Panasonic SA-VK91DGC Service Manual

DVD Stereo System

SA-VK91DGC SA-VK91DGS

Colour

(S)... Silver Type

ORDER NO. MD0407367C3

Specifications

n AMPLIFIER SECTION

RMS Output Power : Dolby Digital Mode

Front - High Ch

90 W per channel (6 Ω), 1 kHz, 10% THD

Front - Low Ch

45 W per channel (12 Ω), 100 Hz, 10% THD

Surround Ch

45 W per channel (6 Ω), 1 kHz, 10% THD

Center Ch

100 W per channel (6 Ω), 1 kHz, 10% THD

Subwoofer

95 W per channel (6 Ω), 100 Hz, 10% THD

Total RMS Dolby Digital mode power

650 W

PMPO output power 7300 W

n FM/AM TUNER, TERMINALS SECTION

Preset station FM 15 stations

AM/MW 15 stations

Frequency Modulation (FM)

Frequency range 87.50 - 108.00 MHz (50 kHz step)

Sensitivity 2.5µV (IHF)

S/N 26dB 2.2µV

ntenna terminals 75Ω (unbalanced)

mplitude Modulation (AM/MW)

Frequency range 522 - 1629 kHz (9 kHz step)

520 - 1630 kHz (10 kHz step)

M sensitivity S/N 20 dB at 1000 kHz

560µV/m

udio performance (Amplifier)

Input sensitivity/Input impedance

ux 250 mV, 20 kΩ

Phone jack

Terminal Stereo, 3.5 mm jack

Mic jack Sensitivity 0.7 mV, 600 Ω

Terminal Mono, 6.3 mm jack (2 system)

n CASSETTE DECK SECTION

Type Auto Reverse

Track system 4 Track, 2 Channel

Head Record/Playback Solid Permalloy Head

Erasure Double Gap Ferrite Head

Motor DC Servo Motor

Recording System AC Bias 100 kHz

Erase System AC Erase 100 kHz

Tape Speed 4.8 cm/s

Overall Frequency Response (+3, -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

n DISC SECTION

Disc played [8 cm or 12 cm]

(1) DVD-RAM (DVD-VR compatible, JPEG formatted disc)

(2) DVD-Audio

SA-VK91DGC / SA-VK91DGS

(3) DVD-Video

(4) DVD-R (DVD-Video compatible)

(5) CD-Audio (CD-DA)

(6) Video CD

(7) SVCD (Conforming to IEC62107)

(8) CD-R/CD-RW (CD-DA, Video CD, SVCD, MP3, WMA, JPEG formatted disc)

(9) MP3/WMA*

· Compatible compression rate:

MP3: between 32 kbps and 320 kbps

WMA: between 48 kbps and 192 kbps

(10) JPEG*

· Exif Ver 2.1 JPEG Baseline files

· Picture resolution: between 320x240 and 6144x4096 pixels

(Sub sampling is 4:2:2 or 4:2:0)

(11) HighMAT Level 2 (Audio and Image)

· The total combined maximum number of recognizable audio and

picture contents and groups: 4000 audio and picture contents and 400 groups.

Pick up

Wavelength (DVD/CD) 662 nm/785 nm

udio ouptut (Disc)

Number of channels 5.1ch(FL,FR,C,SL,SR,SW)

udio performance (measurement at: Line out terminal)

Frequency response

CD-Audio 4Hz-20kHz(+1,-2dB)

n VIDEO SECTION

Video system

Signal system PAL625/50, PAL525/60, NTSC

Composite video output Output level 1Vp-p(75Ω)

Terminal Pin jack (1 system)

S VIDEO output Y output level 1Vp-p(75Ω) C output level 0.3 Vp-p (75Ω)(PAL)

0.286 Vp-p (75Ω)(NTSC)

Terminal S terminal (1 system)

Component video output (480P/480I) Y output level 1Vp-p(75Ω)

output level 0.7 Vp-p (75 Ω)

Terminal

Pin jack (Y: green, PB:blue,PR:red)(1system)

n GENERAL

Power supply

AC 110V/127V/220-230V/240V, 50/60Hz

Power consumption 313 W

Power consumption in standby mode:

Dimensions (WxHxD) 250 x 330 x 372 mm

Mass 9.6 kg

Operating temperature range +5°Cto+35°C

Operating humidity range 5% to 90% RH (no condensation)

n SYSTEM

SC-VK91D (GC) Music Center: SF-VK91D (GC)

Front Speakers: SB-VK91D (GC)

Center Speaker: SB-PC81A (GC)

Surround Speakers: SB-PS81A

(GC) x 2

Subwoofers: SB-W VK91 (GC) x 2

SC-VK91D (GS) Music Center: SF-VK91D (GS)

Front Speakers: SB-VK91D (GC)

Center Speaker: SB-PC81A (GC)

Surround Speakers: SB-PS81A

(GC) x 2

Subwoofers: SB-W VK91 (GC) x 2

SF-VK91D GC-S consists of SA-VK91D GC-S & SB-PT81A GC-S

SF-VK91D GS-S consists of SA-VK91D GS-S & SB-PT81A GC-S

SB-PT81A GC-S consists of SB-PS81A GC (x 2) & SB-PC81A GC (x

SB-VK91D GC-S consists of SB-VK91 GC-S (x 2) & SB-WVK91 GCS(x2)

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.

