Jvc XV-SA72-SL Service Manual

XV-SA70BK/XV-SA72SL

SERVICE MANUAL

DVD AUDIO/VIDEO PLAYER

XV-SA70BK / XV-SA72SL

EN ------- Northern Europe UJ ----------- USA Military

Area Suffix

(XV-SA70BK)

Contents

Area Suffix

(XV-SA72SL)

B -------------------------- U.K. E --- Continental Europe EN ---- Northern Europe

(For only Europe)

(This illustration is version EN)

VIDEO CD

(For only Asia)

EE - Russian Federation US ------------- Singapore UW -- Brazil,Mexico,Peru

Each difference point

Model XV-SA70BK XV-SA72SL

Body color

Black Silver

Safety precautions ------------------------ 1-2 Preventing static electricity ------------- 1-3 Precautions for service ------------------ 1-4 Important for laser products ------------ 1-5

This service manual is printed on 100% recycled paper.

Disassembly method -------------------- 1-6 Adjustment method ---------------------- 1-15 Troubleshooting -------------------------- 1-19 Description of major ICs ---------------- 1-23 Glossary of term and abbreviations -- 1-44

No.A0022

Oct. 2001

XV-SA70BK/XV-SA72SL

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. Alterations 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 property damage resulting therefrom.

3. Many electrical and mechanical parts 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 parts 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 service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage current 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. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure 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.). This corresponds to 0.5 mA AC (r.m.s.).

0.15 F AC TYPE

1500 10W

Good earth ground

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

Place this probe on each exposed metal part.

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.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J and C version)

1-2

XV-SA70BK/XV-SA72SL

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

1-3

XV-SA70BK/XV-SA72SL

Precautions for Service

Handling of Traverse Unit and Laser Pickup

1. Do not touch any peripheral element of the pickup or the actuator.

2. The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.

3. Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)

4. To replace the traverse unit, pull out the metal short pin for protection from charging.

5. When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center of the flexible wire to open the circuit.

6. Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block. Do not change the setting of these half-fixed resistors for laser power adjustment.

Destruction of Traverse Unit and Laser Pickup by Static Electricity

Laser diodes are easily destroyed by static electricity charged on clothing

or the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic protection:

1. Wear an antistatic wrist wrap.

2. With a conductive sheet or a steel plate on the workbench on which the traverse unit or the pick up is to be repaired, ground the sheet or the plate.

3. After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.

4. Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup. After completing the repair, remove the solder

to open the circuit.

Please refer to "Fig.5" of "Disassembly method" for details.

Short circuit

Servo control board

1-4

Important for Laser Products

XV-SA70BK/XV-SA72SL

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 laser radiation and is equipped with safety switches which prevent 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 LABEL and PRINT

WARNING LABEL and PRINT

CAUTION: Invisible laser

radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e)

VARNING: Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen. (s)

ADVARSEL: Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling (d)

VARO: Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso säteeseen. (f)

RIGHT LEFTSUBWOOFER

CENTER

REAR

RIGHT

AUDIO OUT

VIDEO

LEFT

FRONT

S-VIDEO

PCM / STREAM

COAXIALOPTICAL

COMPONENT

VIDEO OUTDIGITAL OUT

BPR

CLASS 1 LASER PRODUCT

VIDEO OUT

SELECT

NTSC PAL

AV COMPU LINK

AC IN

1-5

XV-SA70BK/XV-SA72SL

CN711

CN3

JT202 JT102

Surround

audio board

Part a

Disassembly method

Removing the top cover (see Fig.1)

1. Remove the two screws A attaching the top cover on both sides of the body.

2. Remove the three screws B attaching the top cover on the back of body.

3. Remove the top cover from the body by lifting the rear panel of top cover.

ATTENTION : Do not break the front panel tab

fitted to the top cover.

Removing the surround audio board (see Fig.1,2)

*Prior to performing the following procedure, remove

the top cover.

1. Disconnect the card wire from connector CN711 on the

surround audio board.

2. Remove the three screws C attaching the surround audio

board on the rear panel.

A x 2

audio board

CN3

CN711

Surround

FastenerFastener

Fig.1

JT202 JT102

Fig.2

3. The surround audio board is removed while picking up the

point of the fastener in two places.

Removing the mechanism assembly (see Fig.3,4)

*Prior to performing the following procedure, remove

the top cover.

