LG 42PJ350 Training Manual
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LG 42PJ350 Training Manual

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See also: Service Manual , Owner's Manual
Training Manual
42PJ350 Plasma Display
42PJ350 Plasma Display
Advanced Single Scan Troubleshooting
42" Class HD 720p Plasma TV
(41.6" diagonally)
Published August 12
, 2010
th

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Summary of Contents for LG 42PJ350

  • Page 1 Training Manual 42PJ350 Plasma Display 42PJ350 Plasma Display Advanced Single Scan Troubleshooting 42" Class HD 720p Plasma TV (41.6" diagonally) Published August 12 , 2010...

  • Page 2: Overview Of Topics To Be Discussed

    • Z-SUS Output Board (Also uses one Z-SUB board for bottom panel connector) • Control Board • X Drive Boards (2) • Main Board • Interconnect Diagram: 11X17 Foldout Section used as a quick reference sheet. August 2010 42PJ350 Plasma...
  • Page 3 Overview of Topics to be Discussed Overview of Topics to be Discussed 42PJ350 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: Lg Contact Information

    LCD-DV: 32LG40, 32LH30, 37LH55, 42LG60, 42LG70, 42LH20, 42LH40, 42LH50, 42LH90, 42SL80, 47LG90, 47LH85, 47LE8500 PLASMA: 42PG20, 42PQ20, 42PQ30, 50PG20, 42PJ350, 50PK750, 50PS80, 50PS60, 60PK750, 60PS11, 60PS60, 60PS80 Also available on the Plasma Page: New Training Materials on New Training Materials on...

  • Page 5: Important Safety Notice

    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.

  • Page 6: Esd Notice

    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. August 2010 42PJ350 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. August 2010 42PJ350 Plasma...

  • Page 8: Basic Troubleshooting Steps

    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. August 2010 42PJ350 Plasma...

  • Page 9: 42Pj350 Product Information Section

    42PJ350 PRODUCT INFORMATION SECTION 42PJ350 PRODUCT INFORMATION SECTION This section of the manual will discuss the specifications of the 42PJ350 Advanced Single Scan Plasma Display Television. August 2010 42PJ350 Plasma...
  • Page 10 42PJ350 Specifications 42PJ350 Specifications 1080P PLASMA HDTV 42" Class (41.6" diagonal) • 600Hz Sub Field Driving • High Definition Resolution • 3M:1 Dynamic Contrast Ratio For Full Specifications See the Specification Sheet • TruSlim Frame • Picture Wizard II (Easy Picture Calibration) •...
  • Page 11 42PJ350 Logo Familiarization Page 1 of 3 42PJ350 Logo Familiarization Page 1 of 3 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 12 42PJ350 Logo Familiarization Page 2 of 3 42PJ350 Logo Familiarization Page 2 of 3 HD RESOLUTION 720P HD Resolution Pixels: 1365 (H) × 768 (V) See and experience more. Pictures are sharper. Colors are more vibrant. Entertainment is more real.
  • Page 13 42PJ350 Logo Familiarization Page 3 of 3 42PJ350 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: 600Hz Sub Field Driving

    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. August 2010 42PJ350 Plasma...

  • Page 15: 42Pj350 Remote Control

    42PJ350 Remote Control 42PJ350 Remote Control BOTTOM PORTION p/n AKB72914201 TOP PORTION August 2010 42PJ350 Plasma...
  • Page 16 42PJ350 Rear and Side Input Jacks 42PJ350 Rear and Side Input Jacks USB for Music, Photos AC In and Software Upgrades SIDE INPUTS REAR INPUTS HDMI 3 Composite Video/Audio August 2010 42PJ350 Plasma...
  • Page 17 42PJ350 Dimensions Power: There must be at least 4 inches of Clearance on all sides 2-3/16" 285W (Typical) 55.88mm 38-7/8" 0.2W (Stand-By) 955.06mm 4-9/16” 116mm 15-3/4" 11-7/16” 400mm 290mm 27-1/8" Model No. 688.34mm 15-3/4" Serial No. 400mm Label 24-5/6" 617.22mm...

  • Page 18: Disassembly Section

    DISASSEMBLY SECTION This section of the manual will discuss Disassembly, Layout and Circuit Board Identification, of the 42PJ350 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 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. August 2010 42PJ350 Plasma...

