Jvc TH-A10, TH-A10-R Service Manual

SERVICE MANUAL

DVD DIGITAL THEATER SYSTEM

TH-A10R

SP-PWA10

TH-A10

RM-STHA10R

TH-A10R/TH-A10TH-A10R/TH-A10

TH-A10R

TH-A10

SP-XSA10 SP-XSA10

SP-XCA10

XV-THA10R

Area Suffix

TH-A10R

B
EN
EE

XV-THA10R (DVD player)/XV-TH-A10

SP-THA10

(Speaker section)

Northern Europe

U.K.

Russia

SP-PWA10 (Powered subwoofer)
SP-XCA10 (Center speaker)

SP-XSA10 (Satellite speaker) x 4

E Continental Europe

RM-STHA10EC

Area Suffix

TH-A10

Contents

Safety Precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method

COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.

1-2
1-3
1-4
1-5
1-21

Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs

1-24
1-25
1-25
1-26

No.20872

Sep. 2000

TH-A10R/TH-A10

Safety precautions

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 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.
Move the resistor connection to eachexposed metal
part, particularly 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.).
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.

Warning

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.

1-2

CAUTION

!

TH-A10R/TH-A10

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

TH-A10R/TH-A10

Dismantling and assembling the traverse unit

1. Notice regarding replacement of optical pickup

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 to the optical pickup or connected devices.

(Refer to the section regarding anti-static measures.)

1. Do not touch the area around the laser diode and actuator.

2. Do not check the laser diode using a tester, as the diode may easily be destroyed.

3. It is recommended that you use a grounded soldering iron when shorting or removing the laser diode.
Recommended soldering iron: HAKKO ESD-compatible product

4. Solder the land on the optical pickup's flexible cable.
Note : Short the land after shorting the terminal on the flexible cable using a clip, etc., when using an
ungrounded soldering iron.
Note : After shorting the laser diode according to the procedure above, remove the solder according
to the text explanation.

Short circuit land

Laser pick-up unit

Flexible cable

Shorting

Shot with the rclip

1-4

TH-A10R/TH-A10

Disassembly method

<Main body>

Removing the top cover

(See Fig.1 and 2)

1.

Remove the four screws A attaching the top cover
(Use an Allen wrench).

2.

Lift up the front part of the top cover to release the
two joints a and remove the top cover toward the
front.

Removing the rear cover (See Fig. 3)

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

1.

Remove the four screws B attaching the rear cover
on the back of the body. Pull out the rear cover
backward.

Joints a

A

Top cover

A

Fig.1

Top cover

Removing the right and left side covers

(See Fig. 4 and 5)

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

1.

Move the left side cover backward to release the five
joint hooks b and remove the left side cover outward.

2.

Remove the right side cover in the same way.

Right side cover

B

Joint a

B

Fig.2

Rear cover

Fig.3

Left side cover

B

B

Joints b

Joints b

Fig.4Fig.5

1-5

TH-A10R/TH-A10

Removing the front panel assembly

(See Fig. 6 to 9)

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

1.

Disconnect the harness from connector CN802 on
the main board on the upper side of the body.

2.

Remove the two screws C on the upper side of the
body.

3.

Remove the three screws D on the bottom of the
body.

4.

Release the five joints c and detach the front panel
assembly toward the front.

C

Joint c

Joint c

CN802

Front panel assembly

Fig.6

C

Joint c

D

Front panel assembly

Joint c

Fig.7

D

Joint c

1-6

Front panel assembly

Front panel assembly

Fig.8Fig.9

Removing the right and left corner
covers (See Fig.10 and 11)

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

It is not necessary to remove the front panel
assembly.

1.

Move the left corner cover backward to release the
three joint hooks d.

2.

Remove the right corner cover in the same way.

Removing the rear panel

(See Fig.12 to 14)

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

1.

Remove the eighteen screws E and the one screw F
attaching the rear panel.

