Compaq 386 manual Video Display Controller Boards

8-28 Chapter 8, Jumper Settings and Switch Settings

8.11VIDEO DISPLAY CONTROLLER BOARDS

The COMPAQ video display controller boards (assy. no. 000031, 000160, 000345, and 000525) support only those video monitors that require positive and vertical horizontal synchronization pulses. Jumpers J3 and J5 must both be changed at the same time or the video display controller board will not function correctly.

Table 8-17. Jumper Settings for the Video Display Controller Board (assy. no. 000031, 000160 and 000345)

J3	J5	Configuration
2-3	2-3	Enable high-scan video on
		external outputs
		(Portable-default)
1-2	1-2	Disable high-scan video on
		external outputs

Figure 8-15.Jumper Locations for the Video Display Controller Board (assy. no. 000031).