*There is no need to remove the front panel assembly.

1.Remove the three screws D attaching the mechanism

assembly on the bottom chassis.

2.The servo control board is removed from the connector

CN512 and CN513 connected with the main board respectively.

3.Remove the mechanism assembly by lifting the rear part

of the mechanism assembly.

Removing the servo control board (see Fig.5)

*Prior to performing the following procedure, remove

the top cover and mechanism assembly.

1.Disconnect the card wire from connector CN201 and

CN202 on the servo control board respectively.

2.Disconnect the flexible wire from connector CN101

on the servo control board from pick-up.

Main board

Hook b

CN3

CN201

Mechanism

assembly

CN513

JT202

JT102

Fig.3

Fig.4

Part a

CN512

Servo control

board

CN202

Hook b

ATTENTION At this time, please extract the wire after short-circuited of two places on the wire in part a with solder. Please remove the solder two places of part a after connecting the wire with CN101 when reassembling.

3.Two places in hook b are removed, the servo control

board is lifted, and it is removed.

1-6

Servo control board

CN101

Fig.5

Removing the rear panel (see Fig.6)

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

1.Remove the twelve screws E attaching the rear panel on the back of body.

XV-SA70BK/XV-SA72SL

for Asia

for Europe

Removing the front panel assembly (see Fig.7,8)

* Prior to performing the following procedure, remove the top cover. * There is no need to remove the mechanism assembly.

1.Remove the one screw F attaching the front panel assembly on the bottom chassis.

2.Remove the four screws G attaching the foot on the bottom chassis.

3.Disconnect the wire from CN3, JT102 and JT202 on the main board respectively.

4.Hook c and d are removed respectively, and the front panel assembly is removed.

Hook d

Hook c

Foot

CN3

Fig.6

Foot

Hook d

Fig.7

JT202 JT102

Removing the main board (see Fig.9)

* Prior to performing the following procedure, remove the top cover, surround audio board, mechanism assembly and rear panel.

1.Disconnect the wire from CN3, JT102 and JT202 and on the main board respectively.

2.Remove the four screws H attaching the main board on the bottom chassis.

Fig.8

CN3

Fig.9

JT102 JT202

1-7

XV-SA70BK/XV-SA72SL

Removing the clamper assembly

(See Fig.1)

Remove the four screws A attaching the clamper assembly.

Move the clamper in the direction of the arrow to release the two joints a on both sides.

ATTENTION:

When reattaching, fit the clamper to the two joints a.

Removing the tray (See Fig.2 and 3)

Prior to performing the following procedure, remove the clamper assembly.

Push b of the slide cam into the slot on the left side of the loading base until it stops.

Draw out the tray toward the front.

Joint a

Fig.1

ATTENTION:

Before reattaching the tray, slide the part c of the slide cam to the right as shown in Fig.3.

Clamper base

Push

Tray

Fig.2

Part c

Slide cam

Fig.3

1-8

Removing the traverse mechanism assembly (See Fig.4 and 5)

XV-SA70BK/XV-SA72SL

Prior to performing the following procedure, remove the clamper assembly and the tray.

Remove the four screws B attaching the traverse mechanism assembly.

ATTENTION:

Before reattaching the traverse mechanism assembly, pass the card wire extending from the spindle motor board through the notch d of the elevator.

Removing the elevator (See Fig.6 and 7)

Prior to performing the following procedure, remove the clamper assembly, the tray and the traverse mechanism assembly.

Extend each bar e inside of the loading base outward and detach the elevator shaft.

Traverse mechanism assembly

Fig.4

Traverse mechanism assembly

Elevator

Notch d

ATTENTION:

Elevator

When reattaching, first fit the two shafts on the front of the elevator to the slots f of the slide cam.

Shafts

Slide cam

Elevator

Fig.5

Elevator

Loading base

Slots f

Fig.6Fig.7

1-9

XV-SA70BK/XV-SA72SL

Removing the motor assembly

(See Fig.8 and 9)

Prior to performing the following procedure, remove the clamper assembly, the tray, the traverse mechanism assembly and the elevator.

Remove the belt from the pulley.

Remove the screw C attaching the motor assembly.

Turn over the body and remove the screw D attaching the motor assembly.

Release the two tabs g retaining the motor board.