Left corner cover

Joint d

Joints d

TH-A10R/TH-A10

Joints d

Fig.10

Joint d

Right corner cover

Fig.11

2.

Release the two joints e on both sides of the body.

Joint e

E

E

F

E

E

Fig.12

E

Rear panel

E

E

Joint e

Rear panel

Rear panel

Fig.12Fig.12

1-7

TH-A10R/TH-A10

Removing the DVD servo control board

(See Fig.15 to 17)

Prior to performing the following procedure,
remcover and the right side cover.ove the top cover,
the rear

1.

Remove the three screws G and pull the DVD servo
control board case upward.

2.

Disconnect the harness from connector CN501 and
CN503, and the card wire from CN101, CN103 and
CN502 of the DVD servo control board on the
underside of the DVD servo control board case.

3.

Remove the four screws H attaching the DVD servo
control board.

Digital I / O board

CN687

CN501

Analog I / O board

CN681

CN201

DVD servo control board (case)

Fig.15

CN503

CN502

G

DVD servo control board case

DVD servo control board

H

DVD servo control board case

CN103

Fig.16

H

Fig.17

CN101

H

H

1-8

TH-A10R/TH-A10

Removing the analog I / O board / the
digital I / O board (See Fig.18 and 19)

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

1.

Remove the two screws E attaching the analog I / O
board on the back of the body.

2.

Disconnect the card wire from connector CN201 on
the analog I / O board.

3.

Remove the four screws E attaching the digital I / O
board on the back of the body.

4.

Disconnect the card wire from connector CN681 and
CN687 on the digital I / O board.

Removing the tuner board / the sub
board (See Fig.20 and 21)

Digital I / O board

CN687

E

Analog I / O board

CN681

E

CN201

DVD servo control board (case)

Fig.18

E

G

Rear panel

Prior to performing the following procedure, remove
the top cover, the rear cover and the DVD servo
control board case.

1.

Remove the two screws E attaching the tuner board
on the back of the body.

2.

Disconnect connector CN111 on the tuner board
from the sub board.

3.

Disconnect connector CN131 on the sub board from
the main board.

Sub board

Sub board

CN111

Fig.19

Tuner board

CN131

E

Fig.20Fig.21

1-9

TH-A10R/TH-A10

Removing the DVD mechanism assembly

(See Fig.22 and 23)

Prior to performing the following procedure, remove
the top cover, the rear cover, the front panel
assembly, the DVD servo control board case, the
analog I / O board, the digital I / O board and the
tuner board.

1.

Disconnect the harnesses from the spacer on the
upper side of the DVD mechanism cover.

2.

Remove the two screws I and the one screw J
attaching the DVD mechanism cover.

3.

Remove the two screws K attaching the DVD
mechanism assembly.

4.

Remove the DVD mechanism assembly upward
while pulling it backward.

K

I

DVD mechanism assembly

DVD mechanism cover

J

Spacer

Fig.22

K

I

Removing the power board

(See Fig.24 and 25)

Prior to performing the following procedure, remove
the top cover, the rear cover, the front panel
assembly, the DVD servo control board case and the
digital I / O board.

1.

Disconnect the harness from the spacer on the
upper side of the DVD mechanism cover.

2.

Remove the two screws E attaching the power
board on the back of the body.

3.

Disconnect the harness from connector CN911 and
CN912 on the power board.

4.

Remove the four screws L attaching the power
board.

5.

Disconnect connector CN913 and CN914 of the
power board from the main board by pulling out them
respectively.

Fig.23

Rear panel

Fig.24

Power transformer assembly

CN911,CN912

L

M

L

E

E

1-10

Power board

CN914

CN913

Spacer

L

Fig.25

TH-A10R/TH-A10

Removing the power transformer assembly

(See Fig.24 and 25)

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

1.

Disconnect the harnesses from connector CN911
and CN912 on the power board.

2.

Remove the two screws M attaching the power
transformer assembly.

3.

Remove the screw E attaching the power
transformer assembly on the back of the body.

