Panasonic SAVK-90 Service manual

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 trouble cause

13.2 Diagnosis of Optical Pick-up Unit

14 Optical Pickup SelfDiagnosis and Replacement Procedure

Service Manual

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ORDER NO. MD0308338C3

DVD Stereo System

● SA-VK90DGCP

Colour

(S)... Silver Type

Specifications

AMPLIFIER SECTION

RMS Output power both channel driven: 10% Total Harmonic Distortion 1 kHz Front-HI CH

80 W per channel (6Ω)

100 Hz Front-LOW CH

60 W (12Ω)

1 kHz Surround CH

40 W per channel (8Ω)

1 kHz Center CH

100 W (8Ω)

100 Hz Subwoofer CH

100 W per channel (6Ω)

Total RMS Dolby Digital Mode Power

600 W PMPO Output Power 7000 W Input sensitivity/Input Impedance AUX

250 mV, 13.3 kΩ

MIC

0.7 mV, 680Ω

FM TUNER SECTION

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 SelfDiagnosis Function and Displaying Method

15.2.2 Re-Display

15.3 Mode Table 1

15.4 DVD / CD SelfDiagnosis 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

Frequency range 87.50 - 108.00 MHz (50 kHz steps) Sensitivity 2.5•V (IHF) S/N 26 dB 2.2•V Antenna terminals

75Ω (unbalanced)

Preset station 15

AM TUNER SECTION

Frequency range 522 - 1629 kHz (9 kHz steps)

520 - 1630 kHz (10 kHz steps)

AM sensitivityy S/N 20 dB at 1000 kHz

560•V/m Preset station 15

CASSETTE DECK SECTION

Track system 4 track, 2 channel Heads Record/playback Solid permalloy head Erasure Double gap ferrite head Motor DC servo motor Recording system AC bias 100 kHz Erasing system AC erase 100 kHz Tape speed 4.8 cm/s (1 7/8 ips) Overall frequency response (+3 dB, -6 dB at DECK OUT) Normal (TYPE I) 35 Hz - 14 kHz S/N ratio 50 dB (A weighted) Wow and flutter 0.18% (WRMS) Fast forward and rewind time Approx. 120 seconds with

C-60 cassette tape

Disc SECTION

Disc DVD-Video/Audio

8 cm/12 cm, single/double-sided, single/double-layer DVD-RAM/R (DVD-Video formatted discs) CD-DA/VCD/MP3/WMA 8 cm/12 cm, CD-R/RW SVCD (Conforming to IEC62107) HighMAT Level 2 (Audio and Image) JPEG-Exif Ver 2.1 JPEG Baseline files Video Signal system NTSC Output level Composite video

1 Vp-p (75Ω)

S-Video Y

1 Vp-p (75Ω)

S-Video C

0.286 Vp-p (75Ω)(NTSC)

Component video

1 Vp-p (Y)(75Ω)

0.7 Vp-p (PB/CB PR/CR)(75Ω)

Audio Sampling frequency CD 44.1 kHz MP3 32 kHz, 44.1 kHz, 48 kHz

Display

17 Operation Checks and Component Replacement Procedures

17.1 Disassembly of Top

Cabinet

17.2 Disassembly for the

DVD changer ass ’ y

17.2.1 Disassembly for the

Top Ornament Unit

17.2.2 Disassembly for

DVD changer unit

17.3 Checking for the changer unit operational condition

17.3.1 Initial setting of CD

17.3.2 Checking for the

DVD Module (1) P.C.B.

17.3.3 Checking for Panel P. C.B., Deck P.C.B. and LED P. C.B.

17.3.4 Replacement of the Power Amplifier IC

17.4 Main Component

Replacement Procedures

17.4.1 Replacement of the Traverse Deck

17.5 Replacement for the disc tray

17.6 Disassembly and reassembly for mechanism base drive unit

17.7 Replacement for the motor ass ’ y

17.8 Replacement for the pinch roller ass ’ y and head block

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

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

17.11 Replacement for the cassette lid ass ’ y

17.12 Measure for tape trouble

18 Measurements and

DVD-Video 48 kHz, 96 kHz DVD-Audio 192 kHz MP3 Birate 32- 320 kbps Decoding 16/20/24 bit linear Number of channels

5.1 CH (FL, FR, SL, SR, C, SW) Frequency response 20 Hz- 20 kHz (+1, -2 dB) Pick up Beam Source Semiconductor Laser Wavelength DVD 658 nm CD/VCD 780 nm Wow and flutter Less than possible measurement data Digital filter 8 fs D/A converter Delta sigma DAC

GENERAL

Power supply AC 110/127/220-230/240 V, 50/60Hz Power consumption 313 W Power consumption in standby mode:

