Samsung SP43J6HDR Alignments and Adjustments E.07

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Page 1

Alignment and Adjustments

Samsung Electronics 5-1

5. Alignment and Adjustments

5-1 Lens and Mirror Cleaning

1. Mix the alcohol and ethyl in appropriate proportions.

2. Use a clean cotton cloth or a cleaning paper.

3. Clean the top of the lens by turning it as shown. The pattern starts at the center and proceeds outward, as shown below:

4. Use minimal pressure when rubbing the mirror. Otherwise, the surface will be damaged.

5-2 Focus Adjustment for projection Lens

1. Loosen the 4 screws that secure the optical assembly.

2. After setting the optical assembly on the front cabinet, secure the unit temporarily using the two screws.

3. After applying the liquid crystal panel signal, input a lion head pattern from a pattern generator.

4. Move the focus adjustment screws right and left until the liquid crystal picture element is clearly displayed on the screen.

5. Reposition the optical assembly, and fasten all 4 screws.

6. Check the focus adjustment.

7. Repeat adjustments 1~5, if necessary.

FOCUS SECURING SCREW

FOCUS ADJUSTMENT SCREW

FOCUS SECURING SCREW

Fig. 5-1

Page 2

Alignment and Adjustments

5-2 Samsung Electronics

After replacing with the new liquid crystal panel, make sure that the liquid crystal screen center is aligned with the screen center. If they are not aligned, make the following adjustments:

1. Using a hexagonal wrench, loosen the two screws that secure the liquid crystal panel.

Note: Loosen the screws just until the panel can move easily.

2. Using two fingers, lift the liquid crystal upward. (The screen moves downward.)

3. When moving the liquid crystal panel towards the left, the screen moves right (and vice versa).

5. Repeat adjustments 2~4 until the screen center is aligned vertically and horizontally.

6. Using a hexagonal wrench, refasten the two screws.

5-3 Liquid Crystal Screen Center Adjustment

Fig. 5-2

Page 3

Alignment and Adjustments

Samsung Electronics 5-3

5-4 Side Panel Controls

5-4-1 Rear Panel Jacks

5-4-2 Side input jack

ACCESS TO MENU

PROGRAMME SELECTION

VOLUME ADJUSTMENT

LED INDICATORS

POWER

Page 4

Alignment and Adjustments

5-4 Samsung Electronics

5-5 Service Mode Adjustments

5-5-1 MATRIX IC (TDA4780) Adjustment

No. Item Range Initial value Description

00 01 02 03 04 05 06 07 08 09 10 11 12

RED DRIVE GREEN DRIVE BLUE DRIVE RED CUTOFF GREEN CUTOFF BLUE CUTOFF SUB BRIGHTNESS SUB CONTRAST SUB COLOR PEAK DRIVE LIMIT P.YC DELAY SUB TINT γ CORRECTION

63 63 63 63 63 63 20 20 20 63 15 17 63

19 14 23 32 32 32 11 20 00 53 10 09 00

Adjustment for the R gain Adjustment for the G gain Adjustment for the B gain Adjustment for the R cutoff Adjustment for the G cutoff Adjustment for the B cutoff Adjustment for the brightness Adjustment for the contrast Adjusts the color difference signal level of YUVIN 1 Adjustment for the peak drive limit Adjustment for the P.YC delay Adjusts the center of tint (0 →R 9 →CENTER 17 →G ) Adjustment for the γ correction

Page 5

Alignment and Adjustments

Samsung Electronics 5-5

5-5-2 LCD Interface IC (CXA1853_A) Adjustment

No. Item Range Initial value Description

00 01 02 03 04 05 06

Gamma gain 1 R gamma gain 1 B gamma gain 1 Gamma gain 2 R gamma gain 2 B gamma gain 2 Gamma ctrl 2

Main bright

R main bright

B main bright

White limit

63 63 63 63 63 63 63

41 29 48 16 29 36 34

Adjusts the gain of black side on the gamma curve (R,G.B) Adjusts the gain of black side on the gamma curve for R Adjusts the gain of black side on the gamma curve for B Adjusts the gain of white side on the gamma curve (R,G.B) Adjusts the gain of white side on the gamma curve for R Adjusts the gain of white side on the gamma curve for R Adjusts the change point of the white side on the gamma curve (R,G,B).

The smaller the value, the more it moves towards white. Adjust the DC level of R,G,B signal before doing the gamma adjustment.

It determines the change point of the gamma curve. The greater the value, the darker it gets.

Adjusts the DC level of R before doing the gamma adjustment. It determines the change point of the gamma curve. The greater the value, the darker it gets.

Adjusts the DC level of B before doing the gamma adjustment. It determines the change point of the gamma curve. The greater the value, the darker it gets.

