LG 50PJ340 Training Manual Download Page 58

Page: 58 / 133

July 2010 50PJ350 Plasma

Y-Drive Lower

Y-SUS Board

FGnd

P205

P212

SUS P212 Connector Diode Mode Testing

Meter in the Diode Mode

Y-Drive Board should be

disconnected for this test.

SUS_DN (FG)

0.68V

1.47V

2.63V

YB_OC2

0.68V

1.47V

2.63V

YB_OC2

0.55V

1.38V

YT_DATA

0.54V

1.38V

YT_DATA

0.68V

1.47V

2.2V

YTB_OC1

0.68V

1.47V

2.2V

YTB_OC1

0.66V

1.37V

2.8V

YB_STB

0.66V

1.37V

2.8V

YB_STB

0.56V

1.38V

0.86V

YB_CLK

0.54V

1.38V

0.86V

YB_CLK

SUS_DN (FG)

0.56V

1.82V

4.9V

FG5V

0.56V

1.82V

4.9V

FG5V

SUS_DN (FG)

Diode Check

Run

Label

Pin

Red Lead on FG

P212 "Y-SUS" to "Lower "Y-Drive" P205

Summary of Contents for 50PJ340

Page 1: ...Advanced Single Scan Troubleshooting 50 Class HD 720p Plasma TV 50 diagonally Training Manual 50PJ350 Plasma Display 50PJ350 Plasma Display Published July 12th 2010 Updated August 12th 2010 ...

Page 2: ...ircuit Board Operation Troubleshooting and Alignment of Switch Mode Power Supply No VS On command input to SMPS Main Board Preliminary Contact Information Preliminary Matters Specifications Plasma Overview General Troubleshooting Steps Disassembly Instructions Voltage and Signal Distribution OUTLINE OUTLINE No Main Power Switch Vacation Switch Interconnect Diagram 11X17 Foldout Section used as a q...

Page 3: ...money sometimes can be overlooked These techniques will also be presented The next section will get the Technician familiar with the Disassembly Identification and Layout of the Plasma Display Panel At the end of this Section the Technician should be able to Identify the Circuit Boards and have the ability and knowledge necessary to safely remove and replace any Circuit Board or Assembly Overview ...

Page 4: ... Huntsville AL 35813 32LG40 32LH30 37LH55 42LG60 42LG70 42LH20 42LH40 42LH50 42LH90 42SL80 47LG90 47LH85 47LE8500 42PG20 42PQ20 42PQ30 50PG20 50PJ350 50PK750 50PS80 50PS60 60PK750 60PS11 60PS60 60PS80 LCD DV PLASMA Also available on the Plasma Page PDP Panel Alignment Handbook Schematics with Bookmarks Plasma Control Board ROM Update Jig required LG Contact Information LG Contact Information Prese...

Page 5: ...Electronics Unauthorized modifications will not only void the warranty but may lead to property damage or user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for service they must be returned to their original positions and properly fastened CAUTION CAUTION To avoid personal injury disconnect the power before servicing this product If electrical powe...

Page 6: ...ce pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications However there i...

Page 7: ...rged because of residual current stored before Circuit Board removal 4 C MOS circuits are used extensively for processing the Drive Signals and should be protected from static electricity 5 The PDP Module must be carried by two people Always carry vertical NOT horizontal 6 The Plasma television should be transported vertically NOT horizontally 7 Exercise care when making voltage and waveform check...

Page 8: ... examination using your senses the first check should always be the DC Supply Voltages to those circuits under test Always confirm the supplies are not only the proper level but be sure they are noise free If the supplies are missing check the resistance for possible short circuits Isolate To further isolate the failure check for the proper waveforms with the Oscilloscope to make a final determina...

Page 9: ...10 50PJ350 Plasma This section of the manual will discuss the specifications of the 50PJ350 Advanced Single Scan Plasma Display Television 50PJ350 PRODUCT INFORMATION SECTION 50PJ350 PRODUCT INFORMATION SECTION ...

Page 10: ...on 3M 1 Dynamic Contrast Ratio TruSlim Frame Picture Wizard II Easy Picture Calibration Smart Energy Saving Intelligent Sensor Dual XD Engine AV Mode Cinema Sports Game Clear Voice II ISFccc Ready 24P Real Cinema USB 2 0 JPEG MP3 3 HDMI 1 3 Inputs SIMPLINK Connectivity Dolby Digital 5 1 Decoder Infinite Sound For Full Specifications See the Specification Sheet ...

Page 11: ...ver before The 600Hz refresh rate virtually eliminates motion blur 3 000 000 1 Contrast Ratio Stunning detail No more worrying about dark scenes or dull colors The Mega Contrast ratio of 3 000 000 1 delivers more stunning colors and deeper blacks than you can imagine TruSlim Design At less than 1 thick the new TruSlim Frame trims away distraction without compromising screen size USB 2 0 View video...

Page 12: ...N 720P HD Resolution Pixels 1365 H 768 V See and experience more Pictures are sharper Colors are more vibrant Entertainment is more real Everything looks better on an HDTV HDMI 1 3 Deep Color Digital multi connectivity HDMI 1 3 Deep color provides a wider bandwidth 340MHz 10 2Gbps than that of HDMI 1 2 delivering a broader range of colors and also drastically improves the data transmission speed D...

Page 13: ...when background noise swells Save Energy Save Money Home electronic products use energy when they re off to power features like clock displays and remote controls Those that have earned the ENERGY STAR use as much as 60 less energy to perform these functions while providing the same performance at the same price as less efficient models Less energy means you pay less on your energy bill Draws less...

Page 14: ... using 10 sub fields per frame process vs Comp 8 sub field frame No smeared images during fast motion scenes 600Hz Sub Field Driving 600Hz Sub Field Driving Sub Field firing occurs using wall charge and polarity differences between Y SUS and Z SUS signals Original Image 10 Sub Fields Per Frame ...

Page 15: ...15 July 2010 50PJ350 Plasma 50PJ350 Remote Control 50PJ350 Remote Control TOP PORTION BOTTOM PORTION p n AKB72914201 ...

Page 16: ...16 July 2010 50PJ350 Plasma 50PJ350 Rear and Side Input Jacks 50PJ350 Rear and Side Input Jacks USB for Music Photos and Software Upgrades AC In SIDE INPUTS REAR INPUTS HDMI 3 USB Composite Video Audio ...

Page 17: ... mount Model No Serial No Label 20 7 8 530mm 30 13 16 782 32mm 5 1 4 133 6mm 2 3 8 60 96mm 15 3 4 400mm 15 3 4 400mm 78 5 lbs with Stand 60 8 lbs without Stand Weight There must be at least 4 inches of Clearance on all sides 340W Typical 0 1W Stand By Power 7 3 8 187 2mm 2 3 4 70mm 17 July 2010 50PJ350 Plasma 15 3 16 385 8mm ...

Page 18: ...discuss Disassembly Layout and Circuit Board Identification of the 50PJ350 Advanced Single Scan Plasma Display Panel Upon completion of this section the Technician will have a better understanding of the disassembly procedures the layout of the printed circuit boards and be able to identify each board ...

Page 19: ...moving the Back Cover To remove the back cover remove the 32 screws Indicated by the arrows The Stand does not need to be removed PAY CLOSE ATTENTION TO THE TYPE SIZE AND LENGTH Of the screws when replacing the back cover Improper type can damage the front ...

Page 20: ...Circuit Boards Right X Y SUS Z SUS Left X Main Board Power Supply SMPS FPC FPC Panel Voltage and Panel ID Label FPC Invisible Speakers FPC FPC FPC TCP Heat Sink AC In Side Input part of main FPC Y Drive Lower Z SUB FPC FPC Center X Conductive Tape Conductive Tape Y Drive Upper IR LED Board Control Soft Touch Keyboard ...