Belt

Motor assembly

Fig.8

Tabs g

Motor assembly

Loading base

Fig.9

1-10

XV-SA70BK/XV-SA72SL

Pulley gear

Pulley gear bracket

Motor assembly

Pulley gear bracket

Idle gear

Fig.10

Idle gear

Pulley gear

Tads h

Pulley gear

Removing the Idle gear / pulley gear / middle gear / slide cam (See Fig.10 to 12)

Prior to performing the following procedure, remove the clamper assembly, the tray, the traverse mechanism assembly, the elevator and the motor assembly.

Press the two tabs h inward and pull out the idle gear.

Remove the screw E attaching the pulley gear bracket. Slide the pulley gear bracket in the direction of the arrow and pull out the pulley gear.

Slide the slide cam in the direction of the arrow to release the two joints i and remove upward.

Remove the middle gear.

Slide cam

Joint i

Slide cam

Middle gear

Joint i

Fig.11

Middle gear

Fig.12

Loading base

1-11

XV-SA70BK/XV-SA72SL

Removing the feed motor assembly

(See Fig.13)

Unsolder the two soldering j on the spindle motor board.

Remove the two screws F attaching the feed motor assembly.

Removing the feed motor

(See Fig.13 to 15)

Prior to performing the following procedure, remove the feed motor assembly.

Remove the screw G attaching the thrust spring.

Feed motor assembly

Notch k

Soldering j

Spindle motor board

Pickup

Spindle motor

Fig.13

Feed gear (M)

Thrust spring

ATTENTION:

Remove the feed gear (M).

Pull out the feed gear (E) and the lead screw.

Remove the two screws H attaching the feed motor.

ATTENTION:

When reattaching the thrust spring, make sure that the thrust spring presses the feed gear (M) and the feed gear (E) reasonably.

When reattaching, pass the two cables extending from the feed motor through the notch k of the feed holder as shown in Fig.13.

Lead screw

Feed gear (E)

Fig.14

Feed motor

1-12

Feed holder

Fig.15

XV-SA70BK/XV-SA72SL

Removing the pickup (See Fig.16 and 17)

Remove the screw I attaching the T spring (S) and the shaft holder. Remove also the plate.

ATTENTION:

Pull out the part l of the shaft upward. Move the part m in the direction of the arrow and detach from the spindle base.

Disengage the joint n of the pickup and the shaft in the direction of the arrow.

Pull out the shaft from the pickup.

Remove the two screws J attaching the actuator.

Disengage the joint of the actuator and the lead spring. Pull out the lead spring.

When reattaching, make sure that the T spring (S) presses the shaft.

Shaft holder

Plate

T spring (S)

Lead spring

Pickup

Joint n

Part m

Part l

Fig.16

Actuator

Lead spring

Shaft

Spring

The spring must be under the shaft when you install pick-up.

Removing the shaft holder / shaft

(See Fig.18)

Remove the screw K attaching the shaft holder.

Remove the shaft.

Pick-up

Pickup

Shaft

Fig.17

Shaft

Shaft holder

Fig.18

1-13

XV-SA70BK/XV-SA72SL

Removing the spindle motor assembly

(See Fig.19 to 21)

Remove the three screws L attaching the spindle motor on the bottom of the mechanism base.

ATTENTION:

Remove the three screws M attaching the spindle base.

When reattaching, pass the card wire extending from the spindle motor board through the notch of the spindle base.

Spindle motor assembly

Spindle motor

Fig.19

Spindle base

Fig.20

Spindle base

Mechanism base

Fig.21

1-14

XV-SA70BK/XV-SA72SL

Adjustment method

(1) Test mode setting method

1)Take out the disc and close the tray.

2)Unplug the power plug.

3)Insert power plug into outlet while pressing both "PLAY" button and "STOP" button of the main body.

4)The player displays "TEST " on the FL display. " " means the player version.

5)When the power supply is turned off, test mode is released. The mode changes as follows whenever the "CHOICE" button of remote controller is pushed in test mode.

TEST_ _ -----------------------

---------

_ _ _ ------------

CHECK ---------------------------------

FL display becomes all lighting ---

--------------------

Becomes test mode

Device key index

Version of microcomputer

Check mode

Confirmation of FL display

Not use mode

(2) Initialization method

Please initialize according to the following procedures when microprocessor or pick-up is exchanged and when the up-grade is done.

1)Makes to test mode.

2)After "FORWARD SKIP" button ( ) of the main body is pushed, "PAUSE" button is pushed.

