Samsung SP4388PTRX, SPM5288PTR, SPM4388PTR Alignment and Adjustments

5. Alignment and Adjustments

5-1 RF AGC Adjustment

1. Tune to the strongest local station.

2. Turn the AGC control fully clockwise (VR111,
on the IF board).

3. Adjust the AGC control until noise (snow)
disappears from the screen.

5-2 Screen Adjustment

1. Turn to the Active channel.

2. Adjust the VR (VR501, VR531, VR561) screen
for a normal picture is (no blooming or flyback
line).

3. Adjust the FOCUS control for well defined
scanning lines in the center area of the screen.

5-3 Horizontal Dynamic Focus

Adjustment

5-4 FBT B+Voltage Adjustment

PREPARATION

1. Note: The B+voltage adjustment (FBT) is
done during the chassis check at the factory.
Perform this adjustment after Sub-Brightness
and Convergence.

2. Warm up the TV for at least for 10 minutes.

3. Input 100% white pattern.

4. Select the “STANDARD“ video mode.

ADJUSTMENT

1. Connect the leads of a multimeter to GT405
(B+) and GT406(G).

2. Set VR401 (on deflection board) to either

126.9V (for NTSC), or 125.6V (for PAL).

PREPARATION

1. Input a crosshatch pattern.

2. Cover the Red and Blue Lenses.

3. Enter “STANDARD“ video mode.

4. Adjust the Green Lens for best focus.

ADJUSTMENT

Adjust VRZ01 (located on the convergence board).
Balance the left and right sides of the dynamic
focus lines.

Fig. 5-1 Balance the left and right sides

5-1Samsung Electronics

Alignment and Adjustments

5-5 Lens Focus and Static Focus

Adjustment

5-5-1 Static Focus (Electric Focus)

PREPARATION

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.

ADJUSTMENT

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.

5-5-2 Lens Focus

PREPARATION

1. Do this adjustment after the static focus
adjustment .

2. Select the “ STANDARD“ video mode.
(Contrast: 64, Brightness: 32)

3. Input a cross hatch 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:

Fig. 5-2 Crosshatch Pattern. Examine these points together

Fig. 5-3 Color Aberration

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 within a 3-block
grid around the horizontal center-line.

Observe the the color aberration near the
intersection points of the horizontal and
vertical lines (approximately 1 - 3 mm area).
If the aberration is irregular, adjust the lens as
shown in the diagram below. (Accurate
alignment of Green is important for overall
color quality.)

6. Set the Red lens at the point where Orange
becomes Crimson.

7. Set the Blue lens at the point where Purple
becomes Green.

5-2 Samsung Electronics

5-6 Convergence Adjustment

5-6-1 Convergence Adjustment

Alignment and Adjustments

1. Input a PAL pattern.

2. Warm up the set for 30 minutes before
adjustment.

3. Display the test pattern (Crosshatch) by
pressing the remote-control keys in this
sequence : Conv.°Ê Mute °Ê 1°Ê 8°Ê 2.

4. When the convergence data is severely tilted
(or if readjustments are necessary because the
convergence module was replaced), select the
"Mute" and "Yellow (TTX)" keys in turn so that
the basic data of module micom applies to the
convergence adjustments.

When making only one convergence
adjustment, only one parameter needs to be
adjusted. (The basic data does not change.)

5. After selecting R-Mute and B-Mute, display
only a green color pattern. Center the pattern
by adjusting CY.

6. After selecting G-Mute and B-Mute, adjust the
Red CY to center the picture.

7. Center the Blue Pattern as above.

11. Adjust Blue as above.

12. After the adjustments are completed, press
"Recall" to save the data.

13. Change from PAL mode to NTSC when
making NTSC adjustments.

14. After setting the NTSC line (on Screen Jig),
readjust as 7~10.

15. After the NTSC pattern adjustments are
completed, press the " RECALL" key to save
the NTSC data.

16. After the Convergence Adjustments are
completed, press the Escape key.

Note

1. If the convergence data is lost during
adjustment, use the"Saturation" (TV/Video)
key to reset the data to the initial values of the
ROM.

2. Make minor adjustments with the User
Convergence key.
A "+" pattern appears when "Conv." is pressed.

8. After the picture is centered, begin the
convergence adjustments.

First, display the green pattern:

The "Menu" key moves the cursor vertically
and horizontally.

Use the Channel and Volume keys
( Up/Down) to adjust convergence.

9. Use the "Surround" key for minor adjustments.

10. After the Green Adjustment is completed,
press the R-Mute key (confirm Green to Red).

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3. Use the "R/B" and "Ch/Vol" keys to correct
convergence. After the adjustments are
completed, press "Escape".

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