CONTENTS

Page Page

1 Safety precautions

2 Before Use

3 Before Repair and Adjustment

4 Protection Circuitry

5 Safety Precautions

5.1. General Guidelines

6 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

7 Handling the Lead-free Solder

7.1. About lead free solder (PbF)

8 Cautions to be taken when handling Optical Pickup

8.1. Handling Optical Pickup

SA-VK91DGC / SA-VK91DGS

8.2. Replacing Precautions for Optical Pickup Unit 7

8.3. Grounding for Preventing Electrostatic Destruction

9 Precaution of Laser Diode

10 Accessories

11 Operation Procedures

12 Disc information

13 About HighMAT

13.1. What is HighMAT?

13.2. Why use HighMAT?

13.3. The advantages of using HighMAT

13.4. Outline of the HighMAT standard

14 Procedure for repairing the set

14.1. Distinguish the problem

14.2. Diagnosis of Optical Pick-up Unit

15 Optical Pickup Self-Diagnosis and Replacement Procedure

15.1. Self-diagnosis

15.2. Cautions to Be Taken During Replacement of Optical

Pickup and Spindle Motor

16 Self-Diagnosis Function

16.1. Automatic Displayed Error Codes

16.2. Memorized Error Codes

16.3. Mode Table 1

16.4. DVD/CD Self-Diagnosis Error Code Description

16.5. Error Codes Stored During No Play

16.6. Mode Table 2

16.7. Tray Lock Function

16.8. Things to Do After Repair

17 Cautions To Be Taken During Servicing

17.1. Recovery after the dvd player is repaired

17.2. DVD Player Firmware Version Upgrade Process

17.3. Firmware Version Upgrade Process by Using Disc and

Recovery Process

17.4. Using Recovery Disc

17.5. Total Usage Time Display

17.6. After replacement of DVD Module

18 Disassembly and Assembly of Main Component

18.1. Disassembly flow chart

18.2. Disassembly of Top Cabinet

18.3. Disassembly for DVD changer unit

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

P.C.B.

18.5. Disassembly of Main P.C.B., Speaker P.C.B., Sub Power

P.C.B., Power P.C.B., Transformer P.C.B. & Voltage

Selector P.C.B.

18.6. Replacement for traverse deck

18.7. Replacement for optical pickup unit (DVD mechanism)

18.8. Procedure for removing CD loading mechanism

18.9. CR16 mechanism disassembly procedure

18.10. CR16 MECHANISM ASSEMBLY PROCEDURE

18.11. Disassembly for Traverse Unit

18.12. Disassembly of Deck Mechanism Unit

18.13. Replacement for the cassette lid ass 馳

18.14. Counter-measure for tape trouble

19 Service Position

19.1. Checking Procedure

19.2. Checking the Main P.C.B., Speaker P.C.B., Power P.C.B.,

Sub Power P.C.B., Transformer P.C.B., Voltage Selector

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

19.3. Checking the Panel P.C.B., Tact P.C.B., Mic P.C.B., Deck

P.C.B. & Deck Mechanism P.C.B.

20 Measurements and Adjustments

20.1. Cassette Deck Section

20.2. Tuner Section

20.3. Alignment Points

21 Block Diagram

22 Schematic Diagram

22.1. Optical Pickup Unit Circuit

22.2. (A) DVD Module Circuit

22.3. (B) Main Circuit

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

22.5. (F) Deck Circuit & (G) Deck Mechanism Circuit

22.6. (H) Power Circuit

22.7. (I) Sub Power Circuit

22.8. (J) Speaker Circuit

22.9. (K) Transformer Circuit, (L) AC Inlet Circuit, (M) Voltage

Selector Circuit & (N) CD Loading Circuit

23 Printed Circuit Board

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

23.2. (B) Main P.C.B.

23.3. (C) Panel P.C.B.

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

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

23.6. (H) Power P.C.B.

23.7. (I) Sub Power P.C.B. & (N) CD Loading P.C.B.

23.8. (J) Speaker P.C.B.

23.9. (K) Transformer P.C.B.

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

24 Wiring Connection Diagram

25 Illustration of ICs, Transistors and Diodes

26 Terminal Function of IC

26.1. IC6800 (C2CBJG000460) System Microprocessor

27 Parts Location and Replacement Parts List

27.1. Deck Mechanism (RAA3412-S)

27.2. DVD Loading Mechanism

27.3. Cabinet

27.4. Electrical Parts List

27.5. Packing Materials & Accessories Parts List

27.6. Packaging

102

104

106

107

109

110

112

113

115

116

117

118

119

121

122

123

125

126

128

129

132

136

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153

SA-VK91DGC / SA-VK91DGS

1 Safety precautions

2 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.)