3)DVD AUDIO indicator lights when about ten seconds pass. Then, it is initialization completion.

(3) Method of displaying device key index

1)Makes to test mode and initializes.

2)When "CHOICE" button of remote controller is pushed once, the device key index is displayed on the

FL display as follows.

FL Display

is a figure or an alphabet.

(4) Method of displaying version of microcomputer

1)Makes to test mode and initializes

2)When "CHOICE" button of remote controller is pushed twice, the figure is displayed on the FL display as follows.

FL Display

FL Display microcomputer (IC2) Front end microcomputer (IC401)

BACK SKIP Button

(display of current value)

TOP MENU Button

(laser ON)

CURSOR UP Button (firmware upgrade)

CHOICE Button (switch of mode)

27_09_27_FC

POWER

Button

DVD AUDIO

Indicator

(for initialize)

FL Display

PLAY Button

(for test mode or

display of jitter value)

Microcode of decoder Decoder part (IC509)

FORWARD SKIP

Button

(for initialize)

(automatic adjustment or initialize)

STOP

Button

(for test mode)

PAUSE Button

1-15

XV-SA70BK/XV-SA72SL

(5) Display of current value of laser

1)Makes to test mode and initializes

2)When "CHOICE" button of remote controller is pushed three times, It is displayed on the FL display, "CHECK".

3)The display of FL display changes from "CHECK" into "LD_ON" if the "TOP MENU" button of remote controller is pushed.

4)The laser is turned on if the "BACK SKIP" button ( ) of remote controller is pushed in the state, and the current value of the laser is displayed on the FL display.

FL Display

LD_0034

As for the current value of the laser, the figure displayed on the FL display becomes a current value as it is by "mA" unit. becomes 34mA if displayed as 34.

5)The laser changes from CD into DVD if 3) and 4) of the above-mentioned procedures are done after the tray is opened and closed pushing the "OPEN/CLOSE" button of the main body. (The laser changes whenever this is done. Moreover, the value displayed first is a laser electric current of DVD)

If the laser current value is 64mA or less, it is roughly good. There is a possibility to which pick-up is deteriorated, and exchange pick-up, please when there are 65mA or more laser current value.

(6) Display of jitter value

1)Makes to test mode and initializes

2)When "CHOICE" button of remote controller is pushed three times, It is displayed on the FL display, "CHECK".

3)The automatic adjustment starts when test disk (VT-501) is inserted, and "PAUSE" button of the main body is pushed.

4)When the display of the FL display changes into "CHECK OK", the "PLAY" button of the main body is pushed.

5)The jitter value is displayed on the FL display as follows. FL Display

JIT_3978

If the indication value is 11% or less, it can be judged by this simple checking method that the signal read precision of the set is satisfactory. Please do "Flap adjustment of the pick-up guide shaft" when you replace the pick-up and the spindle motor when there are 11% or more jitter value.

The jitter value is displayed by the hexadecimal number and refer to the conversion table of following, please.

1-16

Jitter value

FL display FL display

3818 3828 3838 3848 3858 3868 3878 3888 3898 38A8 38b8 38c8 38d8 38E8 38F8 3918 3928 3938 3948 3958 3968 3978 3988

Conversion value(%)

4.7

4.8

4.9

5.1

5.2

5.3

5.4

5.5

5.7

5.8

5.9

6.0

6.1

6.3

6.4

6.6

6.7

6.9

7.0

7.1

7.2

7.3

7.5

3998 39A8 39B8 39C8 39D8 39E8 39F8 3A18 3A28 3A38 3A48 3A58 3A68 3A78 3A88 3A98 3AA8 3AB8 3AC8 3AD8 3AE8 3AF8

Conversion value(%)

7.6

7.7

7.8

7.9

8.1

8.2

8.3

8.5

8.7

8.8

8.9

9.0

9.1

9.3

9.4

9.5

9.6

9.7

9.9

10.0

10.1

10.2

FL display FL display

3B18 3B28 3B38 3B48 3B58 3B68 3B78 3B88 3B98 3BA8 3BB8 3BC8 3BD8 3BE8 3BF8 3C18 3C28 3C38 3C48 3C58 3C68 3C78 3C88

Conversion value(%)

