SAMSUNG 2009 PDP Training Manual

PDP TV Training Manual

2009 Samsung Plasma TV

Technical Training

This information is published for experienced repair technicians only and is not intended for use by the public. It does not contain warnings to advise non-technical individuals of possible dangers in attempting to service a product. Only experienced professional technicians should repair products powered by electricity. Any attempt to service or repair the product or products dealt with in this information by anyone else could result in serious injury or death. Information provided in this bul letin is subject to change or update without notice.

This training will cover the new 2009 Plasma televisions showing the new features, specifications and changes in design for this model year.

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Table of Contents

• New Features, Specifications and Introduction to 2009 PDP Model Comparison

• Power Supply – Power Supply Troubleshooting

• Logic Board – Logic Board Troubleshooting

• “Y” Board – “Y” Board Troubleshooting

• “X” Board – “X” Board Troubleshooting

• Data (Address) Board – Data/Address Troubleshooting

• Video Circuit – Video Circuit Troubleshooting

• Audio Circuit – Audio Circuit Troubleshooting

• Panel Explanation – Panel Failure Modes

• Alignment Procedures – Option Bytes

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Introduction to 2009 PDP

This presentation will introduce the 2009 Plasma televisions showing the new specifications, features and the new

Energy Star rated panels.

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This presentation will introduce the 2009 Plasma televisions showing the new specifications, features and the new Energy Star rated panels. Design, PCB changes and any special servicing requirements.

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Slim & Light

Slim Design

2009

69%

Slimmer

2008

3.8”

86.4 Lbs

1.2”

55 Lbs

50" B850

2.9”

73.6 Lbs

50" B550

28%

Slimmer

4

4/42

Like the new 2009 LCD models the Plasma models have gotten lighter, thinner and more energy efficient.

4

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600Hz Subfield Motion

Removes the blur from fast scenes with a lot of movement to provide a clearer picture.

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The 2009 Plasma system has increased the number of steps in sustain from 8 to

10. This increases the smoothness of the transitions in picture brightness levels and offers more color combinations.

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AC Drive System

10 Sub Fields

Y Electrode

X Electrode

Address (Data) Electrode

bright angle

The sustain period duration determines the pixel brightness. A total of 1024

l

levels of pixel brightness are available. Half Brightness is sustain step 9 (Binary

512) on and sustain step 10 off.

e

v

e

l

e

d

i

s

n

i

8 sub field

l

s

n

i

10 sub field

l

e

v

e

l

e

d

i

6

Other sustain cycles operate using similar methods as the previously described cycles, alternating the charge polarity at the X and Y electrodes. Each cycle will last twice as long as the one before it. A maximum of 10 sustain cycles can be produced. Maximum luminance will occur when charges are applied to the pixel at each of the 10 sustain periods.

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10 Subfield Drive Process

• Changing from 8 subfields to 10 subfields increases the number of color choices from 2

Another advantage of the 10 sub field system is smoother video linearity, brighter picture and more color choices.

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(256) to 210(1024)

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New E-Panel

Items

Brightness/ Power consumption

Back brightness Contrast ratio

(Bright room)

Color Gamut

Temperature

Color

Coordinates

(F/W)

30%

F/W

2008

58" 63"

2

430cd/m

@590W

2

180cd/m

@590W 170cd/m2@650W

0.3cd/m

110:1 (12.0)

82% (89%) 82% (89%)

9500K

0.285/0.290

400cd/m

2

0.4cd/m

87:1

(12.0)

←

2

@650W

2

58" 63"

500cd/m

(430cd/m2@490W)

203cd/m

(180cd/m

0.15cd/m

150:1

(9.5)

79% (94%) 79% (94%)

2009

2

@540W

2

@540W

2

@500W)

←←

2

460cd/m2@540W

(400cd/m2@500W)

2

170cd/m

@540W

2

@540W)

(170cd/m

2

0.15cd/m

150:1

(9.5)

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A major change in the 2009 Plasma TV this year is the introduction of an energy efficient panel which allows the TV to be Energy Star rated. This new panel will be explained in another part of this training.