Removing the main board (See Fig.26)

Prior to performing the following procedure, remove
the top cover, the rear cover, the front panel
assembly, the rear panel, the DVD mechanism
assembly, the power board and the sub board.

1.

Remove the four DVD spacers on the upper side of
the main board.

2.

Remove the five screws N attaching the main board.

M

L

Power board

Rear panel

Fig.24

CN911,CN912

L

Fig.25

L

CN914

E

CN913

E

Spacer

<Front panel assembly>

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

Removing the power switch board

(See Fig.27)

1.

Dithe harness from connector CN705 on the power
switch board.sconnect

2.

Remove the three screws O attaching the power
switch board.

N

Mainboard

IC board

Fig.26

R

N

N

CN706

Power switch board

O

O

S

Fig.27

LED board

1-11

TH-A10R/TH-A10

Removing the eject board (See Fig.28)

1.

Disconnect the harness from connector CN702 on
the eject board.

Eject board

Switch board

2.

Remove the three screws P attaching the eject
board.

Removing the LCD board (See Fig.29)

1.

Remove the four screws Q attaching the LCD board.

2.

Unsolder WA701, WA703 and WA704 on the LCD
board.

Removing the IC board (See Fig.27)

1.

Remove the screw R attaching the IC board.

2.

Disconnect the harness from connector CN706 on
the IC board.

Removing the LED board (See Fig.27)

P

CN702

WA701

Q

Q

T

Fig.28

LCD board

Fig.29

Q

WA704

WA703

Q

Prior to performing the following procedure, remove
the LCD board and the IC board.

1.

Disconnect the harness from connector CN705 on
the power switch board.

2.

Remove the two screws S attaching the LED board.

Removing the switch board (See Fig.28)

Prior to performing the following procedure, remove
the LCD board.

1.

Disconnect the harness from connector CN702 on
the eject board.

2.

Remove the two screws T attaching the switch
board.

IC board

S

R

Fig.27

CN706

Power switch board

O

O

LED board

1-12

TH-A10R/TH-A10

<Removing DVD mechanism unit>

Removing the clamper base (refer to Figure 1)
o Remove the top cover.
o Remove the DVD mechanism unit.

1. Remove the two screws at A fixing the clamper base.

Removing the loading tray (refer to Figures 2 - 4)
o Remove the clamper base.

1. Turn the up-down cam lever clockwise (in the direction
of the arrow in Figure 2) to lower the position of the mechanism.

2. Manually set the loading tray to the fully-open position.

3. Stretch the tray stoppers on both sides of the loading
base outward and pull out the tray.

Loading tray

Clamper base

Figure 1

Loading tray (front side)

Tray stopper

Loading tray

Loading base

Loading base

Up-down cam

Lever

Figure 2

Loading tray

Push

Push

Tray stopper

Figure 4

Figure 3

1-13

TH-A10R/TH-A10

Removing the traverse mechanism unit (refer to Figure 5)
o Remove the loading tray.

1. Remove the three screws at B fixing the traverse
mechanism unit.

Traverse mechanism unit

Protecting the optical pickup
o Solder the flexible ground point on the optical pickup
when replacing the pickup or before detaching the
mechanism control board. When assembling the unit,
remove the solder last.

Removing the mechanism control board
(refer to Figures 6 - 7)

o Remove the traverse unit. (Can be detached without
detaching the T-mechanism unit.)

1. Remove the two screws at C fixing the mechanism
control base from the bottom of the traverse unit.

2. Pull out the CN12 connector and detach the
mechanism control board.

3. Remove the card wire from the CN13 connector
on the mechanism control board.

4. Pull out the FPC holder from the CN12 connector
on the reverse side of the mechanism control board
and remove the flexible harness, referring to Figure 7.