  • Page 20: Circuit Board Layout

    Panel Voltage and Panel ID Label Z-SUS Power Supply (SMPS) Y-SUS Z-SUB Main Board Control AC In Side Heat Sink Input Conductive Tape (part of main) Left “X” Right “X” Conductive Tape Conductive Tape IR/LED Soft Touch Invisible Speakers Board Keyboard August 2010 42PJ350 Plasma...
  • Page 21 42PJ350 Connector Identification Diagram 42PJ350 Connector Identification Diagram PANEL p/n: EAJ60716204 (PDP42T10000.ADLGB) p/n: EAJ60716215 (PDP42T10000.ADLGB) Y-DRIVE Board p/n: EBR63633601 Z-SUS Board P811 P206 SMPS p/n: EBR63038801 P201 POWER SUPPLY Board Top row Odd Back row Even Y-SUS p/n: EAY60912401 SC101...
  • Page 22 Note: Y-SUS, Z-SUS and Y-Drive boards are mounted on board stand-offs that have a small collar. The board must be lifted slightly to clear these collars. Behind each board are “Chocolate” (dense rubber like material) that act as shock absorbers. They may make the board stick when removing. August 2010 42PJ350 Plasma...
  • Page 23 Remove the Board by lifting up on the top tabs, lift the board and remove. KEY PAD: The Key Pad is a thin strip of static sensitive material attached to the front glass. It is not removable. August 2010 42PJ350 Plasma...
  • Page 24 Remove the (3 Left or Right X) or (5 Center X) screws holding the defective X-Drive board in place. Remove the board. Reassemble in reverse order. Recheck Va / Vs / VScan / -VY / Z-Drive. August 2010 42PJ350 Plasma...
  • Page 25 Getting to the X Circuit Boards With Stand removed Left Right Warning: Never run the TV with the TCP Heat Sink removed Ground Wire Heat Sink Warning Shorting Hazard: Conductive Tape. Do not allow to touch energized circuits. August 2010 42PJ350 Plasma...

  • Page 26: Left And Right X Drive Connector Removal

    It may stick, be careful not to crack TCP. (See next page for precautions) Removing Connectors to the TCPs. 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 August 2010 42PJ350 Plasma...
  • Page 27 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 cable. August 2010 42PJ350 Plasma...

  • Page 28: Left And Right X Drive Removal

    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 August 2010 42PJ350 Plasma...

  • Page 29: Circuit Operation, Troubleshooting And Circuit Alignment Section

    CIRCUIT OPERATION, TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION CIRCUIT OPERATION, TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION 42PJ350 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.
  • Page 30 42PJ350 Signal and Voltage Distribution Block SMPS OUTPUT VOLTAGES IN STBY SMPS TURN ON SEQUENCE STB +5V Display Panel SMPS OUTPUT VOLTAGES IN RUN 5VFG (5V) measured Step 1: RL_ON: 17V, 5V, AC_Det, Error Det, Horizontal from Floating Ground Y Drive...
  • Page 31 (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) (15) Max. Amps...

  • Page 32: Adjustment Notice

    “Rear View” 2) When a “Mal-Discharge” problem is ZBias Set-Up encountered 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 August 2010 42PJ350 Plasma...

  • Page 33: Switch Mode Power Supply Section

    Check the silk screen label on the top center of the Power Supply board to identify the correct part number. (It may vary in your specific model number). On the following pages, we will examine the Operation of this Power Supply. August 2010 42PJ350 Plasma...
  • Page 34 There are 2 adjustments located on the Power Supply Board VA and VS. The Adjustments M5V is pre-adjusted and fixed. All adjustments are made referenced to Chassis Ground. Use “Full White Raster” 100 IRE VR901 VR502 August 2010 42PJ350 Plasma...
  • Page 35 42PJ350 SMPS Layout Drawing 42PJ350 SMPS Layout Drawing D904 Grayed out components are on the back side of the board. Q902 VR901 F801 D801 Q901 4A 250V T901 Q801 2.6V STBY 390V Run Q504 VR502 D807 Q501 D802 Q802 POWER SUPPLY...
  • Page 36 Fuse F302 160V Stby Primary 389V Run Source Source 2.5Amp/250V STBY-5V Source Source RL104 RL103 Bridge Controller Rectifier Controller STBY-5V On Back of the board Source To MAIN P813 Main Fuse F101 AC Input SC 101 August 2010 42PJ350 Plasma...

  • Page 37: Power Supply Basic Operation

    (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. August 2010 42PJ350 Plasma...

