Panasonic DVD-K29GCS specifications Safety Precautions, General Guidelines

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DVD-K29GCS

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.

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 1MΩ and 5.2MΩ.

When the exposed metal does not have a return path to the chassis, the reading must be .

Figure 1

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 1.5kΩ, 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 mu3st 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.

2 PREVENTION OF ELECTRO STATIC 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 electro static 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 alminum 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, alminum 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.

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Contents Specifications DVD-K29GCSContents Interconnection Schematic Diagram & Schematic Safety Precautions General GuidelinesPrecaution of Laser Diode About lead free solder PbF Prevention of Static Electricity Discharge Handling Precautions for Traverse Unit Optical PickupGrounding for electrostatic breakdown prevention Disassembly Procedure Casing Parts and P.C.B. Positions Disassembling the Casing and Checking P.C.B.SMic P.C.B. and Operation P.C.B Top PanelFront Panel Module P.C.B Rear Panel Mother P.C.B. and Power SW P.C.BMechanism Unit Service Position Assembling and Disassembling the Mechanism Unit Disassembly ProcedureTraverse Unit Tray Assembling the tray unitLoading section Loading motor P.C.B Optical Pickup Unit Procedure for Disassembling the Optical Pickup Unit Traverse Motor Assembling the optical pickup unitDVD-K29GCS Self-Diagnosis Function and Service Modes Optical Pickup Breakdown DiagnosisService Mode Table DVD Self Diagnostic Function-Error CodeLast Error Code saved during no Play DETService mode table DVD-K29GCS Sales demonstration lock function Handling After Completing RepairsRecovery after the dvd player is repaired Firmware version-up of the DVD playerAdjustment Procedures Service Tools and EquipmentImportant points in adjustment Storing and Handling Test DiscsOptical adjustment Optical pickup tilt adjustmentProcedure for screw lock Abbreviations Serial Data Input Voltage Chart Mother P.C.BModule P.C.B MIC P.C.B DVD-K29GCS Block Diagram Overall Block DiagramPower Supply Block Diagram Primary Circuit Secondary CircuitServo Block Diagram Optical Pick UP UnitVideo Block Diagram Optical PICK-UP UnitVideo Main Signal Audio Block Diagram Audio Main SignalInterconnection Schematic Diagram & Schematic Diagram Notes Interconnection Schematic DiagramSchematic Diagram Notes Important safety noticeSchematic Diagram Power Supply Section Mother P.C.B /2 Schematic DiagramFront & AV OUT Section Mother P.C.B /2 Schematic Diagram Q6085 P16 P15 P14 P13 P12 P11 P10 B1ABGC000011IC4301 C0ABBB000118 Mother P.C.B.2/2 Module Schematic Diagram XP0621400LRFKVDS39BKIT Module MIC Schematic Diagram Audio Main SignalPrint Circuit Board Mother P.C.BMother P.C.B. & Module P.C.B. Address Information Mother P.C.BModule P.C.B /2 Component Side Module P.C.B /2 Foil Side Operation P.C.B. & MIC P.C.B Operation P.C.BDVD-K29GCS Exploded Views Casing Parts & Mechanism Section Exploded ViewMechanism Section Exploded View Packing & Accessories Section Exploded View Replacement Parts List ECA2WHG100ECQV1H684JL ECJ3YB1A106K ERJ2GEJ101 ERJ3GEYJ272
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