3 Before Repair and Adjustment

Disconnect AC power, discharge Power Supply Capacitors C5815~C5818, C5829~C5830, C5835~C5836 and C5841 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 consum ption at AC 110/127/220~230V, 50/60 Hz in NO SIGNAL at (vol. min, in CD mode) should be as below:

AC 50/60Hz 110 V ~1200mA

127 V ~1100mA 220-230 V ~ 700 mA 240 V ~ 650 mA

4 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.

SA-VK91DGC / SA-VK91DGS

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speake r 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.

5 Safety Precautions

5.1. 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 expose d to shock hazards.

5.1.1. 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 cabine t 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 5.1

5.1.2. Leakage Current Hot Check

(See Figure 5.1)

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 capacitor, between each exposed metallic part on the set and a

good earth ground such as a water pipe, as shown in Figure 5.1.

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 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.

6 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

SA-VK91DGC / SA-VK91DGS

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 touchin g 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).

7 Handling the Lead-free Solder

7.1. 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).

· W hen 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.

SA-VK91DGC / SA-VK91DGS

8 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 destruction during repair.

8.1. 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. 8.1 and Fig. 8.2)

3. Do not handle flexible cables forcibly as this may cause snapping. Handle the parts carefully (Refer to Fig. 8.1)

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. 8.1)

Fig. 8.1

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

8.3. 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. 8.2)

2. Work place grounding

Place a conductive material (conductive sheet) or ironboard where optical pickup is placed. (Refer to Fig. 8.2)

Note :

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

Fig. 8.2

SA-VK91DGC / SA-VK91DGS

9 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(DVD)/785 nm(CD) 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.

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.

n Use of Caution Labels

10 Accessories

SA-VK91DGC / SA-VK91DGS

Remote

control

AC cord (For GS only)

AC cord (For GC & GS

only)

FM antenna

AM antenna

Video cable

SA-VK91DGC / SA-VK91DGS

11 Operation Procedures

SA-VK91DGC / SA-VK91DGS

12 Disc information

SA-VK91DGC / SA-VK91DGS

13 About HighMAT

13.1. What is HighMAT?

This word combines the abbreviations of Matsushita Electric Industrial Co. Ltd. and High Performance Media Access Technology, and is a trademark of Microsoft Corporation. The products with the HighMAT logo shown below are made according to the HighMAT standard.

HighMAT is a format that allows users to save digital contents such as photographs, audio, and images on a CD. This gives consistency in the way of reading data when general consumer products (such as DVD players) and PCs are used, and thus, it is easy to operate for the user.

13.2. Why use HighMAT?

Up to now, there was no harmonized standard from playing digital content stored in CD-ROM formats (including CD-R) on consumer products like DVD players.Therefore, we used to have problems such as follow:

· There was no common play list or attache d information on contents, which is called metadata.

· The data compression method differed according to the equipment.

· As the number of CD-ROMs recorded increased retrieved the contents became more difficult.

· Because display and operation methods were different depen ding on the equipment, the play order of the content on the same

disc could change.

13.3. The advantages of using HighMAT

Applying the HighMAT standard will solve the following problems and will improve usabili ty.

· It will create a common user interface for both PC and consumer products.

· Regardless of the types of consumer products, such as DVD players, portable CD players, car stereos, and micro computers,

a consistent way to pay for digital content will be created and it will make it easier to retrieve data.

SA-VK91DGC / SA-VK91DGS

· You can also play digital content on the disc, which was created in accordance with the HighMAT format with a conventional

CD-ROM player.

13.4. Outline of the HighMAT standard

1. Recording medium

· CD-R/CD-RW

· Supports ISO 9660 Level Expanded Joliet

· For multiple session

2. Support data format

· Level 1 player: WMA, MP3 (MPEG-1 Audio Layer 3)

· Level 2 player: WMA, MP3 (MPEG-1 Audio Layer 3), JPEG

· Level 3 player: WMA, MP3 (MPEG-1 Audio Layer 3), JPEG, WMV, MPEG4 (optional)

3. Limitation of data format

SA-VK91DGC / SA-VK91DGS

· W MA, MP3 (MPEG-1 Audio Layer 3) 64 kbps - 160.999 kbps, 44.1 KHz, stereo, fixed bit rate/ variable bit rate.

· W MA, V2 and above, excluding Lossless/Voice/Pro

· JPEG: Max 6M pixel, Maximum file size: 3 MB

4. Limitations regarding the number of files on the media, etc.

· Total numbe r of audio files: Maximum 450

· Total number of still picture files: Maximum 999

· Total number of animation files: Maximum 200

· Total number of directories: Maximum 400

· Length of a file name: Maximum 108 characters (Unicode)

· Total numbe r of play lists: Maximum 200

· Number of contents in the playlist: Maximum 900

5. Composition of HighMAT disc

· Menu: Classified for the navigation of the HighMAT digital contents. When menu selected, its submenu or the play list will

be display ed.

· Play list: A list in which one or more digital contents are arranged in order

· Group: Sub-divided group of a play list.

· Digital Contents: Audio, still picture and animation data.