10.5

10.6

10.7

10.8

10.9

11.1

11.2

11.3

11.4

11.5

11.7

11.8

11.9

12.0

12.1

12.4

12.5

12.7

12.9

13.0

13.1

13.2

3C98 3CA8 3CB8 3CC8 3CD8 3CE8 3CF8 3D18 3D28 3D38 3D48 3D58 3D68 3D78 3D88 3D98 3DA8 3DB8 3DC8 3DD8 3DE8 3DF8

Conversion value(%)

13.3

13.5

13.6

13.7

13.8

13.9

14.1

14.3

14.4

14.5

14.7

14.8

14.9

15.0

15.1

15.3

15.4

15.5

15.6

15.7

15.9

16.0

(7) Flap adjustment of the pick-up guide shaft

Stud (four pieces set)

Parts No. : JIGXVS40

Extension cord set (two cord and two board)

Parts No. : EXTXVS40CB

Hex wrench for adjustment

Off-the-shelf (1.3mm)

Test disc

VT-501 or VT-502

Assistance board

(Connect to main board)

XV-S40

MAIN CONNECT

Extension

cord

XV-SA70BK/XV-SA72SL

XV-S40 CONTROL CONNECT

Assistance board

(Connect to servo control board)

One is not used though it is one

set which consists of four units.

Stud

1.The mechanism assembly is made in the state from the main body from which is detached referring to the disassembly method.

2.Three studs are installed in the mechanism assembly respectively.

3.The servo control board is removed from the mechanism assembly, and puts into the state set up as shown in figure. (Each wire connected by the servo control board this time leaves the connection maintained.) Between shaft and hook of mechanism assembly of figure Board is put And, the board is inclined in the direction of the arrow on figure as much as possible.

4.The extension cord is inserted in the connector of the assistance board respectively. The main board is connected with the servo control board as shown in figure.

Hook

Mechanism assembly

Extension

Assistance

board

cord

Servo control board

Stud

Mechanism assembly

Stud

Servo control board

Shaft

Assistance

Main board

board

1.Puts into the state to display the jitter value on the FL display referring to "Display of the jitter value".

2.The adjustment screw under the traverse mechanism is turned with hex wrench, and matches so that the jitter value displayed on the FL display may become minimum value.

Adjustment screw a Adjustment screw b

<POINT>

1.turns in the forward or the opposite direction, and makes to the position where the jitter value is good the half rotation of adjustment screw a and b(180 degrees) respectively.

Adjustment screw c

2.Afterwards, adjustment screw b and c are turned in the same way, and makes to the best position.

1-17

XV-SA70BK/XV-SA72SL

(8) Upgrading of firmware

Please do the up-grade of the firmware after exchanging IC509,IC512,IC513.

1)The power supply is turned on pushing the "POWER" button.

2)The up-grade disk is inserted.

3)When FL display of the main body changes from "READING" into "UPGRADE", cursor UP button ( ) of remote controller is pushed.

4)The up-grade starts if the entire screen becomes blue and it is displayed, "Upgrade progress".

5)The tray opens automatically, the up-grade disk is removed.

6)The up-grade ends if the tray closes automatically, and the screen returns to the normal screen.

7)Please confirm the version of the microcomputer after makes to test mode and initializes.

Upgrade progress...

Upgrading (blue screen)After inserting the up-grade disk

When up-grade is completed

The disk for the up-grade is usually one piece. The disk becomes two pieces according to the version. In that case, please note the undermentioned content.

* The up-grade is done by using the STEP1 disk according to "1)" and "4)" of the above-mentioned procedure. * The tray opens automatically after a few seconds and exchange for the disk of STEP2, please. * The tray closes automatically. There is only about five second time that the tray opens this time, and replace the disk quickly between those, please.

ATTENTION

When the tray shuts with the STEP1 disk left for the tray

The up-grade starts again and exchange for the STEP2 disk, please when the tray opens automatically.

When the tray closes with there no disk in the tray

The tray opens automatically and turn off the power supply once, please pushing the "POWER" button in the state. When the STANDBY indicator lights, the STEP2 disk is putting in the tray and "POWER" button is pushed.

* After the up-grade ends, the STEP2 disk is removed because the tray opens automatically. * Afterwards, it is the same as 6),7) of the above-mentioned procedures.

1-18

Troubleshooting

Servo volume

Press OPEN /CLOSE key

XV-SA70BK/XV-SA72SL

Is tray

operation

Confirmation of tray drive circuit

and circuit in surrounding

correct?

