Acer LCD MB243WABNS Service Manual Download Page 6

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1.3.5 Controller Requirements

1.3.5.1 General Requirements

The monitor shall include a controller capable of

converting the analog RGB signal from a standard

WUXGA 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.

1.3.4.3 Mode Recognition Pull-in

The monitor shall recognize preset modes within a

range of +/-1KHz whichever is less for horizontal ;

and /-1Hz for vertical.

1.3.4.4 User Display Modes

In addition to the factory pre-set video modes,

provisions shall be made to store up to 9 user

modes. If the current mode is a user mode, the

monitor shall select its previously stored settings.

If the user alters a setting, the new setting will be

stored in the same user mode. The user modes

are not affected by the pre-set command. If the

input signal requires a new user mode, storage of

the new format is automatically performed during

user adjustment of the display (if required).(

Please see Note.(4) )

Preset timing Chart

1.3.5.2 Video 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

1200 is automatically expanded to fill the entire

screen.

1.3.5.3 Panel 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.

1.3.6 DC - 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).

1.3.7 Power 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

1. Product Specification (continued)

H -S y n c

V -S y n c B an d W id th

(K H z )

(H z )

(M H z )

7 2 0 x 4 0 0

3 1 .4 7 2

7 0 .4

2 8 .3 2 5

V G A

6 4 0 x 4 8 0

3 1 .4 6 9

5 9 .9 4

2 5 .1 7 5

V G A

6 4 0 x 4 8 0

3 7 .5

7 5

3 1 .5

V E S A

6 4 8 x 5 0 0

3 1 .2 3 4

5 7 .7 3 5

3 1 .2 3 4

M A C

8 0 0 x 6 0 0

3 7 .8 7 9

6 0 .3

4 0

V E S A

8 0 0 x 6 0 0

4 6 .8 7 5

7 5

4 9 .5

V E S A

1 0 2 4 x 7 6 8

4 8 .3 6 3

6 0

6 5

V E S A

1 0 2 4 x 7 6 8

6 0 .0 2 3

7 5

7 8 .7 5

V E S A

1 2 8 0 x 1 0 2 4

6 3 .9 8 1

6 0

1 0 8

V E S A

1 0

1 2 8 0 x 1 0 2 4

7 9 .9 7 6

7 5

1 3 5

V E S A

1 1

1 4 4 0 x 9 0 0

5 5 .4 6 9

5 9 .0 1

8 8 .7 5

C V T -R B

1 2

1 4 4 0 x 9 0 0

5 5 .9 3 5

5 9 .8 8 7

1 0 6 .5

C V T

1 3

1 4 4 0 x 9 0 0

7 0 .6 3 5

7 4 .9 8

1 3 6 .7 5

C V T

1 4

1 2 8 0 x 7 2 0

4 5

6 0

7 4 .2 5

C E A -8 6 1

1 5

1 2 8 0 x 8 0 0

4 9 .7 0 2

6 0

8 3 .5

C V T

1 6

1 2 8 0 x 8 0 0

6 2 .7 9 5

7 5

1 0 6 .5

C V T

1 7

1 6 0 0 x 1 2 0 0

7 5

6 0

1 6 2

V E S A

1 8

1 6 0 0 x 1 2 0 0

7 4 .0 0 6

5 9 .9 2 4

1 3 0 .2 5

C V T -R B

1 9

1 6 0 0 x 1 2 0 0

9 3 .7 5

7 5

2 0 2 .5

+ /-

V E S A

2 0

1 6 8 0 x 1 0 5 0

6 5 .2 9

5 9 .9 5 4

1 4 6 .2 5

C V T

2 1

1 6 8 0 x 1 0 5 0

6 4 .6 7 4

5 9 .8 8 3

1 1 9

C V T -R B

2 2

1 6 8 0 x 1 0 5 0

8 2 .3 0 6

7 4 .8 9 2

1 8 7

C V T

2 3

1 9 2 0 x 1 2 0 0

7 4 .0 3 8

5 9 .9 5

1 5 4

C V T -R B

2 4

1 9 2 0 x 1 2 0 0

7 4 .5 5 6

5 9 .8 8 5

1 9 3 .2 5

C V T

N O T E : (1 ) 7 6

≦

F V

≦

8 6 : m o n ito r c a n d isp la y b u t d o e sn 't g u a ra n te e .

(2 ) fV < 5 5 , o r fV > 8 6 : w a rn in g in v a lid m o d e .
(3 ) F a c to ry m o d e l :

A fte r w e first b u rn th e c o d e in to th e fla sh , e v e ry p re set-m o d e l w e ru n first m u st d o a u to -a d ju stin g .
T h e n it'll n o t d o a u to -a d ju st a g a in w h e n w e c h a n g e d p re se t-m o d e b a c k in c lu d in g A C o n /o ff D C o n /o ff.
T h e o n ly w a y th a t p re s e t-m o d e d o a u to -a d ju st a g a in is p re ss '' In te rn a l F a c to ry R e se t''.

(4 ) U se r m o d e :

T h e c o d e sh o u ld m e m o riz e 9 tim in g m o d e e x c lu siv e o f p re se t-m o d e s a s u se m o d e a n d d o a u to -a d ju stin g .
W h e n u ser se t a n e w m o d e th at is n o t a m o n g p re v io u sly . It'll d o a u to -ad ju stin g th e n b e so lv e d to u se r m o d e
T h e n e w m o d e w ill o v e rw rite th e first m e m o riz e d u se r m o d e s.
T h e u se r m o d e s b e c le a re d is sa m e a s F a c to ry m o d e . Ju st d o '' In te rn a l F a c to ry R e se t''.

(5 ) In tern a l F a cto ry R e set an d O S D F ac to ry R ese t b e h a v io r.

Ite m

R e so lu tio n

P o la rity

S o u rce

P r e se t T im in g C h a r t

FACTORY PRESET VIDEO TIMINGS (DIGITAL INPUTS)

CEA-861-C

code

H-Active

V-Active

I/P