Panasonic TC-P50U2 Plasma HDTV Service Manual

2 1 Safety Precautions ----------------------------------------------- 3 1.1. General Guidelines ----------------------------------------3 2 Warning -------------------------------------------------------------- 4 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices ----------4 2.2. About lead free solder (PbF) ----------------------------5 3 Service Navigation------------------------------------------------ 6 3.1. Service Hint--------------------------------------------------6 3.2. Applicable signals------------------------------------------7 4 Specifications ------------------------------------------------------ 8 5 Service Mode ------------------------------------------------------- 9 5.1. How to enter into Service Mode ------------------------9 5.2. Option - Mirror--------------------------------------------- 11 5.3. Service tool mode ---------------------------------------- 11 5.4. Hotel mode------------------------------------------------- 12 5.5. Data Copy by SD Card --------------------------------- 13 6 Troubleshooting Guide---------------------------------------- 16 6.1. Check of the IIC bus lines------------------------------ 16 6.2. Power LED Blinking timing chart --------------------- 17 6.3. No Power--------------------------------------------------- 18 6.4. No Picture-------------------------------------------------- 19 6.5. Local screen failure -------------------------------------- 20 7 Service Fixture & Tools --------------------------------------- 21 7.1. SC jig -------------------------------------------------------- 21 8 Disassembly and Assembly Instructions --------------- 22 8.1. Remove the Rear cover -------------------------------- 22 8.2. Remove the AC inlet ------------------------------------ 22 8.3. Remove the P-Board------------------------------------ 22 8.4. Remove the Side terminal cover and Side shield metal ------------------------------------------------ 22 8.5. Remove the Tuner unit --------------------------------- 23 8.6. Remove the A-Board------------------------------------ 23 8.7. Remove the Speakers ---------------------------------- 23 8.8. Remove the SU-Board---------------------------------- 23 8.9. Remove the SD-Board---------------------------------- 23 8.10. Remove the SC-Board---------------------------------- 24 8.11. Remove the SS2-Board -------------------------------- 24 8.12. Remove the SS-Board ---------------------------------- 24 8.13. Remove the Hanger metals and the Stand brackets----------------------------------------------------- 24 8.14. Remove the C1-Board ---------------------------------- 25 8.15. Remove the C2-Board ---------------------------------- 25 8.16. Remove the C3-Board ---------------------------------- 25 8.17. Remove the Plasma panel section from the Cabinet assy (glass)------------------------------------- 25 8.18. Remove the S-Board------------------------------------ 26 8.19. Remove the Glass holders ---------------------------- 26 8.20. Remove the K-Board------------------------------------ 26 8.21. Replace the plasma panel ----------------------------- 26 9 Measurements and Adjustments -------------------------- 27 9.1. Adjustment------------------------------------------------- 27 10 Block Diagram --------------------------------------------------- 33 10.1. Main Block Diagram ------------------------------------- 33 10.2. Block (1/4) Diagram ------------------------------------- 34 10.3. Block (2/4) Diagram ------------------------------------- 35 10.4. Block (3/4) Diagram ------------------------------------- 36 10.5. Block (4/4) Diagram ------------------------------------- 37 11 Wiring Connection Diagram --------------------------------- 39 11.1. Caution statement.--------------------------------------- 39 11.2. Wiring (1)--------------------------------------------------- 39 11.3. Wiring (2)--------------------------------------------------- 40 11.4. Wiring (3) -------------------------------------------------- 41 12 Schematic Diagram -------------------------------------------- 43 12.1. Schematic Diagram Note ------------------------------ 43 12.2. P-Board (1/3) Schematic Diagram ------------------ 44 12.3. P-Board (2/3) Schematic Diagram ------------------ 45 12.4. P-Board (3/3) Schematic Diagram ------------------ 46 12.5. A-Board (1/14) Schematic Diagram----------------- 47 12.6. A-Board (2/14) Schematic Diagram----------------- 48 12.7. A-Board (3/14) Schematic Diagram----------------- 49 12.8. A-Board (4/14) Schematic Diagram----------------- 50 12.9. A-Board (5/14) Schematic Diagram----------------- 51 12.10. A-Board (6/14) Schematic Diagram----------------- 52 12.11. A-Board (7/14) Schematic Diagram----------------- 53 12.12. A-Board (8/14) Schematic Diagram----------------- 54 12.13. A-Board (9/14) Schematic Diagram----------------- 55 12.14. A-Board (10/14), K-Board and S-Board Schematic Diagram ------------------------------------- 56 12.15. A-Board (11/14) Schematic Diagram --------------- 57 12.16. A-Board (12/14) Schematic Diagram --------------- 58 12.17. A-Board (13/14) Schematic Diagram --------------- 59 12.18. A-Board (14/14) Schematic Diagram --------------- 60 12.19. C1-Board Schematic Diagram ----------------------- 61 12.20. C2-Board (1/2) Schematic Diagram ---------------- 62 12.21. C2-Board (2/2) Schematic Diagram ---------------- 63 12.22. C3-Board (1/2) Schematic Diagram ---------------- 64 12.23. C3-Board (2/2) Schematic Diagram ---------------- 65 12.24. SC-Board (1/4) Schematic Diagram ---------------- 66 12.25. SC-Board (2/4) Schematic Diagram ---------------- 67 12.26. SC-Board (3/4) Schematic Diagram ---------------- 68 12.27. SC-Board (4/4) Schematic Diagram ---------------- 69 12.28. SS-Board (1/2) Schematic Diagram ---------------- 70 12.29. SS-Board (2/2) and SS2-Board Schematic Diagram ---------------------------------------------------- 71 13 Printed Circuit Board------------------------------------------ 72 13.1. P-Board ---------------------------------------------------- 72 13.2. K, S and SS2-Board ------------------------------------ 75 13.3. A-Board ---------------------------------------------------- 76 13.4. C1-Board--------------------------------------------------- 78 13.5. C2-Board--------------------------------------------------- 79 13.6. C3-Board--------------------------------------------------- 80 13.7. SC-Board -------------------------------------------------- 81 13.8. SS-Board -------------------------------------------------- 83 14 Exploded View and Replacement Parts List----------- 85 14.1. Exploded View and Mechanical Replacement Parts List--------------------------------------------------- 85 14.2. Electrical Replacement Parts List ------------------- 91

