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LCD Direct-View Televisions
Theory of Operation and Troubleshooting
Course: CTV-35
Training Manual
KLV-26HG2
KLV-32M1
KDL-32/42XBR950
CTV-33 i
Chapter 3 - KLV-26HG2 Troubleshooting Flowcharts ..... 14Initial Contact Flowchart A ............................................. Flowchart A ............................................. Flowchart A 14Power-ON Troubleshooting Flowchart B ....................... 15Protection Mode Troubleshooting Flowchart C1 ............ 16Protection Mode Troubleshooting Flowchart C2 ............ 17No Video Troubleshooting Flowchart D ......................... 18Video Distortion Troubleshooting Flowchart E ............... 19No Audio Troubleshooting Flowchart F .......................... 20
Chapter 4 - KLV-32M1 Troubleshooting Flowcharts ....... 21Initial Contact Flowchart A ............................................. Flowchart A ............................................. Flowchart A 21Power-ON Troubleshooting Flowchart B ....................... 22Protection Mode Troubleshooting Flowchart C1 ............ 23Protection Mode Troubleshooting Flowchart C2 ............ 24No Video Troubleshooting Flowchart D ......................... 25Video Distortion Troubleshooting Flowchart E ............... 26No Audio Troubleshooting Flowchart F .......................... 27
Chapter 5 - KDL-32/42XBR950 Troubleshooting Flow-charts .............................................................................. 28
Initial Contact Flowchart A ............................................. Flowchart A ............................................. Flowchart A 28No Power TroubleshootinNo Power TroubleshootinNo Power g Flowchart B ........................ 29Protection Mode Troubleshooting Flowchart C .............. 30Video Troubleshooting Flowchart D ............................... 31Audio Troubleshooting Flowchart E ............................... 32
Introduction .......................................................................... 1Course Overview ............................................................. 1
Chapter 1 - Basic LCD Display Theory ............................. 2
Basic Operation of an LCD Projection Television ............ 2Overview .......................................................................... 2Liquid Crystal Technology ................................................ 2
Light Polarization ................................................................. 2Liquid Crystals ..................................................................... 3Creating Color With Liquid Crystals ..................................... 4Direct-View LCD .................................................................. 5
Chapter 2 - LCD Display Troubleshooting ........................ 6Introduction ...................................................................... 6Video Abnormalities Troubleshooting .............................. 7No video .......................................................................... 7
Backlighting ......................................................................... 7No Video with Backlighting .................................................. 7
Distorted Video ................................................................ 8Rows or Columns of Pixels Lit or Unlit ................................. 8Digital Distortion Entire Screen .......................................... 10Improper Video Level ..........................................................11
White Balance ................................................................11Adjusting White Balance .....................................................11Adjusting White Balance Without a Color Analyzer ...........Adjusting White Balance Without a Color Analyzer ...........Adjusting White Balance Without a Color Analyzer 12
Table of Contents
CTV-33 ii
Table of Contents
Appendix ............................................................................... 1KLV-26HG2 LCD Panel & Board Part# per Unit Serial
Number ........................................................................Number ........................................................................Number 1KLV-26HG2 LCD Panel & Board Part# per Unit Serial
Number Cont. .............................................................. 2KLV-26HG2 Board Location ............................................ 3KLV-32M1 Board Location ............................................... 4KDL-32/42XBR950 Panel Board Location ....................... 5KLV-26HG2 Protection Mode Indications and Failure Ar-
eas ............................................................................... 6KLV-32M1 Protection Mode Indications and Failure Areas
6KDL-32/42XBR950 Protection Mode Indications and Fail-
ure Areas ..................................................................... 7KLV-26HG2 Block Diagrams ........................................... 8
Power Supply ....................................................................... 8Protection Circuits ................................................................ 9Video Processing ............................................................... 10Audio Processing ................................................................11
KLV-32M1 Block Diagrams ............................................ 12Power Supply ..................................................................... 12Protection Circuits .............................................................. 13Video Processing ............................................................... 14Audio Processing ............................................................... 15
KDV-32/42XBR950 Block Diagrams .............................. 16
Overall System Block Diagram .......................................... 16LCD Panel Power Supply .................................................. 17Audio Processing .............................................................. 18
CTV-35 1
Introduction
Course OverviewThe main concept behind this course is to develop a working (or basic) understanding of the Liquid Crystal Display (LCD) technology, and combine this knowledge with the simplifi ed fl owchart type troubleshooting procedures to effectively and effi ciently service and repair Sony LCD direct view television products.
With this concept in mind the sequence of this training manual is laid out as follows.
The training manual starts with Chapter 1 providing the basic explanations and illustrations of the LCD technology. The theoretical knowledge gained from this information will prove to be extremely helpful in understanding why and how possible defects can occur.
Chapter 2 is a natural extension of chapter 1, in that it provides descriptions and illustrations of real life defects that can occur in LCD base products. These are general (not model specifi c) defects that can occur in any LCD base product.
Chapters 3, 4, and 5 provide model specifi c fl owchart type troubleshooting procedures. These fl owcharts are base on board level troubleshooting. However, in some cases they will direct the troubleshooter to a possible defective component.
Keep in mind while reading this training manual that if a particular defect scenario is not covered, there is detailed training manuals developed for each model cover in this manual. Go to the Sony ESI web site and search the training web page for the model specifi c training manual for detailed component and board level troubleshooting procedures.
Models Cover in this manual:
KLV-26HG2 KDL-32XBR950
KLV-32M1 KDL-42XBR950
CTV-35 2
Chapter 1 - Basic LCD Display Theory
Basic Operation of Liquid Crystal Display (LCD)
OverviewProjection television displays utilizing LCD technology have been around on mass production scale for about 16 years. During most of this time period the devices were front-type projection units. The display unit was mounted on a table or hung from a ceiling to be projected to a wall or screen. This suffi ced for most commercial applications and in some home use. Recent years have seen an explosion in the number of rear-type LCD projection televisions.
Their all-in-one design eliminates the need for unsightly equipment and wires normally found in front projection setups. Advances in screen design have allowed the new rear-projection televisions to generate bright, crisp video with improved viewing angles that rivals front projection devices. Geometric distortion and convergence issues are virtually non-existent.
This chapter will cover the basics of the LCD display technology used in today’s products. All of the items discussed can be applied to Front Projection, Rear Projection, and Direct-View LCD display units. The video process circuits and light box assemblies function the same way. The only difference between the two is how the generated image is projected. Since most homes will have the rear projection unit, the descriptions to follow will focus on them.
Liquid Crystal TechnologyThree items are required for and LCD display to function: A backlight source, polarizing of the light source, and liquid crystals to manipulate the polarizations of this light.
Light PolarizationIn Figure 1-1, an example of how light is affected by polarizing fi lters is shown. Normal light can be transmitted anywhere along a 360-degree plane. This is especially true for scattered light being refl ected off of random surfaces. This is why polarizing sunglasses are so effective.In this example, a polarizing fi lter that only allows light on a vertical plane is used to fi lter the incoming backlight. If another fi lter is placed in front, allowing only horizontal phased light to pass, the light is effectively blocked. LCD devices use this basic principle to control the amount of light passing through.
