PDP TV Training Manual - Mark`s Academy of Science
Contents
1. These examples show Y board errors because the Y electrodes run horizontally errors can often be seen across the screen and have a horizontal line 40 Y Buffer Board Troubleshooting e The Y Buffer Board time shares the Y drive signal to all the Y electrodes Y buffer failures can cause horizontal line errors or in some cases the entire panel to stay dark a The Y board is responsible for the address sustain and initialize functions Y board failures can cause the entire panel to be off This is because the Y electrodes are not being addressed properly Y board failures can sometimes be verified by visual inspection of the IC and FETs Additionally inspect the green fusible resistors looking for a brown or burned component Y board failures are much more common than X board failures A shorted component on the Y board may load down the Vs Vset and Vscan voltages If the Vset is low or missing the panel will not initialize creating image retention If the Vscan voltage is low the pixels cannot be selected creating a black screen And finally if the Vs voltage is missing or low the panel cannot be sustained creating a dark picture If the Vs Vset or Vscan voltages are low or missing verify the Y board is not loading down the line Measure the resistance of Vs Vscan and Vset connections reference to circuit ground A dead short or low resistance on any of these connections is an indication of a shorted component Another symptom is2. a ustain Initialize Board Initialize SS E LVDS Digital Signal Board Receiver oes 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 II trigger the supply voltage to create the distinctive X and Y drive signals 24 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 21 A defective logic board will often display the video signal but with the wrong color
3. Move Enter 5 Return New for 2009 is the addition of the E Manual or electronic owners manual in the form of a flash drive Specifications 50 Comparison SAMSUNG SAMSUNG SAMSUNG B450 50 B550 50 B650 50 PN50B450B1DXZA PN50B550T2FXZA PN50B650S1FXZA Size Inches 48 0 W x 12 4 H x 31 88 D 48 8 W X 11 4 H X 33 3 D 48 7 W X11 4 H X32 1 D Size Diagonal 50 Diagonal 50 Diagonal 50 pane Resolution 1365 x 768 1920 x 1080 1920 x 1080 Color System ATSC NTSC ATSC NTSC ATSC NTSC NE NN es ee Function 1 000 000 1 1 000 000 1 1 000 000 1 HDMI1 3a 3 port Wise Link USB2 0 Wise Link USB2 0 Additional Function Anynet HDMI CEC HDMI1 3a 4 port HDMI1 3a 4 port 3D Anynet HDMI CEC Anynet HDMI CEC 30w 1500 sau 10 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 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 aP SMPS Power Supply CR O 50 Models The SMPS power supply will vary slightly depending on the screen size Bo
4. Tuner Video Signal Path ATSC QAM IF i DTV S Half NIM DDR2 I F DDR2 128MB QAM VSB CVBS ere Local BUS For DCM L ARM11 600MHz SIF Decoder TSD amp PVR 150MHz ADC PE ATSC Open Cable SART STB MI COM IR Key Arsenal Chelsea Interrupt SD AFE S Card M Card IF WT61P6 0000 MP2 HD 1xH 264 HD Hotel Wall IE ANYNET 1xDivX HD DEBUG SP3232 I h Debug 2xAudio DSP Calm 2D amp 3D Graphic USB 2 0 2 Wise Link 2xUSB2 0 PCI a Divx e LVDS Tx UART 3 PCI BUS Mm ees RTL8100 LAN VSB amp QAM Decoder HDMI Decoder Display Panel Analog tuner information is decoded by the Half NIM tuner and transmitted to the Arsenal processor The video is converted to digital and fed to the Chelsea IC The Chelsea IC mixes in any OSD information or PIP video The digital video is processed to improve the picture quality then applied to the built in LVDS transmitter The LVDS circuit scrambles the data and sends the information to the Logic board which then controls the Y X and DATA boards 06 Composite and Component Video Signal Path DDR2 I F DDR2 128MB j Arsenal Chelsea Local BUS ONENAND For DCM CVBS1 S vHs1 SD AFE ARM11 600MHz SIF Decoder TSD amp PVR 150MHz ADC e ATSC Open Cable S Card M Card IF si IR Key VSB amp QAM Decoder MP2 HD 1xH 264 HD HDMI Decoder 1xDivX HD Hotel Wall 2xAudio DSP Calm DEBUG SP3232 Component1 e 2D
5. amp 3D Graphic 2xUSB2 0 PCI USB 2 0 2 LVDS Tx Component2 e UART 3 IIC 4 PCI BUS RTL8100 lt gt LAN wy LVDS DATA Display Pand 1080P Since both these sources are analog the Arsenal processor selects the source and converts the Analog video to digital The sync information is stripped from video information The digital video is fed to the Chelsea and is processed exactly the same as the tuner video 57 PC Video Signal Path 400MHz Local BUS ONENAND For DCM ARM11 600MHz SIF Decoder TSD amp PVR UART e 150MHz ADC ATSC Open Cable _ Arsenal Chelsea Interrupt SD AFE S Card M Card IF biol e e MP2 HD 1xH 264 HD Hotel Wall UART Wia ANYNET 1xDivX HD DEBUG SP3232 i h Debug 2xAudio DSP Calm 2D amp 3D Graphic USB 2 0 2 Wise Link 2xUSB2 0 PCI Divx LVDS Tx UART 3 PCI BUS HICKS RTL8100 lt gt LAN ay LVDS Logie Eza DATA VSB amp QAM Decoder HDMI Decoder Display Panel PC Video in RGB format is converted to digital The only variation is the sync signal is transmitted separately so it does not need to be stripped from the video signal The digital video is fed to the Chelsea and is processed exactly the same as the tuner video 08 HDMI Video Signal Path DDR21 F DDR2 128MB 400MHz Local BUS ONENAND For DCM 1GB Arsenal Chelsea Interrupt S
