4000 LX  (250-5100)               Settings              Faxback Doc. # 1502

Below are main logic board jumper settings for the Tandy 4000 LX :

* Denotes user changeable options.

Caution:  Some of these jumper options should NEVER be changed,
          DO NOT tell a customer to change a jumper unless you know
          the purpose of that jumper setting.

Monitor Type*
E1-E2     ON  selects color video option
          OFF selects monochrome video option

FDC Select*
E5-E6     Enables primary address for FDC   (standard)
E6-E7     Enables secondary address for FDC

Co-Processor*
E3-E4     ON   coprocessor installed
          OFF  no coprocessor installed