AOC LM520i, Руководство по обслуживанию

Страница: 7 / 40

7
4. ADJUSTMENT
4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS
Adjustments should be undertaken only on following function : contrast, brightness focus, clock, H-position, V-
position, red, green, blue since
C1 color & C2 color.
No volume adjust description
4-2 ADJUSTMENT METHOD
Press MENU button to activate OSD Menu or make a confirmation on desired function, Press Left/Right button to select
the function or done the adjustment.
1. White-Balance, Luminance adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
2. Clock adjustment
Set the Chroma at pattern 63 (cross-talk pattern) or WIN98/95 shut-down mode (dot-pattern).
Adjust until the vertical-shadow as wide as possible or no visible.
This function is adjust the PLL divider of ADC to generate an accurate pixel clock
Example : Hsyn = 31.5KHz
Pixel freq. = 25.175MHz (from VESA spec)
The Divider number is (N) = (Pixel freq. x 1000)/Hsyn
From this formula, we get the Divider number, if we fill this number in ADC register (divider register), the PLL of
ADC will generate a clock which have same period with above Pixel freq.(25.175MHz) the accuracy of this clock
will effect the size of screen.(this clock was called PIXEL-CLOCK)
3. Focus adjustment
Set the Chroma at pattern 63 (cross talk pattern) or WIN98/95 shut down mode (dot-pattern).
Adjust the horizontal interference as less as possible
This function is adjust the phase shift of PIXEL-CLOCK to acquire the right pixel data .
If the relationship of pixel data and pixel clock not so match, we can see the horizontal interference at screen only
at crosstalk pattern and dot pattern we can find this phenomena, other pattern the affect is very light
4. H/V-Position adjustment
Set the Chroma at pattern 1 (crosshatch pattern) or WIN98/95 full-white pattern confirm above item 2 & 3
functions (clock & focus) was done well, if that 2 functions failed, the H/V position will be failed too. Adjust the
four edge until all four-edges are visible at the edge of screen.
5. MULTI-LANGUAGE function
There have 6 language for selection, press “MENU” to selected and confirm , press “ LEFT” or “ RIGHT” to
change the kind of language ( English , Deutch , Francais, Espanol, Italian,Chinese)
6. Reset function
Clear each old status of auto-configuration and re-do auto-configuration ( for all mode)
This function also recall C2 color-temperature , if the monitor status was in “ Factory-mode” this reset function
will clear Power-on counter ( backlight counter) too.
7. View Power-on counter and reset the Power-on counter( if not necessary , not suggest to entry factory mode)
The Power-on counter was used to record how long the backlight of panel already working, the backlight life time
was guarantee minimal 25000 hours, the maintainer can check the record only in factory mode.