Page 1 Training Manual 42PW350 Pl 42PW350 Plasma Display Di l Advanced Single Scan Troubleshooting 42" Class HD 720p Plasma TV 42" Class HD 720p Plasma TV (41.6" diagonally) P bli h d J Published June 17 , 2011 2011 Updated September 06...
Page 2 • Control Board • 2 X Drive Boards (Left and Right) • Main Board • Interconnect Diagram: Interconnect Diagram: 11X17 Foldout Section used as a quick reference sheet 11X17 Foldout Section used as a quick reference sheet. June 201 1 42PW350 Plasma...
Page 3 Overview of Topics to be Discussed 42PW350 Plasma Display 42PW350 Plasma Display The first section will cover Contact Information and Important Safety Precautions for the Customers Safety as well as the Technician and the Equipment. Basic Troubleshooting Techniques which can save time and money sometimes can be overlooked.
Page 4 Plasma Control Board ROM Update (Jig required) t l B d ROM U d t (Ji i d) Published June 2011 by LG Technical Support and Training LG Electronics Alabama Inc LG Electronics Alabama, Inc. 201 James Record Road, Huntsville, AL, 35813.
Page 5 When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty but may lead to property damage or user injury modifications will not only void the warranty, but may lead to property damage or user injury.
Page 6 Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help. June 201 1 42PW350 Plasma...
Page 7 1. Check the appearance of the Replacement Panel and Circuit Boards for both physical damage and part number accuracy. 2. Check the model label. Verify model names and board model matches. 3. Check details of defective condition and history. Example: Y-SUS or Y-Drive Board Failure, Mal-discharge on screen, etc. June 201 1 42PW350 Plasma...
Page 8 The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer. June 201 1 42PW350 Plasma...
Page 9 42PW350 PRODUCT INFORMATION SECTION This section of the manual will discuss the specifications of the 42PW350 Advanced Single Scan Plasma Display Television. June 201 1 42PW350 Plasma...
Page 10 42PW350 Specifications 720P PLASMA HDTV 42" Class (41.6" diagonal) • 3D Capable TV • 2D to 3D Conversion • TruSlim Frame • 600Hz Max Sub Field Driving • 600Hz Max Sub Field Driving For Full Specifications • High Definition Resolution See the Specification Sheet •...
Page 11 42PW350 Logo Familiarization Page 1 of 3 HD RESOLUTION 720P HD R HD RESOLUTION 720P HD Resolution Pixels: 1365 (H) × 768 (V) l ti 1365 (H) 768 (V) See and experience more. Pictures are sharper. Colors are more vibrant. Entertainment is more real.
Page 12 42PW350 Logo Familiarization Page 2 of 3 600Hz Sub Field Firing: 600Hz Sub Field Firing: Capture every moment. Tired of streaky action or unclear plays during the game? See sports, fast action and video games like never before. The 600Hz refresh rate virtually eliminates motion blur.
Page 13 42PW350 Logo Familiarization Page 3 of 3 AV Mode "One click" Cinema, Sports, Game mode. AV Mode is three preset picture and audio settings. It allows the viewer to quickly switch between common settings. It includes Cinema, Sports, and Game Modes.
Page 14 600 Hz Sub Field Driving is achieved by using 10 sub-fields per frame process (vs. Comp. 8 sub-field/frame) • No smeared images during fast motion scenes Original Image 10 Sub Fields Per Frame Sub Field firing occurs using wall charge and polarity differences between Y-SUS and Z-SUS signals. June 201 1 42PW350 Plasma...
Page 15 42PW350 Remote Control BOTTOM PORTION p/n AKB72914273 TOP PORTION June 201 1 42PW350 Plasma...
Page 16 42PW350 Rear and Side Input Jacks SIDE INPUTS USB for Music, Photos and Software AC In Upgrades Upgrades REAR REAR INPUTS HDMI 3 Composite Video/Audio June 201 1 42PW350 Plasma...
Page 17 Do not remove AC power or the USB Flash Drive. 9) Your TV will be restarted automatically. Do not turn off Power, during the upgrade process. Software Files (when available), can be downloaded from GCSC or GSFS.com June 201 1 42PW350 Plasma...
Page 18 2) Press “In-Start” 3) A Password screen appears. 4) Enter the Password. Note: A Password is required to enter the Service Menu. Enter; 0000 te ; 0000 Note: If 0000 does not work use 0413. MKJ39170828 105-201M June 201 1 42PW350 Plasma...
Page 19 42PW350 Dimensions There must be at least 4 inches of Clearance on all sides 2" 39" 50.8mm 990.6mm 19-1/2" Center Center 495.3mm 4-11/16" 119mm 11-9/16" 15-3/4" 293.5mm 400mm Center 12-1/8" 307.34mm 26.5/16" 668.02mm 15-3/4" 400mm 24-3/16" Model No. 614.68mm Serial No.
Page 20 SERVICE AND ADJUST MENU ITEMS This section of the manual will discuss the Service Menu and the Adjust Menu In the 42PW350 Advanced Single Scan Plasma Display Panel. In the 42PW350 Advanced Single Scan Plasma Display Panel. Upon completion of this section the Technician will have a better understanding of the Service and Adjust Menus used in this model.
Page 21 42PW350 Service Menu First Page Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. Country Group IN START Adjust Check Software Version Model Name: 42PW350-UA 1. Adjust Check 1. Country Group (Press OK to Save) Serial Number: 010PTZK1F285 2.
Page 22 42PW350 Power Off Status (IN START) Screen Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. IN START Power Off Status 1. Adjust Check Model Name: 42PW350-UA 0. POWER_OFF_BY_LOCAL_KEY Most Recent 2. ADC Data Serial Number: 010PTZK1F285 1.
