EPSON

EPSON AMERICA, INC.

SERVICE PRODUCT SUPPORT BULLETIN

PSB NO.: P-0028

DATE: 8/1/88

PAGE: 1 of 1

 

 

 

SUBJECT: PDOS FOR THE LQ-850/950/1050 PRINTERS

The following contains information on using the LQ-850/ 1050 PDOS diagnostics (#B765108801 for MS-DOS compatible, #B765108901 for QX-16 computers) to troubleshoot the LQ- 850/950/1050 series printers,

USING PDOS:

To use PDOS on the LQ-850/950/1050 printers, a serial connection must be made to the host computer using a suitable cable (Epson part no. 8297 connects the LQ's 6-pin DIN connector to a standard DB-25 port). This cable must be connected to COM1:* on the host computer.

DIP switch positions 2-3 and 2-4 must be set to ON, and 2-5 and 2-6 to OFF. This sets the printer to 9600 baud, 8 data bits, and no parity. PDOS will automatically activate and configure the host computer's serial port.

PDOS is then started by booting off the supplied disk, and following the prompts given on screen (a detailed manual is available on the disk).

USAGE ON LQ-950:

The PDOS diagnostics for the LQ-850/1050 also operate on the LQ-950 when the following precautions are observed:

1)When the PDOS menus prompt for the selection of printer type, the LQ-850 should be chosen.

2)Jumper J7 on the MONMA board must be moved from the 136 to the 80 column position when performing the carriage motor test. The jumper should then be returned to its original position when testing is completed.

* Applies to MS-DOS compatible version of PDOS.

EPSON AMERICA SERVICE, 23610 TELO AVENUE, TORRANCE, CALIF. 90505