Adjusts the limiter voltage of white peak of R,G,B video signal (applied to LCD). The greater the value, the lower the limiter voltage becomes.

Page 6

Alignment and Adjustments

5-6 Samsung Electronics

5-5-3 LCD Interface IC (CXA1853_B) Adjustment

No. Item Range Initial value Description

07 08

09 10 11

Gamma ctrl 1 off

Black Stretch On

R gamma ctrl 1

B gamma ctrl 1

Sub bright

R sub bright

B sub bright

Common ctrl Signal center

Sub contrast R sub contrast B sub contrast

63 63

63 63 63

31 18

41 33 33

Adjusts the change point of the black side on the gamma curve (R,G,B). The greater the value, the more it moves towards black

Adjusts the change point of the back side on the (R,G,B) gamma curve. Moves the change point to the white side. The value is always less than the one of the gamma ctrl 1 off.

Adjusts the change point of the back side on the gamma curve for R. The greater the value, the more it moves towards black.

Adjusts the change point of the black side on the gamma curve for B. The greater the value, the more it moves towards black.

Adjusts the brightness of R, G, B after doing the gamma adjustment. No change of the gamma curve. The greater the value, the darker it gets.

Adjusts the brightness of R after doing the gamma adjustment. No change on the gamma curve. The greater the value, the darker it gets.

Adjusts the brightness of B after doing the gamma adjustment. No change on the gamma curve. The greater the value, the darker it gets.

Adjusts the common voltage (applied to LCD) Adjusts the DC level of composite video signals (applied to LCD). Set

the signal center to 7V. Adjusts the gain of R, G, B (applied to LCD). Adjusts the gain of R (applied to LCD). Adjusts the gain of B (applied to LCD).

No. Item Range Initial value Description

01 02

LCD h pos

LCD v pos

SH position

255

15 15

106

3 6

Determines the start location of horizontal indication by picture element.

Determines the start location of vertical indication (within 1H) Determines the phase of the sample/hold pulse.

5-5-4 LCD CONTROLLER (CXD2443Q) Adjustment

Page 7

Alignment and Adjustments

Samsung Electronics 5-7

No. Item Range Initial value Description

lamp total time

lamp time

05999

Records total elapsed time (from the time where power is first applied). Reset not possible

Records total elapsed time (from the point where power is first applied). Reset (using the cancel key). The lamp time is displayed by using the Display key. Reset must be done during the set shipment. Reset must be done after lamp replacement.

5-5-5 Lamp’s Total Hours

5-5-6 Option

No. Item Range Initial value Description

00 01 02 03 04 05 06 07 08 09 10 11 12 13

Epg Av_link Palplus 27Mhz external 16 : 9 wide Dolby prologic 3d sound S-audio mute Blue screen UHF only Vga Atm one run Size key Vert. peaking

on/off on/off on/off on/off on/off on/off on/off on/off on/off on/off on/off on/off on/off on/off

off on off on on off on off on off off on on on

Electronic program guide Av_link

27Mhz external 16 : 9 wide Dolby prologic 3d sound Scart audio mute Blue screen UHF only Vga input Atm one run (“OFF” for France) Size key Vip option

Page 8

Alignment and Adjustments

5-8 Samsung Electronics

5-6-1 LCD Control Board PLL Adjustment

1. Input a color bar signal.

2. Connect CNL06,RPD to an oscilloscope, and check the waveforms. (1 V/div, 20 u sec/div)

5-6-2 Matrix IC (TDA4780) Sub Tint Adjustment

1. Input a color bar signal.

2. Connect CNL07 (B output) to an oscilloscope, and check the waveform. (0.5 V/div, 20 u sec/div)

5-6-3 Matrix R Output Signal Amplitude

Adjustment (Red Drive)

1. Input a 10-step signal (Color OFF).

2. Connect CNL07 (R output) to an oscilloscope, and check the waveform. (0.5 V/div, 10 u sec/div)

3. Adjust the red drive so that the signal amplitude becomes 0.7Vp-p.

4. Adjust the Sub-brightness of TDA4780 so that the waveform (without sync) is seen as shown in the figure below.

5-6-4 Matrix G Output Signal Amplitude

Adjustment (Green Drive)

1. Input a 10-step signal (Color OFF).

2. Connect CNL07 (G output) to an oscilloscope, and check the waveform. (0.5 V/div, 10 u sec/div)

3. Adjust the green drive so that the signal amplitude becomes 0.7Vp-p.

5-6- 5 Matrix B Output Signal Amplitude

Adjustment (Blue Drive)

1. Input a 10-step signal (Color OFF).

2. Connect CNL07 (B output) to an oscilloscope, and check the waveform.

(0.5 V/div, 10 u sec/div)

3. Adjust the blue drive so that the signal amplitude becomes 0.7Vp-p.

5-6-6 Main Brightness Adjustment

1. Input a 10-step signal (Color OFF).

2. Connect LCD CNL08(R1) input to an oscilloscope, and check the waveform. (2 V/div, 10 u sec/div)

3. Adjust the main brightness so that the Ref pulse is positioned on the center of signal.

Note : The change point (on gamma curve) is

determined by Ref.

