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THERMAL TRANSFER BAR CODE PRINTER
TTP-244 Plus
Service
Manual
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TTP-244 Plus Bar Code
Printer Service Manual
Table of Contents
1. FUNDAMENTALS ABOUT THE SYSTEM .................................................................. 1
1.1 Features of the TTP/TDP-244 Plus ............................................................................ 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 ................................................................................................ ..... 5
1.6 Available Bar Codes ................................................................................................... 5
1.7 Various Sensors ......................................................................................................... 6
2. SUPPLY SPECIFICATIONS ............................................................................................. 8
2.1 Types of Paper ........................................................................................................... 8
2.2 Specifications ................................................................ ............................................. 8
2.3 Ribbon Sizes and Shapes ........................................................................................ 10
3. ELECTRONICS .............................................................................................................. 11
3.1 Summary of Board Connectors ................................................................................ 11
3.2 Pin Configuration ...................................................................................................... 13
4. MECHANISM .................................................................................................................. 15
4.1 Mainboard Replacement ........................................................................................... 15
4.2 DC Motor Replacement ............................................................................................ 17
4.3 Print Head Replacement .......................................................................................... 21
4.4 Ribbon Rewind Spindle Encoder Replacement ........................................................ 23
4.5 Felt Fabric Replacement .......................................................................................... 24
4.6 Stepping Motor Replacement ................................................................................... 26
4.7 Black Mark Sensor / Gap Sensor (Receiver) Replacement ...................................... 27
4.8 Ribbon Sensor (Receiver) Replacement ................................................................... 28
4.9 Ribbon Sensor (Transmitter) / Gap Sensor (Transmitter) Replacement ................... 30
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4.10 Platen Replacement ............................................................................................... 31
5. TROUBLE SHOOTING ................................................................................................... 33
5.1 Trouble Shooting ...................................................................................................... 33
5.2 Calibrate the Gap Register ....................................................................................... 34
5.3 Self-test .................................................................................................................... 34
5.4 Ram Clear ................................................................................................................ 34
5.5 Diagnosis Operation Procedure ................................................................................ 34
5.6 Testing Sensors ....................................................................................................... 35
UPDATE HISTORY ............................................................................................................ 36
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TTP-244 Plus Bar Code
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1. FUNDAMENTALS ABOUT THE SYSTEM
1.1 Features of the TTP/TDP-244 Plus
1. TTP-244 Plus bar code printer prints bar codes, characters, logos, on various types of labels
and tickets by direct thermal or thermal transfer printing.
2 TTP-244 Plus adopts a “BASIC-like” high level programming language to help users
programme the desired label forms with ease.
3. TTP-244 Plus bar code printer can be connected to a personal computer or an optional LCD
keyboard to execute the programs downloaded in the printer’s memory. The printer is
equipped with the following standard devices:gap transmissive sensor, black mark reflective
sensor and ribbon end sensor.
4. TTP-244 Plus bar code printer provides a selection of optional features, including portable LCD
keyboard, etc.
1.2 Model Naming Syntax
T T P – 2 4 4 Plus
(1) (2) (3) (4)
(1) Print method:
TTP – Thermal Transfer Printing
TDP – Thermal Direct Printing
(2) Resolution of print head (DPI)
(3) Maximum print width (Inch)
(4) Maximum print speed (Inch/Sec)
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1.3 Overview
1.3.1 Front View
Label Dispense
Opening
Cover Release Button
Top Cover
FEED Button
PAUSE Button PAUSE Button
PWR., ON-LINE
and ERR.
