TX-32AR400 - Panasonic TV Service Manual (repair manual)

tx-32ar400 service manual
4.07 MB
Service Manual

Read Panasonic TX-32AR400 Service Manual online

Panasonic Corporation 2014.   
ORDER NO.PCZ1405127CE   
Model No. 
TABLE OF CONTENTS                                                                                                                                            Page
1 Safety Precaution ------------------------------------------------------------------------------------------------ 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 Troubleshooting Guide ---------------------------------------------------------------------------------------- 
- 9 
      5.1. No Power---------------------------------------------------------------------------------------------------- 
- 9 
      5.2. Abnormal Display ----------------------------------------------------------------------------------------- 1
5.3 No Display --------------------------------------------------------------------------------------------------- 1
5.4 Sound Problem --------------------------------------------------------------------------------------------- 1
5.5 Remote Control Malfunction ---------------------------------------------------------------------------- 1
6 Disassembly and Assembly Instructions --------------------------------------------------------------- 1
7 Block Diagram ---------------------------------------------------------------------------------------------------- 
8 Wiring Connection Diagram --------------------------------------------------------------------------------- 
      8.1. Caution Statement  --------------------------------------------------------------------------------------
   8.2. Wiring -------------------------------------------------------------------------------------------------------- 
9 Exploded View and Replacement Parts List ----------------------------------------------------------- 2
9.1. Exploded View --------------------------------------------------------------------------------------------- 2
9.2. Replacement Parts List ---------------------------------------------------------------------------------- 2
1 Safety Precautions 
1.1. General Guidelines 
1. 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. 
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are 
properly installed. 
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to 
shock hazards. 
4. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials. 
5. 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. 
6. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug 
them straight out. 
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 100 Mohm and 
over. 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 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 
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. 
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). 
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