6. el Esa DATA Display Pand Video problems can be isolated by accessing the onscreen display which is generated from the Chelsea IC If the OSD message is displayed properly the problem is before the Chelsea IC If the OSD image is distorted the problem can be the Logic board or the panel itself Additional test patterns may be available in the service mode under Control then select FBE Pattern The FBE test patterns offer a In addition to these the Logic board has test patterns which will isolate the main board wider range of colors and luminance levels 60 Main Board Troubleshooting The Main board processes all the video sources converting the video to the resolution of the panel This includes Onscreen display generation and PIP where applicable The quickest way to test the video circuit is by pressing the menu button if the menu is displayed without error the problem is not the panel X Y address or SMPS boards If the menu is displayed properly the source should be suspected first a The main board also provides the operating system This means all operation functions are controlled by this board Main board failures can be specific to a single input or all sources Access the Onscreen display to generate a reference picture that can be used to verify the operation of the Video processor If the OSD image is correct in all aspects the source video is suspected Main board problems can often be disguis
7. gt 1 TV Field Operating 10 sub field 1TV field 1frame gt 1 60sec 1TY Field 600 sub field per 1sec gt 600Hz 105F Removes the blur from fast scenes 9S 2 op SF 7SE FS with a lot of movement to provide ijid eee ala a clearer picture 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 AC Drive System 10 Sub Fields Y Electrode X Electrode a e ji Address Data Electrode The sustain period duration determines the pixel brightness A total of 1024 levels of pixel brightness are available Half Brightness is sustain step 9 Binary 512 on and sustain step 10 off a pre 9 6ue yuGiuq a Gue JuGuq evel inside en 8 sub field 10 sub field inside 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 10 Subfield Drive Process e Changing from 8 subfields to 10 subfields increases the number of color choices from 28 256 to 210 1024 7 Another advantage of the 10 sub field system is smoother video linearity brighter pi
8. 69 Panel Troubleshooting ze 3 A Sorzvonta y a gt pa m gt A J e f T pi 3 pad a OF boa N ia P ENA N A D A bi Hef boai P Q he f a FE Plasma Panel Failure Examples Plasma Panel failure can usually be identified by observation Single sub pixel columns or rows that are black or white always are panel failures Other lines or lines that vary with content are almost never panel failures Individual pixel errors are almost always panel related A panel defect similar to the example here is caused by damage to the vacuum port on the side Individual pixel failure does not necessarily require panel replacement The table below shows the pixel specification As you can see depending on the screen size and number of defective pixels determine if the product is covered by warranty 70 Alignment Procedures Using the Customer Remote 1 Turn the power off and set to stand by mode 2 Press the remote buttons in this order POWER OFF MUTE 1 8 2 POWER ON to turn the set on 3 The set turns on and enters service mode This may take approximately 20 seconds 4 Press the Power button to exit and store data in memory lf you fail to enter service mode repeat steps 1 and 2 above 5 Initial SERVICE MODE DISPLAY State Project Model Model Code DEE eee No i E a ee a Pee ass as as Che RI f e Ts Light Effect inch Option Bytes Di ee Exhibition Mod
9. Audio AMP STA335BWS 12S_IN 12S M WM8593 S W A D D A 2 AMP As stated earlier all the audio processing is done by the Main PCB There are two ways to test operation of the audio circuit Set the volume to 30 and verify the speakers have not been set to off and verify the melody has been set to on Turn the TV off and on if you hear either the startup or turn off melodies clearly this indicates the audio circuit is working properly Under the setup menu there is an audio test which will also play a melody Once again if the melody is heard clearly the circuit is working If no sound is heard or the audio is distorted verify the speakers and speaker connections 65 Panel Explanation X Electrode lt x 42 Panel Board Layout The SP series panels are capable of Enhanced definition ED reproduction Input signals are displayed in 480p format The X board drives the X electrodes which run horizontally across the panel The Y Board drives the Y electrodes which also run horizontally across the panel The Y electrodes contain more dynamic data so a separate buffer system is used to multiplex the signal Note not all units use upper and lower buffers some units combine both boards into one The E F and G boards drive the data electrodes which run from the bottom of the panel to the top The data boards select the individual pixels 66 Panel Explanation lt E lt lt lt E
10. The Arsenal IC converts the signal to digital then feeds the signal to the WM8593 audio processor Analog audio sources are converted to digital by the WM85963 processor This processor applies some equalization then converts the digital signal to analog The analog signal is amplified by the STA339B IC then fed to the speaker array Besides the speaker output the ATSC audio is converted to SPDIF format The SPDIF optical signal can be connected to a home theater unit for Dolby digital playback The optical jack outputs full Dolby digital mode only when using the ATSC tuner is selected and a HD program is being viewed HDMI audio takes a similar path Audio from an external device such as the component input is converted to digital by the audio processor The digital signal is equalized converted back to analog then takes the same output path that was previously described 64 Audio Circuit Troubleshooting ATSC QAM IF Half NIM lie DDR2 I F QAM VSB CVBS ia 400MHz CVBS1 S VHS1 1GB 9095 Arsenal Chelsea UART STB MI COM IR Key AV2 In CVBS2 SD AFE ARM11 600MHz WT61P6 000 OJO SIF Decoder TSD amp PVR Hotel Wall TARI l S Card M Card IF l Component1 YPbPr1 VSB amp QAM Decoder e MP2 HD 1xH 264 HD USB 2 0 2 i i HDMI Decoder 1xDivX HD i oi 2xAudio DSP Calm Component2 2D amp 3D Graphic O 2xUSB2 0 PCI LVDS Tx UART 3 RGB HV C4 PC of je PC Audio S PDIF optical SIL9287 12S