FIGURE 1-1PLOARIZING FILTERS
1. Basic LCD Television
CTV-35 3
Liquid CrystalsAlthough liquid crystals come in many different forms, the key difference between the types is the arrangement of the crystals. Some have randomly arranged crystals while others are arranged in a specifi c pattern. Other differences include how they react to temperature, pressure, magnetic fi elds, and electrical current. The crystals used in LCD display devices are know as “chiral nematic”. As the crystals are arranged in layers, the crystals naturally twist slightly with each subsequent layer. Layers can be added until the crystals complete a 90-degree “twist”. This twist in the crystalline structure can be used to take a certain polarized light and shift its phase accordingly. The other characteristic of a nematic-type crystal is it ability to react to an electric potential. If an electrical potential is applied to the crystal layers, the twisted crystals will begin to “un-twist” in an amount proportionate to electrical potential until, when enough potential is reached, they line up perfectly. This is how liquid crystals are used to control light and generate images on a display device.
Figure 1-2 illustrates how the naturally occurring twist in the crystalline layer rotates the incoming polarized light to match the polarized plane of the second fi lter. In this normal state, the crystals rotate the polarized light 90-degrees to match the plane of the outgoing polarizing fi lter allowing the backlight to pass through. In Figure 1-3, an electrical potential is applied to fully “un-twist” the crystals. The polarized backlight is now perpendicular to the outgoing fi lter and no light will pass. By varying this electrical potential, the amount of effect on the twisted crystals can be altered to a point where linear control of light output is achieved.
FIGURE 1-2LIQUID CRYSTAL EFFECT ON POLARIZED LIGHT
FIGURE 1-3VOLTAGE EFFECT ON LIQUID CRYSTALS
1. Basic LCD Television
CTV-35 4
Creating Color With Liquid CrystalsAll that is required for LCD pixels to create color is to place a color fi lter in front of each pixel. By using red, green, and blue color fi lters, the required primary colors are generated to produce the millions of color variations needed for graphics and video display. Modern LCD technology uses what is known as Thin-Film Transistor (TFT) technology. Each pixel has its own transistor and capacitor, which increase the contrast rating of the LCD due to the increased retention of charge.
This helps to dramatically increase the response time for each pixel as they are scanned. Control of each pixel is simply a matter of addressing a particular column and individually activating each pixel in that row with a properly timed address pulse on the horizontal plane. The higher the pulse level, the more the crystals align, producing a lower light output. Figure 1-4 illustrates how color fi lters and TFT devices are used.
FIGURE 1-4TFT/LCD TECHNOLOGY
1. Basic LCD Television
CTV-35 5
Direct-View LCDThis type of display device uses the methods described previously to generate video by placing vertical columns of red, green, and blue fi lters over a liquid crystal layer. Thin-Film Transistors control the amount of light passing through each pixel. The light source is generated behind the LCD array. Fluorescent lamps are the most common to use. A diffuser plate distributes the light from the lamps to provide uniform brightness to all areas of the screen. A polarizing sheet is installed next to allow only one plane of light to pass. This light enters the LCD structure and is twisted 90-degrees. Another polarizing sheet is placed in front of the pixels at exactly 90 degrees. With no voltage present to “twist” the crystals into alignment, full passage of the backlighting is allowed. Control of the light output from each pixel is now possible by scanning the matrix of pixels using carefully timed pulses at the horizontal and vertical planes of the columns and rows. Figure 1-5 illustrates a typical LCD panel.
FIGURE 1-4TYPICAL DIRECT-VIEW LCD PANEL
CTV-35 6
Chapter 2 - LCD Display Troubleshooting
IntroductionThis chapter will cover issues that are unique to LCD display designs. The troubleshooting procedures will be structured so as to provide the best generic approach to isolating the cause of the failure. Most repairs are performed by replacing circuit boards. This is especially true for units that are in warranty since the service policies forbid component level servicing in almost all cases.
The video and audio processing circuits are virtually identical to those used in other display devices (e.g. CRT and Plasma). Particular attention will be given to the circuits that control and drive the panel. The Key components common to all LCD displays include the LCD panel assembly (there will be 3 of them in a projection unit), a method of passing back lighting through the LCD crystals, and circuits to scale the incoming video data to the resolution of the panel.
Regardless of the signal source, the video signal is in a digital format. All analog signal sources are digitized by the initial video process circuits. LCD panels can only accept digital signals. Most designs accept the individual RGB components in an 8 or 10-bit word size. The RGB signal will have been scaled to meet the fi xed resolution of the panel. This digital RGB data is allocated to the correct pixel position on the panel by the panel logic circuit.
Failures occurring with the LCD panel itself or the above mentioned circuits usually manifest themselves in an easily recognizable symptom. The most common are:
• No picture
• Missing or fully lit horizontal lines (individually or in groups)
• Missing or fully lit vertical lines (individually or in groups)
• Distortion in the displayed video
This last bullet can be more diffi cult to discern since the distortion can be caused by the video process circuits rather than those used to control pixel
lighting on the panel. Tips will be provided later in this chapter to point out some of the unique symptoms of panel-caused distortions versus those that are usually seen when the video process circuits are at fault.
Other failures can occur such as a unit that will not turn on or turns its self off for protection purposes. The latter will usually generate a diagnostic indication that may help in determining what the cause is. Failure of the audio processing and amplifying circuits must also be considered. All of the previously mentioned items are diagnosed in different ways that are unique to the chassis/model design. This chapter is geared towards generic approaches to servicing LCD televisions. Additional chapters in this manual will contain troubleshooting fl owcharts specifi cally tailored for a model or group of models.
Diagnostics procedures that are unique to specifi c models are best followed with troubleshooting fl owcharts specifi c to them. This manual will contain such charts located in individual chapters labeled with the model or chassis they are designed for.
2. LCD Television Troubleshooting
CTV-35 7
Video Abnormalities TroubleshootingVideo abnormalities can be anything from no video at all, missing lines or sections, unwanted pixel lighting, and severe to subtle distortions. The different scenarios that might be encountered will be classifi ed and practical approaches applied.
No videoA true “no video” condition assumes that none of the various inputs or tuner sources are displaying a picture. As mentioned earlier, it is important to immediately isolate the cause and determine if it lies within the video process or the panel control circuits. All Sony televisions generate what is known as “On Screen Display” graphics (OSD). Any display of on-screen graphics (such as channel, video input numbers, or customer setup menus) immediately disqualifi es the panel and the drive circuits as the cause. On-screen graphics can be a powerful troubleshooting tool but its use is unique to the design of the unit. A fl owchart specifi c to that chassis/model should be used.
BacklightingAll LCD televisions, whether a direct-view or projection type, require a light source be present to pass through the LCD crystals and out to the viewer. In direct-view units the current choice is multiple fl uorescent tube lamps whose light output is spread by a diffuser panel. Projection units utilize a high-intensity lamp. In Sony LCD projection units, the lamp light is split into red, green, and blue light components. These light components are sent to individual LCD panels for pixel control and recombined for projection to a screen.
Since current LCD technology is unable to completely block backlighting, a small amount of light passes through the LCD crystals and can be seen as a dark gray raster. Ambient room lighting will determine how easy this is to see. In most cases it is easier to watch the screen as the unit is being turned off to see if the raster becomes slightly darker.
All Sony LCD televisions contain protection circuits to monitor the circuits driving the backlight lamps. If the ballast control circuits or the lamp(s) fail, the unit will usually shut down and display a diagnostics indication. How this is done is unique to each model. Utilizing a troubleshooting fl owchart for that specifi c model is the best way to isolate the cause. Verifi cation of backlighting should always be the fi rst step in isolating a “no video” condition regardless of the presence of protection circuits.
