TSC TTP-245C series User manual

TTP-245C / TTP-343C / TTP-244CE
SERVICE
MANUAL
THERMAL TRANSFER / DIRECT THERMAL
BAR CODE PRINTER

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TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
TABLE OF CONTENT
1. OVERVIEW................................................................................................................1
1.1 Front View ...............................................................................................................1
1.2 Interior View ............................................................................................................3
1.3 Rear View.................................................................................................................4
2. ELECTRONICS..........................................................................................................5
2.1 Summary of Board Connectors.............................................................................5
2.2 Pin Configuration....................................................................................................9
3. MECHANISM........................................................................................................... 11
3.1 Replacing Top Cover and Media View Window Cover.......................................11
3.2 Replacing the Lower Cover..................................................................................13
3.3 Replacing the Main Board....................................................................................14
3.4 Replacing the Platen Roller Assembly................................................................15
3.5 Replacing the Print Head Assembly....................................................................16
3.6 Replacing the Stepping Motor.............................................................................18
3.7 Replacing the Feed Button and Feed Button PCB.............................................19
3.8 Peel-off Module Installation (Option) ..................................................................20
3.9 Cutter Module Installation (Option).....................................................................22
4. TROUBLESHOOTING.............................................................................................24
4.1 LED Status.............................................................................................................24
4.2 Print Quality ..........................................................................................................25
5. MAINTENANCE.......................................................................................................27
UPDATE HISTORY......................................................................................................29

1
TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
1. OVERVIEW
1.1 Front View
1. Ribbon access cover
2. Top cover open lever
3. Media view window
4. LED indicator
5. Feed button
6. SD card socket
* Recommended SD card specification.
SD card spec
SD card capacity
Approved SD card manufacturer
V1.0, V1.1
128 MB
SanDisk, Transcend
V1.0, V1.1
256 MB
SanDisk, Transcend, Panasonic
V1.0, V1.1
512 MB
SanDisk, Transcend, Panasonic
V1.0, V1.1
1 GB
SanDisk, Transcend, Panasonic
V2.0 SDHC CLASS 4
4 GB
V2.0 SDHC CLASS 6
4 GB
SanDisk, Transcend, Panasonic
V1.0, V1.1
microSD 128 MB
Transcend, Panasonic
V1.0, V1.1
microSD 256 MB
Transcend, Panasonic
V1.0, V1.1
microSD 512 MB
Panasonic
1
2
6
3
4
5

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TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
V1.0, V1.1
microSD 1 GB
Transcend, Panasonic
V2.0 SDHC CLASS 4
microSD 4 GB
Panasonic
V2.0 SDHC CLASS 6
microSD 4 GB
Transcend
V1.0, V1.1
miniSD 128 MB
Transcend, Panasonic
V1.0, V1.1
miniSD 256 MB
Transcend, Panasonic
V1.0, V1.1
miniSD 512 MB
Transcend, Panasonic
V1.0, V1.1
miniSD 1 GB
Transcend, Panasonic
V2.0 SDHC CLASS 4
miniSD 4 GB
Transcend
V2.0 SDHC CLASS 6
miniSD 4 GB
- The DOS FAT file system is supported for the SD card.
- Folders/files stored in the SD card should be in the 8.3 filename format
- The miniSD/microSD card to SD card slot adapter is required.

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TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
1.2 Interior View
1. Ribbon rewind hub
2. Ribbon rewind gear
3. Gap sensor (receiver)
4. Media holder
5. Media holder lock switch
6. Gap sensor (transmitter)
7. Printhead
8. Ribbon supply hub
9. Top cover support
10. Media guide adjustment knob
11. Black mark sensor
12. Platen roller
9
11
10
5
4
3
8
7
1
2
12
6

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TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
1.3 Rear View
1. Ethernet interface
2. USB interface
3. Centronics interface
4. RS-232C interface
5. Power jack socket
6. Power switch
7. Fan-fold paper entrance chute
1
3
5
4
2
6
7

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Bar Code Printer Service Manual
5
2. ELECTRONICS
2.1 Summary of Board Connectors
Main board
Connector
Description
Remark
1
Power switch
SW1
2
Power supply output (24V DC) connector
B1
3
RS-232C connector
JP7
4
Centronics port connector
JP4
5
USB connector
JP9
6
Ethernet connector
JP3
7-1
7-2
1
2
3
4
5
6
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

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Bar Code Printer Service Manual
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7-1
Print head connector (TTP-343C)
JP12_1 & JP12_2
7-2
Print head connector (TTP-245C / 244CE)
JP30_1 & JP30_2
8
Micro processor
U2
9
5V DC connector
JP22
10
Buzzer (Factory option)
B2
11
RTC battery (Factory option)
BT1
12
SD card slot
JP2
13
Motor temp. thermistor connector
JP24
Pin
Description
Voltage
1
Motor temp thermistor AD
1.5~2.8V
2
GND
0V
14
Stepping motor connector
JP14
15
Cutter connector
JP35
Pin
Description
Voltage
1
Cutter power
24V
2
GND
0V
3
Cutter direction
0V: Cutter positive cut
5V: Cutter negative cut
4
Cutter enable
0V: Cutter work
5V: Cutter stop
5
Cutter position sensor switch
0V: Cutter stop
3.3V: Cutter work
6
GND
0V
7
Logic power
5V
8
Reserved
16
Feed key and LED connector
JP28
Pin
Description
Voltage
1
Power
3.3V
2
LED green
LED light on: 1.1~1.4V
LED light off: 1.6~1.9V
3
LED red
LED light on : 1.4~1.7V
LED light off: 1.8~2.1V
4
Feed switch
0V: Push key
3.3V: Stand-by
5
GND
0V