11. 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 a 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 16 Power Supply Adjustments 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
12. lt lt lt ESS x E E E E lt 4 lt E lt lt E lt od lt lt E lt 50 and greater Panel Board Layout an i HP series panels operate at a higher resolution 720p rather than 480p The higher resolution requires more data boards to select the greater number of pixels The H l and J boards select the upper portion of the panel the E F and G boards select the lower half of the panel 6 Data Address Board Data boards are behind shields and can not be replaced in many models The address boards also known as Data or Buffer boards are only responsible for selecting which sub pixel will be used a In many cases on the new Plasma televisions the data boards are not replaceable If there is a failure the panel will require replacement 68 Panel Explanation ao zoo Emeieney a Black Cell Sa ft lt E gt RA es p al a Brightness 30 increase Black 20 increase Structure Sub Pixels Electr de Address Electrodes Segment ITO Stripe ITO N Discharge Gas Xe11 He35 Ne Bal Xe11 He51 Ne Bal 5 increase MPR V6 K1 MgO Reflection Reflections are Brightness Non Black Stripe B S Black Stripe Design decreased from 12 0 9 5 20 increase The new E Panel utilizes a different mixture of gases and a newly designed panel to increase brightness and black levels while decreasing power consumption and reducing the amount of ambient light reflections
13. or a smeared picture If you can recognize the video i SL omy Hii Dur A mF iil r pattern but there are ie i oe ot pr have errors in color Wana REE e ue III a S for power smearing or jittering ARD iby eel ee ed supply monitoring suspect that the Logic ak IIS ae ln awk o a and to show data board is defective UPAS as i je aa a ae bus activity 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 a 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 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 22 Isolating the Logic Board from the Noise or ines Weenies onscreen Main Boa rd the screen is lit and the error varies with content Test Proced
14. the circuit ALWAYS check the service manual for the correct PS_ON and GND connections i i Logic PCB Short pins 3 amp 4 on the Logic Board with a 4 pin test terminal The SMPS can be forced on and the test patterns that reside on the logic PCB can be displayed using this method Before jumping the PS_ON to ground verify the connections in the service manual Logic Board Forced Operation Note This test function may not be available on all models e Step 1 With the Main PCB removed short pins 1 amp 5 on the 24P ribbon cable to the SMPS to turn the panel on This will turn on the secondary voltages of the SMPS Shorting the POWER ON ela to ground is the same as the power on from the power switch Step 2 Carefully short pins 5 amp 6 of the 6 terminal test point on the Logic PCB together When the panel is powered on the PDP will Short the PS_ON and GND pins ee ata es the ea test dope stored on the Logic on the ribbon cable connector oard that would normally be accessed only through the service menu This will force the logic board into a loop where the internal from Main Board to SMPS 24P test patterns will be displayed in sequence Step 3 After the proper pins are shorted apply power to the AC Logic PCB input to the panel The TV will power up by itself and if all is well E ji with the logic X Y buffers and address boards the panel will play ue Lu wi the test pattern loop If everything
15. using the sustain pulses 34 Y Board Sustain Pulse Low Medium High Brightness Brightness Brightness ls ai ee ee al Only the X and Y boards are responsible for the sustain pulses a Only the X and Y boards are responsible for the sustain pulses As the number of pulses increase to the individule sub pixels the brightness and color saturation increases as well 35 Navigation Address Sustain 7 sustain 2 Sustain 3 Sustain X Initialize Stop Phosphor Waveforms vig Y Sustain Pulses Vs Y Waveform Y Scan Pulse VWecan IT initialize Vs Ve x Sustain Pulse UC ANN X Va Address q_ Vga The Y Main is responsible to initialize or erase the charge from the sub pixel and prime it for use again Y Board Troubleshooting The Y board is responsible for the address sustain and initialize functions Y board failures can cause the entire panel to be off have a dark picture or show symptoms similar to image retention a The Y board is responsible for the address sustain and initialize functions Y board failures can cause the entire panel to be off This is because the Y electrodes are not being addressed properly Y board failures can sometimes be verified by visual inspection of the IC and FETs Additionally inspect the green fusible resistors looking for a brown or burned component Y board failures are much more common than X board failures A shorted component on the Y board