Is the traverse moving along the innermost

perimeter for SW detection?

"NO DISC" message appears

immediately after vertical movement of the pick-up lens

The state that DISC does not rotate continues for several seconds, and becomes NO DISC or an error display afterwards. The rotation of DISC becomes high-speed and abnormal, and becomes NO DISC or an error display afterwards.

Is focus retraction OK?

OFF Even when it retracts correctly, if it is out of focus and makes repeated retries with a clicking sound, it is in error.

See "(4) Focus ON error"

in "Check points for individual errors"

Is tracking retraction OK?

See "(3) Traverse movement error" in "Check points for individual errors"

See "(2) Disk detection, distinction error" in "Check points for individual errors"

See "(1) Spindle startup error" in "Check points for individual errors"

Is the inter-layer jump OK?

LO LI

Two layers of DVD only.

(8) Inter-layer

jump error

OFF

If TE waveform reappears or fails to converge after the TE retraction, it is in error.

Is the spindle servo

locked correctly?

Is the RF OUT waveform

locked correctly?

See "(5) Tracking ON error"

in "Check points for individual errors"

See "(6) Spindle CLV error"

in "Check points for individual errors"

Has the disc information

been collected?

Stop will result

Is playback

possible?

OK !

(7) Address read

error

Check (9),(10),(11), and (12) items in "Check points for individual errors"

1-19

XV-SA70BK/XV-SA72SL

Check points for each error

(1) Spindle start error

1.Defective spindle motor

*Are there several ohms resistance between each pin of CN201 "5-6","6-7","5-7"? (The power supply is turned off and measured.)

*Is the sign wave of about 100mVp-p in the voltage had from each terminal? [ CN201"9"(H1-),"10"(H1+),"11"(H2-),"12"(H2+),"13"(H3-),"14"(H3+) ]

2.Defective spindle motor driver (IC251)

*Has motor drive voltage of a sine wave or a rectangular wave gone out to each terminal(SM1~3) of CN201"5,6,7" and IC251"2,4,7"?

*Is FG pulse output from the terminal of IC251"24"(FG) according to the rotation of the motor?

*Is it "L(about 0.9V)" while terminal of IC251"15"(VH) is rotating the motor?

3.Has the control signal come from servo IC or the microcomputer?

*Is it "L" while the terminal of IC251"18"(SBRK) is operating? Is it "H" while the terminal of IC251"23"(/SPMUTE) is operating?

*Is the control signal input to the terminal of IC251"22"(EC)? (changes from VHALF voltage while the motor is working.)

*Is the VHALF voltage input to the terminal of IC251"21"(ECR)?

4.Is the FG signal input to the servo IC?

*Is FG pulse input to the terminal of IC201"53"(FG) according to the rotation of the motor?

(2) Disc Detection, Distinction error (no disc, no RFENV)

* Laser is defective. * Front End Processor is defective (IC101). * APC circuit is defective. --- Q101,Q102. * Pattern is defective. --- Lines for CN101 - All patterns which relate to pick-up and patterns between IC101 * Servo IC is defective (IC201). * IC101 --- For signal from IC101 to IC201, is signal output from IC101 "20" (ASOUT) and IC101 "41"(RFENV) and IC101 "22" (FEOUT)?

1-20

(3) Traverse movement NG

1.Defective traverse driver *Has the voltage come between terminal of CN101 "1" and "2" ?

2.Defective BTL driver (IC271) *Has the motor drive voltage gone out to IC271"17" or "18"?

3.Has the control signal come from servo IC or the microcomputer? *Is it "H" while the terminal of IC271"9"(STBY1) ? *TRSDRV Is the signal input? (IC201 "51")

4.TRVSW is the signal input from microcomputer? (IC401 "50")

(4) Focus ON NG

* Is FE output ? --- Pattern, IC101 * Is FODRV signal sent ? (R279) --- Pattern, IC201 "5" * Is driving voltage sent ?

IC271 "13", "14" --- If NG, pattern, driver, mechanical unit .

* Mechanical unit is defective.

(5) Tracking ON NG

XV-SA70BK/XV-SA72SL

* When the tracking loop cannot be drawn in, TE shape of waves does not settle. * Mechanical unit is defective.

