JVC XVD-721-BK, XVD-723-GD Service manual

SERVICE MANUAL

DVD AUDIO/VIDEO PLAYER

XV-D721BK

XV-D721BK XV-D723GD

XV-D723GD

Area Suffix

XV-D721BK J

C EG ES EN EE

Area Suffix

XV-D723GD A

J EG ES EN UF

U.S.A

Canada

Germany

Spain

Northern Europe

Russian Federation

US Minitary

Australia

U.S.A

Germany

Singapore

Northern Europe

China

Brazil,Mexico,Peru

Contents

Safety Precautions Preventing static electricity Important for laser products Importance Admistering point on the Safety

This service manual is printed on 100% recycled paper.

1-2 1-3 1-4

1-5

Disassembly method Adjustment method Description of major ICs

1-6 1-11 1-18

No.A0002

Nov. 2000

1-1

XV-D721BK XV-D723GD

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

2. Alter ations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further relieve the manufacture of responsibility for personal injury or proper ty damage resulting therefrom.

3. Many electrical and mechanical par ts in the products have special safety-related characteristics.

These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement par ts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When ser vice is required, the or iginal lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet , particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)

Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter.

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Move the resistor connection to eachexposed metal part, par ticularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.).

0.15 F AC TYPE

1500 10W

Place this probe on each exposed metal part.

This corresponds to 0.5 mA AC (r.m.s.).

Good earth ground

1-2

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

XV-D721BK XV-D723GD

Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.1. Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed.

1.1.1. Ground the workbench

1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

1.1.2. Ground yourself

1. Use an anti-static wrist strap to release any static electricity built up in your body.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

1.1.3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

1.2. Handling the traverse unit (optical pickup)

1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

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XV-D721BK XV-D723GD

Important for Laser Products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able to function.

6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1 LASER PRODUCT

REAR

FRONT CENTER

LEFT

RIGHT

ANALOG

PCM/STREAM

DIGITAL

COAXIAL

OPTICAL

AUDIO OUT AV COMPU LINK

SUBWOOFER

VIDEO S-VIDEO

YPBP

COMPONENT

VIDEO OUT

SCAN MODE

525p 525i

CLASS 1 LASER PRODUCT

AC IN

CAUTION - - LASER RADIATION WHEN OPEN.

DO NOT STARE INTO BEAM.

ATTENTION RAYONNEMENT LASER EN CAS D’OUVERTURE.

NE PAS REGARDER DANS LE FAISCEAU.

- VORSICHT LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFENET. NICHT IN DEN STRAHL BLICKEN.

- ADVARSEL LASERSTRÅ LING VED Å BNING. SE IKKE IND I STRÅ LEN.

- ADVARSEL LASERSTRÅ LING NÅ R DEKSEL Å PNES. STIRR IKKE INN I STRÅ LEN.

VARNING LASERSTRÅ LNING NÄR DENNA DEL ÄR ÖPPNAD.

STRRA EJ IN I STRÅ LEN.

VARO! AVATTAESSA OLET ALTTIINA LASERSÄTEILYLLE.

ÄLÄ TUIJOTA SÄTEESEEN.

1-4

Importance Admistering point on the Safety

XV-D721BK XV-D723GD

Note : It's means "J" for U.S.A. market model and "C" for canada market model.

XV-D721BK/XV-D723GD C/J ONLY

Full Fuse Replacement Marking

Graphic symbol mark (This symbol means fast blow type fuse.)

should be read as follows ;

FUSE CAUTION

FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ;

F901 : 1.6 A / 125 V

XV-721BK/XV-723GD C/J SEULEMENT

Marquage Pour Le Remplacement Complet De Fusible

Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.)

doit etre interprete comme suit ;

PRECAUTIONS SUR LES FUSIBLES

POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES D'INCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;

F901 : 1.6 A / 125 V

1-5

XV-D721BK XV-D723GD

Disassembly method

< Main body>

Removing the top cover (See Fig.1)

Remove the four screws A on each side of the body.

Remove the two screws B on the back of the body.

Remove the top cover from behind in the direction of the arrow while pulling the lower part of the sides.

Removing the rear panel (See Fig.2)

A 2

Top cover

Fig.1

Prior to performing the following procedure, remove the top cover.

Remove the sixteen screws C on the back of the body.

Removing the fitting (See Fig.3 to 5)

Prior to performing the following procedure, remove the top cover.

ATTENTION:

Lower the mechanism by moving the lever marked a in the direction of the arrow from the upside of the body (Refer to Fig.3).

Manually eject the loading tray toward the front.

Remove the fitting from the loading tray by releasing the joints b on the both sides of the fitting.

Push and return the loading tray.

To remove the front panel assembly and the DVD mechanism assembly, remove the fitting in advance.

Lever a

Fig.2

Rear panel

Loading tray

1-6

Joint b

Fitting

Joint b

Loading tray

Fig.3

Loading tray

Fig.4Fig.5

XV-D721BK XV-D723GD

Removing the front panel assembly

(See Fig.6 to 9)

Prior to performing the following procedure, remove the top cover and the fitting.

Disconnect the card wire from connector CN818 on the regulator board.

Turn back the body and remove the three screws D fixing the front panel assembly.

Release the two joints c on both sides of the body and remove the front panel assembly toward the front.