16. 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 bulletin 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 Recommended Troubleshooting amp Repairing Guide i oon TELEVISION LCD TELEVISION o VI 0 Collectionoi LCD siggy V20 LCD TV Repair ie fe TV Repair Tips g fay Tips amp Case Histories EUL LCD LED amp 3D TV Plasma amp 3D TV uae Repair Membership Site jeu Repair Membership BACE AA wel Site ee pri AL 027 OES B pirtin Pann Projection TV amp Troubleshooting amp mee DLP LCD Projector c Repairing LCD TV Repair Membership Site DA Guide i jj 2 Plasma TV Repair Guide Toas LCD TV Repair Display Fault vale Secrets Revealed Troubleshooting Basic A FI 40 True Repair Case i i 3 Histories LCD Monitor Repair eeu Vol 1 10 Trus Repair Guide Case Histories of LCD Monit
17. 5 SMPS DC CN804 ons40q CN5001 CN5405 pa m Y MAIN CN5505 CN5502 CN5501 E P N5510 CN5002 CN5500 CN5502 Y BUFFER LOW d nels ame on H G DATA E DATA DATA CN2508 CN2509 CNT10 N101 CN801 kag CN1501 a The overall wiring diagram will vary depending if the Y main has replaceable buffers or not Video Circuit Explanation ATSC QAM IF l DTV S Half NI M QAM VSB CVBS AV1 In CVBS1 S VHS1 Arsenal SD AFE SIF Decoder 150MHz ADC AV2 D VSB amp QAM Decoder HDMI Decoder Component1 YPbPr1 Component2 YPbPr2 1D TMDS 4x1 SW SIL9287 Chelsea e ARM11 600MHz TSD amp PVR ATSC Open Cable S Card M Card IF MP2 HD 1xH 264 HD 1xDivX HD e 2xAudio DSP Calm 2D amp 3D Graphic 2xUSB2 0 PCI LVDS Tx UART 3 1C 4 DDR21 F DDR2 128MB 400MHz Local BUS ONENAND For DCM 1GB VART STB MI COM IR Key 000 WT61P6 Hotel Wall UART I ANYNET DEBUG SP3232 I h Debug USB 2 0 2 Wise Link Divx PCI BUS RTL8100 lt gt LAN LVDS Eza DATA Display Pand 2009 PDP TV uses a pair of Video processors The Arsenal IC is the ATSC decoder HDMI decoder and selects the various input sources The Chelsea IC processes the video and also acts as the main CPU The Chelsea IC generates the onscreen display and includes an LVDS transmitter 55
18. D AFE SIF Decoder S Card M Card IF MP2 HD 1xH 264 HD Hotel Wall Wie ANYNET 1xDivX HD DEBUG SP3232 i Debug 2xAudio DSP Calm 2D amp 3D Graphic USB 2 0 2 Wise Link 2xUSB2 0 PCI Divx LVDS Tx UART 3 PCI BUS e IIC 4 RTL8100 lt gt LAN ay VSB amp QAM Decoder HDMI Decoder e ARM11 600MHz e 150MHz ADC ATSC Open Cable STB MICOM ey PA a 000 Display Panel The Arsenal IC selects one of the 4 HDMI inputs Since this signal is digital no conversion is required however the Arsenal IC does verify the content conforms to HDCP format The video signal is stripped from the data stream and fed to the Chelsea IC From here the process is exactly the same 59 Video Circuit Troubleshooting ATSC QAM IF I DTV S Half NI M QAM VSB CVBS AVI In CVBS1 S VHS1 OO Component1 YPbPri Component2 YPbPr2 TMDS axl SW SIL9287 Arsenal SD AFE e SIF Decoder 150MHz ADC VSB amp QAM Decoder HDMI Decoder Chelsea ARM11 600MHz TSD amp PVR ATSC Open Cable S Card M Card IF MP2 HD 1xH 264 HD 1xDivX HD 2xAudio DSP Calm 2D amp 3D Graphic e 2xUSB2 0 PCI LVDS Tx UART 3 IC 4 DDR2 I F DDR2 128MB 400MHz VARI STB MICOM IR Key 000 0 WT61P6 Hotel Wall DEBUG sp3232 d E Debug USB 2 0 2 Wise Link Divx PCI BUS RTL8100 lt gt LAN LVDS
19. In this example the sustain signal from the X board is low or missing Verify operation of the X board by disconnecting the power supply cable to the X board If the other boards are working the picture will be dark If the symptom changes with the X power supply unplugged the problem is NOT the X board a In this example the sustain signal from the X board is low or missing If the symptom changes with the X power supply unplugged the problem is NOT the X board 50 X board Failure Examples 4 3 pillar bar 4 3 pillar bar shadow shadow In this example the initialize signal is low or missing creating image retention Troubleshoot the X Board by verifying the Plus and Minus Vs voltage levels match the values printed on the panel label a Troubleshoot the X Board by verifying the Plus and Minus Vs voltage levels match the values printed on the panel label 51 aca clu Board NTP3200 TU601 ATSC HALF NIM B550 650 Main Board The main board configuration will vary slightly from model to model but the number of input connections will be the same 52 B450 Overall Wiring lt 50 Overall Wiring gt Y MAIN SCAN HIGH JcN LOGIC BOARD ento MAIN BOARD cnar CN20 CNED1 1I6 SPEAKER The overall wiring diagram will vary depending if the Y main has replaceable buffers or not 53 B550 650 Overall Wiring CN5401 Y BUFFER UP CN803 cnsaod CN5404 CN500
20. a picture defect running horizontally across the screen This is because the Y electrodes run across the screen A bar or picture defective that is localized to the top or bottom of the screen 41 Y Buffer Board Failure Examples Upper Y Buffer e Note 1 Some models Error merge the upper and lower Y buffers to a single board Note 2 Some 2008 models merge the Y board and the Y buffers into a single board On older style Plasma TV s the upper and lower buffer can be replaced separately With the introduction of a one piece buffer both upper and lower are replaced as an assembly In the case of the Y Main with built in buffer circuits the entire Y Main is replaced Y Buffer Connection Errors e f the connection from the Y buffer board to the panel is not installed properly the panel might show thin parallel lines This is NOT a panel or a board error a The connection between the buffer and the panel can cause these types of problems The connections can be cleaned and reseated but make sure the power is removed before attempting 43 X Board Configuration There may be variations on the type of X board used in the TV however their function is the same 44 X Board Circuit Explanation From From SMPS Board SMPS Board Ve 100V Vs 205V The X board contains a series of FET drive transistors The Vs and Ve supplies are connected to these FETs The Vs supply is approximately 200V and the V