No Video with BacklightingIf backlighting is confi rmed, the next step is to observe for the presence of any on-screen display (OSD) graphics. These are generated by the main microprocessor or video process circuits. The presence of OSD is a clear indicator that the LCD panel and its associated drive circuits are functioning. The focus of attention is now in the video input and process circuits. Use a troubleshooting fl owchart for the specifi c model to assist in isolating the problem.
2. LCD Television Troubleshooting
CTV-35 8
Distorted VideoDistortions in the video can be a diffi cult challenge since it can manifest itself in many ways. Fortunately, many of the distortion issues that are caused by the panel control and driver circuits are unique and usually easy to identify. Distortions can be classifi ed into the following groups:
• Unlit or fully lit rows or columns of pixels
• Digital distortion across the screen
• Improper video level
• Dark or colored spots on the screen
Rows or Columns of Pixels Lit or UnlitFully lit rows or columns of pixels are more common in LCD panels than ones that are not lit at all. The horizontal and vertical address lines are controlled by drive circuits that are linked to the panel via fl exible PC cables. These cables are bonded to the outer edge of the panel. If the bond is lost at one or more of the lines, the control voltage will be lost. This allows the liquid crystals to twist to their normal position and allow full light to pass through. Since an entire line is affected all of the red, green, or blue pixels will light. This is a clear indication of a panel failure since very expensive and specialized equipment is needed to repair the bond. Any unit under warranty will need to have the panel replaced. Figure 2-1 illustrates and example of this failure.
Current Sony policy dictates the entire unit be exchanged for direct-view models. On larger LCD panels, policy changes may occur, allowing the replacement of the defective panel in the fi eld. Always review the current service policy for a particular model by visiting the ESI website.
2. LCD Television Troubleshooting
CTV-35 9
FIGURE 2-1SAMPLE OF LCD PANEL FAILURES
2. LCD Television Troubleshooting
CTV-35 10
Digital Distortion Entire ScreenUnless the LCD panel has been damaged in any way, this type of distortion is usually caused by the process circuits for the video signal. The proper step is to isolate the cause to a particular board. The two key circuits for processing video are the initial circuits to perform analog to digital conversion, and another to scale the incoming video data to the panel resolution and allocate that information to the proper pixels.
Distortions caused by digital process circuits are unique and, in most cases, easy to identify as to the source. Random points of pixel lighting and loss of detail in the displayed image are examples of distortion caused by the initial video process stages. If this happens, using the OSD functions of the unit can help to verify this. OSD is usually inserted near the end of the digital processing, before it enters the panel scaling circuits. Figure 2-2 illustrates an example of a digital process failure in the front end of the process circuits. Note how the OSD is unaffected. The OSD has made it clear that there is nothing wrong with the panel or the scaling and drive circuits.
Distortions caused by the scaling and panel drive circuits usually generate symmetrical patterns. Erroneous highlight and black level can also occur here since gamma correction is performed at this stage.
FIGURE 2-2DIC2 CIRCUIT FAILURE
2. LCD Television Troubleshooting
CTV-35 11
Improper Video LevelVideo level issues can affect one or all of the primary colors. The panel scaling and control circuits are reliant on the initial video process stages to properly reproduce brightness and contrast levels. If an overall picture level problem occurs with white balance appearing normal, suspect the failure in the initial video stages. It is not likely that a failure in the gamma correction or LCD drive circuits will affect all three colors.
In situations where one color is at a level so as to affect white balance, the problem can be in the initial video stages or in the panel. White balance shifts on direct-LCD units are not common. If the entire range of a particular color has increased or decreased suspect a problem in the initial video stages since this is where these adjustments are located and stored on to non-volatile memory. Gamma shifts or failures usually cause white balance problems at the extreme low or highlight areas of a particular color.
White balance issues with a projection LCD unit are approached in an entirely different manner. Since 3 separate LCD panels are used, it is possible for white balance issues to occur that is not electrical in nature. If drive to one LCD panel were to fail, the symptom would be an extreme white balance shift towards the particular color of the panel that lost drive. Likewise, damage, dust or aging of polarizing fi lters could cause a drop in one or more of the primary colors.
White BalanceWhite balance adjustments are provided to vary the output level of the red, green, and blue LCD panels to achieve proper gray-scale of the displayed image. In a direct-view LCD television, the level of each red, green, and blue pixels are varied. Most Sony televisions have more than one white balance setting. Three are most common. They are: Cool, Neutral, and Warm.
Neutral is a “true” white balance. If a test pattern were to be displayed using a “stair-step” pattern from full white to black, all of the brightness levels of the scale would be true black, white and gray. The “Cool” setting adds a small amount of blue to give the picture a “hot” look. “Warm” contains a small amount of red to soften the intensity of the picture.
Adjusting of white balance is only required if the unit has had a board replacement in which the circuits controlling the balance are located. Other situations where white balance will require adjustment include aging of the unit through time, or when someone else has changed the settings.
Adjusting White BalanceThe proper procedure for adjusting white balance is covered in the service manual for each model. A color analyzer is required to properly set the X and Y values of each of the color temperature settings. The steps required to perform this adjustment varies from model to model. It also varies between a direct-view and projection unit. Because of this, it would be impossible to cover the requirements in a general sense. Each type of unit has a unique procedure for the initial setting of brightness, contrast, and what color temperature to start with. Some direct-view LCD models have an adjustable backlight that must be set to a certain level. The procedure for reading color balance from the screen also varies for a projection or direct-view model.
Many technicians will not have the luxury of carrying a color analyzer. They are expensive ($4000 and up) and require training to use properly. In cases where color balance must be adjusted and an analyzer is simply
2. LCD Television Troubleshooting
CTV-35 12
not available, there is a procedure that can be performed that will produce satisfactory results. Although not nearly as accurate, it is better that not doing the adjustment at all. This procedure should only be done if it is absolutely necessary and a color analyzer cannot be acquired.
Adjusting White Balance Without a Color Analyzer
In cases where a color analyzer is not available, white balance can be aligned by eye. Technicians who are experienced with adjusting CRT-based displays will be familiar with this procedure. They are similar except that CRT’s require that the G2 grid (screen) be adjusted to the point of stopping the electron emissions from the cathode at reference black. Drive controls are then adjusted to make each cathode emit the proper level of electrons at high brightness to achieve a white raster.
When adjusting an LCD display, there are no cutoff adjustments. In this particular model, the Sub-Contrast adjustments are used to adjust white balance for the bright areas of the screen. The Sub-Brightness adjustments are set for the low-level brightness areas.
The best test pattern to use when visually adjusting white balance is a monochrome stair-step pattern versus a 100IRE white screen. This provides a view throughout the range of brightness levels the display will generate. Another signifi cant difference in the adjustment procedure is starting with the “Neutral” picture setting. The “Warm” setting shifts the white balance towards the red end of the scale whereas the “Cool” setting shifts towards the blue spectrum. By using “Neutral”, the white balance can be adjusted visually. This provides a reference for the eye so that the “Cool” mode can be set with the Blue Sub-Brightness and Contrast increased slightly to boost the color temperature to around 9300K. The “Warm” setting will have more Red Sub-Brightness and Contrast levels to create a white balance in the 6500K range. “Neutral” should fall into the 8000K level.