Regulator board

CN818

Front panel assembly

Fig.6

Front panel assembly

(Bottom)

Fig.7

Fig.8

Joint c

Fig.9

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XV-D721BK XV-D723GD

Removing the DVD mechanism

(See Fig.10)

Prior to performing the following procedure, remove the top cover and the fitting. It is not necessary to remove the front panel assembly.

Disconnect the card wire from connector CN816 and the harness from CN817 on the regulator board.

Disconnect the card wire from connector CN701 on the video board.

Disconnect the card wire from CN831 on the DSP board.

Remove the four screws E and the DVD mechanism assembly by pulling out from the front panel assembly backward.

Removing the regulator board

(See Fig.11 and 12)

Regulator board

CN816

CN817

Regulator board

Video board

CN701

DVD mechanism assembly

Fig.10

CN711 CN815

DSP board

CN831

Prior to performing the following procedure, remove the top cover. It is not necessary to remove the rear panel.

Disconnect the card wire from connector CN816 and CN818 and the harnesses from CN815,CN817 and CN711 on the regulator board.

Remove the three screws F attaching the regulator board.

Remove the two screws C on the rear panel.

CN816 CN817

CN818

Rear panel

Fig.11

Fig.12

1-8

XV-D721BK XV-D723GD

Removing the video board

(See Fig.13 and 14)

Prior to performing the following procedure, remove the top cover.

Ref. :

It is not necessary to remove the rear panel.

Disconnect the harnesses from the connector CN711 on the regulator board.

Disconnect the card wire from connector CN701 on the video board.

Remove the five screws C on the rear panel.

Removing the Audio board 1,2 and 3 / the Audio board (See Fig.13,15 and 16)

Prior to performing the following procedure, remove the top cover and rear panel.

Remove the three screws C attaching the audio board 1,2 and 3.

Regulator board

CN815

CN711

Video board

Fig.13

Rear panel

Fig.14

Audio board 3

CN701

Audio board 2

Audio board 1

Audio board CN831

Disconnect the audio board 1,2 and 3 from the audio board respectively.

Disconnect the harnesses from connector CN815 on the regulator board.

Disconnect the card wire from connector CN831 on the audio board.

Remove the two screws G attaching the audio board.

Audio board 1

Audio board 3

Audio board 2

Fig.15

Audio board

CN831

Fig.16

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XV-D721BK XV-D723GD

Removing the DVD servo board

(See Fig.17)

Prior to performing the following procedure, remove the top cover and the DVD mechanism assembly.

Turn over the DVD mechanism assembly and disconnect the card wire from connector CN102 and CN103 on the DVD servo board.

Remove the two screws H attaching the DVD servo board. Move the DVD servo board in the direction of the arrow to release the two corner joints d.

DVD mechanism board

CN103

Joint d Joint d

DVD servo board

Fig.17

CN102

Prior to performing the following procedure, remove the top cover and the front panel assembly.

Removing the FL board / the power switch board (See Fig.18 and 19)

Remove the eight screws I and three screws J on the back of the front panel assembly. Remove the FL board and the power switch board at the same time.

Disconnect the harness from connector CN903 on

the FL board.

FL board

Power switch board

Fig.18

Power switch board

CN903 FL board

1-10

Fig.19

XV-D721BK XV-D723GD

Adjustment method

This model has the TEST mode for simple diagnosis of the internal function. Use the TEST mode for diagnosing and checking the set as mentioned below.

Details of the TEST mode

The TEST mode comprises the five modes of the following.

FL indication (*: numeral)

1.DVD AUDIO copyright protection key serial indication Indicates the content of the DVD AUDIO copyright at shipment. Use this mode for checking it.

2.Microcomputer's version number indication Indicates the initial version number of the microcomputer at shipment. Use this mode for checking it.

3.Servo signal system check mode CHECK Use this mode for checking the laser pickup status.

4.Indication check mode The FL and LED's go on in full. The LED's and FL of the set go on in full. Use this mode for checking indications.

5.Microcomputer software upgrading mode UPGRADE Use this mode for upgrading the microcomputer software.

How to set the TEST mode

1.While pressing the STOP key and PLAY key of the set together, plug in the power cord.

*Continue to pressing both the STOP key and PLAY key until reading of disk data completes (until the "NOW READING"

message changes into a DVD logo).

2."TEST *" message appears on the FL. (* In the part of the sign, the sign is different according to the destination.)

3.The five modes of the TEST mode change one after another each time the DISPLAY OFF key of the set is pressed.

4.To recover the usual operation mode, turn off the set by pressing the POWER ON/OFF key.

********

**_**_**

How to check the laser pickup

Since the laser pickup of the set is easily affected by static electricity, heat, etc., it may be damaged depending on use

condition. If the set shows such a symptom as it fails in reading disk data, check the laser pickup as follows.

* Checking laser current

1.Enter the set into the "servo signal system check mode" of the TEST mode.

2.Press the SKIP | key of the set. The laser is turned on and the LAS **** message appears on the FL display. **** in the message indicates the current in code. For knowing the actual laser current, read the first two figures (omitting the last two figures) and convert the number into the current (mA) referring to the following conversion table, because the FL indication is a hexadecimal number. Since the FL indication varies because of self-heating of the set, read the indication value about 20 seconds after the set was turned on. If the indicated value is the OK level (see the conversion table), the laser is judged to be normal in the initial status by this simple checking method.