Page 23: Table Of Contents
42PW350 Power Off Status Details CODE EXPLANATION POWER_OFF_BY_CPUCMD Power off by CPU Command POWER_OFF_BY_ABN Power off by abnormal status POWER_OFF_BY_KEYTIMEOUT Power off when TV is not turned off during a certain time POWER_OFF_BY_ACDET Power off by not detecting AC (abnormal case)
Page 24: Power_Off_By_Sw_Dl
42PW350 Lip Sync Adjust (IN START) Screen Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. IN START SYSTEM 1 Model Name: 42PW350-UA 1. Adjust Check 0. Baudrate 115200 2. ADC Data Serial Number: 010PTZK1F285 1.
Page 25 42PW350 UTT Reset (IN START) Screen Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. IN START SYSTEM 1 1. Adjust Check Model Name: 42PW350-UA 0. Baudrate 115200 2. ADC Data Serial Number: 010PTZK1F285 1.
Page 26 42PW350 Service Menu: Panel Control Shows Control Board Information Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. Panel Control IN START 1. AV/PC 1. Adjust Check Model Name: 42PW350-UA 2. ISM...
Page 27 42PW350 Model Number Download Screen Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. When the Main Board is replaced, the Model Number and Serial Number must be corrected. Follow these instructions Scroll down to item 6.
Page 28 42PW350 Power Error History (IN START) Screen Bring up the Service Menu using the Service Remote by pressing “In-Start” enter password 0413 or 0000. IN START POWER ERROR HISTORY 1. Adjust Check Model Name: 42PW350-UA 1. Last History: VA UVP 2.
Page 29 “EDID AC3 ”. then AC3 will now be “NG”. Note: AC3 is changed from NG to OK/(AC3) If Reset is selected, “Erasing” will appear and then this shows then PCM will now be “NG”. “NG”. June 201 1 42PW350 Plasma...
Page 30 4) Press the (1) Key 5 times. 2) Bring up the Customer’s Menu. Highlight The Host Diagnostics screen appears. “CHANNEL”. Press “ENTER” on the remote. 3) The “CHANNEL” Menu appears. See next page for details. June 201 1 42PW350 Plasma...
Page 31 Number Selected Current Channel (Main) Host Information Blocked or Not Blocked Model Name : 42PW350-UA (Plasma Display) Channel Info : Digital 19-1 Memory Parental Control : Channel is not blocked F = 9/5 (C+32) FLASH : 131072 KB Current Temperature...
Page 32 Release the button when the green LED light turns on. Then, you will see the green light blink three times before the device is switched off. If you switch the power on again, the glasses will be connected to the TV or PROJECTOR with the strongest signal. June 201 1 42PW350 Plasma...
Page 33 June 201 1 42PW350 Plasma...
Page 34 June 201 1 42PW350 Plasma...
Page 35 2) Top and Bottom Plasma (Active) Synchronization required 3) Checkerboard between glasses and TV 4) Frame Sequential (Full Resolution available) HDMI 1.4 (Only) L / R represents; Left Camera View 5) Over/Under Right Camera View Right Camera View June 201 1 42PW350 Plasma...
Page 36 LG 3D TV 3D broadcasting Online 3D for All types of broadcasting signals Broadcasting Broadcasting Video Input of broadcasting signal Press “3D” button for mode change Select type of input source, Press “ENTER”. In case 3D looks *abnormal, press “3D Settings”...
Page 37 The image is broadcast using two different viewing angles every other frame. The 3D Glasses are then synchronized with the two different images to give the 3D effect. They are blanked between scene changes. June 201 1 42PW350 Plasma...
Page 38 LG RF 3D Emitter & Glasses Convenient 2.4GHz RF Transmitter built-in to TV • Wider viewing angle 2~7 Meter Viewing Distance (6.5 ft~ 22.9 ft) • Longer Viewing distance Maximum 10 Meter (32.8 ft) • Longer battery life (1.5h charging / 40h battery life) •...
Page 39 Twisted State light passes light passes O St t li ht bl On State light blocked TV with built in TV with built in *TN CD h *TN LCD shutter RF Transmitter *TN = Twisted Nematic June 201 1 42PW350 Plasma...
Page 40 3D Picture Balance: Adjusts the color and brightness difference between the right and left sides of the picture in 3D mode. 3D Picture Correction: Changes the order of images in the right and left sides of the picture in 3D mode. June 201 1 42PW350 Plasma...
Page 41 1920X1080 33.75 Input Checker Board, MPO (Photo) Additional HDMI 1.4V Information. 1) 3D Auto Detection (LG Does Support 2) Ethernet Capabilities (LG Does Not Support) 3) Return Audio (LG Supported using SIMPLINK®) 2011 Models only. June 201 1 42PW350 Plasma...
Page 42 42PW350 3D Troubleshooting Flow Chart Page 1 of 3 If you are having trouble seeing 3D, Try changing the 3D selection types if it is difficult to determine what format the 3D movie is in. Example: Top/Bottom, Side by Side, Checker Board, Frame Sequential.
Page 43 42PW350 3D Troubleshooting Flow Chart Page 2 of 3 Continued from previous page Note: Motion Remote board Connector has no ID 3.48V p/p Check for 60Hz sync to the 3D sync / Motion 60 Hz Remote board. Connector pin 12 Should be 1.59VDC...
Page 44 42PW350 3D Sync Troubleshooting Flow Chart Page 3 of 3 Continued from Note: The 3D sync on the LVDS cable is not previous page the same as the 3D_SYNC route shown on the Main board. This is just a TP.
Page 45 DISASSEMBLY SECTION This section of the manual will discuss Disassembly, Layout and Circuit Board Identification, of the 42PW350 Advanced Single Scan Plasma Display Panel. Board Identification, of the 42PW350 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 46 (The Stand does not need to be removed). PAY CLOSE ATTENTION TO THE TYPE SIZE AND LENGTH PAY CLOSE ATTENTION TO THE TYPE, SIZE AND LENGTH Of the screws when replacing the back cover. Improper type can damage the front. June 201 1 42PW350 Plasma...
