Alignment Procedure; Standard Adjustment Conditions; Main Adjustment - Daewoo 710C Service Manual

ALIGNMENT PROCEDURE

Standard Adjustment Conditions

1. Power source voltage : AC 120V, 60Hz./AC 220V, 50Hz
2. Aging : Take at least 20 minutes warm-up time.
3. Signals.
Video : Analog 0.7Vpp
Synchronizing : TTL level Negative/Positive Separate/Composite
Deflection frequency
Horizontal Frequency : 30KHz - 86KHz
Vertical Frequency : 50Hz - 160Hz
Pre-Adjustment
1. High voltage Adjustment
Adjust 26 kvdc between Anode cap and ground at a cross hatch pattern of 79.9KHz by using VR604.

Main Adjustment

1. Setting the Controls
Set the value of items as following.
Contrast : Max. (OSD value up to 100)
Brightness : Center (Set the OSD value to 50)
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 79.9KHz 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 VGA mode signal by using the signal generator.
(b) Pin balance, Parallelogram are adjusted the best geometric status.
(c) Repeat the adjustment at each mode.
5. White Balance Adjustment
(a) Receive a small box pattern of VGA mode.
(b) Select 9300°K on the OSD Menu.
(c) Set the bright control and contrast control to the maximum and receive the all black pattern.
(d) Select the R, G, B Bias on the OSD menu and adjust the ADJUST +/– key to get the color coordinates in
X=0.281, Y=0.311 and the screen luminosity to 1 Ft/L.
(e) Set the brightness control to the center and contrast control to the maximum.
(f) Receive a small box pattern.
(g) Select the R, G, B gain on the OSD menu and adjust the ADJUST +/– key to get the color coordinates in
X=0.281±0.03, Y=0.311±0.03
(h) Adjust the sub contrast control on the OSD menu to get the screen luminosity to 41~43 Ft/L in small box
pattern.
(i) Receive a full white pattern and adjust the VR605 to get the screen luminosity to 31~33Ft/L.
(j) Select 6550°K on the OSD menu and receive a small box pattern.
75Ω terminal positive polarity
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