Panasonic TH-42PX50U Replacement Procedure
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Panasonic TH-42PX50U Replacement Procedure

Panel replacement
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See also: Service Manual , Technical Manual
Panel Replacement Procedure
TH-37PX50U
TH-42PD50U
TH-42PX50U

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Summary of Contents for Panasonic TH-42PX50U

  • Page 1 Panel Replacement Procedure TH-37PX50U TH-42PD50U TH-42PX50U...
  • Page 2 Plasma Panel Replacement Report Form Instructions 9. Paste a digital image of the symptom in the Requesting a Panel "Picture of Symptom" box or attach the picture to the email sent to the Technical Hotline. Select 1- Contact the Technical Hotline at 1-800-743-2335 the “Settings”...
  • Page 3 IMPORTANT: Defective panel must be ‰ * Use the "insert" function from Excel's "Insert" menu, returned to Panasonic before parts not from the "Insert" available by right-clicking. When warranty reimbursement can be made. using Windows' right-click function, a picture file copied to the clip-board cannot be inserted or pasted, 27.
  • Page 4 Panasonic Broadcast & Television Systems Co. Tel 81-726-24-7743, Fax 82-726-22-8205 50 Meadowlands Parkway 2B-6 Tel 81-726-82-6647, Fax 81-726-82-6679 50 Meadowlands Parkway 2A-4 Secaucus, NJ 07094 Secaucus, NJ 07094 (800) 743-2335 (201) 392-4355 Form PR-20051201 ** Gray shaded areas are for Panasonic's use only...
  • Page 5 PASC recognizes the additional time to perform these tasks so we will be adding $100 to the warranty claim at the time of processing to compensate for the extra time and to show appreciation for the extra efforts in assisting Panasonic in improving the quality of our product offerings.
  • Page 6 Unpacking and Repacking the Plasma Panel Panel Replacement Precautions Handling Use extreme care when handling the Plasma Display Panel. Due to the size and fragility, it is recommended that two individuals handle the Plasma Panel to avoid accidental damage. The glass used in the plasma panel is thin, and its structure is extremely susceptible to impact.
  • Page 7 Check for board jumpers. If missing, remove them from the old panel and transfer Figure 5 them to the new panel. 5) Reverse the order of the steps listed above to repack the defective panel for return shipment to Panasonic. Page 2 of 2...
  • Page 8 Agenda ƒEquipment List ƒPanel Handling ƒPreparation of New Panel ƒPCB Description ƒDisassembly and Reassembly Procedure ƒLead Dressing ƒAdjustment ( Driver Setup) Procedure ƒAdjustment (White Balance) of GP8DU Chassis) ƒAdjustment (White Balance) Procedure of older Panels ƒExamples of Defective Panels...

  • Page 9: Equipment List

    Equipment List: ƒElectric Screwdriver (Part # EY6220B or equivalent) ƒDigital Volt Ohmmeter ƒOscilloscope ƒIsolation Transformer ƒAnti-static 5 foot by 4 foot foam cushioning ƒPlasma Stand (Part # TY-ST05K or equivalent) ƒScrew storage bin ƒLarge flat work area ƒColorimeter for white balance adjustment (Sencore CP288 or equivalent) ƒVideo Signal Generator capable of providing NTSC, 480p, 720p and 1080i with adjustable brightness levels.

  • Page 10: Handling Precaution

    Handling Precaution ƒThin Glass = Susceptibility to impact ƒRough Handling = Cracked glass or pixel defects ƒImproper Transportation = Unit should always be in the upright position. ƒLeads or Ribbon Cables = No pulling, no bending, no excessive force ƒ Ribbon cables must be straight when inserted into sockets. Angle insertion can create an electrical short circuit.
  • Page 11 Preparation of the New Panel (1) Page 2...
  • Page 12 Preparation of the New Panel (2) Preparation of the new Panel (2) Caution: Use extreme care when handling the Plasma Display Panel. The glass used in the plasma panel is thin, and its structure is extremely susceptible to impact. Page 3...
  • Page 13 Preparation of the New Panel (3) Page 3...
  • Page 14 Preparation of the New Panel (4) Page 3...

  • Page 15: Rear Cabinet Removal

    Place it in a secure location. Weight: TH-37PX50U = 66.14lb. TH-42PX50U = 76.06lb. TH-50PX50U = 99.21lb. Figure 7. Back Cover Screws Note:The unit can be awkward for one person, be sure to have someone assist you. Page 4...

  • Page 16: Board Layout

    Board Layout Figure 8. Board Layout Page 4...
  • Page 17 Removal of the fans Figure 9. Fans Location 1. Remove the three screws that secure each of the three fans. 2. Place the fans in a secure location Page 5...
  • Page 18 Removal of the Metal Frame Disconnect the speaker connectors (SP-L and SP-R) and the black connector that couples the K board and the DG board. Disconnect the connectors DG3 and DG5 of the DG board, PB7 of the PB board, and PA10 of the PA board.

