Panasonic SC-TM72DV Manuale utente

Notas:

• Las especificaciones están sujetas a cambios sin previo aviso.

• Los pesos y las dimensiones son aproximados.

Modelo: SC-TM72DV

SC-TM72DV

SA-TM72DV

SB-VK81

SB-PS81

SB-PC81

SB-WVK81

Estéreo

Bafles

Surround

Central

Subwoofer

MODELO UNIDAD

Service Manual

90 W RCM por canal (6 ), 1 kHz, 10% DAT

45 W RCM por canal (6 ), 1 kHz, 10% DAT

90 W RCM por canal (6 ), 1 kHz, 10% DAT

90 W RCM por canal (6 ), 100 Hz, 10% DAT

POTENCIA DE SALIDA (AMPLIFICADOR)

SC-TM72DV

FRONTAL

SURROUND

CENTRAL

SUBWOOFER

AMPLIFICADOR

POTENCIA DE SALIDA:

CONSUMO DE POTENCIA:

ALIMENTACION:

SENSIBILIDAD AUX:

RANGO DE SINTONIA AM:

RANGO DE SINTONIA FM:

DIMENSIONES (BXHXL):

PESO:

SC-TM72DV

4800 W (P.M.P.O.)

215 W

127 V ca 10% 60 Hz

250 mV

520 - 1710 kHz (paso de 10 kHz)

87,5 - 108,0 MHz (paso de 0,1 MHz)

87,9 - 107,9 MHz (paso de 0,2 MHz)

250 mm x 330 mm x 372 mm

9.6 kg aprox.

Table Of Contents

COVER

1 Before Use

2 Before Repair and Adjustment

3 Protection Circuitry

4 Safety Precautions

4.1 General Guidelines

4.1.1 Leakage Current Cold Check

4.1.2 Leakage Current Hot Check (See Figure 1)

5 Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices

6 Handling the Lead-free Solder

6.1 About lead free solder (PbF)

7 Cautions to be taken when handling Optical Pickup

7.1 Handling Optical Pickup

7.2 Replacing Precautions for Optical Pickup Unit

7.3 Grounding for Preventing Electrostatic Destruction

8 Precaution of Laser Diode

9 Accessories

10 Operation Procedures

11 Disc information

12 About HighMAT

12.1 What is HighMAT?

12.2 Why use HighMAT?

12.3 The advantages of using HighMAT

12.4 Outline of the HighMAT standard

13 Procedure for repairing the set

13.1 Distinguish the problem

13.1.1 Troubleshooting Guide Part 1

13.1.2 Troubleshooting Guide Part 2

13.1.3 Checking of VIDEO COMPONENT OUTPUT

13.2 Diagnosis of Optical Pick-up Unit

14 Optical Pickup Self-Diagnosis and Replacement Procedure

14.1 Self-diagnosis

14.2 Cautions to Be Taken During Replacement of Optical Pickup and Spindle Motor

14.2.1 Cautions to be taken during replacement of optical pickup

15 Self-Diagnosis Function

15.1 Automatic Displayed Error Codes

15.1.1 Automatic Display Function

15.1.2 Re-Display

15.1.3 Description of Error Code

15.2 Memorized Error Codes

15.2.1 Activating Self-Diagnosis Function and Displaying Method

15.2.2 Re-Display

15.3 Mode Table 1

15.4 DVD / CD Self-Diagnosis Error Code Description

15.5 Error Codes Stored During No Play

15.6 Mode Table 2

15.7 Tray Lock Function

15.7.1 Setting

15.8 Things to Do After Repair

16 Cautions To Be Taken During Servicing

16.1 Recovery after the dvd player is repaired}

16.2 DVD Player Firmware Version Upgrade Process

16.3 Firmware Version Upgrade Process by Using Disc and Recovery Process

16.3.1 Self-Diagnosis Function

16.4 Using Recovery Disc

16.4.1 Recovery Process

16.4.2 Version Upgrade Process

16.5 Total Usage Time Display

16.6 After replacement of DVD Module

17 Disassembly and Assembly of Main Component

17.1 Disassembly flow chart

17.2 Disassembly of Top Cabinet

17.3 Disassembly for DVD changer unit

17.3.1 Disassembly of the DVD Module P.C.B.

17.4 Disassembly for Panel P.C.B., MIC P.C.B. & Tact Switch P.C.B.

17.4.1 Disassembly of Lid

17.5 Disassembly of Main P.C.B., Power P.C.B., , Power Amp P.C.B., Power Supply P.C.B., Transformer P.C.B. & Voltage

Selector P.C.B.

