TEC Bar Code Printer
B-443
Original Oct., 1999
(Revision )
Document No. EO0-33006
PRINTED IN JAPAN
Service Manual
November, 99 All Rights Reservedi
B-443 Bar Code Printer
Service Manual
Table Of Contents
1. FUNDAMENTALS ABOUT THE SYSTEM................................................................................................. 1
1.1 FEATURES OF THE B-443...................................................................................................................................1
1.2 MODEL NAMING SYNTAX ................................................................................................................................. 1
1.3 OVERVIEW .......................................................................................................................................................2
1.3.1 Front View ................................................................................................................................................2
1.3.2 Rear View.................................................................................................................................................3
1.4 BASIC SPECIFICATIONS .....................................................................................................................................4
1.5 EFFECTIVE PRINT AREA....................................................................................................................................6
1.6 AVAILABLE BAR CODES....................................................................................................................................6
1.7 VARIOUS SENSORS............................................................................................................................................ 7
2. SUPPLY SPECIFICATIONS..........................................................................................................................9
2.1 TYPES OF PAPER...............................................................................................................................................9
2.2 SPECIFICATIONS ............................................................................................................................................... 9
2.3 APPROVED LABELS .........................................................................................................................................10
2.4 RIBBON SIZES AND SHAPES .............................................................................................................................10
2.5 APPROVED RIBBONS.......................................................................................................................................11
2.6 DETAIL TEST DATA .........................................................................................................................................11
3. ELECTRONICS............................................................................................................................................13
3.1 CIRCUIT DESCRIPTION ....................................................................................................................................13
3.2 MCU PIN DESCRIPTION..................................................................................................................................15
3.3 RESET CIRCUIT...............................................................................................................................................17
3.4 MEMORY SYSTEM ..........................................................................................................................................17
3.5 CONNECTOR CIRCUIT DIAGRAM......................................................................................................................18
3.6 REAL-TIME CLOCK CIRCUIT............................................................................................................................20
3.7 DECODE CIRCUIT............................................................................................................................................21
3.8 THERMAL HEAD DRIVE/ PROTECTION AND HISTORY CONTROL CIRCUIT ...........................................................23
3.9 24V/5V CONVERTER CIRCUIT ........................................................................................................................24
3.10 STEPPING MOTOR AND DC MOTOR DRIVER/ PROTECTION CIRCUIT ...............................................................25
3.11 COMMUNICATION (SERIAL & PARALLEL PORT) CIRCUIT ................................................................................26
3.12 CUTTER DRIVE CIRCUIT................................................................................................................................27
3.13 MAINBOARD REPLACEMENT..........................................................................................................................28
3.14 FLASH MEMORY REPLACEMENT.....................................................................................................................32
3.15 CUTTER, DC MOTOR, STEPPING MOTOR DRIVER IC REPLACEMENT...............................................................33
4. MECHANISM...............................................................................................................................................34
4.1 CUTTER INSTALLATION ..................................................................................................................................34
4.2 PRINT HEAD REPLACEMENT............................................................................................................................35
4.3 DC MOTOR REPLACEMENT.............................................................................................................................37
4.4 RIBBON REWIND SPINDLE ENCODER REPLACEMENT.........................................................................................38
4.5 FELT FABRIC REPLACEMENT...........................................................................................................................39
4.6 STEPPING MOTOR REPLACEMENT....................................................................................................................41
4.7 BLACK MARK SENSOR / GAP SENSOR (RECEIVER) REPLACEMENT.....................................................................42
4.8 RIBBON SENSOR (RECEIVER) REPLACEMENT....................................................................................................43
4.9 RIBBON SENSOR (TRANSMITTER) / GAP SENSOR (TRANSMITTER) REPLACEMENT..............................................45
4.10 PLATEN REPLACEMENT.................................................................................................................................46
4.11 HEAD-UP SENSOR REPLACEMENT..................................................................................................................49
4.12 PARTS LIST ..................................................................................................................................................57
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5. TROUBLE SHOOTING...............................................................................................................................67
5.1 ERROR MESSAGES..........................................................................................................................................67
5.2 TROUBLE SHOOTING.......................................................................................................................................68
5.3 CALIBRATE THE GAP REGISTER.......................................................................................................................69
5.4 SELF-TEST......................................................................................................................................................69
5.5 RAM CLEAR ...................................................................................................................................................69
5.6 DIAGNOSIS OPERATION PROCEDURE................................................................................................................69
5.7 TESTING SENSORS ..........................................................................................................................................70
5.8 CLEANING THE PRINT HEAD............................................................................................................................72
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1. FUNDAMENTALS ABOUT THE SYSTEM
1.1 Features of the B-443
1. B-443 bar code printer prints bar codes, characters, logos, on various types of labels and
tickets by direct thermal or thermal transfer printing.
2 B-443 adopts a “BASIC-like” high level programming language to help users programme the
desired label forms with ease.
3. B-443 bar code printer can be connected to personal computer or optional LCD keyboard to
execute the programs downloaded in the printer’ s memory. The printer is equipped with the
following standard devices: black mark sensor, peel off module and real time clock
4. B-443 bar code printer provides a selection of optional features, including cutter module,
memory module, portable LCD keyboard, etc.
5. User friendly label design package software is bundled with B-443.
1.2 Model Naming Syntax
B – 4 4 3 –Q P
Destination Code:
QP: Europe
GH12-GB: UK
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1.3 Overview
1.3.1 Front View
Fig. 1.1 Front View of B-443
Front Panel
Cover Release Button
Top Cover
Operation Panel
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1.3.2 Rear View
Fig. 1.2 Rear view of B-443
DC Power Jack
RS-232 Interface
Centronics Interface
Label Entrance
(
External Mount
Use)
Power Switch
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1.4 Basic Specifications
n Thermal transfer and direct thermal printing
n High dot density printing (203 dots/inch)
n Selectable print speeds at 1.5”, 2.0” or 3.0” per second
n Supports parallel and serial interface
n Maximum media width up to 4.4” (114 mm)
n Adjustable label edge guide
n International character sets
n Print area is 4.09”W x 90”L (without any file downloaded in the printer memory)
n User selectable bar code ratios and heights
n Prints on labels or tickets
n Equipped with black mark sensor
n Equipped with Real Time Clock
n Comes with self-peeling function
n Buzzer provided to warn of possible errors
n Label stock and thermal transfer ribbon easy to install
n Internal label print counter
n Self test and hex dump mode
n Downloadable fonts from label design software
Electronics/Communication Specifications
n Electrical
CPU: MITSUBISHI M37720S1BFP
TPH: ROHM 4” KF-2004-GC17B
Stepping Motor: Mitsumi
DC Motor: DC24V
Memory:
-- DRAM: MOSEL 2 Mb.
-- Flash: ATMEL 1 Mb
Adapter 100~240VAC ± 10%, 50~60Hz
Regulations: CE, TÜV-GS
n Communications Interface:
Serial port: RS-232C (DB-9) at 2400, 4800, 9600 or 19200 baud rate
-- Word Length: 7 or 8 data bits, 1 or 2 stop bits, selectable parity
-- Handshaking: XON/XOFF and DSR/DTR
Parallel port: Standard parallel interface
Input Buffer: 60KB
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n RS-232 Interface Pin Configuration:
Host Function 9 Pin 25 Pin 9 Pin Printer Function
1 +5V
RxD 2 3 2 TxD
TxD 3 2 3 RxD
DTR 4 20 4 DSR
GND 5 7 5 GND
DSR 6 6 6 RDY
RTS 7 4 7 N/C
CTS 8 5 8 RDY
9 +5V
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1.5 Effective Print Area
Label/Ticket Length 12mm~2286mm
Effective Print Length 10mm~2284mm
Label/Ticket Width 25mm~103mm
Effective Print Width 23mm~101mm
No Print Area 1mm
1.6 Available Bar Codes
n Code 39
n Code 93
n Code 128 UCC
n Code 128, Subsets A, B, and C
n Codabar
n Interleaved 2 of 5
n EAN-8, EAN-13, EAN-128
n UPC-A, UPC-E
n EAN and UPC with 2 or 5 digits add-on
n UPC Shipping container code
n Postnet
n Maxicode
n PDF-417
n DataMatrix
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1.7 Various Sensors
(1) Feed Gap Sensor
The feed gap sensor detects label gap to locate the starting print position of the next label. The
sensor is mounted 4 mm off the center line of the main mechanism.
.
n In case of Label
(2) Black Mark Sensor
The black mark sensor locates the position of label by emitting infrared rays onto the black mark
at the back of the ticket. The sensor is mounted 5.75 mm off the center line of the ticket roll width
on the mechanism.
