Panasonic DMR-EZ28P Bedienungsanleitung

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distribution is a violation of law.

Model No.DMR-EZ28P

DMR-EZ28PC

Vol. 1

Colour

(K).......................Black Type

DVD Recorder

ORDER NO.CHM0802003CE

B24

1 Safety Precaution 3

1.1. General guidelines 3

1.2. Caution for fuse replacement 3

2 Warning 4

2.1. Prevention of Electrostatic Discharge (ESD) to

Electrostatic Sensitive (ES) Devices 4

2.2. Precaution of Laser Diode 5

2.3. Service caution based on legal restrictions 6

3 Service Navigation 7

3.1. Service Information 7

3.2. Caution for DivX 7

4 Specifications 8

5 Location of Controls and Components 10

6 Operation Instructions 12

6.1. Taking out the Disc from DVD-Drive Unit when the Disc

cannot be ejected by OPEN/CLOSE button 12

7 Service Mode 15

7.1. Self-Diagnosis and Special Mode Setting 15

8 Service Fixture & Tools 25

9 Assembling and Disassembling 26

9.1. Disassembly Flow Chart 26

9.2. P.C.B. Positions 26

9.3. Top cover 27

9.4. Front Panel, Front (R) P.C.B and Front (L) P.C.B. 27

9.5. DV Jack and SD/USB P.C.B. 28

9.6. Rear Panel 28

9.7. Digital P.C.B. 29

9.8. DVD Drive 29

9.9. Main P.C.B. and SW P.C.B. 30

10 Measurements and Adjustments 31

10.1. Service Positions 31

10.2. Notice after replacing Digital P.C.B. 33

10.3. Caution for Replacing Parts 33

10.4. Standard Inspection Specifications after Making Repairs

11 Block Diagram 35

11.1. Power Supply Block Diagram 35

11.2. Analog Video Block Diagram 37

11.3. Analog Audio Block Diagram 38

11.4. Analog Timer Block Diagram 39

12 Schematic Diagram 41

12.1. Interconnection Schematic Diagram 41

12.2. Power Supply Section (Main P.C.B. (1/4)) Schematic

Diagram (A) 42

12.3. AV IO (1/4) Section (Main P.C.B. (2/4)) Schematic

Diagram (A) 44

12.4. AV IO (2/4) Section (Main P.C.B. (2/4)) Schematic

Diagram (A) 45

12.5. AV IO (3/4) Section (Main P.C.B. (2/4)) Schematic

Diagram (A) 46

12.6. AV IO (4/4) Section (Main P.C.B. (2/4)) Schematic

Diagram (A) 47

12.7. Tuner Section (Main P.C.B. (3/4)) Schematic Diagram

(TU) 49

12.8. Timer Section (Main P.C.B. (4/4)) Schematic Diagram (T)

12.9. DV Jack Schematic Diagram 52

12.10. SD/USB Schematic Diagram 53

12.11. SW Schematic Diagram 55

12.12. Front (L) Schematic Diagram 55

12.13. Front (R) Schematic Diagram 55

13 Printed Circuit Board 57

13.1. Main P.C.B. 57

13.2. Front (L) P.C.B. 62

13.3. Front (R) P.C.B. 62

13.4. DV Jack P.C.B. 63

13.5. SW P.C.B. 63

13.6. SD/USB P.C.B. 64

14 Appendix for Schematic Diagram 65

14.1. Voltage and Waveform Chart 65

14.2. Waveform Chart 67

14.3. Abbreviations 68

15 Parts and Exploded Views 70

15.1. Exploded Views 70

15.2. Replacement Parts List 72

CONTENTS

Page Page

DMR-EZ28P / DMR-EZ28PC

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

1MΩand 5.2MΩ.

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 1.5kΩ, 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 must not exceed 1/2 milliampere. 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

1 Safety Precaution

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.

1.2. Caution for fuse replacement

DMR-EZ28P / DMR-EZ28PC

2 Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatic Sensitive

(ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called

Electrostatic Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistor-sand

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 harmless motion such as the

brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient

to damage an ES device).

DMR-EZ28P / DMR-EZ28PC

2.2. Precaution of Laser Diode

DMR-EZ28P / DMR-EZ28PC

2.3. Service caution based on legal restrictions

2.3.1. General description about Lead Free Solder (PbF)

The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this

equipment in considering the globally environmental conservation.

The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin

(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that

of the normal solder.

Definition of PCB Lead Free Solder being used

The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.

(See right figure)

Service caution for repair work using Lead Free Solder (PbF)

· The lead free solder has to be used when repairing the equipment for which the lead free solder is used.

(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)

· To put lead free solder, it should be well molten and mixed with the original lead free solder.

· Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.

· Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt

the lead free solder.

· Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30

degrees C (662±86°F).

Recommended Lead Free Solder (Service Parts Route.)

· The following 3 types of lead free solder are available through the service parts route.

RFKZ03D01K-----------(0.3mm 100g Reel)

RFKZ06D01K-----------(0.6mm 100g Reel)

RFKZ10D01K-----------(1.0mm 100g Reel)

Note

* Ingredient: tin (Sn), 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%

DMR-EZ28P / DMR-EZ28PC

3 Service Navigation

3.1. Service Information

3.2. Caution for DivX

DMR-EZ28P / DMR-EZ28PC

4 Specifications

DMR-EZ28P / DMR-EZ28PC

5 Location of Controls and Components

DMR-EZ28P / DMR-EZ28PC

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