B

Enlargement

Figure 5

Traverse mechanism unit

CN12

B

B

C

CN13

Connection area

(Solder the flexible
ground point)

Flexible harness

3

Enlargement

FPC holder

Figure 7

Mechanism control board

Figure 6

Flexible harness

2

1

CN12

Mechanism control board

1-14

TH-A10R/TH-A10

Removeing the turntable and spindle motor assemby
(refer to Figures 8 - 9)

o Remove the traverse mechanism unit.
o Solder the flexible ground point on the optical pickup.
(Figure 6)

o Remove the mechanism control board.

1. Remove the flexible harness from the feed motor
connector on the spindle motor board assembly.

2. Remove the three screws at D fixing the spindle motor
from the bottom of the traverse chassis.

Removing the feed motor unit (refer to Figure 9)
o Remove the traverse mechanism unit.
o Remove the mechanism control board.

1. Remove the FPC from the feed motor connector
on the turntable spindle motor board.

2. Remove the two screws at E fixing the feed motor unit.

Removing the optical pickup unit (refer to Figure 9)
o Remove the traverse mechanism unit.

Guide shaft B

o Remove the mechanism control board.
o Remove the feed motor unit.

1. Remove the screw at F fixing the guide shaft holder at B,
then simultaneously remove the guide shaft at B and the

optical pickup unit. While doing so, slide the unit
horizontally away from the guide shaft at A.

Traverse chassis

D

Figure 8

Traverse mechanism unit

F

Pick-up assembly

E

Guide shaft A

E

Feed motor assembly

Flexible harness

Feed motor connector

Turn table spindle motor unit

Figure 9

1-15

TH-A10R/TH-A10

Removeing the loading mechanism parts
(refer to Figures 10 - 11)

o Remove the clamper base.
o Remove the disk tray.

1. Turn the lever counterclockwise until it stops (position 1),

while pushing the switch lever in the direction of the
arrow and pushing up the pawl at A using a screwdriver.

2. Stretch the two pawls at B outward using a screwdriver

and remove the chassis.

3. Turn the lever clockwise (position 2) to remove the

up-down cam.

4. Remove the pulley gear and the pulley gear belt after

removing the screw at G fixing the pulley gear.

5. Pull out drive gear 2 then drive gear 1.

(1)When detaching

Removing the loading motor board

the chassis.

(refer to Figures 11 - 12)
o Remove the clamper base.
o Remove the disk tray.

1. Remove the loading belt.

2. Remove the two screws at H fixing the loading motor.

3. Remove the screw at I and the three pawls at C fixing

the loading motor base from the reverse side of the
loading base.

Up-down cam

Pawl B

G

chassis.

G

Lever

1

Up-down cam

Figure 10

Loading base

2

Pawl A

Chassis

Pawl B

Switch lever

(2)When detaching
the up-down cam.

Up-down cam

Switch lever

G

H

Loading motor unit

Loading base

H

Loading belt

Loading base

Drive gear 1

Drive gear 2

G

Pulley gear

Figure 11

Loading motor board

I

Pawl C

1-16

Figure 12

TH-A10R/TH-A10

Disassembly method

<Speaker>

Removing the amplifier assembly

(See Fig.1)

1.

Remove the twelve screws A attaching the amplifier
assembly on the back of the body.

2.

Move the amplifier assembly backward and
disconnect the harness from connector CN109 in the
lower part of the amplifier assembly.

Removing the heat sink cover and the
amplifier cover (See Fig.2 and 3)

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

1.

Pull out the volume knob.

2.

Remove the four screws B attaching the heat sink
cover.

AA

CN109

Volume knob

A

Amplifier
assembly

A

Fig.1

B

Amplifier
assembly

3.

Remove the twenty screws C and the one screw D
attaching the amplifier cover.

Amplifier
cover

D

C

C

Fig.2

Heat sink
cover

B

C

Amplifier
assembly

CC

Fig.3

Amplifier
cover

C

C

1-17

TH-A10R/TH-A10

Removing the front panel assembly

(See Fig. 6 to 9)

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

1.

Disconnect the harness from connector CN802 on
the main board on the upper side of the body.

