LG 50PG20 Series Training Manual Download Page 42

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Plasma Spring 2009

50PG20

Switch Mode Power Supply Static Test (Forcing on the SMPS in sta

ges)

AC Power Applied AC Det (Pin 18) and 5V STB (Pins 9 ~ 12) are 5V.

100

Ω

¼ watt resistor added from 5V STB (Pins 9 ~ 12) to RL ON (Pin 19) closes relay RL101 turning on the 16V Supply

100

Ω

¼ watt resistor added from 5V STB (Pins 9 ~ 12) to VS _ON (Pin 20) brings the VA and VS Lines high

100

Ω

¼ watt resistor added from 5V STB (Pins 9 ~ 12) to M5V_ ON (Pin 21) brings the 5V VCC line high

Ground the Auto Ground (Pin 22) on P803

Remove AC between each test step

Summary of Contents for 50PG20 Series

Page 1: ...1 Advanced Single Scan Troubleshooting Training Manual 50PG20 Plasma Display 50PG20 Plasma Display 720p 720p ...

Page 2: ...l Board X Drive Boards Circuit Board Operation Troubleshooting and Alignment of Switch mode Power Supply Main Board Section 1 Section 2 Contact Information Preliminary Matters Specifications Plasma Overview General Troubleshooting Steps Disassembly Instructions Voltage and Signal Distribution OUTLINE OUTLINE ...

Page 3: ...an save time and money sometimes can be overlooked These techniques will also be presented This 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 Assem...

Page 4: ...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 5: ...ice 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 ...

Page 6: ...00 Technical Support and Part Sales 800 847 7597 USA Website GCSC aic lgservice com Customer Service Website us lgservice com LG CS Academy lgcsacademy com LG Web Training lge webex com Published March 2009 by LG Technical Support and Training LG Electronics Alabama Inc 201 James Record Road Huntsville AL 35813 ...

Page 7: ...wise noted 3 Be cautious of electric shock from the PDP module since the PDP module uses high voltage check that the Power Supply and Drive Circuits are completely discharged 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 pe...

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: ...asma Spring 2009 50PG20 9 This section of the manual will discuss the specifications of the 50PG20 Advanced Single Scan Plasma Display Panel 50PG20 Product Information 50PG20 Product Information 720p 720p ...

Page 10: ...PLASMA HDTV 50 Class 49 9 diagonal 720p HD Resolution Dual XD Engine 20 000 1 Contrast Ratio Fluid Motion 3x HDMI V 1 3 with Deep Color AV Mode Cinema Sports Game Clear Voice LG SimpLink Connectivity Invisible Speaker System 100 000 Hours to Half Brightness Typical PC Input ...

Page 11: ...65 H 768 V High definition television is the highest performance segment of the DTV system used in the US It s a wide screen high resolution video image coupled with multi channel compact disc quality sound 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 imp...

Page 12: ...Clear Voice Clearer dialogue sound Automatically enhances and amplifies the sound of the human voice frequency range to provide high quality dialogue 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 f...

Page 13: ...ressive as true Dolby Digital 5 1 the front and side surround effects are impressive but the rear surround effects fall a little short with the sense they are coming from just to rear of your head rather than from the back of the room Dolby Digital In thousands of cinemas and millions of homes worldwide Dolby Digital is the reigning standard for surround sound technology in general and 5 1 channel...

Page 14: ...e is 5 44 milliseconds Panel Response Time is less than 1 millisecond FluidMotion 180 Hz Effect Enjoy smoother clearer motion with all types of programming such as sports and action movies The moving picture resolution give the impression of performance of up to 3x the panels actual refresh rate 50PG20 Specifications 50PG20 Specifications FluidMotion FluidMotion Familiarization Familiarization ...

Page 15: ...Plasma Spring 2009 50PG20 15 50PG20 Remote Control 50PG20 Remote Control TOP PORTION BOTTOM PORTION ...

Page 16: ...Plasma Spring 2009 50PG20 16 Rear and Side Input Jacks Rear and Side Input Jacks ...

Page 17: ...pgrade Automatic Software Upgrade Automatic INFORMATION Current Ver 03 11 Update Ver 03 14 merged_50PG20_UA_0314_PDP_56 bin To start upgrading your TV set Please follow the procedures 1 Press an arrow key on your remote to reach START on the screen 2 Press ENTER key on your remote to start downloading If you do not want to download the upgrade file please press the arrow key to reach CANCEL on the...

Page 18: ...Plasma Spring 2009 50PG20 18 50PG20 Dimensions 50PG20 Dimensions ...

Page 19: ... Identification of the 50PG20 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 DISASSEMBLY SECTION DISASSEMBLY SECTION 720p 720p ...

Page 20: ...moving the Back Cover To remove the back cover remove the 26 screws The Stand does not need to be removed Indicated by the arrows PAY CLOSE ATTENTION TO THE TYPE SIZE AND LENGTH Of the screws when replacing the back cover Improper type can damage the front ...

Page 21: ... Y SUS Z SUS Right X Left X Main Digital FPC Control Logic Center X Power Supply FPC FPC FPC FPC FPC Panel ID Label Panel Voltage Label Side Inputs Y Drive Upper Y Drive Lower TCP Heat Sink Z SUB Rear Inputs Control Keys Power Button Invisible Speakers ...

Page 22: ...Y Drive PWBs Top Y Drive Board Removal Remove the 4 connectors going to the Flexible Ribbon Connectors for the Panel Remove the 3 screws holding the PWB in place Lift the PWB up to unseat the PWB from the screw Stand Off collars and pull the PWB away from the Y SUS PWB connectors Notes 1 All Plugs listed are from left to right Pin 1 2 3 ETC 2 Remember to be cautious of ESD as some semiconductors a...

Page 23: ... the way Remove the 2 Screws holding the decorative black plastic piece over the input jacks and remove Remove the two screws at the top of the Main PWB mounting brackets loosen the tape at the bottom of the bracket unplug P701 and CN701 and swing the PWB up and to the right Control Board Removal Remove the following connectors P111 P163 P162 P161 P151 Carefully remove the LVDS Cable P121 from the...