Page 21: ...ard P203 P212 P205 P204 P110 P201 P202 P203 P101 P102 P103 Y SUS Board Y DRIVE UPPER Board Y DRIVE LOWER Board P122 P101 Speakers Front Left AC In P900 n c P111 P162 p n EBR63549501 p n EAY60968701 p n EBR63040301 Z SUB Board p n EBR63039801 p n EBR63551601 p n EBR63551701 p n EBR64062301 p n EBR64062201 p n EBR64062001 p n EBT60953802 p n EAB60962801 p n EAB60962801 p n EBR65007704 P210 P211 P331...

Page 22: ...ed Remove the Y SUS board When replacing be sure to readjust the Va Vs voltages in accordance with the Panel Label Confirm VSC Vy and Z bias as well Disconnect the following Flexible Ribbon Connectors P101 P103 and or P201 P203 Disconnect P212 by pulling the ribbon cable upward Remove P204 or P110 by lifting up on the locking mechanism and pull the ribbon cable out Do not run the set with these co...

Page 23: ...s and pull out P704 and P801 Remove 1 screw in the decorative plastic piece and remove Remove the 4 screws holding the Main board in place and Remove the board Disconnect the following connectors P12 LVDS P111 Ribbon and P101 P102 P104 Ribbons by lifting up the locking tab Remove the 2 screws holding the Control board in place Lift up the Control board to unseat it from the two metal supports at t...

Page 24: ... the set with this heat sink removed To remove the heat sink lift up to release the tacky Chocolate heat transfer material and slide the heat sink to the left to clear the connector wires on the right side Note There are two large pieces of conductive tape on the right side of the Right X Board that must be removed Also note that there several pieces of Chocolate heat transfer material attached al...

Page 25: ...Circuit Boards Getting to the X Circuit Boards B Warning Never run the TV with the TCP Heat Sink removed D Left D Right E Heat Sink Ground Wire Warning Shorting Hazard Conductive Tape Do not allow to touch energized circuits C With Stand removed C ...

Page 26: ...l TCP connectors Left X P101 108 Center X P201 207 Right X P301 308 Carefully lift the TCP ribbon up and off It may stick be careful not to crack TCP See next page for precautions See below to Remove the Connections on the X Boards Removing Connectors to the TCPs Disconnect connector P122 P231 P232 P121 P212 P211 P331 Are the same Cushion Chocolate TCP Flexible ribbon cable connector Va from the Y...

Page 27: ...eeds to be handled carefully Separate the TCP from the connector as shown TCP Film can be easily damaged Handle with care The TCP has two small tabs on each side which lock the ribbon cable fully into the connector They have to be lifted up slightly to pull the connector out Note TCP is usually stuck down to the Chocolate heat transfer material be Very Careful when lifting up on the TCP ribbon cab...

Page 28: ...ight X Boards or 5 in the Center X Board 9 Total Some screws are shared between boards The Left X Board drives the Right 5 16 of the side of the screen vertical electrodes The Center X Board drives the Center 3 8 of the of the screen vertical electrodes The Right X Board drives the Left 5 16 of the side of the screen vertical electrodes ...

Page 29: ...rive Boards At the end of this Section the technician should understand the operation of each circuit board and how to adjust the controls The technician should be able with confidence to troubleshoot a circuit board failure replace the defective circuit and perform all necessary adjustments CIRCUIT OPERATION TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION CIRCUIT OPERATION TROUBLESHOOTING AND CIRCU...

Page 30: ...l Address Display Panel Horizontal Electrodes Sustain 16V M5V RL_ON M_On STB5V 5V 17V to Main Board Vs Va and M5V to Y SUS SMPS OUTPUT VOLTAGES IN RUN 16V M5V Z Drive Control Signals IR Intelligent Sensor FPCs FPCs 3 3V STBY X Board Center P121 P212 P211 P331 P231 P122 Va P101 P121 P211 Vs Note Va not used by Y SUS only fused and routed to the X Board P2 P101 P111 Note 16V not used by Control LVDS...

Page 31: ...oltage Set Up Vy Vsc Ve Vzb 6 Trade name of LG Electronics 7 Manufactured date Year Month 8 Warning Panel Label Explanation Panel Label Explanation 9 TUV Approval Mark Not Used 10 UL Approval Mark 11 UL Approval No 12 Panel Model Name 13 Max Watt Full White 14 Max Volts 15 Max Amps 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...

Page 32: ... panel 3 A Picture issue is encountered 4 As a general rule of thumb when ever the back is removed Remember the Voltage Label MUST be followed it is specific to the panel s needs All label references are from a specific panel They are not the same for every panel encountered Panel Rear View The Waveform adjustment is only necessary 1 When the Y SUS board is replaced 2 When a Mal Discharge problem ...

Page 33: ...OWER SUPPLY SECTION SWITCH MODE POWER SUPPLY SECTION This Section of the Presentation will cover troubleshooting the Switch Mode Power Supply for the Single Scan Plasma Upon completion of the section the technician will have a better understanding of the operation of the Power Supply Circuit and will be able to locate voltage and test points needed for troubleshooting and alignments SMPS p n EAY60...

Page 34: ...17V Audio B Supply Tuner B Circuits Adjustments There are 2 adjustments located on the Power Supply Board VA and VS The M5V is pre adjusted and fixed All adjustments are made referenced to Chassis Ground Use Full White Raster 100 IRE VA VS VR502 VR901 Switch Mode Power Supply Overview Switch Mode Power Supply Overview 5V Signal Processing Circuits STBY 5V Microprocessor Circuits Z SUS Board VS VS ...

Page 35: ...01 L602 F101 10A 250V F302 2 5A 250V F801 4A 250V ZD803 D805 D601 D601 D307 ZD302 ZD303 D609 ZD301 D303 D305 ZD101 ZD401 D301 D302 D306 D309 D308 D103 VA TP VS TP P812 SC101 T901 T902 T301 SMPS p n EAY60968701 Stand By 1 5V Run 388V Stand By 0 9V Run 388V P813 VR901 VS Adj VR502 VA Adj VS and VA TP ...

Page 36: ...e VS VR901 Power Supply Circuit Layout Power Supply Circuit Layout PFC Circuit To MAIN P813 10Amp 250V P812 To Y SUS 17V Source VA VR502 AC Input SC 101 RL103 RL104 Fuse F801 0 9V Stby 388V Run Main Fuse F101 4Amp 250V Fuse F302 1 5V Stby 388V Run 2 5Amp 250V Bridge Rectifier N C ...

Page 37: ... active and is sent to the Main Board via P813 5 17V at pin 5 6 and 7 The Error Det from the SMPS Board to the Main Board can be measured at pin 8 of P813 2 85V STBY and 4 90V RUN but it is not used The RL ON command also turns on the 17V Audio B which is also sent to the Main Board The 17V Audio supply outputs to the Main board at P813 pins 1 and 2 and used for Audio processing and amplification ...

Page 38: ... Relay On Y SUS Z SUS 16V 16V M5V 5VFG Va X PWB Center X PWB Right Y DRIVE Upper 3 3V_ST M5V M5V Vs Vs Va 7 7 7 8 3 3V 7 7 8 8 4 2 4 Vs Va 9 9 7 7 8 Front IR Board POWER SUPPLY SMPS AC Det If missing set will not turn on 5V 17V Audio IC801 17V 17V Reg 6 5V HDMI EDID And other circuits M_On 5V Floating Gnd 6 Not Used Stand By 5V Reg Error Det 3 3VST Y DRIVE Lower M_On 9 7 8 7 9 9 3 46V 5 14V STBY R...

