Panasonic TC-P50U50 Service Manual and Repair Guide

© Panasonic Corporation 2012. Unauthorized copying and distribution is a violation of law. ORDER NO.MTNC120318CE B34 Canada: B62 50 inch Class 1080p Plasma HDTV Model No. TC-P50U50 GPF15DU Chassis For detailed troubleshooting information and circuit explanations, refer to the "QSM/Service Hints/Troubleshooting Information(TI)" and Seminar/Training Manual/Technical Guide(TG) documents posted on the TSN web site. For information about this model, type TC-P2012 in the model box under "Direct Search". Downloaded from www.Manualslib.com manuals search engine

2 TABLE OF CONTENTS PAGE PAGE 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. PCB Layout--------------------------------------------------6 4 Specifications ------------------------------------------------------ 7 5 Service Mode ------------------------------------------------------- 8 5.1. How to enter into Service Mode ------------------------8 5.2. Option - Mirror--------------------------------------------- 10 5.3. Service tool mode---------------------------------------- 10 5.4. Hotel mode------------------------------------------------- 11 5.5. Data Copy by SD Card --------------------------------- 12 6 Troubleshooting Guide---------------------------------------- 15 7 Service Fixture & Tools --------------------------------------- 16 7.1. SC jig -------------------------------------------------------- 16 8 Disassembly and Assembly Instructions --------------- 17 8.1. Disassembly Flow Chart for the Unit ---------------- 17 8.2. Disassembly Procedure for the Unit----------------- 18 9 Measurements and Adjustments -------------------------- 23 9.1. Adjustment------------------------------------------------- 23 10 Block Diagram --------------------------------------------------- 25 10.1. Main Block Diagram ------------------------------------- 25 10.2. Block (1/4) Diagram ------------------------------------- 26 10.3. Block (2/4) Diagram ------------------------------------- 27 10.4. Block (3/4) Diagram ------------------------------------- 28 10.5. Block (4/4) Diagram ------------------------------------- 29 11 Wiring Connection Diagram --------------------------------- 31 11.1. Caution statement.--------------------------------------- 31 11.2. Wiring (1)--------------------------------------------------- 31 11.3. Wiring (2)--------------------------------------------------- 32 11.4. Wiring (3)--------------------------------------------------- 33 11.5. Wiring (4)--------------------------------------------------- 34 11.6. Wiring (5)--------------------------------------------------- 34 12 Schematic Diagram 13 Printed Circuit Board 14 Exploded View Downloaded from www.Manualslib.com manuals search engine

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 Fasten 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 sensitivity, to measure the potential across the resistor. 4. Check each exposed metallic part, and measure the voltage 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 measurement 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 Downloaded from www.Manualslib.com manuals search engine

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 Electrostatically 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 comparable 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 brushing 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). Downloaded from www.Manualslib.com manuals search engine

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. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used. Downloaded from www.Manualslib.com manuals search engine

6 3 Service Navigation 3.1. PCB Layout Board Name Function P Power Supply Non serviceable. P-Board should be exchanged for service. A Main AV input, processing K Remote receiver, Power LED, C.A.T.S sensor C1 Data Driver (Lower Right) C2 Data Driver (Lower Center) C3 Data Driver (Lower Left) SC Scan Drive SS Sustain Drive 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. Downloaded from www.Manualslib.com manuals search engine

7 4 Specifications TV Note Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate. Power Source AC 120 V, 60 Hz Power Consumption Rated Power 332 W Standby Power 0.2 W Display Panel Panel System Plasma Display panel 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) Number of pixels 1920 × 1080 Speaker 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 RCA PIN (VIDEO, AUDIO-L, AUDIO-R) COMPONENT IN RCA PIN (Y, PB, PR, AUDIO-L, AUDIO-R) HDMI IN 1/2 TYPE A Connector (supports [HDAVI Control 5] function) USB USB2.0 Type A connector DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber Optic OTHERS SD CARD slot Dimensions (W × H × D) Including pedestal 46.6 inch × 29.8 inch × 10.5 inch (1,184 mm × 757 mm × 266 mm) TV Set only 46.6 inch × 28.2 inch × 3.3 inch (1,184 mm × 716 mm × 82 mm) Mass Including pedestal 51.8 lb. (23.5 kg) NET TV Set only 49.6 lb. (22.5 kg) NET Downloaded from www.Manualslib.com manuals search engine

8 5 Service Mode 5.1. How to enter into Service Mode 5.1.1. Purpose After exchange parts, check and adjust the contents of adjustment mode. While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds 5.1.2. 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 ( - ) 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. Downloaded from www.Manualslib.com manuals search engine

9 5.1.4. 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. Main item Sub item Sample Data Remark ADJUST CONTRAST 000 COLOR 3C TINT 00 SUB-BRT 800 WB-ADJ R-CUT 80 G-CUT 80 B-CUT 80 R-DRV DF G-DRV FF B-DRV 7C ALL-CUT 80 ALL-DRV FF OPTION Boot ROM Factory Preset STBY-SET 00 EMERGENCY OFF CLK MODE 00 CLOCK 000 EDID-CLK HIGH MIRROR 00 (See Option-Mirror) VSUS LOW See Vsus selection AGING ALL WHITE Built-in test patterns can be displayed. MIDDLE BLUE WITH MAGENTA OUTSIDE FRAME MIDDLE STEP GREEN MIDDLE STEP RED LOW STEP WHITE ALL BLUE ALL GREEN ALL RED WHITE DIAGONAL STRIPE RED DIAGONAL STRIPE GREEN DIAGONAL STRIPE BLUE DIAGONAL STRIPE A-ZONE & B-ZONE 1% WINDOW COLOR BAR 9 POINTS BRIGHT MEASURE 2 DOT OUTSIDE FRAME DOUBLE FIXED 1% WINDOW VERTICAL LINE SCROLL ON/OFF R/G/B/W ROTATION WITH COUNT DISPLAY HALF FIXED ALL WHITE ALL WHITE WITH COUNT DISPLAY SRV-TOOL 00 See Service tool mode Downloaded from www.Manualslib.com manuals search engine

10 5.2. Option - Mirror Picture can be reversed left and right or up and down. 00 : Default (Normal picture is displayed) 01 : Picture is reversed left and right. 02 : Picture is reversed up and down. Hint : If the defective symptom (e.g. Vertical bar or Horizontal bar) is moved by selection of this mirror, the possible cause is in A-board. 5.3. Service tool mode 5.3.1. How to access 1. Select [SRV-TOOL] in Service Mode. 2. Press [OK] button on the remote control. 5.3.2. Display of SOS History SOS History (Number of LED blinking) indication. From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment. This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting]. 5.3.3. POWER ON TIME/COUNT Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3 sec. Time : Cumulative power on time, indicated hour : minute by decimal Count : Number of ON times by decimal Note : This indication will not be cleared by either of the self-checks or any other command. 5.3.4. Exit 1. Disconnect the AC cord from wall outlet. Downloaded from www.Manualslib.com manuals search engine

Panasonic TC-P50U50 Service Manual and Repair Guide

You're Reading a Preview

Recently Viewed