Page 24: ...rackets and Assemblies marked with A F will need to be removed This includes the Stand A Before an X Board can be removed the Heat Sink Assembly F will also need Removal X Circuit Board Removal X Circuit Board Removal Y SUS Z SUS E Right X Left X Main Digital Control Logic Center X Power Supply Y Drive E B F D C Y Drive A ...

Page 25: ...s to be removed Left X Drive P121 P101 through P104 Center X Drive P242 P241 P232 P211 P201 through P206 Right X Drive P331 P311 P503 P301 through P306 Remove the 4 screws for each PWB and remove the PWB One of the screws supports two PWBs Reassemble in reverse order Recheck Va Vs VScan VY Z Drive A Remove the Stand mounting support plastic piece B Remove the Stand Metal Support Bracket unplug AC ...

Page 26: ...Plasma Spring 2009 50PG20 26 Signal and Voltage Distribution Signal and Voltage Distribution ...

Page 27: ...s 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 SECTION 2 CIRCUIT OPERATION TROUBLESHOOTING AND SECTION 2 CIRCUIT OPERATION TROUBLESHOOTING AND CIRCUIT ALIGNMENT SEC...

Page 28: ... DC Va Vs 5 Adjusting Voltage 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 10 UL Approval Mark 11 UL Approval No 12 Model Name 13 Max Watt Full White 14 Max Volts 15 Max Amps ...

Page 29: ... ORDER IMPORTANT DC VOLTAGE ADJUSTMENTS 1 SMPS PWB Vs Va Always do SMPS first 2 Y SUS PWB Adjust Vy Vscan 3 Z SUS PWB Adjust Zbias WAVEFORM ADJUSTMENTS 1 Y SUS PWB Ramp Up Ramp Down The Waveform adjustment is only necessary 1 When the Y SUS PWB is replaced 2 When a Mal Discharge problem is encountered 3 When an abnormal picture issues is encountered Remember the Voltage Label MUST be followed it i...

Page 30: ...Y Vscan and Z Bias as they will vary from Panel to Panel SWITCHI SWITCHI MODE POWER SUPPLY Troubleshooting MODE POWER SUPPLY Troubleshooting 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...

Page 31: ...the sticker on the upper left side to confirm origin of the Panel or the White Label on the Power Supply itself to identify the PWB P N We will examine the Operation of the EAY41360901 Switch Mode Power Supply Part Number Switch Mode Power Supply Part Number ...

Page 32: ...2 4 6 8 10 12 14 16 18 20 22 15V GND 12V GND 5V 5V GND GND AC Det VS_ON AUTO 1 15V Power Supply PWB Layout Power Supply PWB Layout 1 2 3 4 5 6 7 8 9 10 Vs Vs GND GND GND Va Va GND M5V M5V 1 2 3 4 5 6 7 8 9 10 Vs Vs GND GND GND Va Va GND M5V M5V P801 P802 P803 Hot Ground Symbol represents a SHOCK Hazard ...

Page 33: ... Bias Voltages on the Y SUS Z SUS X Drive and Control Boards 16V Audio B Supply 12V 5V Signal Processing Circuits and Fan Drive Signal Processing Circuits Adjustments There are 2 adjustments located on the Power Supply Board VA and VS The 5V VCC is pre adjusted and fixed All adjustments are made with relation to Chassis Ground Use Full White Raster 100 IRE VA VS RV901 RV902 Switch Mode Power Suppl...

Page 34: ...rce AC Input VS Source VA Source Standby Source 16V 12V 5V Source U701 Sub Micon VA VR902 P802 P803 10Amp 230V Switch Mode Power Supply Circuit Layout Switch Mode Power Supply Circuit Layout No Connection PFC Circuit 380V Fuse F801 10Amp 230V To Y SUS To Z SUS To MAIN U801 Regulation ...

Page 35: ...rom either the Keyboard or the Remote IR Signal it outputs a high to RL ON which enters the SMPS Board at Pin 19 of P803 The RL ON command is sensed by the Sub Micon U701 circuit which causes the Relay Drive Circuit to close Relay RL101 bringing the primary source voltage up to full power by increasing the 155V standby to 330V At this time the 16V and 12V source becomes active and sent to the Main...

Page 36: ...Plasma Spring 2009 50PG20 36 Graphical Graphical representation of representation of Power Supply turn on Power Supply turn on sequence sequence ...

Page 37: ...Plasma Spring 2009 50PG20 37 Microprocessor Side Microprocessor Side Control of the Switch Control of the Switch Mode Power Supply Mode Power Supply Next two Slides show sequential turn on sequence ...

Page 38: ...Plasma Spring 2009 50PG20 38 Microprocessor Side Microprocessor Side Control of the SMPS Step 1 Control of the SMPS Step 1 ...

Page 39: ...Plasma Spring 2009 50PG20 39 Microprocessor Side Control of the SMPS Step 2 Microprocessor Side Control of the SMPS Step 2 ...

Page 40: ...This voltage will allow the Tuner Audio and Video Circuits on the Main Board to function and if connected to an Antenna Input Audio would be present If the Relays closed and these supplies failed suspect a problem with the SMPS The next step of operation calls for the M5V_ON line from the Main Board to the SMPS to go high on P803 pin 21 A high on the M5V_ON Line activates the 5V VCC line Loss of 5...

Page 41: ...ines have discharged before reconnecting the supply cables If the Y SUS and Z SUS PWBs are working normal when the SMPS comes up to full power on Display Panel Reset will be visible Shorting the Auto Pattern Gen test points at this time should result with test patterns on the screen if not check for 16V and VA to the X Boards If either Y SUS or Z SUS is causing the power supply to shutdown unplug ...

Page 42: ... and 5V STB Pins 9 12 are 5V 100Ω watt resistor added from 5V STB Pins 9 12 to RL ON Pin 19 closes relay RL101 turning on the 16V Supply 100Ω watt resistor added from 5V STB Pins 9 12 to VS _ON Pin 20 brings the VA and VS Lines high 100Ω watt resistor added from 5V STB Pins 9 12 to M5V_ ON Pin 21 brings the 5V VCC line high Ground the Auto Ground Pin 22 on P803 Remove AC between each test step ...

Page 43: ...Plasma Spring 2009 50PG20 43 STATIC TEST UNDER LOAD LIGHT BULB TEST STATIC TEST UNDER LOAD LIGHT BULB TEST ...