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n In case of Ticket
The default sensor position is (1) as shown in the figure below. To change to the (2) position, the
customer should notify the manufacturer in advance. There can be only one position for the
sensor. Once the sensor position is agreed upon, it can not be changed afterwards.
(3) Ribbon End Sensor
The sensor detects the end portion of the ribbon. The ribbon end must be transparent.
(4) Label End Sensor
The sensor detects the end portion of the label.
(5) Peel off Sensor
The sensor detects the backing paper of a label.
(6) Ribbon encoder
The encoder is used to detect if the ribbon is broken.
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2. SUPPLY SPECIFICATIONS
2.1 Types of Paper
Two types of media are available for B-443: label and ticket.
In B-443, there are two types of sensors for paper: gap sensor and black mark sensor.
Label and ticket can be further classified into direct thermal type or thermal transfer type.
2.2 Specifications
Items Label
Max.114mm
Paper Width
Min. 25mm
Length (Pitch) 12 ~ 2286mm
Thickness 0.20 mm
Inner roll diameter. Max 4.3” (110mm)
Max. Roll
Diameter
(1” core)
External roll diameter. Max 8.4” (214mm)
Roll Up Method Print surface wound outside as standard
Paper Core ID.
φ25.7 ± 0.3mm
Note:
(1). The width and thickness quoted above are said of the label plus its backing paper.
(2). Likewise, the approval of label entails that of its backing paper.
(3). In the peel off mode, the minimum pitch is 35mm.
(4). In the cutter mode, it is required the paper be wound outside. Otherwise, paper jam tends to result.
(5). In the cutter mode, the paper thickness is 0.2 mm at maximum, and the paper weight is 100
g/m2 at maximum.
(6). Paper shape is as shown on next page.
(7) Tag is 0.2mm in thickness, and is less than 240g/m2 in weight.
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2.3 Approved labels
l Plain paper
l Ricoh 130LAB thermal label
l Flexcon 31800 PVC label
l Flexcon 22830 Polyester label.
2.4 Ribbon Sizes and Shapes
Item Specifications
Ribbon shape Spool type
Max. 110mm
Ribbon width
Min. 40mm
Max. 110mm
Ribbon winding width
Min. 40mm
Leading tape
Polyester film, 335±5mm long
End tape
Polyester film (transparent), 250±5mm long
Max. ribbon OD.
φ67mm
Winding method Ink surface to be wound outside
Note: The maximum length of ribbon depends on its thickness and core outside
diameter.
The formula below defines the correlation between ribbon roll length and ribbon core diameter.
t
4
)d(D
= L
22
π×−
,
where
L = Ribbon length
D = Max. roll diameter
d = Ribbon core outside diameter
t = Ribbon thickness
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2.5 Approved Ribbons
The following ribbons appoved should be used.
The manufacturer ink name of the ribbon must not be revealed, and handled carefully.
Item Code Manufacturer Ink Name
BR-30**A4N *1 AWR-470 ARMOR
BR-30**R1 B-110A RICOH
BR-30**R2 B-110C RICOH
BR-30**S2N TR4085 Sony Chemical
BR-30**S4P *2 TR4065 Sony Chemical
BR-30**S3S TR4070 Sony Chamical
The asterisk (*) in the above table indicates a number corresponding to the ribbon width.
*1:This cannot be used when a serial bar code is printed, and print density should be lower at 40 degree.
*2:This cannot be used when a serial bar code is printed at 3 inch per sec.
Note: The ribbon end must be transparent for B-443.
2.6 Detail test data
(1). SONY TR-4085, Plain paper, Static Electricity Max. 0.4 KV
Speed 1.5, Density 2~11
Speed 2.0, Density 4~12
Speed 3.0, Density 4~15
(2). FujiCopian FBR TTM-84, Plain paper, Static Electricity Max. 0.5 KV
Speed 1.5, Density 0~4
Speed 2.0, Density 4~7
Speed 3.0, Density 7~15
(3). RICOH B-110A, Plain paper, Static Electricity Max. 0.6 KV
Speed 1.5, Density 2~15
Speed 2.0, Density 4~15
Speed 3.0, Density 7~15
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(4). SONY TR-4070, Flexcon 31800 PVC label, Static Electricity Max.0.6 KV
Speed 1.5, Density 8~15
Speed 2.0, Density 9~15
Speed 3.0, Density N/A
(5). RICOH B-110C Flexcon 31800 PVC label, Static Electricity Max.0.9 KV
Speed 1.5, Density 6~15
Speed 2.0, Density 7~15
Speed 3.0, Density N/A
(6). SONY TR-4070, Flexcon 22830 (SPS-007) Polyester label, Static Electricity Max.0.6 KV
Speed 1.5, Density 10~15
Speed 2.0, Density 13~15
Speed 3.0, Density N/A
(7). RICOH B-110C Flexcon 22830 (SPS-007) Polyester label, Static Electricity Max.0.9 KV
Speed 1.5, Density 9~15
Speed 2.0, Density 11~15
Speed 3.0, Density N/A
(8). RICOH 130LAB thermal paper
Speed 1.5, Density 8~15
Speed 2.0, Density 10~15
Speed 3.0, Density 13~15
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3. ELECTRONICS
3.1 Circuit Description
L1
C1
10u
+5V
OUT1VCC
2
GND
3
U2
S-807
C2
0.1u
+5V
C3
20P
C4
20P
X1
16MHz
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
A8
A9
A10
A11
A12
A13
A14
A15
12
U7A
74LS05
34
U7B
74LS05
56
U7C
74LS05
8 9
U7D
74LS05
R8
3.3KR91.8K
R10
910
R11
430
R13
1M
R/W
/RAS
/CAS
/E
1011
U5E
74HC04
ST0
ST1
RDY
C7
0.1u
1
2
3
U24A
74HC32
4
5
6
U24B
74HC32
8
9
10
U24C
74HC32
¸Á»ï¾¹
L5
L21
C70
0.1u
C49
0.1u
P67/RTP13
1
P66/RTP12
2
P65/RTP11
3
P64/RTP10
4
P63/RTP03
5
P62/RTP02
6
P61/RTP01
7
P60/RTP00
8
P57/TB1IN
9
P56/TB0IN
10
P55/TA4IN
11
P54/TA4OUT
12
P53/TA3IN
13
P52/TA3OUT
14
P51/TA2IN
15
P50/TA2OUT
16
P107/MA9
17
P106/MA8
18
P105/RAS
19
P104/CAS
20
P103/TC
21
P102/INT2
22
P101/INT123P100/INT0
24
P47/DBC
25
P46/VPA
26
P45/VDA
27
P44/QCL
28
P43/MX
29
30
RDY31HOLD32BYTE
33
CNVSS
34
RESETOUT
35
RESET
36
XIN
37
XOUT
38
E
39
VSS
40
VCC
41
ST0
43
ST1
42
ALE
44
BLE
45
BHE
46
R/W
47
A23/D748A22/D649A21/D550A20/D451A19/D352A18/D253A17/D154A16/D0
55
A15/D15
56
A14/D14
57
A13/D13
58
A12/D12
59
A11/D11
60
A10/D10
61
A9/D9
62
A8/D8
63
A7/MA7
64
A6/MA6
65
A5/MA5
66
A4/MA4
67
A3/MA3
68
A2/MA2
69
A1/MA1
70
A0/MA0
71
P97/DMAREQ3
72
P96/DMAACK3
73
P94/DMAACK2
75
P92
77
P95/DMAREQ2
74
P93/DMAREQ1
76
P91/DMAREQ0
78
P90/DMAACK0
79
P87/TXD1
80
P86/RXD1
81
P85/CLK1
82
P84/CTS1/RTS1
83
P83/TXD0
84
P82/RXD0
85
P81/CLK0
86
P80/CTS0/RTS0
87
VCC88AVCC89VREF
90
AVSS91VSS
92
P77/AN7
93
P76/AN6
94
P75/AN5
95
P74/AN4
96
P73/AN3
97
P72/AN2
98
P71/AN1
99
P70/AN0
100
U1
M37721S1AFP
MA[0..9]
RX1
RX2
TX1
TX2
PE
/ERROR
SELECT
INT
COMMUNICATION SYSTEM
RX1
RX2
TX1
TX2
PE
/ERROR
SELECT
INT
PHASE1
PHASE2
PHASE3
I1
I0
DCM
CUTTER
MOTOR
R/W
MOTOR SYSTEM
PHASE1
PHASE2
PHASE3
I1
I0
DCM
CUTTER
MOTOR
R/W
/RAS
DRAMWR
/OE
DRAMOE
R/W
MEMORY SYSTEM
/RAS
DRAMWR
/OE
DRAMOE
R/W
DI
/LAT
CLK
PH_HEAT
HISTORY
PH
TM
Vdet
PRINT SYSTEM
DI
/LAT
CLK
PH_HEAT
HISTORY
PH
TM
Vdet
ALE
DO[0..7]
ST0
ST1
MA[0..9]
A[8..15]
GAP_EMITTER
BUZZER
CUTTER SENSOR
DECODER SENSOR
GAP SENSOR
B.L. SENSOR
PEEL SENSOR
FEED BUTTON
PAUSE BUTTON
RIBBON SENSOR
POWER LED
ONLINE LED
ERROR LED
PH_DETECT SENSOR
Fig. 3.1 MCU Circuit Diagram
The above is the MCU circuit diagram.