Page 47 Main Board Heat Sink Side Input (part of AC In Right “X” Left “X” main) IR/LED Soft Touch Invisible Invisible Invisible Invisible Motion Remote and Motion Remote and Board Keypad Speaker Speaker 3D Emitter (RF) June 201 1 42PW350 Plasma...
Page 48 42PW350 Connector Identification Diagram PANEL EAJ61527706 PDP42T30000.ASLGB EAJ61527743 PDP42T30000.ASLGM p/n: EBR68342501 Y-DRIVE Z-SUB Board Board p/n: EBR68288401 SMPS P811 Z-SUS POWER SUPPLY P201 Board Board P206 P101 p/n: EAY62170901 p/n: EBR68342001 Top row Odd P101 P213 Back row Even SC101...
Page 49 The board must be lifted slightly to clear these collars. Behind each board are “Chocolate” (dense rubber t b lift d li htl t B hi d “Ch l t ” (d like material) that act as shock absorbers. They may make the board stick when removing. June 201 1 42PW350 Plasma...
Page 50 Front IR and Key Pad Removal FRONT IR/INTELLIGENT SENSOR and SOFT TOUCH KEY BOARD. Disconnect P100. The board is attached to the Front Glass. KEY PAD: KEY PAD: The Key Pad is part of the Front IR/Soft Touch Key Board. June 201 1 42PW350 Plasma...
Page 51 Disconnect all TCP ribbon cables from the defective X-Drive board and all other Ribbon cables going to that particular board. Remove the 5 screws holding the defective X-Drive board in place. Remove the board. Reassemble in reverse order. Recheck Va / Vs / VScan / -VY / Z-Drive. June 201 1 42PW350 Plasma...
Page 52 With Stand removed Left Ri ht Right Warning: Never run the TV with the TCP Heat Sink removed TCP Heat Sink removed Heat Sink Warning Shorting Hazard: Conductive Tape. Do not allow to touch energized circuits. June 201 1 42PW350 Plasma...
Page 53 (See next page for precautions) Removing Connectors to the TCPs. Gently lift the locking mechanism Gently lift the locking mechanism upward on all TCP connectors Left X: P201~206 Example Right X: P301~306 Cushion (Chocolate) Flexible ribbon cable connector June 201 1 42PW350 Plasma...
Page 54 Note: TCP is usually stuck down to the Chocolate heat transfer material, be Very Careful when material, be Very Careful when lifting up on the TCP ribbon cable. June 201 1 42PW350 Plasma...
Page 55 The Left X Board drives the Right 1/2 of the side of the screen vertical electrodes. Left X Viewing from the Front of the TV. The Right X Board drives the Left 1/2 of the side of the screen vertical electrodes. Viewing from the Front of the TV. June 201 1 42PW350 Plasma...
Page 56 CIRCUIT OPERATION, TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION 42PW350 Plasma Display This Section will cover Circuit Operation, Troubleshooting and Alignment of the Power Supply, Y-SUS Board, Y-Drive Boards, Z-SUS Board, Control Board, Main Board and the X Drive Boards Main Board and the X Drive Boards.
Page 57 42PW350 Signal and Voltage Distribution Block SMPS OUTPUT VOLTAGES IN STBY SMPS TURN ON SEQUENCE STB +5V FPC: Flexible Printed Circuits Display Panel SMPS OUTPUT VOLTAGES IN RUN Step 1: RL_ON: 17V, 5V, AC_Det, Error Det, Horizontal Y Drive STB5V, +5V, 17V to Main Board...
Page 58 (12) Panel Model Name (5) Adjusting Voltage (Set Up / -Vy / Vsc / Ve / Vzb) (13) Max. Watt (Full White) (6) Trade name of LG Electronics (14) Max. Volts (7) Manufactured date (Year & Month) (7) Manufactured date (Year & Month) (15) Max Amps (15) Max.
Page 59 Set-Up encountered All label references are from a specific panel All label references are from a specific panel. 3) When an abnormal picture issues is They are not the same for every panel encountered. encountered June 201 1 42PW350 Plasma...
Page 60 P d t id tif th number. (It may vary in your specific model number, always confirm part number). On the following pages, we will examine the Operation of this Power Supply. June 201 1 42PW350 Plasma...
Page 61 There are 2 adjustments located on the Power Supply Board VA and VS. The Adjustments M5V i M5V is pre-adjusted and fixed. All adjustments are made referenced to Chassis d fi d All dj d t Ch Ground. Use “Full White Raster” 100 IRE VR901 VR502 VR502 June 201 1 42PW350 Plasma...
Page 62 42PW350 SMPS Layout Drawing Example: Model : PDP 42T3### Voltage Setting: 5V/ Va:55/ Vs:200 F301 N.A. / -200 / N.A. / N.A. / 125 D901 4A/250V P811 Supply STBY 160V RUN 390V VS TP D902 P811 Connector SMPS to Z-SUS P7...
Page 63 2.5Amp/250V Source M5V, +5V STBY-5V Source +5V M5V +5V, M5V Controller On Back of RL103 Source the board Controller Main Fuse F101 Bridge To MAIN Rectifier 10Amp/250V P813 AC Input SC 101 SC 101 P702 June 201 1 42PW350 Plasma...
Page 64 (opened), it pulls up and places the Controller (IC701) into the Auto mode. In this state, the Controller turns on the power supply in stages automatically. A load is necessary to perform a good test of the SMPS if the Main board is suspect. June 201 1 42PW350 Plasma...
Page 65 42PW350 Television Turn On Sequence F301 In Stand-By Primary side is 160V (SMPS) F302 In Run (Relay On) Primary side is 390V AC In 5V Generation STBY 5V Regulator Relay STBY 3.46V 5.16V RL On RL On Stand By Error Det.