Page 44: ...tage Label Pull P803 Apply AC Power Power Supply Starts Use Chassis Ground This Power Supply will come up and run with NO load Use Full White Raster Va and Vs Adjustments Va and Vs Adjustments Y and Z SUS Runs Yes Pull 802 Y SUS Runs Yes Z SUS No Pull 801 Y and Z SUS will not Run Vs Va Va TP TP Pins 6 or 7 Vs TP Pins 1 or 2 P801 P802 ...

Page 45: ...nd 3 Voltage and Resistance Measurements for the SMPS All voltages from a working unit P801 CONNECTOR SMPS PWB to Y SUS P209 Pin Label STBY Run Diode Mode 1 Vs 0V 192V OL 2 Vs 0V 192V OL 3 nc nc nc nc 4 Gnd Gnd Gnd Gnd 5 Gnd Gnd Gnd Gnd 6 Va 0V 65V OL 7 Va 0V 65V OL 8 Gnd Gnd Gnd Gnd 9 M5V 0V 5V 897V 10 M5V 0V 5V 897V Diode Mode readings taken with all connectors removed ...

Page 46: ... and Voltages P802 Pin ID and Voltages P802 CONNECTOR SMPS PWB to Z SUS P3 Pin Label STBY Run Diode Mode 1 Vs 0V 192V OL 2 Vs 0V 192V OL 3 nc nc nc nc 4 Gnd Gnd Gnd Gnd 5 Gnd Gnd Gnd Gnd 6 Va 0V 65V OL 7 Va 0V 65V OL 8 Gnd Gnd Gnd Gnd 9 M5V 0V 5V 897V 10 M5V 0V 5V 897V Diode Mode readings taken with all connectors removed ...

Page 47: ...s ID and Voltages P803 Odd Pins ID and Voltages P803 CONNECTOR Odd SMPS to Main PWB P701 Pin Label STBY Run No Load Diode Mode 1 15V 0V 16V 16V 2 26V 3 Gnd Gnd Gnd Gnd Gnd 5 12V 0V 12V 12V 2V 7 Gnd Gnd Gnd Gnd Gnd 9 5V 5V 5V 5V 1 7V 11 5V 5V 5V 5V 1 7V 13 Gnd Gnd Gnd Gnd Gnd 15 Gnd Gnd Gnd Gnd Gnd 17 5_V Det 15V 5V 5V 1 56V 19 RL_On 0V 4 5V 0V 2 6V 21 M5V_ON 0V 3 2V 0V 2 6V ...

Page 48: ...3 CONNECTOR Even SMPS to Main PWB P701 Pin Label STBY Run No Load Diode Mode 2 15V 0V 16V 16V 2 6V 4 Gnd Gnd Gnd Gnd Gnd 6 12V 0V 12V 12V 2V 8 Gnd Gnd Gnd Gnd Gnd 10 5V 5V 5V 5V 1 7V 12 5V 5V 5V 5V 1 7V 14 Gnd Gnd Gnd Gnd Gnd 16 Gnd Gnd Gnd Gnd Gnd 18 AC Det 5V 5V 5V 2 56V 20 Vs_On 0V 3 2V 0V 2 7V 22 AUTO 0V 0V 5V 2 1V Diode Mode readings taken with all connectors removed ...

Page 49: ...to 0V after the relay opens No Va or Vs With Relay closed 330V OK then when relay opens it drops to 155V 5 16V Short Apply AC Power Power LED flashes Blue Relay clicks rapidly on and off 3 M5V Vcc Short Apply AC Power goes to flashing Red and Blue Relay Clicks On and Off 1 STBY 5V Short or Open Power LED does not light in stand by No Power button function 4 12V Short Power LED is lit Red in stand ...

Page 50: ...es the Panel Vertical Grid VS Supplies the Panel Horizontal Grid 5V Supplies Bias to Y SUS Z SUS Control and X Boards VY Sets the Negative excursion of the Y SUS Drive Waveform Y Y SUS PWB SECTION Overview SUS PWB SECTION Overview Adjustments DC Voltage and Waveform Checks Resistance Measurements VY V SET UP Ramp V Set Dn VSC 15V 5V FG Ramp UP sets Pitch of the Top Ramp of the Drive Waveform V Set...

Page 51: ... from the Control PWB P210 15V and Va to Center X PWB P206 P207 and P208 provide Logic Drive Signals to the Y Drive PWBs Y Drive TP Bottom Y Drive PWB This Voltage will read Positive Discrete Components No IPM Discrete Components No IPM Discrete Components No IPM FS701 Va 125V 10A FS202 5V 125V 10A Glass 250V 4A All fuses read 90V from chassis ground Voltage Label Related to Y SUS Floating Gnd Gnd...

Page 52: ...pleted VSC and VSC and VY Adjustments VY Adjustments Lower Left Side Of PWB This Voltage will read Positive Upper Left Side Of PWB Lower Left Side Of PWB These are DC level Voltage Adjustments Waveform just for reference VY ADJ VR501 VSC ADJ VR502 Bottom of lower Y Drive PWB VSC TP R202 Vy TP R201 ...

Page 53: ...ng either positive or negative slope use the Trigger Menu on the Scope Finally you will need to set the Trigger Level press the Trigger View and set the level as indicated in the picture below External Triggering of the Oscilloscope allows for a Stable Display of both the Y and Z SUS Output Waveforms regardless of how distorted the waveforms may be allowing the wave shape and phasing to be easily ...

Page 54: ... div the signal for Vsetup is now easier to recognize It is outlined within the Waveform Fig 3 Top At 200uSec per div the signal for Vsetup is now clearly visible It is outlined within the Waveform Fig 3 Lower At 20uSec per division the adjustment for Vsetup can be made Fig 2 Lower At 100uSec per division the waveform to use for Vsetup Is now isolated Fig 1 Lower At 400uSec per division the wavefo...

Page 55: ... outlined within the Waveform Fig 3 Top At 200uSec per div the signal for Vsetdn is now clearly visible It is outlined within the Waveform Fig 3 Lower At 20uSec per division the adjustment for Vsetdn can be made Fig 2 Lower At 100uSec per division the waveform to use for Vsetdn Is now isolated Fig 1 Lower At 400uSec per division the waveform to use for Vsetdn Is now isolated FIG1 FIG2 FIG3 Area to...

