Compaq 386 manual To replace the 387 Coprocessor, follow these steps

Maintenance and Service Guide 7-47

To replace the 387 Coprocessor, follow these steps:

CAUTION

The most important step when installing the 387 coprocessor in a COMPAQ DESKPRO 386 Personal Computer is orientation of the coprocessor. See Figure 7-38 for the correct orientation. Pay particular attention to the relative positions of the beveled corners that indicate the location of Pin 1 on the 387 coprocessor.

1.Locate pin 1 of the coprocessor socket on the system board. The coprocessor socket is indicated by a notched corner.

2.Locate pin 1 on the coprocessor (indicated by a notched corner), and align the copro- cessor so that pin 1 on the coprocessor matches pin 1 on the coprocessor socket (Figure 7-48).

Figure 7-48.Aligning the 387 Coprocessor.

Addendum 108431-001 (11-88) to Manual No. 108033-003