Be certain to leave the low-bit data settings for the Green Sub-Brightness
and Contrast to zero. The high-bit data should be in the mid range. Adjust the Blue and Red data to achieve white by adding these colors to the green. The following procedure can be used for a unit when the white balance is signifi cantly off:
1. With the unit in “Neutral”, set the brightness level to one-third and the picture level to two-thirds. Input a monochrome stair-step pattern with at least 75IRE at the highest white level.
2. Check that the Green Sub-Contrast and Brightness levels are set to mid-range for the upper-bit data and zero for the lower-bit data.
3. Set the Red upper-bit data for Sub-Contrast and Brightness to mid-range and the lower-bit data to mid-range.
4. Set the Blue upper-bit and lower-bit data for Sub-Contrast and Brightness to zero. The picture will now be a yellowish/green.
5. Adjust the Red Sub-Contrast Low to generate a yellow color at the brightest portion of the test pattern. If you fi nd that you are reaching the extreme end of the data range (0 – 255), set the Red Sub-Contrast High up or down one number and try again.
6. Once the bright video level is closest to yellow as possible, repeat the above procedure for the Red Sub-brightness adjustments.
7. When satisfactory yellow is achieved throughout the video range, set the high-bit data for Blue Sub-Contrast and Brightness to mid-range. Adjust the low-bit data for each to change the yellow screen to white. If you are at either of the extreme ends of the data ranges (0 – 255), set the upper-bit data up or down accordingly.
8. Once the “Neutral” white balance is satisfactory, adjust the “Warm” white balance in the same way. Add a small amount of extra Red Sub-Contrast and Brightness. “Cool” is adjusted adding a small amount of extra Blue Sub-Contrast and Brightness data.
Although the above procedure can be somewhat subjective, it has worked
2. LCD Television Troubleshooting
CTV-35 13
rather well for CRT-based consumer televisions for many years. It is a viable alternative when a color analyzer is impossible to acquire.
CTV-35 14
Chapter 3 - KLV-26HG2 Troubleshooting Flowcharts
KLV-26HG2 Index Troubleshooting Flowchart A
StartInitial Analysis
Does unit Turn ON?
Is Video Present?
No
Yes
Is Video Distorted?
Is Audio Present?
Is RED LED Flashing?
No
No
No
No
Yes
Yes
Yes
Yes
Red LED ON in StandbyGreen LED flashes and
Glows Steady
GO TOPower-ON
TroubleshootingFlowchart B
GO TOProtection Mode TroubleshootingFlowchart C1, 2, 3
GO TONo Video
TroubleshootingFlowchart D
GO TOVideo Distortion Troubleshooting
Flowchart E
GO TONo Audio
TroubleshootingFlowchart F
GO HOMENo Problem
FoundUnit Fully
Operational
A
Initial Contact Flowchart A
CTV-35 15
3. KLV-26HG2 Troubleshooting Flowcharts
Power-ON Troubleshooting Flowchart BKLV-26HG2 Power-ON Troubleshooting
Flowchart B
Unit will Not Turn- ON
(No Power)
Is RED LED ON?
No
Yes
Press TV or Remote-Conrol POWER
Button
B
Press TV POWER
Button (Not Remote-
Control)
Does GREEN LED
light?
No
Yes
Check Voltage at CN6006/
Pin 1
Is voltage STBY 5VPresent?
No
Yes
RED LED is Flashing
1.5sec. ON 0.5sec. OFF
G1-Board
Initial Power OK Troubleshoot Video,
Panel, or Audio Problem
Check voltage at CN4603/Pin 11
Is voltage Panel 12VPresent?
No
YesDoes GREEN LEDremain ON?
Yes
No
G1-Board
Check Voltage at
CN6006/Pin 3
Is voltage 3.2V
Present?
Replace G1-Board
Yes
No
Replace G1-Board
Replace B-Board
Check Voltage at
CN2801/Pin 23
Replace B-BoardReplace
B-Board
Is voltage 3.2V
Present?
Replace A1-Board
A1-Board
A1-BoardIMPORTANTLCD Panel and Board part numbers are serial number dependent. Go
to appendix and reference serial number
range for proper part number of component.
CTV-35 16
3. KLV-26HG2 Troubleshooting Flowcharts
Protection Mode Troubleshooting Flowchart C1KLV-26HG2 Protection Mode Troubleshooting
Flowchart C-1
Unit Shuts OFFRED LED Flashing
2sec. ON2sec . OFFLCD Drive
Check Voltages At
CN1003/Pins 18 & 22-25
NOTE: All voltages are measured prior to unit shutdown
C-1
0.5sec. ON1.5sec . OFFLCD Panel
Check Voltage
At CN6003/Pins 13
Is Voltage 16.5V
Present?
Replace G1-Board
Replace LCD Panel Assembly
Yes
No
Check Voltage
At CN4603/Pin 24
Is Voltage 3.3V
Present?
Replace B-Board
Yes
No
Are voltages
Pin 18 - 5VPins 22-25 - 3.3V
Present?
Replace A1-Board
Replace B-Board
Yes
No
NOTE: Confirm Power Supply operation on
both the G1 & A1 boards reference
Flowchart B
G1-Board
A1-Board
B-Board
IMPORTANTLCD Panel and Board part numbers are serial number dependent. Go
to appendix and reference serial number
range for proper part number of component.
CTV-35 17
3. KLV-26HG2 Troubleshooting Flowcharts
Protection Mode Troubleshooting Flowchart C2
1.5sec . ON0.5sec. OFF
Power Supply
1sec. ON1sec. OFF
Temperature
Confirm acceptable local
external environment temperature
Check Voltage
at CN6003/Pin 13
Is Voltage 16.5V
Present?
Check Voltage
at CN4601/Pins 5-7
Is voltage 6.8V
Present?
Replace G1-Board
A1-Board
No
Yes
Yes
No
G1-Board
Unit Shuts OFFRED LED Flashing
C-2 KLV-26HG2 Protection Mode Troubleshooting Flowchart C-2
NOTE: All voltages are measured prior to unit shutdown
Is temperature
< 75 degrees CelsiusPresent?
Is Temperature of LCD Panel
only warm to the touch?
Move TV into an acceptable environment and Re-Test
NOTE: Check that the TV is not near other
devices that may cause a rise in temperature.
Such as, home heating systems.
No
Yes
Replace LCD Panel Assembly
Replace B-Board
No
Excessive temperature to the touch
YesNormal temperature to the touch
Replace G1-Board
Check Voltage
at CN4603/Pin 20
Is voltage 3V
Present?
Replace A1-Board
No
Yes
Check Voltage
at CN4603/Pin 19
Is voltage2.75V
Present?
Replace A1-Board
Replace B-Board
No
Yes
A1-Board
A1-Board
IMPORTANTLCD Panel and Board part numbers are serial number dependent. Go
to appendix and reference serial number
range for proper part number of component.
CTV-35 18
3. KLV-26HG2 Troubleshooting Flowcharts
No Video Troubleshooting Flowchart DKLV-26HG2 No Video Troubleshooting
Flowchart D
No Video
Is Video Missing on All Inputs ?
1,2,3 etc.
No
Yes
D
Check External Device
and Separate ConnectionsSwap Devices
and Connections
Are External Devices and Connections
OK?
TV OKRepair External
Devices orConnections and
Re-Test
Check Voltage at CN6003/Pins 5-7
Replace A1-Board
Replace G1-Board
Is Voltage
6VPresent?
G1-Board
Yes No
Yes
No
Check Memory Stick
Input
Is Video or Pictures
Displayed?
