TTP-248M Bar Code Printer
Service Manual
TABLE OF CONTENT
1. Foundamentals About the System | 1 | ||
| Printer Overview | 1 | |
|
| Front View | 1 |
|
| Rear View | 1 |
| 1.2 | Pinter Specification | 2 |
| 1.3 Available Bar Codes | 4 | |
| 1.4 | Text Specification | 5 |
|
| Specification of Fonts | 5 |
|
| File Head of Font ( Fixed 32bytes ) | 6 |
|
| VF1~4 | 6 |
|
| BF3~4 VF3~4 | 7 |
2. Supply Specifications | 8 | ||
| 2.1 | Types of Paper | 8 |
| 2.2 | Specification | 8 |
| 2.3 | Ribbon Specification | 9 |
3. | Circuit Description | 10 | |
| 3.1 MCU10 |
| |
| 3.2 | MCU PIN Description | 12 |
| 3.3 | Reset Circuit | 21 |
| 3.4 | Memory System | 22 |
| 3.5 | Decoder Circuits | 23 |
| 3.6 | Memory Address Map | 23 |
| 3.7 | Firmware Address Map | 26 |
| 3.8 | Power Down Sensor | 27 |
| 3.9 | Print Head | 28 |
| 3.10 Motor System Circuit | 29 | |
| 3.11 Sensor Circuits | 30 | |
| 3.12 Serial Port Circuit | 33 | |
| 3.13 Parallel Port Circuit | 34 | |
| 3.14 Cutter Drive System | 35 | |
| 3.15 PIN Switch Circuits | 36 | |
| 3.16 Connector Circuits | 36 | |
| 3.17 Optional Items Circuits | 39 | |
4. | Machanism | 40 | |
| 4.1 | Remove the Covers and LCD Panel | 40 |
i