Page 39: ...01 L602 F101 10A 250V F302 2 5A 250V F801 4A 250V ZD803 D805 D601 D601 D307 ZD302 ZD303 D609 ZD301 D303 D305 ZD101 ZD401 D301 D302 D306 D309 D308 D103 VA TP VS TP P812 SC101 T901 T902 T301 SMPS p n EAY60968701 Stand By 1 5V Run 388V Stand By 0 9V Run 388V P813 VR901 VS Adj VR502 VA Adj VS and VA TP ...

Page 40: ...rrect voltage allow the SMPS to run for several minutes to be sure it will operate under load If this test is successful and all other voltages are generated you can be fairly assured the power supply is OK Note To be 100 sure you would need to read the current handling capabilities of each power supply listed on the silk screen on the SMPS and place each supply voltage under the appropriate load ...

Page 41: ...operational P812 VS pins 1 and 2 VA pins 6 and 7 and M5V pins 9 and 10 Note Placing the two 100 Watt light bulbs from Vs to Ground will assure the power supply will regulate with a load and no other Abnormal conditions may result P301 3 1 7 5 11 9 15 13 17 4 2 8 6 12 10 16 14 18 17V Gnd 5V 5V Gnd Gnd Auto Gnd B 100Ω A M_On AC Det 17V Gnd 5V Error Det Gnd RL ON Note Leave previous installed 100Ω re...

Page 42: ... 8 1 16V 5 17V 0 46V a 5V 5 7 Gnd Gnd Gnd Gnd 3 4 3 17V 17V 0V a 16V 1 2 Diode Mode Run STBY Label Pin P813 Connector SMPS to Main P301 P813 1 Note This connector has two rows of pins Odd on bottom row a Note The 17V 5V AC_Det and Error Det turn on when the RL_On command arrives b Note The M5V Va and Vs turn on when the M_On Monitor On command arrives c Note The Error Det line is not used in this ...

Page 43: ... 3 Open 206V Vs 1 2 Diode Mode Run Label Pin SC101 AC INPUT Standby Run Diode Mode Connector Pin Number SC101 120VAC 120VAC Open L and N Diode Mode Readings taken with all connectors Disconnected DVM in Diode Mode P812 Power Supply to Y SUS P210 Note This voltage will vary in accordance with Panel Label P812 1 Y SUS routes Va to bottom X Left Vs routed to Z SUS from P211 M5V routed through Y SUS t...

Page 44: ... Vertical Electrodes Routed to the Left X Board VS Supplies the Panel s Horizontal Electrodes Also Routed to the Z SUS board M5V Supplies Bias to Y SUS From Y SUS routed to the Control Board then Z SUS VY Sets the Negative excursion of Reset in the Drive Waveform VSC Sets the amplitude of the complex waveform SET UP sets amplitude of the Top Ramp of Reset in the Drive Waveform SET DOWN sets the Pi...

Page 45: ...tributes 16V and M5V Logic signals needed to generate drive waveform VA Receive M5V Va Vs from SMPS Y Drive Boards Receive Scan Waveform Display Panel Power Supply Board SMPS FETs amplify Y Sustain Waveform Left X Board Z SUS Board Distributes 16V M5V Generates Floating Ground 5V 15V by DC DC Converters Logic signals needed to scan the panel Control Board Distributes Vs Distributes Vs Va and M5V D...

Page 46: ...1 3 to Control for Z SUS M5V pins 4 7 Ribbon c P203 VR401 Set Dn P101 FS204 16V 2A 125V VR501 VSC FS203 VS 4A 250V FS201 VA 10A 125V FS202 M5V 10A 125V VR502 Vy VR402 Set Up Vy TP VSC TP P212 Floating Gnd To Y Drive Upper To Y Drive Lower p n EBR63039801 Floating Gnd Scan Signal Floating Gnd Floating Gnd c c P210 c c P211 VS to the Z SUS Logic Signals to Lower Y Drive Board ...

Page 47: ...et 2 08V 1 18V 16 DATA 0V 1 02V 17 SET_ON 2 09V 1 14V 18 OC1 1 43V 1 14V 19 Det_Level_Sel 0 03V 1 14V 20 STB 1 97V 1 14V 21 Slope_Rate_Sel 1 34V 1 14V 22 CLK 0 59V 1 14V 23 YER_DN 0V 1 14V 24 SET_UP 0 24V 1 14V 25 YSUS_DN 0 95V 1 14V 26 Ramp_Slope 1 01V 1 14V 27 YER_UP 0 62V 1 14V 28 Y_Pass_Top 1 08V 1 14V 29 YSUS_UP 0 06V 1 14V 30 Gnd Gnd Gnd P101 Connector Y SUS to Control P111 4 7 Pin Label Run...

Page 48: ... is the Heat Run mode Set screen to White Wash 1 Adjust Vy VR502 to Panel s Label voltage 1V 2 Adjust VSC VR501 to Panel s Label voltage 1V CAUTION Use the actual panel label and not the book for exact voltage settings Vy VSC Voltages Reads Positive Location Bottom Center of board Just above Transformer Location Bottom Left of the board VSC TP Vy TP This is just for example ...

Page 49: ...l from waveforms above observed 100uS div 548V p p NOTE The Waveform Test Points are fragile If by accident the land is torn and the run lifted make sure there are no lines left to right in the screen picture 100uSec 75 to 90 VRMS There are several other test points on either the Upper or Lower Y Drive boards that can be used Basically any output pin on any of the FPC to the panel are OK to use 20...

Page 50: ...n to the Y Drive Waveform Tip Drive Waveform Tip Note this TP VS_DA can be used as an External Trigger for scope when locking onto the Y Drive Scan or the Z Drive signal This signal can also be used to help lock the scope when observing the LVDS video signals ...

Page 51: ...gnal to the right of blanking TIP If you expand to 100uSec per division the adjustment for SET UP can be made using VR402 and the SET DN can be made using VR401 It will make this adjustment easier if you use the Expanded mode of your scope Fig 2 At 200uSec per division the area of the waveform to use for SET UP or SET DN is now becoming clear Now the only two blanking signals are present Set must ...

Page 52: ...ION Lower Center Right of the board SET UP ADJUST 1 Adjust VR402 and set the A portion of the signal to match the waveform above 224V p p 5V SET DN ADJUST 2 Adjust VR401 and set the B time of the signal to match the waveform above 180uSec 5uSec Set must be in WHITE WASH All other DC Voltage adjustments should have already been made VR402 VR401 Lower Y Drive Top Buffer B A ADJUSTMENT LOCATION Top L...

Page 53: ...53 July 2010 50PJ350 Plasma Set Up Adjustment Too High or Low Set Up Adjustment Too High or Low Set Up swing is Minimum 181V Max 266V p p ...

Page 54: ...54 July 2010 50PJ350 Plasma Set Down Adjustment Too High or Low Set Down Adjustment Too High or Low Set Dn swing is Minimum 116uSec Max 205uSec 23V off the Floor Floor Normal 180uSec Too Low 116uSec ...

Page 55: ...ng the Y SUS Board Warning Never run the Y SUS with P212 Y SUS or P204 P110 Y Drives removed unless the Y Drive boards are removed completely Board Failure will occur Y Y SUS Board Troubleshooting VScan SUS Board Troubleshooting VScan P N EBR6303801 TIP Use the Scan Output Screw Lugs to test for V Scan signal if the Y Drive boards are removed Scan Scan ...

Page 56: ...rive Logic and FG5V Drive Logic and FG5V Y Drive Lower Y SUS Board TIP Use Scan Screw Lugs to test for Y Scan signal if the Y Drive boards are removed FG5V 4 9V measured from Pins 15 or 16 To Floating Gnd Use screw just above P212 on the Y SUS P205 P212 TIP Connectors do not come with a new Y SUS or Y Drives FGnd c ...

