our P-touch BB4.
To perform appropriate maintenance so that the machine is always in best condition
for the customer, the service personnel must adequately understand and apply this
manual.
This manual is made up of four chapters and appendix.
CHAPTER ISPECIFICATIONS
CHAPTER II MECHANISMS
CHAPTER III ELECTRONICS
CHAPTER IV TROUBLESHOOTING
APPENDIX CIRCUIT DIAGRAM

Chapter I.
SPECIFICATIONS

CONTENTS
CHAPTER I. SPECIFICATIONS
1.1 MECHANICAL SPECIFICATIONS........................................................................................ I-1
1.1.1 External Appearance................................................................................................ I-1
1.1.2 Entry system ............................................................................................................ I-1
1.1.3 Display ..................................................................................................................... I-1
1.1.4 Printing Mechanism.................................................................................................. I-2
1.1.5 Tape Cassette.......................................................................................................... I-2
1.1.6 Tape Cutter.............................................................................................................. I-2
1.2 ELECTRONICS SPECIFICATIONS...................................................................................... I-5
1.2.1 Character Generator ................................................................................................ I-5
1.2.2 Power Supply........................................................................................................... I-5

I- 1
1.1 MECHANICAL SPECIFICATIONS
1.1.1 External Appearance
Figure 1.1-1 External Appearance
(1) Dimensions (W x D x H) 105 mm x 154 mm x 52 mm
(2) Weight
Machine proper Approx. 250 g
In package Approx. 500 g (incl. a tape cassette, excl. dry cells)
1.1.2 Entry system
(1) Rubber keypad 4 keys
(2) Dial 32 positions
1.1.3 Display
(1) Display type Liquid crystal display (LCD)
(2) Number of columns 8 columns x 1 row
(See Figure 1.1-2.)
(3) Number of indicators 4 (See Figure 1.1-2.)

I- 2
1.1.4 Printing Mechanism
(1) Print system Direct thermal printing
(Fixed print head and tape feeding mechanism)
(2) Print speed 7.5 mm/second (Typical)
(3) Print head
Type Thermal print head
Heat generator Consists of 64 heating elements vertically aligned
Size of a heating element 0.136 mm wide by 0.106 mm high
1.1.5 Tape Cassette
(1) Cassette Cartridge type
(2) Tape type Direct thermal print tape
(3) Tape size Width: 9, 12 mm
Length: 8 m
(4) Tape cassette packed with the machine Character color: Black
Tape color: White
Tape width: 12 mm or 9 mm (EU)
Tape length: 4 m
1.1.6 Tape Cutter
(1) Tape cutting Manual cutting with the cutter lever
(2) Cutter unit User-replaceable

I- 3
Figure 1.1-2 Key Arrangement (1)

I- 4
Figure 1.1-2 Key Arrangement (2)