Ampro Corporation 486E manual Flat Panel/CRT Video Controller, Connecting a CRT J5

Product Reference

Flat Panel/CRT Video Controller

The Little Board/486e CPU provides an integrated high-performance super VGA video controller that supports both CRT and flat panel displays. Table 2–27 provides a summary of the Video Interface connectors and their specific use and features are described in the following sections.

It is possible to disable the on-board video controller by removing jumpers W11 and W12. This can help developers recover from a misprogrammed video BIOS by allowing the installation of a second display card. To re-enable the video controller, install W11 and W12 and reset the system.

Table 2–27. Video Connector Summary

Name	Connector	Pins/Type	Description
Flat	J3	50-pin Shrouded	Provides connections for a broad array of standard
Panel		.100 Header	flat panel displays. Intended for standard 50-wire
			ribbon cable.
LCD	J4	12-pin Shrouded	Ampro provides a small add-on board that will supply
Bias		.100 Header	the Vee voltage for most common LCD flat panel
Supply			displays. It mounts to this connector. For details
Option			about the Vee Supply Option, refer to it’s section,
			below.
CRT	J5	10-pin Shrouded	Provides connections for a CRT display. To connect
		.100 Header	to a standard CRT cable, use a short transition cable
			to a DB-15 connector.

Connecting a CRT (J5)

Analog video signals from the video controller appear on 10-pin dual row header, J5. These signals are compatible with the standard video monitors commonly used with desktop PCs. Specifications for compatible monitors are provided in Chapter 3.

Normally, signals from J5 are connected to a standard DB-15 video connector by a transition cable made from a ribbon cable connector and a short length of 10-wire ribbon cable. The transition cable can connect the video signals to a bulkhead-mounted DB-15 or DB-9 connector, allowing any standard CRT to be easily connected using a standard monitor video cable. Table 2–28 gives the signal pinout of J5 and pin connections for a DB-15 connector. Pin connections for a DB-9 connector, used for some monitors are also provided. Table 2–29 26 shows manufacturer’s part numbers for mating connectors to J5.

2–33