21. ard failures can cause the entire panel to be off This is because the Y electrodes are not being addressed properly Y board failures can sometimes be verified by visual inspection of the IC and FETs Additionally inspect the green fusible resistors looking for a brown or burned component Y board failures are much more common than X board failures A shorted component on the Y board may load down the Vs Vset and Vscan voltages If the Vset is low or missing the panel will not initialize creating image retention If the Vscan voltage is low the pixels cannot be selected creating a black screen And finally if the Vs voltage is missing or low the panel cannot be sustained creating a dark picture If the Vs Vset or Vscan voltages are low or missing verify the Y board is not loading down the line Measure the resistance of Vs Vscan and Vset connections reference to circuit ground A dead short or low resistance on any of these connections is an indication of a shorted component Another symptom is a picture defect running horizontally across the screen This is because the Y electrodes run across the screen A bar or picture defective that is localized to the top or bottom of the screen 39 Y Board Failure Examples each error contains a horizontal line These examples show Y board errors because the Y electrodes run horizontally errors can often be seen across the screen e Another Y board error can be an entirely black screen a
22. at sinks The X board signal discharges the pixel before each new line of video and controls the sustain time of the pixels Sustain time which equates to pixel brightness is controlled by the number of sustain pulses The X board signal does not change and is applied to all pixels 45 Mavigation Address Sustain 1 sustain 2 Sustain 3 sustain X Initialize Stop Waveforms Vset Y Su in Pulses y Y Scan Pulse w X Waveform Ve Vp dy Address G Like the Y Main the X Main is responsible for lighting the selected sub pixel to a specific illumination through the number of sustain pulses used 46 Navigation Address Sustain 7 sustain 2 Sustain 3 Sustain X initialize Stop Waveforms Y Sustain Pulses Y Waveform Y Scan Pulse Wacan Vs Wai Vs Ve X Sustain Pulse 4 Va Address qa The X Main is also responsible to initialize or erase the charge from the sub pixel and prime it for use again However the X board has nothing to do during the address portion of the cycle 4 7 X Board Troubleshooting From From SMPS Board SMPS Board Vs 205V Sustain Pulse e The X board is responsible for the sustain and initialize processes The sustain and initialize signals are created by switching the plus and minus Vs voltages The switching signal from the logic board triggers the respective FETs on and off This creates the unique waveforms In general X board failures occur a
23. cture and more color choices O Brightness ate Power consumption F W Back brightness Contrast ratio Bright room Color Gamut Color Temperature Coordinates F W azi New E Panel 430cd m 590W 400cd m28650W 180cd m2Q590W 170cd m2 650W 0 3cd m2 0 4cd m 110 1 87 1 12 0 12 0 82 89 82 89 9500K 0 285 0 290 500cd m2 540W 430cd m2 490W 203cd m2 540W 180cd m2 500W 0 15cd m2 150 1 9 5 79 94 lt 460cd m2 540W 400cd m2 500W 170cd m2 540W 170cd m 540W 0 15cd m2 150 1 9 5 79 94 lt 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 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 Connecting to portable device New portable device is connected Device MemoRive Media Play Content Library E Manual Softwore Upgrade
24. d FETs Additionally inspect the green fusible resistors looking for a brown or burned component Y board failures are much more common than X board failures A shorted component on the Y board may load down the Vs Vset and Vscan voltages If the Vset is low or missing the panel will not initialize creating image retention If the Vscan voltage is low the pixels cannot be selected creating a black screen And finally if the Vs voltage is missing or low the panel cannot be sustained creating a dark picture If the Vs Vset or Vscan voltages are low or missing verify the Y board is not loading down the line Measure the resistance of Vs Vscan and Vset connections reference to circuit ground A dead short or low resistance on any of these connections is an indication of a shorted component Another symptom is a picture defect running horizontally across the screen This is because the Y electrodes run across the screen A bar or picture defective that is localized to the top or bottom of the screen 38 Y Board Troubleshooting e Another test procedure is to unplug the unit and measure the resistance of Vsc Vs and Vs SMPS inputs referenced to ground Low or zero resistance indicates a shorted FET As with the X board the fast switching and high current requirements can cause the FET s to explode or crack visual inspection can often show this type of damage The Y board is responsible for the address sustain and initialize functions Y bo