Page 66 Pin 6 or 7 Vs Adjust: Place voltmeter on VS TP. Adjust VR901 until the reading matches your Panel’s label. Va Adjust: Place voltmeter on VA TP. Adjust VR502 until the reading matches your Panel’s label. June 201 1 42PW350 Plasma...
Page 67 42PW350 Power Supply Static Test with Light Bulb Load Using two 100 Watt light bulbs, attach one end to Vs and the other end to ground. Apply AC to SC101. If the light bulbs turn on and VS is the correct voltage, allow the SMPS to run for several minutes to be sure it will operate under load.
Page 68 M5V, VS and VA lines operational. P811 (VS pins 1 and 2) (VA pins 5) and the (M5V pins 6) P811 (VS pins 1 and 2) (VA pins 5) and the (M5V pins 6). June 201 1 42PW350 Plasma...
Page 69 Note: Pin 18 is grounded on the Main board. If this line is floated, the SMPS turns on Even on bottom row. Automatically when AC is applied. Odd on top row. Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 70 Z-SUS routes Va to the Z-SUS and then to the Bottom X-Right. Vs routed to Y-SUS from P2 on the Z-SUS. M5V routed through Z-SUS to Control board and to Y-SUS.` Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 71 Also Routed to the Y-SUS and to the Control Board. Not used by the Z-SUS but Routed to the Z-SUB and then to the Right X-Board then to the Right X-Board. Y-SUS Supplied Routed through Control Board Developed on Z-SUS Z Bias June 201 1 42PW350 Plasma...
Page 72 Z-SUS board receives VS and Printed Circuits M5V SMPS and 18V from the Control board Receives Logic Signals Display Generates Circuits generate erase, Panel Z Bias 125V sustain waveforms NO IPMs FET Makes Drive waveform X-Board Left X-Board Right June 201 1 42PW350 Plasma...
Page 73 M5V from SMPS to the FETs Y-SUS generates +18V. from M5V and 18V are routed Control Control through the Control board. Logic Signals generated on the Control board. P3 To Z-SUB P3 To Z-SUB June 201 1 42PW350 Plasma...
Page 74 42PW350 Z-SUS Layout Drawing Example: Model : PDP 42T3### Voltage Setting: 5V/ Va:55/ Vs:200 FS2 VA N.A. / -200 / N.A. / N.A. / 125 Z-Bias P2 Connector Z-SUS to Y-SUS P206 10A/125V Label Diode Check Vzbias TP ERROR 102V...
Page 75 TIP: To help lock the scope when capturing the Z-SUS Waveform, us the VS DA TP on the Control Board for an External Clock VS_DA TP on the Control Board for an External Clock. This Waveform is just for reference to observe the effects of Zbz adjustment June 201 1 42PW350 Plasma...
Page 76 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) VR1 in accordance with your Panel’s voltage label. June 201 1 42PW350 Plasma...
Page 77 Z-SUS Board Fuse Identification P/N EBR68342001 VA Fuse 10A / 125V M5V Fuse M5V Fuse 7A / 125V VS Fuse 6.3A / 250V June 201 1 42PW350 Plasma...
Page 78 Diode Check Pin 1 *200V *55V *55V 5.06V 1.03V * Note: Varies according to Panel Label There are no Stand-By voltages on this connector Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 79 5.06V 1.03V Pin 1 * Note: This voltage will vary in accordance with Panel Label There are no Stand-By voltages on this connector Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 80 CTRL_OE VZ CON VZ_CON 3 25V 3.25V Pin 1 ZBIAS 1.92V ZSUSDN 0.79V ZSUSUP 0.22V There are no Stand-By voltages on this connector Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 81 Tip: Disconnect P206 on Y-SUS. Jump Only M5V to the Y-SUS (Not VS). If this brings up the 18V on P101 pins 24~27, then leave P101 connected. There will be no need to jump 17V to the Z-SUS. June 201 1 42PW350 Plasma...
Page 82 Note: There is no VSC or 18V adjustment on this model. Floating Ground FG 5V Used on the Y-Drive board (Measured from Floating Gnd) FG 15V Used in the Development of the Y-Drive Waveform (Measured from Floating Gnd) June 201 1 42PW350 Plasma...
Page 83 Also 18V by same DC/DC Waveform FG5V Left X Board Logic signals needed to scan the panel Y-Drive Board Display Panel Receives Scan Waveform Logic signals needed to generate drive waveform Logic signals needed to generate drive waveform June 201 1 42PW350 Plasma...
Page 84 1~2 Y-SCAN P212 M5V (pins 24-27) for both 3 4 VPP 3~4 VPP 6~12 Scan Data Ribbon P101 Logic Signals from P211 the Control Board FS501 (18V) Logic Signals to Logic Signals to 2A/125V Y-Drive Board June 201 1 42PW350 Plasma...
Page 85 42PW350 Y-SUS Example: Layout Drawing Model : PDP 42T3### P206 Voltage Setting: 5V/ Va:55/ Vs:200 N.A. / -200 / N.A. / N.A. / 125 TIP: There are Chocolate pieces between the You can run FG supplies and 18V Y-SUS and the Panel. Be sure to return Remove All Connectors.
Page 86 Location: Bottom Center of board Just Left of Transformer T501 -Vy TP R201 VR502 -VY ADJ Voltages Reads Positive Location: Bottom Center of board Just above Transformer T501 Note: There is no VSC adjustment in this model. June 201 1 42PW350 Plasma...
Page 87 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. June 201 1 42PW350 Plasma...
Page 88 SET-UP can be made using VR601 and the SET-DN can be made using VR401. Blanking It will make this adjustment easier if you use the “Expanded” mode of your scope Expanded mode of your scope. Area for Set-Dn adjustment 195 uSec June 201 1 42PW350 Plasma...