Page 56: ...Plasma Spring 2009 50PG20 56 Y Y Drive Waveform Test Point Lower Y Drive PWB Blow Up Drive Waveform Test Point Lower Y Drive PWB Blow Up Bottom of lower Y Drive PWB ...

Page 57: ... if Y SUS PWB Replaced V V Set Up and V Set Up and V Set Down Adjustments Set Down Adjustments Upper Right Side of PWB Upper Left Side of PWB Observe the Peak Portion of the waveform V SET UP VR 602 V SET DN VR 601 Observe the Time Portion of the waveform RAMP Bottom of lower Y Drive PWB V SET DOWN set too high can cause shut down ...

Page 58: ...form indicates a distorted Vset UP The peek widens due to the Vset UP peeking too quickly The center begins to wash out and arc due to Vset UP Peeking too late and alters the start of the Vset DN phase Panel Waveform Adjustment V Set Up Too High or Low V Set Up Too High or Low ...

Page 59: ...e center begins to wash out and arc due to decreased Vset DN time Panel Waveform Adjustment V Set V Set Dn Dn Too High or Low Too High or Low NOTE If Vset DN too high this set will go to excessive bright then shutdown To correct remove the LVDS from control PWB and make necessary adjustments ...

Page 60: ...High Approx 120uSec This is the Shutdown Threshold level Any higher the set will shut down Notice that the amplitude of the Set Down Bottom portion peak begins to decrease Time Time Peak GOOD NO GOOD NOTE If Vset DN too high this set will go to excessive bright then shutdown To correct remove the LVDS from Control PWB and make necessary adjustments 50V per Division 5V per Division 50V per Division...

Page 61: ...9 50PG20 61 Panel Waveform Adjustment The image will display some distortion in a quickly changing image When VSC is too low When VSC is too high VSC Too High or Low VSC Too High or Low Both of these are DC adjustments ...

Page 62: ...Logic signals needed to generate drive waveform Distributes 15V and VA Receive M5V Va Vs from SMPS Transfer Waveform to Y Drive Boards Center X Board Display Panel Power Supply Board SMPS FETs amplify Sustain Waveform Y Y SUS SUS Block Diagram Block Diagram NO IPMs Creates Floating 5V For Y Drive Board Creates 15V from 5V Distributes Floating 5V Z SUS Board Distributes 15V ...

Page 63: ...SUS_UP 0V 2V 2 87V 8 ER_DN 0V 1 2V 2 87V 9 ER_UP 0V 2V 2 87V 10 SET_UP 0V 0 26V 2 87V 45 46 Not Used 44 40 5V Out Pins 40 44 are 5V B to the Control PWB Roughly the first 39 pins dedicated to Y SUS In other words there is a ground between each pin However this connector has many more pins than shown Example Labels are on Control PWB silk screening This is a 50 Pin Connector Pin 1 here is Pin 50 on...

Page 64: ...SET_UP 0V 1 9V 2 87V 17 SET_DN 0V 1 4V 2 87V 18 X_ER 0V 2 9V 2 87V 19 Y_ENABLE 0V 0 6V 2 87V This Chart relates to the Labeling shown on the silk screening shown on the Control PWB 45 46 Not Used 44 40 5V Out 50 47 16V Pins 40 44 are 5V B to the Control PWB Roughly the first 39 pins dedicated to Y SUS In other words there is a ground between each pin However this connector has many more pins than ...

Page 65: ...P209 Plug Information Diode Mode readings taken with all connectors removed P209 CONNECTOR Y SUS to P801 Power Supply PWB Pin Label STBY Run Diode Mode 1 Vs 0V 192V OL 2 Vs 0V 192V OL 3 nc nc nc nc 4 Gnd Gnd Gnd Gnd 5 Gnd Gnd Gnd Gnd 6 Va 0V 65V OL 7 Va 0V 65V OL 8 Gnd Gnd Gnd Gnd 9 M5V 0V 5V 0 897V 10 M5V 0V 5V 0 897V ...

Page 66: ...n with all connectors removed P210 CONNECTOR Y SUS PWB to P242 X Drive Center Pin Label STBY Run Diode Mode 1 Va_C 0V 65V OL 2 Va_C 0V 65V OL 3 VPP_Out_XR 0V 62 4V OL 4 VPP_Out_XR 0V 62 4V OL 5 VPP_Out_XL 0V 62 3V OL 6 VPP_Out_XL 0V 62 3V OL 7 VPP_Out 0V 63 3V OL 8 VPP_Out 0V 63 3V OL 9 Gnd Gnd Gnd Gnd 10 Gnd Gnd Gnd Gnd 11 15V 0V 15 9V 0 95V 12 15V 0V 15 9V 0 95V ...

Page 67: ... waveform which selects the horizontal electrodes sequentially 50PG20 uses 8 DRIVER ICs on 2 Boards TOP BOTTOM 4 each 50G1 Panel has 768 Vertical lines of resolution Horizontal Grids determine V Resolution 4 Ribbons Tabs separated into 2 192 grids per tab 8 Ribbon inputs to 4 Tabs 96 lines per ribbon input 2 Buffers per Ribbon input 96 lines per ribbon input Y Drive Explained Y Drive Explained Y D...

Page 68: ...ng Ground 5VFG and Logic Signals from Y SUS Board are supplied to the Top Drive Board on Connector P100 5 Volts Floating Ground 5VFG input also enters the Bottom Y Drive Board at P200 Y Drive ID Y Drive ID P200 Floating Ground 5V U P P E R L O W E R Scan Scan Logic Signals from the Y SUS Board Floating Ground Floating Ground Floating Ground ...

Page 69: ...tire Ribbon Cable gently to release the Tabs on each end Gently slide the Ribbon Cable free from the connector Fig 1 To reinstall the Ribbon Cable carefully slide it back into the slot see Fig 2 be sure the Tab is seated securely and press the Locking Tab back to the locked position see Fig 3 Fig 2 Fig 3 Y Drive to Flexible Ribbon Panel Y Drive to Flexible Ribbon Panel TAB EXPOSED Lock Lock Lock U...