  • Page 38: Power Supply

    42PJ350 Television Start Up Sequence 42PJ350 Television Start Up Sequence In Stand-By Primary side is 160V F302 In Run (Relay On) Primary side is 389V POWER SUPPLY F801 Stand-By 2.6V AC In (SMPS) Run 390V Stand Regulator By 5V Reg STBY 3.46V...
  • Page 39 Pin 1 or 2 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. August 2010 42PJ350 Plasma...
  • Page 40 42PJ350 Power Supply Static Test with Light Bulb Load 42PJ350 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 41: Power Supply Static Test (Forcing On The Smps In Stages)

    (C) Add a 100Ω ¼ watt resistor from any 5V line to M_ON (Monitor On) to make the M5V, VS and VA lines operational. P811 (VS pins 1 and 2) (VA pins 6 and 7) and the (M5V pins 9 and 10). August 2010 42PJ350 Plasma...

  • Page 42: Smps Connector P813 Identification, Voltages And Diode Check

    Note: If the AC Det line is Missing, the TV will shut off after 10 seconds of operation. Note: Pin 18 is grounded on the Main board. If this line is floated, the SMPS turns on Automatically when AC is applied. Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...
  • Page 43 * Note: This voltage will vary in accordance with Panel Label Y-SUS routes Va to bottom X-Left. Vs routed to Z-SUS from P206. M5V routed through Y-SUS to Control board and then to Z-SUS. Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...

  • Page 44: Y - Sus Board Section

    Used internally to develop the Y-Drive signal. (Also routed to the Control Board then routed to the Z-SUS board). 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) August 2010 42PJ350 Plasma...

  • Page 45: Y - Sus Block Diagram

    Generates Floating Ground Left X Board 5V/15V by DC/DC Converters FETs amplify Y-Sustain Waveform FG5V Logic signals needed to scan the panel Y-Drive Board Display Panel Receives Scan Waveform Logic signals needed to generate drive waveform August 2010 42PJ350 Plasma...

  • Page 46: Y - Sus Board Layout

    Control for Z-SUS M5V (pins 4-7) for both Floating Gnd VR501 Ribbon P101 Logic Signals from P211 To Y-Drive the Control Board P209 Logic Signals to VR502 Y-Drive Board Va to Left X Board Pins 5~7 August 2010 42PJ350 Plasma...

  • Page 47: Layout Drawing

    42PJ350 Y-SUS 42PJ350 Y-SUS P206 Connector Y-SUS to Z-SUS P2 Diode Layout Drawing Layout Drawing Label Check P206 *206V Open Y-SUS BOARD Example: IC703 p/n: EBR63038301 ER_PASS 133V Open Model : PDP 42T1### Voltage Setting: 5V/ Va:60/ Vs:205 9~12 N.A. / -195 / 145 / N.A. / 110...

  • Page 48: Vsc And - Vy Adjustments

    2) Adjust VSC VR501 to Panel’s Label voltage (+/- 1V) -Vy TP Location: Bottom Left of the board VSC TP VR501 VSC Adj VR502 Voltages Reads -Vy Adj Positive Location: Bottom Center of board Just above Transformer August 2010 42PJ350 Plasma...

  • Page 49: Y - Drive Signal Overview

    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 100uSec to the panel are OK to use. August 2010 42PJ350 Plasma...

  • Page 50: Locking On To The Y - 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. August 2010 42PJ350 Plasma...
  • Page 51 155V SET-UP can be made using VR601 and the SET-DN can be made using VR401. It will make this adjustment easier if you use the Area for Set-Dn “Expanded” mode of your scope. adjustment 170 uSec August 2010 42PJ350 Plasma...
  • Page 52 (155V p/p ± 5V) SET-DN ADJUST: 2) Adjust VR401 and set the (B) time of the signal to match the waveform above. (170uSec ± 5uSec) ADJUSTMENT LOCATION: Lower Center Right of the board. August 2010 42PJ350 Plasma...

  • Page 53: Set Up Or Down Adjustment Extremes

    Set Up or Down Adjustment Extremes Set Dn swing is Minimum 138uSec Max 186uSec Set Up swing is Minimum 146V Max 204V p/p Normal Normal 170uSec 155V Too Low 146V Too Short 116uSec Too Low 204V 118V off Floor the Floor August 2010 42PJ350 Plasma...
  • Page 54 Warning: Never run the Y-SUS with P211 (Y-SUS) or P106 (Y-Drive) removed unless the Y-Drive board is removed completely. Board Failures will occur. C213 Scan TIP: You can also use C213 left leg to test for V-Scan signal when the Y-Drive board is removed August 2010 42PJ350 Plasma...
  • Page 55 FG5V (4.9V) measured from Pins 15 or 16 to Floating Gnd. For Floating Ground, use any screw on the far left hand side of the Y-SUS board except the one just above P211, this is the Y-Scan output. Y-SUS Y-Drive Board Board August 2010 42PJ350 Plasma...
  • Page 56 DO NOT hook scope Gnd to Floating Gnd TP DATA without an Isolation Transformer. All logic pins about (420V p/p) SUS_DN (FG) Pins 3~12 are Logic (Drive) Signals to the Y-Drive Upper. Y-SUS Y-Drive Board Board August 2010 42PJ350 Plasma...