2.

Remove the two screws C on the upper side of the
body.

3.

Remove the three screws D on the bottom of the
body.

4.

Release the five joints c and detach the front panel
assembly toward the front.

C

Joint c

Joint c

CN802

Front panel assembly

Fig.6

C

Joint c

D

Front panel assembly

Joint c

Fig.7

D

Joint c

1-18

Front panel assembly

Front panel assembly

Fig.8Fig.9

Removing the right and left corner
covers (See Fig.10 and 11)

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

It is not necessary to remove the front panel
assembly.

1.

Move the left corner cover backward to release the
three joint hooks d.

2.

Remove the right corner cover in the same way.

Removing the rear panel

(See Fig.12 to 14)

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

1.

Remove the eighteen screws E and the one screw F
attaching the rear panel.

Left corner cover

Joint d

Joints d

TH-A10R/TH-A10

Joints d

Fig.10

Joint d

Right corner cover

Fig.11

2.

Release the two joints e on both sides of the body.

Joint e

E

E

F

E

E

Fig.12

E

Rear panel

E

E

Joint e

Rear panel

Rear panel

Fig.12Fig.12

1-19

TH-A10R/TH-A10

Removing the DVD servo control board

(See Fig.15 to 17)

Prior to performing the following procedure,
remcover and the right side cover.ove the top cover,
the rear

1.

Remove the three screws G and pull the DVD servo
control board case upward.

2.

Disconnect the harness from connector CN501 and
CN503, and the card wire from CN101, CN103 and
CN502 of the DVD servo control board on the
underside of the DVD servo control board case.

3.

Remove the four screws H attaching the DVD servo
control board.

Digital I / O board

CN687

CN501

Analog I / O board

CN681

CN201

DVD servo control board (case)

Fig.15

CN503

CN502

G

1-20

DVD servo control board case

CN103

Fig.16

DVD servo control board

H

DVD servo control board case

Fig.17

CN101

H

H

H

Main Adjustment

Adjustment and confirmation matter

(1) Auto adjustment method

If microprocessor (IC401, IC402, IC714, IC716) or DVD Prek-up is replaced, initialize

the DVD player in the following matter:

1. Initialize the DVD player in the following matter:

1) Make sure that no disc is on the tray.

2) Insert the power pulag to the outret while pressing "PLAY" and "OPEN/CLOSE" button at the
same time.
FL Display indicate ; Region cord.

3) Press Enter button. And EEPROM initialize start.

4) When indicate "96kHz EEPROM" on the display , initialize finished.

Note : During the EEPROM initialization the keys may not be operated.

Press the "POWER" key to initiate the STAND-BY mode and the test mode will then
be cancelled.

TH-A10R/TH-A10

(2) Confirmation of DVD RF level

1.The oscilloscope is connected between "1"(RFOP) of
CN104 and "2"(GND).

2.Reproduction of the test disc (VT-501)
made by JVC.

3.It is confirmed that RF LEVEL is 350mVp-p 150mVp-p.

4.When there is disorder in the waveform road cuts etc,
test disk is exchanged and measured.

(3) Confirmation of CD jitter level and RF level

1. The CD jitter meter is connected between "11"(GND)
of CN104 and "12"(FLTOUT).
The RF level is observed at the same time.

2.The first test disk(CTS-1000) made of JVC is reproduced.

3.It is confirmed that RF LEVEL is 360 100mVp-p.

5. When there is disorder in the waveform road cuts
etc, test disk is exchanged and measured.

P12
and

GND

DVD SERVO CONTROL PWB

P1

and

GND

FRONT SIDE

1-21

TH-A10R/TH-A10

(4) Flap adjustment of the Pick-up guide shaft

1) Make sure that there is no disc on the tray.

2) Press both the "PLAY" and "OPEN/CLOSE" keys of the main unit to activate the primary
power and ∗ ∗ ( ∗ ∗ ; Version3, ; Region cord) will be displayed on the FL indicator.