Page 70: ...e linearity Note the cable is crooked In this case the Tab on the Ribbon cable was improperly seated at the bottom This can cause bars lines intermittent lines abnormalities in the picture Remove the ribbon cable and re seat it correctly Y Drive Flexible Ribbon Incorrectly Seated Y Drive Flexible Ribbon Incorrectly Seated ...

Page 71: ...est on the DVM check the pins for shorts or abnormal loads Y Drive Upper Troubleshooting Y Drive Upper Troubleshooting Data DC1 DC2 LE CLK Data Out 5V 5V TEST POINT Data DC1 DC2 LE CLK Data Out 5V 5V READING Open Open Open Open Open Open Open Open ...

Page 72: ... Test on the DVM check the pins for shorts or abnormal loads Y Drive Upper Troubleshooting Y Drive Upper Troubleshooting Data DC1 DC2 LE CLK Data Out 5V 5V TEST POINT Data DC1 DC2 LE CLK Data Out 5V 5V READING 78 V 63 V 63 V 63 V 63 V 73V 53V 53V ...

Page 73: ...G20 73 Using the Diode Test on the DVM check the pins for shorts or abnormal loads Y Drive Upper Troubleshooting Y Drive Upper Troubleshooting Scan Drive READING 0 659V Floating Ground READING OPEN Scan Drive Floating Ground ...

Page 74: ... the Diode Test on the DVM check the pins for shorts or abnormal loads Y Drive Lower Troubleshooting Y Drive Lower Troubleshooting 5V 5V Data DC2 DC1 LE CLK TEST POINT 5V 5V DATA DC2 DC1 LE CLK READING Open Open Open Open Open Open Open ...

Page 75: ...ing the Diode Test on the DVM check the pins for shorts or abnormal loads Y Drive Lower Troubleshooting Y Drive Lower Troubleshooting 5V 5V Data DC2 DC1 LE CLK TEST POINT 5V 5V DATA DC2 DC1 LE CLK READING 52V 52V 78V 61V 62V 62V 62V ...

Page 76: ...0 76 Using the Diode Test on the DVM check the pins for shorts or abnormal loads Y Drive Lower Troubleshooting Y Drive Lower Troubleshooting Scan Drive READING 0 659V Floating Ground READING OPEN OL Scan Drive Floating Ground ...

Page 77: ... ANY OUTPUT LUG READING 0 73 V Buffer IC OUTPUT LUGS BLACK LEAD ON BUFFER IC RED LEAD ON ANY OUTPUT LUG READING OPEN YOU CAN CHECK ALL 8 BUFFER ICs USING THIS PROCEDURE 4 per PWB YOU CAN CHECK ALL 8 BUFFER ICs USING THIS PROCEDURE 4 per PWB Any of these output lugs can be tested Look for shorts indicating a defective Buffer IC Indicated by Red outline BACK SIDE OF Y DRIVE PWB Indicated by Red outl...

Page 78: ...rd Assembly Upon completion of this section the Technician will have a better understanding of this section the Technician will have a better understanding of the circuit and be able to locate of the circuit and be able to locate voltage and resistance test points needed for troubleshooting an voltage and resistance test points needed for troubleshooting and alignment d alignment Troubleshooting t...

Page 79: ...3 To Z SUB PWB P2 FS1 Vs 250V 4A P4 P5 FS2 5V 125V 10A Z Z SUS SUS PWB Layout PWB Layout FS3 16V 125V 1 5A Discrete Components No IPMs Discrete Components No IPMs Voltage Label related to Z SUS Service Bulletin Related to this PWB Please read first before ordering Related to Gender of plugs P4 and P5 Z Bias Test Point Bottom of either R49 or R50 ...

Page 80: ...ard then to the FPC Flexible Printed Circuit Z Z SUS Waveform SUS Waveform Z Bias is a DC adjustment using a DVM The effects of this adjustment can be observed on the scope looking at the Z SUS output Use Caution legs are close together Scope probe connected to C404 top leg Note Any cap can be used on the Z SUB board Bottom and top caps use bottom leg Center cap use upper leg 52V AC RMS use just a...

Page 81: ...s measured from VZB Test Point to Chassis Ground Adjust to the level indicated on the Voltage Sticker on the upper Left Hand side of the Panel Z Z SUS Adjust SUS Adjust Upper Right Hand Side of the Z SUS PWB Z Bias Test Point Bottom of either R49 or R50 ...

Page 82: ...rd Board Input Voltages from the SMPS Board Input Voltages from the SMPS Board Z Z SUS PWB Understanding SUS PWB Understanding Z Bias Voltage is used to Bias the output circuits driving the Sustain and Erase Pulses removing previous images from the PDP Z bias is measured from the Vzb TP on the Z SUS Board and adjusted by VZB Adj Input Voltages from the Control Board Input Voltages from the Control...

Page 83: ...plifies Z Sustain waveform Distributes Logic Signals Distributes M5V VA VS FETs amplify Drive waveform Display Panel Via FPC flexible printed circuit Control Board Z SUS Receive M5V VA VS NO IPMs Power Supply Board SMPS Distributes 15V Received from Y SUS Y SUS Board Note VA not used by Z SUS board ...

Page 84: ...ng 2009 50PG20 84 Z Z SUS Noise Dampening Pads Back Side SUS Noise Dampening Pads Back Side Make sure the replacement PWB comes with the noise reducing pads If they do not contact parts about sending the two pads ...

Page 85: ...US DN 0V 16V 2 69V 2 SUS UP 0V 16V 2 69V 3 ER DN Gnd Gnd Gnd 4 ZBIAS 0V 0 48V 2 85V 5 ZB CON 0V 0 27V 2 85V 6 ER UP 0V 0 1V 2 85V 7 ENABLE 0V 0 06V 2 85V 8 none Gnd Gnd Gnd 9 none 0V 0V 2 85V 10 none 0V 1 93V 2 85V 11 none 0V 2 66V 0 66V 12 none Gnd Gnd Gnd Note Pin 1 is actually Pin 12 on the Control Board This is because the pin numbers are inverted from the Control PWB Diode Mode readings taken...