The main board of B-443 consists of five system blocks:
A. Memory System (decoder & memory block)
B. Motor System (stepping motor, DC motor and cutter block)
C. Print head System
D. Communication System (serial & parallel port block)
E. Power System
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The figure below shows the PCB system area.
Fig. 3.2 System Blocks of PCB
MOTOR
SYSTEM
MEMORY
SYSTEM
RTC
COMMUNICATION
PORT
DECODER
SYSTEM
PRINTHEAD
SYSTEM
POWER
SYSTEM
MCU
MEMORY CARD
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3.2 MCU Pin Description
Pin Name Input/Output Function
Vcc, Vss Power supply
Supply 5V±10% to Vcc and 0V to Vss.
CNVss CNVss input Input This pin controls the processor mode.
Connected to Vss for single-chip mode, to
Vcc for external ROM types.
/RESET Reset input Input To enter the reset state, this pin must be kept
at “L” condition, and maintained so for the
required time.
X
IN
Clock input Input
X
OUT
Clock output Output
These are I/O pins of internal clock
generating circuit. Connect a ceramic or
quartz crystal resonator between X
IN
and X
OUT
.
When an external clock is used, the clock
source should be connected to the XIN pin,
and the X
OUT
pin should be left open.
/E Enable output Output Data/instruction read and data write are
performed when output from this pin is “L”.
BYTE Bus width
selection input
Input In memory expansion mode or
microprocessor mode, this pin determines
whether the external data bus is of 8-bit width
or 16-bit width. The width is 16 bits for “L”
signal input and 8 bits for “H” signal input.
/HOLD /HOLD input pin Input This is an input pin for the /HOLD request
signal.
/RDY /RDY input pin
Input
This is an input pin for the /RDY signal.
ϕ1 Clock ϕ1 output
Output
This is the ϕ1 output pin, which is equal to the
clock XIN pin divided by 2.
ST0, ST1 Status signal
output pin
Output The bus use status output is generated in 2-
bit code
AVcc, AVss Analog supply
input
Power supply for the A-D converter. Connect
AVCC and AVSS to VSS externally.
V
REF
Reference
voltage input
Input This is reference voltage input pin for the A-D
converter.
A0/MA0~
A7/MA7
Address loworder/DRAM
address
Output This is an output pin for the 8 low-order bits of
addresses. When the DRAM is to be
accessed, the row and column addresses are
generated by means of time division
multiplexing.
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A8/D8~
A15/D15
Address
medium-order/
data high-order
I/O When the BYTE pin is set to “L” in memory
expansion mode or microprocessor mode and
external data bus is 16-bit width, high-order
data (D15~D8) is input or output when /E
output is “L” and an address (A15~A8) is
output when /E output is “H”.
If the BYTE pin is “H” that is an external data
bus is 8-bit width, only address (A15~A8) is
output.
A16/D0~
A23/D7
Address highorder/data loworder
I/O In memory expansion mode or
microprocessor mode low-order data (D7~D0)
is input or output when /E output is “L” and an
address (A23~A16) is output when /E output
is “H”.
R/W, /BHE
ALE, /BHE
Memory Control
signal output
Output These are R/W, /BHE, ALE, and /BLE output
pins.
P40~P47 I/O port P4 I/O This port is provided 5-bit I/O. As it has an I/O
register, it is possible to perform programming
to determine whether each bit serves as an
input pin or an output pin.
P50~P57 I/O port P5 I/O This port is used for 8-bit I/O. It has basically
the same function as port P4. In addition, it
provides timer A2, timer A3, timer A4 with I/O
pins and TimeB0, and TimeB1 with input pins.
P60~P67 I/O port P6 I/O This port is used for 8-bit I/O. It has basically
the same function as port P4. In addition, pins
P60 through P63 and pins P64 through P67
are capable of functioning as a 4-bit real-time
output, respectively.
P70~P77 I/O port P7 I/O This port is used for 8-bit I/O. It has basically
the same function as port P4. In addition, it
provides input pins for analog inputs AN0
through AN7. Pin P77 is also used for A-D
conversion start trigger input.
P80~P87 I/O port P8 I/O This port is used for 8-bit I/O. It has basically
the same function as port P4. In addition, it
provides RxD, TxD, CLK, /CTS//RTS
terminals for UART 0 and UART 1.
P90~P97 I/O port P9 I/O This is an 8-bit I/O port. It has basically the
same function as port P4. In addition, it
provides DMA request input pin and DMA
acknowledge signal output pin.
P100~P107 I/O port P10 I/O This is an 8-bit I/O port. It has basically the
same function as port P4. In addition, it
provides the /INT0, /INT1, /INT2 input pins,
/TC I/O pins, and /RAS, /CAS, MA8, MA9
output pin.
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3.3 Reset Circuit
OUT
1
VCC
2
GND
3
U2
S-807
C2
0.1u C47
0.1uF
VCC
RESET
Fig. 3.3 Reset Circuit
This is the reset circuit .The 80746ALO IC outputs the system reset signal of “LOW” when the
driving voltage is lower than 4.6V (Typical).
3.4 Memory System
VCC
1
DQ0
2
DQ1
3
DQ2
4
DQ3
5
VCC
6
DQ4
7
DQ5
8
DQ6
9
DQ7
10
NC
11
NC
12
W
13
RAS
14
NC/A11
15
NC/A10
16
A0
17
A1
18
A2
19
A3
20
VCC
21
GND
22
A4
23
A5
24
A6
25
A7
26
A8
27
A9
28
OE
29
UCAS
30
LCAS
31
NC
32
DQ8
33
DQ9
34
DQ10
35
DQ11
36
GND
37
DQ12
38
DQ13
39
DQ14
40
DQ15
41
GND
42
U15
TMS416160P
/RAS
DRAMWR
A18
1
A16
2
A15
3
A12
4
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A012AD0
13
AD1
14
AD2
15
GND
16
AD3
17
AD4
18
AD5
19
AD6
20
AD7
21
CE
22
A10
23
OE
24
A11
25
A9
26
A8
27
A13
28
A14
29
A17
30
WE
31
VCC
32
U16
29C040
A[8..23]
MA[0..9]
DO[0..7]
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7 A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
/OE
DRAMOE
ROM1
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
/LCAS
/UCAS
R/W
VCC
VCC
DO[0..7]
MA[0..9]
A[8..23]
A18
1
A16
2
A15
3
A12
4
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A012AD0
13
AD1
14
AD2
15
GND
16
AD3
17
AD4
18
AD5
19
AD6
20
AD7
21
CE
22
A10
23
OE
24
A11
25
A9
26
A8
27
A13
28
A14
29
A17
30
WE
31
VCC
32
U25
29C040
VCC
ROM2
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
A19
1
A18
2
A17
3
A16
4
A15
5
A14
6
A13
7
A12
8
CE
9
VCC
10
NC
11
RESET
12
A11
13
A10
14
A9
15
A8
16
A7
17
A6
18
A5
19
A4
20
A3
21
A2
22
A1
23
A024DO0
25
DO1
26
DO2
27
DO3
28
GND
29
GND
30
VCC
31
DO4
32
DO5
33
DO6
34
DO7
35
RDY
36
OE
37
WE
38
NC
39
NC
40
U26
49F080(TSOP)
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
ROM3
VCC
/RESET
A19
OPTIONAL FLASH ROM
Fig. 3.4 FLASH ROMS and DRAM Diagram
This is the memory circuit. The U16&U17 type 512K Byte FLASH ROM,U26 type 1M Byte
FLASH ROM and U15 type 2M Byte DRAM are used. The MCU R/W pin becomes “H” when
reading Flash ROM or DRAM, and “L” when writing.
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3.5 Connector Circuit Diagram
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
JP8
MEM. CARD
L32
BEAD
1
2
3
4
5
6
JP1
6 PIN
12
U5A
74HC04
34
U5B
74HC04
56
U5C
74HC04
R5
100
R6
100
R7
100
1
2
3
JP2
RIBBON
1
2
3
JP4
B.L.