14 Procedure for repairing the set

SA-VK91DGC / SA-VK91DGS

14.1. Distinguish the problem

How to distinguish the trouble

1. View mechanical part if visual damage occurred.

Confirm the movement of mechanical parts assembly

2. Diagnose if Optical Pickup Unit is faulty (refer to diagnosis of Optical Pickup Unit).

3. If mechanism and OPU are OK, it is P.C.B.

(tray ass’y, loading mechanism ass’y, etc.).

14.1.1. Troubleshooting Guide Part 1

Checking Points Possible Faults Possible Reasons Countermeasure

AC Inlet Circuit/Voltage Selector Circuit

1. Failure to power-up the main unit.

2. Power On switch

3. Intermittent Power supply to main unit.

· Wrong selection of AC

power to main unit.

· Voltage selector is faulty.

· AC inlet JK500 is faulty.

· AC Line filter L500 is

faulty.

· Power On switch broken.

· Check for connection. · If condition 1 to 4 as mentioned above is in good

· Replace of fuse if found faulty.

· Replace of voltage selector if found faulty.

· Replace of AC Inlet if found faulty or damaged.

· Replace AC Line filter is found faulty or damaged.

· Replace Power On button switch if necessary.

· If conditions as mentioned above is in good condition.

Check for wire connection. (W1/W2/W3/W4/W6/W7). If connection is good, please proceed to check for Transformer Circuit.

condition. Check for wire connection. (W1/W2/W3/W4/W6/W7). If connection is good, please proceed to check for Transforme r Circuit

Checking Points Possible Faults Possible Reasons Countermeasure

Transformer Circuit 1. No power supply

voltage to the Power Circuit from AC In.

Speaker Circuit 1. No supply voltage to

Power Supply Circuit from Transformer Circuit. (+VccL/+VccH/VccL/-VccH)

1. No supply voltage to Main & Power Supply Circuit from Transformer Circuit. (+VccL/+VccH/-VccL/VccH)

1. No supply voltage to Panel Circuit.

Sub Power Circuit 1. No output FL/FR

output signal.

Power Circuit 1. No +9V/-

9V/SW5V/8V/LED9V/M 010V Supply Voltage to Main Circuit.

2. No output SL/SR/C signal (Check for input signal before troubleshooting for IC5801.)

· Transformer no output

voltage.

· Power Line filter relay

RL502.

· D950 open circuit.

· Fuse F3/F4 blown.

· Rectifier Circuit problem.

· F5801/FP5802 open

circuit.

· Q5815/D5835 faulty. (-VP

voltage not sufficient to power FL display at - 30V)

· Q5816/D5839 faulty. (Sys

6V not sufficient to power micro-processor IC at 6V.

· No supply voltage to

IC5803. (+VccL/+VccH/VccL/-VccH/+Vd/-Vd).

· IC5802 problem. (Check

pin 2,8,9,10,11 for voltages)

· IC5801 problem. (Check

pin 1,2,5 for output signal)

· Replace of Transformer T501 if found faulty.

· Replace of Power Relay if found faulty.

· Replace fuse F3/F4 if found faulty.

· Replace D5832/D5831/D5846/D5847 if any is found to

be faulty or damage.

· Replace D5844 if found faulty.

· Replace FP5801/FP5802 of the same type as indicated

in the part-list if found faulty.

· Replace Q5815/D5835 if found faulty.

· Replace Q5816/D5839 if found faulty.

· Replace IC5803 if found faulty.

· Replace IC5802 if found faulty.

· Replace IC5801 if found faulty.

SA-VK91DGC / SA-VK91DGS

14.1.2. Troubleshooting Guide Part 2

Checking Points Possible Faults Possible Reasons Countermeasure

Deck Circuit 1. No PLAYBACK

(PB)/Rec signal.

2. Bias frequency.

3. No supply voltage (+B/M0+B)

Panel Circuit 1. FL No Display

2. Error codes

Main Circuit 1. Audio Signal (I/P &

O/P) problem.

2. Video Signal problem.

· IC1001 problem. (Check

pin 23/24 for PB input, pin 5/20 for PB output).

· Q1013/Q1012 shorted to

ground with no muting OFF.

· Q1020/Q1021 shorted to

ground with no muting OFF.

· L1002 /IC1004/

Q1004/Q1005 problem. Check level of bias frequency and oscillation.

· See section on Panel

Circuit.

· -Vp too low to power FL

display.

· FL Display Driver IC

problem. (IC6803)

· See section on error codes

(Micro-processor IC6800)

· Check for IC2815. · Replace IC2815 if faulty.

· Refer to below section.

· Replace IC1001 if necessary.

· Replace Q1013/Q10 12 if necessary.

· Replace Q1020/Q10 21 if necessary.

· Replace these components if necessary when level is

below specification.

· See section on Power Circuit.

· Replace IC6803 is faulty.

