AOC L32W451 – How to enter Factory Mode – White Balance Adjustment – SMPS and Audio Output schematic
Service Mode - W/B adjustment - Power Supply and Audio Amplifier Circuit Diagram - AOC L32W451 32inch LCD TV
Color Monitor
Instrument Orientation
Connect LCD-TV, Chroma 2225 and VG848,
and set Timing137, Pattern1 on Chroma2225. Chroma7120’s lens must aim at the
center of Pattern1 showed on the LCD-TV’s screen. The distance of Chroma7120’s
lens and the center of screen is 20cm±1cm.
ENTER FACTORY MODE
After orientation OK, set Pattern104 (black picture) on Chroma225.
After orientation OK, set Pattern104 (black picture) on Chroma225.
Press 1-9-9-9 on remote to enter the menu on top left of the
screen.
Then from UP key (△) option to enter the menu.
WHITE BALANCE ADJUSTMENT
PC Mode White Balance Adjustment
Begin to adjust the W/B (White Balance) you should select the Color Temp (Warm and Cold) and enter the son menu from father menu “Scaler”.
Begin to adjust the W/B (White Balance) you should select the Color Temp (Warm and Cold) and enter the son menu from father menu “Scaler”.
Set channel color temperature value and brightness on
Chroma7120.Set 303 319 350(warm Temp) on CH3 and 278 289 350(cold Temp) on CH4.
Press MODE key on Chroma7120 to switch xyY mode.
Use black sleeve on Chroma7120’s lens to ensure no external ray.
Set Pattern104 on Chroma2225.Adjust SCALAR RB,GB,BB value to make
sure the brightness is the lowest, then set Pattern105 on Chroma2225 and adjust
RG, GG, BG value to make the value displaying on chroma7120 is about 100.Press
“Save” to save. Switch to CH4, select cold Temp and then adjust it according to
above method. Press “Save” to save.
AV MODE W/B ADJUSTMENT
Begin to adjust AV/COMPONENT YPbPr(480I/576I)/COMPONENT T-scaler(480P/720P/1080I) /HDMI W/B, their Color Temp modes.
Begin to adjust AV/COMPONENT YPbPr(480I/576I)/COMPONENT T-scaler(480P/720P/1080I) /HDMI W/B, their Color Temp modes.
OFFSET (26%) W/B ADJUSTMENT(This is only for AV/TV)：Change the input signal to 26% white level performance .Set the
CHROMA7120 to 288 301 30 and MODE_RGB ,then adjust the TV’s RB,GB,BB to make CHROMA7120
display to 100.
W/B ADJUSTMENT (100%): Change the input signal to 100% white level
performance. Set the CHROMA7120 to 288 301 415 and MODE_RGB , then adjust the
TV’s RG, GG, BG to make CHROMA7120 display to 100.
Save the adjustment. Then change the input signal to 26% white
level performance. Set the CHROMA7120 to MODE_RGB and CH3, check whether the
color temperature was in SPEC (color spec is x±15;y±15;Y±15). In this time,
most of the TV is in SPEC, while the others should be adjusted twice or more to
make its color temperature in SPEC.
CHECK CUT OFF: Change the input signal to 0% white level
performance. First, press the “brightness” from 50% to 0% and make sure the Y
is not changed. Secondly, change the input signal to 32 GRAYS performance and
make sure the grays is not connected at any position.( as the 5% level is
between the first gray and the second gray. 5%=（1/32*1.6).
The white color temperature in PC Mode should be app.7200K
(CIE1931: x=0.303, y=0.319，Y>350), 10300K (CIE1931: x= 0.278, y= 0.289, Y>350 ).
The white color temperature in AV/TV Mode should be app. 8700K
(CIE1931:x=0.288±15, Y=0.301±15, Y>370). In this Mode, we should check the
black balance, which level is 26% of the white level (1.0Vpp).
The white color temperature in HDTV/HDMI Mode should be app. 8700K
(CIE1931:x=0.288±15, Y=0.301±15,Y>370).
Those three channels should be factory preset and not be possible
to be modified. The measurement position
is the center of the display(5) at brightness set to center and Contrast set to
max. . The tolerance of the color coordinates should be less than ± 0.015.
SMPS SCHEMATIC [Back-Light Inverter Integrated]
AUDIO AMPLIFIER SCHEMATIC
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