  • Page 57: Y - Sus P211 Connector Diode Mode Testing

    1.46V 0.68V SUS_DN (FG) Chassis Red Lead Black Lead Y-SUS Ground Y-Drive Board Board Diode Mode Readings taken with all connectors Disconnected. Y-Drive Board should be disconnected DVM in Diode Mode. for the Diode Mode test. August 2010 42PJ350 Plasma...

  • Page 58: Y - Sus Floating Ground (Fg 15V) And (Fg 5V) Checks

    C519 (+ Side) FG15V Source 23.6V D506 18.24V T502 FG 15V Location J393 C520 (+ Side) FG5V Source 10.9V Source FG5V (Floating Ground 5V). D509 cathode. Source FG15V (Floating Ground 15V). D508 cathode. Location Back Side of Board August 2010 42PJ350 Plasma...

  • Page 59: Y - Sus 18V Generation Checks

    Y-SUS board on P101 pins 1~3 to the Control Board. Checked at Cathode Side D506. Standby: 0V Run: 18.24V Diode Check: 1.14V Location D506 18.24V T502 D506 18V Source Cathode Right Side Just to the right of T502 August 2010 42PJ350 Plasma...

  • Page 60: Y - Sus Fuse Information

    FS203 FS202 Protects VS (VA) 10A/125V FS202 (VS) 4V/250V FS203 Protects VA which leaves the Y-SUS on P203. Diode Check Open Diode Check Open With Board With Board Disconnected or Connected. Disconnected or Connected. August 2010 42PJ350 Plasma...
  • Page 61 P201 Connector "Y-SUS" to "Power Supply" P811 Label Diode Check *206V Open *60V Open P201 9~10 5.25V 2.12V * Note: These voltages will vary in accordance with Panel Label Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...

  • Page 62: Y - Sus P209 Plug Information

    Voltage and Diode Mode Measurement P211 Connector "Y-SUS" to "Z-SUS" P2 Label Diode Check P209 *60V Open * Note: This voltage will vary in accordance with Panel Label Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...
  • Page 63 0.23V 3.19V 1.85V 2.81V SET-DN 0.05V 2.81V Diode Mode Readings ER_DN 1.05V 2.81V taken with all connectors Disconnected. TIP: Use the Control Board (P101) side of this connector DVM in Diode Mode. to make voltage readings. August 2010 42PJ350 Plasma...

  • Page 64: Y - Drive Board Section

    Scanning is synchronized by receiving Logic scan signals from the Control board. The 42PJ350 uses 8 Driver ICs on one Y-Drive Board commonly called “Y-Drive Buffers” but are actually Gate Arrays. August 2010...
  • Page 65 The Y-Drive board operates from Floating Ground, (no reference to Chassis Gnd). P106 Logic (Scan Control Floating Gnd 5V can be measured across C18 signals) and Floating Ground 5V or C523 surface mount electrolytic capacitors. August 2010 42PJ350 Plasma...

  • Page 66: Y - Drive Layout

    Warning: Never run the Y-SUS with P106 disconnected. You VScan must remove the Y-Drive board completely due to these FG lugs. The VScan Standoff delivers the P106 VScan signal to the Y-Drive Boards. There is per/board. August 2010 42PJ350 Plasma...

  • Page 67: Y - Drive Diode Check Scan And Fg

    FG5V TP (P106 pins 2 and 3) FG5V Fuse 2.57V with Red Lead on Scan 0.53V with Black Lead on Scan Any Output Buffer TP Open with Red Lead on Scan Scan 0.80V with Black Lead on Scan Signal August 2010 42PJ350 Plasma...

  • Page 68: Y - Drive Buffer Troubleshooting

    6 Ribbon cables communicating with the Panel’s (Horizontal Electrodes) totaling 768 lines determining the Panel’s Vertical Any of these output lugs can be checked from resolution pixel count. floating ground. Look for shorts indicating a defective Buffer IC August 2010 42PJ350 Plasma...
  • Page 69 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). August 2010 42PJ350 Plasma...