0.9 W Dimwnsions (W x H x D) 250 x 330 x 370 mm Mass 10 kg

SYSTEM

SC-VK90D(GCP) Music Center: SA-VK90D(GCPS)

Front Speaker: SB-VK90(GC-S) x 2

Subwoofer: SB-WVK80(GC-S) x 2

Speaker System: SB-PT810(GC-s) x 1 Center Speaker: SB-PC810(GC-S) x 1

Surround Speaker: SB-PS810(GC-S) x 2

Notes:

1. Specifications are subject to change without notice. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

Adjustments

18.1 Cassette Deck Section

18.1.1 Head Azimuth

Adjustment (Deck 1 / 2)

18.1.2 Tape Speed

Adjustment (Deck 1 / 2)

18.1.3 Bias and Erase

Voltage Check

18.1.4 Bias Frequency

Adjustment (Deck 1 / 2)

18.2 Tuner Section

18.2.1 AM-IF Alignment

18.2.2 AM RF Adjustment

18.3 Alignment Points

18.3.1 Cassette Deck

Section

18.3.2 Adjustment Point 19 Illustration of ICs,

Transistors and Diodes

20 Terminal Function of IC

20.1 IC600 (C2BBHF000070 ) System Microprocessor

21 Block Diagram

22 Schematic Diagram

22.1 (A) DVD Module (1) Circuit

22.2 (B) DVD Module (2) Circuit

22.3 (C) Main Circuit & (D) Tuner Extent Circuit

22.4 (E) Panel Circuit, (F) LED Circuit & (G) Tact Switch Circuit

22.5 (H) Tuner Circuit

22.6 (J) Deck Circuit & (K) Deck Mechanism Circuit

22.7 (L) Power Supply Circuit

22.8 (M) Power AMP Circuit

22.9 (N) Power Circuit

22.10 (O) Transformer Circuit, (P) AC Inlet Circuit, (Q) Voltage Selector Circuit, (R) CD Loading Circuit, (S) CD Detect Circuit, (T) Spindle Position Circuit

23 Printed Circuit Board

23.1 (A) DVD Module (1) P.

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C.B. (Component & Foil Side)

23.2 (B) DVD Module (2) P. C.B. (Side A & B)

23.3 (C) Main P.C.B.

23.4 (D) Tuner Extent P.C. B. , (F) LED P.C.B. (I) Tuner Pack P.C.B., (R) CD Loading P.C.B., (T) Spindle Position P. C.B. & (S) CD Detect P.C.B.

23.5 (E) Panel P.C.B.

23.6 (G) Tact Switch P.C.B. & (H) Tuner P.C.B.

23.7 (J) Deck P.C.B. & (K) Deck Mechanism P.C.B.

23.8 (L) Power Supply P.C. B. & (M) Power AMP P.C.B.

23.9 (N) Power P.C.B.

23.10 (O) Transformer P.C. B.

23.11 (Q) Voltage Selector P.C.B. & (P) AC Inlet P.C.B.

24 Wiring Connection

Diagram

25 Parts Location and

Replacement Parts List

25.1 Deck Mechanism

(RAA3412-S)

25.1.1 Deck Mechanism Parts Location

25.1.2 Deck Mechanism Parts List

25.2 CD Loading

Mechanism (RD-DAC036-S)

25.2.1 CD Loading Mechanism Parts Location

25.2.2 CD Loading Mechanism Parts List

25.3 Cabinet

25.3.1 Cabinet Parts Location

25.3.2 Cabinet Parts List

25.4 Electrical Parts List

25.5 Packing Materials & Accessories Parts List

25.6 Packaging

Service Manual

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ORDER NO. MD0308338C3

DVD Stereo System

● SA-VK90DGCP

Colour

(S)... Silver Type

Specifications

AMPLIFIER SECTION

RMS Output power both channel driven: 10% Total Harmonic Distortion 1 kHz Front-HI CH 100 Hz Front-LOW CH 1 kHz Surround CH 1 kHz Center CH 100 Hz Subwoofer CH Total RMS Dolby Digital Mode Power

80 W per channel (6Ω)

60 W (12Ω)

40 W per channel (8Ω)

100 W (8Ω)

100 W per channel (6Ω)

600 W PMPO Output Power 7000 W Input sensitivity/Input Impedance AUX MIC

FM TUNER SECTION

Frequency range 87.50 - 108.00 MHz (50 kHz steps) Sensitivity 2.5•V (IHF) S/N 26 dB 2.2•V Antenna terminals Preset station 15

AM TUNER SECTION

Frequency range 522 - 1629 kHz (9 kHz steps)

