Panasonic SA-PMX3GN Manuel utilisateur

AMPLIFIER SECTION

RMS output power Stereo Mode

Front Ch (both ch driven) 80 W per channel (3 Ω), 1 kHz,

10% THD

otal RMS Stereo mode power 160 W

FM/AM TUNER, TERMINALS SECTION

Preset memory FM 30 stations

AM 15 stations

Frequenc

Modulation (FM)

Frequenc

range 87.50 to 108.00 MHz

(50 kHz step)

Sensitivit

4.5 dBµV (IHF)

S/N 50 dB 9.0 dBµV

ntenna terminals 75 Ω(unbalanced)

mplitude Modulation (AM)

Frequenc

range 522 to 1629 kHz (9 kHz step)

M Sensitivity S/N 20dB at 999

kHz

660 µV/m

Music Port input jack

Sensitivit

100 mV, 11 kΩ

erminal Stereo, 3.5 mm jack

Phone jack

erminal Stereo, 3.5 mm jack

Option port Version 1

rights reserved. Unauthorized copying and

distribution is a violation of law.

SA-PMX3GN

Colour

(S)... Silver Type

ICD SECTION

Disc played (8 cm or 12 cm)

(1) CD, CD-R/RW (CD-DA, MP3 *)

* MPEG-1 Layer 3, MPEG-2 Layer 3

Pick up

Wavelength (CD) 785 nm

Laser power (CD) CLASS 1

Audio output (Disc)

Number of channels (FL, FR), 2 Channel

IUSB SECTION

USB port

USB standard USB 2.0 full speed

Media file format support MP3 (*.mp3)

USB device file system FAT 12 / FAT 16 / FAT 32

USB port power Max 500 mA

USB ripping bit rate 128 / 192 / 320 kbps

Frequency response 4Hzto20kHz

Output level ( 1 kHz, 0 dB) 1000 mV ± 150 mV

S/N ratio >80dB

Dynamic range >80dB

Separation >60dB

Total harmonic distortion <0.1%

USB recording speed 1x, 4x (CD only)

CD Stereo System

Notes: This model’s mechanism unit is DLS6C. Please refer to the original Service Manual (Order No.

MD0803034CE) for this mechanism.

Specifications

ORDER NO. MD0806017CE

Recording file format MP3 (*.mp3)

IGENERAL

Power supply AC 230 to 240 V, 50 Hz

Power consumption 85 W

Dimensions (W x H x D) 175 mm x 240 mm x 349.8 mm

Mass 4.5 kg

Operating temperature range 0°C to +40°C

Operating humidity range 35 to 80% RH (no condensation)

1 Safety Precautions 3

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices 5

3 Precaution of Laser Diode 6

4 Handling Precautions for Traverse Unit 7

5 Handling the Lead Free Solder 9

6 Operation Procedures 10

7 Self diagnosis and special mode setting 12

8 Assembling and Disassembling 17

9 Assembling and Disassembling of CD Mechanism Unit 39

10 Service Fixture and Tools 42

Power consumption in standby

mode

0.7 W (Approximate)

Note:

1. Specifications are subject to change without notice.

Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum

analyzer.

ISystem: SC-PMX3GN-S Music center: SA-PMX3GN-S

Speakers: SB-PMX3EG-K

11 Service Position 43

12 Voltage Measurement & Waveform Chart 48

13 Wiring Connection Diagram 57

14 Block Diagram 59

15 Notes Of Schematic Diagram 65

16 Schematic Diagram 67

17 Printed Circuit Board 81

18 Illustration of IC’s, Transistors and Diodes 87

19 Terminal Function of IC’s 88

20 Exploded Views 91

21 Replacement Parts List 93

CONTENTS

Page Page

SA-PMX3GN

1.1.2. Leakage Current Hot Check

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, ensure that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

3. After servicing, check for leakage current checks to prevent 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. Using an ohmmeter measure the resistance value, 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 5.2Ω.

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

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 milliamp. should the measurement is outside of the limits

specified, there is a possibility of a shock hazard, and the equipment should be repaired and re-checked before it is returned

to the customer.

Figure 1

SA-PMX3GN

1.2. Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C2602, C2641, C2642, C5015, C5016, C5110, C5916, C5917 and

C5938 through a 10Ω, 1W resistor to ground.

DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.

After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

• Current consumption at AC 230-240 V, at 50 Hz in NO SIGNAL mode (at volume min) should be ~300 mA.

1.3. Protection Circuitry

The protection circuitry may have operated if either of the following conditions are noticed:

• No sound is heard when the power is turned on.

• Sound stops during a performance.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are

"shorted", or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.

If this occurs, follow the procedure outlines below:

1. Turn off the power.

2. Determine the cause of the problem and correct it.

3. Turn on the power once again after one minute.

Note:

When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

1.4. Safety Part Information

Safety Parts List:

There are special components used in this equipment which are important for safety.These parts are marked by in the

Schematic Diagrams & Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer’s

specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer.

Table 1

Reference No. Part No. Part Name & Description Remarks

A2 K2CJ2DA00008 AC CORD [M]

JK5970 K2AA2B000017 AC INLET [M]

T5900 G4CYAYY00174 POWER TRANSFORMER [M]

T5901 G4CYAYY00137 SUB-TRANSFORMER [M]

F5970 K5D162BLA013 FUSE [M]

L5970 ELF15N035AN LINE FILTER [M]

RL5970 K6B1AEA00003 POWER RELAY [M]

Z5970 ERZVA5Z471 ZENER [M]

FP5920 K5G402AA0002 FUSE PROTECTOR [M]

FP5922 K5G202AA0002 FUSE PROTECTOR [M]

22 RFKHAPMX3GNS REAR CABINET ASS´Y [M]

21 RKMX0142-S TOP CABINET [M]

PCB1 REPX0633A TRANSFORMER P.C.B. [M] (RTL)

301 RAEX0190Z-V TRAVERSE UNIT [M] (RTL)

SA-PMX3GN

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by 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-equiped 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 equiped with ES devices, place the assembly on a conductive surface such as aluminium

foil, to prevent electrostatic charge build up 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 remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can

generate electrical charge 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, aluminium 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 body 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 (ESD) sufficient to

damage an ES device).

SA-PMX3GN

3 Precaution of Laser Diode

CAUTION :

This product utilizes a laser diode with the unit turned "on", invisible laser radiation is emitted from the pickup lens.

Wavelength: 785 nm (CD)

Maximum output radiation power from pickup: 100 µW/VDE

Laser radiation from the pickup unit is safety level, but be sure the followings:

1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous.

2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.

3. Do not look at the focus lens using optical instruments.

4. Recommend not to look at pickup lens for a long time.

SA-PMX3GN

4 Handling Precautions for Traverse Unit

The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be

taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.

4.1. Cautions to Be Taken in Handling the Optical Pickup Unit

The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.

Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.

1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.

2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed should

be short-circuited with a short pin or a clip.

3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.

4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible

cable, cut off the antistatic FPC.

4.2. Grounding for electrostatic breakdown prevention

Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static

electricity in the working environment. Proceed servicing works under the working environment where grounding works is

completed.

4.2.1. Worktable grounding

1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

SA-PMX3GN

4.2.2. Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity form your body.

SA-PMX3GN

5 Handling the Lead Free Solder

5.1. 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%

SA-PMX3GN

6 Operation Procedures

6.1. Main Unit Key Buttons Operation

SA-PMX3GN

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