  • Page 70: Incorrectly Seated Y - Drive Flexible Ribbon Cables

    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. August 2010 42PJ350 Plasma...
  • Page 71 FG5V (4.9V) measured from Pins 15 or 16 to Floating Gnd. For Floating Ground, use any screw on the far left hand side of the Y-SUS board except the one just above P106, this is the Y-Scan output. Y-SUS Y-Drive Board Board August 2010 42PJ350 Plasma...
  • Page 72 Gnd to Floating Gnd TP 12-13 DATA without an Isolation Transformer. 14-15 All logic pins about (420V p/p) 16-17 SUS_DN (FG) Pins 6~15 are Logic (Drive) Signals to the Y-Drive Upper. Y-SUS Y-Drive Board Board August 2010 42PJ350 Plasma...

  • Page 73: Y - Drive P106 Connector Diode Mode Testing

    0.76V 14-15 2.63V Open 0.62V 16-17 SUS_DN (FG) Red Lead Black Lead Y-SUS Board should be Y-Drive disconnected for the Board Diode Mode test. Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...

  • Page 74: Z - Sus Section

    • DC Voltage and Waveform Test Points • Z BIAS Alignment • Diode Mode Test Points Operating Voltages Power Supply Supplied VS M5V Routed through Control Board Y-SUS Supplied 18V Routed through Control Board Developed on Z-SUS Z Bias August 2010 42PJ350 Plasma...

  • Page 75: Z - Sus Block Diagram

    Control board Receives Logic Signals Via 2 FPC Circuits generate erase, Flexible Generates Z Bias 100V Printed sustain waveforms Circuits NO IPMs FET Makes Drive waveform Display Simplified Block Diagram of Z-SUS (Sustain) Board Panel Z-SUB August 2010 42PJ350 Plasma...

  • Page 76: Z - Sus Board Component Identification

    No IPMs Test Point Waveform Development FETs from Control M5V from SMPS to the Y-SUS generates +18V. P3 To Z-SUB M5V and 18V are routed through the Control board. Logic Signals generated on the Control board. August 2010 42PJ350 Plasma...
  • Page 77 42PJ350 Z-SUS Layout Drawing 42PJ350 Z-SUS Layout Drawing 1~2 (VS), 4~7 (ER_COM 133V RMS) Q201 Z-Bias Waveform D101 VZB TP Q202 R151 Q203 Z-SUS BOARD p/n: EBR63038801 Q205 D103 Q206 Q202 Q102 11~12 (18V) 9~10 (M5V) August 2010 42PJ350 Plasma...

  • Page 78: Z - Sus Waveform

    Vzb voltage 110V ± 1V TIP: The Z-Bias (VZB) Adjustment is a DC level adjustment. This is only to show the effects of Z-Bias on the waveform. This Waveform is just for reference to observe the effects of Zbz adjustment August 2010 42PJ350 Plasma...
  • Page 79 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. August 2010 42PJ350 Plasma...
  • Page 80 P2 Location: Top Left Label Diode Check *205V Open ER_COM 98V~102V Open Pin 1 7~11 * Note: This voltage will vary in accordance with Panel Label Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...

  • Page 81: Connector P1 To Control P102 Voltages And Diode Checks

    0.1V 2.82V ZSUS_DN 0.86V 2.82V ZSUS_UP 0.15V 2.82V Open Open +15V 18.24V 1.9V +15V 18.24V 1.9V There are no Stand-By voltages on this connector Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...

  • Page 82: Control Board Section

    From the Y-SUS Supplied +18V (Routed through the Control board to the Z-SUS) (Not used by the Control Board) Developed on the Control Board +1.8V for internal use +3.3V for internal use +3.3V for the X-Boards (TCPs) August 2010 42PJ350 Plasma...

  • Page 83: Control Board Pictorial

    EBR63632301 n/c (For ROM Updates) LVDS To Z-SUS P163 P121 P102 P101 IC121 VS_DA For External Trigger IC102 IC171 Pattern Generator For Panel Test D101 Should be blinking To Y-SUS P161 P162 To X-Left To X-Right August 2010 42PJ350 Plasma...

  • Page 84: Control Board Component Identification And Checks

    * If the complaint is no video and shorting the points (AutoGen) 0.32V Red Lead causes video to appear suspect the Main board or LVDS cable. 0.32V Blk Lead Note: LVDS Cable must be removed for Auto Gen to work. August 2010 42PJ350 Plasma...
  • Page 85 01) 3.3V Pin 1 IC151 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 CONTROL BOARD TEMPERATURE temperature. SENSOR LOCATION August 2010 42PJ350 Plasma...