25. e DS m su gg Alignments should be performed whenever a panel is replaced or the SMPS or Y Main board Alignments such as Option Bytes and White balance should at least be checked for accuracy 11 Alignment Procedures Option Bytes Light Effect Inch Exhibition Mode Option Bytes a Incorrect settings in the type value can cause the picture size to be incorrect or the picture to be dark Incorrect settings in the Model Value can cause features to be disabled or enabled incorrectly 12 Alignment Procedures Mesurem noi t CA 21 10 THK IN APCD Proper white balance color temperature measured in degrees Kelvin can only be achieved with the use of a colorimeter 73 Sub Boghiness 128 inp w ADC Target d aie ui Ea A irast 128 che 512 l 4 Movie IN OR 2 I Sub_Brt Fix Gamma OFF When performing the white balance adjustment in the service mode the combination of Dynamic picture and a color temperature of Cool 1 is defaulted to When doing this adjustment the high light and low light levels must track at 12 000 degrees K 13 Alignment Procedures White Balance Sub Brightness R Offset G Offset B Offset Sub Contrast R Gain G Gain B Gain em ADC WB sub menu of service mode Another alignment that should at least be checked is the white balance settings Input a grayscale stair step pattern and verify the correct number of steps is present Also be sure the picture s
26. e supply is approximately 100v The Logic PCB triggers the FETs creating the X Drive waveform The X Drive waveform is the same regardless of the video input signal Variations in the Ve voltage may not be immediately noticeable on normal video but eventually the unit will display impurities Apply a white pattern and look for red dots in the pattern this indicates an error in the Ve supply Voltage The X board contains a series of FET drive transistors The Vs and Ve supplies are connected to these FETs The Vs supply is approximately 200V and the Ve supply is approximately 100v The Logic PCB triggers the FETs creating the X Drive waveform The X Drive waveform is the same regardless of the video input signal Variations in the Ve voltage may not be immediately noticeable on normal video but eventually the unit will display impurities Apply a white pattern and look for red dots in the pattern this indicates an error in the Ve supply Voltage The X board generates the initialize and sustain signals to the X electrodes If the X board is defective there will be no luminance and the pixels cannot be initialized No luminance will be shown as an n extremely dark gray picture that may only be seen with the room lighting off No initialization may cause the picture to show a reddish hue in spots with the redness filling the entire screen over time X board failure can often be determined by visual inspection of the transistors on the he
27. ed by a defective or improperly connected LVDS cable This cable transfers the video in digital format to the T CON board Improper connections here can cause missing data bits which will show a wide range of symptoms Use the logic board test patterns to verify the problem is after the main board or before 61 Main Board Failure Symptoms Main Board errors are similar to logic errors but the problem can be on a single source such as the tuner If the Menu also shows the defect the main board is suspected a The main board also provides the operating system This means all operation functions are controlled by this board Main board failures can be specific to a single input or all sources Access the Onscreen display to generate a reference picture that can be used to verify the operation of the Video processor If the OSD image is correct in all aspects the source video is suspected Main board problems can often be disguised by a defective or improperly connected LVDS cable This cable transfers the video in digital format to the T CON board Improper connections here can cause missing data bits which will show a wide range of symptoms Use the logic board test patterns to verify the problem is after the main board or before 62 Main Board Failure Symptoms Original Image Image on Screen e Green lines or green screen can be a defective main board but can also be caused by a defective LVDS cable to the logic board e Pixe
28. hows only black white and shades of gray If the picture looks reddish or bluish the gain or offset values may need to be adjusted 74
29. lization can be caused by the main board but is more commonly a source error a The main board also provides the operating system This means all operation functions are controlled by this board Main board failures can be specific to a single input or all sources Access the Onscreen display to generate a reference picture that can be used to verify the operation of the Video processor If the OSD image is correct in all aspects the source video is suspected Main board problems can often be disguised by a defective or improperly connected LVDS cable This cable transfers the video in digital format to the T CON board Improper connections here can cause missing data bits which will show a wide range of symptoms Use the logic board test patterns to verify the problem is after the main board or before 63 Audio Circuit Explanation ATSC QAM I F fn Half NI M DDR2 I F QAM VSB CVBS ADD Mia Local BUS ONENAND For DCM AV1 In CVBS1 S VHS1 1GB Chelsea 9000 ARM11 600MHz 150MHz ADC ATSC Open Cable DEBUG SP3232 Component1 S Card M Card IF VSB amp QAM Decoder MP2 HD 1xH 264 HD USB 2 0 2 HDMI Decoder 1xDivX HD Component2 e 2xAudio DSP Calm 2D amp 3D Graphic e 2xUSB2 0 PCI Optical JDM 4x1 SW SIL9287 WM8593 S W A D D A 2 AMP All audio is processed by the main PCB The ATSC tuner strips the audio data and feeds the signal to the Arsenal IC
