Daewoo CMC-518X, Руководство по обслуживанию

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Standard Adjustment Conditions
1. Power source voltage : 100~240Vac 50/60Hz
2. Aging : Tak
e
at least 20 minutes warm-up time.
3. Signals
Video : Analog 0.7Vpp 75
Ω
terminal positive polarity
Synchronizing : TTL level Negative/Positive Separate/Composite
Deflection frequency
Horizontal Frequency : 30 KHz - 54KHz
Vertical Frequency : 50Hz - 120Hz
Pre-Adjustment
1. B+ Adjustment
Adjust 27.3Vdc
¡
0.2Vdc between TP1 and ground at 31.5KHz mode, varying VR501.
Main Adjustment
1. Setting the Controls
Set the value of items as following.
Contrast : Max. (OSD value up to MAX)
Brightness : Center (Set the OSD value to center)
2. H.size, V.size, H.phase, V.position, Pincushion, Trapezoid
Receive the cross hatch pattern of Factory preset mode.
H.Size, V.size, H.phase, V.position, Pincushion, Trapezoid are adjusted at each mode.
In Factory, Auto Alignment was done at each mode. Therefore, Factory preset mode has it's
own value according to each control.
3. Focus
(a) Set brightness control to center and contrast control to MAX.
(b) Receive all "H" character pattern of 54KHz mode signal.
(c) Adjust the Focus control of FBT to obtain best Focus (static focus and Dynamic focus).
4. Geometric Distortion Adjustment.
(a) Receive the cross hatch pattern of 54KHz mode signal.
(b) Pin balance, Pin center, Pin corner, Parallelogram are adjusted the best geometric status.
5. White Balance Adjustment
(a) Select 9300
¡£
K on the OSD Menu.
(b) Receive a cross hatch pattern of 54KHz mode signal by using the signal generator.
(c) Set the brightness control to the center, the contrast control to the maximum and sub contrast
control VR to the center.
(d) Cut off the FBT screen VR.
(e) Set the brightness control to the maximum and receive all the black patterms.
(f) Select the R-BIAS, G-BIAS and B-BIAS on the OSD menu and adjust the DATA +/- key to
get the color coordinates in x=0.281, y=0.311.
(g) Receive al full white pattern.
(h) Select the R-GAIN, G-GAIN and B-GAIN and adjust Data +/- key to get the color coordinates in
x=0.281
¡
0.05, y=0.311
¡
0.05
(i) Set the brightness control to the center and adjust the sub contrast control to get the screen
luminosity to 30t/L(a full white pattern over 30Ft/l).
(j) Check if the x,y coordinates of color analyzer is in X=0.281
¡
0.05, Y=0.311
¡
0.05.
If the color coordinates is out of range, adjust the R. G. B BIAS & GAIN to get the coorinates in
X=0.281, Y=0.311. Make sure that the coordinates is in range by using contrast control.
ALIGNMENT PROCEDURE
9