  • Page 86: Locking On To The Y - Drive Or Z - 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. August 2010 42PJ350 Plasma...
  • Page 87 Osc. Check: 25Mhz Left Leg The frequency of the sine wave is 25 MHZ. Missing this clock signal will halt operation of the panel drive signals. X103 CONTROL BOARD Osc. Check: 25Mhz Right Leg CRYSTAL LOCATION August 2010 42PJ350 Plasma...

  • Page 88: Control Board Signal (Simplified Block Diagram)

    2 Buffer Outputs 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 August 2010 42PJ350 Plasma...
  • Page 89 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 P102 Pins 11~12. The M5V also leaves on P102 Pins 9~10. August 2010 42PJ350 Plasma...
  • Page 90 2.82V Dummy_3 1.97V 2.82V Dummy_1 1.04V 2.81V Dummy_4 1.23V Open SUS_UP 0.05V 2.82V CTL_OE 0.23V Open SET_DN 2.10V 2.82V P101 Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. August 2010 42PJ350 Plasma...
  • Page 91 LVDS Removed Example of Normal Signals measured at 1V p/p at 10µSec Pins are close together, Use caution. Pins 2~5, 7~8, 11~12, 24~25 are LVDS Video Signals. Pins 9~10 and 22~23 are clock signals for the data. August 2010 42PJ350 Plasma...

  • Page 92: Control Board Lvds P121 Connector Voltages And Diode Check

    1.23V 1.23V Enables the Control Board RD1P 1.31V 1.23V DISP_EN 2.79V Open Module_SDA1 3.29V Open Module_SCL1 3.29V Open Open Open Blue Pins indicate 10 bit differential video signal Note: There are no voltages in Stand-By mode. August 2010 42PJ350 Plasma...

  • Page 93: Control Board P102 Connector Pin Id And Voltages

    Open ER_UP 0.1V Open SUS_DN 0.86V Open SUS_UP 0.15V Open 1.47V 1.47V +15V 18.24V Open +15V 18.24V Open P102 Label Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. August 2010 42PJ350 Plasma...
  • Page 94 3.3V 0.64V A1_N_2 1.18V 1.31V 3.3V 3.3V 0.64V CLK_P_1 1.12V 1.35V STB0 3.24V Open CLK_N_1 1.18V 1.31V STB1 3.27V Open X_BLK 3.24V Open A2_P_3 1.12V 1.35V X_POL 1.86V Open A2_N_3 1.18V 1.31V Open A1_P_3 1.12V 1.35V August 2010 42PJ350 Plasma...
  • Page 95 CLK_N_3 1.18V 1.31V CLK_P_5 1.12V 1.35V CLK_N_5 1.18V 1.31V A2_P_7 1.12V 1.35V A2_N_7 1.18V 1.31V A2_P_11 1.12V 1.35V A1_P_7 1.12V 1.35V A2_N_11 1.18V 1.31V A1_N_7 1.18V 1.31V A1_P_11 1.12V 1.35V A1_N_11 1.18V 1.31V A2_P_8 1.12V 1.35V August 2010 42PJ350 Plasma...
  • Page 96 • 3.3V: Control board develops 3.3V (IC121) and routes to the Left X- Board via ribbon connector P232 pins 9~11. • 3.3V: Control board develops 3.3V (IC121) and routes to the Right X-Board via ribbon connector P331 pins 42~44. August 2010 42PJ350 Plasma...
  • Page 97 •The X-Boards have connectors to 12 TCPs, 6 on the left and right. •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 3072 vertical electrodes. August 2010 42PJ350 Plasma...
  • Page 98 The Vertical Address The Vertical Address buffers (TCPs) have buffers (TCPs) have one heat sink one heat sink indicated by the arrow. indicated by the arrow. It protects all 12 TCPs. It protects all 12 TCPs. August 2010 42PJ350 Plasma...
  • Page 99 On any Va (Open) TCPs connected. On any Va (Open) TCPs disconnected. On any Va (Open) TCPs disconnected. On 3.3V (0.39V) TCPs connected. On 3.3V (0.6V) TCPs connected. On 3.3V (Open) TCPs disconnected. On 3.3V (Open) TCPs disconnected. August 2010 42PJ350 Plasma...
  • Page 100 X Drive Board Y-SUS Board Logic Control Board 3.3V 256 total lines Chocolate 128 lines 128 lines Taped Carrier Package 256 Vertical Electrodes Long Black Attached directly Heat Sink to Flexible cable Back side of TCP Ribbon August 2010 42PJ350 Plasma...
  • Page 101 Flexible Printed Ribbon Cable to TCP IC On any Gnd Look for any TCPs being discolored. On the below: Ribbon Damage. 3.3V Cracks, folds Reversed Pinches, scratches, On Va (0.59V) On Va (Open) etc… On 3.3V (1.08V) On 3.3V (Open) August 2010 42PJ350 Plasma...