Indicators
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1.3.2 Rear View
Power Supply
Connector
RS-232 Interface
Connector
USB Interface
Connector
Label Insert
Opening (for use
with external
labels)
Power On/Off
Switch
Centronics Interface
Connector (Option)
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1.4 Basic Specifications
Thermal transfer and direct thermal printing
High dot density printing (203 dots/inch)
Selectable print speeds at 2.0”, 3.0” or 4.0” per second
Supports RS-232 and USB interface
Maximum media width up to 4.49” (114 mm)
Adjustable label edge guide
International character sets
Print area is 4.09”W x 40”L (without any file downloaded in the printer memory)
User selectable bar code ratios and heights
Prints on labels or tickets
Equipped with black mark sensor
Label stock and thermal transfer ribbon are easy to install
Internal label print counter
Self test and hex dump mode
Downloadable fonts from label design software
Electronics/Communication Specifications
Electrical
DC Motor: DC24V
Memory:
─DRAM: 8 Mb
─Flash: 2 Mb
Adapter 100~240VAC10%, 50~60Hz
Regulations: FCC Class A, CE Class A, C-Tick Class A, TÜ V/GS, CCC
Communications Interface:
* RS-232/USB
* RS-232/Centronics (factory option)
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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
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
1D bar code:
Code 39
Code 93
Code 128 UCC
Code 128, Subsets A, B, and C
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Codabar
Interleaved 2 of 5
EAN-8, EAN-13, EAN-128
UPC-A, UPC-E
EAN and UPC with 2 or 5 digits add-on
MSI
Postnet
Plessey
China POST
2D bar codes:
Maxicode
DataMatrix
PDF-417
QR code
1.7 Various Sensors
Feed Gap Sensor
The feed gap sensor detects a 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.
In case of Label
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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In case of Ticket
The default sensor position is (1) as shown on 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.
Ribbon End Sensor
The sensor detects the end portion of the ribbon. The ribbon end must be transparent.
Label End Sensor
The sensor detects the end portion of the label.
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 TTP-244 Plus: label and ticket.
In TTP-244 Plus, 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
Paper Width
Max.114mm
Min. 25.4mm
Length (Pitch)
10～1016mm
Paper
Thickness
0.25 mm
Paper Weight
Max 240 g/m2
Max. Roll
Diameter
(1” core)
Inner roll diameter. Max 4.3” (110mm)
External roll diameter. Max 8.4”
(214mm)
Roll Up Method
Print surface wound outside as
standard
Paper Core ID.
25.7±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). Paper shape is as shown on next page:
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2.3 Ribbon Sizes and Shapes
Item
Specifications
Ribbon shape
Spool type
Ribbon width
Max. 110mm
Min. 40mm
Ribbon winding width
Max. 110mm
Min. 40mm
Leading tape
Polyester film, 3355mm long
End tape
Polyester film (transparent), 2505mm
long
Max. ribbon OD.
67mm
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.
t4
)d(D
= L
22
, where
L = Ribbon length
D = Max. roll diameter
d = Ribbon core outside diameter
t = Ribbon thickness
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3. ELECTRONICS
3.1 Summary of Board Connectors
Main board
Connector
Description
Remark
1
Ribbon sensor connector
JP18
2
Black mark sensor connector
JP46
Pin
Description
Voltage
1
Power
5V
2
Black mark
sensor receiver
No paper or black mark : 3.1~3.2V
Detect paper: 0~0.3V
3
GND
0V
1
2
3
9
6
7
12
8
4
10
13
5
14
11
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3
Gap sensor connector
JP53
Pin
Description
Voltage
1
GND
0V
2
Gap sensor emitter
Emitter on : 0.7~1.8V
Emitter off: 2.4~2.7V
3
Power
5V 4 GND
0V
5
Gap sensor receiver
No paper or gap: 3.1~3.2V
Detect paper: 0~0.3V
6
Power
5V
4
Ribbon encoder sensor & DC motor connector
JP37
5
Stepping motor connector
JP14
6
Print head connector
JP42
7
SD memory card module connector
JP44
8
Micro processor
U2
9
Power switch
SW2
10
Power supply output (24V DC) connector
B3
11
RS-232C connector
JP7
12
Centronics port connector (Option)
JP4
13
USB connector
JP9
14
Push button connector
JP52
Pin
Description
Voltage
1
LED green (PWR)
LED light on: 2.0~2.2V
LED light off: 0~0.3V
2
LED green (ONLINE)
LED light on: 2.0~2.2V
LED light off: 0~0.3V
3
LED red (ERR)
LED light on : 2.0~2.2V
LED light off: 0~0.3V
4
Pause switch
0V: Push key
3.3V: Stand-by
5
Feed switch
0V: Push key
3.3V: Stand-by
6
GND
0V
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3.2 Pin Configuration
RS-232C
PIN
CONFIGURATION
1
+5 V
2
TXD
3
RXD
4
CTS
5
GND
6
RTS
7
N/C
8
RTS
9
N/C
USB
PIN
CONFIGURATION
1
N/C 2 D- 3 D+
4
GND
Centronics
Pin
SPP Mode
Nibble
In/Out
Function
1
Strobe
N/A
In
A low on this line indicates that there are valid data
at the host. When this pin is de-asserted, the +ve
clock edge should be used to shift the data into the
device.