No
Turn ON User Menu
Yes
Does User Menu
Display?
Replace B-Board
No
Check Voltage at CN5801/Pins 1&2
Yes
Is Voltage
12VPresent?
Replace A1-Board
No
Yes
Replace LCD Panel Assembly
Repair LVDS Cable
Connection and Re-Test
LVDS Cable
Connections OK?
No
Yes
Replace A1-Board
B-Board
Check LVDS Cable Connections between B
Board & LCD Panel Assb.
IMPORTANTLCD Panel and Board
part numbers are serial number dependent. Go
to appendix and reference serial number
range for proper part number of component.
CTV-35 19
3. KLV-26HG2 Troubleshooting Flowcharts
Video Distortion Troubleshooting Flowchart EKLV-26HG2 Video Distortion Troubleshooting
Flowchart E
Video Distorted
Is Distortion on All Video Inputs ?
1,2,3 etc.
Yes
No
Check External Device
and Connections
Swap Devices and connections
Bad
Good
Video 1, 2 DistortedVideo 3, 4 OK
Video 1, 2 OKVideo 3, 4 Distorted
Is Distortion in USER MENU?
Yes
TV OKRepair External
Devices orConnections
Replace B-Board
Replace A1-Board
Replace B-Board
No
E
Turn ON USER MENU
IsDistortion Stationary
Missing Horizontal or Vertical Lines. Or Missing Pixels?
Replace LCD Panel Assembly
Replace B-Board
No
Yes
Check Memory Stick
Input
Is Memory Stick
Video or PicturesDistorted?
Replace A1-Board
No
Yes
IMPORTANTLCD Panel and Board
part numbers are serial number dependent. Go
to appendix and reference serial number
range for proper part number of component.
CTV-35 20
3. KLV-26HG2 Troubleshooting Flowcharts
No Audio Troubleshooting Flowchart FKLV-26HG2 No Audio Troubleshooting
Flowchart F
Is Voltage12V
Present?
Check Voltage at CN4601/Pins 1&2
No
No Audio(Speaker Outputs)
Is Audio Missing on All Inputs ?
1,2,3 etc.
No
Yes
NOTE: Confirm all DC Voltages to circuit boards
before replacing
Connections OK?
Replace A1-Board
No
Yes
Check Speaker
Connections on A1-Board
Check Individual
Audio Inputs
Check External Devices
and Connections
Swap Devices and connections
No Audio Inputs 1 **ONLY**
Replace U1-Board
No Audio Input 2
**ONLY**
Replace H2-Board
Replace A1-Board
No Audio Inputs 3**ONLY**
No Audio Tuner Input **ONLY**
Replace TU-Board
No Audio Input 4
**ONLY**
TV OKRepair External
Devices orConnections
Good
Bad
Yes
F
Repair Speaker Connections
Replace UD-Board
Replace G1-Board
No Audio Memory Stick
Input **ONLY**
Replace MSX & MS-
Board
IMPORTANTLCD Panel and Board part numbers are serial number dependent. Go
to appendix and reference serial number
range for proper part number of component.
CTV-35 21
Chapter 4 - KLV-32M1 Troubleshooting Flowcharts
KLV-32M1 Index Troubleshooting Flowchart A
StartInitial Analysis
Does unit Turn ON?
Is Video Present?
No
Yes
Is Video Distorted?
Is Audio Present?
Is RED LED Flashing?
No
No
No
No
Yes
Yes
Yes
Yes
Red LED ON in StandbyGreen LED flashes and
Glows Steady
GO TOPower-ON
TroubleshootingFlowchart B
GO TOProtection Mode TroubleshootingFlowchart C1 & 2
GO TONo Video
TroubleshootingFlowchart D
GO TOVideo Distortion Troubleshooting
Flowchart E
GO TONo Audio
TroubleshootingFlowchart F
GO HOMENo Problem
FoundUnit Fully
Operational
A
Initial Contact Flowchart A
CTV-35 22
4. KLV-32M1 Troubleshooting Flowcharts
KLV-32M1 Power-ON Troubleshooting Flowchart B
Unit will Not Turn- ON
(No Power)
Is RED LED ON?
No
Yes
Press TV or Remote-
Control POWER Button
B
Press TV POWER
Button (Not Remote-
Control)
Does GREEN LED
light?
No
Yes
1
0
How manyInitial
Relay Clicksare heard?
0 or 1
Check Voltage at
CN651/Pin 14
Is voltage STBY 5VPresent?
No
Check connections CN7000 & CN5504
Connections OK?
AU-Board
NoYes
Yes
Repair connections
RED LED is Flashing
1.5sec. ON 0.5sec. OFF
GL-Board
Initial Power OK Troubleshoot Video,
Panel, or Audio Problem
Check voltage at CN5504/Pin A43
Is voltage Panel 5VPresent?
No
Yes
Does GREEN LEDremain ON?
Yes
No
GL-Board
Check Voltage at
CN651/Pin 15
Is voltage 3.2V
Present?
Replace BL-Board
A-1052-703-A
Replace GL-Board
A-1052-705-A
Yes
No
Replace AU-Board
A-1071-844-A
Replace GL-Board
A-1052-705-A
Replace BL-Board
A-1052-703-A
Replace BL-Board
A-1052-703-A
Power-ON Troubleshooting Flowchart B
CTV-35 23
4. KLV-32M1 Troubleshooting Flowcharts
Replace AU-Board
A-1071-844-A
KLV-32M1 Protection Mode Troubleshooting Flowchart C-1
Unit Shuts OFFRED LED Flashing
2sec. ON2sec. OFFLCD Drive
Check Voltages At
CN1001/Pins B45 & A47
NOTE: All voltages are measured prior to unit shutdown
C-1
0.5sec. ON1.5sec. OFFLCD Panel
Check Voltage
At CN652/Pins 1-5
Is Voltage 16.5V
Present?
Replace LCD Panel
1-805-640-11 Assembly
Yes
No
Check Voltage
At CN652/Pin 12
Is Voltage 3.3V
Present?
Yes
No
Are voltages B45 - 5V
A47 - 3.3VPresent?
Yes
No
NOTE: Confirm Power Supply operation on both the GL & AU boards reference
Flowchart B
GL-Board
GL-Board
BL-Board
Replace GL-Board
A-1052-705-A Replace BL-Board
A-1052-703-A
Replace BL-Board
A-1052-703-A
Protection Mode Troubleshooting Flowchart C1
CTV-35 24
4. KLV-32M1 Troubleshooting Flowcharts
1.5sec. ON0.5sec. OFF
Power Supply
1sec . ON1sec. OFF
Temperature
Confirm acceptable local
external environment temperature
Check Voltage
at CN651/Pins 5-8
Is Voltage 10.5V
Present?
Check Voltage
at CN1001/Pin B40
Is voltage 8.5V
Present?
BL-Board
No
Yes
Yes
No
GL-Board
Unit Shuts OFFRED LED Flashing
C-2 KLV-32M1 Protection Mode Troubleshooting Flowchart C-2
NOTE: All voltages are measured prior to unit shutdown
Is temperature
< 75 degrees CelsiusPresent?
Is Temperature of LCD Panel
only warm to the touch?
Move TV into an acceptable environment and Re-Test
NOTE: Check that the TV is not near other
devices that may cause a rise in temperature.
Such as, home heating systems.
No
Yes
Replace LCD Panel
1-805-640-11Assembly
No
Excessive temperature to the touch
YesNormal temperature to the touch
Check Voltage
at CN1001/pin A47
Is voltage 8.5V
Present?