Page 57: ...he fact they are read from Chassis Gnd but they are actually Floating Ground related DO NOT hook scope Gnd to Floating Gnd TP without an Isolation Transformer Y Drive Lower Y SUS Board c Pins 3 12 are Logic Drive Signals to the Y Drive Upper c FGnd P205 P212 SUS_DN FG 1 SUS_DN FG 2 YB_OC2 3 YB_OC2 4 YT_DATA 5 YT_DATA 6 YTB_OC1 7 YTB_OC1 8 YB_STB 9 YB_STB 10 YB_CLK 11 YB_CLK 12 SUS_DN FG 13 SUS_DN ...

Page 58: ...2 0 68V 1 47V 2 63V YB_OC2 3 0 68V 1 47V 2 63V YB_OC2 4 0 55V 1 38V 0V YT_DATA 5 0 54V 1 38V 0V YT_DATA 6 0 68V 1 47V 2 2V YTB_OC1 7 0 68V 1 47V 2 2V YTB_OC1 8 0 66V 1 37V 2 8V YB_STB 9 0 66V 1 37V 2 8V YB_STB 10 0 56V 1 38V 0 86V YB_CLK 11 0 54V 1 38V 0 86V YB_CLK 12 FG FG FG SUS_DN FG 13 FG FG FG SUS_DN FG 14 0 56V 1 82V 4 9V FG5V 15 0 56V 1 82V 4 9V FG5V 16 FG FG FG SUS_DN FG 17 Diode Check Dio...

Page 59: ...crews on the far left hand side of the Y SUS Location FG 5V Regulator IC509 FG 15V Regulator IC508 D513 FG 15 24V FG5V Floating Ground 5V Checked at IC509 Bottom Leg FG15V Floating Ground 15V Checked at IC508 Bottom Leg P118 TIP These components are on the back of the board To Test these voltages remove the board completely supply Ground and any 5V supply to M5V fuse FS202 D511 FG 19 86V D512 FG 9...

Page 60: ...tage Measurements for the Y SUS Board Y Y SUS 16V Generation Checks SUS 16V Generation Checks 16V Test Point Used in the Y SUS for Waveform Creation and Leaves the Y SUS board on P101 pins 1 3 to the Control Board Checked at Cathode Side D515 Run 16V Standby 0V Diode Check 1 32V Location ...

Page 61: ... 16V Pins 1 through 3 Locations P101 M5V Pins 4 through 7 FS201 M5V 10V 125V Diode Check 1 19V With Board Disconnected 0 97V with board connected Diode Check Open With Board Disconnected or Connected FS204 16V 2A 125V FS204 Protects 16V Creation D501 and IC501 Diode Check 1 61V With Board Disconnected or 1 59V Connected ...

Page 62: ... SUS P113 and P114 Plug Information Note These voltages will vary in accordance with Panel Label c P210 c P203 Open 60V Va 5 7 Open n c n c 4 Gnd Gnd Gnd 1 3 Diode Check Run Label Pin P203 Y SUS to X Drive Left P122 1 19V 5 1V M5V 9 10 Gnd Gnd Gnd 8 Open 60V Va 6 7 Gnd Gnd Gnd 4 5 n c n c n c 3 Open 195V Vs 1 2 Diode Check Run Label Pin P210 Connector Y SUS to Power Supply P812 ...

Page 63: ...tors Disconnected DVM in Diode Mode Y Y SUS P211 Plug Information SUS P211 Plug Information Note These voltages will vary in accordance with Panel Label c P211 Open 98V 102V ER_PASS 7 11 n c n c n c 6 Open 206V Vs 4 5 n c n c n c 3 Gnd Gnd Gnd 1 2 Diode Check Run Label Pin P211 Connector Y SUS to Z SUS P2 ...

Page 64: ... 28 Gnd Gnd Gnd 13 1 14V 0 62V YER_UP 27 Gnd Gnd Gnd 12 1 14V 1 01V Ramp_Slope 26 1 75V 0V OE 11 1 14V 0 95V YSUS_DN_IN 25 Gnd Gnd Gnd 10 1 14V 0 24V SET_UP 24 1 54V 0V CTRL_OE 9 1 14V 0V YER_DN 23 Gnd Gnd Gnd 8 1 14V 0 59V CLK 22 1 19V 4 9V 5V 7 1 14V 1 34V Slope_Rate_Sel 21 1 19V 4 9V 5V 6 1 14V 1 97V STB 20 1 19V 4 9V 5V 5 1 14V 0 03V Det_Level_Sel 19 1 19V 4 9V 5V 4 1 14V 1 43V OC1 18 1 61V 16...

Page 65: ...ed on the Y SUS board then selects the horizontal electrodes sequentially starting at the top and scanning down the panel Scanning is synchronized by receiving Logic scan signals from the Control board The 50PJ350 uses 8 Driver ICs on 2 Y Drive Boards commonly called Y Drive Buffers but are actually Gate Arrays Y Y Drive Explained Drive Explained Y Y DRIVE BOARD SECTION DRIVE BOARD SECTION Y DRIVE...

Page 66: ...re removed the Y SUS board will fail Floating Ground is delivered to each of the Y Drive boards by 2 screw lugs Scan is delivered to each of the Y Drive boards by 1 screw lugs Each of the Y Drive boards operate from Floating Ground no reference to Chassis Gnd Floating Gnd 5V can be measured across C105 Upper or C205 Lower Y Y Drive Board Layout Drive Board Layout Y DRIVE UPPER TOP Y DRIVE LOWER BO...

Page 67: ...per Layout Y SUS SIDE PANEL SIDE p n EBR63551601 P110 Floating Ground Standoff The Floating Ground Standoff delivers FG To the Y Drive Boards There are 2 per board Connector P110 does not come with a new Y SUS or Y Drive Warning Never run the Y SUS with P110 disconnected You must remove the Y Drive board completely due to these FG lugs VScan The VScan Standoff delivers the VScan signal to the Y Dr...

Page 68: ...ive Lower Layout Y SUS SIDE PANEL SIDE p n EBR63551701 P204 Floating Ground Standoff The Floating Ground Standoff delivers FG To the Y Drive Boards There are 2 per board Connector P205 or P204 does not come with a new Y SUS or Y Drive Warning Never run the Y SUS with P205 or P204 disconnected You must remove the Y Drive boards completely due to these FG lugs VScan The VScan Standoff delivers the V...

Page 69: ...h Red Lead on Scan 0 7844V with Black Lead on Scan Diode Mode Reading from Floating Ground Floating Gnd Floating Gnd Scan Signal Scan Signal Floating Gnd Floating Gnd FL201 FG5V Fuse FG5V TP Open with Red Lead on Scan 0 41V with Black Lead on Scan Any Output Buffer TP Open with Red Lead on Scan 0 79V with Black Lead on Scan Any Connector to the Panel Buffer Output TP ...

Page 70: ...NG THIS PROCEDU YOU CAN CHECK FOR A SHORTED BUFFER ICs OUTPUT USING THIS PROCEDURE RE Any of these output lugs can be tested Look for shorts indicating a defective Buffer IC Indicated by white outline 6 Ribbon cables communicating with the Panel s Horizontal Electrodes totaling 768 lines determining the Panel s Vertical resolution pixel count BACK SIDE FRONT SIDE BUFFER IC FGnd BACK SIDE BLACK LEA...