1
2
3
4
5
JP6
DC MOTOR
C68
0.1u
DCMB
DCMA
1 2
U11A
74LS14
1
2
3
4
5
6
JP5
6 PIN
1
2
3
4
5
6
7
JP3
1
2
PH_DERECT
1
2
JP8
PH_DERECT
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
A8
A9
/RESET
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
/E
R/W
OE
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
+5V
+24V
+5V
+5V
+5V
+5V
+5V
+5V
P65
CUTTER
P53
PH_DETECT
P45
P46
P47
P72
P60
P62
P63
P57
DC_MOTOR_A
DC_MOTOR_B
P64
GAP_EMITTER
Fig. 3.5 Connector Circuit Diagram
P45~P47 are output pins from MCU, which control the Power-on, Feed and Error LEDs
respectively. The LED lights on when the signal is “low”, goes out when the signal is “ on”.
P72: the detect pin of push button.(normally at ‘ high’ level)
P60: the detect pin of feed button. (normally at ‘ high’ level)
P65: the detect pin of the peel-off sensor. (normally at ‘ high’ level)
P62: the detect pin of the ribbon sensor. (normally at ‘ high’ level)
P63: the detect pin of the black mark sensor. (normally at ‘ high’ level)
P64: the detect pin of the gap sensor and print head micro sensor. (normally at ‘ high’ level)
Memory card connector
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B-443 Bar Code Printer
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P57: the detect pin of the decoder sensor. (normally at ‘ high’ level)
P53:the detect pin of the cutter sensor (check if the cutter is in right position, normally at ‘ high”
level)
JP8: the connector which connects the external memory module.
CUTTER: the control pin of the CUTTER system.
DC_MOTOR_A: the control pin of the DC MOTOR system.
DC_MOTOR_B: the control pin of the DC MOTOR system.
GAP_EMITTER: the control pin of the GAP EMITTER system
PH_DETECT: the detect pin of the print head open detect sensor
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3.6 Real-Time Clock Circuit
MOT
1
NC2NC
3
AD0
4
AD1
5
AD2
6
AD3
7
AD4
8
AD5
9
AD6
10
AD7
11
GND
12
CS
13
AS
14
R/W
15
NC
16
DS
17
RESET
18
IRQ
19
NC
20
RCLR
21
NC
22
SQW
23
VCC
24
U14
DS12887A
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
DO[0..7]
DO[0..7]
+5V
DS
RTC
AS
R/W
BZ1
R50
5.6K
C66
0.1u
/RES
+5V
BUZZER
Fig. 3.6 Real-Time Clock Circuit
This is a real-time clock circuit. MCU will read the date/time and write the data when the signal
of RTC is low. AS is the address strobe signal. DS is the data strobe signal. R/W decides
whether MCU is in read mode or write mode. When R/W is at ‘ HIGH’ level, MCU reads data or
time from RTC. When R/W is at ‘ LOW’ level, MCU writes data to RTC.
November, 99 All Rights Reserved21
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3.7 Decode Circuit
D03Q0
2
D14Q1
5
D27Q2
6
D38Q3
9
D413Q4
12
D514Q5
15
D617Q6
16
D718Q7
19
OE
1
LE
11
U3
74HC373
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
A16
A17
A18
A19
A20
A21
A22
A23
CLKI/0
1
I1
2
I2
3
I3
4
I4
5
I5
6
I6
7
I7
8
I8
9
GND
10
OE/I9
11
I/O0
12
I/O1
13
I/O2
14
I/O3
15
I/O4
16
I/O5
17
I/O6
18
I/O7
19
VCC
20
U8
PALCE16V8
DIGITAL GND
A18
A19
A20
A21
A22
A23
/E
123456789
10
RN5
10K
VCC
CLKI/0
1
I1
2
I2
3
I3
4
I4
5
I5
6
I6
7
I7
8
I8
9
GND
10
OE/I9
11
I/O0
12
I/O1
13
I/O2
14
I/O3
15
I/O4
16
I/O5
17
I/O6
18
I/O7
19
VCC
20
U10
PALCE16V8
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
C69 30p
A[8..23]
VCC VCC
/UCAS
/LCAS
RTC
DS
AS
ST0
ST1
/CAS
DO[0..7]
ALE
/E
RESET
CENTRONIC
ROM2
ROM3
ROM12
ROM11
MA0
Fig. 3.7 Decode Circuit
This is the decode circuit which calculates memory map. U3 is used to latch addresses from
DO0 to DO7. The main function of U8 and U10 are to decode the address and memory control
signal .The memory map of B-443 is as shown in Figure 1.2.
The pin function description is as follows:
AS: The address strobe control signal of RTC.
DS: The data strobe control signal of RTC.
/CAS: The DRAM column address control pin of MCU.
/LCAS: The bank 0 column address control pin of DRAM.
/UCAS: The bank 1 column address control pin of DRAM.
RTC: The chip select pin of RTC.
CENTRONIC: Enable MCU to read data from parallel port.
ROM11: The chip select pin of U16 when system is in normal mode.
ROM12: The chip select pin of U16 when system is in BIOS update mode.
ROM2: The chip select pin of U25.
ROM3: The chip select pin of U26.
ST0: Status signal output pin of MCU.
ST1: Status signal output pin of MCU.
November, 99 All Rights Reserved22
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Service Manual
DRAM
(INTERNAL RAM2)
FFFFFFH
F00000H
EFFFFFH
E00000H
DRAM
(INTERNAL RAM1)
8FFFFFH
800000H
FLASH ROM
EXTERNAL ROM5
(ON BOARD)
FLASH ROM
EXTERNAL ROM4
(MEMORY CARD)
6FFFFFH
600000H
5FFFFFH
500000H
FLASH ROM
EXTERNAL ROM3
(MEMORY CARD)
RTC ADDRESS PORT
RTC DATA PORT
CENTRONIC PORT
PARALLEL COMMUNICATION
400001H
400000H
380000H
2FFFFFH
200000H
FLASH ROM
EXTERNAL ROM2
(MEMORY CARD)
FLASH ROM
EXTERNAL ROM1
(MEMORY CARD)
1FFFFFH
100000H
0FFFFFH
080000H
07FFFFH
002000H
FLASH ROM
INTERNAL ROM2
(ON BOARD)
FLASH ROM
INTERNAL ROM1
SYSTEM BIOS
Fig. 3.8 The Memory Map of B-443
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Service Manual
3.8 Thermal Head Drive/ Protection and History Control Circuit
VH
1
GND
2
VH
3
GND
4
VH
5
GND
6
/LAT
7
DI2
8
DI1
9
NC
10
STB4
11
STB3
12
STB2
13
STB1
14
TM
15
TM
16
DO1
17
VDD
18
CLK
19
DO2
20
VH
21
GND
22
VH
23
GND
24
VH
25
GND
26
JP9
ROHM
DI
/LAT
CLK
VCC
C20
0.1u
R37
20K
Z1
4.7V
A
1
B
2
CLR3Q
4
Q
13
Cext
14
RCext
15
U12A
74HC123
R39
150K
VCC
1213
U5F
74HC04
PH_HEAT
8
9
10
U9C
74HC08
11
12
13
U9D
74HC08
HISTORY
Q1
HSC945
Q2
2SJ177
Q3
2SJ177
Q4
2SJ177
Q5
2SJ177
VDD
R21
10K
R42
10
R22
10K
R43
1K
PH
STROBE1
STROBE2
STROBE1
TM
R44
3.9K
R48 1K
Vdet
1
2
3
J1
200DPI
STROBE1
300DPI
1
2
3
200DPI
300DPI
DIGITAL GND
89
U5D
74HC04
1
2
3
U9A
74HC08
/RESET
VH_POWER
C22
10u\TANT
Z2
IN4745\16V
Analog Ground
Analog Ground
Analog Ground
C79
300p
C80
220p
MOTOR_GND
VH
1
VH
2
VH
3
VH
4
DO
5
LAT
6
CLK
7
VDD
8
STB1
9
STB2
10
STB3
11
PGND
12
PGND
13
PGND
14
PGND
15
JP91A
ROHM_PD1
PGND
1
PGND
2
PGND
3
PGND
4
LGND
5
TM
6
TM
7
STB4
8
STB5
9
STB6
10
DI
11
VH
12
VH
13
VH
14
VH
15
JP92B
ROHM_PD1
VH_POWER
STROBE1
VCC
R38
20K
C21
0.1u
OPTIONAL CIRCUIT
WHEN OPTIONAL CIRCUIT DON'T USE. THE
PIN2&3 OF Q2-Q5 MUST BE CONNECTTED
TOGETHER
PH_GND
¬O¦L¦rÀY¨t²Î±µ¦a³¡¥÷
DIGITAL GND
¬O¼Æ¦ì¨t²Î³¡¥÷±µ¦a
DIGITAL GND
¬O¼Æ¦ì¨t²Î³¡¥÷±µ¦a
PVDD
¬O¦L¦rÀY³¡¥÷¹q·½
Fig. 3.9 Thermal Head Drive/ Protection and History Control Circuit
This is the thermal head drive/protection and history control circuit. CLK and /LAT are connected
to thermal head control clock and data latch respectively. PH controls the DC24V voltage of the
thermal head. When PH is “LOW”, the thermal head will be separated from 24V (VDD).