RPD

DC2.8V

5-6 Circuit Adjustments

REF Pulse

Page 9

Alignment and Adjustments

Samsung Electronics 5-9

5-6-7 R Main Brightness & B Main Brightness

Adjustments

1. Input a 5-step signal (Color OFF).

2. Connect CH1 to LCD G1 input and CH2 to LCD R,B input. (1 V/div, 10 u sec/div)

3. Reverse the CH2 signal, and add CH1 and CH2 in ADD mode.

4. Adjust R,B main brightness for the waveform shown below.

Note: The R,B main brightness adjustment should

be done with Gamma Adjustment OFF (gamma ctrl1 = 63, gamma ctrl2 = 17).

5-6-8 R Sub-brightness & R Contrast

Adjustments

1. Input a 5-step signal (Color OFF).

2. Connect CH1 to LCD G1 input and CH2 to LCD R1 input. (1 V/div, 10 u sec/div)

3. Reverse the CH2 signal, and add CH1 and CH2 in ADD mode.

4. Adjust R sub-contrast and R sub-brightness waveforms, as shown below:

5-6-9 B Sub-brightness & B Contrast

Adjustments

1. Input a 5-step signal (Color OFF).

2. Connect CH1 to LCD G1 input and CH2 to LCD B1 input. (1 V/div, 10 u sec/div)

3. Reverse the CH2 signal, and add CH1 and CH2 in ADD mode.

4. Adjust B sub-contrast and B sub-brightness waveforms, as shown below:

5-6-10 Gamma Adjustment

1. Input a 5-step signal (Color OFF).

2. Connect LCD G1 input to an oscilloscope. (2 V/div, 10 u sec/div)

3. Adjust the gamma gain1, gain2 and the gamma ctrl1, crtl2 for the waveform shown below.

Brightness Adjustment

Contrast Adjustment

Brightness Adjustment

Contrast Adjustment

Page 10

Alignment and Adjustments

5-10 Samsung Electronics

5-6-11 Sub-Contrast Adjustment

1. Input a 5-step signal (Color OFF).

2. Connect LCD G1 input to an oscilloscope. (2 V/div, 10 u sec/div)

3. Adjust the sub-contrast so that the signal level is 3V, as shown below:

5-6-12 Signal Center Adjustment

1. Input a 5-step signal (Color OFF).

2. Connect LCD G1 input to an oscilloscope, and check the waveform. (2 V/div, 10 u sec/div)

3. Set the signal center to 7V.

5-6-13 Common Voltage Adjustment

1. Connect LCD COMMON input to an oscilloscope, and check the waveform.

(1 V/div, 10 u sec/div)

2. Set the common control to 6.8V.

5-6-14 White Balance Adjustment

1. Input a lion head pattern from a pattern generator.

2. Adjust the sub-brightness so that the white cannot be saturated.

3. Adjust R,B contrast for the high light of white

balance.

4. Adjust R,B sub-brightness when the middle tone is not black and white,but colored. Repeat adjustments 3 ~ 4 for optimum.

5. Adjust gamma crtl1 for adjusting the brightness of the black side.

6. Adjust R,B gamma crtl1 while checking the tone of the black side so that any color is not seen.

7. Repeat adjustments 2 ~ 6, if necessary.

5-6-15 Center Convergence Adjustment

1. Input a lion head pattern from a pattern generator.

2. Adjust the LCD Horizontal/Vertical POS.

Center 7V

Page 11

Alignment and Adjustments

Samsung Electronics 5-11

1 2

5-7 LED Display Check

Picture

Lamp

Stand By

Temp

Status

Master Power ON (in the Stand-by Mode) Normal operation

Lamp is warming up. The normal picture comes on after 25 seconds.

Air vent cover in the rear of the TV is not properly installed.

Inside temperature of the TV is over normal. Clean the air vent cover in the rear of the TV. Turn the TV back on after 1 hour. (see below “Temperature”)

The lamp needs to be replaced.

: OFF

: ON

: Blinking

◆ Temperature Wen the inside temperature of the TV becomes too high, the TV set is automatically turned off.

You will observe the following.

1. “TEMP” LED is blinking for about 5 ~ 6 seconds.

2. The picture is turned to blue screen and “TEMPERATURE” character blinks for about 5 ~ 6 seconds.

3. The power is turned off and “TEMP” LED is blinking for about 20 seconds.

(This is not a TV set failure and normal operation)