Compaq 1220 manual Internal Preset Memory Capability, Power Management Function, 1.4 DDC, Mode

1.2Internal Preset Memory Capability

To minimize adjustment needs, the factory has preset popular display standards into the monitor, as shown in Table 1. If any of these display standards are detected, the picture size and position are automatically adjusted. All of the factory presets may be overwritten by adjusting the user controls. This monitor is capable of automatically storing up to 15 additional display standards. The new display infor- mation must differ from any of the existing display stan- dards by at least 1kHz for the horizontal scan frequency or 1Hz for the vertical scan frequency or the sync signal polarities must be different.

Table 1. Memory Buffer Factory Presets

	PRESET					Polarity
	TIMING			Fh(kHz)	Fv (Hz)	H	V
640	x	480	N.I.	31.47	60.0	–	–
1024	x	768	N.I.	60.02	75.0	+	+
1024	x	768	N.I.	68.68	85.0	+	+
1280	x	1024	N.I.	79.98	75.0	+	+
1280	x	1024	N.I.	91.15	85.0	+	+
1600	x	1200	N.I.	93.75	75.0	+	+
1600	x	1200	N.I.	106.25	85.0	+	+
1800	x	1350	N.I.	120.4	85.0	–	–
1920	x	1440	N.I.	112.5	75.0	–	+

1.3Power Management Function

When the monitor is in its normal operating mode (without USB operation), the monitor utilizes less than 140 watts of power and the Power LED is green.

The monitor also supports a reduced power state. The reduced power state will be entered into if the monitor detects the absence of either the horizontal sync signal and/or the vertical sync signal. Upon detecting the absence of these signals, the monitor screen is blanked, the backlight is turned off, and the Power LED is turned amber. When the monitor is in the reduced power state, the monitor will utilize < or = 3 watts of power. There is a brief warm up period before the monitor will return to its normal operating mode. Refer to your computer manual for instructions on setting energy saver features (some- times called power management features).

Note: The above energy saver feature only works when connected to computers that have energy saver fea- tures.

By selecting settings in the monitor's Energy Saver utility, you can also program the monitor to enter into the reduced power state at a predetermined time. When the monitor's Energy Saver utility causes the monitor to enter the redcuced power state, the Power LED blinks amber.

Mode	Power	Power-On Indicator
Normal	140 W	Green
Power Saving Mode	< or = 3 W	Amber

without USB operation

1.4DDC

The monitor includes the VESA DDC2B and DDC2Bi feature. DDC (Display Data Channel) is a communication channel over which the monitor automatically informs the computer system about its capabilities (e.g. each sup- ported resolution with its corresponding timing).

DDC is routed through previously unused pins of the 15-pin VGA connector.

The system will “Plug and Play” if both monitor and com- puter implement the DDC protocol.

DDC2Bi is available only with connector SIGNAL-

B.

1.5Location Considerations

When setting up and using the monitor, keep the following in mind:

•For optimum viewing, avoid placing the monitor against a bright background or where sunlight or other light sources may reflect on the display area of the monitor. Place the monitor just below eye level.

•Place the monitor away from strong magnetic or electro- magnetic fields, such as high capacity transformers, electric motors, large current power lines, steel pillars, etc....

Magnetism can cause distortion in the picture and/or color purity.

•Avoid covering the slots or openings of the monitor. Allow adequate ventilation around the monitor so the heat from the monitor can properly dissipate. Avoid putting the monitor into any enclosure that does not have adequate ventilation.

•Avoid exposing the monitor to rain, excessive moisture, or dust, as this can cause a fire or shock hazard.

•Avoid placing the monitor, or any other heavy object, on the power cord. Damage to the power cord can cause a fire or electrical shock.

•When transporting the monitor, handle it with care.

1.6Cleaning Your Monitor

When cleaning the monitor, please follow these guidelines:

•Always unplug the monitor before cleaning.

•Wipe the screen and cabinet front and sides with a soft unspoil cloth to prevent causing imperfections.

•If the screen requires more than dusting, apply water or neutral detergent to a soft cloth to clean the monitor screen.

•Do not use benzene, thinner or any volatile sub- stances to clean the unit as the finish may be permanently marked.