PH_HEAT determines whether to heat the thermal head or not. HISTORY determines whether
the history control is available or not. DI sends the printer data to the print head. TM is the
temperature/voltage sensor for thermal head. Vdet feeds back the voltage and compensates the
heat time for voltage accuracy when printing.
November, 99 All Rights Reserved24
B-443 Bar Code Printer
Service Manual
3.9 24V/5V Converter Circuit
SW
1
SWE
2
TC
3
GND
4
Vref
5
VCC
6
Ipk
7
VDD
8
U4
34063
R11
R2 1
R3
30K
R4
10K
C5
220p
C8
10u/35V
¹q¸Ñ¹q®e
D1
1N5819
L2
330u
C51
470u
C11
47u/35V
L3
1u
+5V
R12
1
L23
BEAT
B1
+24V
C10
0.1u
C6
1500pFC9
1000u/35V
SW1
SW SPDT
R56
470/2W
L14
CHOKE
D3
SR505
C82
0.01u
0.01u
L26
1
2
3
4
L4
COMM_CHOKE
Fig. 3.10 24V/5V Converter Circuit
Figure 3.10 is the DC-TO-DC (DC24V to DC 5V) converter circuit, which is a boost system
circuit structure. U4 is the DC-TO-DC converter IC, which converts voltage by using PWM
control mode. The output voltage is dependent on R3 and R4, and its value is derived by the
following formula:
November, 99 All Rights Reserved25
B-443 Bar Code Printer
Service Manual
3.10 Stepping Motor And DC Motor Driver/ Protection Circuit
MB
1
T
2
VMM
3
GND
4
VCC
6
I1
7
PHASE
8
I0
9
C
10
VR
11
MA
15
E
16
VMM
,14
GNDGNDGND
U17
PBL3770A
MB
1
T
2
VMM
3
GND
4
VCC
6
I1
7
PHASE
8
I0
9
C
10
VR
11
MA
15
E
16
VMM
,14
GNDGNDGND
U18
PBL3770A
C55
820p
C56
820p
C57
820p
C58
820p
R51
56K
R45
1K
R52
56K
R46
1K
R141R15
1
R161R17
1
PHASE1
PHASE2
VCC
VCC
VDD
VDD
L18
BEAD
L20
BEAD
C52
470u
C54
470u
C27
0.1u
C28
0.1u
MB
1
T
2
VMM
3
GND
4
VCC
6
I1
7
PHASE
8
I0
9
C
10
VR
11
MA
15
E
16
VMM
,14
GNDGNDGND
U19
PBL3770A
C59
820p
C60
820p
R53
56K
R47
1K
R181R19
1
VCC
VDD
L19 BEAD
C53
470u
C29
0.1u
PHASE3
DCMA
DCMB
Q6
TIF32C
R54
68
R55
390
VDD
D5
IN4002
CTSENS
R23
10K
VCC
A
9
B
10
CLR11Q
12
Q
5
Cext
6
RCext
7
U12B
74HC123
R40
150K
/RESET
VCC
1 16
9
GND
8
U20A
2003
2 15
9
GND
8
U20B
2003
3 14
9
GND
8
U20C
2003
4 13
9
GND
8
U20D
2003
DIGITAL GND
MOTOR_GND
MOTOR_GND
MOTOR_GND
MOTOR_GND
MOTOR_GND
MOTOR_GND
D12
1N4002
D13
1N4002
D14
1N4002
D15
1N4002
I1
I0
DCM
CUTTER
A
1
B
2
CLR3Q
4
Q
13
Cext
14
RCext
15
U13A
74HC123
C12
10u
R41
150K
VCC
MOTOR
DIGITAL GND
1
2
3
4
5
6
RN6
10K 6PIN
¸Á»ï¾¹
1A1
2
1A2
4
1A3
6
1A4
8
2A1
11
2A2
13
2A3
15
2A4
17
1Y1
18
1Y2
16
1Y3
14
1Y4
12
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1G
1
2G
19
U6
74LS244
C30
10u\TANT
1
2
3
4
5
6
7
JP3
CUTTER&PEEL
DIGITAL_GND
PEEL
VCC
DIGITAL GND
MOTOR_GND
1
2
3
4
JP12
STEP MOTOR
L31 BEAD
L30BEAD
L29BEAD
L28BEAD
L27
BEAD
L7
BEAD
C78
0.01uF
C77
0.01uF
C73
0.01u
C74
0.01u
C76
0.01u
C75
0.01u
F2
FUSE2
F1
FUSE2
F3
FUSE2
D16
DSP
D17
DSP
MOTOR_GND
13,12,5
13,12,5
13,12,6
BUZZER
VCC
Fig. 3.11 Stepping Motor And DC Motor Driver/ Protection Circuit
This is the Stepping Motor and DC Motor Drive/ Protection Circuit. Connector JP12 sends the
pattern as shown in table1. The status of I0 & I1 determines the stepping motor power level, the
power level pattern is as shown in table2. Motor port is the protection pin. When it is at ‘ LOW’
level, the power of the motor system will be closed. Power will be ON again when MOTOR pin is
the pulse of ‘ HIGH’ level. PHASE1 and PHASE2 determine the pattern of stepping motor drive
circuit. For example, the sequence of PHASE1/PHASE2 in full step mode is 0/0 -> 0/1 ->
1/1 -> 1/0.
Step
Pin on JP12
1 2 3 4 PHASE
1 ON ON ON A
2 ON ON /A
3 ON ON ON /B
4 ON ON B
Table1 Stepping Motor Pattern
MOTOR CURRENT I0 I1
HIGH LEVEL 100% L L
MEDIUM LEVEL 60% H L
LOW LEVEL 20% L H
ZERO CURRENT 0% H H
Table2 Stepping motor power pattern
The power of DC motor is on when DCM pin is at ’ LOW’ level. PHASE3 determines the DC
motor rotation direction (forward or backward).
November, 99 All Rights Reserved26
B-443 Bar Code Printer
Service Manual
3.11 Communication (Serial & Parallel Port) Circuit
C1+
1
V+
2
C1-
3
C2+
4
C2-
5
V-
6
T2OUT
7
R2IN
8
R2OUT
9
T2IN
10
T1IN
11
R1OUT
12
R1IN
13
T1OUT
14
GND
15
VCC
16
U21
RS232
RX1
RX2
TX1
TX2
C61
0.1u
C62
0.1u
C63
0.1u
C64
0.1u
L8
BEAD
C13
10u
L9 BEAD
L10BEAD
L11 BEAD
L12BEAD
CVCC
VCC
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
JP14
CENTRONIC
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
U22A
74LS74
3 4
U11B
74LS14
R57
100
C65
220p
D03Q0
2
D14Q1
5
D27Q2
6
D38Q3
9
D413Q4
12
D514Q5
15
D617Q6
16
D718Q7
19
OE
1
CLK
11
U23
74LS374
1
2
3
4
5
6
7
8
9
10
RN4
10K
CVCC
C38
220p
C39
220p
C40
220p
C41
220p
C42
220p
C43
220p
C44
220p
C45
220p
R24
100
R25
100
R26
100
R27
100
R28
100
R29
100
R30
100
R31
100
R33
100
R34
100
R35
100
R36
100
PE
/ERROR
SELECT
VCC
DO[0..7]
DO[0..7]
DO0
DO1
DO2
DO3
DO4
DO5
DO6
DO7
CENTRONIC
INT
C71
0.1u
CGND
CGND
CGND
CGND
DIGITAL GND
DIGITAL GND
5 6
U11C
74LS14
8 9
U11D
74LS14
10 11
U11E
74LS14
12 13
U11F
74LS14
R32
100
5
9
4
8
3
7
2
6
1
JP13
DB9_1
R20
100
Fig. 3.12 RS-232 (Serial Port) Circuit
The RS-232 Circuit is for use with the externally connected personal computer and keyboard
unit. JP13 connects to PC serial port through the RS-232 cable. RxD is the data receive pin of
MCU. CTS is the Clear To Send of MCU, which sends the signal from the external device. TxD
is the data output pin of MCU. RTS is the Request To Send signal which MCU sends to the
external device.