Page 89 TIP: To help lock the scope when capturing the ADJUSTMENT LOCATION: Y SUS W Y-SUS Waveform, us the VS_DA TP on the Control th VS DA TP th C Bottom Right Board for an External Clock. Just above P101 June 201 1 42PW350 Plasma...
Page 90 Set Up swing is Minimum 146V Max 204V p/p Back Porch Normal 155V Too Low 146V Too Short 146uSec Normal Normal 195uSec Back Porch Too High 206uSec 204V 200V off th Fl the Floor Normal 155V Floor June 201 1 42PW350 Plasma...
Page 91 Y Drive board. The Y SUS (Y Scan) signal can be tested on the left leg of C213 if the Y-Drive board is defective and has to be removed. (Check for 470V p/p) C213 Left Leg Y-SCAN June 201 1 42PW350 Plasma...
Page 92 P213 Y-SUS Board Connector to P101 Y-Drive (Floating Ground) P213 P101 All pins are Floating Ground. Y-Drive Y-SUS Board Board June 201 1 42PW350 Plasma...
Page 93 Note: Pin 1 is at the top. P211 FG5V (4.9V) measured from Pins 11 or 12 to Floating Gnd. Floating For Floating Ground, use any pin on P213. Ground 5V TP d 5V TP P102 P102 June 201 1 42PW350 Plasma...
Page 94 Gnd to Floating Gnd TP DATA DATA without an Isolation Transformer. l ti All logic pins about (420V p/p) SUS_DN (FG) Y-Drive Y-Drive Y-SUS Y-SUS Board Board Pins 7~11 are Logic (Drive) Signals to the Y-Drive Upper. P106 June 201 1 42PW350 Plasma...
Page 95 Black Lead on FG (Floating Gnd) Diode Mode Readings taken with all connectors Disconnected. Y-Drive Board should be DISCONNECTED DVM in Diode Mode DVM in Diode Mode. for the Diode Mode test. th Di d M d t June 201 1 42PW350 Plasma...
Page 96 Source FG5V (Floating Ground 5V) FG15V Must be grounded to test FG5, FG15V is regulated down to 5V by IC508. l t d d t 5V b IC508 and 18V with only 5V applied to board. June 201 1 42PW350 Plasma...
Page 97 Diode Check with Board Connected. Diode Check with Board Disconnected. 0.85V Black lead on Chassis Ground. 0.5V Red Lead on Chassis Gnd 1 13V Black Lead on Chassis Gnd 1.13V Black Lead on Chassis Gnd June 201 1 42PW350 Plasma...
Page 98 P206 Y-SUS to Z-SUS P2 Label Diode Check ER_PASS 98V~102V P206 *200V 9~11 5.06V 1.15V * Note: These voltages will vary in accordance with Panel Label Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 99 1.35V DATA_PRE 0.01V SUS_UP_0 0.75V ER UP ER_UP 0 3V 0.3V CTRL OE CTRL_OE 0 11V 0.11V SC_A 1.45V RAMP_DN 2.17V RAMP_UP 0.22V Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 100 (Y (Y- - Drive Explained) Drive Explained) p/n: EBR68288401 Y-DRIVE BOARD The 42PW350 uses 8 Driver ICs on one Y-Drive Board commonly called “Y-Drive Buffers” but are actually Gate Arrays. Y-Drive Board works as a path supplying the Sustain and Reset waveforms which are made in the Y-Sustain board and sent to the Panel through Scan Driver IC’s.
Page 101 Floating Gnd 5V can be measured across C18 or Pins 10~9 VPP Pins 10 9 VPP C523 C523 surface mount electrolytic capacitors or t l ti Pins 1~6 Logic (Scan Fuse FL1 next to P102. Control signals June 201 1 42PW350 Plasma...
Page 102 OL with Red Lead on Scan 0.53V with Black Lead on Scan Any Output Buffer TP Y-Scan OL with Red Lead on Scan OL with Red Lead on Scan 0.80V with Black Lead on Scan June 201 1 42PW350 Plasma...
Page 103 BLACK LEAD On RED LEAD On “ANY” Floating Ground Output Lug Reads Open Indicated by white outline Any of these output lugs can be checked from floating ground. Look for shorts indicating a defective Buffer IC June 201 1 42PW350 Plasma...
Page 104 To reinstall the Ribbon Cable, 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). June 201 1 42PW350 Plasma...
Page 105 Ribbon cable was improperly seated at the top. This can cause bars, lines, intermittent lines t li abnormalities in the picture. Remove the ribbon cable and re seat it correctly Remove the ribbon cable and re-seat it correctly. June 201 1 42PW350 Plasma...
Page 106 P101 Y-Drive to Y-SUS P213 (Floating Ground) P213 P101 All pins are Floating Ground. Y-Drive Y-SUS Board Board June 201 1 42PW350 Plasma...
Page 107 Floating Ground Note: Pin 1 is at the bottom. P211 FG5V (4.9V) measured from Pins 1 or 2 to Floating Gnd. For Floating Ground, use any pin on P101. P102 P102 Floating Ground 5V TP June 201 1 42PW350 Plasma...
Page 108 DO NOT hook scope Gnd to Floating Gnd TP without an Isolation Transformer. All logic pins about (420V p/p) SUS_DN (FG) Y-Drive Y-SUS Board Board Pins 1~7 are Logic (Drive) Signals to the Y-Drive Upper. P106 June 201 1 42PW350 Plasma...
Page 109 Y Drive Board Board Diode Mode Readings taken with all connectors Disconnected. Y-SUS Board should be DISCONNECTED DVM in Diode Mode DVM in Diode Mode. for the Diode Mode test. th Di d M d t June 201 1 42PW350 Plasma...
Page 110 Diode Check with Board Disconnected. 1 33V Black lead on Floating Ground 1.33V Black lead on Floating Ground. 0 53V Red Lead on Floating Gnd 0.53V Red Lead on Floating Gnd OL Black Lead on Floating Gnd 1 10 June 201 1 42PW350 Plasma...
