Citizen BD2-3880 User manual

CONTROL BOARD FOR MLT-388/MLT-389
MODEL BD2-3880/3890
Rev. 1.00 Newly Issued on October 22, 2004
User’s Manual

i
REVISION
Rev. No. Date Content
1.00 2003.06.23 Issued as first edition.
1.00 2004.10.22 “3.3 CN3 Connector for Interface” changed

ii
CONTENTS
1. OUTLINE ....................................................................................................................... 1
1.1 Features ............................................................................................................................................................ 1
1.2 Precaution ......................................................................................................................................................... 1
2. BASIC SPECIFICATIONS .......................................................................................... 2
2.1 Model Classification ......................................................................................................................................... 2
2.2 Basic Specifications.......................................................................................................................................... 3
3. CONNECTING CONNECTORS................................................................................. 4
3.1 CN1 Connector for Printer Mechanism............................................................................................................ 4
3.2 CN2 Connector for Print Mechanism ............................................................................................................... 5
3.3 CN3 Connector for Interface ............................................................................................................................ 6
3.4 CN201 Connector for Paper Cutter (Option) ................................................................................................... 7
4. SELECTING FUNCTIONS ......................................................................................... 8
5. POWER SUPPLY ........................................................................................................ 10
5.1 Specifications ................................................................................................................................................. 10
5.2 Precautions ..................................................................................................................................................... 10
6. PARALLEL INTERFACE .......................................................................................... 11
6.1 Specifications ................................................................................................................................................. 11
6.2 Explanation of Input/Output Signals .............................................................................................................. 11
6.3 Electrical Characteristics ................................................................................................................................ 12
6.4 Timing Chart (Compatibility Mode) .............................................................................................................. 13
6.5 Data Receiving Control .................................................................................................................................. 13
6.6 Buffering......................................................................................................................................................... 13
7. SERIAL INTERFACE ................................................................................................ 14
7.1 Specifications ................................................................................................................................................. 14
7.2 Explanation of Input/Output Signals .............................................................................................................. 15
7.3 Error Detection ............................................................................................................................................... 15
7.4 Data Receiving Control .................................................................................................................................. 16
7.5 Buffering......................................................................................................................................................... 16
7.6 Electrical Characteristics ................................................................................................................................ 16

iii
8. ERROR HANDLING .................................................................................................. 17
8.1 Peripheral Circuit Errors ................................................................................................................................ 17
8.2 Operation Errors ............................................................................................................................................. 18
8.3 Error Indication .............................................................................................................................................. 19
9. PRINTER MECHANISM CONTROL SYSTEM .................................................... 20
9.1 Thermal Head Control System ....................................................................................................................... 20
9.1.1 Fixed Division Number System ................................................................................................................ 20
9.1.2 Variable Division Number System ............................................................................................................ 20
9.2 Motor Drive .................................................................................................................................................... 21
9.2.1 Motor Drive Features ................................................................................................................................ 21
9.2.2 Maximum Motor Drive Speed at Major Voltage ....................................................................................... 21
10. MAINTENANCE AND SERVICE ........................................................................... 22
APPENDIX 1. BLOCK DIAGRAM .............................................................................. 23
APPENDIX 2. OUTER DIMENSION ........................................................................... 24

BD2-3880/3890 User’s Manual
1
1. OUTLINE
This control boards is designed to be used to control our thermal printer, “MLT-388/389” series
through the computer etc.
As being provided with many abundant functions, it can be used widely in various applications.
Before you start using it, read this manual thoroughly and understand the content.
1.1 Features
(1) Ultra compact
(2) Both interface of Serial and Parallel can be selected by dip switch.
(3) Input buffer incorporated.
(4) Bar code printing is available (dedicated command).
(5) Auto paper cutter control incorporated (option).
(6) User-defined character registration function (94 characters)
(7) Low cost
1.2 Precaution
(1) Make sure to turn OFF the power supply in case of connecting/disconnecting the connectors.
(2) Absolutely do not make a short circuit between the terminals of connectors.
(3) Use power supply, LED, interface, etc. following their specifications.
(4) Use the recommended paper shown below.
• Thermal Paper TF50KS-E2D (Nippon paper)
KF50-HDA (Shin-Oji paper)
F220VP (Mitsubishi paper) or the equivalent

BD2-3880/3890 User’s Manual
2
2. BASIC SPECIFICATIONS
2.1 Model Classification
Models are identified by the following coding scheme:
BD2 - 3890 U C
Character Set
U : Internatiomal model
Model Name of applied printer mechanism
3880 : For MLT-388
3890 : For MLT-389
Model Name
Auto Cutter Drive
C : With auto cutter function
None : Without auto cutter function
* Printer model is specified by J8 (jumper).