Because the self adjustment cannot be normally adjusted, the thing which cannot be normally drawn in is thought. * Periphery of driver (IC271)

Constant or IC it self is defective. * Servo IC (IC201)

When improperly adjusted due to defective IC.

(6) Spindle CLV NG

* IC101 -- "35"(RF OUT), "30"(ARF-), "31(ARF+). * Does not the input or the output of driver's spindle signal do the grip? * Has the tracking been turned on? * Spindle motor and driver is defective. * Additionally, "IC101 and IC201" and "Mechanism is defective(jitter)", etc. are thought.

(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)

Mechanism defective Defect of driver's IC(IC271) Defect of servo control IC(IC201)

1-21

XV-SA70BK/XV-SA72SL

(9) Neither picture nor sound is output

1.It is not possible to search *Has the tracking been turned on? *To

"(5) Tracking ON NG" in "Check points for each error"

*Is the feed operation normal? To "(3) traverse movement NG" in "Check points for each error" when it is not normal. Are not there caught of the feeding mechanism etc?

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

Is the feed operation normal? Are not there caught of the feeding mechanism etc?

(11) Others

The image is sometimes blocked, and the image stops. The image is blocked when going to outer though it is normal in surroundings in the disk and the stopping symptom increases.

when the tracking is not normal.

There is a possibility with bad jitter value for such a symptom.

(12) CD During normal playback operation

a) Is TOC reading normal? Displays total time for CD-DA. Shifts to double-speed mode for V-CD.

YES

b)Playback possible?

*--:-- is displayed during FL search. According to [It is not possible to search ] 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.

1-22

Description of major ICs

AK93C65AF-X(IC403):EEPROM

1.Pin layout

XV-SA70BK/XV-SA72SL

VCC

2.Block diagram

INSTRUCTION

GND

INSTRUCTION

DECODE,

CONTROL

AND

CLOCK

GENERATION

DATA

ADD.

BUFFERS

R/W AMPS

AND

AUTO ERASE

DECODER

EEPROM

4096bit

256 x 16

3.Pin function

Pin No.

1 2 3 4 5 6 7 8

Symbol

VCC

CS SK

GND

Program enable (Resistance with built-in pull-up) Power supply terminal Chip select Serial clock input Serial data input Serial data output Connect to ground Non connect

Description

Attention : Resistors of pin No.1(PE) are 2.5M ohm.

VREF

VPP SW

VPP

GENERATOR

1-23

XV-SA70BK/XV-SA72SL

AN8702FH(IC101):Frontend processor

1.Pin layout

HDTYPE

VIN12

VIN11

GND1

VIN4

VIN3

VIN2

VIN1

VREF1

VCC1

VIN10

VIN9

VIN8

VIN7

646362616059585756555453525150

VIN6

VIN5 49

2.Pin function

Pin No.

1 2 3 4 5 6 7 8 9

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

Symbol

PC1

PC01

PC2

PC02

TGBAL

TBAL FBAL

POFLT

DTRD

IDGT

STANDBY

SEN SCK

STDI RSEL JLINE

TEN

TEOUT

ASN

ASOUT

FEN

FEOUT

VSS

VDD

GND2

VREF2

VCC2

VHALF DFLTON DFLTOP

DSFLT

GND3

PC1

PC01

PC2

PC02

TGBAL

TBAL

FBAL

POFLT

DTRD

IDGT

SEN SCK

STDI RSEL JLINE

11 12 13 14 15 16

171819202122232425262728293031

TEN

TEOUT

STANDBY

I/O Description

Laser input terminal (DVD)

Laser drive signal output terminal (DVD)

Laser input terminal (CD)

Laser drive signal output terminal (CD)

Tangential phase balance control terminal

Tracking balance control terminal

Focus balance control terminal

Track detection threshold level terminal

Data slice part data read signal input terminal (For RAM)

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

Standby mode control terminal

SEN(Serial data input terminal)

SCK(Serial data input terminal)

STDI(Serial data input terminal)

Standard electric current terminal

Electric current setting terminal of JLine

Reversing input terminal of tracking error output AMP.

Tracking error signal output terminal

Offset adjusting terminal 1

Full adder signal output terminal

Focus error output amplifier reversing input terminal

Focus error signal output terminal

Connect to GND

Tangential phase error signal output terminal

Power supply terminal 3V

Connect to GND

VREF2 voltage output terminal

Power supply terminal 5V

VHALF voltage output terminal

Reversing output terminal of filter AMP.

