TSC TTP-245 Service Manual

TTP-245 / TTP-343
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1. FUNDAMENTAL OF THE SYSTEM ........................................................................ 1
1.1. Overview .................................................................................................................. 1
1.1.1. Front View ..................................................................................................... 1
1.1.2. Rear View ...................................................................................................... 2
1.2. Specification ............................................................................................................. 2
1.2.1. Printer ............................................................................................................ 2
1.2.2. LED ............................................................................................................... 4
1.2.3. Button ............................................................................................................ 4
1.3. Supply Specification ................................................................................................. 7
1.3.1. Paper .............................................................................................................. 7
1.3.2. Ribbon ........................................................................................................... 7
2. ELECTRONICS ........................................................................................................ 8
2.1. Circuit Description .................................................................................................... 8
2.2. MCU Circuit and MCU PIN Description..................................................................10
2.2.1. MCU PIN Description: .................................................................................. 11
2.3. Reset Circuit ............................................................................................................16
2.4. Memory Circuit .......................................................................................................17
2.5. Decoder Circuit ........................................................................................................18
2.6. Memory Map ...........................................................................................................19
2.7. Print Head Circuit ....................................................................................................21
2.8. Stepping Motor Drive / Protection Circuit ................................................................22
2.9. Power Circuit ...........................................................................................................24
2.10. Parallel Interface Circuit ........................................................................................25
2.11. Serial Interface Circuit ...........................................................................................27
2.12. USB Circuit ...........................................................................................................28
2.12.1. USB PIN Function ......................................................................................29
2.13. Sensor Circuit ........................................................................................................31
2.13.1. Gap and Black Mark Sensor ........................................................................31
2.13.2. Head Open Micro Switch ............................................................................32
2.13.3. Peel-off Sensor ............................................................................................33
2.13.4. Ribbon Sensor .............................................................................................34
2.14. Cutter Drive / Protection Circuit .............................................................................35
2.15. DC Motor Driver / Encoder Circuit ........................................................................36
2.16. Summary of PCB connectors .................................................................................37
3. REPLACE IMPORTANT PARTS ........................................................................... 40
3.1. Replacing Top Cover................................................................................................40
3.2. Replacing Top Inner Cover ......................................................................................42
3.3. Replacing Lower Cover ...........................................................................................44
3.4. Replacing Main Board .............................................................................................45

TSC TTP-245 Specifications

General

Print Method	Thermal Transfer / Direct Thermal
Resolution	203 dpi
Processor	32-bit RISC CPU
Max Print Width	108 mm (4.25")
Max Print Speed	5 inches per second
Interface	Parallel
Ribbon Capacity	300 meters
Label Width	1 to 4.4 inches
Dimensions	232 mm (W) x 156 mm (H) x 288 mm (D)
Power Supply	External Universal Switching Power Supply
Operating Temperature	5°C to 40°C
Storage Temperature	-40°C to 60°C
Operating Humidity	25% to 85% non-condensing
Print Length	39.37 inches (1000 mm)
Label Thickness	0.08 to 0.2 mm