14.1.3. Checking of VIDEO COMPONENT OUTPUT

VIDEO

SIGNAL

Input Pin 5 (IC2809) Pin 3 (IC2809) Pin 14 (IC2809) Pin 12 (IC2809) Pin 8 (IC2809)

VIDEO

SIGNAL

Output Pin 24/25 (IC2809) Pin 32 (IC2809) Pin 17 (IC2809) Pin 19 (IC2809) Pin 21/22 (IC2809)

Y C CR/PR/R CB/PB/B PY/Y/G

Y C CR CB/PB/B PY

SA-VK91DGC / SA-VK91DGS

Terminal Defination (IC2809 - C9ZB00000377)

Pin No Pin Name Pin Description

21/22 PYOUT1/PYOUT2 Signal Output Terminal for luminance signal (progressive type) 17/19 CrOUT/CbOUT Signal Output Terminal for color-difference signal 32 COUT Signal Output Terminal for chroma signal 29/30 MIXOUT1/MIXOUT2 Signal Ouptut Terminal for Y/C Mix Signal 24/25 YOUT1/YOUT2 Signal Output Terminal for luminance signal (interlaced type) 3/12/14 CIN/CBIN/CRIN Input signal terminal for chroma signal and color difference 5/8 YIN/PYIN Input signal terminal for luminance signal

14.2. Diagnosis of Optical Pick-up Unit

SA-VK91DGC / SA-VK91DGS

How to distinguish Laser destruction/damage

Confirmation 1

Remove cover of mechanism block so that you will see the lens of optical pickup.

Confirm emission of laser at the moment when power switch is turned on.

If there is no laser emission, laser diode is faulty.

Confirmation 2

SA-VK91DGC / SA-VK91DGS

While press and hold “STOP” on main unit , press “Display” button on the remote controller. Unit display laser current on FL.

From the reading of display , you can judge if laser diode is damaged or not.

Reading on the right side should be less than 70. If reading is more than 70, laser is damaged.

How to confirm if Optical Pickup is OK

Confirmation 1

1. Confirmation of jitter value with test disc. (Refer below for how to check jitter)

2. Lens cleaning.

3. Reconfirm jitter value.

4. Perform tile adjustment. (Refer to tilt adjustment)

5. Reconfirm jitter value. (To confirm jitter value, while pressing “STOP” on main unit and “5” on remote controller.)

Unit display jitter value on FL.

Confirmation 2

If servo is very unstable due to optical error and you cannot confirm jitter value, clean the lens and check appearance of pick up unit (cutting coil of actuator, etc), then check circuitry.

SA-VK91DGC / SA-VK91DGS

15 Optical Pickup Self-Diagnosis and Replacement

Procedure

15.1. Self-diagnosis

This unit is equipped with the optical pickup self-diagnosis function and the tilt adjustment check function. Follow the procedure described below during repair in order to perform self-diagnosis and tilt adjustment effectively. Especially when “NO DISC” is displayed, be sure to apply the self-diagnosis function before replacing with an optical pickup. Replacement of optical pickup generally requires when the present value of laser drive exceeds 45 (DVD) or 45 (CD).

Note:

Start diagnosis within three minutes after turning on the power (as diagnosis fails when the unit becomes warm).

SA-VK91DGC / SA-VK91DGS

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

Before replacing the optical pickup and spindle motor, check a total usage time respectively. Follow the checking method described below.

Item Status and Key Function Display

Checking DVD, CD laser usage time With the unit stopped and no disc inserted,

press the.

button on the remote controller unit.

Checking spindle motor usage time With the unit stopped and no disc inserted,

press the

button on the remote controller unit.

Resetting DVD, CD laser usage time While the DVD and CD laser usage times are

displayed, press the and the unit.

Resetting spindle motor usage time While the spindle motor usage time is

displayed, press the and the unit.

button on the player and the

button on the player

button on the remote controller

button on the player

button on the remote controller

15.2.1. Cautions to be taken during replacement of optical pickup

Optical pickup could be damaged due to the static electricity discharged from human body. Wear proper protection gear against static electricity during optical pickup and its peripheral repair. (Refer to “Cautions to Be Taken When Handling Optical Pickup”.)

· Do not touch laser diode, actuator and their peripherals.

· Do not check laser diode with a tester and such. (The tester will be destroyed.)

· For short-circuiting or removing laser diode, the use of an anti-static soldering iron is recommended. (Recommended model:

HAKKO ESD product)

· Solder the land of the flexible cable in the optical pickup.

Note:

If an anti-static soldering iron is not available, short-circuit the terminal surface of the flexible cable and then the land using a clip or equivalent device.

T1_xxxx_yyyy xxxx(DVD), yyyy(CD): total time is displayed with a four-digit number by the ten hours.

T2_xxxx xxxxx: total time is displayed with a four-digit number by the ten hours.

T1_0000_0000

T2_0000

SA-VK91DGC / SA-VK91DGS

16 Self-Diagnosis Function

This unit is equipped with the self-diagnosis function, which display s an error when it occurs, for use during servicing.

16.1. Automatic Displayed Error Codes

16.1.1. Automatic Display Function

For a power unit error, the code is automatically display ed.

F61: Automatically displayed on the LCD of the player.

16.1.2. Re-Display

· For F61 Display

−

− When the code, F61 is displayed, the power is automatically turned off.

− −

−

− The code, F61 is displayed for three second s, and then the current time appears.

− −

−

− To retrieve the code, turn on the power button so that the code F61 appears, however, is switched to time display after three

− −

seconds, and the power is automatically turned off.