Page 71: ...rom Floating Ground FG FG FG SUS_DN FG 24 30 0 41V 2 8V 4 97V FG5V 21 23 FG FG FG SUS_DN FG 17 20 0 52V Open 0V YT_DATA 16 0 52V Open 0 8V YT_CLK 15 0 52V Open 2 6V YT_LE STB 14 0 55V Open 2 2V YT_OC1 13 0 53V Open 2 4V YT_OCR 12 Open Open 0V YSUS_DATA 11 FG FG FG SUS_DN FG 1 10 Diode Check Diode Check Run Label Pin Red Lead on FG Black Lead on FG P110 Upper Y Drive Diode Mode Readings taken with ...

Page 72: ...from Floating Ground FG FG FG SUS_DN FG 21 30 Open Open 0V YSUS_DATA 20 0 53V Open 2 4V YT_OCR 19 0 55V Open 2 2V YT_OC1 18 0 52V Open 2 6V YT_LE STB 17 0 52V Open 0 8V YT_CLK 16 0 52V Open 0V YT_DATA 15 FG FG FG SUS_DN FG 11 14 0 41V Open 4 97V FG5V 8 10 FG FG FG SUS_DN FG 1 7 Diode Check Diode Check Run Label Pin Red Lead on FG Black Lead on FG P204 Lower Y Drive Diode Mode Readings taken with a...

Page 73: ...able carefully slide it back into the slot see Fig 3 be sure the Tab is seated securely and press the Locking Tab back to the locked position see Fig 2 then Fig 1 Removing Panel Flexible Ribbon Cables from Y Removing Panel Flexible Ribbon Cables from Y Drive Upper or Lower Drive Upper or Lower Flexible Ribbon Cables shown are from a different model but pro Flexible Ribbon Cables shown are from a d...

Page 74: ...he Locking Tab will offer a greater resistance to closing in the case Note the cable is crooked In this case the Tab on the Ribbon cable was improperly seated at the top This can cause bars lines intermittent lines abnormalities in the picture Remove the ribbon cable and re seat it correctly Incorrectly Seated Y Incorrectly Seated Y Drive Flexible Ribbon Cables Drive Flexible Ribbon Cables ...

Page 75: ...ard Developed on Z SUS Z Bias This Section of the Presentation will cover troubleshooting the Z SUS Board Assembly Upon completion of this section the Technician will have a better understanding of the circuit and be able to locate voltage and diode mode test points needed for troubleshooting and all alignments Note The Z SUS can not be run Stand Alone in the 50T1 Panel Models Z Z SUS SECTION SUS ...

Page 76: ...rcuits generate erase sustain waveforms Generates Z Bias 100V Receives Logic Signals M5V and VS PDP Display Panel Via 3 FPC Flexible Printed Circuits Control Board Y SUS Board NO IPMs Power Supply Board 16V 16V Z SUS board receives VS and M5V SMPS and 17V from the Control board VS M5V M5V Z SUB FET Makes Drive waveform ...

Page 77: ... SUS Error Com to the Y SUS M5V from SMPS to the Y SUS generates 16V M5V and 16V are routed through the Control board Logic Signals generated on the Control board Z SUS Waveform Test Point J36 P3 To Z SUB No IPMs FS1 VS 6 3A 250V Z Bias VR201 Z Bias TPs Z SUS Waveform Development FETs P N EBR63040301 P102 No IPMs No IPMs P12 from Control ...

Page 78: ...50PJ350 Z SUS Layout Drawing 50PJ350 Z SUS Layout Drawing 78 July 2010 50PJ350 Plasma Z Bias Waveform J36 VZB TP VR201 VZB P1 FS1 VS D312 D309 Z SUS BOARD p n EBR63040301 P5 P4 P3 P2 4A 250V ...

Page 79: ... P7 and then to one FPC Flexible Printed Circuit connections P202 Oscilloscope Connection Point J36 to check Z Output waveform Right Hand Side Center Z Z SUS Waveform SUS Waveform This Waveform is just for reference to observe the effects of Zbz adjustment Vzb voltage 95V 1V Z Drive Waveform Vzb Z Bias VR201 manipulates the offset of this waveform segment TIP The Z Bias VZB Adjustment is a DC leve...

Page 80: ...djusting VR201 Set should run for 15 minutes this is the Heat Run mode Set screen to White Wash mode or 100 IRE White input All SMPS adjustments should have been completed 1 Place DC Volt meter between VZB TPs 2 Adjust VZB Z Bias VR201 in accordance with your Panel s voltage label VZB Z Bias Bottom Left of Z SUS Board VZB Z Bias VR201 VZB Z Bias TP ...

Page 81: ... and Diode Checks SUS P211 Voltages and Diode Checks Voltage and Diode Mode Measurements Pin 1 P2 Location Top Left There are no Stand By voltages on this connector Open 98V 102V ER_COM 7 11 n c n c n c 6 Open 206V Vs 4 5 n c n c n c 3 Gnd Gnd Gnd 1 2 Diode Check Run Label Pin P2 Z SUS to Y SUS P211 Note This voltage will vary in accordance with Panel Label ...

Page 82: ...tages and Diode Checks Voltage and Diode Mode Measurements P1 Location Bottom Left hand side Pin 1 There are no Stand By voltages on this connector Gnd Gnd Gnd 12 Open 0 17V ZSUS_UP 11 Open 0 77V ZSUS_DN 10 Open 0 14V Z_ER 9 Open Gnd SLOP_CONTROL 8 Open 1 83V ZBIAS 7 3 09V 0 058V Y_OE 6 Gnd Gnd Gnd 5 1 52V 4 9V 5V 3 4 Open 16V 15V 1 2 Diode Check Run Label Pin P1 Z SUS Board to Control P101 ...

Page 83: ... TCPs This Section of the Presentation will cover troubleshooting the Control Board Assembly Upon completion of this section the Technician will have a better understanding of the circuit and be able to locate voltage and diode mode test points needed for troubleshooting Main Board Supplied Panel Control and LVDS Video Signals Operating Voltages Control Board Generated Y SUS and Z SUS Drive Signal...

Page 84: ... 2010 50PJ350 Plasma Control Board Pictorial Control Board Pictorial p n EBR63549501 Pattern Generator For Panel Test n c For ROM Updates P101 P111 P161 P162 D201 Should be blinking IC231 IC211 IC801 P121 P102 ...

Page 85: ...t Control Board To Test Control Board Disconnect all connectors Jump STBY 5V from SMPS P813 Pin 13 to pin 3 bottom leg of IC231 Apply AC and turn on the Set Observe Control board LED D201 if it s on most likely Control board is OK 3 3V and X Drive Center and Right RGB Signals Z Drive Creation Signals M5V and 16V to Z SUS Note IC231 3 3V Regulator routed to all X Boards 1 3 16V Ribbon Cable Y SUS a...

Page 86: ...ON BACK SIDE OF THE BOARD Chocolate Heat Transfer Material 03 Gnd 02 Gnd 01 3 3V 04 3 3V 05 Gnd 06 3 3V IC121 Pin 1 Be sure the Chocolate Heat Transfer Material remains in place if the board is removed Note The temperature circuit not only protects the panel from overheating but it also is responsible for manipulating the Y Drive waveform as the panel changes temperature ...

Page 87: ...Drive or Z Drive or Z Drive Waveform Tip Drive Waveform Tip Note this TP VS_DA can be used as an External Trigger for scope when locking onto the Y Drive Scan or the Z Drive signal This signal can also be used to help lock the scope when observing the LVDS video signals ...

Page 88: ...of the sine wave is 25 MHZ Missing this clock signal will halt operation of the panel drive signals Checking the Crystal X101 Checking the Crystal X101 Clock Clock on the Control Board on the Control Board CONTROL BOARD CRYSTAL LOCATION X101 Osc Check 25Mhz Left Leg Osc Check 25Mhz Right Leg ...