Note: If the FL indicator display stops and remains at "TEST 0", unplug the power

cord from the outlet and after waiting at least 1 second, plug it in again. After
the tray open/close procedure has completed, unplug it again and then
perform the initialization procedure again.

3) Press the "OPEN/CLOSE" key of the main unit to draw the tray out.
*Place the test disk (VT-501) on the tray and then press the "OPEN/CLOSE" key.

(Note: Pushing the tray to close it is not possible.)

4) Press the "PLAY" key of the main unit.

5) The "JIT 0000" is displayed on the FL indicator.
Set the FL indicator figure value to its minimum by adjusting the pickup guide shaft flap.
* The test mode is cancelled when the power is turned off.

Measurement

Measurement machine

No need

General tool : Hex-head wrench (1.27 mm)

Adjustment point

Refer to Fig.2

connections

Refer to Fig.1

Mode

Reproduction

part

Extension cord No.

QUQ110-3740AM

Disc

VT-501

"Flap adjustment" of the Pick-up guide shaft adjusts
"Tangential adjustment machine screw" A and
"Tilt adjustment machine screw" B from the
DVD Mechanism A'ssy bottom.

1. The part at the center on the DVD test disc is
reproduced.

2.The flap adjustment screws is turned alternately
and adjusted like clearly seeing the waveform of
CN104"1" to the way.

Note

1.The tangential adjustment is done finish and,
then, tilt is adjusted.

2.The repeat the adjustment 2-3 times,for best
result.

3.The final adjustment should be tilt adjustment.

Extension Cord

DVD Mechanism A'ssy

CN11 of

Stand

Connection PWB

CN101 of DVD Servo Control PWB

DVD player

Stand

200mm

Fig.1

1-22

TH-A10R/TH-A10

Confirmation after adjustment.

Confirm to reproduce video CD and CD after
the DVD test disc is adjusted and to find abnormality.

B

Fig.2

A

A

(5) About keeping the disc

As for the DVD test disc, plane accuracy is demanded.Please note the keeping place on the disc.

1. Please do not put the disc directly on the work desk etc. after uses .

2. To keep the planarity of the disc, politely handle ,and please put in a special case and keep
the disc vertically after uses .
Please keep keeping the disc in a cool place where direct sunshine and the air-conditioning
wind do not drive.

3. When the disc curves,an accurate adjustment cannot be done.

Please exchange for a new test disc and adjust optics.

4. Other discs might not be able to be reproduced when adjusting on a curved disc.

Point of adjustment
* Please execute the static electricity protection measures before starting the adjustment.
* When the following parts are exchanged,optical adjustment "Adjust the flap of the disc motor"
is necessary.

1.The disc motor was exchanged.

2.The laser pick up was exchanged.

3.The traverse motor unit was exchanged.

Note

Additionally, please adjust the flap of the disc motor when the picture quality
deterioration is seen .The basic adjustment though, is unnecessary for part exchange
in the traverse.

An optical adjustment in the laser pick up cannot be done.

Please adjust the flap of the disc motor after exchanging the laser pick up.

* When the traverse unit is exchanged, the adjustment is basically unnecessary.

1-23

TH-A10R/TH-A10

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.