3. Press the STOP key to set back the check mode to the initial status.

Laser current conversion table

FL indication

Current (mA)

Judgment

FL indication

Current (mA)

Judgment

FL indication

Current (mA)

Judgment

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XV-D721BK XV-D723GD

* Automatic adjustment/Jitter value indication

1.Enter the set into the "servo signal system check mode" of the TEST mode.

2.Open the tray with the OPEN key of the set. Set the TEST disk VT-501 on the tray and put back the tray with the CLOSE key. Then, press the PAUSE key. The TEST disk starts rotation to execute automatic adjustment. If the set is in the normal condition, the "CHECK OK" message appears. If there is something abnormal in the adjustment values, an error message appears and it mostly comes from a failure in the servo system (including the mechanism and pickup). In such the event, refer to the check points by errors. When using the TEST disk VT-501, carefully check to see if there is neither damage nor dirt on the read surface of the disk beforehand.

3.Press the STOP key to return the check mode to the initial status.

4.After the automatic adjustment with the TEST disk completes, press the PLAY key. The disk starts rotation and a jitter value (signal read precision in percentage) appears on the FL display (JIT 0***). If the indication value (in *** places) is 110 (11 %) or less, it can be judged by this simple checking method that the signal read precision of the set is satisfactory. Before using the TEST disk VT-501, carefully check it if there is neither damage nor dirt on the read surface.

5.Press the STOP key to return the mode to the initial status.

Upgrading microcomputer software

The internally incorporated microcomputer software of this set can be revised in part for the reason that the set is designed to conform to new standards and to be capable of playing disks to be put on the market by other manufacturers. To upgrade the internal microcomputer software, use the upgrade disk and follow the procedure mentioned below.

* How to upgrade the microcomputer software

1.Set the upgrade disk in the set and enter it into the TEST mode.

2.After confirming that the set completes reading of the upgrade disk data while looking at the indication on the monitor screen, change the TEST mode to the microcomputer software upgrading mode and then press the PLAY key.

3.The set completes writing of the upgrade disk data approximately 1 minute later and it is automatically reset by the self-resetting function. Then the set again reads the upgrade disk and stops automatically.

4.Take the upgrade disk out of the set and turn it off with the POWER ON/OFF key.

5.Again enter the set into the TEST mode, and press the SKIP key and then the PAUSE key.

6.Make sure that the DVD AUDIO indicator goes on a few seconds after the above-mentioned operation, check the version number of the microcomputer software in the microcomputer software version number indication mode. *Carefully carry out the above procedure. If data write is interrupted in the middle of course by power failure or careless shutdown operation, not only the data of the internal software may be damaged but the set may fail in resetting. The version number of the internal microcomputer software is shown as follows.

FL indication: ** ** **

[IC901] [IC401] [IC508/IC509] Symbol number of microcomputer IC

Initializing the set

Initialization of the set returns it to the initial status at shipment. Be sure to initialize the set after repair service.

* How to initialize the set

1.Enter the set into the TEST mode and press the SKIP key first and the PAUSE key second.

2.Make sure that the DVD AUDIO indicator goes on a few seconds later.

DVD AUDIO copyright protection

To protect the DVD AUDIO copyright from infringement, a number proper to each DVD AUDIO set called a device key is assigned to each set. If a proper device key is not set for a set, it fails in playing a copyrighted disk. The management number of the device key of a set can be checked by the DVD AUDIO copyright protection

key serial indication in the TEST mode. If the "???...." message appears in this check mode, the set has a

failure in the device key. If it occurs, inquire at the Service Section of the Audio and Communication Division, JVC.

1-12

Check points for each error

(1) Spindle start error

*Defective spindle motor Are there 10ohms resistance between each pin of CN102 "1~4"? (The power supply is turned off and measured.)

*Hall element: Is sine wave output between CN102 "10" and "11", between "12" and "13", and between "14" and "15" during rotation?

In either case, replace the mechanical unit. *Defective spindle driver (IC251)

Is a driving wave output from CN102 "1~4" ?

During rotation

Is IC251 "9" at "H" level (START)? Servo IC --- Is control signal sent to the motor driver ?

IC201 "95" : Duty is 50% during stop, but varies during rotation (greatly varies at start).

--- If not sent, pattern or servo IC (IC201) is defective.

XV-D721BK XV-D723GD

R259 : approx 2.5V during stop, but varies during rotation (greatly varies at start).

--- of not sent, pattern or servo IC (IC201) is defective. Is FG input to servo IC ?

Observe FG wave from IC201 "89". --- If not output, pattern, IC251 or IC201 is defective.

(2) Disc Detection, Distinction error (no disc, no REFNV) * Laser is defective.

* Front End Processor is defective (IC101). * APC circuit is defective. --- Q101. * Pattern is defective. --- Lines for CN101 "15" and "17".

Lines for between IC201 "2" and IC101 "2"(LDONA),

between IC201 "3" and IC101 "1" (LDONB). * Servo IC is defective (IC201). * Is signal sent to IC201(servo)"71" AS2 ? * IC101 --- For signal from IC101 to IC301, is signal output from IC101 "88" (RFAS1) and

IC101 "69" REENV ?

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XV-D721BK XV-D723GD

(3) Traverse movement NG

* For automatic adjustment, traverse movement occurs only when the position is changed to retry judging the disc type after the 1st judgment resulted in an error. Therefore, traverse movement rarely occurs because, in most cases, disc judgment at the current position (1st time judgment) is executed successfully. (Of course, NG rarely occurs in this step.)

