 Acer File Extensions |
Epson LQ-1500
The Epson LQ-1500 was Epson's first 24 pin dot matrix printer and was launched in 1984. It offered both greatly improved print quality and print speed over its 9 pin stablemates. The printer was offered with either a Parallel or Serial interface as standard. The parallel version has three sets of DIP (Dual In-line Package) switches two located on the rear panel of the printer and the third mounted on the main controller board below the printhead timing belt. The serial version has five sets also located on the rear panel and main controller board. These switches control certain printer functions and default settings, the details of which are listed below.
| Switch No. | Function | On (Up) | Off (Down) |
|---|---|---|---|
| SW1-1 | Buffer | Invalid | Valid |
| SW1-2 | Paper-out Sensor | Invalid | Valid |
| SW1-3 | Auto-line feed | Auto LF | No LF |
| SW1-4 | Not Used | Always Off | |
| SW2-1 | Character Set | See Character Table | |
| SW2-2 | Character Set | See Character Table | |
| SW2-3 | Character Set | See Character Table | |
| SW2-4 | Form Length | 12" | 11" |
| SW2-5 | 1" Skip-over perforation | Valid | Invalid |
| SW2-6 | Buzzer | Invalid | Valid |
| SW2-7 | Print Quality | NLQ | Draft |
| SW2-8 | Computer may switch the printer on or off-line | Invalid | Valid |
Character Table
| Character Set | SW2-1 | SW2-2 | SW2-3 |
|---|---|---|---|
| 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 |
A DIP Switch (SW1) is mounted on the main controller board. This switch is used when an optional Cut Sheet Feeder is used. All other switch settings on (SW1) are factory set and do not need to be changed.
| Switch No. | Function | On | Off |
|---|---|---|---|
| SW1-8 | Cut Sheet Feeder | Valid | Invalid |
Always disconnect the product from both the power source and the host computer before adjusting DIP switch SW1-8.
| Switch No. | Function | On (Up) | Off (Down) |
|---|---|---|---|
| SW3-1 | Not Used | Always Off | |
| SW3-2 | Buffer | Valid | Invalid |
| SW3-3 | Buffer Recovery Timing | See Buffer Recovery Timing Table | |
| SW3-4 | Buffer Recovery Timing | See Buffer Recovery Timing Table | |
| SW3-5 | Self-Test Operation | Valid | Invalid |
| SW3-6 | Self-Test Selection | Line Monitor | Loop Back |
| SW4-1 | Word Length | 7 Bits | 8 Bits |
| SW4-2 | Parity Check | Valid | Invalid |
| SW4-3 | Even/Odd Parity | Even | Odd |
| SW4-4 | Flag Polarity | Negative | Positive |
| SW4-5 | Baud Rate | See Baud Rate Table | |
| SW4-6 | Baud Rate | See Baud Rate Table | |
| SW4-7 | Baud Rate | See Baud Rate Table | |
| SW4-8 | Baud Rate | See Baud Rate Table | |
Buffer Recovery Timing Table
| Vacant area for bytes | SW3-3 | SW3-4 |
|---|---|---|
| 152 | OFF (DOWN) | OFF (DOWN) |
| 288 | OFF (DOWN) | ON (UP) |
| 560 | ON (ON) | OFF (DOWN) |
| 1,936 | ON (UP) | ON (UP) |
Baud Rate Table
| Baud Rate | SW4-5 | SW4-6 | SW4-7 | SW4-8 |
|---|---|---|---|---|
| 75 | ON (UP) | ON (UP) | ON (UP) | ON (UP) |
| 110 | ON (UP) | ON (UP) | ON (UP) | OFF (DOWN) |
| 134.5 | ON (UP) | ON (UP) | OFF (DOWN) | ON (UP) |
| 150 | ON (UP) | ON (UP) | OFF (DOWN) | OFF (DOWN) |
| 200 | ON (UP) | OFF (DOWN) | ON (UP) | ON (UP) |
| 300 | ON (UP) | OFF (DOWN) | ON (UP) | OFF (DOWN) |
| 600 | ON (UP) | OFF (DOWN) | OFF (DOWN) | ON (UP) |
| 1,200 | ON (UP) | OFF (DOWN) | OFF (DOWN) | OFF (DOWN) |
| 1,800 | OFF (DOWN) | ON (UP) | ON (UP) | ON (UP) |
| 2,400 | OFF (DOWN) | ON (UP) | ON (UP) | OFF (DOWN) |
| 9,800 | OFF (DOWN) | ON (UP) | OFF (DOWN) | OFF (DOWN) |
| 19,200 | OFF (DOWN) | OFF (DOWN) | ON (UP) | ON (UP) |