The parallel port circuit is for use with the external personal computer parallel port connected
through the printer cable. When PC’ s strobe signal comes in, the printer responds the ‘ busy
status’ until it reads the data from parallel port. Printer will respond the ‘ error signal’ to PC
when it is in error status.
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3.12 Cutter Drive Circuit
Q6
TIF32C
R54
68
R55
390
+24V
D5
IN4002
CTSENS
R23
10K
+5V
A
9
B
10
CLR11Q
12
Q
5
Cext
6
RCext
7
U12B
74HC123
R40
150K
/RESET
+5V
1 16
9
GND
8
U20A
2003
2 15
9
GND
8
U20B
2003
3 14
9
GND
8
U20C
2003
4 13
9
GND
8
U20D
2003
C30
10u\TANT
1
2
3
4
5
6
7
JP3
CUTTER&PEEL
PEEL
+5V
D16
DSP
D17
DSP
CUTTER
Fig. 3.13 Cutter Drive Circuit
This is the cutter drive circuit. The RESET signal is 1 when the printer is turned on. CUTTER
controls the activation of the cutter. The cutter is activated when CUTTER signal is “low”. The
sensor of cutter sends the “Hi-Low” signal to MCU through CTSENS pin that detects the action
of cutter.
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3.13 Mainboard Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel.
Fig. 3.14 Remove the front cover
in the direction of the arrows
5. Remove the two screws and the metal cover.
Fig. 3.15 Remove the screws
and metal cover
Screws
Metal Cover
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6. Release the cable tie and remove the peel-off sensor connector.
Fig. 3.16 Cable tie and peel-off sensor connector
7. Remove the screws on the lower left and lower right corners of main mechanism.
Fig. 3.17 Remove the screws in the lower left, lower
right corners of the main mechanism.
Cable Tie
Peel-Off Sensor
Connector
Cutter Connector
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8. Remove the four screws of the internal label roll mount.
Fig. 3.18 Remove screws of the label roll mount
9. Move the mechanism about 5 mm in the label feed direction.
10. Take out the internal label roll mount and remove the connector.
Fig. 3.19 Take out the internal label roll
mount and remove the connector
11. Remove the screw of ground wire on the mainboard.
12. Remove all connectors on the mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,
JP9, JP12)
Ground Wire
Push Button
Connector
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Connector Description
JP1 External button, LED connector
JP2 Ribbon sensor receiver connector
JP3 Cutter and Peel off sensor connector
JP4 Black mark sensor connector
JP5 Gap / ribbon transmit sensor connector
JP6 DC motor and encoder connector
JP7 TPH head up switch connector
JP8 Memory cartridge connector
JP9 TPH connector
JP12 Stepping motor connector
13. Take out the mechanism.
14. Replace the mainboard.
15. Reassemble the mechanism and internal label roll mount in the reverse procedures of the removal.
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3.14 Flash memory Replacement
If files can not be stored in the FLASH memory or if the firmware can not be upgraded, the first
LED turns ON and OFF incessantly to indicate the Flash memory fails. Please follow the steps
below to replace the flash memory.
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel.
5. Remove the two screws and the metal cover.
6. Release the cable tie and remove the peel-off sensor connector.
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of main mechanism.
9. Remove all four screws of the internal label roll mount.
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove the connector.
12. Use an IC clamp to remove the FLASH memory.
Fig. 3.20 Remove Flash Memory with an IC clamp
Note: The notch of flash memory and mark on the socket must face the same
direction.
13. Install the new FLASH memory.
14. Install the FLASH memory cartridge. Copy firmware into the new Flash memory cartridge.
15. Reassemble the mechanism and internal label roll mount in the reverse procedures of the
removal.
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3.15 Cutter, DC Motor, Stepping Motor Driver IC Replacement
Fig. 3.21 Driver IC Locations
If the DC motor (ribbon rewind spindle) rotates back and forth, please check the DC motor driver
IC, make sure it is firmly inserted in the IC socket and is not burned.
If the cutter does not work, please check that the software or program has been switched to the
cutter mode. If the cutter still does not function, please check the cutter driver IC, make sure it is
firmly inserted in the IC socket and is not burned.
The stepping motor driver IC is burned if the stepping motor makes noises but does not feed
labels when the FEED key is pressed. In this case, please replace with a new driver IC.
Use an IC clamp to remove the damaged IC.
Stepping
Motor Driver
DC Motor
Driver IC
Flash
Memory
Cutter Driver IC
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4. MECHANISM
4.1 Cutter Installation
1. Turn off the printer power.
2. Open the top cover of the printer.
3. Remove the printer front panel slowly and carefully. (Cf. Fig. 3.14)
4. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
5. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
6. Remove the peel-off sensor connector. (Cf. Fig. 3.17)
7. Plug in the cutter connector.
8. Insert the right and left side flange of cutter into the slot.
Fig. 4.1 Cutter Installation
9. Fasten the cutter from the bottom of the printer with the provided screw.
10. Make sure no screws or other parts are left in the printer.
11. Reassemble the mechanism and internal label roll mount in the reverse procedures of the
removal.
Right Flange
Left Flange
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4.2 Print Head Replacement
1. Turn off the printer power.
2. Remove the RS-232 cable and power cord.
3. Open the top cover.
4. Remove the ribbon and label roll.
5. Open the print carriage.
6. Remove the screw at the top front center of the mechanism, as shown.
Fig. 4.2 The Print Head Screw
7. Disconnect the print head cable.
Fig. 4.3 Printhead and the Cable
Print Head
Connector
Key of the
Connector
Print Head
Cable
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Note: The key of connector must be positioned upward.
Do not touch the elements of the print head.
Do not disassemble the print head.
8. Tidy up the cable so that it does not protrude or interfere with the ribbon.
9. Reassemble the removed parts in the reverse order of removal.
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4.3 DC Motor Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel. (Cf. Fig. 3.14)
5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of the main mechanism.
9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove connector JP1. (Cf. Fig. 3.19)
12. Remove the screw of ground wire on the mainboard.
13. Remove all connectors on the mainboard.
14. Take out the mechanism.
15. Remove the cable tie.
16. Remove the three screws on DC motor fixture.
Fig. 4.4 DC Motor Fixture
17. Remove the three screws used to fix DC motor from behind the fixture.
18. Replace the DC motor and motor wires.
19. Reassemble the removed parts in the reverse order of the removal.
DC Motor
Fixture
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4.4 Ribbon Rewind Spindle Encoder Replacement
The encoder is installed on the gear box of DC motor, and is used to detect if the ribbon can be
unerringly rewound by the spindle. The encoder is connected to JP6 on the mainboard. Please
switch the printer to thermal transfer mode. The multi-meter is used to measure the voltage of
Pin2 (+5V). If the voltage changes continuously from 0 to 5 volts DC, the encoder is in condition.
Otherwise, please follow the steps below to replace the encoder PCB
1. Follow directions in Section 4.3 to remove DC motor and DC motor fixture.
Fig. 4.5 DC Motor Encoder
2. Remove the two flat tap screws and cable tie.
3. Replace the Encoder PCB and Encoder Wires.
4. Reassemble the removed parts in the reverse order of removal.
DC Motor
Encoder
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4.5 Felt Fabric Replacement
Felt Fabric is located in the ribbon supply spindle. It is used to tighten the ribbon to prevent it
from getting wrinkled during printing. If the ribbon does not stretch tight when label back feeds
during printing, please replace the felt to secure the best printing quality. Follow the steps below
to replace the felt fabric.
1. Follow the instructions in Section 4.3 to remove DC motor and DC motor fixture.
2. Remove the E-ring and washer on ribbon supply spindle.
Fig. 4.6 Components of the
Ribbon Supply Spindle
3. Remove the spring cover, compression spring and spring holder.
4. Remove the spring, felt clutch and felt fabric.
5. Replace with a new felt.
Fig. 4.7 Side View of the
Ribbon Supply Spindle Assembly
E Ring
Washer
Spring Cover
Compression
Spring
Spring Holder
Spring
Felt Clutch
Felt Fabric
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6. Reassemble the removed parts in the reverse order of removal.
Fig. 4.8 Front View of the
Ribbon Supply Spindle
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4.6 Stepping Motor Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or Parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel. (Cf. Fig. 3.14)
5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig.