17.5.1 Disassembly of Power Amp P.C.B.

17.5.2 Disassembly of Power P.C.B.

17.5.3 Disassembly of Power Supply P.C.B.

17.5.4 Disassembly of Transformer P.C.B. & Voltage Selector P.C.B.

17.6 Replacement for traverse deck

17.7 Replacement for optical pickup unit (DVD mechanism)

17.8 Procedure for removing CD loading mechanism

17.9 CR16 mechanism disassembly procedure

17.9.1 Gear for servicing information

17.9.2 Replacement for the disc tray

17.9.3 Replacement for the traverse deck

17.9.4 Disassembly for CD loading unit

17.10 CR16 MECHANISM ASSEMBLY PROCEDURE

17.11 Disassembly for Traverse Unit

17.12 Disassembly of Deck Mechanism Unit

17.12.1 Replacement for the CD motor ass ’ y, capstan belt A, capstan belt B and winding belt

17.13 Replacement for the cassette lid ass ’ y

17.14 Counter-measure for tape trouble

18 Service Position

18.1 Checking Procedure

18.2 Checking the Main P.C.B., Power P.C.B., Power Supply P.C.B., Power Amp P.C.B., Transformer P.C.B., Voltage

Selector P.C.B. and AC Inlet P.C.B.

18.3 Checking the Panel P.C.B., Tact Switch P.C.B., Mic P.C.B., Deck P.C.B. & Deck Mechanism P.C.B.

19 Measurements and Adjustments

19.1 Cassette Deck Section

19.1.1 Head Azimuth Adjustment (Deck 1 / 2)

19.1.2 Tape Speed Adjustment (Deck 1 / 2)

19.1.3 Bias and Erase Voltage Check

19.1.4 Bias Frequency Adjustment (Deck 1 / 2)

19.2 Tuner Section

19.2.1 AM-IF Alignment

19.2.2 AM RF Adjustment

19.3 Alignment Points

19.3.1 Cassette Deck Section

19.3.2 Adjustment Point

20 Block Diagram

21 Schematic Diagram

21.1 Optical Pickup Unit Circuit

21.2 (A) DVD Module Circuit

21.3 (B) Main Circuit

21.4 (C) Panel Circuit , (D) Mic Circuit & (E) Tact Switch Circuit

21.5 (F) Deck Circuit & (G) Deck Mechanism Circuit

21.6 (H) Power Supply Circuit

21.7 (I) Power Amp Circuit

21.8 (J) Power Circuit

21.9 (K) Transformer Circuit, (L) AC Inlet Circuit, (M) Voltage Selector Circuit & (N) CD Loading Circuit

22 Printed Circuit Board

22.1 (A) DVD Module P.C.B. (Side: A & B )

22.2 (B) Main P.C.B.

22.3 (C) Panel P.C.B.

22.4 (D) Mic P.C.B. & (E) Tact P.C.B.

22.5 (H) Power Supply P.C.B.

22.6 (I) Power Amp P.C.B. & (N) CD Loading P.C.B.

22.7 (J) Power P.C.B.

22.8 (F) Deck P.C.B. & (G) Deck Mechanism

22.9 (K) Voltage Selector P.C.B.

22.10 (M) Voltage Selector P.C.B. & (L) AC Inlet P.C.B.

23 Wiring Connection Diagram

24 Illustration of ICs, Transistors and Diodes

25 Terminal Function of IC

25.1 IC6800 (C2CBJG000460) System Microprocessor

26 Parts Location and Replacement Parts List

26.1 Deck Mechanism (RAA3412-S)

26.1.1 Deck Mechanism Parts Location

26.1.2 Deck Mechanism Parts List

26.2 DVD Loading Mechanism

26.2.1 DVD Loading Mechanism Parts Location

26.2.2 DVD Loading Mechanism Parts List

26.3 Cabinet

26.3.1 Cabinet Parts Location

26.3.2 Cabinet Parts List

26.4 Electrical Parts List

26.5 Packing Materials & Accessories Parts List

26.6 Packaging

1 Before Use

Be sure to disconnect the mains cord before adjusting the voltage selector.

Use a minus(-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will

be used. (If the power supply in your area is 117V or 120V, set to the “127V” position.)

Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some

countries, the correct voltage is already set.)