Page 86: ...stance Voltage and Resistance Measurements for the Z SUS Board P3 CONNECTOR Z SUS to P802 Power Supply PWB Pin Label STBY Run Diode Mode 1 Vs 0V 192V OL 2 Vs 0V 192V OL 3 nc nc nc nc 4 Gnd Gnd Gnd Gnd 5 Gnd 0V 0V Gnd 6 Va 0V 65V OL 7 Va 0V 65V OL 8 Gnd Gnd Gnd Gnd 9 M5V 0V 5V 1 3V 10 M5V 0V 5V 1 3V Note Va is not Used on the Z SUS board It is an Open connection ...

Page 87: ...er 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 resistance test points needed for troubleshooting Main Board Supplied LVDS Signal Operating Voltages Operating Voltages Y Y SUS SUS Supplied Supplied 15V supplied to Control board from the Y SUS board But routed through Contr...

Page 88: ...Control PWB Identified 88 Pins inverted On Y SUS P111 To Y SUS IC121 P164 P131 For Software Upgrades IC212 IC213 IC101 IC211 IC133 IC171 P162 P161 P151 IC122 IC201 MCM P121 LVDS To Main P163 Auto Gen Test Pattern Temp LEDs P160 F111 F112 No Connection ...

Page 89: ...rial Control PWB Pictorial Quick observation Of Temp LEDs Tell if the Control Board is running Confirm B to Control PWB VS_DA Control PWB Check 3V 3 3V Confirm Crystal Is running 15V to Z SUS 15V and 5V From Y SUS Confirm B to Control PWB Check 5V ...

Page 90: ...the following 1 Disconnect the Main PWB from all connectors Apply AC power Since P803 is not connected the set will come on Short the two pins on the Auto Test Pattern lands If there is a picture of cycling colors the Y SUS Y Drive Z SUS Power Supply Control PWBs and Panel are all OK Same test for 2 to tell if the No Video is caused by the Main PWB If testing the Z SUS for functionality when the Y...

Page 91: ...50PG20 91 Check the output of the Oscillator package The frequency of the sine wave is 50 MHZ Missing this clock signal can halt operation of the unit 50Mhz Checking the Crystal Checking the Crystal Clock Clock 500mV 40ns ...

Page 92: ...hese Signals would confirm the failure is on the Main Board Example of Normal Signals measured at 200mv cm at 5µs cm Menu OSD Off Menu OSD ON LVDS Cable P121 on Control PWB shown Press two outside tabs inward to release Control LVDS Signals Control LVDS Signals 1 3 5 7 9 11 13 15 17 19 21 2 4 6 8 10 12 14 16 18 20 22 Connector P302 Configuration indicates signal pins P302 on Main Board Press Inwar...

Page 93: ...kage ICs If there is a bar defect on the screen it could be a Control Board problem Control Board to X Board Address Signal Flow Control PWB Signal Block Control PWB Signal Block MCM 16 line Resistor Array 256 Lines output Total per TCP Basic Diagram of Control Board IC201 2 Buffer Outputs per TCP CONTROL PWB X DRIVE PWB PANEL 128 Lines per Buffer 256 X 16 4096 4096 3 1365 R G B Vertical Grids Hor...

Page 94: ...tors removed P163 CONNECTOR Control PWB to P2 Z SUS Pin Label STBY Run Diode Mode 1 ZSUS DN Gnd Gnd Gnd 2 ZSUS UP 0V 2 7V 1 28V 3 Z ER DN 0V 1 9V 1 28V 4 Z ER UP 0V 0V 1 28V 5 VZD SEL Gnd Gnd Gnd 6 Z BIAS 0V 0 06V 1 28V 7 Z ENABLE 0V 0 1V 1 28V 8 none 0V 0 27V 1 28V 9 none 0V 0 48V 1 28V 10 none Gnd Gnd Gnd 11 none 0V 15 9V 1 15V 12 none 0V 15 9V 1 15V Pin configuration is inverted on the Z SUS PW...

Page 95: ...pin 23 Pins 23 through 60 are the Y SUS drive signals There is a ground between each pin Actual Pin 1 through 10 of P160 are not used in this model Pins 17 through 21 are 5V However this connector has many more pins than the Labels show Example The Labels outlined are on the silk screening This is a 60 Pin Connector to the Y SUS board P160 This connector is a little confusing in its labeling FL111...

Page 96: ...p for 5V Check Slide 2 of 3 Quick 5V Check V Check P111 CONNECTOR Control PWB to P102 Y SUS PWB Pins 17 18 19 20 and 21 Deliver 5V to the Control PWB from the Y SUS Easy to check using 20th hash mark 20th hash mark No problem making a voltage reading since 17 21 connectors are the same voltage Pin 1 Pin 60 5V Label 5V Fuses ...

Page 97: ... c OL 23 Y Enable 0V 0 6V 1 37V 24 Gnd Gnd Gnd Gnd 25 X_ER 0V 2 9V 1 36V 26 Gnd Gnd Gnd Gnd 27 Set_DN_2 0V 1 4V 1 37V 28 Gnd Gnd Gnd Gnd 29 SET_UP 0V 1 9V 1 37V 30 Gnd Gnd Gnd Gnd 31 SLOPE_RETE 0V 0V 1 37V 32 Gnd Gnd Gnd Gnd 33 DET_LEVEL 0V 0V 1 37V 34 Gnd Gnd Gnd Gnd 35 DELTA_Vy 0V 0 16V 1 37V 36 Gnd Gnd Gnd Gnd 37 PASS_TOP 0V 0 2V 1 37V 38 Gnd Gnd Gnd Gnd 39 Set_DN2 0V 0 2V 1 37V 40 Gnd Gnd Gnd ...

Page 98: ...ontrol PWB Plug P121 LVDS Plug LVDS Plug Location and Explanation Location and Explanation CONTROL PWB P121 LOCATION Pins are very close together making voltage checks risky Use P302 on the Main PWB for checks Shows connector location on the Control PWB ...