Filter AMP. output terminal

Capacity connection terminal for filter output

Connect to GND

AN8702FH

FEN

ASN

FEOUT

ASOUT

VSS

RFINN RFINP

TESTSG

AGCO

AGCG

PEAK

43 42

BOTTOM

RFENV

BDO

OFTR

DCRF

RFC

VCC3

RFOUT

RFDIFO

GND3

VDD

VCC2

GND2

VREF2

Pin No.

Symbol I/O Description

RFDIFO

RFOUT 36 37 38 39 40 41

RFENV 42

BOTTOM 43 44

AGCG

AGCO

TESTSG

RFINP

RFINN 49 50 51 52 53 54 55 56

VREF1

61 62 63 64

HDTYPE

VHALF

VCC3

RFC DCRF OFTR

BDO

PEAK

VIN5 VIN6 VIN7 VIN8

VIN9 VIN10 VCC1

VIN1

VIN2

VIN3

VIN4

GND1 VIN11 VIN12

DSFLT

DFLTOP

DFLTON

Radial differential motion output terminal

Connect to TP101

Power supply terminal 5V

Filter for RF delay correction AMP.

All addition amplifier capacitor terminal

OFTR output terminal

BDO output terminal

RF envelope output terminal

Bottom envelope detection filter terminal

Peak envelope detection filter terminal

AGC amplifier gain control terminal

AGC amplifier level control terminal

TEST signal input terminal

RF signal positive input terminal

RF signal negative input terminal

Focus input of external division into two terminal

Non connect

Focus input of external division into two terminal

Power supply terminal 5V

VREF1 voltage output terminal

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 Connect to GND

3 beam sub input terminal 2 (CD)

3 beam sub input terminal 1 (CD)

Connect to ground

1-24

BA5983FM-X (IC271) : 4CH Driver

1.Block diagram

Vcc

10k

20k

23 22

10k

20k

STAND BY CH4

Vcc

10k

Level Shift

XV-SA70BK/XV-SA72SL

17 16

10k

Level Shift

10k

2.Pin function

Pin No. Pin No.

Symbol Symbol

BIAS IN

OPIN1(+)

OPIN1(-)

OPOUT1

OPIN2(+)

OPIN2(-)

OPOUT2

9 10 11 12 13 14

GND

STBY1

PowVcc1

VO2(-)

VO2(+)

VO1(-)

VO1(+)

I/O I/O

Input for Bias-amplifier

Non inverting input for CH1 OP-AMP

Inverting input for CH1 OP-AMP

Output for CH1 OP-AMP

Non inverting input for CH2 OP-AMP

Inverting input for CH2 OP-AMP

Output for CH2 OP-AMP

Substrate ground

Input for CH1/2/3 stand by control

Vcc for CH1/2 power block

Inverted output of CH2

Non inverted output of CH2

Inverted output of CH1

Non inverted output of CH1

Description

15 16 17 18 19 20 21 22 23 24 25 26 27 28

STAND BY CH1/2/3

VO4(+) VO4(-) VO3(+) VO3(-)

PowVcc2

STBY2

GND OPOUT3 OPIN3(-)

OPIN3(+) OPOUT4

OPIN4(-)

OPIN4(+)

PreVcc

Level Shift

10k

Vcc

10k

Description

Non inverted output of CH4

Inverted output of CH4

Non inverted output of CH3

Inverted output of CH3

Vcc for CH3/4 power block

Input for Ch4 stand by control

Substrate ground

Output for CH3 OP-AMP

Inverting input for CH3 OP-AMP

Non inverting input for CH3 OP-AMP

Output for CH4 OP-AMP

Inverting input for CH4 OP-AMP

Non inverting input for CH4 OP-AMP

Vcc for pre block

10k

74LCX373MTC-X(IC512,IC513)

1.Pin layout

GND

20 19 18 17 16 15 14 13 12 11

2.Pin function

VCC Q7 D7 D6 Q6 Q5 D5 D4 Q4 LE

Symbol Description

D0~D7

Q0~Q7

Data inputs Latch enable input Output enable input 3-State latch outputs

3.Truth table

INPUTS OUTPUTS

H L L

L H X

H = HIGH Voltage level L = LOW Voltage level Z = High impedance X = Immaterial Q0 = Previous Q0 before HIGH to LOW transition of latch enable

Z L H

1-25

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