Note: 1st time judgment of disc type resulted in NG. --- The re-judgment of disc type may not be successful. Therefore, after removing the cause of traverse movement, re-execute automatic adjustment and confirm that no problem exists.

* Check point a) During stop

Whether 50% duty pulse is output to R273 Whether between R274 and C271 is at approx. 2.5VDC Offset voltage between CN102 "1" and "2" (scores mV if exists)

b) When tray is opened or closed

Check by oscilloscope whether a rectangular wave signal is output from CN102 "1" or "2".

50msec

2.5V

Approx.

500mV

GND

If checking a) or b) resulted in NG, IC201 maybe defective.

(4) Focus ON NG

* Is FE output ? --- Pattern, IC101 * Is FCDRV signal sent ? (R286) --- Pattern, IC301 * Is driving voltage sent ?

CN101 "1", "3" --- If NG, pattern, driver, mechanical unit (with the power turned off, measure the

resistance between CN101 "20" and "21").

* Does CN101 "8" become "H" and is the focus drawing in done?

--- Mechanical unit (laser power too low), IC101(defective gain)

--- Moreover, It is thought that abnormality is found in the disk.

* Mechanical unit is defective.

(5) Tracking ON NG

* When the tracking loop cannot be drawn in, IC201 "58" (/TRON) does not become "L". * Mechanical unit is defective.

Because the undermentioned adjustment value is abnormal, it is not possible to draw in normally.

* Periphery of driver (IC271)

Constant or IC it self is defective. (When passing without becoming abnormal while adjusting the following.)

* Servo IC (IC201)

When improperly adjusted due to defective IC.

1-14

[Focus position rough adjustment] [Phase difference cancellation rough adjustment] [Tracking balance adjustment]

XV-D721BK XV-D723GD

(6) Spindle CLV NG

* When the spindle cannot be shifted to CLV Servo, does not become "H" between IC201 "18" and IC301"88". * IC201 Is signal output from IC101 "87" (RFOP)? * IC201 Is signal output from IC201 "60" to "64" (binary-coded clock and data)? * IC201 Is "58" (/TRON) at "L" level ? * IC301 "74" to "76" --- Is signal output to IC201 "24", "25", "28" (In case of only CD).

(Serial communication of rotation information) * Spindle motor driver is defective. Even when one of the three phases is defective, item (1) may be passed.

--- Check the second item in (1) above. * C260 to C263 Defective soldering If noise eliminating capacitors are not properly soldered, noise may ride on the waveform. * Besides, the undermentioned cause is thought though specific of the cause is difficult because various factors are thought.

Mechanism is defective.(jitter) IC101, IC201.

(7) Address read NG

* Besides, the undermentioned cause is thought though specific of the cause is difficult because various factors are thought.

Mechanism is defective. (jitter) IC201, IC301, IC401. The disc is dirty or the wound has adhered.

(8) Between layers jump NG (double-layer disc only)

* When the focus flight is generated when jumps between layers. Because all adjustments for L1 layer must be successful, this error may rarely be due to a circuit defect. * Crosstalk might occur from tracking to focus system. (See (11) ) --- Replace the mechanical unit. * Driver surroundings. * Defect of constant and IC. * For double-layer discs, after checking CLV on layer L1, jumps to layer L0 after mode changes to FG. Then tracking is turned off, and adjustments are executed from the focus position coarse adjustment in order. * When the jump between layers is done on the single-layer disk, the disk distinction error is thought.

--- The laser power is low (RF level is confirmed by IC101"87" (RFOP)).

--- AS1, AS2, REFNV Is the signal sent to between IC101 and IC201 ?

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XV-D721BK XV-D723GD

(9) Neither picture nor sound is output

* Cannot search a) Can the feed system be driven?

Check the waveform of TRSDRV signal (R273). --- Waveform between R274 and C271.

Search results in a change of duty (three values with 2.5V at the center) (The figure is exaggerated.)

Check the waveform of CN101 "1" and "2". --- After the driver (IC271)

b) Is kick available?

Check the TRDRV signal waveform from R289.

Check the waveform of CN101 "2" and "4" --- After the driver (IC271) Although differs in amplitude and DC offset, the waveform is similar to that of R289

Kick pulse

Approx.

2.5V

Long-distance seek

Acceleration pulse at start; deceleration pulse at stop (each one) (In the direction of search, opposite to this figure)

For short-distance search, the waveform becomes roundish, not trapezoidal, and voltage is low.

Feed

Tracking

Kick pulse (fine seek) is inserted after longdistance seek. (Not one)

1-16

Hold (DC) during feed

(10) Picture is distorted or abnormal sound occurs at intervals of several seconds.

XV-D721BK XV-D723GD

Does JITOUT

change periodically?

(2V or more in peak

value, except

during kick)

YES

Feed system is defective (drive gain is defective: too large). Check the waveform according to a) in (9). Play back a simple disc with no angle change. OK when the following waveform appears at intervals

of several seconds.

5~10Sec.

1~1.2V

Some system other

than servo may be

defective.

If this voltage is too high (2V or more, for example), feed motor may be defective, or the mechanical unit has seized.

(11) Others (unusual events experienced to date)

* Problem occurs with double-layer discs although no problem occurs with single-layer DVD.