· For F76 Display

−

− The abnormalities is an output or the abnormalities in a power supply of POWER AMP IC.

− −

16.1.3. Description of Error Code

16.1.3.1. F61

· State, Condition

When the power is turned on, the unit is automatically turned off. The power does not turn on.

· Cause, Troubleshooting

Power circuit system failure and/or direct current flown to speaker terminal Identify the cause and replace with new parts.

16.2. Memorized Error Codes

16.2.1. Activating Self-Diagnosis Function and Displaying Method

1. Turn on the power.

2. Select DVD/CD function. With no DVD/CD inserted in the player, press and hold down the and press the “0” button on the remote control for at least two seconds in order to display “DVD_F_ _ _ ”.

3. Press the If several errors are detected, press the

button. If a memorized error is detected, the result of self diagnosis is displayed. (Ex.: T H15)

button to display each.

button for at least two seconds,

16.2.2. Re-Display

· Press the power button to turn off the power, and then turn on the power.

· The details of self diagnosis are stored in the unit memory.

To retrieve them, follow the procedure described the above, “Activating Self-Diagnosis Function and Displaying Method”.

16.3. Mode Table 1

Following modes are available with combinations of the pressed buttons on the player and on the remote controller unit.

Player Remote Controller Unit Usage

button

0 Error code display (Refer to the Item 16.4. DVD Error Code Description) 5 Tilt adjustment (Jitter) 6 Region number and broadcasting system check 8 Bulit-in program version check (Micro-P)

DISPLAY DVD laser drive current check

3 CD laser drive current check

PAUSE Writing of laser drive current value after replacement of optical pickup

(Do use this function only when optical pickup is replaced.) Initialization of the player (factory setting is restored.)

Used after replacement of micro-computer and its peripherals and printed circuit board.

SA-VK91DGC / SA-VK91DGS

16.4. DVD/CD Self-Diagnosis Error Code Description

Error Code State, Conditon Cause, Troublesh ooting

H15 The disc tray cannot be opened: it closes spontaneously. Disc tray open/close detection switch (S1001) failure. H16 The disc tray cannot be closed: it opens spontaneously.

Error Code Meaning Details

U. H. Error U11 Focus servo failure H01 Tray loading failure H02 Spindle servo failure (Spindle servo, DSC, SP motor, CLV servo failure) H03 Traverse motor failure H04 Tracking servo error H05 Seek timeout failure H06 Power supply error DSC system F500 DSC failure DSC stops due to servo failure.

F501 DSC not Ready failure Communication failure between DSC and system computer

F502 DSC Time out failure See F500. F503 DSC communication failure Communication failure (Result failure occurs after communication

F505 DSC Attention Error See F500. F506 Invalid media Disc is placed upside down; TOC is unreadable or invalid disc is

Disc Code F103 Ilegal highlight position Disc standard is possibly illegal when highlight is displayed. IIC Error F4FF Forced initialization failure (Time out) F880 Unsuitable task number When a message arrives from not existing task F890 A message is sent during AV task transmission During transmission of a message to AV task F891 Unable to transmit a message to AV task When transmission of a message to AV task starts F893 DVD Module problem Check for firmware version F894 EEPROM failure F895 Firmware compatibility problem Check for firm version for Main & DVD Module P.C.B. F897 Initialization is not done properly Follow proper steps for initialization & reset F8A0 Unsuitable message command When transmission of a message to AV task starts

(Check and replace)

(Startup, focus failure, etc.)

(No communication because DSC does not move)

command is transmitted.)

inserted.

16.5. Error Codes Stored During No Play

Error Code Meaning System Computer Item Setting Task Internal error in system

F0BF 6) Unable to replay due to physical layer

identification failure

F0C0 8) DVD: Unable to replay due to no DVD

Video/Audio/VR

F0C1 9) DVD: Prohibited due to illegal regional

code F0C2 A) DVD: No replay due to PAL system PCND_NOPLAY_PAL 0x90 DiscManager 0xD0C2 F0C3 B) DVD: All title replay prohibited in parental

setting F0C4 C) VCD: Prohibited due to PHOTO CD

format F0C5 D) VCD/CD: Prohibited due to CD-ROM

without CD-DA

PCND_NOPLAY_PHYSICAL 0x50 DriveManager 0xD0BF

PCND_NOPLAY_VIDEO 0x70 DiscManager 0xD0C0

PCND_NOPLAY_RCD 0x80 DiscManager 0xD0C1

PCND_NOPLAY_PTL 0xA0 DiscManager 0xD0C3

PCND_NOPLAY_PHOTOCD 0xB0 DiscManager 0xD0C4

PCND_NOPLAY_CDROM 0xC0 DiscManager 0xD0C5

computer

16.6. Mode Table 2

Following modes are available with combinations of the pressed buttons on the player and on the remote controller unit.

SA-VK91DGC / SA-VK91DGS

Item Operational

Condition and Key

Function

Jitter display While the player is

stopped and no disc is inserted, press and hold down the button on the player and the number button, “5” on the remote controller unit.

Error code display While the player is

stopped and no disc is inserted, press and hold down the button on the player and the number button, “0” on the remote controller unit.