No
Yes
Check Voltage
at CN652/Pins 1-5
Does voltage
Increase to 20V before shutdown?
No
Yes
BL-Board
GL-Board
Replace BL-Board
A-1052-703-A
Replace BL-Board
A-1052-703-AReplace
AU-BoardA-1071-844-A
Replace AU-Board
A-1071-844-A
Replace GL-Board
A-1052-705-A
Replace GL-Board
A-1052-705-A
Protection Mode Troubleshooting Flowchart C2
CTV-35 25
4. KLV-32M1 Troubleshooting Flowcharts
KLV-32M1 No Video Troubleshooting Flowchart D
No Video
Is Video Missing on All Inputs ?
1,2,3 etc.
No
Yes
D
Check External Devices
and Separate Connections
Swap Devices and Connections
Are External Devices and Connections
OK?
TV OKRepair External
Devices orConnections and
Re-Test
Check Voltage at CN9302/
Pins 17-18
Replace ULU-Board
A-1052-705-A
Is Voltage
5VPresent?
ULU-Board
Yes No
Yes
No
Check Voltage at CN9302/
Pin 25
Is Voltage
9VPresent?
ULU-Board
No
Turn ON USER MENU
Check for analog
component signals on CN9303/Pins 1,3,5
Yes
Are signalsPresent?
Does USER MENU
Display?
No
Yes
No
Check Voltage at CN4501/
Pins 26-30
Yes
Is Voltage
5VPresent?
Check LVDS Cable Connections between BL Board & LCD Panel
Assb.
No
Yes
Repair LVDS Cable
Connection and Re-Test
LVDS Cable
ConnectionsOK?
No
Yes
Replace LCD Panel
1-805-640-11Assembly
Replace AU-Board
A-1071-844-A
Replace AU-Board
A-1071-844-A
Replace AU-Board
A-1071-844-A
Replace BL-Board
A-1052-703-A
Replace ULU-Board
A-1052-705-A
No Video Troubleshooting Flowchart D
CTV-35 26
4. KLV-32M1 Troubleshooting Flowcharts
KLV-32M1 Video Distortion Troubleshooting Flowchart E
Video Distorted
Is Distortion on All Video Inputs ?
1,2,3 etc.
Yes
No
Check External Devices
and Connections
Swap Devices and connections
Bad
Good
Video 1,2,3, DistortedVideo 4, 5 OK
Video 1,2,3, OKVideo 4, 5 Distorted
Is Distortion in USER MENU?
Yes
TV OKRepair External
Devices orConnections
No
E
Turn ON USER MENU
IsDistortion Stationary
Missing Horizontal or Vertical Lines. Or Missing Pixels?
No
Yes
Replace ULU-Board
A-1052-705-A
Replace BL-Board
A-1052-703-A
Replace BL-Board
A-1052-703-A
Replace BL-Board
A-1052-703-A
Replace LCD Panel
1-805-640-11Assembly
Video Distortion Troubleshooting Flowchart E
CTV-35 27
4. KLV-32M1 Troubleshooting Flowcharts
KLV-32M1 No Audio Troubleshooting Flowchart F
Is Audio Present at Speakers?
Check Center
Speaker Input
No
No Audio(Speaker Outputs)
Is Audio Missing on All Inputs ?
1,2,3 etc.
No
Yes
NOTE: Confirm all DC Voltages to circuit boards
before replacing
Connections OK?
No
Yes
Check Speaker
Connections on AU-Board
Check Individual
Audio Inputs
Check External Devices
and Connections
Swap Devices and connections
No Audio Inputs 1 & 2
**ONLY**
No Audio Input 3
**ONLY**
Replace H3-Board
A-1073-555-A
No Audio Inputs 4**ONLY**
No Audio Tuner Input
**ONLY**
Replace TUNER
8-598-593-60
No Audio Input 5
**ONLY**
TV OKRepair External
Devices orConnections
Good
Bad
Yes
F
Check Voltage
at CN9302/Pin 25
Is Voltage 9V
Present?
Yes
No
Repair Speaker Connections
Replace P-Board
A-1052-776-A
Replace AU-Board
A-1071-844-A
Replace AU-Board
A-1071-844-A
Replace ULU-Board
A-1052-705-A
Replace ULU-Board
A-1052-705-A
Replace ULU-Board
A-1052-705-A
No Audio Troubleshooting Flowchart F
CTV-35 28
Chapter 5 - KDL-32/42XBR950 Troubleshooting Flowcharts
KDL32/42XBR950 InitialContact Flowchart A
START
Does UnitTurn On?
Does Timer LED Ever
Flash Red?
Does Video Appear?
Yes
No
No
Go To Protect Troubleshooting
Flowchart C
No
Go To Video Troubleshooting
Flowchart D
Go To Audio Troubleshooting
Flowchart E
FINISHED
A
Go To No Power Troubleshooting
Flowchart B
Yes
Yes
Is Video Normal?
Yes
No Go To Video Troubleshooting
Flowchart D
Audio Present ?
Yes
No
No
Initial Contact Flowchart A
CTV-35 29
5. KDL-32/42XBR950 Troubleshooting Flowcharts
KDL32/42XBR950 “No Power” Troubleshooting Flowchart B
Unit Does Not Turn On
No
Yes
RED
>10sec
Power Circuits OK
StandbyLED Lit on
Media Box?
Led Flashing ?
Steady Green A/10 Seconds?
Yes
Replace MediaReceiver Unit
Standby LED on Panel Lit?
Check Panel Has AC Power
Replace G Board
Yes
Flashing Orange?
Yes Communication Error . Check A/V
Cables
Flashing Red?Go to Diagnostics Troubleshooting
Flowchart B
No
Yes
Turn Unit On
Go to Diagnostics Troubleshooting
Flowchart B
GREEN
HDCP Key ErrorMedia Receiver or
DES Board on Panel
No
Flashing Orange?
Yes
B
No Power Troubleshooting Flowchart B
CTV-35 30
5. KDL-32/42XBR950 Troubleshooting Flowcharts
KDL32/42XBR950 “Protect Mode” Troubleshooting Flowchart C
Protect Mode
Yes
Unit Not In Protect Moded
Standby LED Flashing Red?
C
No
See Diagnostics Table
MEDIA RECEIVER DISPLAY UNIT POSSIBLE CAUSE REMEDYSTEADY RED STEADY RED NORMAL - UNIT IN STANDBY NONESTEADY GREEN STEADY GREEN NORMAL - UNIT POWERED ON NONE
RED FLASHING 9X RED/GREEN FLASHING LCD BACKLIGHT OR INVERTER FAILURE REPLACE LCD PANELRED FLASHING 9X RED FLASHING 7X DC DETECT ON SPEAKER LINES K BOARD (32") K1 BOARD (42")RED FLASHING 9X RED FLASHING 6X LOW B+ DETECT REPLACE G BOARDRED FLASHING 9X RED FLASHING 4X EXCESSIVE PANEL TEMPERATURE REPLACE G BOARDRED FLASHING 10X STEADY RED OVER-VOLTAGE DETECT REPLACE MEDIA RECEIVERRED FLASHING 8X STEADY RED OVER-VOLTGE DETECT REPLACE MEDIA RECEIVERRED FLASHING 6X STEADY RED LOW-VOLTAGE DETECT REPLACE MEDIA RECEIVERRED FLASHING 4X STEADY RED FAN ROTATION ERROR REPLACE MEDIA RECEIVERORANGE FLASHING ORANGE FLASHING MEDIA CABLES UNPLUGGED CHECK MEDIA CABLESORANGE FLASHING NO LIGHT NO POWER TO DISPLAY GO TO NO POWER FLOWCHARTNO LIGHT ORANGE FLASHING NO POWER TO MEDIA RECEIVER REPLACE MEDIA RECEIVER
KDL32/42XBR950 SELF-DIAGNOSTICS DISPLAY
Protection Mode Troubleshooting Flowchart C
CTV-35 31
5. KDL-32/42XBR950 Troubleshooting Flowcharts
KDL32/42XBR950 Video Troubleshooting Flowchart D
Video Problem
Yes
No
DONE
Video Present ?