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
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17
Peel-off sensor connector
JP19
Pin
Description
Voltage
1
2
Reserved
3
Peel sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 2.6~2.8V
4
Peel sensor receiver AD
0~3.3V
5
GND
0V
18
Head open sensor connector
JP16
Pin
Description
Voltage
1
Power
3.3V
2
Head open sensor receiver
0~1.4V: Head close
1.7~3.3V: Head open
3
GND
0V
19
Gap sensor emitter connector
JP29
Pin
Description
Voltage
1
Power
3.3V
2
Gap sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 2.6~2.8V
20
Black mark sensor connector
JP17
Pin
Description
Voltage
1
Not use
2
Power
3.3V
3
Black mark sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 2.6~2.8V
4
Black mark sensor receiver AD
0~3.3V
5
Power
3.3V
21
Gap sensor receiver connector
JP34
Pin
Description
Voltage
1
Power
3.3V
2
Gap sensor receiver AD
0~3.3V
22
Ribbon encoder sensor connector
JP20
23
RFID module connector (Factory option)
JP38

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
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Main board bottom
Connector
Description
Remark
1
Firmware recover card connector
JP37
1

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
9
2.2 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

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
10
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
Ground
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
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
Ethernet
PIN
CONFIGURATION
1
Tx+
2
Tx-
3
Rx+
4
N/C
5
N/C
6
Rx-
7
N/C
8
N/C

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
11
3. MECHANISM
Please turn off the power switch and unplug the power adapter before replacing parts.
3.1 Replacing Top Cover and Media View Window Cover
1. Turn the printer upside down and use the Phillips screwdriver to remove the 4 screws from
hinge holder.
2. Open the printer top cover by pulling the top cover open lever located on each side
towards the front of the printer, then lift the top cover to the maximum open angle.
3. Use the Phillips screwdriver to remove the 6 screws from the top inner cover.
4. Use the slotted screwdriver to remove the 2 screws that hold the print head bracket.
Screws
Screws
Screws
Screws
Top cover

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Bar Code Printer Service Manual
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5. Disconnect the harness from the feed button PC board.
6. Remove/Replace the top cover and media view window cover.
7. Reassemble the parts in the reverse procedure.
Screws
Screws
Media view window
cover
Top cover

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Bar Code Printer Service Manual
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3.2 Replacing the Lower Cover
1. Turn the printer upside down and use the Phillips screwdriver to remove the 6 screws.
2. Remove/Replace the lower cover.
3. Reassemble the parts in the reverse procedure.
Screws
Screws

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
14
3.3 Replacing the Main Board
1. Refer to section 3.2 to remove the lower cover.
2. Remove 1 screw from the main board.
3. Disconnect all connectors from the main board.
4. Use the Phillips screwdriver to remove the 2 screws and use socket wrench to remove the
2 bolts.
5. Then take off the interface plate and black Mylar. Remove/Replace the main board.
6. Reassemble the parts in the reverse procedures.
Main board
Screws
Bolts
Screws
Interface plate

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
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3.4 Replacing the Platen Roller Assembly
1. Open the printer top cover by pulling the green tabs located on each side towards the front
of the printer, then lift the top cover to the maximum open angle.
2. Disengage the platen holder tabs to the lower inner cover by pulling out the right side and
left side tabs toward the center of platen and rotates 90 degrees.
4. Take out the platen roller assembly and replace a new platen roller assembly.
5. Reassemble the parts in the reverse procedures.
Platen roller assembly
Tab
Unhook

TTP-245C/ TTP-343C/ TTP-244CE
Bar Code Printer Service Manual
16
3.5 Replacing the Print Head Assembly
1. Open the printer top cover by pulling the top cover open levers located on each side
towards the front of the printer, then lift the top cover to the maximum open angle. Open
the ribbon access cover.
2. Use the slotted screwdriver to remove the 2 screws that hold the print head bracket. Let
print head bracket drops into its place.
3. Use the slotted screwdriver to remove 2 screws that fix the print head spring plate.
4. Pull the print head module forward to take out the module and disconnect the print head
harness. Replace the print head assembly.
Screws
Screws
Screws
Screws
Print head
assembly

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Bar Code Printer Service Manual
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5. Remove the print head harness cover.
6. Connect the print head harness and carefully insert the print head module spring plate into
the ribbon base print head spring plate slot.
Note: There is static brush adhered on the print head spring plate. The static brush
free end side is toward the paper feed direction.
7. Make sure the TPH bracket hinge slots are engaged with the hinges at both sides.
8. Reassemble the parts in the reverse procedures.
Print head
harness cover

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Bar Code Printer Service Manual
18
3.6 Replacing the Stepping Motor
1. Refer to section 3.2 to remove the lower cover.
2. Disconnect the stepping motor connector from the main board.
3. Use the Phillips screwdriver to remove the 2 screws.
4. Take out the stepping motor, you will see the plastic parts for mounting the stepping motor
and thermister
5. Remove/Replace the stepping motor.
Note: Make sure the stepping motor is mounted at the correct location and
thermistor is applied with the thermal conductive grease to keep good contact with
stepping motor case.
6. Reassemble the parts in the reverse procedures.
Stepping motor
connector
Screws
Stepping motor
203 DPI model
motor mounting
location
300 DPI model
motor mounting
location
Thermistor