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E-manual

(electronic owners manual)

E-manual

Connect the USB memory device to the side of the TV to view the electronic owner's manual. Press the TOOLS button to display the Tools menu. You can also read the E-manual by selecting Tools → E-manual.

To exit the E-manual, press the RETURN button while the chapter menu is displayed.

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New for 2009 is the addition of the “E-Manual” or electronic owners manual in the form of a flash drive.

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Specifications (50”) Comparison

SAMSUNG

(B650 50”)

PN50B650S1FXZA

48.7 (W) X11.4 (H) X32.1(D) Diagonal 50”

1920 x 1080

ATSC / NTSC 1 1300 1,000,000:1 DNIe (SEMS13)

Wise Link (USB2.0) HDMI1.3a (4-port) Anynet+ (HDMI-CEC)

450W

Size (Inches)Set

Panel

Color System

Contrast (cd/m

Function

CR (Dynamic )

Additional Function

Power Consumption

Model

Design

Size

Resolution

Tuner

Enhancer

SAMSUNG (B450 50”)

PN50B450B1DXZA

48.0 (W) x 12.4 (H) x 31.88 (D) Diagonal 50” 1365 x 768

ATSC / NTSC

2

)

1 1300 1,000,000:1 DNIe (SEMS13) HDMI1.3a (3-port)

Anynet+ (HDMI-CEC) 3D

380W

SAMSUNG (B550 50”)

PN50B550T2FXZA

48.8 (W) X 11.4 (H) X 33.3 (D) Diagonal 50”

1920 x 1080

ATSC / NTSC 1 1300

1,000,000:1 DNIe (SEMS13)

Wise Link (USB2.0) HDMI1.3a (4-port) Anynet+ (HDMI-CEC)

450W

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The comparison shown is of the most common 50” models. Smaller screen sizes have similar specifications and features. The biggest change is the increased contrast ratio due to a change in panel design and the advancement from an 8 sub field to a 10 sub field system.

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Circuit Information

• Power Supply Circuit Explanation

• Logic Board Circuit Explanation

• “Y” Board Circuit Explanation

• “X” Board Circuit Explanation

• Data (Address) Board Explanation

• Board Layout

• Video Circuit Explanation

• Audio Circuit Explanation

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SMPS Power Supply

50” Models

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The SMPS power supply will vary slightly depending on the screen size. Both however will function identically.

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SMPS Power Supply

56” & 58” Models

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Power supply removal requires the tech to remove either 6 or 8 screws be removed depending on the model and size of screen. After replacement of the SMPS make sure the voltages are adjusted according to the label posted on the panel.

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Power Supply Information (typical)

The switch mode power supply provides 8 different voltages. The 5V 30V and 12V supplies are un-switched.

The rest of the supplies are turned on by the PS-On (active low) signal from the CPU on the Digital board.

Multi-tap supplies are used because of the current requirements for the X and Y boards.

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The power supply provides switched and unswitched voltages for operation. The unswitched voltages are present as long as the unit is plugged into the wall. The +5VDC supply operates the main CPU on the digital board. The +33VDC supply is used by the tuner.

The other voltages are used by the panel drive circuits creating the Va,Vs,Vset and Ve voltages.

The Power Factor Control (PFC) circuit is used to save energy. Taking advantage of the capacitive effect of the pixel elements allows the power supply to operate at a reduced duty cycle. Using a large inductor and the capacitive effect of the panel allows energy to be stored and accessed as needed.

A separate transformer supplies the +5VDC Stand-By B+ to the Digital board. This voltage powers the Microprocessor (IC201) and enables the Key Matrix and the Remote IR Sensor. This turns on the relay activating the rest of the Power Supply PCB. If this supply is missing or low the unit will not turn on. If this signal is not present check the supply voltage for the micro.

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Switch Mode Power Supply

Troubleshooting

120VAC @ 60Hz

• The SMPS board generates the 8 switched and 2 un-switched voltages to power the PDP units.

