PRINCIPLES OF OPERATION
1.Block Diagram
The following diagram illustrates the relation between the main logic board and its peripherals.
Host computer
Host computer
Main Logic Board |
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| |
Parallel I/F |
| Dipswitch |
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| |
|
| Lamp |
|
Gate array |
| EEPROM | Printer mechanism |
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| Head driver | Thermal |
EPROM |
| head | |
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| ||
256K × 8 bits |
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| |
PSRAM |
| Motor driver | |
| motor | ||
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| ||
128K × 8 bits |
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| |
Kanji ROM | Cutter driver | ||
512K × 8 bits |
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| |
|
| Sensor circuit | Sensor |
CPU |
| Peripheral unit | Peripheral unit |
| driver | ||
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|
| |
RS232C I/F |
| Switch |
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|
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| |
5V | 24V |
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|
Power supply unit
Fig. 2-1 Block Diagram
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