  • Page 102: Tcp 3.3V B+ Check

    There is a small feed trough and a Cap, you can use for Test Points. Example here from P305. You can only check for continuity back to IC231, you can not run the set with heat sink removed. August 2010 42PJ350 Plasma...
  • Page 103 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. August 2010 42PJ350 Plasma...
  • Page 104 Open * 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. August 2010 42PJ350 Plasma...
  • Page 105 On Chassis Gnd On Chassis Gnd On Va (Open) Y-SUS connector On Va (0.52) Y-SUS connector removed, TCPs connected. removed, TCPs connected. On Va (Open) all connectors removed, On Va (Open) all connectors removed, TCPs disconnected. TCPs disconnected. August 2010 42PJ350 Plasma...

  • Page 106: Main Board Section

    • Receives Intelligent Sensor data from the Front IR Board (via SCL/SDA). • Drives front Power LEDs. • Distributes +3.3V_ST and +3.3V_MST to the Front IR Board. • Routes 10 bit LVDS video signals to the Control Board. August 2010 42PJ350 Plasma...
  • Page 107 Ft IR to Ft IR LVDS LVDS SMPS SMPS P802 P802 Audio Audio Microprocessor Video Processor Optical Optical Audio Audio Audio Audio Remote Remote RS232 RS232 HDMI HDMI HDMI HDMI Rear Rear RS232 RS232 Inputs Inputs August 2010 42PJ350 Plasma...
  • Page 108 42PJ350 Main Front Layout Drawing 42PJ350 Main Front Layout Drawing To SMPS P301 P703 IC308 P704 IC202 IC201 To Ft IR L313 Mstar L803 Micro/ 12Mhz IC801 Video IC402 To SPK X402 25Mhz P802 L804 MAIN BOARD X401 p/n: EBT60953602 All Pins 31.875Mhz...
  • Page 109 42PJ350 Main Board Front Side Component Voltages IC202 7V (to IC405) Q401 Tuner CVBS Q502 HDMI CEC D501 B+ Routing Pin Regulator Pin Buffer (Analog) Pin Buffer Pin to IC502 [1] Gnd [B] 1.19V [1 B] Gnd [A1] 0V [2] Gnd [E] 1.86V...
  • Page 110 42PJ350 Main Back Layout Drawing 42PJ350 Main Back Layout Drawing IC301 IC302 Q301 IC501 Q302 Q703 IC701 IC203 IC303 Q504 IC304 Q303 Q304 IC703 IC504 D502 MAIN BOARD p/n: EBT60953602 IC306 Q501 IC502 Q702 Q503 IC503 IC307 IC602 July 2010...
  • Page 111 42PJ350 Main Board Back Side Component Voltages IC203 Winbond Serial IC303 3.3V_MST IC501 HDCP Data IC701 USB 5V Q301 Driver for 5V_MST Q702 RS232 Pin Flash Pin Regulator Pin EEPROM Pin Limiter Pin Switch Q302 Pin Tx Buffer [1] 0V...
  • Page 112 The Tuner in this set is discreet components (Silicon Tuner) and no longer a self contained unit (can). Check for Tuner B+: 3.3V on IC306 and 1.8V on IC307 Back Side bottom left hand side Front bottom right hand side August 2010 42PJ350 Plasma...
  • Page 113 X402 25MHZ X402 1.48V X402 Runs only during “On” (Overtone Crystal) Top Side 2.8V p/p Bottom Side 4.2V p/p 1.6V X401 31.875MHZ X401 0.66V 0.54V MAIN Board Crystal Location Left Side 0.7V p/p Right Side 1V p/p August 2010 42PJ350 Plasma...
  • Page 114 (2) Pull the Cable from the Connector by rocking back and forth. If the Connector Locks have been damaged and will not release, use a thin object and slide straight down (as indicated by the arrows below) and release the locks. August 2010 42PJ350 Plasma...
  • Page 115 Pin 1 front row right side Pin 11 10uSec per/div Pin 12 10uSec per/div Note: There are no wires into pins 1 and 2. Pin 11 2uSec per/div Pin 12 2uSec per/div Main Board P703 Location August 2010 42PJ350 Plasma...