Page 111 (Not used by the Control Board) Developed on the Control Board +1.0V (IC703) for internal use 1.0V (IC703) for internal use +1.8V (IC701) for internal use +3.3V (IC53) for internal use and for the X-Boards (TCPs) 1 1 1 June 201 1 42PW350 Plasma...
Page 112 P106 P106 For External Trigger l T i IC22 IC22 Serial Flash Pattern Generator For Panel Test IC702 IC53 IC53 From IC53 3.3V P107 P108 n/c (For ROM Updates) To X-Left To X-Right 1 12 June 201 1 42PW350 Plasma...
Page 113 42PW350 Control Board Layout Drawing With the unit on, if D1 is not on, check 5V supply. Note: In this set M5V is routed from the SMPS (P811 pin 6) to the Z-SUS (P205), from the Z-SUS to the Y-SUS, from the Y-SUS to the Control board, from Control to Z- SUS, Pins 4~7 of P101.
Page 114 Behind Control Board IC103 (Temperature Sensor) IC103 Pin 1 Pin 1 IC103 CONTROL BOARD TEMPERATURE SENSOR LOCATION 04) 3.3V 03) Gnd 05) Gnd 02) Gnd BACK SIDE OF THE BOARD 06) 3.3V 01) 3.3V 1 14 June 201 1 42PW350 Plasma...
Page 115 LVDS video signals. Note, this TP (VS DA) can be (VS_DA) can be used as an External Trigger for scope when locking onto the Y-Drive (Scan) or the Z-Drive signal. 1 15 June 201 1 42PW350 Plasma...
Page 116 The frequency of the sine wave is 25 MHZ. Mi i Missing this clock signal will halt operation of the panel l ill h lt f th drive signals. 1.61V 1.69V CONTROL Osc. Check: 25Mhz Bottom Leg BOARD CRYSTAL LOCATION 1 16 June 201 1 42PW350 Plasma...
Page 117 43072 Vertical Electrodes To Left To Right per TCP X-Board X-Board 43072 (RGB) / 3 = 128 Lines per Buffer To 6 TCPs To 6 TCPs 1024 Total Pixels (H) 256 Lines output Total 1 17 June 201 1 42PW350 Plasma...
Page 118 Y-SUS to the Y-Drive boards). Note: The +18V is not used by the Control board, it is routed to the Z-SUS leaving on P2 Pins 13~15. The M5V also leaves on P2 Pins 11~12. 1 18 June 201 1 42PW350 Plasma...
Page 119 0.3V CTRL_OE 0.11V SC A SC_A 1 45V 1.45V RAMP DN RAMP_DN 2 17V 2.17V RAMP_UP 0.22V Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. 1 19 June 201 1 42PW350 Plasma...
Page 120 Example of Normal Signals measured at 1V p/p at 10µSec Pins 12~17 22~25 28~33 38~41 are LVDS Video Signals Pins 12 17, 22 25, 28 33, 38 41 are LVDS Video Signals. Pins 19~20 and 35~36 are clock signals for the data. June 201 1 42PW350 Plasma...
Page 121 Pin 5: Enables the Control Board test patterns (Panel Test). Bold Pins indicate 20 bit differential video signal Bold Pins indicate 20 bit differential video signal Note: There are no voltages in Stand-By mode. June 201 1 42PW350 Plasma...
Page 122 Label Label ZBIAS 1.92V Vzbias-con 3.25V CTRL_EN Y-OE 0.05V 11~12 5.06V 1.15V 13~15 13~15 (+15V) (+15V) 18 2V 18.2V Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 123 1.32V STB (0) 3.25V PDDS_CLK_P7 1.09V 1.34V STB (1) 3.25V PDDS_CLK_N7 1.35V 1.32V BLK (0) 1.76V POL (0) 1.89V PDDS_A2_P14 1.11V 1.34V X_ER_DN(0) 0.28V PDDS_A2_N14 1.32V 1.32V X_SUS_DN(0) 0.28V PDDS_A1_P14 1.11V 1.34V PDDS_A1_N14 1.32V 1.32V June 201 1 42PW350 Plasma...
Page 124 1.09V 1.34V PDDS_CLK_P11 1.09V 1.34V PDDS_A1_N18 1.32V 1.32V PDDS_A1_N22 1.32V 1.32V PDDS_A1_P18 1.11V 1.34V PDDS_A1_P22 1.11V 1.34V PDDS_A2_N18 1.32V 1.32V PDDS_A2_N22 1.32V 1.32V PDDS_A2_P18 1.11V 1.34V PDDS_A2_P22 1.11V 1.34V PDDS_A1_N19 1.32V 1.32V PDDS_A1_P19 1.11V 1.34V June 201 1 42PW350 Plasma...
Page 125 41~43 and routes to the Left X-Board via ribbon connector P232 pins 9~11. • 3.3V: Control board develops 3.3V (IC53). 3.3V leaves on connector P108 pins 8~10 and routes to the Left X-Board via ribbon connector P331 pins 42~44. June 201 1 42PW350 Plasma...
Page 126 • There are a total of 12 TCPs and each TCP has 2 gate arrays, so there are a total of 24 buffers feeding the panel’s 5760 vertical electrodes which determine the Horizontal Resolution of the Panel determine the Horizontal Resolution of the Panel. June 201 1 42PW350 Plasma...
Page 127 NEVER run the television with this heat sink removed. Damage to the TCPs will occur and cause a defective panel. The Vertical Address buffers (TCPs) Taped Carrier Packages have one heat sink indicated by the arrow. It protects all 12 TCPs. June 201 1 42PW350 Plasma...
Page 128 P311 P311 This shows the routing for VA and for the 3.3V input to the X-Drive boards. Using a regular diode check: Using a regular diode check: VA should be (OL) 3.3V should be (0.53V) June 201 1 42PW350 Plasma...