AM sensitivityy S/N 20 dB at 1000 kHz

Preset station 15

CASSETTE DECK SECTION

Disc SECTION

Disc DVD-Video/Audio

DVD-RAM/R (DVD-Video formatted discs) CD-DA/VCD/MP3/WMA 8 cm/12 cm, CD-R/RW SVCD (Conforming to IEC62107) HighMAT Level 2 (Audio and Image)

75Ω (unbalanced)

520 - 1630 kHz (10 kHz steps)

8 cm/12 cm, single/double-sided, single/double-layer

250 mV, 13.3 kΩ

0.7 mV, 680Ω

560•V/m

C-60 cassette tape

JPEG-Exif Ver 2.1 JPEG Baseline files Video Signal system NTSC Output level Composite video S-Video Y S-Video C Component video

Audio Sampling frequency CD 44.1 kHz MP3 32 kHz, 44.1 kHz, 48 kHz DVD-Video 48 kHz, 96 kHz DVD-Audio 192 kHz MP3 Birate 32- 320 kbps Decoding 16/20/24 bit linear Number of channels

Frequency response 20 Hz- 20 kHz (+1, -2 dB) Pick up Beam Source Semiconductor Laser Wavelength DVD 658 nm CD/VCD 780 nm Wow and flutter Less than possible measurement data Digital filter 8 fs D/A converter Delta sigma DAC

GENERAL

Power supply AC 110/127/220-230/240 V, 50/60Hz Power consumption 313 W Power consumption in standby mode:

Dimwnsions (W x H x D) 250 x 330 x 370 mm Mass 10 kg

0.286 Vp-p (75Ω)(NTSC)

0.7 Vp-p (PB/CB PR/CR)(75Ω)

5.1 CH (FL, FR, SL, SR, C, SW)

1 Vp-p (75Ω) 1 Vp-p (75Ω)

1 Vp-p (Y)(75Ω)

0.9 W

SYSTEM

SC-VK90D(GCP) Music Center: SA-VK90D(GCPS)

Front Speaker: SB-VK90(GC-S) x 2

Subwoofer: SB-WVK80(GC-S) x 2

Speaker System: SB-PT810(GC-s) x 1 Center Speaker: SB-PC810(GC-S) x 1

Surround Speaker: SB-PS810(GC-S) x 2

Notes:

1. Specifications are subject to change without notice. Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

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1 Before Use

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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.)

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2 Before Repair and Adjustment

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Disconnect AC power, discharge Power Supply Capacitors C531~C534, C588~C589, C598~C599 and C954 through a 10Ω, 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 (vol. min, at CD mode) & AC 240 V, 50 Hz should be ~770mA and ~370mA respectively.

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3 Protection Circuitry

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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.

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4 Safety Precautions

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4.1 General Guidelines

4.1.1 Leakage Current Cold Check

4.1.2 Leakage Current Hot Check (See Figure 1)

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4.1 General Guidelines

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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)

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4.1.1 Leakage Current Cold Check

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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

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4.1.2 Leakage Current Hot Check (See Figure 1)

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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 0.15•F capacitor, 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 out ofthe 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.

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

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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 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, 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).

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6 Handling the Lead-free Solder

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6.1 About lead free solder (PbF)

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6.1 About lead free solder (PbF)

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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.

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7 Cautions to be taken when handling Optical Pickup

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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

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7.1 Handling Optical Pickup

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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 shortcircuit 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

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7.2 Replacing Precautions for Optical Pickup Unit

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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 a short clip and be sure to check that the short land is open, beforeconnecting. (Please remove solder, when the short land shortcircuits.)

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7.3 Grounding for Preventing Electrostatic Destruction

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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

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8 Precaution of Laser Diode

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Caution :

This product utilizes a laser diode with the unit turned "ON", invisible laser radiation is emitted from the pick up lens. Wavelength : 780 nm(VCD/CD)/658 nm(DVD) Maximum output radiation power from pick up : 100 •W/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.

ACHTUNG :

Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit abgestrahlt. Wellenlänge : 780 nm(VDC/CD)/658 nm(DVD) Maximale Strahlungsleistungder Lasereinheit :100•W/VDE Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:

1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.

2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.

3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.

4. Nicht über längere Zeit in die Fokussierlinse blicken.

ADVARSEL :

I dette a apparat anvendes laser.

CAUTION!

THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Use of Caution Labels

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9 Accessories

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Remote Control

AC power supply cord

FM indoor antenna

AM indoor antenna

Video cable

Power plug adaptor

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10 Operation Procedures

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11 Disc information

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12 About HighMAT

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12.1 What is HighMAT?

12.2 Why use HighMAT?

12.3 The advantages of using HighMAT

12.4 Outline of the HighMAT standard

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