(Error occurs, or search becomes unstable and takes longer.)

Crosstalk might occur from tracking to focus system.

--- When FE was observed during search (skip, etc.), it was found that a wave resembling TE with an amplitude of 200mVp-p was riding on FE.

--- Mechanical unit was replaced.

* Error frequently occurred in the outer part of discs although no error occurred in the inner part.

--- Mechanical unit was replaced because tilt seemed to be defective.

(12) CD During normal playback operation

a) Is TOC reading normal?

Please refer to "Servo Volume" flow. Displays total time for CD-DA. Shifts to double-speed mode for V-CD.

YES

b)Playback possible?

*--:-- is displayed during FL serch.

According to [*Cannot serch ] for DVD(9), check the feed

and tracking systems.

*No sound is output although the time is displayed.(CA-DA)

*DAC, etc, other than servo.

*The passage of time is not stable, or picture is abnormal.(V-CD)

*The wound of the disc and dirt are confirmed.

(13) Others

V-CD : Frequent occurrence of error in inside and outer. (Even the disk without the wound : when generated.)

Waveform observation

--- Is the oscillation frequency of about 700~900Hz output? (Borrow a pertinent disk for the complaint for the combination with the disk.)

--- Exchanges mechanism for the mechanism resonance.

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XV-D721BK XV-D723GD

Description of major ICs

AN8706FHQ (IC101) : Front end processor

1.Pin layout

CBDOSL

CSAG

DCAGC

AGCG

PEAK

BOTTOM

RFENVFCBOOST

OFTR

BDO

75747372717069686766656463626160595857565554535251

RBCA

RFINP

RFINN

VCC2 GND2

VREF2

RFON RFOP

DCRF

FS VIN6 VIN5

VCC1

VIN1 VIN2 VIN3 VIN4

VREF4

DIFP DIFN

76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

AN8706FHQ

CBDOFS

TESTSG

COFTFS COFTSL

JITOUT

GND3

FUPDN

ITDLI

VCOIN

PLFLT

PLFLT2

FCPO

PCPO

VCC3

CAPA

DTRD

IDGT

VCC5

RDCKP

RDCKN

RDTP

RDTN

GND5

GND4

VCC4

DTMONN

DTMONP

DSLFLT

DSLO

FLTOUT

DCFLT

VREF3

VPWBDO

VPWOFT

IDDLY

DBAL

GND1

VREF1

TKCNT

TKCFLT

TEOUT

TEI

RSCL

2.Block diagram

Head Amp. SSD Signal

Head Amp. DPD Signal

12345678910111213141516171819202122232425

LPCOA

LDONB

LDONA

LPC1

VHARF

RFOUT FS/TS

POFLT

TGBAL

PTH

TBAL

FBAL

FGCTL

FEN

FEOUT

VREFL

VREFC

TGTETKCNTTBALFBALFE

SEN

PULIN

VREFH

SCK

STDI

FC/Boost AGC Cont

TKCNT

FE(SSD) FE BAL

AGC

TE(DPD) TE BAL

STNBY

XTRON

RFIN

MTRON

ROMRAM

RF ENV

DSL

BDO Det

OFTR Det

DFLTOP/NRFENV

PLL

JITTER Det

SYNC

JITOUT CLK

DATA

DSLOUT

BDO

OFTR

1-18

TG(DPD)

LPC(Amp)

OPTICAL HEAD

(650nm)

INTERFACE

VREF reg

TGBAL CPU STNBY MTRON

SERVO PROCESSOR Head Amp.

XV-D721BK XV-D723GD

3.Pin function Pin No. Symbol I/O

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

LDONB LDONA LPCOA

LPC1

VHARF

TGBAL POFLT

PTH

TBAL

FGCTL

FBAL

FEOUT

FEN

VREFL VREFC VREFH

PULIN

SEN SCK

STDI STNBY XTRON

MTRON

ROMRAM

RSCL

TEI

TEOUT

TKCFLT

TKCNT

VREF1

GND1

DBAL

IDDLY VPWOFT VPWBDO

VREF3 DCFLT

FLTOUT

DSLO

DSLFLT DTMONP DTMONN

VCC4 GND4 GND5 RDTN RDTP

RDCKN

RDCKP

Functions

Laser ON (CD Head) terminal

Laser ON (DVD Head) terminal

Laser drive output terminal

Laser PIN input terminal

VHALF voltage output terminal

Tangential phase balance control terminal

Track detection Threshold value level terminal

Tracking balance control terminal

Tangential phase error signal output terminal

Focus amplifier Gain control terminal

Focus balance control terminal

Focus error signal output terminal

Focus error output amplifier reversing input terminal

VREFL voltage output terminal

VREFC voltage output terminal

VREFH voltage output terminal

DSL,PLL drawing mode switch terminal

SEN(Cereal data input terminal)

SCK(Cereal data input terminal)

STDI(Cereal data input terminal)

