Acer RA19WAANU Service Manual download pdf (Page 5)

1.3.2.5 Sync Signal Loading

TTL input loading shall be equivalent to one TTL

input load. When logic 0 is asserted by a sync

input , the maximum current source from any

single monitor sync input to the driver is 1.6 mA

.When logic 1 is asserted , the maximum current

source from the driver to any single monitor sync

input is 400 uA .

1.3.2.6 Abnormal Signal Immunity

The monitor shall not be damaged by improper

sync timing , pulse duration , or absence of sync ,

or abnormal input signal amplitude ( video and/ or

sync too large or too small) , or any other

anomalous behavior of a graphics card video

generator when changing modes , or when any

combination of input signals is removed or replaced

. Additionally , under these conditions , the monitor

shall not cause damage to the driving source

1.3.3 User Controls and Indicators

1.3.3.1 Power On / Off Switch

The monitor shall have a power control switch

visible and accessible on the front of the monitor .

The switch shall be marked with icons per IEC 417

, # 5007 and # 5009.The switch shall interrupt the

DC supply to the monitor

1.3.3.2 Power Indicator LED

The monitor shall make use of an LED type

indicator located on the front of the monitor .

The LED color shall indicate the power states as

given in Table 1.

1.3.4 Monitor Modes and Timing Capability

1.3.4.1 Format and Timing

The monitor shall synchronize with any vertical

frequency from 56 to 75 Hz , and with any

horizontal frequency from 31 to 83KHz. If the input

frequency is out of the above – specified range,

the monitor shall display a warning screen

indicating that the input frequency is out of range.

Under no circumstances shall any combination of

input signals cause any damage to the monitor .

1.3.4.2 Factory Assigned Display Modes

There are 21 factory pre-set frequency video

modes. These modes have a factory pre-set for all

characteristics affecting front-of-screen

performance. When the system is powered-

on,previously stored screen parameters for a pre-

defined mode will be recalled if the operating

mode is one of those stored in memory. If the

operating mode is not one of those stored in

memory, the monitor CPU will select the PRESET

timing for a mode that is the next lowest in

horizontal scanning frequency to the mode being

currently used. The screen parameters may be

adjusted by the use of the front bezel controls and

then may be saved as a user defined mode. The

monitor shall include all the preset video timings

shown in the following page.(Please see Note.(3) )

1.3.3.4 OSD adjustment

1. Product Specification (continued)

Function L E D C olor

Full Pow er Blue color

Sleep O range color

Table 1

1.3.3.3 On-Screen Display

The Lite-ON On Screen Display system shall be

used , controlled by a Menu button. If the buttons

remain untouched for OSD turn off time while

displaying a menu , the firmware shall save the

current adjustments and exit. Also, if the video

controller changes video mode while the OSD is

active, the current settings shall be saved

immediately, the OSD turn off, and new video mode

is displayed.

K ey W hen no O SD display O SD D isplayed

1. To display the O SD m enu on the screen.

2. To select the O SD sub-M enu

Speaker Volum e/M inus

(w ith A udio)

1. Forward selection of the O SD m enu.

2. Increase the value after sub-m enu selected.

Speaker Volum e/Plus

(w ith A udio)

1. B ack-forward selection of the O SD m enu.

2. D ecrease the value after sub-m enu selected.

Em powering M enu or sub.m enu EX IT/Scenario m ode

D esc rip tio n

Menu Display

M enu or sub.m enu EX IT/A uto Adjust function.

Auto

A u to A d ju s t F u n ctio n

ITEM CONTENT

AUDIO VOLUME To increase or decrease the sound level

BRIGHTNESS Back light Luminance of the LCD panel is adjusted.

CONTRAST A gain of R , G and B signal is adjusted.

AUTO CONTRAST A gain of R , G and B signal auto adjust.

CLOCK The ratio of dividing frequency of the dot clock is adjusted.

PHASE The phase of the dot clock is adjusted.

H-POSITION The indication screen is horizontally moved right and left (1 Pixels pitch).

V-POSITION The indication screen is vertically moved up and down (1 Pixels pitch).

AUTO ADJUST Clock system auto adjustment, about under 8 sec.

COLOR BALANCE Select three kinds of modes. ( USER /6500 / 9300 ).

OSD POSITION The OSD indication position can be adjusted.

OSD LANGUAGE

Select the language used for the OSD menu among English , French ,

Italian , Deutsch and Spanish.

RECALL DEFAULTS All data copy from factory shipment data.

OSD DURATION Adjust OSD menu off time range from10~120 second.

POWER-SAVE

Back light of the LCD panel is cut when the signal is not input (AC line

power consumption 2W or less).

INFORMATION

The frequency of the horizontal / vertical synchronizing signal under the

input is indicated.

※

NOTE : OSD MENU SEE APPENDIX A

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Acer RA19WAANU Service Manual Page 5

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