Page 99: ... Diode Mode Pin STBY Run Diode Mode 1 Gnd Gnd Gnd 2 0V 0V 1 10V 3 0V 0V 1 10V 4 0V 1 26V 1 10V 5 0V 1 19V 1 10V 6 Gnd Gnd Gnd 7 0V 1 26V 1 10V 8 0V 1 19V 1 10V 9 0V 0V 1 10V 10 0V 0V 1 10V 11 0V 1 15V 1 10V 12 0V 1 26V 1 10V 13 Gnd Gnd Gnd 14 Gnd Gnd Gnd 15 0V 0V 1 10V 16 0V 0V 1 10V 17 0V 0V 1 10V 18 0V 0V 1 10V 19 Gnd Gnd Gnd 20 0V 0 21V 1 10V 21 0V 0V 1 10V 22 0 89V 0 56V 1 10V 23 0V 5 29V 1 10...

Page 100: ...l PWB Plug P151 P161 P161 P163 Resistance Readings P163 Resistance Readings As can be seen from the Picture below these connectors are protected by coating and are too close together for safe readings UNABLE TO READ THESE CONNECTORS THEY ARE COVERED IN SILICON ...

Page 101: ...WBs X Drive PWBs ABUS ABUS Left X Board Right X Board P233 P121 P311 P211 P331 P232 P241 P242 P101 P102 P103 P104 P201 P202 P203 P204 P205 P206 P301 P302 P303 P304 P305 P306 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 ...

Page 102: ...Plasma Spring 2009 50PG20 102 TCP IC s shown are part of the Ribbon Cable X Drive Left PWB X Drive Left PWB ABUS ABUS ...

Page 103: ...Plasma Spring 2009 50PG20 103 X Drive Center PWB X Drive Center PWB ABUS ABUS ...

Page 104: ...Plasma Spring 2009 50PG20 104 X Drive Right PWB X Drive Right PWB ABUS ABUS TCP IC s shown are part of the Ribbon Cable ...

Page 105: ...CP Tape Carrier Carrier Package Package TCP Connector Removal Lift up the lock as shown by arrows The Lock can be easily broken It needs to be handled carefully Pull TCP apart as shown by arrow TCP Film can be easily damaged Handle with care ...

Page 106: ...age Package 128 lines per buffer 128 lines per buffer 256 lines per TCP 16 TCPs total 6x6x4 4096 Total Vertical Lines divided by 3 RGB per pixel 1365 Horizontal Pixel Count TCP Connector Frame X_B D Front panel Horizontal Address Rear panel Vertical Address Control Board TCP Taped Carrier Package Flexible Cable Y SUS Board Va Logic Flex Cable X Drive Board Heat Sink To X Board ...

Page 107: ...PG20 107 TCP Testing TCP Testing Typical Reading 0 65V Opposite reads open On any Gnd On any Va 4 5 6 7 or 44 45 46 47 10 11 12 13 14 27 28 2 9 30 37 38 39 40 41 Look for any ribbon Damage Cracks folds Pinches scratches etc ...

Page 108: ...tage Distribution RGB Address Signals out to TCP IC s X Board Voltage Distribution X Board Voltage Distribution NOTE VPP will meter slightly lower than VA VPP is used to control current draw depending on color presence for that TCP to display ...

Page 109: ...o shutdown b Generate abnormal vertical bars c Cause the entire area driven by the TCP to be All White d Cause the entire area driven by the TCP to be All Black e Cause a Single Line defect 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 ...

Page 110: ...on covered which prevents the ability to read With these connectors Check carefully for their seating accuracy Improper seating can lead to many different symptoms Lines bars noise ect All Vertical in nature P232 X Drive C receives 3 3V for the X PWBs Easy to check use the pad for pins 10 11 and 12 X Drive C X Drive R X Drive C P232 X Drive R receives 3 3V Easy to check use the pad for pins 50 51 ...

Page 111: ...ector P211 Voltages and Resistance P211 CONNECTOR X Center PWB to P311 X Left Pin Label STBY Run Diode Mode 1 VPP_Out 15V 65V OL 2 VPP_Out 15V 61 8V OL 3 VPP_Out 15V 61 1V OL 4 VPP_Out 15V 62 2V OL 5 NC 0V 0V OL 6 15V_R 0V 16V 2 91V 7 Gnd Gnd Gnd Gnd 8 Gnd Gnd Gnd Gnd VPP_Out Voltages vary with video content Diode Mode readings taken with all connectors removed ...

Page 112: ...nector P311 Voltages and Resistance X Drive Center Connector P311 Voltages and Resistance P311 CONNECTOR X Left PWB to P211 X Center Pin Label STBY Run Diode Mode 1 Gnd Gnd Gnd Gnd 2 Gnd Gnd Gnd Gnd 3 15V_R 0V 16V OL 4 NC 0V 0V OL 5 VPP_Out 15V 62 2V OL 6 VPP_Out 15V 61 1V OL 7 VPP_Out 15V 61 8V OL 8 VPP_Out 15V 65V OL VPP_Out Voltages vary with video content ...

Page 113: ...sistance Diode Mode readings taken with all connectors removed P242 CONNECTOR X Drive C PWB to P210 Y SUS Pin Label STBY Run Diode Mode 1 Va_C 0V 65V OL 2 Va_C 0V 65V OL 3 VPP_Out_XR 0V 62 4V OL 4 VPP_Out_XR 0V 62 4V OL 5 VPP_Out_XL 0V 62 3V OL 6 VPP_Out_XL 0V 62 3V OL 7 VPP_Out 0V 63 3V OL 8 VPP_Out 0V 63 3V OL 9 Gnd Gnd Gnd Gnd 10 Gnd Gnd Gnd Gnd 11 15V 0V 15 9V OL 12 15V 0V 15 9V OL ...

Page 114: ...CP connectors P101 P104 P201 P206 P301 P306 TCP on Flexible ribbon cable Carefully lift the TCP ribbon up and off the cushion and out of the way TCP Flexible ribbon cable After removing the back cover Main PWB is lifted out of the way 15 screws removed from heat sink covering TCPs and heat sink removed the X Drive PWBs can be removed Cushion Lift Evenly ...

Page 115: ...letion of this Section the technician will have a better understanding of the operation of the circuit and will be able to locate voltage and resistance test points needed for troubleshooting and alignments 2 5V 3 3V 2 5V 9V 5V 12V 16V Developed on the Main Board DC Voltage and Waveform Checks Resistance Measurements Main PWB Troubleshooting Main PWB Troubleshooting ...