Standby mode control terminal

Tracking OFF holding input terminal

Monitor output ON/OFF switch terminal

I O O O O O

I O O O O O O O

I O O O O O O

RAM switch terminal

ROM Standard current source terminal Tracking error output Amp reversing input terminal Tracking error signal output terminal Track count detection filter terminal Track count output terminal VREF1 voltage output terminal Earth terminal 1 Data slice offset adjustment terminal Data slice delay adjustment terminal OFTR detection level setting terminal BDO detection level setting terminal VREF3 voltage output terminal Capacity connection terminal for data slice input filter Filter amplifier output terminal Data slice single data output terminal Constant filter terminal when data is sliceddelly PLL differential motion 2 making to value edge signal moniter output (+) PLL differential motion 2 making to value edge signal moniter output (-) Power terminal 4 (5V) Earth terminal 4 Earth terminal 5 PLL differential motion making to synchronization RF signal reversing output PLL differential motion making to synchronization RF signal rotation output PLL differential motion making synchronization clock reversing output PLL differential motion making synchronization clock rotation output

AN8706FHQ (1/2)

1-19

XV-D721BK XV-D723GD

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

VCC5

IDGT DTRD CAPA VCC3

PCPO FCPO

PLFLT2

PLFLT

VCOIN

ITDLI

FUPDN

GND3

JITOUT

BDO

OFTR

BOOST

RFENV

BOTTOM

PEAK

AGCG

DCAGC

CSAG CBDOSL CBDOFS

RBCA TESTSG

RFINP

RFINN

VCC2

GND2

VREF2

COFTFS

COFTFL

RFON

RFOP

DCRF

FS VIN6 VIN5

VCC1

VIN1 VIN2 VIN3 VIN4

VREF4

DIFP DIFN

I/OPin No. Symbol Functions

Power terminal 5 (3.3V)

Data slice part address part gate signal input terminal (For RAM)

Data slice data read signal input terminal(For RAM)

Data slice CAPA(Address)signal input terminal (For RAM)

Power terminal 3 (5V)

PLL phase gain set terminal

PLL frequency gain set terminal

PLL low region filter terminal

PLL high region filter terminal

PLL VCO input terminal

PLL jitter free current ripple removal filter terminal

PLL frequency control input terminal

Earth terminal 3

Detection signal output of jitter

BDO output terminal

OFTR output terminal

Booth control terminal for filter

FC control terminal for filter

RF enve output terminal

Bottom enve detection filter terminal

Peak enve detection filter terminal

AGC amplifier gain control terminal

AGC amp filter terminal

Sag cancellation circuit filter terminal

BDO detection capacitor terminal

BCA detection level setting terminal

TEST signal input terminal

RF signal positive moving input terminal

RF signal reversing input terminal

Power terminal 2 (5V)

Earth terminal 2

VREF2 voltage output terminal

OFTR detection capacitor terminal

RF signal output terminal P

RF signal output terminal N

All addition amplifier (DVD) output terminal

All addition amplifier capacitor terminal

All addition amplifier (CD) output terminal

Focus input of external division into two terminal

Power terminal 1 (5V)

External division into four (DVD/CD) RF input terminal 1

External division into four (DVD/CD) RF input terminal 2

External division into four (DVD/CD) RF input terminal 3

External division into four (DVD/CD) RF input terminal 4

VREF4 voltage output terminal

RF signal (RAM) output terminal P

RF signal (RAM) output terminal N

AN8706FHQ(2/2)

1-20

MN103007BGA (IC301) : Optical disc controller

1.Terminal layout

DMARQ

NIOWR

VSS

NIORD

IORDY

NDMACK

5VDD

INTRQ

IOCS16

DA1

VSS

NPDIAG

DA0

DA2

VDD

NCS1FX

NCS3FX

NDASP

NTRYCL

144

143

142

141

140

139

138

137

136

135

134

133

132

131

130

129

128

127

HDD15

HDD0

HDD14

5VDD HDD1

HDD13

HDD2

VSS

HDD12

VDD

HDD3

HDD11

HDD4

HDD10

5VDD HDD5 HDD9

VSS HDD6 HDD8 HDD7 5VDD

NRESET

MASTER

NINT0 NINT1

WAITOOC

NMRST

DASPST

VDD

OSCO2

OSCI2

UATASEL

VSS

PVSSDRAM

PVDDDAM

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

3738394041424344454647484950515253545556575859606162636465666768697071

MN103007BGA

126

5VDD

125

NEJECT

VSS

MONI0

124

123

122

MONI1

MONI2

121

120

MONI3

SDATA

119

118

SCLOCK

VDD

FAT0

117

116

115

DAT1

114

DAT2

113

DAT3

112

CHCK4

XCLDCK

111

110

SUBC

109

108 107 106 105 104 103 102 101 100

99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73

SBCK VSS P0 P1 PVDD PVSS VDD OSC01 OSCI1 VSS LRCK BLKCK IPFLAG DACCLK DACLRCK DACDATA NTRON LG JMPINH IDDHOLD PLLOK CLKOUT2 VDD NRST MMOD VSS CPDET1 CPDET2 BDO IDGT DTRO TEHLD VDD CLKOUT1 CPUDT0 CPUDT1

XV-D721BK XV-D723GD

2.Block diagram

DVD-ROM

Formatter

CGEN

MODE

VSS

CPUASR15

CPUNDA17

CPUADR16

CD-PRE

Instruction

memory

(40KB)

DATA

MEMORY

(6KB)