3 1 Safety Precautions 1.1. General Guidelines 1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials. 2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead. 3. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight out. 4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed. 6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards. 1.1.1. Leakage Current Cold Check 1. Unplug the AC cord and connect a jumper between the two prongs on the plug. 2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1Mohm and 5.2Mohm. When the exposed metal does not have a return path to the chassis, the reading must be 1.1.2. Leakage Current Hot Check (See Figure 1.) 1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5kohm, 10 watts resistor, in parallel with a 0.15μF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1. 3. Use an AC voltmeter, with 1000 ohms/volt or more sensi- tivity, to measure the potential across the resistor. 4. Check each exposed metallic part, and measure the volt- age at each point. 5. Reverse the AC plug in the AC outlet and repeat each of the above measurements. 6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measure- ment is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer. Figure 1

4 2 Warning 2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec- trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor [chip] components. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ES devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can generate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or compara- ble conductive material). 7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed. Caution Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the brush- ing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).

5 2.2. About lead free solder (PbF) Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu). That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available. This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d suggest the use of Pb free solder as well, although Pb solder may be used. PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB. Caution • Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C). • Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C). If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder. • After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the opposite side. (see figure below) Suggested Pb free solder There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. How- ever, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

6 3 Service Navigation 3.1. Service Hint Board Name Function Board Name Function P Power Supply C1 Data Driver (Lower Right) C2 Data Driver (Lower Center) A DC-DC Converter, Tuner Speaker out, AV Terminal, HDMI in, SD Card Digital Signal Processor, Nile-TCON Format Converter, Plasma AI, Sub-Field Processor Key Switch C3 Data Driver (Lower Left) SC Scan Drive SS Sustain Drive SS2 Sustain out (Lower) SU Scan out (Upper) Non serviceable. SU-Board should be exchanged for service. SD Scan out (Lower) Non serviceable. SD-Board should be exchanged for service. K Remote receiver, Power LED, C.A.T.S sensor S Power Switch