Page 116: ...S To Control RGB PC P701 P302 P303 To Power Supply HDMI inputs OPTICAL AUDIO RS232 SPK Out Front Controls CN701 Main PWB Layout and Identification Main PWB Layout and Identification AV In 3 X400 25 Mhz X100 12 Mhz Reset SW100 IC902 n IC902 1 0V 2 OV 3 OV 4 5V 5 0 20V Pin 1 Pin 16 LD703 LD400 Q706 USB HDMI 3 ...

Page 117: ...s Main PWB Back Side Regulator Checks IC705 IC709 IC706 IC701 n n n IC708 n IC501 n Bottom Leg Pin 1 IC805 n Be sure to prevent the PWB from touching the frame while the PWB is turned over Use a piece of cardboard or towel to insulate n n IC702 P302 P701 JK501 P303 ...

Page 118: ...r with Shield Off Tuner with Shield Off Video Pin 16 Audio SIF Pin 14 Pin 16 Pin 1 Pin 14 Pin 3 5V Pin 3 SCL Pin 8 SDA Pin 7 Pin 8 Pin 7 TU400 LD400 Tuner Osc Lock On Unlocked Off Locked IC400 Tuner Controller X400 Tuner Controller Osc ...

Page 119: ... 1 0V 0V Open 3 0V 0V Open 5 0V 0V Gnd 7 0V 0V Gnd 9 0 89V 3 29V 1 64V 11 0V 1 25V 1 16V 13 0V 1 25V 1 16V 15 0V 1 27V 1 16V 17 0V 1 22V 1 16V 19 0V 1 24V 1 16V 21 0V 1 24V 1 16V 23 0V 0 58V 1V 25 0V 3 29V OL Pin SBY Run Diode Mode 2 0V 0V OL 4 0V 0V OL 6 Gnd Gnd Gnd 8 Gnd Gnd Gnd 10 0 89V 3 29V 1 64V 12 0V 1 21V 1 16V 14 0V 1 21V 1 16V 16 0V 1 21V 1 16V 18 0V 1 25V 1 16V 20 0V 1 21V 1 16V 22 0V 1...

Page 120: ...bel STBY Run Diode Mode 1 IR 5V 5V 2 97V 2 Gnd OV OV Gnd 3 KEY2 OV 3 29V 1 17V 4 Gnd Gnd Gnd Gnd 5 KEY1 OV 3 29V 1 17V 6 Gnd OV OV Gnd 7 STBY_5V 5V 5V 0 79V 8 Gnd Gnd Gnd Gnd 9 RED_R OV OV 1 11V 10 Gnd Gnd Gnd Gnd 11 RED_G OV 2 84V 1 11V 12 Gnd Gnd Gnd Gnd Diode Mode readings taken with all connectors removed P303 CONNECTOR MAIN PWB to Front Keys ...

Page 121: ...e Mode readings taken with all connectors removed P701 CONNECTOR Main Odd Pins to P803 SMPS PWB Pin Label STBY Run Diode Mode 1 15V 0V 16V 2 87V 3 Gnd Gnd Gnd Gnd 5 12V 0V 12V OL 7 Gnd Gnd Gnd OL 9 5V 5V 5V 0 79V 11 5V 5V 5V 0 79V 13 Gnd Gnd Gnd Gnd 15 Gnd Gnd Gnd Gnd 17 5_V Det 15V 5V 3 24V 19 RL_On 0V 4 5V OL 21 M5V_ON 0V 3 2V 1 21V With Plug 1 21 1 21 Without Plug ...

Page 122: ...iode Mode readings taken with all connectors removed P701 CONNECTOR Main Even Pins to P803 SMPS PWB Pin Label STBY Run Diode Mode 2 15V 0V 16V 2 8V 4 Gnd Gnd Gnd Gnd 6 12V 0V 12V OL 8 Gnd Gnd Gnd Gnd 10 5V 5V 5V 0 79V 12 5V 5V 5V 0 79V 14 Gnd Gnd Gnd Gnd 16 Gnd Gnd Gnd Gnd 18 AC Det 5V 5V 2 79V 20 Vs_On 0V 3 2V 1 21V 22 AUTO 0V 0V Gnd With Plug 2 22 Without Plug 2 22 ...

Page 123: ...g Main PWB Speaker Plug JK501 Voltages and Resistance Main PWB Speaker Plug JK501 Voltages and Resistance JK501 Diode Mode readings taken with all connectors removed JK501 CONNECTOR Main to Speakers Pin STBY Run Diode Mode 1 0V 8V 2 58V 2 0V 8V 2 58V 3 0V 8V 2 58V 4 0V 8V 2 58V Main PWB Lower Left ...

Page 124: ...Section 11 X 17 Foldout Section This section shows the 11X17 foldout that This section shows the 11X17 foldout that s available in the Paper s available in the Paper and Adobe version of the Training Manual and Adobe version of the Training Manual ...

Page 125: ...1 disconnected P802 connected No SUS waveforms are produced due to a loss of control PWB B routed through the Y SUS PWB Test points are open lands at P102 with pin one at the bottom 50PG20 INTERCONNECT DIAGRAM FS201 Vs 250V 4A IC121 IC151 IC171 IC902 5 29V 4 5V 3 0V 2 0V 1 0V IC709 1 3 29V 2 1 26V 3 0V IC708 1 5V 2 3 3V 3 0V IC705 1 5V 2 3 29V 3 0V IC706 1 5V 2 3 64V 3 1 38V IC501 1 3 3V 2 1 8V 3 ...

Page 126: ...f 20 17 Menu On 16 Menu Off 19 05 Menu On 04 Menu Off 16 15 Menu On 14 Menu Off 15 07 Menu On 06 Menu Off 14 13 Menu On 12 Menu Off 13 09 Menu On 08 Menu Off 12 11 Menu On 10 Menu Off 11 Ref State Pin P302 01 Menu On 00 Menu Off 22 19 Menu On 18 Menu Off 21 03 Menu On 02 Menu Off 20 17 Menu On 16 Menu Off 19 05 Menu On 04 Menu Off 16 15 Menu On 14 Menu Off 15 07 Menu On 06 Menu Off 14 13 Menu On 1...

Page 127: ...129 Plasma Spring 2009 50PG20 This concludes the Presentation Thank You End of Presentation End of Presentation ...

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