Alignment Procedure - Daewoo 901D Service Manual

ALIGNMENT PROCEDURE

Standard Adjustment Conditions
1. Power source voltage : AC 100 - 240Vac, 50/60Hz.
2. Aging : Take at least 15 minutes warm-up time.
3. Signals.
Video : Analog 0.7Vpp
Synchronizing : H+V Sync on Green : 0.286Vpp ± 5% (Negative)
Composite H+V Sync : 1.0Vpp ~5.0Vpp (Positive / Negative)
Separate H, V Sync : TTL Level (Positive / Negative)
Deflection frequency
Horizontal Frequency : 30KHz - 95KHz
Vertical Frequency : 50Hz - 160Hz
Pre-Adjustment
1. B+ Adjustment
Adjust VR151 for 118Vdc between P6 and ground at 91KHz mode.
Main Adjustment
1. Setting the Controls
Set contrast and brightness in Control Menu unless otherwise specified.
Contrast : Max.
Brightness : Center
2. H.size, H.phase, V.size, H.phase, Side Pincushion, Pincushion S, Pincushion W, Trapezoid, Parallelogram,
Rotation, Pin Balance, H.Linearity, V.Linearity
Receive the cross hatch pattern of Factory preset mode.
H.size, H.phase, V.size, H.phase, Side Pincushion, Pincushion S, Pincushion W, Trapezoid, Parallelogram,
Rotation, Pin Balance, H.Linearity, V.Linearity controls 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 91KHz mode signal.
(c) Adjust the Static Focus VR to obtain best H.Focus.
(d) Adjust the Dynamic Focus VR to obtain best V.Focus.
(e) If the H/V Focus is not satisfactory, readjust the Static / Dynamic Focus.
4. White Balance Adjustment.
(a) Select 9300°K on the OSD Menu.
(b) Receive a full white pattern of 91KHz.
(c) Select the brightness and the contrast controls to the maximum and each R.G.B. Gain/Bias controls to the
initial values.
(d) Cut off the FBT screen VR.
(e) Receive all the black patterns and adjust FBT screen VR the screen luminosity to be approx. 0.5 ±0.1 Ft/L.
(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) Adjust screen VR the screen luminosity to be approx. 0.5 ±0.1 Ft/L.
(h) Select the brightness control to the center (50).
(i) Receive a G.Signal.
(j) Select the G - GAIN on the OSD menu and adjust the DATA +/– key to get the screen luminosity up to 26
Ft/L.
(k) Select the B - GAIN and adjust the DATA +/– key to get the color coordinates in Y=0.311±0.015.
(l) Select the R - GAIN and adjust the DATA +/– key to get the color coordinates in X=0.281±0.015.
75Ω terminal positive polarity
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