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GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
R, G, B FOCUS ADJUSTMENT
1. Before adjusting the R, G, B FOCUS, remove the 4 screws
of Lens Assembly which is fixed on the CRT Assembly.
(See page 4.)
Then turn around the Lens Assembly by 180˚ to adjust
the fastening screw (Fig. a) and fasten the 4 screws to
secure Lens Assembly.
2. Select the adjustment mode. (See page 10.)
3. Press “7” button to display the built-in cross-hatch.
4. Press “0” and “RTN” buttons to make the picture a single
Red color.
100 button ................ to erase Red color
0 button .................... to erase Green color
RTN button .............. to erase Blue color.
5. Loosen the fasten screw and adjust Red lens focus to best
focusing point of picture center. Then fasten the screw.
(See Fig. a.)
Fig. a
6. Adjust FOCUS VR “R” of FOCUS PACK to find best fo-
cusing point of picture center.
7. Repeat steps 3 to 5 for Green and Blue colors.
TILT ADJUSTMENT
Rotate R, G, B deflection yoke so that picture becomes hori-
zon, then fasten screw.
CENTERING ADJUSTMENT
1. Stretch a thread between two center of screen edge (top
and bottom, left and right).
2. Receive NTSC.
Then select SERVICE MODE. (See Page 10.)
3. Select CONVERGENCE ADJUSTING mode, and press
"7" button to display the built-in cross-hatch pattern.
Move Cursol and recognize horizontal line indicated Y:4.
This line is vertical center. Push "9" button to display the
vertical stripes, and recognaize horizontal center.
4. Perform VCEN adjustment. (See page 12.)
5. Adjust G centering magnet so that the cross-bar pattern
center comes to screen center.
6. Perform HEIGHT adjustment . (See page 13.)
7. Perform VERT. LINEARITY adjustment.
8. Perform WIDTH adjustment. (See page 12.)
9. Check whole quality of green line.
10. Adjust R, B centering magnet so that the cross-bar pat-
tern center comes to screen center.
Summary of Contents for 50H82
Page 24: ... 25 26 THIS PAGE IS INTENTIONALLY LEFT BLANK ...
Page 45: ... 47 48 SIGNAL BOARD PD0639A BOTTOM FOIL SIDE ...
Page 46: ...DEF POWER BOARD PD0640A BOTTOM FOIL SIDE 49 50 ...
Page 47: ... 51 A V BOARD PD0075C BOTTOM FOIL SIDE ...
Page 48: ... 52 SRS 3D BOARD PD0644A BOTTOM FOIL SIDE ...
Page 50: ... 54 DIGI CONV BOARD PD0638C BOTTOM FOIL SIDE ...
Page 57: ...CIRCUIT BLOCK DIAGRAM 61 62 ...