30. ll over the screen X board failures do not usually vary with video content a The X board is responsible for the sustain and initialize processes If the sustain pulse is missing or diminished the symptom on screen will be dark video Apply a reference signal such as color bars you might be able to see luminance variations between the bright and dark sides of the screen A dark picture all over the screen can be related to a defective X board Another X board Failure symptom is related to initializing the panel If the initialize pulse is missing or diminished the previous image will not be erased with scene changes If the panel is not initialized properly the symptom will be image retention all over the screen The X board output is applied to every sub pixel on the screen An X board failure will not be localized and all over the screen X board Failures can often be verified by visual inspection of the FETs and fuse resistors A cracked FET or a burned fuse resistor is an indication of a defective X Board 48 X Board Troubleshooting As with any electronic device inspect the PC board for damaged or overheated components The fast switching and high current requirements can cause the FET s to explode or crack a As with any electronic device inspect the PC board for damaged or overheated components The fast switching and high current requirements can cause the FET s to explode or crack 49 X board Failure Examples
31. looks normal the possible cae ae problem is the main board which is the only thing left not in the Circuit ge el aa i ALWAYS check the service manual for the correct PS_ON and GND gi Vu connections PI AI Short pins 5 amp 6 on the Logic PCB with a 6 pin test terminal The patterns that will be displayed from the logic PCB are located after the LVDS cable If the patterns look normal the SMPS logic X Y buffers and panel are all working properly Use this method in cases where the video is so distorted that the menus can not be seen to access the test patterns using the service mode 26 Logic Board Failure Examples e As you can see each of the examples shows the panel illuminated but displays incorrect video a Logic PCB failures The test patterns located on the Logic board are being displayed along with the incoming video 2 Logic Board Failure Examples The error can be incorrect color or noise mixed into the active video a Logic PCB failures The test patterns located on the Logic board are being displayed along with the incoming video 28 Logic Board Failure Examples e In these examples the error is not stationary and changes with content a Logic PCB failures 29 Logic Board Failure Examples To Digital Board Besides video errors the logic board is also tied into the power on process The 5VDC line is routed to the Logic PCB as well as the Mai
32. lures usually cause the entire panel to be dark Y board failures can sometimes be verified by visual inspection of the IC and FETs The Y board operates similarly to the X board with some variations The Y board output signal is opposite in polarity to the X Board signal The Y Board signal is specific for each pixel Pixels that are off do not receive a signal Pixel brightness is controlled by varying the number of sustain pulses Because the Y board signal is more detailed than the X board signal is output to a pair of multiplexing boards The upper and lower Y buffers divide the screen in half vertically The Y Buffer Boards apply the address waveform to the Y terminals of the panel The Y Board signal varies depending on the input video Each Y electrode gets a unique signal this means that the Y signal is applied through an upper and lower buffer board 32 Mavigation Address Sustain 1 Sustain 2 sustain 3 Sustain X Initialize Stop Waveforms Vset Y Waveform Y Scan Pulse Vs Y Sustain Pulses Vscan The Y Main is responsible for the Address pulse to determine which sub pixel will be used 33 Navigation Address Sustain 7 sustain 2 Sustain 3 Sustain X Initialize Stop ni mag Phosphor Feb Waveforms Vset Y Waveform Ve Y Scan Pulse scan X Wavaform Ve A Sustain Pulse Address The Y main is responsible for lighting the selected sub pixel to a specific illumination by
33. may load down the Vs Vset and Vscan voltages If the Vset is low or missing the panel will not initialize creating image retention If the Vscan voltage is low the pixels cannot be selected creating a black screen And finally if the Vs voltage is missing or low the panel cannot be sustained creating a dark picture If the Vs Vset or Vscan voltages are low or missing verify the Y board is not loading down the line Measure the resistance of Vs Vscan and Vset connections reference to circuit ground A dead short or low resistance on any of these connections is an indication of a shorted component Another symptom is a picture defect running horizontally across the screen This is because the Y electrodes run across the screen A bar or picture defective that is localized to the top or bottom of the screen 3 Y Board Troubleshooting Check the heat sinks they should be warm not hot To troubleshoot the Y board verify the positive Vs voltage the negative Vs voltage and the Vsc voltage The voltage should match the value printed on the panel If any of the voltages are low or missing unplug the Y board to see if the Y board is loading down the power supply 38 The Y board is responsible for the address sustain and initialize functions Y board failures can cause the entire panel to be off This is because the Y electrodes are not being addressed properly Y board failures can sometimes be verified by visual inspection of the IC an
34. 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 17 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 VA typically 75VDC 94VDC D6VDC 8 2VDC D3 3VDC 4 7VDC 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 a 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