Page 89: ... be a Control Board problem MCM 16 bit words Resistor Array 256 Lines output Total Basic Diagram of Control Board Control Board to X Board Address Signal Flow IC201 Control Board Signal Simplified Block Diagram Control Board Signal Simplified Block Diagram MCM IC201 2 Buffer Outputs per TCP CONTROL BOARD X DRIVE BOARD PANEL 128 Lines per Buffer EEPROM There are 16 total TCPs 4096 Vertical Electrod...

Page 90: ...delivering Y SUS Waveform development and Y Drive logic signals to the Y SUS Board Y Drive logic signals are simply routed right through the Y SUS to the Y Drive boards Pin c P111 Label Silk Screen Note The 16V is not used by the Control board it is routed to the Z SUS leaving on P101 Pins 1 2 The M5V also leaves on P101 Pins 3 4 Pins 1 through 3 Receive 16V from the Y SUS Protected on Y SUS by FS...

Page 91: ... 0V OE 11 2 98V 0V CTRL_OE 9 1 52V 4 9V 5V 7 1 52V 4 9V 5V 5 Open 16V 15V 3 Open 16V 15V 1 Diode Check Run Label Pin P111 Control Odd Pins to P101 Y SUS Gnd Gnd Gnd 30 2 82V 1 08V I_Pass_Top 28 2 82V 1 01V I_Ramp_Slope_Opt1 26 2 82V 0 24V I_SET_UP 24 2 82V 0 59V I_CLK 22 2 84V 1 97V I_STB 20 2 84V 1 43V I_OC1 18 2 84V 0V I_DATA 16 2 84V 1 78V I_OC2 14 Gnd Gnd Gnd 12 Gnd Gnd Gnd 10 Gnd Gnd Gnd 8 1 ...

Page 92: ... Color Bar input Loss of these Signals would confirm the failure is on the Main Board or the LVDS Cable itself Example of Normal Signals measured at 1V p p at 10µSec Example of LVDS Video Signal LVDS Cable P121 on Control board shown Press two outside tabs inward to release Control Board LVDS P121 Signals Control Board LVDS P121 Signals Pins are close together Pins 2 5 7 8 11 12 15 16 24 25 are LV...

Page 93: ...3 Main P121 Connector Control Board to Main P703 Note There are no voltages in Stand By mode Blue Pins indicate 12 bit differential video signal 1 1 Gnd Gnd Gnd 31 Open n c n c 30 Open 3 3V Module_SCL1 29 Open 3 3V Module_SDA1 28 Open 2 87V DISP_EN 27 Gnd Gnd Gnd 26 1 36V 1 25V RE2 25 1 36V 1 23V RE2 24 3 09V 3 3V PC_SER_DATA 23 3 08V 0 59V PC_SER_CLK 22 Open n c n c 21 Open n c n c 20 Gnd Gnd Gnd...

Page 94: ... mode Diode Mode Readings taken with all connectors Disconnected Black lead on Gnd DVM in Diode Mode 1 1 P101 Label P101 Label 16V 16V 5V 5V Gnd Gnd Gnd 12 Open 0 17V ZSUS_UP 11 Open 0 77V ZSUS_DN 10 Open 0 14V Z_ER 9 Open Gnd SLOP_CONTROL 8 Open 1 83V ZBIAS 7 3 09V 0 058V Y_OE 6 Gnd Gnd Gnd 5 1 52V 4 9V 5V 4 1 52V 4 9V 5V 3 Open 16V 15V 2 Open 16V 15V 1 Diode Check Run Label Pin P101 Connector Co...

Page 95: ...11 0 97V 1 0V 9 0 97V 1 27V 8 0 97V 1 0V 7 0 97V 1 27V 6 0 97V 1 0V 3 0 97V 1 27V 2 Diode Mode Run Pin P161 Connector to the Center X Board P231 1 1 0 97V 1 0V 52 0 97V 1 27V 53 1 2V 1 87V 54 1 2V 1 87V 56 1 2V 3 22V 57 1 1V 0 49V 58 0 97V 1 27V 51 0 97V 1 27V 49 0 97V 1 0V 50 0 97V 1 27V 46 0 97V 1 0V 47 0 97V 1 27V 44 0 97V 1 0V 45 1 1V 0 49V 59 0 97V 1 0V 43 0 97V 1 27V 42 0 97V 1 0V 40 0 97V 1...

Page 96: ...V 15 0 97V 1 0V 17 0 97V 1 0V 25 0 97V 1 27V 27 0 97V 1 0V 28 0 97V 1 27V 24 0 97V 1 0V 23 0 97V 1 27V 22 0 97V 1 0V 20 0 97V 1 27V 19 0 97V 1 0V 18 Diode Mode Run Pin 0 97V 1 27V 29 0 97V 1 0V 30 0 97V 1 27V 32 0 97V 1 0V 33 0 97V 1 27V 37 0 97V 1 0V 38 0 97V 1 27V 40 0 97V 1 0V 41 0 97V 1 27V 42 0 97V 1 0V 36 0 97V 1 27V 35 Diode Mode Run Pin 0 97V 1 0V 51 0 97V 1 27V 52 0 97V 1 0V 43 0 97V 1 27...

Page 97: ... boards have no adjustment X BOARD OPERATIONAL VOLTAGE VA Originally developed on the Switched Mode Power Supply VA Voltage for Address is routed through the Y SUS board out on P203 pins 5 7 and then to the Left X board via P122 pins 5 7 Va leaves P121 pins 1 5 and is sent to the Center X Board via P212 pins 48 50 It then leaves on P211 pins 1 5 and goes to the Right X P331 pins 48 50 3 3V Control...

Page 98: ... the Taped Carrier Packages TCPs Va is introduced to the Left X board first then the Left X sends Va to the Center X and then the Center X sends Va to the Right X They route the Logic Color signals from the Control board to all of the Taped Carrier Packages TCPs The X boards have connectors to 16 TCPs 5 on the left and right The Center X board has connections to 6 TCPs There are a total of 16 TCPs...

Page 99: ...s TCPs have one heat sink one heat sink indicated by the arrow indicated by the arrow It protects all 16 TCPs It protects all 16 TCPs NEVER run the television with this heat sink removed NEVER run the television with this heat sink removed Damage to the TCPs will occur and cause a defective panel Damage to the TCPs will occur and cause a defective panel ...

Page 100: ...the TCPs as shown below On any Va 0 55V TCPs connected On any Va 0 6V TCPs disconnected On 3 3V 0 6V TCPs connected On 3 3V 1 09V TCPs disconnected On Gnd On the below On Gnd On the below On any Va Open TCPs connected On any Va Open TCPs disconnected On 3 3V 1 9V TCPs connected On 3 3V 2 5V TCPs connected Gnd VA source disconnected from Left X board 3 3V Pins 32 33 VA Pins 44 47 VA Pins 4 7 ...

Page 101: ...Control Board Back side of TCP Ribbon TCP Taped Carrier Package Flexible Cable Y SUS Board Va Logic Connector X Drive Board Long Black Heat Sink 128 lines 128 lines 256 total lines This shows the layout of the bottom ribbon cables connecting to the Panel s Vertical electrodes Address Bus Note that each ribbon cable has a solid state device called a TCP attached 256 Vertical Electrodes Chocolate 3 ...

Page 102: ...d TCP Connector Distribution Any X Board to Any TCP P101 P105 or P201 P206 or P301 P305 Va P122 5 7 from Y SUS Va Routes to 3 3V Origination From Control board IC231 center leg Arrives on X board Cent P232 Pins 1 5 Leaves Center X P212 pins 40 41 To Left X P121 pins 10 11 Leaves Center X P211 pins 10 11 To Right X P331 pins 40 41 Flexible Printed Ribbon Cable to TCP IC On Va Open On 3 3V 2 8V On E...