• The Standby voltage can be verified by observing the front panel LED, if it is illuminated the stand by voltage is generally okay.

• The power supply can be forced on by shunting the PS-ON line to a ground on the same connector

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If the Ve voltage is low or missing disconnect the power supply cable from the X board. If the Ve voltage rises the X board is probably shorted. If the voltage stays low the SMPS board needs to be replaced. If the Vs voltage is low or missing it can be caused by a defective X or Y board. Check both boards for short circuits before replacing the SMPS board. If the Vs voltage is too high an effect called diffusion may occur. Diffusion is when the initialize voltage is too high. Excessive voltage causes unwanted pixel firing creating intermittent sub-pixel flashes. Power on-off cycling can be caused by a shorted component on the Logic board loading down the standby 5V.

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Switch Mode Power Supply Failure

Examples

• One possible symptom is defects in the video such as herringbone noise

• Other symptoms would be similar to X or Y board failures as the SMPS board provides the power to these boards

• Before replacing an X or Y board be sure the Vs, Vsc and VE voltages are being provided by the SMPS board

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If the Ve voltage is low or missing disconnect the power supply cable from the X board. If the Ve voltage rises the X board is probably shorted. If the voltage stays low the SMPS board needs to be replaced. If the Vs voltage is low or missing it can be caused by a defective X or Y board. Check both boards for short circuits before replacing the SMPS board. If the Vs voltage is too high an effect called diffusion may occur. Diffusion is when the initialize voltage is too high. Excessive voltage causes unwanted pixel firing creating intermittent sub-pixel flashes. Power on-off cycling can be caused by a shorted component on the Logic board loading down the standby 5V.

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Power Supply Adjustments

Vs Adjustment

Vs Test Point

Va Test Point

Va Adjustment

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Each plasma panel has a unique voltage setting required to display a picture properly and maintain long life. Incorrect adjustment of the power supply can create picture errors. Whenever a power supply board is replaced the new board must be adjusted to match the panel values shown on the sticker.

If a power supply board is replaced it is imperative that the new power supply be adjusted to match the existing panel settings. Incorrect adjustment can cause the picture to be too dark or too bright. Extreme misadjustment can greatly reduce panel life.

Locations of the test points and adjustments on a typical SMPS power supply. These adjustments must be performed when the SMPS or the panel is replaced.

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Power Supply Protection Circuits

Over Voltage Protection

The Power Supply PCB has an Over Voltage Protection circuit as well as a regulator circuit. It is designed so that when an Over Voltage condition occurs in any part of the power supply it does not affect another output stage. The following table shows the Over Voltage specifications. The unit must be unplugged to reset this error.

Intermittent shutdown may be caused by an over-voltage condition.

Over Current Protection

For this Power Supply PCB, if a short circuit occurs on either the VS, VA, 12V, 6V or 3.3V lines, the SMPS stops operating, but should not fail. When the short circuit is removed from the source line, the Power Supply will operate normally again.

Over Voltage Protection

Over Voltage PointItem

94VDCVA (typically ~75VDC)

8.2VDCD6VDC

4.7VDCD3.3VDC

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The Power Supply PCB has an Over Voltage Protection circuit as well as a regulator circuit. It is designed so that when an Over Voltage condition occurs in any part of the power supply it does not affect another output stage. The following table shows the Over Voltage specifications. The unit must be unplugged to reset this error. Intermittent shutdown may be caused by an over-voltage condition.

Over Current Protection

For this Power Supply PCB if a short circuit occurs on either the VS, VA, 12V, 6V or

3.3V lines, the SMPS stops operating, but should not fail. When the short circuit is removed from the source line the Power Supply will operate normally again.

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Power Supply Diffusion Example

• Diffusion is caused by a power supply that is not properly matched to the panel.

• Over diffusion is the most common symptom, this is where the SMPS is providing to much Vs voltage for the panel.

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The diffusion problem can be seen using the sweeping test pattern located in the customer menu under the burn protection selection. Diffusion is caused by a power supply that is not properly matched to the panel.