VDD

CPUADR9

CPUADR8

CPUADR11

CPUADR10

CPUADR7

CPUADR14

CPUADR13

CPUADR12

Formatter

General purpose IO bus

CPUADR6

CPUADR5

CPUADR4

CPUADR3

CPUADR2

i /t

High speed IO bus

32 bit

CPU core

GCAL

CPUADR1

VSS

NCS

CPUADR0

ECC

NWR

NRD

VDD

CPUDT17

CPUDT16

PVPODRAM

PTESTORAM

Host i / f

MPEG i / t

DMA

BCU

DRAMC

CPUDT15

CPUDT14

PVSSDRAM

OVDDDRAM

VSS

CPUDT2

CPUDT13

ATAPI

4Mbit

DRAM

WDT

16 bit

timer x 2

SYSTEM

i / f

INTC

1-21

XV-D721BK XV-D723GD

3.Function

Pin NO.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

Symbol

HDD15

HDD0

HDD14

5VDD HDD1

HDD13

HDD2

VSS

HDD12

VDD

HDD3

HDD11

HDD4

HDD10

5VDD HDD5 HDD9

VSS HDD6 HDD8 HDD7 5VDD

NRESET MASTER

NINT0 NINT1

WAITODC

NMRST

DASPST

VDD

OSCO2

OSCI2

UATASEL

VSS

PVSSDRAM PVDODRAM

CPUADR17 CPUADR18

VSS

CPUADR15 CPUADR14 CPUADR13 CPUADR12

VDD

CPUADR11 CPUADR10

CPUADR9

I/O

Function

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

I/O

ATAPI data

ATAPI reset

I/O

ATAPI master / slave selection

System control interruption 0

System control interruption 1

System control weight control

System control reset

DASP signal initializing

I,O

VSS connection,OPEN

I,O

VSS connection, OPEN

VSS connection

System control address

System control address System control address

System control address

Pin NO.

48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

65 66 67 68 69 70 71 72 73 74 75 76 77 78

79 80

81 82 83 84 85 86 87 88 89 90

Symbol

CPUADR8 CPUADR7 CPUADR6 CPUADR5 CPUADR4 CPUADR3 CPUADR2 CPUADR1

VSS

CPUADR0

NCS

NWR

NRD

VDD CPUDT7 CPUDT6

PVPPDRAM

PTESTDRAM

OVDDDRAM

PVSSDRAM

CPUDT5 CPUDT4 CPUDT3

VSS CPUDT2 CPUDT1 CPUDT0

CLKOUT1

VDD

TEHLD

DTRO

IDGT

BDO

CPDET2 CPDET1

VSS

MMOD

NRST

VDD

CLKOUT2

PLLOK

IDOHOLD

JMPINH

MN103007BGA(1/2)

I/O

Function

System control address

GND System control address

System control chip selection

System control wright

System control lead

Apply 3V System control data System control data C=10000PF is connected

between VSS VSS connected

System control data System control data System control data GND System control data System control data

I/O

System control data

I/O

16.9/11.2/8.45MHz clock

Apply 3V

Mirror gate

Data part frequency control

switch Part CAPA switch

RF dropout / BCA data of

making to binary Outer side CAPA detection

Side of surroundings on inside

GND VSS connected

System reset

Apply 3V

16.9MHz clock

Frame mark detection

ID gate for tracking holding

Jump prohibition

1-22

MN103007BGA(2/2)

XV-D721BK XV-D723GD

Pin NO.

91 92 93 94 95 96 97 98

99 100 101 102 103 104 105

106

107 108 109 110 111

112 113 114 115 116 117

118

119~122

123 124 125 126 127

128 129 130 131 132

Symbol I/O Function

NTRON

DACDATA

DACLRCK

DACCLK

IPFLAG

BLKCK

LRCK

VSS

OSCI1

OSCO1

VDD

PVSS

PVDD

VSS SBCK SUBC

XCLDCK

CHCK4

DA T3 DA T2 DA T1 DA T0

VDD

SCLOCK

SDATA

MONI3~0

VSS

NEJECT

5VDD

NTRYCL

NDASP

NCS3FX NCS1FX

VDD

DA2 DA0

Land / group switch

Tracking ON

Cereal output

L and R identification output

Clock for cereal output

Interpolation flag input

Sub-code,Block clock input

L and R identification signal output

I,O

16.9MHz oscillation

I,O

16.9MHz oscillation

I/O

Terminal MASTER polarity switch input

I/O

CIRC-RAM OVER/UNDER Interruption signal input

Sub-code, Clock output for serial input

Sub-code, Cereal input

Sub-code, Frame clock input

Read clock to DAT3~0(Output of dividing frequency four from ADSC)

Read data from DISC

(PAralle output from ADSC) I I

I/O

Debugging cereal clock

(270 pull up)

I/O

Debugging cereal data

(270 pull up)

Internal goods title monitor

Eject detection

Tray close detection

I/O

ATAPI Drive active/

Sulave connection I/O I

ATAPI host chip selection I

ATAPI host chip selection

I/O

ATAPI host address

I/O

ATAPI host address

Pin NO.

133 134 135 136

137 138 139 140 141 142 143 144

Symbol I/O Function

ATAPI slave master diagnosis input

NPDIAG

VSS

DA1

IOCS16

INTRQ

5VDD

NDMACK

IORDY NIORD

VSS

NIOWR

DMARQ

I/O

ATAPI host address

I/O

ATAPI output of selection of width

of host data bus ATAPI host interruption output

ATAPI host DMA response

ATAPI host ready output

ATAPI host read

ATAPI host writes

I/O

ATAPI host DMA demand

1-23

XV-D721BK XV-D723GD

MN67705EA (IC201) : Digital servo controller

1.Terminal layout

FEPNTRON

N.C.