Measurement of laser current electricity initialization value

While the player is stopped and no disc is inserted, press and hold down the button on the player and the

button on the remote controller unit.

Details Display TO Exit Mode

Jitter display Measures and displays jitter. Measurement is repeated every second. Read error counter starts at 0 at the mode setting, and increased by one as data read fails at target block. A small defect is allowed to correct by retry. Any possibility is counted as one increment. Repetitive errors after retry increase by two levels or more.

Error code display Displays the latest error code stored in EEPROM.

Measurement of laser current electricity initialization value Memorizes each initialization value of DVD and CD in EEPROM.

J*1xxx*2_yyy*3_zz

: Jitter display mode

: Jitter measurement value

: Read error counter

: Focus driving value

Values are shown to one decimal place in the decimal digit. Focus driving value is displayed in the hexadecimal digit.

DVDnn_F---

*nn: Error history *--: Error number

DVD 01 FOBF

LDO*1_013*2_032

: Laser current electricity

measurement mode

: DVD current electricity value

: CD current electricity value

Press the STOP or OPEN button.

Press the OPEN button.

Automatically exits the mode after five seconds.

Measurement of DVD laser current electricity

ADSC internal RAM display

While the player is stopped and no disc is inserted, press and hold down the button on the player and the DISPLAY button on the remote controller unit.

While the player is stopped and no disc is inserted, press and hold down the button on the player and the number button “1” or “2” on the remote controller unit.

Measurement of DVD laser current electricity Measures DVD laser current electricity and displays the result together with the initialization value stored in EEPROM. After measurement, DVD laser is lit till the power is turned off (or goes off when the primary power is turned off).

ADSC internal RAM display Reads and displays the RAM value inside ADSC. The address is renewed when the CLEAR key is pressed so that the values at eleven points appear.

Values are shown in the decimal digit. The above example indicates that the current electricity initialization value is 13mA at DVD laser and 32mA at CD laser when laser is turned on.

LDD*1_012*2_014

: DVD laser current electricity

measurement mode

: Current electricity initialization

value stored in EEPROM

: Present value of current

electricity

Values are shown in the decimal digit. The above example indicates that the current electricity initialization value is 12mA and its present value is 14mA.

A*1_FB0*2_0000

:ADSC internal RAM display

mode

: Address

: RAM value at displayed

address

Automatically exits the mode after five seconds.

Press the STOP or OPEN button.

Values are shown in the hexadecimal digit. The above example indicates that ADSC value at the address, FB0h is 0000h.

SA-VK91DGC / SA-VK91DGS

Item Operational

Condition and Key

Function

Measurement of CD laser current electricity

While the player is stopped and no disc is inserted, press and hold down the button on the player and the number button “3” on the remote controller unit.

User initialization While the player is

stopped and no disc is inserted, press and hold down the button on the player and the number button

on the remote

controller unit.

Region display While the player is

stopped and no disc is inserted, press and hold down the button on the player and the number button, “6” on the remote controller unit.

Firmware version display

While the player is stopped and no disc is inserted, press and hold down the button on the player and the number button, “7” on the remote controller unit.

Region and firmware display

While the player is stopped and no disc is inserted, press and hold down the button on the player and the number button, “8” on the remote controller unit.

Laser use time While the player is

stopped and no disc is inserted, press and hold down the button on the player and the

button on the remote controller unit.

Reset laser use time While the usage time 1

is displayed, press and hold down the button on the player and the

button on the remote controller unit.

Spindle use time While the player is

stopped and no disc is inserted, press and hold down the button on the player and the

button on the remote controller unit.

User reset While the player is

stopped and no disc is inserted, press “STOP” & “ENTER” on remote control.

Details Display TO Exit Mode

Measurement of CD laser current electricity Measures CD laser current electricity and displays the result together with the initialization value stored in EEPROM. After measurement, CD laser is lit till the power is turned off (or goes off when the primary power is

LDC*1_032*2_032

: CD laser current electricity

measurement mode

: Current electricity initialization

value stored in EEPROM

: Present value of current

electricity

Automatically exits the mode after five seconds.

turned off).

Values are shown in the decimal digit. The above example indicates the current electricity initialization value is 28mA and its present value is 26mA when laser is turned on.

User initialization

“INITIALIZE” The user setting recovers the factory setting.

Region display [srrrxxyzzzz]

Automatically exits the mode after five

s : Panecon model type

seconds. rrr : Panecon release number x : Syscon generation (45) y: Syscon model type zzz: Syscon release number

Firmware version display rrr*1_xx*2y*3zzz

: Panel computer release number

: System computer generation

: System computer model type

: System computer release

Automatically exits

the mode after five

seconds.

number

Region and firmware version display _r*1__xx*2y*3zzz

: Region number

: System computer generation

: System computer model type

: System computer release

Automatically exits

the mode after five

seconds.

number

Laser usage time Measures each for DVD and CD respectively.

T1_1234_5678

The numbers in the left show

Automatically exits

the mode after five

seconds.

usage time for DVD laser and those in the right for CD laser. The four-digit number is shown by the ten hours in the decimal digit. The number after 0000 is 9999.

