Acer RB23WABAS service manual Analog input VGA treats all timings as PC-timings

1. Product Specification (continued)

ACER H233H

5

PRESET PC TIMINGS (ANALOG AND DIGITAL

INPUTS)

	Resolution	Resolution	Horizontal	Vertical	Nominal Pixel	Aspect
Mode
	(active dot)	(total dot)	Frequency (KHz)	Frequency (Hz)	Clock (MHz)	Ratio
VGA	640x480@60Hz	800 x 525	31.469	59.941	25.175	4:3
MAC	640x480@66.66Hz	864x525	35	66.66	30.24	4:3
VESA	720x400@70Hz	900x449	31.469	70.087	28.322	1.8
	800x600@56Hz	1024 x 625	35.156	56.250	36.000	4:3
SVGA	800x600@60Hz	1056 x 628	37.879	60.317	40.000	4:3
	1024x768@60Hz	1344x806	48.363	60.004	65.000	4:3
XGA
	1024x768@70Hz	1328x806	56.476	70.069	75.000	4:3
VESA	1152x864@75Hz	1600x900	67.5	75	108	4:3
SXGA	1280x1024@60Hz	1688x1066	63.981	60.020	108.000	5:4
WXGA	1280x800@60Hz	1680x831	49.702	59.810	83.500	16:10
WXGA+	1440x900@60Hz	1904x931	55.935	59.887	106.500	16:10
	1920x1080@60Hz	2576x1120	67.158	59.963	173.000
HD						16:9
	1920x1080@60Hz	2200x1125	67.500	60.000	148.500

PRESET VIDEO TIMING(DIGITAL INPUT)

CEA-861	H-Active	V-Active	I/P	H-Total	H-Back	V-Total	V-Back	H-Freq.	V-Freq.	P-Freq.
-c-code					Porch		Porch	(kHz)	(Hz)	(MHz)
1	640	480	p	800	48	525	33	31.5	60	25.2
2,3	720	480	p	858	60	525	30	31.5	60	27.027
4	1280	720	p	1650	220	750	20	45	60	74.25
5	1920	1080	i	2200	148	1125	15	33.75	60	74.25
16	1920	1080	p	2200	148	1125	36	67.5	60	148.5

Analog input (VGA) treats all timings as PC-timings.

1.3.5Controller Requirements

1.3.5.1General Requirements

The monitor shall include a controller capable of converting the analog RGB signal from a standard 1920x1080 resolution video controller in the CPU to a signal which can be displayed on the panel. The controller will include a PLL,A/D converters, LVDS transmitter and other circuitry necessary to perform its function. The PLL shall be stable enough to ensure that a static image from the CPU is placed in the same physical location on the flat panel in each frame.

1.3.5.2Video Stretching

The monitor shall contain provisions to “stretch” the video signal, so that an input signal from the computer in any resolution smaller than 1920 x 1080 is automatically expanded to fill the entire screen.

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1.3.5.3Panel Timing and Interface

The controller supplied with the monitor shall control all panel timing. This controller shall adequately insulate the monitor from the computer, so that no possible combination of input signals from the computer shall cause damage to the flat panel or any other component of the

monitor. The LCD panel interface shall support the TFT standard.

1.3.6DC - AC Inverter Requirements

The DC-AC inverter is on the power board. The frequencies used by the DC-AC inverter used to power the backlight shall be chosen so as to prevent any noticeable effects on the flat panel (such as a rolling effect).

1.3.7Power Supply Requirements

The AC to DC converter power supply for the monitor shall be an external AC to DC converter ”brick” This brick shall have an IEC receptacle for main power input and a pin - in ---socket for DC power out. The brick shall provide sufficient power for both the monitor and the backlight assembly, and shall meet requirements specified in Table 2.