Page 129 On 3.3V (1.22V) TCPs connected. On any Va (OL) TCPs disconnected. On any Va (OL) TCPs disconnected. On EC (OL) TCPs disconnected. On EC (OL) TCPs disconnected. On 3.3V (OL) TCPs disconnected. On 3.3V (OL) TCPs disconnected. June 201 1 42PW350 Plasma...
Page 130 Cap, you can use for Test Points. Example here from P305. You can only check for continuity back to IC231 you check for continuity back to IC231, you can not run the set with heat sink removed. June 201 1 42PW350 Plasma...
Page 131 Y-SUB Board Logic Control Board Connector 3.3V Lock Chocolate 256 total lines 128 lines Taped Carrier 128 lines Package 256 Vertical Electrodes Long Black Attached directly Heat Sink to Flexible cable Back side of TCP Ribbon June 201 1 42PW350 Plasma...
Page 132 Red Lead on TCP 3.3V OL Black Lead on TCP 3.3V 0.32V Black Lead on TCP 3.3V 0.53V Logic EC (OL) either way EC OL either way EC OL either way 10 15 25 30 40 45 June 201 1 42PW350 Plasma...
Page 133 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. “TCP” Tapped Carrier Package Look for burns, pin holes, damage, etc. June 201 1 42PW350 Plasma...
Page 134 * Note: This voltage will vary in accordance with Panel Label. There are no Stand-By voltages on this connector. Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 135 1.32V 1.8V PDDS_A2_N11 1.32V 1.8V PDDS_A2_P15 1.11V 1.8V PDDS_A2_P11 1.11V 1.8V PDDS_A1_N14 1.32V 1.8V PDDS_A1_P14 1.11V 1.8V Diode Mode Readings taken with all connectors Disconnected except TCPs. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 136 * Note: This voltage will vary in accordance with Panel Label. There are no Stand-By voltages on this connector. Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 137 * Note: This voltage will vary in accordance with Panel Label. There are no Stand-By voltages on this connector. Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 138 1.11V 1.8V X_SUS_DN(1) 0.28V 1.87V PDDS_A2_N19 1.32V 1.8V X_ER_DN(1) 0.28V 1.87V PDDS_A1_P19 1.11V 1.8V PDDS_A1_N19 1.32V 1.8V Diode Mode Readings taken with all connectors Disconnected except TCPs. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 139 • Processes and Outputs all audio signals and sends them to the Invisible Speakers • Routes Optical Audio Out. • Receives and Transmits to the Motion Remote via RF. • Transmits 3D Sync to the 3D Shutter Glasses • Transmits 3D Sync to the 3D Shutter Glasses. June 201 1 42PW350 Plasma...
Page 140 3D Formatter SMPS P1401 LVDS LVDS IC101 P902 Microprocessor Microprocessor t Ft IR to Ft IR Video Processor P1404 Motion Remote / 3D Transmitter Optical HDMI Audio HDMI Audio Remote P700 Audio Composite RS232 Rear Inputs June 201 1 42PW350 Plasma...
Page 141 42PW350 Main (Front and Back) Layout Drawing P501 "Main" to P813 "SMPS" Label STBY Diode Check Open Q1400 Serial Flash 5.1V 0.46V 5.17V 1.18V 3D Formatter X1400 IC1402 Error_Det 3.44V 4.02V 1.73V 24Mhz Serial Flash P501 9-12 IC1400 Other Main Boards...
Page 142 42PW350 Main (Front) Layout Drawing Q1400 X1400 Serial Flash WP 24Mhz P501 IC1400 IC1404 +1.0V IC1407 3D Formatter +5V in L1402 IC1401 IC1406 P1401 +3.3V Reg 1 2 3 +3.3V_3D Reg +1.8V +5V in (3) Q1402 +3.3V_3D_A In (3) SDA_3.3V_MOD +5V_ST_EN In SCL_3.3V_MOD...
Page 143 42PW350 Main Board Front Side Component Voltages IC103 Serial IC502 +1.26V_VDDC IC507 +5V_TU IC1404 +1.0V Q501 +5V_ST_EN Flash Regulator Regulator Regulator Switch Pin For HDMI [1] 5V (In) [1] 11.1V [1] 5V (In) [B] 0.7V [1] Gnd [2] 5V (In)
Page 144 42PW350 Main Back Layout Drawing IC1402 Serial Flash MAIN BOARD p/n: EBT61267425 AUSLLJR Other Main Boards p/n: EBR72942901 AUSLLHR p/n: EBR71638619 Interchangeable IC500 Q500 IC109 IC102 3.3V_ST Q501 CTL 5V_ST in (3) EEPROM HDCP EEPROM +5V in IC505 USB +5V OCP...
Page 145 42PW350 Main Board Back Side Component Voltages IC102 HDCP IC505 +2.5V_AVDD IC900 RS232 Tx/Rx IC1101 USB 5V Q800 HDMI CEC Q1305 Tuner EEPROM Regulator Limiter Buffer CVBS [1] 3.3V (In) [1] 3.3V [1] Gnd [1 B] 3.29V [B] 3.63V [1] Gnd [2] Gnd [2] 5.6V...
Page 146 Data only present during channel 7. SDA change on SDA/SCL. approx:. 4V p/p. 6. SCL 5. NC 4. NC 4. NC 3. 5V_TU 2. NC 1. NC Front bottom right hand side Front bottom right hand side June 201 1 42PW350 Plasma...
Page 147 X200 Runs when power applied. li d X200 25MHZ (Micro Crystal) X1400 X200 X200 1.66V 1.67V Top Side 3.38V p/p Top Side 3.38V p/p Bottom Side 3.0V p/p Bottom Side 3.0V p/p MAIN Board Crystal Location June 201 1 42PW350 Plasma...