Page 103: ...the Control board see Control board section 3 3V for TCPs IC53 on Control Board All Connectors to All TCPs look very similar for the 3 3V test point The trace at pins 32 and 33 of each connector There is a small feed trough and a Cap you can use for Test Points Example here from P204 You can only check for continuity back to IC231 you can not run the set with heat sink removed With all connectors ...

Page 104: ... colored noise c Cause the entire area driven by the TCP to be All White or ALL BLACK d Cause a Single Pixel Width Line defect The line can be Red Green or Blue e A dirty contact at the connector can cause b c and d also Warning DO NOT attempt to run the set with the Heat Sink over the TCPs removed After a very short time these ICs will begin to self destruct due to overheating TCP Tapped Carrier ...

Page 105: ... from Y SUS P203 Information SUS P203 Information Note This voltage will vary in accordance with Panel Label There are no Stand By voltages on this connector Voltage and Diode Mode Measurement No Stand By Voltages 1 1 With Heat Sink Open 60V VA 7 Open 60V VA 6 Open 60V VA 5 n a n a n c 4 Gnd Gnd Gnd 3 Gnd Gnd Gnd 2 Gnd Gnd Gnd 1 Diode Check Run Label Pin P122 X Drive Left to Y SUS P203 ...

Page 106: ...or removed TCPs connected On Va Open all connectors removed TCPs disconnected On Chassis Gnd On Chassis Gnd On Va 0 55 Y SUS connector removed TCPs connected On Va 0 6V all connectors removed TCPs disconnected P121 Left X P212 Center X P331 Right X P211 Center X Va 1 5 3 3V 11 12 1 1 1 1 Va 48 50 3 3V 41 42 Va 1 5 3 3V 11 12 1 1 1 1 Va 48 50 3 3V 41 42 Out In In Out ...

Page 107: ...in board This board is also where the television s software upgrades are accomplished through the USB input This board has no mechanical adjustments The Main Board Receives its operational voltage from the SMPS STBY 5V 5V for Video processing 16V for Audio DURING STAND BY From SMPS DURING RUN From SMPS STBY 5V remains Distributes the Turn On Commands to the SMPS Distributes LVDS video to the Contr...

Page 108: ...dentification IC1 IC1 Microprocessor Video Processor P301 P301 to to SMPS SMPS P703 P703 LVDS LVDS P801 P801 Audio Audio HDMI HDMI RS232 RS232 PC PC Remote Remote Rear Rear Inputs Inputs RF RF In In USB USB HDMI HDMI PC PC Audio Audio Optical Optical Audio Audio P704 P704 to Ft IR to Ft IR ...

Page 109: ... P801 All Pins 12 3V MAIN BOARD p n EBT60953802 P703 P301 IC402 X402 IC1 Mstar Micro Video C2 C1 A X1 D1 D2 A2 A1 C C IC202 IC401 Tuner IC308 X401 E B C E B C Q402 Q401 E B C E B C Q403 Q404 31 875Mhz 25Mhz IC801 To SMPS To Ft IR To SPK L313 C A2 A1 D504 D501 12Mhz L803 L804 D505 C A2 A1 C A2 A1 IC201 ...

Page 110: ...4 B Routing 6 3 3V Pin Digital D1 Reset Pin to IC504 7 Gnd B 1 18V Pin Speed Up A1 0V 8 3 3V E 1 18V A1 Gnd A 4 54V C Gnd A 0V A2 5 0V IC308 1 3V_VDDC A2 Gnd Pin Regulator Q403 Tuner SIF D505 B Routing 1 Do not measure Pin Buffer Digital D2 LED R Pin to IC503 2 Gnd B 1 32V Pin Routing A1 0V 3 5 04V E 1 99V A1 0V A 4 54V 4 6 07V C Gnd C 0 13V A2 5 0V 5 4 99V A2 0 28V 6 1 28V Q404 IF_N Buffer 7 1 28...

Page 111: ...July 2010 50PJ350 Plasma MAIN BOARD p n EBT60953802 1 2 3 1 2 3 E B C IC504 IC306 IC307 Q504 IC701 IC501 IC304 1 2 3 S G D Q303 E B C Q304 IC203 1 2 3 IC301 IC602 Q702 E B C E B C Q503 IC503 IC502 E B C Q501 IC703 1 2 3 IC303 D502 C A2 A1 E B C Q301 2 1 3 IC302 S G D Q302 ...

Page 112: ...C 3 1V 10 Gnd 1 3 3V 11 n c IC306 3 3V_TU IC502 IC503 IC504 2 5 45V Q303 3 3V_PVSB Sw 12 n c Pin Regulator EDID Data 3 0V Pin Dig Ch Only 13 n c 1 Gnd Pin For HDMI 4 0V G 0V 14 n c 2 3 3V Out 1 Gnd 5 5 37V S 3 3V 15 0V 3 4 97V In 2 Gnd 6 5 4V D 3 3V 16 0V 3 Gnd 7 5 4V IC307 1 8V_TU 4 Gnd 8 0V Q304 Driver for 3 3V_PVSB IC301 1 8V_MST Pin Regulator 5 4 52V 9 3 3V Pin Switch Q303 Pin Regulator 1 Gnd ...

Page 113: ... Explained Main Board Tuner Explained Front bottom right hand side The Tuner in this set is discreet components Silicon Tuner and no longer a self contained unit can Back Side bottom left hand side Check for Tuner B 3 3V on IC306 and 1 8V on IC307 ...

Page 114: ...rystal X1 X402 and X401 Check X1 12Mhz X402 Runs only during On Overtone Crystal X1 Runs all the time Micro Halt Crystal X402 25MHZ X1 X1 X402 1 49V 1 58V 1 48V 1 6V 0 66V 0 54V X401 31 875MHZ X401 Right Side 1V p p Left Side 0 7V p p Right Side 3 50V p p Left Side 2 6V p p Bottom Side 4 2V p p Top Side 2 8V p p ...

Page 115: ...ut of the plug Then rock the connector out of the plug 2 Pull the Cable from the Connector 2 Pull the Cable from the Connector by rocking back and forth by rocking back and forth If the Connector Locks have been If the Connector Locks have been damaged and will not release use a thin damaged and will not release use a thin object and slide straight down as object and slide straight down as indicat...

Page 116: ...1 1 MAIN Board Main Board P703 Location Waveforms Taken from P703 pins 11 and 12 but there are actually 10 pins carrying video Input Signal SMPT Color Bar 10mV per div Pin 11 2uSec per div Pin 12 2uSec per div Pin 11 10uSec per div Pin 12 10uSec per div Pin 1 front row right side Note There are no wires into pins 1 and 2 ...

Page 117: ...K 23 0 76V 1 35V RA2 21 0 77V 1 27V RB2 19 0 77V 1 22V RC2 17 0 77V 1 23V RCLK2 15 0 77V 1 26V RD2 13 0 77V 1 25V RE2 11 2 6V 3 3V Module_SCL1 9 Gnd Gnd Gnd 7 Gnd Gnd Gnd 5 2 6V 3 29V ROM_RX 3 Open n c n c 1 Diode Check Run Label Pin Gnd Gnd Gnd 26 1 49V 3 3V PC_SER_DATA 24 0 77V 1 13V RA2 22 0 77V 1 21V RB2 20 0 77V 1 26V RC2 18 0 77V 1 23V RCLK2 16 1 09V 1 21V RD2 14 1 09V 1 23V RE2 12 2 6V 3 3V...