Distortion In Video?
Yes
D
No
NOTE: The backlight should be on . The unit normally shuts down and goes into
panel alarm protect .
PanelBacklight ON?
Can OSD Be Displayed?
No
Yes No
Yes
Media Receiver UnitPN T99861282
DES Board PN A1302861 A
or Media Receiver
Replace PanelPN T99861283 (32")
T99861284 (42")
Video Troubleshooting Flowchart D
CTV-35 32
5. KDL-32/42XBR950 Troubleshooting Flowcharts
KDL32/42XBR950 Audio Troubleshooting Flowchart E
Audio Problem
Yes
No
DONE
Audio Heard?
Distorted?Yes
E
No Standby LED Blinking 7X?
Audio Problem All Inputs?
No
Yes No
Yes
Media Receiver UnitPN T99861282
K Board (32")PN A1405907 CK1 Board (42")PN A1410280 A
DES BoardPN a1302861 AK Board (32")
PN A1405907 CK1 Board (42")PN A1410280 A
Audio Troubleshooting Flowchart E
CTV-35 1
AppendixKLV-26HG2 LCD Panel & Board Part# per Unit Serial Number
CTV-35 2
Appendix
KLV-26HG2 LCD Panel & Board Part# per Unit Serial Number Cont.
CTV-35 3
Appendix
Backlight Inverter Board(under Sheild)
U1-Board
MSB-BoardMSX-Board
TU-Board
A1-Board
LCD Logic Board(under G1-Board; Under sheild)
H2-Board
H1-Board
H3-Board MS-BoardB-Board UD-Board
G1-Board
KLV-26HG2 Board Location
Backlight Return Lines
KLV-26HG2 Board Location
CTV-35 4
Appendix
Backlight Inverter Board (under shield )
GL-Board
ULU-BoardH1-Board H2-Board
(behind ULU -Board)
H3-Board
P-Board(under shield )
AU-Board
Backlight Return Lines
(under shield )
LCD Logic Board (under shield ) BL-Board
KLV-32M1 Board Location
KLV-32M1 Board Location
CTV-35 5
Appendix
KDL-32/42XBR950 Board Location
KDL-32/42XBR950 Panel Board Location
CTV-35 6
Appendix
KLV-26HG2 Protection Mode Indications and Failure Areas
KLV-32M1 Protection Mode Indications and Failure Areas
CTV-35 7
Appendix
KDL-32/42XBR950 Protection Mode Indications and Failure Areas
CTV-35 8
Appendix
A1 BoardG1 Board
ACInput
Power 1 (ON)from B-Board
KLV-26HG2 Power Supply Overall Block
STBY 5Vto B-BoardMain Micro
To Inverter Board
F601 IC6002PrimaryPower Supply
IC6001Standby
5VPower Supply
16.5V
17V
6.8V
33V
16.5V
17V
PS4601
IC4601Secondary
PowerSupply
TunerBoard
5V Reg
D5V to B-Board
3.3V to B-BoardMemory
Stick
Audio Circuits
D3.3V to B-Board
12V Panel Volageto Logic Board
9V Reg
9V to B-BoardPS4602
30V Reg
PS6450
9V Reg
PS7001Audio
Amplifier
Power 3from B-Board
Power 4from B-Board
Power 2 from B-Board
MSB Board3.3V Reg
135\71\2
11
1\5
CN6004
CN6003
CN6006
13
24
25
5\7
1\2
11
CN4601
CN2801
CN4601
11
1
8
9
CN4603
CN2801
CN4603
PH6001
1
3
Q6007
Q6007
3.2V
3.2V
3.2V
3.2V
D6000
STBY 5V
Q4605
Q460623
KLV-26HG2 Block DiagramsKLV-26HG2 Block DiagramsPower Supply
CTV-35 9
Appendix
IC1006MainMicro
A1-Board
B-Board
IC1002Temp
IC7503Scan
Converter
I2C
IC4601Scondary
PowerSupply
Q460312V Reg
Q4605Panel 12V
Switch
IC46029V Reg
5V ALERT
3.3V ALERT
IC46035V Reg
16.5V DC IN_ALERT
BacklightInverterBoard
G1-Board
IC6002Primary Power
Supply
Backlight
Panel Detect
LCD PanelAssemble
Q4604D4607
D4611
D4612
R4643
R4642
R4644
13V3.3V
4V
12
16
16.5VUNREG 6V
3.1V
3V
2.75V
20
21
19
25
24
CN4603
KLV-26HG2 Protection Circuits
UART
CN6003
4 3CN4604
5 - 7 13
5 - 7 13CN4601
Power Good
DriveOutput
6
5
7
1
2
CN1003
R4645
Protection Circuits
CTV-35 10
Appendix
U1-Board
H2-Board
TU-Board
IC2803Switcher
Video 1
Video 2
IC2511Switcher
Y/CV
C
A1-Board B-Board
UD-BoardDVI
Component
IC2505Switcher
Y
CB
CR
C/CB
CR
VIDVID
IC3600V-Chip
IC3007CCP2
R G B
IC3302DRC
IC7503Scan
Converter
IC5802LCD Drive
LCD Panel Assemble
IC5804LVDS TX
Memory Stick Processing
MS Board Memory Stick
Interface
MSX Board
480i
1080i, 720p, 480p
User & Service Mode OSD Generator
Memory Stick OSD
Generator
V-Chip OSD
KLV-26HG2 Video Processing
RF
(MS) Digital Component Signal
IC1006MainMicro
CCP_SW
I2C
I2C
J3307B-Y
J3308R-Y
J3309Y
X500114.32MHz
X580133MHz
X5802100MHz
MS MS
Y/CV
UART
3.3V
3.3V2.5V
3.3V2.5V
9V
5V
9V
3.3V
3.3V
2.5V
NOTE: DRC 1.8V & 3.3V
Video Processing
CTV-35 11
Appendix
U1-Board
H2-Board
TU-Board
IC2803Switcher
Video 1
Video 2
A1-Board
UD-BoardDVI
Component
IC2801Switcher
RF
IC2802Switcher
Memory Stick Processing
MS Board
Memory Stick Interface
MSX Board
R
R
R
L
L
L
L/R
L/R
L/R
R
L
IC7002Audio
Control
R IC7007Audio
Amplifier
IC7011Audio
ProcessorL L
R
IC7400Comparato
r
IC7002HP Amp
Headphone Output
H2Board
J7004Audio
Var/FixOutput
KLV-26HG2 Audio Processing
RL
R L
SP-MuteFrom B-Board
Q7007
Q7005Q7006
HP-MuteFrom B-Board
Q7001Q7002
P-MuteFrom Secondary
Power SupplyIC4601
Q7018Q7019
5V
9V
9V