BD2-3880/3890 User’s Manual
3
2.2 Basic Specifications
Printing system
Print width
Print Speed
Number of columns
Character dimensions
Character types
Bar code type
Line pitch
Interface
Input buffer
Supply voltage
Weight
Outer Dimension
Operating temperature
and humidity
Storage temperature and
humidity
Thermosensitive dot-matrix printing
72 mm/576 dots
7.2V: Approx. 60 mm/s within 64 dots, at 35°C or more
5V: Approx. 30 mm/s within 64 dots, at 63°C or more
Font A : 48 columns
Font B : 64 columns
Font A : 1.25 mm ×3.00 mm
Font B : 0.88 mm ×3.00 mm
Alphanumeric, international characters
UPC-A/E, JAN (EAN) 13/8 columns, ITF, CODE 39, CODE128, CODABAR
4.23 mm (Can be changed by command)
Serial (Conforms to RS-232C) or Parallel (Conforms to Centronics)
(Selectable by dip switch)
2 K bytes
Logic part: 5V ±5%
Drive unit: 4.2V ~ 8.5V
Approx. 40 g
80 mm (W) ×90 mm (D) (For height of component parts, see outer drawing.)
5 ~ 40˚C , 35 ~ 85% RH (with no dew condensation)
–20 ~ 60˚C , 10 ~ 90% RH (with no dew condensation)
Items Contents
Approx. 130 mA (At ANK slide printing)
Average: 1.5A (Peak: Approx. 4A)
Operating votage is 7.2 V (Max)
8.5 V is a voltage only right after charging.
8.5V cannnot be used for normal voltage.

BD2-3880/3890 User’s Manual
4
3. CONNECTING CONNECTORS
3.1 CN1 Connector for Printer Mechanism
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
VH
VH
SI
GND
TM
nSTRB 1
nSTRB 2
nSTRB 3
VDD
nLATCH
GND
nSTRB 9
CP
GND
nSTRB 8
nSTRB 4
nSTRB 5
nSTRB 6
GND
nSTRB 7
GND
GND
GND
VH
VH
VH
VH
VH
––
––
Output
––
Input
Output
Output
Output
––
Output
––
Output
Output
––
Output
Output
Output
Output
––
Output
––
––
––
––
––
––
––
––
Function
Power for print head
Power for print head
Head data output signal
GND
Thermistor
Strobe 1
Strobe 2
Strobe 3
Thermal head logics power (+5V)
Latch signal
GND
Strobe 9
Clock pulse
GND
Strobe 8
Strobe 4
Strobe 5
Strobe 6
GND
Strobe 7
GND
GND
GND
Power for print head
Power for print head
Power for print head
Power for print head
Power for print head
Pin No. Signal Name I/O
Applicable Connector: 52806-2810 (Molex)
* First “n” of si
g
nal name indicates “L” active si
g
nal.

BD2-3880/3890 User’s Manual
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3.2 CN2 Connector for Print Mechanism
1
2
3
4
5
6
7
8
9
MOTOR B
MOTOR A
MOTOR B
MOTOR A
PE C
GND
PE A
H-UP
GND
Output
Output
Output
Output
Input
––
––
Input
––
Function
Operation signal for motor B
Operation signal for motor A
Operation signal for motor B
Operation signal for motor A
Photointerruptor collector (Paper sensor)
Photointerruptor emitter + cathode
Photointerruptor anode (Paper sensor)
Platen not mounted signal (MLT-389)
Head-up signal (MLT-388)
Head-up sensor GND
Pin No. Signal Name I/O
A
pp
licable Connector: 53047-0910
(
Molex
)

BD2-3880/3890 User’s Manual
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3.3 CN3 Connector for Interface
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
VDD
VDD
GND
GND
VP
VP
VP
VP
VP
VP
P-GND
P-GND
P-GND
P-GND
P-GND
P-GND
LF-SW
ERROR
PEout
DTR
TXD
RXD
DSR
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
nSTB
BUSY
nFAULT
SELECT
PE
nACK
NC
NC
nRESET
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
––
Input
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Output
Output
Output
Output
Output
––
––
Input
Function
Power supply for circuit (5V)
Power supply for circuit (5V)
GND
GND
Power supply for operation
Power supply for operation
Power supply for operation
Power supply for operation
Power supply for operation
Power supply for operation
GND for operation
GND for operation
GND for operation
GND for operation
GND for operation
GND for operation
LF Switch input
ERROR LED output (Can be connected directly)
PE LED output (Can be connected directly)
Serial Interface DTR
Serial Interface TXD
Serial Interface RXD
Serial Interface DSR
Parallel Interface DATA0
Parallel Interface DATA1
Parallel Interface DATA2
Parallel Interface DATA3
Parallel Interface DATA4
Parallel Interface DATA5
Parallel Interface DATA6
Parallel Interface DATA7
Parallel Interface nSTB
Parallel Interface BUSY
Parallel Interface nFAULT
Parallel Interface SELECT
Parallel Interface PE
Parallel Interface nACK
No Connection
No Connection
Parallel Interface nRESET
Pin No. Signal Name I/O
Applicable Connector: 53313 - 4015 (Molex)
* First “n” of si
g
nal name indicates “L” active si
g
nal.