LP 800  (260-2890)            Switch Settings          Faxback Doc. # 4098

Settings:

RS232C Configuration         RS-422A Configuration
┌───────┬────────┬─────────┐┌───────┬────────┬─────────┐
│Switch │  USA * │ Europe  ││Switch │  USA   │ Europe  │
├───────┼────────┼─────────┤├───────┼────────┼─────────┤
│   1   │  ON    │   OFF   ││   1   │   ON   │   OFF   │
│   2   │  OFF   │   OFF   ││   2   │   OFF  │   OFF   │
│   3   │  OFF   │   OFF   ││   3   │   OFF  │   OFF   │
│   4   │  OFF   │   OFF   ││   4   │   ON   │   ON    │
│   5   │  OFF   │   OFF   ││   5   │   OFF  │   OFF   │
│   6   │  OFF   │   OFF   ││   6   │   ON   │   ON    │
│   7   │  OFF   │   OFF   ││   7   │   ON   │   ON    │
│   8   │  ON    │   ON    ││   8   │   OFF  │   OFF   │
└───────┴────────┴─────────┘└───────┴────────┴─────────┘
* Indicates the default configuration

Note: The switches are located on the main controller board. Loosen the
      two thumb screws at the back of the printer to slide the controller
      board out. The switches are located between the parallel and serial
      interface connectors.

┌─────────────────────────────────────┐
│Selecting the Default Menu Settings: │
└─────────────────────────────────────┘

The default value for paper size and lines per page is different in the USA
(letter-size, 66 lines) and European (A4-size, 64 lines) modes.

Note: Changing the switch settings affects some of the items in the menus.

┌───────────┐
│Switch #5: │
└───────────┘

Set Switch 5 to ON to make Pin 25 of the RS-232C interface +5V. When you
set Switch 5 to OFF, pin 25 is not used.

Note: Pin 25 is not normally used in RS232C configurations, the position of
      this switch will not usually make any difference.

┌──────────────────────────────────────────────┐
│Selecting the Serial Interface Configuration: │
└──────────────────────────────────────────────┘

There are two major standards for serial printers. The default setting of
RS-232C is the most common standard used by PCs. Change this setting only 
if your computer's user's guide indicates you should.

┌────────────────────────────────────┐
│Selecting the Memory Configuration: │
└────────────────────────────────────┘

DWS2                   Memory Configuration

      2 MB          3 MB          3 MB          4 MB          5 MB
┌──────────────┬─────────────┬─────────────┬─────────────┬─────────────┐
│  1 MB Side A │ 1 MB Side A │ 2 MB Side A │ 2 MB Side A │ 2 MB Side A │
│     (only)   │ 1 MB Side B │   (only)    │ 1 MB Side B │ 2 MB Side B │
├──────────────┼─────────────┼─────────────┼─────────────┼─────────────┤
│1   ON *      │   ON        │   OFF       │   OFF       │   OFF       │
│2   OFF*      │   OFF       │   OFF       │   ON        │   OFF       │
│3   OFF*      │   OFF       │   ON        │   ON        │   ON        │
│4   ON *      │   ON        │   OFF       │   OFF       │   OFF       │
└──────────────┴─────────────┴─────────────┴─────────────┴─────────────┘

* Indicates the default setting.

Note: The switch is located just in front of the first memory socket.

┌──────────────────────────────┐
│Changing the Switch Settings: │
└──────────────────────────────┘

Note: Since this procedure involves removing the main printer controller
      board, we recommend you have a qualified Radio Shack service center
      change these settings. If you choose to change the settings yourself,
      move the printer to a static-free work area. Wear a static-draining
      wrist strap (276-2397) and touch a grounded metal object before you
      remove the controller board.

1. Turn off the power. Then remove the power cord and the interface cable.

Note: If you have installed an optional font cartridge, remove it also.

2. Loosen the two screws on the printer's back panel. Then, pull out the
   board.
3. Change the settings as indicated.
4. Install the board and tighten the screws.
5. Replace the interface cable and power cord.

(dtc-08/06/93)