35. n PCB If the relay cycles repeatedly or will not close verify the Standby 5V supply is not being pulled down by a defective Logic Board a If the relay cycles repeatedly or will not close verify the Standby 5VDC supply is not being pulled down by a defective Logic Board 30 Y Board Configuration B y Y Main with replaceable One piece Y buffer boards Main buffer board a Y PCB configurations will vary depending on screen size The replaceable buffer PCB style will be a separate Y Main and a one piece upper and lower buffer PCB The non replaceable buffer styles will require the Y Main to be replaced in the event the buffer circuit fails 31 Y Board Circuit Explanation This Y Main board maintains the sustain voltage waveform including ERC the VScan bias and generates the Y rising falling ramp waveform The Y Buffer Boards apply the scan waveform to the Y terminals of the panel Four scan driver ICs on each Y driver board determine when a single scan occurs The Y Board signal varies depending on the input video Failure can sometimes be verified by visual inspection of the IC and FETs a This Y Main board maintains the sustain voltage waveform the initialize waveform and generates the Y rising falling ramp waveforms The wave shape that is output to the respective Y electrodes varies depending on luminance levels and whether that pixel is actually selected Y board fai
36. or croblsonting amp ag ri SMPS Switch Mode Testing Electronic Law Power Supply Repair Components like a Pro ogg Guide wom i For Beginner aera Laptop Motherboard a Laptop Repair x Repair Course ga NA am Video Collection Table of Contents New Features Specifications and Introduction to 2009 PDP Model Comparison Power Supply Power Supply Troubleshootin Logic Board Logic Board Troubleshootin Y Board i Y Board Troubleshootin X Board 6 X Board Troubleshootin 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 a Introduction to 2009 PDP This presentation will introduce the 2009 Plasma televisions showing the new specifications features and the new Energy Star rated panels ENERGY STAR 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 Slim Design 2009 e Slim amp Light 50 B850 ab 73 6 Lbs 50 B550 Like the new 2009 LCD models the Plasma models have gotten lighter thinner and more energy efficient 600Hz Subfield Motion The picture is comprised of 60 TV Fields 1sec 60 TV Fields
37. rd 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 14 Switch Mode Power Supply Troubleshooting v 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 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 15 switch Mode Power Supply Failure Examples One possible symptom is defects in the video such
38. service mode under PDP Option To troubleshoot video problems or to make sure every board after the main board is working properly the internal test patterns can be accessed in the logic board then move to the main board test patterns Even the customer menu s can be used as a test pattern 24 Logic Board Forced Operation Note This test function may not be available on all models Step 1 With the Main PCB removed short pins 1 amp 5 on the 24P ribbon cable to the SMPS from the main PCB to turn the panel on This will turn on the secondary voltages of the SMPS Shorting the POWER ON connection to ground is the same as the power on from the power switch Step 2 Carefully short pins 3 amp 4 of the quad connector on the Logic PCB together When the panel is powered on the PDP will Short the PS_ON and GND pins automatically play the internal test patterns stored on the Logic on the ribbon cable connector board that would normally be accessed only through the service from Main Board to SMPS 24P menu This will force the logic board into a loop where the internal test patterns will be displayed in sequence Step 3 After the proper pins are shorted apply power to the AC input The TV will power up by itself and if all is well with the logic X Y buffers and address boards the panel will play the test pattern loop If everything looks normal the possible problem is the main board which is the only thing left not in
39. th however will function identically 12 SMPS Power Suppl GND_5 3V D15V n eNo sa 56 amp 58 Models Ss am 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 13 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 To Logic because of the current requirements for the X and Y Board boards 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 ata 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 boa
40. 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 18 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 a 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 19 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 A10 volts the panel needs to be replaced Do not adjust the Vs voltage more than 15VDC from the value printed on the panel label a SMPS adjustments to eliminate the diffusion problem Logic Board Circuit Explanation To Data Board Address To Y Te Susta Sustain To X
41. ure 1 Access Service Mode 2 Access PDP option submenu 3 Access Pattern Select 4 Use the right arrow key to scroll through the patterns The logic board is suspected to be defective Are the patterns normal The test pattern generated in PDP Option is created in the The main board is logic board thereby suspected to be defective eliminating signal through the LVDS cable en and the Main Board 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 23 PDP Signal Path for Troubleshooting Y Main Board Row f is Driver 1 Logic Board Data Controller Driver Processor Timing Controller Along with the OSD and the test patterns in the FBE2 IC on the Main board there are additional test patterns on the Logic board that can be accessed from the
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