Laser usage time reset Resets both for DVD and CD at once.

T1_0000_0000 Automatically exits

the mode after five

seconds.

Spindle motor usage time T2_1234

Automatically exits

the mode after five

The four-digit number is shown by

seconds.

the ten hours in the decimal digit. The number after 00000 is 99999.

Reset the unit. “DVD RESET” Automatically exits

the mode after five

seconds.

SA-VK91DGC / SA-VK91DGS

Item Operational

Reset spindle use time

Communication error display

Condition and Key

Function

While the usage time 2 is displayed, press and hold down the button on the player and the on the remote controller unit.

While the player is stopped and no disc is inserted, press and hold down the button on the player and the MENU button on the remote controller unit.

button

Usage time 2 reset Spindle motor usage time

Displays frequency of communication errors between system computer firm IC and mechanical computer IC during DVD module.

Details Display TO Exit Mode

T2_0000 Automatically exits

the mode after five seconds.

ERR_00/30 Automatically exits

the mode after five seconds.

16.7. Tray Lock Function

16.7.1. Setting

· Disc Lock Function

1. With the SELECTOR on DVD/CD and POWER ON, hold down the [ [POWER] KEY on the remote control for 3 seconds to enter to Lock mode A.[_ _ _LOCKED_] will be display ed for 3 seconds, and then current disc will begin playing.

2. In Lock mode A, the following key is disabled.

[OPEN/CLOSE]

· Operation Lock Function

1. With the SELECTOR on DVD/CD and POWER ON, hold down the [CD PLAY] KEY on the main unit, and then press the [POWER] KEY on the remote control for 3 seconds to enter Lock mode B.

[_ _ _ LOCKED_] will be displayed for 3 seconds, and the current disc will begin playing.

2. Lock mode B primarily controls the selector and disc operations, and disena bles for the following keys.

Note:

OPEN/CLOSE

button are invalid and the player displays “___LOCKED_” while the lock function mode is entered.

· Prohibiting operation of selector and disk

1. Select the DVD/CD function.

2. Press and hold down the

button on the player and the power button on the remote controller unit for at least three

seconds. (The message, “___LOCKED_” appears when the function is activated.)

Note:

The following buttons are invalid and the player displays “___LO CKED_” while the lock function mode is entered.

STOP] KEY on the main unit, and then press the

16.8. Things to Do After Repair

Follow the procedure described below after repair.

1. While the power is on, press the

2. Press the power button to turn off the power.

3. Unplug the power cable.

Note:

It is prohibited to unplug the power cable while the tray is opene d and to close the tray manually.

button to close the tray.

SA-VK91DGC / SA-VK91DGS

17 Cautions To Be Taken During Servicing

17.1. Recovery after the dvd player is repaired

· W hen Flash ROM or DVD Module P.C.B. is replaced, carry out the recovery processing to optimize the drive. Playback the

recovery disc to process the recovery automatically.

· Recovery disc (Product number=RFKZD03R005)

· Performing recovery

1. Load the recovery disc (Product number: RFKZD03R005) to the player and run it.

2. Recovery is performed automatically . When it is finished, a message appears on the screen.

3. Remove the recovery disc.

4. Turn off the power.

17.2. DVD Player Firmware Version Upgrade Process

Firmware of DVD player may upgrade to conform to improvement of its performance and quality including operational range, playability of non-standardized discs, etc. The version upgrade disc contains the recovery function, and the recovery disc is not necessary.

Note:

Version upgrade process cannot be complete if the AC power is cut off due to power failure and other occasions during the process. If this occurs, replace FLASH ROM IC and restart version upgrade. Version upgrade disc number is informed when ordered.

17.3. Firmware Version Upgrade Process by Using Disc and Recovery Process

· Recovery process

· Firmware version upgrade process

Both of the above procedures automatically start when the recovery disc is replayed.General CD-R disc allows version upgrade process and recovery process, making version upgrade through disc simple. Recovery process: Optimization process of player after replacement of FLASH ROM, EEPROM, or module circuit board Version upgrade process: Renewal of firmware for improvement of operational range and performance

17.3.1. Self-Diagnosis Function

· Total usage time display (spindle motor, DVD/CD laser)

· ADSC internal RAM display

· Others: Last error count......20 items

Efficiency of failure diagnosis is expected to improve by using the above functions together with the repair process.

[Purpose of Use]

Total usage time display: used for estimating a failure due to exhausted spindle motor, laser, or other parts.

ADSC internal RAM display : used for deciding servo system failure according to servo learning values.

17.4. Using Recovery Disc

17.4.1. Recovery Process

1. Insert the recovery disc (RFKZD03R005) to the player to replay.

2. The recovery process automatically starts, and a message of completion prompts on the screen.

3. Remove the disc.

4. Turn off the power.

17.4.2. Version Upgrade Process

1. Insert the recovery disc to the player to replay.

2. The version of player is automatically checked and prompts if necessary.

3. Select version upgrade process using the cursor keys on the remote controller unit. (Select YES or NO)

4. a. If YES is selected, the process starts.

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