9V
9V
9V
12V
12VPS7001
Audio Processing
CTV-35 12
Appendix
KLV-32M1 Block DiagramsKLV-32M1 Block DiagramsPower Supply
AU-BoardGL-Board
Power 1 (ON)from BL-Board
KLV-32M1 Power Supply Overall Block
STBY 5Vto BL-BoardMain Micro
To Inverter Board
IC621PrimaryPower Supply
10.5V
30V
33V
16.5V
17V
IC7002Secondary
PowerSupply
Audio Amplifier
Tuner
IC661Standby
5VPower Supply
PH662
Power 3from B-Board
Power 4from B-Board
AU9V(Audio) Reg 9V to BL
-BoardReg 5V to ULU
-Board
9V Reg
9V Reg
5V Reg
Q681
Q661
Q7002
Q70033.2V
3.2V
3.2V
3.2V
D3.3V to BL-Board
5V Panel Voltage
D5V to BL-Board
Power 2 from B-Board
STBY 5V
PS7000
PS8500
PS7001
F601ACInput
D6000
RY601
TH601
1\5
5\81\212
15
14
CN652
CN651
5\8
30V Reg
1\2
12
15
14
B38
A38
CN7000
CN5504 A47
A43
B39
B45
B44
17
A39
A50
CN5504
CN5504
CN5500
STBY 5V
CTV-35 13
Appendix
Protection Circuits
IC1002MainMicro
AU-Board
BL-Board
IC1002Temp
IC7503Scan
Converter
I2C
IC7002Scondary
PowerSupply
Q7001D5VV SW
5V ALERT
3.3V ALERT
8.5V DC-IN ALERT
Backlight
Panel Detect
LCD PanelAssemble
D10025.6V
3.2V
4.8V
29
19
AU9V
UNREG 10.5V
3.3V
A41
B40
A47
KLV-32M1 Protection Circuits
D7026.2V
IC70019V Reg
D5504
R5583
R5580
9V
IC70009V Reg
IC70035V Reg
PS7000 IC70055V Reg
R5582
R5505
UART
17
27
Q7000D3.3V
SW
D5505 R5581
D70035.6V
D70023.9V
Q7003Panel 5V
SW
Panel 5V
GL-Board
IC621Primary Power
Supply11
12
BacklightInverterBoard
5 - 8 1 2CN651 CN653
CN652
A43
2
1
CN1004
CN1001
4.9V
3V
CTV-35 14
Appendix
Video Processing
IC9602Switcher
Video 1Video 2
IC9801Switcher
Y/CV
C
ULU-Board BL-Board
Y/CV
C/CB
CR
VIDVID
IC2003V-Chip
IC2006CCP2
R G B
IC3002DRC
IC4007Scan
Converter
IC4502LCD Drive
LCD Panel Assemble
IC4504LVDS TX
480i
1080i, 720p, 480p
User & Service Mode OSD Generator
V-Chip OSD
KLV-32M1 Video Processing
P-BoardHDMI
Component Input
IC9800Switcher
Y
CB
CR
H3-BoardVideo 3
TunerRF
AU-Board
CCP_SW
I2C
IC1002MainMicro
I2C
J3007B-Y
J3008R-Y
J3009Y
X400114.32MHz
X450133MHz
X4502100MHz
UART
9V
5V
9V
3.3V
3.3V2.5V
3.3V
3.3V
2.5V
3.3V2.5V
NOTE: DRC 1.8V & 3.3V
CTV-35 15
Appendix
Audio Processing
IC8001Audio
Selector
R IC8100Audio
ProcessorL
IC8600Switch
IC8601HP Amp
KLV-32M1 Audio Processing
R L
Q8601Q8602
HP-MuteFrom BL-Board
Q8603Q8604
TU-Board IC9602Switcher
ULU-Board
P-BoardHDMI
Component
IC9600Switcher
RF
IC9601Switcher
R
R
L
L
L/R
R
L
AU-Board
Video 1 L/R
Video 2 L/R
L/RH3-BoardVideo 3
HeadphoneOut
Center Speaker
Input
R L
TB9300
J9302
IC8602Amp
IC8002
Amp
IC8301
Amp
IC8501Audio
Amplifier
IC8500
Amp
SP-MuteFrom BL-
Board
Q8700
Q8300
Mute
Mute
Mute
Audio Var/Fix Output
Center Speaker
SW2
IC8300
EQ
IC8302SwitchIC8303Switch
EQ SWFrom BL-Board
9V
9V
9V
9V
9V9V
9V
9V
9V
9V
9V
30VPS8500
Q8001
9V 9V
Center Speaker
SW1Q8002
CTV-35 16
Appendix
KDV-32/42XBR950 Block Diagrams
UD BOARD
G BOARD
A BOARD
COMPOSITE VIDEO 1~3
COMPONENTVIDEO 5 & 6
DVI INPUT
FRONT AND REAR iLINK
QT BOARD
QM BOARD
DIC2 BOARD
M BOARD
MDB-XBR950L MEDIA RECEIVER BOX LDM32/4210 LCD DISPLAY
QH BOARD
MEMORY STICK INPUT
DES BOARD
TO LCD PANEL
G1 BOARD (32")G2 BOARD (42")
VIDEO DATA(WHITE CONNECTOR)
AUDIO DATA(BLACK CONNECTOR)
FIGURE 1-1 - KDL32/42XBR950 OVERALL BLOCK DIAGRAM CTV34.1-1 2/10/05
K BOARD (32")K1 BOARD (42")
Overall System Block Diagram
CTV-35 17
Appendix
PFC CIRCUIT
T6200
T6201
123
54
T6202
123
KDL42XBR950 ONLY
123449
RELAY LATCH Q6402 , Q6403
PFC LVP PROT
24V OVP
24V LVP
STBY6V SW 24V
CONVIC6500 T6500
RY6001 RY6000 D6000
D6500 D6504TH6000
D6300
D6301
D6302
D6303
D6304
D6305
CN6300
CN6301
CN6302
AC IN
G1 BOARD (32")
G2 BOARD (42")
CONVERTERIC6200 , Q6200 ,
Q6201
FIGURE 1-3 - DISPLAY POWER SUPPLY CTV34.1-3 7/11/05
16.5V
24V
PWR_ON HSTBY 6.5V
LCD Panel Power Supply
CTV-35 18
Appendix
IC3102IC3103
LVDS RXSPDIF TX
IC5001SPDIF TO PCM CONVERTER
IC5002PCM TO PWM PROOCESS
IC5003AUDIO
AMPLIFIER
RELAY
RELAY
CN5005
CENTERSPEAKER IN
K2 BOARD
(42" ONLY)
K BOARD (32")K1 BOARD 42")
DES BOARD
Q5004 ~ 5007DC DETECT
AUDIO DATA FROM MEDIA
RECEIVER
FIGURE 1-5 - AUDIO PROCESSING CTV34.1-5 7/11/05
Audio Processing
and i.Link are trademarks of Sony Electronics
2005 Sony Electronics, Inc.EMCSA - A Service Company
1 Sony DrivePark Ridge, New Jersey 07656
Reproduction in whole or part without written permission is prohibited. All rights reservedCTV-35 6/29/05Reproduction in whole or part without written permission is prohibited. All rights reservedCTV-35 6/29/05Reproduction in whole or part without written permission is prohibited. All rights reserved