Page 118: ... Connector Main Board to P100 Front Keys Stand By 3 3V 7 8 Intelligent Sensor 1 1 Open 0V 0V LED_BLUE 12 0 50V 3 31V 0V 3 3V_MST 11 0 85V 3 29V 3 3V 3 3VST 10 Gnd Gnd Gnd Gnd 9 2 64V 3 27V 0 25V EYE_SDA 8 2 64V 3 27V 0V EYE_SCL 7 Gnd Gnd Gnd Gnd 6 Open 0 21V 2 7V LED_RED 5 1 53V 3 29V 3 3V Key_CTL_1 4 1 53V 3 29V 3 3V Key_CTL_0 3 Gnd Gnd Gnd Gnd 2 3 12V 3 76V 3 3V IR 1 Diode Check Run STBY Label P...

Page 119: ... turns on M5V Va and Vs c Note The Error Det line is not used in this model d Note If the AC Det line is Missing the TV will turn off in 10 Seconds e Note Pin 18 is grounded on the Main If opened the power supply turns on automatically Front pins are odd Back pins are even Gnd Gnd Gnd e Auto_Gnd 18 Open 3 29V 0V b M_ON 17 3 1V 4 44V 0V ad AC Det 16 2 62V 2 43V 0V a RL_ON 15 1 07V 5 14V 3 46V STBY_...

Page 120: ...Main Board Speaker Plug P801 Voltage and Diode Check P801 Speaker Connector Diode Mode Check with the Board Disconnected DVM in the Diode mode L L R R Label Open 8 51V 0V 4 Open 8 51V 0V 3 Open 8 51V 0V 2 Open 8 51V 0V 1 Diode Mode Run SBY Pin Main Board Location P8010 Connector Main to Speakers Right Right Left Left 1 1 IC801Audio IC801Audio Amp Amp ...

Page 121: ...ED Driver and Intelligent Sensor IC communicate with the Main Board Microprocessor IC1 via Clock and Data lines These boards have no adjustments The Front Control Board IR and Intelligent Sensor receives its operational B from the Main Board 3 3V_ST from the Main Board This voltage is generated on the Main Board IC302 3 3V_MST generated on the Main Board IC303 The Front Power LEDs are driven by 2 ...

Page 122: ...e locking g mechanism Slide the board out to the left to release the ribbon mechanism Slide the board out to the left to release the ribbon cable cable To facilitate reinstallation slide the board to the right To facilitate reinstallation slide the board to the right just enough to place a slight bow in the ribbon cable just enough to place a slight bow in the ribbon cable then using a small objec...

Page 123: ... Board Stand By 3 3V 7 8 Front LEDs and Intelligent Sensor For the Soft Touch Key Pad section For Readings when any Key is touched see Soft Key Pad Section For Key 1 and Key 2 Open 0V 0V LED_BLUE 12 2 85V 3 31V 0V 3 3V_MST 11 2 28V 3 29V 3 3V 3 3VST 10 Gnd Gnd Gnd Gnd 9 2 54V 3 27V 0 25V EYE_SDA 8 2 53V 3 27V 0V EYE_SCL 7 Gnd Gnd Gnd Gnd 6 3 13V 0 21V 2 7V LED_RED 5 2 58V 3 29V 3 3V Key_CTL_1 4 2 ...

Page 124: ...n entification P101 CONNECTOR Ft IR Board to Ft Key Pad Diode Mode Readings taken with all connectors Disconnected Black lead on Gnd DVM in Diode Mode Measuring Voltage on Pin 1 with DVM turns the TV on If TV is on Input Menu pops up Voltage Measured with a Scope 2 4V 0 16 0 07 8 2 4V 0 16 0 07 7 2 4V 0 16 0 07 6 2 4V 0 16 0 07 5 2 4V 0 16 0 07 4 2 4V 0 16 0 07 3 2 4V 0 16 0 07 2 2 4V 0 16 0 07 1 ...

Page 125: ...ss decoder IC to change the key press data into R2 Ladder Resistive data which the Microprocessor can understand This IC is on the Front IR board IC100 which receives key press data from P101 The output from this IC simply selects the appropriate resistor to inject into the Key 1 or Key 2 line which is then interpreted by the Microprocessor in the Main board IC1 IC100 P101 static sensitive key pre...

Page 126: ...sma Soft Touch Key Pad Soft Touch Key Pad The Soft Touch Key Pad is a thin Static sensitive pad that is adhered to the inside of the front protective shield Soft Touch Key Pad Plastic Frame Lifted up slightly P101 Ribbon Cable ...

Page 127: ... Soft Touch Key pressed P100 Connector IR LED Control Board to P703 Main No Key Pressed KEY 2 KEY 1 Label 3 3V 3 3V STBY 1 58V 3 29V 4 2 58V 3 29V 3 Diode Mode Run Pin Diode Mode Readings taken with all connectors Disconnected Black lead on Gnd DVM in Diode Mode Menu Enter Volume Volume KEY 1 667V 2 42V 0 214V 0 89V Pin 4 measured from Gnd 0 88V 1 619V 2 1V Pin 3 measured from Gnd Input CH Dn CH U...

Page 128: ...ontains the Invisible Speaker system The Full Range Speakers point downward so there are no front viewable speaker grills or air ports Invisible Speaker System Overview Full Range Speakers Reading across speaker wires 8 2 ohm p n EAB60962801 Top View Cone View Installed View Remove two screws from the bottom ...

Page 129: ...CTION This section shows the Interconnect Diagram called the 11X17 foldout that s available in the Paper and Adobe version of the Training Manual Use the Adobe version to zoom in for easier reading When Printing the Interconnect diagram print from the Adobe version and print onto 11X17 size paper for best results ...

Page 130: ...2 A1 C A2 A1 D504 D501 12Mhz L803 L804 D505 E B C IC504 IC306 IC307 Q504 IC701 IC501 IC304 1 2 3 Q303 E B C Q304 IC203 1 2 3 IC301 IC602 Q702 E B C Q503 IC503 IC502 E B C Q501 IC703 1 2 3 IC303 D502 C A2 A1 E B C Q301 2 1 3 IC302 STBY Regulator S G D Q302 E B C 1 2 3 1 2 3 C A2 A1 Test FG5V across C105 C105 P1 P2 S G D P3 P7 FG5V FL201 IC510 250V 220uf 250V 220uf 250V 220uf 250V 220uf 250V 220uf S...

Page 131: ...d C 0V C 0V 3 n c 3 5 04V In 3 3 3V 3 3 3V Enable E Gnd E Gnd 4 n c 4 Gnd 4 0V 5 n c IC304 1 2V_DVDD Reg 5 3 3V 5 0V Q302 5V_MST D502 HDMI CEC Limiter 6 n c Pin Dig Ch Only 6 3 3V 6 4 97V Out Pin Switch Pin 7 0V 1 Gnd 7 3 3V G 0V A1 0V 8 3 3V 2 1 2V Out 8 3 3V IC703 RS232 Tx Rx S 5 09V A2 3 28V 9 0V 3 3 3V In Pin D 5 04V C 3 1V 10 Gnd 1 3 3V 11 n c IC306 3 3V_TU IC502 IC503 IC504 2 5 45V Q303 3 3V...

Page 132: ...1 3 5 7 9 11 13 15 17 19 21 2 4 6 8 10 12 14 16 18 20 22 Connector P703 Configuration indicates signal pins 23 25 24 26 15 and 16 Is the Video Clock and Data lines ...

Page 133: ...133 July 2010 50PJ350 Plasma This concludes the Presentation Thank You End of Presentation End of Presentation ...

Search results

Summary of Contents for 50PJ340

Reviews:

Related manuals for 50PJ340

Brands by name

Popular brands

LG 50PJ340, Training Manual

Search results

Summary of Contents for 50PJ340

Reviews:

Related manuals for 50PJ340

Brands by name

Popular brands