Over diffusion is the most common symptom, this is where the SMPS is providing to much Vs voltage for the panel.

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Power Supply Diffusion

• Allow the unit to warm up 15 to 20 minutes to stabilize the SMPS Operation

• Access the Customer Setup Menu, then Screen burn protection, then Signal Pattern

• Adjust the Vs voltage while monitoring the screen. Adjust the Vs voltage up or down, if the diffusion error is not diminished as the voltage change approaches Δ10 volts the panel needs to be replaced

• Do not adjust the Vs voltage more than 15VDC from the value printed on the panel label.

SMPS adjustments to eliminate the diffusion problem

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Logic Board Circuit Explanation

To Data

Board

Address

To “Y” Board

From

Main

Board

The Logic PCB takes the LVDS (Video/Sync) data and converts that information to Addressing and Screen Intensity Control data. The logic board generates the timing signals to trigger the drive and address signals. The output of the Logic board consists of pulses that are synchronized to create the distinctive X, Y and address signals. These pulses for the most part are used to trigger the supply voltage to create the distinctive X and Y drive signals.

Scan Sustain Initialize

LVDS

Receiver

Sustain Initialize

Digital Signal

Processor

DRAM DRAM

To “X” Board

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The luminance and chrominance information for each pixel is processed by the logic board. The LVDS receiver translates the scrambled RGB video data from the digital board. The RGB data is converted to address and sustain values. The address values control which of the RGB pixels is illuminated. The sustain time for the selected pixels controls the light intensity of each picture element. The Digital signal processor on the logic board converts the RGB data to timing or trigger signals. The timing signals are applied to the X, Y and Data boards.

Logic Board Defect Information

Defects in the logic board will cause errors in the video such as jitter. If the logic board is defective all of the pixels will be illuminated but the video will be incorrect. The error may be sectionalized or across the entire panel.

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Logic Board Troubleshooting

A defective logic board will often display the video signal but with the wrong color or a smeared picture. If you can recognize the video pattern but there are errors in color, smearing or jittering, suspect that the Logic board is defective.

• The logic board creates the timing pulses to create the X, Y and Address waveforms. Additionally the logic board is involved in controlling the power on operation. Logic board defects will usually cause the screen to show a full image but with some type of error.

The logic board creates the timing pulses to create the X, Y

New models have

LED’s for power

supply monitoring

and to show data

bus activity

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and Address waveforms. Additionally the logic board is involved in controlling the power on operation. Logic board defects will usually cause the screen to show a full image but with some type of error. The error can be inverted video, jitter or improper color or luminance. If the logic board is defective all of the pixels will be illuminated but the video will be incorrect. The error may be sectionalized or across the entire panel. Another common error is related to a loss connection on the LVDS cable. It is possible to isolate the Logic board from the Main board by accessing the test pattern on the logic board

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Isolating the Logic Board from the

Noise or incorrect image onscreen

the screen is lit and the error

2. Access PDP option submenu

4. Use the right arrow key to

Symptom:

Main Board

varies with content

Test Procedure:

1. Access Service Mode

3. Access Pattern Select

scroll through the patterns

Are the patterns

normal?

Yes

The main board is

suspected to be defective

The logic board

is suspected

No

to be defective

generated in “PDP

Option” is created in the

logic board thereby

through the LVDS cable

and the Main Board.

The test pattern

eliminating signal

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1. Access the service menu by pressing Mute + 1 + 8 + 2 + Power with the power off.

2. Access the PDP option sub menu item.

3. Access the Pattern select submenu item.

4. Scroll through the different patterns. These test patterns are generated on the Logic Board. If these patterns are displayed properly, the problem is before the logic board. This can be problem with the Logic-Main Board LVDS interconnect cable or a problem with the Main board. If the patterns are not displayed properly, the problem is probably caused by a defective Logic Board. Additionally a dead set may also be caused by the Logic board not sending out the relay on command. This can also be a set that cycles on or off quickly at startup.

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