 Acer File Extensions |
Epson LQ-450
The Epson LQ-450 dot matrix printer was introduced in 1991 to replace the LQ-550. The main changes over the LQ-550 were an increase in the number of standard fonts and code page support. Two sets of DIP (Dual In-line Package) switches are located in a compartment above the main control panel. The switches control certain printer functions and default settings, the details of which are listed below.
| Switch No. | Function | On | Off |
|---|---|---|---|
| SW1-1 | Character Set | See Character Tables | |
| SW1-2 | Character Set | See Character Tables | |
| SW1-3 | Character Set | See Character Tables | |
| SW1-4 | Page Length | See Page Length Table | |
| SW1-5 | Page Length | See Page Length Table | |
| SW1-6 | Typeface | Condensed | Normal |
| SW1-7 | Code Table | Graphic | Italic |
| SW1-8 | Cut Sheet Feeder | Valid | Invalid |
| SW2-1 | Not Used | ||
| SW2-2 | Tear-off Mode | Valid | Invalid |
| SW2-3 | 1" Skip-over perforation | Valid | Invalid |
| SW2-4 | Auto-line feed | Auto LF | No LF |
| SW2-5 | Select Buffer Capacity | 8KB | 1KB |
| SW2-6 | Graphics Print Direction | Bi-directional | Uni-directional |
| SW2-7 | Default Character Pitch | See Character Pitch Table | |
| SW2-8 | Default Character Pitch | See Character Pitch Table | |
Character Table
The following table shows the international character sets that can be selected with these DIP switches when DIP switch SW1-7 is off.
| Character Set | SW1-1 | SW1-2 | SW1-3 |
|---|---|---|---|
| USA | ON | ON | ON |
| France | ON | ON | OFF |
| Germany | ON | OFF | ON |
| UK | ON | OFF | OFF |
| Denmark | OFF | ON | ON |
| Sweden | OFF | ON | OFF |
| Italy | OFF | OFF | ON |
| Spain | OFF | OFF | OFF |
The following table shows the graphics character sets that can be selected with these DIP switches when DIP switch SW1-7 is on.
| Character Set | SW1-1 | SW1-2 | SW1-3 |
|---|---|---|---|
| USA (PC437) | ON | ON | ON |
| Multi (PC850) | ON | ON | OFF |
| Portugal | ON | OFF | ON |
| Can-Fra (PC863) | ON | OFF | OFF |
| Norway (PC865) | OFF | ON | ON |
Page Length Table
| Page Length | SW1-4 | SW1-5 |
|---|---|---|
| 11" | OFF | OFF |
| 12" | ON | OFF |
| 8.5" | OFF | ON |
| 11.7" | ON | ON |
Character Pitch Table
| Character Pitch | SW2-7 | SW2-8 |
|---|---|---|
| 10cpi | OFF | OFF |
| 12cpi | ON | OFF |
| 15cpi | OFF | ON |
| Proportional | ON | ON |