  • Page 116: Main Board Plug P703 " Lvds " Voltages

    1.29V 0.86V RC2+ 1.23V 0.86V RC2- 1.27V 0.86V RB2+ 1.31V 0.86V RB2- 1.18V 0.86V RA2+ 1.37V 0.86V RA2- 1.13V 0.86V PC_SER_CLK 0.59V 1.02V PC_SER_DATA 3.24V 1.52V DISP_EN 2.79V 0.49V Diode Mode Check with the Board Disconnected. August 2010 42PJ350 Plasma...
  • Page 117 Open 7 & 8 Intelligent EYE_SCL 3.29V 2.63V Sensor EYE_SDA 0.23V 3.29V 2.63V Stand-By 3.3VST 3.29V 3.29V 1.09V 3.3V 3.3V_MST 3.29V 0.55V LED_BLUE Open Diode Mode Readings taken with all connectors Disconnected. DVM in Diode Mode. August 2010 42PJ350 Plasma...
  • Page 118 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. Diode Mode Check with the Board Disconnected. DVM in the Diode mode. August 2010 42PJ350 Plasma...

  • Page 119: Audio Amp

    P802 Connector "Main" to "Speakers" Label Diode Mode 8.39V Open 8.39V Open 8.39V Open 8.39V Open IC801 IC801 Main Board Location Audio Amp Audio Amp P802 Speaker Connector Diode Mode Check with the Board Disconnected. DVM in the Diode mode. August 2010 42PJ350 Plasma...

  • Page 120: Front Ir, Power Led And Soft Touch Key Pad Section

    Processor by 2 separate pins from the Main board SCL/SDA 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 the Front IR board and out P100 to P704 pins 3 and 4. August 2010 42PJ350 Plasma...
  • Page 121 When properly seated, the ribbon will be under the two plastic tabs in the con nector. seated, the ribbon will be under the two plastic tabs in the con nector. August 2010 42PJ350 Plasma...
  • Page 122 Open 3.3V For Readings when any Key is touched, see Soft Key Pad Section For Key 1 and Key 2. Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. August 2010 42PJ350 Plasma...
  • Page 123 Voltage Measured with a Scope Measuring Voltage on Pin 1 with DVM turns the TV on. If TV is on, Input Menu pops up. Diode Mode Readings taken with all connectors Disconnected. Black lead on Gnd. DVM in Diode Mode. August 2010 42PJ350 Plasma...

  • Page 124: Soft Touch Key Pad Section (Board Layout And Identification)

    Key 1 or Key 2 line which is then interpreted by the Microprocessor in the Main board IC1. P101 IC100 static sensitive Front the static key press sensitive key pad decoder Button Identification for the Front the static sensitive key pad August 2010 42PJ350 Plasma...
  • Page 125 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. Plastic Frame Lifted up slightly Soft Touch Key Pad P101 Ribbon Cable August 2010 42PJ350 Plasma...
  • Page 126 P100 Connector “IR/LED Control Board“ to P703 “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. August 2010 42PJ350 Plasma...

  • Page 127: Invisible Speaker System Section

    Invisible Speaker System Overview (Full Range Speakers) Invisible Speaker System Overview (Full Range Speakers) p/n: EAB60962801 The 42PJ350 contains the Invisible Speaker system. The Full Range Speakers point downward, so there are no front viewable speaker grills or air ports. Installed View...
  • Page 128 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. August 2010 42PJ350 Plasma...
  • Page 129 42PJ350 (42T1 Panel) CIRCUIT INTERCONNECT DIAGRAM 42PJ350 (42T1 Panel) CIRCUIT INTERCONNECT DIAGRAM Waveform TP on the Y-Drive Board * Note: This voltage will NOTE: Diode tests are conducted with the board disconnected. vary in accordance with NOTE: Grayed components are on the back of the PWB.
  • Page 130 42PJ350 Main Board (Front Side) Component Voltages IC202 7V (to IC405) Q401 Tuner CVBS Q502 HDMI CEC D501 B+ Routing Pin Regulator Pin Buffer (Analog) Pin Buffer Pin to IC502 [1] Gnd [B] 1.19V [1 B] Gnd [A1] 0V [2] Gnd [E] 1.86V...
  • Page 131 42PJ350 LVDS 42PJ350 LVDS Video Waveforms Video Waveforms Connector P703 Configuration - indicates signal pins. 15 and 16 are the Video Clock and Data lines...
  • Page 132 End of Presentation End of Presentation This concludes the Presentation Thank You August 2010 42PJ350 Plasma...

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