CDDVD

N.C.

ECR(PWM3B)

EC(PWM3A)

DVSS

SYSCLK

VCOF1

DVSS

128

127

126

125

124

123

122

121

120

119

118

117

116

FGC

LDONA

LDONB

PULIN

SRF

DVSS

DVDD

TRVSW

ST/SP

HFMON

BRK

DVSS

PLLOK

N.C.

N.C. N.C.

N.C. DVSS DVDD

TSTSG

FUPDN

MONA MONB

6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

33343536373839404142434445464748495051525354555657585960616263

CPSEN

CPCEN

CPUIRQ

CPUCLK

CPUDTIN

MN67705

BDO

SDAT-

CHK4I

SCLK-

SDAT+

SCLK+

CPUDTOUT

SBCK

TRAYSET1 TRAYSET2

DRVMUTE

TRAY-CLOSE

TRAY-OPEN

TBAL(PWMDA1) GBAL(PWMDA2)

BDOLVL(PWMDA3)

OFTLVL(PWMDA4)

IREF1

XRESET

115

114

N.C.

TEST

MINTESTFGDSLO

113

112

111

N.C.

DVSS

TKCRS2

110

109

DVSS

DVDD

TKCRS1

OFTR

DVDD

108

107

106

SUBC

MONC

BLKCLK

TRSDRVB(DA8)

TRSDRVA(DA7)

TRDRV(DA6)

105

104

103

LRCK

NTRON

NCLDCK

FODRV(DA5) 102

DVSS

DBAL(DA4) 101

DAT0

BOOST(DA3) 100

DAT1

FC(DA2)

FBAL(DA1)

999897

DAT2

DAT3

AVDD

96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65

CHCK4

AVSS TS(AD1) FS(AD2) FE(AD3) TROFS(AD4) TE(AD5) VREFLDA VREFMDA VREFHDA TG(AD6) N.C.(AD7) N.C.(AD8) RFENV(AD9) VREFOP LDCUR(AD10) JITOUT(AD11) VREFC AVDD(AD12) VREFHAD VREFMAD VREFLAD AVSS DVDD DVSS TX MOND IPFLAG CIRCIRQ N.C. N.C. N.C DVSS

2.Block diagram

The signal of the error of the servo input from FEP.

Driver

ODC

A/Dconverter

Track crossing

counter Phese

comparison

Line speed

detection

Detection at

FG cycle

CIRC core

Focus servo

Tracking servo

Traverse servo

Spindle servo

SERVO

DSP core

Serial port

CPU I/F

PLL

A/D converter

(Analog control)

PWM

Standard

clock

generation

PLL

FEP I/F

PLL

Focus tracking

driving value output

Spindre / traverse

driving value output

Crystal

33.8MHz

FEP

1-24

CPU

ADSC function block of the second generation.

XV-D721BK XV-D723GD

3.Pin function Pin No. Symbol I/O

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

FGC LDONA LDONB

PULIN

SRF

DVSS TRAYSET1 TRAYSET2

DRVMUTE

DVDD

TRVSW

TRAY-CLOSE

TRAY-OPEN

ST/SP

HFMON

BRK

DVSS

PLLOK

N.C.

TBAL(PWMDA1)

GBAL(PWMDA2)

BDOL VL(PWMDA3 )

OFTL VL(PWMDA4 )

N.C. N.C. N.C.

DVSS

DVDD

TSTSG

FUPDN

MONA

MONB CPSEN CPCEN

CPUIRQ

CPUCLK

CPUDTIN

CPUDTOUT

CHK4I

SCLK+

SCLK-

SDAT+

SDAT-

BDO SBCK IREF2

Function

H fixation

Laser drive controlA (ON / OFF)

Laser drive controlB (ON / OFF)

DSL and PLL high boost signal (FEP)

Head amplifier gain H/L selection Ground for digital circuit

Tray drive ON/OFF and direction control

Drive IC mute control Power supply for digital circuit

Surroundings position detection in traverse

Tray close detection SW

Tray opening detection SW

Spindle motor drive switch (START /STOP)

High cycle module control

Spindle motor IC short brake control Ground for digital circuit

SYNC detection (DVD : 18T / CD : 22T) O O

Tracking balance (FEP) O

Tangential balance (FEP) O

BDO slice level (FEP) O

Off-track error slice level (FEP) O O O

Ground for digital circuit

Power supply for digital circuit O

Self calibration signal (FEP) O

Signal of frequency UP/DOWN of PLL (FEP) O

Monitor terminal A O

Monitor terminal B

Servo DSP cereal I/F chip selection (SYSCOM)

CIRC cereal I/F chip selection (SYSCOM) O

Interrupt request to silicon (SYSCOM)

Silicon cereal I/F clock (SYSCOM)

Silicon cereal I/F data input (SYSCOM) O

Silicon cereal I/F data output (SYSCOM)

Connects with unused DVSS

Lead channel clock differential motion signal (positive)

Lead channel clock differential motion signal (negative)

Lead channel data differential motion signal (positive)

Lead channel data differential motion signal (negative)

BDO + BCA (FEP)

CD sub-code data shift clock (ODC)

Connects with unused DVSS

MN67705EA (1/3)

1-25

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