  • Page 19: Removal Of The P Board

    Removal of the P board 1. Unlock the cable clampers to free the cables. 2. Disconnect the couplers (P2, P5, P9, P10, P11, P12, P23, P25 and P30) from the P board. 3. Remove the six screws as indicated in Figure 12.
  • Page 20 Removal of the P board 1. Disconnect the connectors D20 and D25 from the D board. The connectors D3 and D5 are already disconnected from the DG board. 2. Remove the three screws as indicated in Figure 13 and remove the PB-Board metal frame.

  • Page 21: Removal Of The D Board

    Removal of the D board 1. Disconnect the flexible cables (D31, D32, D33 and D34). 2. Remove the four screws of the D board as indicated in figure 14 and place Figure 14. D Board the D board aside. Page 7...
  • Page 22 Removal of the SU and SD Boards Remove the 2 screws of the SU board as indicated in figure 15. Disconnect the bridge connector (SU45 or SC45) and slide the SU-board to the left to disconnect the coupler (SC41 -SU41) from the SC board.
  • Page 23 Removal of the Rubber Insulators 1. Remove the rubber insulator located underneath the SC board and transfer it to the new panel. 2. Perform the same action for the rubber insulator located underneath the SS board. 3. This done to prevent arcing the boards and the panel.

  • Page 24: Removal Of The Ss2 Board

    Removal of the SS2 Board Figure 18B. SS board connector 1. Disconnect the coupler (SS23) from the SS2 board. 2. Disconnect the flexible cable (SS55). See figure 18 and 18B. 3. Remove the two screws that secure the SS2-Board to the panel.
  • Page 25 Removal of the C Boards Flex Cable Remove the three screws of the cable bracket. Unlock the sockets C11 and C21 to disconnect the two ribbon cables that attach the D board to the C1 and C2 Figure 24. Lower C Boards Flex. Figure 23.
  • Page 26 Removal of the Front Escutcheon Screws Remove the 8 screws as indicated in figure 25. Note: The metal plate at the bottom left side of the picture automatically falls off when the screws are removed. Place it aside for installation into the new panel.
  • Page 27 Removal of the Stand Brackets 1. Remove the three screws of the right stand bracket as indicated in figure 26. 2. Disconnect the connector S1 of the S board. 3. Free the cable from the retainers. CN S1 Figure 26. Right Stand Bracket Page 14...
  • Page 28 Removal of the Front Cabinet With the help of an assistant, the Cabinet can now be removed from the panel by tilting the bottom out and lifting up slightly. Place it in a secure location. Figure 28. Escutcheon Removal Page 15...
  • Page 29 Removal of the Panel from the stand With the help of an assistant, remove the plasma panel from the servicing stand. Lay it, facing down, on a flat surface such as a table covered with a cushioned anti-static mat and a soft cloth to avoid scratching the glass.
  • Page 30 Removal of the Bracket from the Panel Note: Perform this task only after removing the plasma television from the stand. The television should be placed face down on a table equipped with a cushioned anti- static mat and a soft cloth. 1.
  • Page 31 Lead Dressing Figure 39. Lead Dressing Location Page 20...
  • Page 32 Adjustments (Driver Set-up) Panel Label information Item / Preparation Input an APL 100 % white signal. Set the picture controls to: Picture mode = Normal White Balance = Cool Aspect = 16:9 TH-42PX50U Name Test point Voltage Volume Vsus TPVSUS 188V...

  • Page 33: Initialization Pulse Adjustment

    Input a Crosshatch signal. Set the picture mode to Normal, and White Balance to Normal Test point Volume Level Remark TPSC1 (SC) 10 + 10 / -5µ Sec TH-42PX50U 15µ Sec TH-50PX50U VR6557 TPSC1 (SC) 10µ Sec TH-42PX50U (SC) VR6602 10µ...

  • Page 34: Drive Waveform

    Drive Waveform Item / Preparation ƒInput a Crosshatch signal. ƒSet the picture mode to Normal, and White Balance to Normal Figure 34. Initialization Waveform Page 25...
  • Page 35 Entry to Serviceman Mode: Using the Remote Control: 1. Select SET-UP icon and select CABLE mode. 2. Select TIMER icon and set SLEEP time for 30Min. 3. Press “ACTION” twice to exit menus. 4. Tune to Channel 124. 6. Press VOL down on the receiver. Red “CHK” appears in the upper left corner of the screen.
  • Page 36 How To Access The CAT Mode To enter the CAT mode. Use the Up/Down buttons of the remote Select the OTHER (PSRVS). Press the Action button on the remote. To exit the CAT mode, access the ID mode and switch off the main power. C Mode CAT Panel sys 8.2...
  • Page 37 How To Access The CAT Mode Accessing the I C mode? Select the alignment subject by pressing the number “1” or “2” buttons on the remote control. Select the alignment item by pressing the number “4” button on the remote control.
  • Page 38 C Mode Menu Structure Page 32...