3.17)
9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19)
12. Remove the screw of ground wire on the mainboard.
13. Remove all the connectors on mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,
JP9, JP12)
14. Take out the mechanism.
15. Remove the two screws of the stepping motor.
Fig. 4.9 Stepping Motor
16. Replace the stepping motor, stepping motor wires, and reassemble the removed parts in the
reverse order of removal.
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4.7 Black Mark Sensor / Gap Sensor (Receiver) Replacement
Black mark sensor is reflection type sensor. It is connected to JP4 (3 pin connector). A multimeter is used to measure the signal of Pin2 to test if there is voltage variation when black mark
is detected. Before conducting the test, please invoke the BLINE command first. The printer will
switch from gap sensor to black mark sensor. If there is no voltage variation, please follow steps
below to replace the black mark sensor / gap sensor (receiver) PCB.
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel. (Cf. Fig. 3.14)
5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig.
3.17)
9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19)
12. Remove the screw of ground wire on the mainboard.
13. Remove all the connectors on mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,
JP9, JP12)
14. Take out the mechanism.
15. Remove one flat tap screws and black mark sensor PCB.
Fig. 4.10 Black Mark Sensor and Gap Receiver Sensor
16. Reassemble the removed parts in the reverse order of removal.
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4.8 Ribbon Sensor (Receiver) Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel. (Cf. Fig. 3.14)
5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig. 3.17)
9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19`)
12. Remove the screw of ground wire on the mainboard.
13. Remove all the connectors on mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11, JP7,
JP9, JP12)
14. Take out the mechanism.
15. Remove the screws, springs and spring bushing on both sides of the mechanism.
Fig. 4.11 Ribbon Sensor Cover
Flat Tap Screw
Sensor Cover
Print Head
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Fig. 4.12 Ribbon Sensor
Fig. 4.13 Spring Installation on Left Side and Right Side
Note: The left side spring and the right side spring are different in shape. The right
side spring has a straight end, whereas the left side spring has an end that is
curved 90 degrees.
16. The main mechanism is divided into upper mechanism and lower mechanism.
17. The ribbon sensor (receiver) is located in the upper mechanism.
18. Remove the screws on the ribbon sensor cover.
19. Replace with a new ribbon sensor PCB.
20. Reassemble the removed parts in the reverse order of removal.
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4.9 Ribbon Sensor (Transmitter) / Gap Sensor (Transmitter) Replacement
1. Please follow the steps in Section 4.6 to separate the upper mechanism from the lower
mechanism.
2. The ribbon sensor (transmitter) is located in the center of the lower mechanism.
Fig. 4.14 Ribbon Sensor (Transmitter)
3. Remove the two flat tap screws
4. Remove the cable tie and sensor PCB.
5. Replace with a new PCB. Reassemble the removed parts in the reverse order of removal.
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4.10 Platen Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or parallel port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel. (Cf. Fig. 3.14)
5. Remove the two screws and the metal cover. (Cf. Fig. 3.15)
6. Release the cable tie and remove the peel-off sensor connector. (Cf. Fig. 3.16)
7. Remove the screw on the PCB of peel-off and cutter connector.
8. Remove the screws in the lower left, lower right corners of the main mechanism. (Cf. Fig. 3.17)
9. Remove all four screws of the internal label roll mount. (Cf. Fig. 3.18)
10. Move the mechanism in the label feed direction about 5 mm.
11. Take out the internal label roll mount and remove the connector. (Cf. Fig. 3.19)
12. Remove the screw of ground wire on the mainboard.
13. Remove all the connectors on the mainboard. (JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP11,
JP7, JP9, JP12)
14. Take out the mechanism.
15. Remove the two screws, stepping motor and stepping motor cover. (Cf. Fig. 4.9)
16. Remove the E ring and two gears.
Fig. 4.15 Location of E ring and Gears
17. Remove the E ring and the printer carriage release lever on the left side of the mechanism.
(Fig. 4.16)
18. Remove the E ring and the printer carriage release lever arm. (Fig. 4.17)
Thermal Head
Gear #1
E Ring
Gear #2
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Fig. 4.16 Printer carriage release lever and E ring
Fig. 4.17 Printer carriage release lever arm and E ring
19. Remove the teflon tube and metal rod. (Fig. 4.18)
20. Remove the E ring, the left side and right side platen bushes. (Fig. 4.19)
21. Remove the stripper plate.
Printer Carriage
Release Lever
Thermal Head
Bracket
E Ring
Teflon Tube
Printer Carriage
Release Lever
Arm
Stripper Plate
Platen Bush
(Right Side)
E Ring
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Fig. 4.18 Teflon tube and metal rod
Fig. 4.19 Remove E ring and platen bush
22. Move the platen a bit to the right of the mechanism, take out the platen.
23. Replace the platen and reassemble the removed parts in the reverse order of removal.
Teflon Tube
E Ring
Platen Bush
(Left Side)
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4.11 Head-Up Sensor Replacement
1. Remove the four screws with an electric screwdriver
1. Take out the ribbon mechanism, place it on the right side
2. Remove the screws on either side with an electric screw driver
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2. Lay a piece of cloth under the printhead
2. Remove the 2 printhead spring blade fixing screws
3. Pry off the left and right bushes with a flat screw
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2. Pry off the torsion springs on either side
4. Press the torsion spring, lift main mechanism cover with fingers
4. Press the cover with the thumb, pull up- and forward with the fingers
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5. Place printhead on the cloth with the cover facing up
5. Remove the screw and touch spring with a cross screwdriver
6. Replace and fix the 1.7*3 tap screw and compression spring in place
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7. Loosen the 3 M3*6 screws on the printhead bracket
8. Take out the printhead bracket, remove the spring blade
8. Replace the printhead bracket, put back the spring blade
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9. Fasten the M3*6 ground wire screw with 2 washers, then lock the M3*6 TPH screw
10. Press on one end of the torsion spring with both thumbs,
fit in the main mechanism upper cover with both indes fingers
11. Insert bushes on etiher side tentatively
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11. Press down with both thumbs, fit in the bushes with both index fingers
11. Align printhead bracket spring blade with the tenons ofupper cover, fit the two together
11. Fix the two in place with 2 2.6*12 screws, adjust the height of the screw
so that the screw head is level with the screw hole
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12. Fix in place with 2 3*15 screws
12. Place ribbon mechanism on main mechanism, fix it in place with 4 3*8 screws
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4.12 Parts List
•
Cover and Panels
Ref.
No.
Part No. Description Remarks List Price
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
1-9
1-10
1-11
1-12
1-13
1-14
1-15
1-16
1-17
1-18
1-19
1-20
1-21
37-1403008-34
30-0130050-00
98-0130057-00
98-0181009-00
98-0181010-00
98-0181011-00
98-0181012-00
30-0130059-00
30-0130048-00
30-0130060-00
30-0180043-00
98-0180065-00
37-1403006-34
98-0180071-00
98-0180016-00
37-1402005-31
98-0130055-00
98-0130069-00
98-0180060-00
52-0300021-21
32-0130015-00
30-0130041-00
80-ULN2003-00
80-PBL3717-00
82-029C040-00
Screw, φ3x8
Memory Module Cover
Push Botton Box Ass’ y
1 MB Memory Module
2 MB Memory Module
3 MB Memory Module
4 MB Memory Module
Label Roller (Hub shape: circular)
Label Roller (Hub shape: quadrangular)
Label Roller Fixed Tab
Label Roller Mount
Upper Cover Ass’ y
Screw, φ3x6 Tap4 Round+Ni
Main PCB-A Ass’ y
PCB-I Ass’ y
Screw, φ2x5
Front Cover Ass’ y
Cutter Module
Lower Cover Ass’ y
Screw, M3x6 Round + Ni
Hinge Shaft
Stopper
Cutter Driver IC
DC Motor, Stepping Motor Driver IC
Flash Memory
Option
Option
Option
Option
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‚
Ribbon Mechanism Assembly
Ref.
No.
Part No. Description Remarks List Price
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
98-0130019-10
98-0180009-10
37-1403005-32
37-1403008-34
37-1203510-31
30-0130014-10
98-0180011-10
37-1502604-34
37-1201705-24
98-0180015-10
36-0180002-00
Ribbon Spindle Ass’ y
Ribbon Mechanism Ass’ y
Screw, φ3x5 Tap4 Round + Black
Screw, φ3x8
Screw, φ3.5x10 Tap2 Round + Yellow
Ribbon Base Side Cover
DC motor Ass’ y
Screw, M2.6x4 Round + Ni
Screw, φ1.7x5 Tap2 Flat + Ni
PCB-F Ass’ y (ribbon rewind DC motor)
Felt Fabric
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ƒ
Mechanism Upper Cover Assembly
Ref.
No.