2 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C5815~C5818, C5829~C5830, C5835~C5836 and C5841

through a 10? , 5W 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 110/127/220~230V, 50/60 Hz in NO SIGNAL at (vol. min, in CD mode) should be as below:

2.1 Rework Process for Main Board

Versión RJBX0405A-1

For Main PCB version 1 only (RJBX0405A-1), is necessary add two Axial resistors covered with a plastic tube in order

to countermeasure a Pop Noise during Tuner - Recording.

Be sure that during the usage of this PCB these components are included.

Material Required:

1.) 2 Axial Resistor , (ERDS2TJ123T)

2) 5 Cm Of Spaghetti , (W1VT)

3) 1g of Diabond , (DN83K)

Step1.

Prepare the axial resistors as showed in the Fig. 1

110 V ~ 1200 mA

127 V ~ 1100 mA

220-230 V ~ 700 mA

AC 50/60Hz

240 V ~ 650 mA

Step2. Locate soldering Points as showed in Fig.2

Step3. Solder the first resistor between W2346 and

(-)C2236 Fig3.

Step4. Solder the second resistor between W2346

and (-)C2139 Fig3.

Step 5. Add Diabond to fix the resistor to the PCB.

Fig.3

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.

4 Safety Precautions

4.1 General Guidelines

4.1.1 Leakage Current Cold Check

4.1.2 Leakage Current Hot Check (See Figure 1)

4.1 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.

4.1.1 Leakage Current Cold Check

4.1.2 Leakage Current Hot Check (See Figure 1)

4.1.1 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 1M? and 5.2M?.

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

Figure 1

4.1.2 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 1.5k? , 10 watts resistor, in parallel with a 0.15µF capacitor, betwee 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 out ofthe limits

specified, there is a possibility of a shock hazard, and the equipment should be repaire and rechecked before it is returned to

the customer.

5 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

transistorsand 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 semiconductorequiped 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, whichshould 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 orcomparable 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 todamage an ES device).

6 Handling the Lead-free Solder

6.1 About lead free solder (PbF)

Distinction of PbF P.C.B.:

P.C.B.s (manufactured) using lead free solder will have a PbF stamp on the P.C.B. 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.

In case of soldering iron with temperature control,please set it to 700 ± 20°F (370 ± 10°C).

• Pb free solder will tend to splash when heated too high (about 1100°F/600°C).

• When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the

soldering points with the Pb free solder until it melts enough.

7 Cautions to be taken when handling

Optical Pickup

The laser diode used inside optical pickup could be destroyed due to static electricity as a potential difference is caused by

electrostatic load discharged from clothes or human body.

Handling the parts carefully to avoid electrostatic destructionduring repair.

7.1 Handling Optical Pickup

7.2 Replacing Precautions for Optical Pickup Unit

7.3 Grounding for Preventing Electrostatic Destruction

7.1 Handling Optical Pickup

1. Do not impact on optical pickup as the unit structurally uses an extremely precise technology.

2. Short-circuit the flexible cable of optical pickup remove from the circuit board using a short-circuit pin or clip in order to

prevent laser diode from electrostatic destruction (Refer to Fig. 7.1 and Fig. 7.2)

3. Do not handle flexible cables forcibly as this may cause snapping. Handle the parts carefully (Refer to Fig. 7.1)

4. A new optical pickup is equipped with an anti-static flexible cable. After replacing and connecting to the flexible board, cut

the anti-static flexible cable. (Refer to Fig. 7.1)

Fig. 7.1

7.2 Replacing Precautions for Optical

Pickup Unit

DVD/CD Optical Pickup

The optical pickup by which part supply was carried out attaches the short clip to the flexible board for laser diode electrostatic

discharge damage prevention. Please remove the short clip and be sure to check that the short land is open, beforeconnecting.

(Please remove solder, when the short land short-circuits.)

7.3 Grounding for Preventing Electrostatic

Destruction

1. Human body grounding

Use the anti-static wrist strap to discharge the static electricity accumulated in your body. (Refer to Fig. 7.2)

2. Work place grounding

Place a conductive material (conductive sheet) or ironboard where optical pickup is placed. (Refer to Fig. 7.2)

Note :

Keep your clothes away from optical pickup as wrist strap does not release the static electricity charged in clothes.

Fig. 7.2

8 Precaution of Laser Diode

Caution :

This product utilizes a laser diode with the unit turned «ON», invisible laser radiation is emitted from the pick

up lens. Wavelength : 662 nm(CD)/785 nm(DVD) Maximum output radiation power from pick up : 100 µW/

VDE

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

1. Do not disassemble the optical pick up unit, since radiation from exposed laser

diode is dangerous.

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

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

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

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