TTP-225 / TTP-323 Series
SERVICE
MANUAL
THERMAL TRANSFER / DIRECT THERMAL
BAR CODE PRINTER
i
TTP-225/TTP-323
Bar Code Printer Service Manual
TABLE OF CONTENT
1. OVERVIEW ................................................................................................................ 1
1.1 Front View ............................................................................................................... 1
1.2 Interior View ............................................................................................................ 2
1.3 Rear View ................................................................................................................. 3
2. ELECTRONICS .......................................................................................................... 5
2.1 Summary of Board Connectors ............................................................................. 5
2.2 Pin Configuration .................................................................................................. 10
3. MECHANISM ........................................................................................................... 12
3.1 Replacing Feed Button PCB/ Feed Button PCB with LCD Module (Factory
option) ......................................................................................................................... 12
3.2 Replacing the Main Board and RS-232/ Ethernet (Option) interface board ..... 14
3.3 Replacing the Platen Roller Assembly ................................................................ 17
3.4 Replacing the Print Head Assembly .................................................................... 19
3.5 Replacing the Stepping Motor ............................................................................. 20
3.7Peel-off Module Installation (Option) ................................................................... 21
3.8Cutter Module Installation (Option) ...................................................................... 23
4. TROUBLESHOOTING ............................................................................................. 25
4.1 LED Status ............................................................................................................. 25
4.2 Print Quality .......................................................................................................... 26
4.3 LCD display (Factory option) ............................................................................... 28
5. MAINTENANCE ....................................................................................................... 29
UPDATE HISTORY ...................................................................................................... 31
1
TTP-225/TTP-323
Bar Code Printer Service Manual
1. OVERVIEW
1.1 Front View
1. LCD display (Factory option)
2. LED indicator
3. Feed button
4. Paper exit chute
5. Media view window
6. Top cover open lever
2
3
6
5
4
1
2
TTP-225/TTP-323
Bar Code Printer Service Manual
1.2 Interior View
1. Ribbon access cover
2. Ribbon rewind hub
3. Ribbon rewind gear
4. Print head
5. Ribbon supply hub
6. Gap sensor (receiver)
7. Media holders
8. Media guide
9. Top cover support
10. Black mark sensor
11. Platen roller
12. Gap sensor (transmitter)
13. Media guide adjuster knob
14. Top cover
4
11
6
8
10
7
1
12
5
2
3
9
13
14
3
TTP-225/TTP-323
Bar Code Printer Service Manual
1.3 Rear View
1. Power switch
2. Power jack socket
3. USB interface
4. USB host (Factory option)
5. RS-232C interface / Ethernet interface (Option)
6. SD card socket
Note:
* The interface picture is for reference only. Please refer to the product specification for the
interface availability.
* Recommended MicroSD card specification.
SD card spec
SD card capacity
Approved SD card manufacturer
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
Transcend, Panasonic
V1.0, V1.1
MicroSD 1 GB
Transcend, Panasonic
V2.0 SDHC CLASS 6
MicroSD 4 GB
Transcend
- 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
2
5
3
1
6
4
TTP-225/323
Bar Code Printer Service Manual
5
2. ELECTRONICS
2.1 Summary of Board Connectors
Main board
Connector
Description
Remark
1
USB connector
JP56
2
RS-232 interface board connector
JP50
3
Gap sensor receiver connector
JP34
Pin
Description
Voltage
1
Power
3.3V
2
GAP sensor receiver AD
0~3.3V
6
1
2 3 4 5 13 7 8
9
10
11
12
14
TTP-225/323
Bar Code Printer Service Manual
6
4
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
5
Print head connector
JP55
6
Micro processor
7
Stepping motor connector
JP14
8
Black mark sensor connector
JP17
Pin
Description
Voltage
1
Power
3.3V
2
Gap sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 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
Gap emitter connector
JP71
Pin
Description
Voltage
1
Power
3.3V
2
Gap sensor emitter
Emitter on : 2.1~2.3V
Emitter off: 3.3V
9
Head open sensor connector
JP16
Pin
Description
Voltage
1
Power
0V to 1.2V to 0V, 10ms square wave
continued
2
Head open
sensor receiver
Head close: 3.3V to under 1.0V to 3.3V,
10ms square wave continued
Head open: 3.3V continued
3
GND
0V
10
LCD connector (Option)
JP1
TTP-225/323
Bar Code Printer Service Manual
7
11
Peel-off sensor connector
JP19
Pin
Description
Voltage
1
Power
3.3V
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
12
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
13
microSD socket
JP2
14
Ribbon near end sensor connector
JP20
Pin
Description
Voltage
1
Power
3.3V
2
Ribbon near end sensor
receive
on:0V
off:3.3V
3
GND
0V
TTP-225/323
Bar Code Printer Service Manual
8
Standard board
Connector
Description
Remark
1
RS232 connector
JP5
2
Main board connector
JP50
1
2
TTP-225/323
Bar Code Printer Service Manual
9
Option board
Connector
Description
Remark
1
Ethernet connector/ RJ-45
JP4
2
Main board connector
JP50
2
1
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