7 3.2. Applicable signals * Mark: Applicable input signal for Component (Y, PB, PR) and HDMI Note • Signals other than those shown above may not be displayed properly. • The above signals are reformatted for optimal viewing on your display. horizontal frequency (kHz) vertical frequency (Hz) COMPONENT HDMI 525 (480) / 60i 15.73 59.94 * * 525 (480) /60p 31.47 59.94 * * 750 (720) /60p 45.00 59.94 * * 1,125 (1,080) /60i 33.75 59.94 * * 1,125 (1,080)/60p 67.43 59.94 * 1,125 (1,080)/60p 67.50 60.00 * 1,125(1,080)/24p 26.97 23.98 * 1,125(1,080)/24p 27.00 24.00 *

8 4 Specifications Power Source AC 120 V, 60 Hz Power Consumption Maximum 353 W Standby condition 0.3 W Plasma Display panel Drive method AC type Aspect Ratio 16:9 Visible screen size 50 inch class (49.9 inches measured diagonally) (W × H × Diagonal) 43.5 inch × 24.4 inch × 49.9 inch (1,105 mm × 622 mm × 1,268 mm) (No. of pixels) 2,073,600 (1,920 (W) × 1,080 (H))[5,760 × 1,080 dots] Sound Audio Output 20 W [ 10 W + 10 W ] ( 10 % THD ) Channel Capability (Digital/Analog) VHF/ UHF: 2 - 69, CATV: 1 - 135 Operating Conditions Temperature: 32 °F - 104 °F (0 °C - 40 °C) Humidity: 20 % - 80 % RH (non-condensing) Connection Terminals VIDEO IN 1-2 VIDEO: RCA PIN Type × 1 1.0 V [p-p] (75 Ω) AUDIO L-R: RCA PIN Type × 2 0.5 V [rms] COMPONENT IN 1-2 Y: 1.0 V [p-p] (including synchronization) PB, PR: ±0.35 V [p-p] AUDIO L-R: RCA PIN Type × 2 0.5 V [rms] HDMI 1-3 TYPE A Connector × 3 This TV supports [HDAVI Control 5] function. Card slot SD CARD slot × 1 DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber Optic FEATURES 3D Y/C FILTER CLOSED CAPTION V-Chip VIERA IMAGE VIEWER HDAVI Control 5 Dimensions (W × H × D) Including pedestal 48.0 inch × 32.2 inch × 14.1 inch (1,218 mm × 817 mm × 357 mm) TV Set only 48.0inch × 30.3 inch × 3.7 inch (1,218 mm × 769 mm × 93 mm) Mass Including pedestal 68.4 lb. (31.0 kg) TV Set only 64.0 lb. (29.0 kg) Note • Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.

9 5 Service Mode 5.1. How to enter into Service Mode While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds. 5.1.1. Key command [1] button...Main items Selection in forward direction [2] button...Main items Selection in reverse direction [3] button...Sub items Selection in forward direction [4] button...Sub items Selection in reverse direction [VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

10 5.1.2. Contents of adjustment mode • Value is shown as a hexadecimal number. • Preset value differs depending on models. • After entering the adjustment mode, take note of the value in each item before starting adjustment. 5.1.3. How to exit Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control. Main item Sub item Sample Data Remark ADJUST CONTRAST 46 COLOR 00 TINT 00 SUB-BRT 000 WB-ADJ R-CUT 80 G-CUT 80 B-CUT 80 R-DRV FD G-DRV FB B-DRV FF ALL-DRV FF OPTION BOOT ROM Factory Preset STBY-SET - - EMERGENCY ON CLK MODE ON CLOCK FFF MIRROR 00 (See next) EDID-CLK HIGH VSUS AGING ALL WHITE Built-in test patterns can be displayed. AI ALL BLUE + WHITE FLAME AI ALL GREEN AI ALL RED LOW STEP WHITE LOW STEP BLUE LOW STEP GREEN LOW STEP RED RAMP WHITE RAMP RED RAMP GREEN RAMP BLUE A-ZONE B-ZONE 1% WINDOW COLOR BAR 9 POINT BRIGHTNESS WHITE FLAME AI ALL BLUE TWICE FIXATION 1% WINDOW SCROLL ON/OFF OR RGBW R/G/B/W AGING MODE 0.5 TIME FIXATION ALL WHITE ALL WHITE WITH COUNT SRV-TOOL - See next

Panasonic TC-P50U2 Plasma HDTV Service Manual

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