  • Page 39: Ntsc White Balance Adjustment

    NTSC White Balance Adjustment Color Temperature Cool (High) 0.276 0.276 20 IRE Window pattern Normal (Mid) 0.288 0.296 Warm (Low) 0.313 0.329 80 IRE Window pattern Table 9. Color Temperature Values Page 34...
  • Page 40 PDP White Balance Adjustment Equipment required: NTSC Pattern Generator, Colorimeter Panel Settings; Picture = Standard Color Temperature = Cool INPUT Aspect Ratio = 16:9 Page 34...
  • Page 41 PDP White Balance Adjustment (Step 1) Using the Pattern generator; apply a 20 IRE Window pattern signal to the panel. Apply the color sensor to the panel and monitor the values. 20 IRE Window Pattern Color Sensor Page 34...
  • Page 42 PDP White Balance Adjustment (Step 2) Adjust the Sub Bright Setting to 10cd/m Page 34...
  • Page 43 PDP White Balance Adjustment (Step 3) Before Y525I :JUST Panel W/B Adj. G Cutoff After Y525I :JUST Panel W/B Adj. G Cutoff Set the G Cutoff Setting Value to 80. Page 34...
  • Page 44 PDP White Balance Adjustment (Step 4-1) Before Y525I :JUST Panel W/B Adj. R Cutoff After Y525I :JUST Panel W/B Adj. R Cutoff Adjust the Red Cutoff settings to match the values in Table 1. Page 34...
  • Page 45 PDP White Balance Adjustment (Step 4-2) Before Y525I :JUST Panel W/B Adj. B Cutoff After Y525I :JUST Panel W/B Adj. B Cutoff Adjust the Blue Cutoff settings to match the values in Table 1.
  • Page 46 PDP White Balance Adjustment (Step 5) Before Y525I :JUST Sub adjust Sub-bright After Y525I :JUST Sub adjust Sub-bright Readjust the Sub Bright setting to 10 cd/m Page 34...
  • Page 47 PDP White Balance Adjustment (Step 6) Apply an 80 IRE window pattern signal to the Panel. 80 IRE Window Pattern Page 34...
  • Page 48 PDP White Balance Adjustment (Step 7) Before Y525I :JUST Panel W/B Adj. G Drive After Y525I :JUST Panel W/B Adj. G Drive Set the G Drive Setting value to E8. Page 34...
  • Page 49 PDP White Balance Adjustment (Step 8-1) Before Y525I :JUST Panel W/B Adj. R Drive After Y525I :JUST Panel W/B Adj. R Drive Adjust the Red Drive settings to match the values in Table 1. Page 34...
  • Page 50 PDP White Balance Adjustment (Step 8-2) Before Y525I :JUST Panel W/B Adj. B Drive After Y525I :JUST Panel W/B Adj. B Drive Sencore isf is a trademark of Sencore corporation. Adjust the Blue Drive settings to match the values in Table 1. Page 34...
  • Page 51 PDP White Balance Adjustment (Step 9) Reapply the 20 IRE pattern and 80 IRE patterns and verify that the drive and cutoff settings match the settings in Table 1, adjust as necessary. Table 1 Color Temperature Cool (High) 0.276 0.276 Normal (Mid) 0.288 0.296...
  • Page 52 PDP White Balance Adjustment (Step 10) Before Adjust the All Drive Settings Y525I :JUST value to FC. Panel W/B Adj. All Drive After Y525I :JUST Panel W/B Adj. All Drive Page 34...
  • Page 53 PDP White Balance Adjustment (Step 11) Reapply the 20 IRE pattern and verify the light settings match the table below, adjust as necessary. Table 1 Color Temperature Cool (High) 0.276 0.276 Normal (Mid) 0.288 0.296 Warm (Low) 0.313 0.329 Page 34...
  • Page 54 PDP White Balance Adjustment (Steps 12-15) The previous steps must be repeated for each color temperature setting. Step 12- Press the R button then the Picture button on the remote control. Change the color temperature to Normal. Press the R button again then the Action button to re-access the IIC mode.
  • Page 55 PDP White Balance Adjustment (Step 16) Change the Color temperature to Cool Mode, then re-adjust the Sub bright value to “30”. Y525I :JUST Sub adjust Sub-bright Sub Bright set to 30 Page 34...
  • Page 56 Examples Of Defective Panels Horizontal and Vertical error Page 37...
  • Page 57 Examples Of Defective Panels (2) Errors Changing Not a Full Width Page 38...
  • Page 58 Examples Of Defective Panels (3) Errors in 2 places Errors Changing Page 38...
  • Page 59 Examples Of Defective Panels (4) These are NOT TH-42PW5UZ or TH-37PW5UZ Panels Double Width Error Page 39...
  • Page 60 Panel Replacement Procedure...

This manual is also suitable for:

Th-42pd50uTh-37px50u

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