Page 148 If the Connector Locks have been damaged and will not release, cut off tabs. Use a thin object and slide straight down as indicated by the arrows below and release the locks. June 201 1 42PW350 Plasma...
Page 149 Note: If the AC Det line is Missing, Audio will Mute. e Note: Pin 18 is grounded on the Main. If opened, the power supply turns on automatically. Diode Mode Check with the Board Disconnected. DVM in the Diode mode. June 201 1 42PW350 Plasma...
Page 150 3 3V Low Voltage Signal Processing: Pins 21 35 3.3V Low Voltage Signal Processing: Pins 21, 35. Audio Mute: Pins 23, control is AC_DET. P700 Speaker Connector Diode Mode Check with the Board Disconnected. DVM in the Diode mode. June 201 1 42PW350 Plasma...
Page 151 3.3V 3.3V 1.72V Sensor EYE_SDA 3.3V 3.3V 1.72V 3.3VST 3.3V 3.3V 0.85V Stand-By 3.3V Touch_Ver_Check 0.19V 1.69V Open Soft Touch Open Sensitivity Setting Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 152 P106 connector. Use the table on the left. Disp_En Note3: Use the VS DA Test Point and Note3: Use the VS_DA Test Point and external trigger to help lock the scope onto the video waveforms. June 201 1 42PW350 Plasma...
Page 153 1.19V 1.37V PC_SER_DATA 3.31V PC_SER_CLK 3.31V * Pin 50 0V (No 3D) 1.65V (With 3D) Pins in Bold are Video pins (20 Total) Diode Mode Check with the Board Disconnected. DVM in the Diode mode. June 201 1 42PW350 Plasma...
Page 154 Note: Pin 12 with 3D Sync 3.48V p/p 60 Hz square wave. RF Freq GPIO 0 (9) GPIO 1 (10) GPIO 2 (11) 3D Disable 60Hz 59.94Hz Diode Mode Check with the Board Disconnected. DVM in the Diode mode. June 201 1 42PW350 Plasma...
Page 155 (IC101) via Clock and Data lines out P100 to P902 pins 7 and 8. The IR signal is routed back to the Main Board via pin 1. Also, the Soft Touch Key Pad is routed through out P100 to P902 pins 3 and 4. June 201 1 42PW350 Plasma...
Page 156 P100 To Main Board To gain access to the Front IR board, as viewed from the bottom of the TV, remove to two screws that hold the Front Right Speaker and pull the speaker out. Screw Screw June 201 1 42PW350 Plasma...
Page 157 For Readings when any Key is touched, see Soft Key Pad Section For Key 1 and Key 2. For Key 1 and Key 2. Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 158 P100 Connector “FT IR Board“ to P902 “Main” (No Key Pressed) Diode Mode Label STBY Diode Mode Readings taken with all connectors KEY 1 3.29V 3.29V 2.58V Disconnected. Black lead on Gnd. DVM KEY 2 3.29V 3.29V 1.58V in Diode Mode. June 201 1 42PW350 Plasma...
Page 159 How to Re-register the Magic Motion Remote Control after Registration Failure. Reset the remote control by pressing and holding both the ENTER and MUTE buttons for 5 seconds. An LED will blink 3 times indicating the remote is ready for registering. Motion Remote “Magic Remote” AKB73295502 June 201 1 42PW350 Plasma...
Page 160 This voltage is generated on the Main Board (IC505) • 3 3V MULTI generated on the Main Board (IC402) • 3.3V_MULTI generated on the Main Board (IC402). No Connector Number Silk Screened on board p/n: EBR72499601 June 201 1 42PW350 Plasma...
Page 161 Motion Remote Receiver Board Close Up p/n: EBR72499601 Rear View No Connector No. RF Transmitter Receiver Front View June 201 1 42PW350 Plasma...
Page 162 *Pin 10/12 voltages without 3D / with 3D Freq GPIO 0 GPIO 1 GPIO 2 3D Disable 60Hz 59.94Hz Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. June 201 1 42PW350 Plasma...
Page 163 The Full Range Speakers point downward, so there are no front viewable speaker grills or air ports. Installed Bottom View Anti Rattle Anti Rattle Remove two screws Reading across from the bottom speaker wires, 8.2 ohm. Rear View Front View Speaker Speaker Connection June 201 1 42PW350 Plasma...
Page 164 Use the Adobe version to zoom in for easier reading Use the Adobe version to zoom in for easier reading. When Printing the Interconnect diagram, print from the Ad b Adobe version and print onto 11X17 size paper for best t 11X17 i results. June 201 1 42PW350 Plasma...
Page 165 42PW350 (42T3 Panel) CIRCUIT INTERCONNECT DIAGRAM Z-SUS Signal VR601 P813 "SMPS" to P500 "Main" 155V ± 5V Label STBY No Load Diode Set-up P2 "Z-SUS" to "Y-SUS" P206 Connect Scope P811 "Power Supply" to P7 "Z-SUS" 4.86V Open between Waveform...
Page 166 42PW350 Main Board (Front Side) Component Voltages IC103 Serial IC502 +1.26V_VDDC IC507 +5V_TU IC1404 +1.0V Q501 +5V_ST_EN Flash Regulator Regulator Pin Regulator Switch Pin For HDMI [1] 5V (In) [1] 11.1V [1] 5V (In) [B] 0.7V [1] Gnd [2] 5V (In)
Page 167 End of the 42PW350 Presentation This concludes the 42PW350 Presentation 09/06/2011 Update Page 1: Corrected Front Cover page: 1080P changed to 720P. Pages 10 and 11: Dropped Wireless Ready information. Pages 21~28: Added Power Off Status information. Page 29: Added EDID D/L information...

LG 42PW350 Training Manual

Quick Links

Related Manuals for LG 42PW350

Summary of Contents for LG 42PW350

Page 23: Table Of Contents

Page 24: Power_Off_By_Sw_Dl