Samsung Electronics
4-7
Alignment and Adjustments
4-4-5 F.S. (Fail Safe) Circuit Check
Note : The F.S. Circuit check must be performed
after servicing.
1. Turn on the TV.
2. Select the “STANDARD” video mode.
3. Short GT18, GT17 (located on the
Convergence PCB). Then, both sound and
picture disappear. (Note: Even if the shorted
terminals are removed, both sound and
picture do not appear. This proves the F.S.
circuit is working. )
4. To restore both sound and picture, turn off the
TV and reset it after about 30 seconds.
4-4-6 Static Focus Adjustment
PRECAUTION
1. Select the “STANDARD” video mode.
2. Input a crosshatch pattern.
3. Cover the lenses that are not being adjusted.
4. Connect a convergence jig and read data.
5. Adjust the lens for best focus.
(See Fig, 4-1, next page)
STATIC FOCUS (CONTINUED)
Vary the focus pack VR (Red, Blue) on the
front cabinet. Adjust the TV for best possible
focus around the center of the crosshatch
pattern, without losing overall screen balance.
Figure Crosshatch Pattern
Examine these points together.
4-4-7 Lens Focus Adjustment
PRECAUTIONS
1. Do this adjustment after the static focus
adjustment and the tilt adjustment.
2. Select the “STANDARD” video mode.
(Contrast:64, Brightness:32)
3. Input a crosshatch pattern.
ADJUSTMENT
1. Loosen the lens screws.
2. Cover the two lenses that are not being
adjusted.
3. Adjust the lens, observing the color aberration
vertically and horizontally within 3 blocks of
the center of the crosshatch pattern.
4. When the lens is turned clockwise, the color
aberration will change as follows:
Lens
Color Aberration Change
R Orange - Crimson
G Blue - Red
B Purple - Green
5. Green
lens
adjustment:
Set the lens at the point where Blue just
changes to Red. If the color aberration is
irregular throughout the picture screen, adjust
the lens to show Red color aberration
(approximately 1~3 mm area) within a 3-block
grid around the horizontal center-line. If the
color aberration is irregular, adjust the lens as
shown in the diagram below. (Accurate
alignment of Green is important for overall
color quality.)
6. Red lens adjustment
Set the Red lens at the point where Orange
becomes Crimson.
7. Blue lens adjustment
Set the Blue lens at the point where Purple
becomes Green.
P
L1
<_
L4, L2 P
L2
Fig. 4-1 Crosshatch Pattern.
Fig. 4-2 Color Aberration
Exmine these points together
Summary of Contents for PT5492X
Page 15: ...Samsung Electronics 4 9 Alignment and Adjustments 4 5 1 PT5492 4 5 Screen Jig ...
Page 19: ...Samsung Electronics 4 13 Alignment and Adjustments 4 7 Convergence Adjustment ...
Page 20: ...4 14 Samsung Electronics Alignment and Adjustments ...
Page 21: ...Samsung Electronics 4 15 Alignment and Adjustments ...
Page 22: ...4 16 Samsung Electronics Alignment and Adjustments ...
Page 23: ...Samsung Electronics 4 17 Alignment and Adjustments ...
Page 24: ...4 18 Samsung Electronics Alignment and Adjustments ...
Page 32: ...4 26 Samsung Electronics Alignment and Adjustments 4 9 7 MTS Module ...
Page 38: ...MEMO 5 4 ...
Page 45: ...8 4 MEMO ...
Page 53: ...10 7 CRT Schematic Diagrams Samsung Electronics 10 7 ...
Page 55: ...10 9 CONVERGENCE MDL 1 Schematic Diagrams Samsung Electronics 10 9 ...
Page 56: ...Schematic Diagrams 10 10 Samsung Electronics 10 10 CONVERGENCE MDL 2 ...
Page 58: ...Schematic Diagrams 10 12 Samsung Electronics 10 12 2D COMB Power Line Signal Line ...
Page 59: ...10 13 PIP Schematic Diagrams Samsung Electronics 10 13 ...
Page 60: ...Schematic Diagrams 10 14 Samsung Electronics 10 14 TERMINAL 1 ...
Page 61: ...Schematic Diagrams Samsung Electronics 10 15 10 15 TERMINAL 2 ...
Page 62: ...Schematic Diagrams 10 16 Samsung Electronics 10 16 IF V M MODULE ...
Page 63: ...10 17 CHROMA INTERLACE ONLY Schematic Diagrams Samsung Electronics 10 17 ...
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