2-9
Data 0-7
N/A
In
Data Bus. Single-directional.
10
Ack
N/A
Out
A low on this line indicates that there are valid data
at the Device. When this pin is de-asserted, the
+ve clock edge should be used to shift the data into
the host.
11
Busy
N/A
Out
When in reverse direction, a high indicates data,
while a low indicates a command cycle. In forward
direction, it functions as PtrBusy.
12
Paper Out /
End
N/A
Out
When low, device acknowledges reverse request.
13
Select
N/A
Out
Extensibility flag
14
Ground
N/A
GND
15
No Defined
N/A
N/A
16-17
Ground
N/A
GND
Ground
18
No Defined
N/A
N/A
19-30
Ground
N/A
GND
Ground
31
No Defined
N/A
N/A
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32
Error / Fault
N/A
Out
A low set by the device indicates that the reverse
data is available
33-35
Ground
N/A
GND
Ground
36
No Defined
N/A
N/A
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4. MECHANISM
4.1 Mainboard Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or USB port cable.
3. Open the top cover of the printer.
4. Remove the four screws of the internal label roll mount.
Remove screws of the label roll mount
5. Move the mechanism about 5 mm in the label feed direction.
6. Take out the internal label roll mount.
Internal label
roll mount
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7. Remove all connectors on the main board.
Remark
Description
JP52
Push button connector
JP37
Ribbon encoder sensor & DC motor connector
JP14
Stepping motor connector
JP53
Gap sensor connector
JP46
BLine sensor connector
JP18
Ribbon sensor connector
JP42
Print head connector
8. Remove the screw of ground wire on the main board.
9. Remove the rest three screws on the mainboard.
10. Replace the mainboard.
11. Reassemble the internal label roll mount in the reverse procedures of the removal.
Ground Wire
JP52
JP14
JP53
JP37
JP46
JP18
JP42
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4.2 DC Motor Replacement
1. Turn off the printer power.
2. Remove the power cord and RS-232 and/or USB port cable.
3. Open the top cover of the printer.
4. Remove the printer front panel.
5. Remove the screws in the lower left, lower right corners of the main mechanism.
6. Remove all four screws of the internal label roll mount.
Screws
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7. Move the mechanism in the label feed direction about 5 mm.
8. Take out the internal label roll mount and remove connectors as below.
9. Remove the screw of ground wire on the mainboard.
10. Take out the mechanism.
Ground Wire
JP14
JP53
JP37
JP46
JP18
JP42
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11. Remove the one screw.
12. Remove the three screws on DC motor fixture.
13. Remove the three screws used to fix DC motor on the fixture and remove the cable tie.
Screw
DC Motor
fixture
Screws
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14. Replace the DC motor and pull out the cables in connector JP 37.
Note: The colors of DC motor wires in connector JP 37 are yellow (outside) and green
(inside).
15. Reassemble the removed parts in the reverse order of the removal.
Screws
Cable tie
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4.3 Print Head Replacement
1. Follow the instructions in Section 4.2 to take out the mechanism.
2. Open the print carriage.
3. Remove the screws, springs and spring bushing on both sides of the mechanism.
Note: The left side spring and the right side spring are different in shape. The right
side spring has a straight end, when the left side spring has an end that is
curved 90 degrees.
4. The main mechanism is divided into upper mechanism and lower mechanism.
5. Disconnect the print head cables.
6. Remove the e-ring at the mechanism, as shown.
7. Remove the screws.
E-ring
Screws
Spring bushing
Spring
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8. Resplace the print head.
9. Reassemble the removed parts in the reverse order of removal.
Note:
1. Tidy up the cable so that it does not protrude or interfere with the ribbon.
2. Do not touch the elements of the print head.
3. Do not disassemble the print head.
Screws
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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
is 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 4.2 to remove DC motor and DC motor fixture.