Part No. Description Remarks List Price
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
3-12
98-0180069-00
37-1403008-34
37-1202612-22
37-1503006-34
37-1403015-32
37-1403508-52
98-0180012-00
37-1201705-24
72-0050003-00
64-0010011-00
32-0130041-20
37-1201703-32
Mechanism Upper Cover Ass’ y
Screw, φ3x8
Screw, φ2.6x12 Tap4
Screw, M3x6 Round + Ni
Screw, φ3x15 Tap4 Round + Ni
Screw, φ3.5x8
PCB-G Ass’ y (Ribbon sensor)
Screw, φ1.7x5 Tap2 Flat + Ni
Flat Cable
Thermal Head
TPH Head-Up Spring
Screw, φ1.7x3
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11
12
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„
Mechanism Lower Cover Assembly
Ref.
No.
Part No. Description Remarks List Price
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
98-0180070-00
98-0180013-00
65-0010005-00
37-1403008-34
37-1403006-74
36-0130002-00
30-0130053-10
98-0180014-00
37-1201705-24
36-0130001-40
37-1503004-14
Mechanism Lower Cover Ass’ y
PCB-D Ass’ y (Gap/Ribbon Sensor)
Stepping Motor
Screw, φ3x8
Screw, φ3x6 Tap4 Round/W + Ni
Damper
Printer Carriage Release Lever ( L)
PCB-E1 Ass’ y
Screw, φ1.7x5 Tap2 Flat + Ni
Platen
Screw M3x4
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B-443 Bar Code Printer
Service Manual
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B-443 Bar Code Printer
Service Manual
…
Accessories
Ref.
No.
Part No. Description Remarks List Price
5-1
5-2
5-3
5-5
72-0010001-00
98-0130050-00
62-0130003-01
36-0130038-00
Parallel Port Cable
External Label Roll Mount Ass’ y
Power Adapter
Print Head Cleaning Pen Option
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Service Manual
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Service Manual
5. TROUBLE SHOOTING
5.1 Error Messages
Syntax Error:
The command format is incorrect. Check user’ s manual to be sure.
The serial port setting is incorrect. Check DIP switch and reset the printer.
Out of Range:
Numeric input is too large to be processed.
The input string is too long to be stored.
The size of the text of bar code exceeds that of the label.
Download Error:
The format of the downloaded file is incorrect.
There is not enough memory to store the file.
Stack Overflow:
Program contains too complex mathematical expressions. Divide into several expressions.
There is too much nested routine.
Memory Error:
Too many variables defined.
RS-232 Error:
The serial port setting is incorrect.
File Not Found:
Cannot open the file specified. Download the file again.
Type Mismatch:
Variable type mismatch.
Gap Not Found:
Cannot detect label edge. Calibrate the backing paper again.
Clock Access Error:
Can not read from/write to the clock.
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5.2 Trouble Shooting
Problems Solutions
1. Ribbon does not advance. Check the printing mode setting and reset the
printer.
2. Poor print quality. Clean the print head.
Adjust the print density setting.
3. Only prints diagonal pattern in the self-test. Ribbon and paper are incompatible. Use a different
type of ribbon.
4. Power indicator light does not illuminate. Check the connection of serial port cable.
5. On-line indicator light does not to illuminate. Check the DIP switch setting and reset the printer.
Check that power cord is properly connected.
6. Error indicator remains illuminated. Out of paper or out of ribbon.
Check the DIP switch setting
Check the paper core, make sure it is installed on
the ribbon rewind spindle.
Press the FEED key. The error message will be
printed out on the print media or sent out through
RS-232 port.
If there is no problem with direct thermal printing,
but error occurs in thermal transfer printing. Please
check the encoder of the DC motor.
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5.3 Calibrate the Gap Register
1. Install the label.
2. Turn on the printer power while pressing the PAUSE button. The printer will calibrate the
transparency of the backing paper and adjust the gap register.
5.4 Self-test
1. Install the label.
2. Turn on the printer power while pressing the FEED button, the printer will:
(1) Print head checking pattern.
(2) Calibrate the label length.
(3) Print internal settings.
(4) Initiate self-test.
(5) Enter dump mode.
5.5 Ram Clear
Press the PAUSE and FEED button simultaneously for more than 3 seconds. The printer will clear
the memory and reset the printer.
Be sure to calibrate the gap register with blank label before printing.
5.6 Diagnosis Operation Procedure
When the power is turned on without any button pressed, self diagnosis is performed automatically to
test the available memory. If any error occurs during this period, the ERR light will flash.
Do the self test and inspect the test pattern to check if the thermal head is available.
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5.7 Testing Sensors
A. Checking Ribbon Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to
PIN2 of JP2.
1. When ribbon is detected between TX and RX of the ribbon sensor, the measured voltage
should be 5 Vdc.
2. When ribbon is not detected between TX and RX of the ribbon sensor, the measured voltage
should be 0 Vdc.
The ribbon sensor is normal if the checking complies with the two cases above. Or else, the
ribbon sensor is out of order.
B. Checking DC Motor Encoder Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to
PIN2 of JP6.
1. When gap of the gear box is detected by the DC motor encoder sensor, the measured
voltage should be 5 Vdc.
2. When gap of the gear box is not detected by the DC motor encoder sensor, the measured
voltage should be 0 Vdc.
The DC motor encoder sensor is normal if the checking complies with the two cases above. Or
else, the DC motor encoder sensor is out of order.
C. Checking Gap Sensor
Do gap calibration first by holding the Pause button and activating the printer power at the same
time. If the calibration result is correct, go on and check the gap sensor. Switch the multimeter to
the DC gear. Connect the black wire to DC GND, and the red wire to PIN2 of JP5. Load label on
the printer.
1. When gap (backing paper only) is detected between TX and RX of the gap sensor, the
measured voltage should be 0 Vdc.
2. When gap (backing paper only) is not detected between TX and RX of the gap sensor, the
measured voltage should be 5 Vdc.
The gap sensor is normal if the checking complies with the two cases above. Or else, the gap
sensor is out of order.
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D. Checking Black Line Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to
PIN2 of JP4. Load black line label on the printer.
1. When black line is detected by the black line sensor, the measured voltage should be 5 Vdc.
2. When black line is not detected by the black line sensor, the measured voltage should be 0
Vdc.
The black line sensor is normal if the checking complies with the two cases above. Or else, the
black line sensor is out of order.
E. Checking Peel Off Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red wire to
PIN6 of JP3.
1. When label is detected by the peel off sensor, the measured voltage should be 0 Vdc.
2. When label is not detected by the peel off sensor, the measured voltage should be 5 Vdc.
The peel off sensor is normal if the checking complies with the two cases above. Or else, the
peel off sensor is out of order.
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5.8 Cleaning the Print Head
The printer should be cleaned regularly to retain high quality and optimum performance. The
greater the usage of the printer, the more frequent the cleaning.
1. Turn the power off
2. Open the printer cover.
3. Open the printer carriage by pulling up the release lever to the left of the front rubber roller.
4. Remove the ribbon and label.
5. Clean the print head element with a head cleaner pen.
6. Clean the front rubber roller with a piece of alcohol moistened cloth.
Precaution
This service manual is intended for use by service technicians, and designed as a guide for repair
& maintenance. The manual is intended to promote smooth service operations of the product in
the market place. It is not intended for any other purpose such as development or product
specifications. For questions regarding development or product specifications, please contact
directly to the TAIWAN SEMICONDUCTOR.
This manual may be changed or revised without notice. If you find any misprints or omissions,
please contact directly to the TAIWAN SEMICONDUCTOR promptly. (Facsimile No. +886-22912-2499)
TOSHIBA TEC and T AIW AN SEMICONDUCTOR cannot be held responsible for any trouble which
have been caused by misprints or omissions.
Safety Summary
Personal safety in handling or maintaining the equipment is extremely important. Warnings and
Cautions necessary for safe handling are included in this manual. All warnings and cautions
contained in this manual and written inside or outside of the printer should be read and understood
before handling or maintaining the equipment.
Never modify the machine. Except for the addition of options as specifically provided for in the
service manual, change or modifications to the machine are not approved. Unauthorized changes
or modifications may not comply with your country's safety standards.
Safety Precaution
Electrical equipment is dangerous. Electrical shock from such equipment can cause death. Never
operate electrical equipment unless authorized to do so by a responsible authority.
In emergency work on electrical equipment is authorized, be sure that it is performed in strict
compliance with approved safety regulations.
The following safety precautions will help to ensure proper use of the printer:
• Turn off the printer before 1) opening the top cover for any reason, 2) attaching/detaching
any cable and memory cards, and 3) changing the dip switch setting.
• Disconnect the power cord whenever you are working inside the printer.
• Keep your work environment static free.
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