2. Remove the two flat tap screws and cable tie.
3. Replace the Encoder PCB.
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 can not be tightened when
label back feeds during printing, please replace with a new felt to secure the best
printing quality. Follow the steps below to replace the felt fabric.
1. Follow the instructions in Section 4.2 to remove DC motor and DC motor fixture.
2. Remove the E-ring and washer on ribbon supply spindle.
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.
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.
Front View of the
Ribbon Supply Spindle
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4.6 Stepping Motor Replacement
1. Follow the instructions in Section 4.2 to take out the mechanism.
2. Remove the two screws on stepping motor fixture.
3. Replace the stepping motor and reassemble the removed parts in the reverse order of removal.
Screws
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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
multi-meter is used to measure the signal of Pin2 to see if there is voltage variation
when black mark is detected. Before conducting the test, please issue 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. Follow the instructions in Section 4.2 to take out the mechanism.
2. Remove two flat tap screws and black mark sensor PCB.
3. Reassemble the removed parts in the reverse order of removal.
Screws
Black mark
sensor PCB
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4.8 Ribbon Sensor (Receiver) Replacement
1. Follow the instructions in Section 4.2 to take out the mechanism.
2. Open the print carriage.
3. Remove the screws, springs and spring bushing on both sides of the mechanism.
Note: The left side spring and the right side spring are different in shape. The right
side spring has a straight end, when the left side spring has an end that is
curved 90 degrees.
4. The main mechanism is divided into upper mechanism and lower mechanism.
5. And ribbon sensor (receiver) is located in the upper mechanism. Remove the screws on the
ribbon sensor cover.
Screws
Spring bushing
Spring
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6. Replace with a new ribbon sensor PCB.
7. Reassemble the removed parts in the reverse order of removal.
Sensor Cover
Ribbon sensor PCB
Flat Tap Screw
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4.9 Ribbon Sensor (Transmitter) / Gap Sensor (Transmitter) Replacement
1. Please follow the steps in Section 4.8 to separate the upper mechanism from the lower
mechanism.
2. The ribbon sensor (transmitter) is located in the center of the lower mechanism.
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.
Ribbon sensor
(transmitter) PCB
Screws
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4.10 Platen Replacement
1. Follow the instructions in Section 4.6 to remove the stepping motor fixture and stepping motor.
2. Remove the E-ring and two gears.
3. Remove the E ring and the printer carriage release lever arm.
4. Remove the E-ring and the printer carriage release lever on the left side of the mechanism.
Printer Carriage
Release Lever
E-ring
Thermal Head
Gear #1
E-ring
Gear #2
Printer Carriage
Release lever arm
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5. Remove the teflon tube and stripper rod.
6. Remove the E ring, the right side and left side platen bushes.
7. Move the platen to the right of the mechanism.
8. Replace the platen and reassemble the removed parts in the reverse order of removal.
Teflon Tube
Platen bush (Left side)
E-ring
Platen
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5. TROUBLE SHOOTING
5.1 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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5.2 Calibrate the Gap Register
Install the label.
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.
5.3 Self-test
Install the label.
Turn on the printer power while pressing the FEED button, the printer will:
Print head checking pattern.
Calibrate the label length.
Print internal settings.
Initiate self-test.
Enter dump mode.
5.4 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.
5.5 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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5.6 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 JP18.
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 PIN4 of U35.
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 Black Line Sensor
Switch the multimeter to the DC gear. Connect the black wire to DC GND, and the red
wire to PIN2 of U2. Load black line label on the printer.
1. When black line is detected by the black line sensor, the measured voltage should
be 3 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.
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UPDATE HISTORY
Date
Content
Editor
2009/10/6
Modify section 3.1
Camille
2011/1/25
Modify TSC address
Camille
2011/4/7
Modify section 3.2
Camille
Page 40
Corporate Headquarters Li Ze Plant
9F., No.95, Minquan Rd., Xindian Dist., No.35, Sec. 2, Ligong 1st Rd., Wujie Township,
New Taipei City 23141, Taiwan (R.O.C.) Yilan County 26841, Taiwan (R.O.C.)
TEL: +886-2-2218-6789 TEL: +886-3-990-6677
FAX: +886-2-2218-5678 FAX: +886-3-990-5577
Web site: www.tscprinters.com
E-mail: [email protected]
TSC Auto ID Technology Co., Ltd.
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