Short-circuit

1-24

Discription of major IC's

AL4527 (IC601): A/D, D/A Converters

1. Terminal layout

CDTO

CDTI

CCLKCSPIS

TH-A10R/TH-A10

XTO

XTI

AVSS

AVDD

VREFH

VCOM

2. Block diagram

LIN+
LIN-

SDOS
OCKS
MIS
BCLK
LRCK
SDTI1
SDTI2
SDTI3
SDTO
DAUX
DFS

4443424140393837363534

1
2
3
4
5
6
7
8
9
10
11

1213141516171819202122

DEM1

DEM0

MCKO

DVDD

ADC

DVSSPDXTS

HPF

ICKS1

ICKS0

CAD1

Audio
I/F

33
32
31
30
29
28
27
26
25
24
23

CAD0

VREFL
RIN+
RIN­LIN+
LIN­ROUT1
LOUT1
ROUT2
LOUT2
ROUT3
LOUT3

RIN+
RIN-

LOUT1

ROUT1

LOUT2

ROUT2

LOUT3

ROUT3

LPF

LPF

LPF

LPF

LPF

LPF

ADC

DAC

DAC

DAC

DAC

DAC

DAC

HPF

DATT

DATT

DATT

DATT

DATT

DATT

LRCK

BICK

MCLK

SDOUT

SDIN1

SDIN2

SDIN3

DAUX

Format

Converter

SDOS

SDTO

SDTI1

SDTI2

SDTI3

1-25

TH-A10R/TH-A10

3. Pin 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

SDOS
OCKS
MIS
BCLK
LRCK
SDTI1
SDTI2
SDTI3
SDTO
DAUX
DFS
DEM1
DEM0
MCKO
DVDD
DVSS
PD
XTS
ICKS1
ICKS0
CAD1
CAD0
LOUT3
ROUT3
LOUT2
ROUT2
LOUT1
ROUT1
LIN­LIN+
RIN­RIN+
VREF
VCOM
VREFH
AVDD
AVSS
XTI
XTO
PIS

CS

CCLK

CDTI

CDTO

Symbol

I/O

SDTO source select terminal L: Internal ADC output H: DAUX input

I

Serial control mode select terminal L: 3-wire serial H: IC bus

I

Soft mute terminal H: Starting Soft mute L: Cancel

I

Audio serial data clock terminal

I

Input channel clock terminal

I/O

DAC1 audio serial data input terminal

I

DAC2 audio serial data input terminal

I

DAC3 audio serial data input terminal

I

Audio serial data output terminal

O

Auxiliary audio serial data input terminal

I

2x sampling mode terminal L: Ordinal speed H: 2x speed

I

De-emphasize 1 terminal

I

De-emphasize 2 terminal

I

Power terminal for output buffer 2.7 5.5 V

­Digital power supply terminal 4.5 5.5 V

­Digital ground terminal 0 V

­Power down & reset terminal L: Power is down and register is initialized.

I

Input clock selection 2 terminals

I

Input clock selection 1 terminals

I

Input clock selection 0 terminals

I

Chip address 1 terminal

I

Chip address 0 terminal

I

DAC3 L channel analog output terminal

O

DAC3 R channel analog output terminal

O

DAC2 L channel analog output terminal

O

DAC2 R channel analog output terminal

O

DAC1 L channel analog output terminal

O

DAC1 R channel analog output terminal

O

L channel analog reverse input terminal

I

L channel analog non-reverse input terminal

I

R channel analog reverse input terminal

I

R channel analog non-reverse input terminal

I

Zero input detection terminal L: P/S = H

O

COMMON voltage output terminal

O

Reference voltage input terminal

­Analog power supply terminal 4.5 5.5 V

­Analog ground terminal 0 V

­Zero input detection terminal L: P/S = H

O

Master clock input terminal

I

Parallel/serial select terminal

I

L: Serial control mode H: Parallel control mode
Audio data interface format 0 terminal (with parallel control mode)

I

Chip select terminal (with 3-wire serial control mode)

I

Audio data interface format 0 terminal (with parallel control mode)

I

Control data clock terminal (with serial control mode)

I

Loopback mode 0 terminal (with parallel control mode)

I

Control data input terminal (with serial control mode)

I/O

Loopback mode 1 terminal

I

Functions

1-26

AK93C65AF-X (IC403) : EEPROM

1.Terminal layout

TH-A10R/TH-A10

PE

VCC

CS

SK

2.Block diagram

DI

CS

INSTRUCTION

1

2

3

4

8 PIN SOP

REGISTER

8

7

6

5

INSTRUCTION

GENERATION

NC

GND

DO

DI

DECODE,

CONTROL

AND

CLOCK

DATA

REGISTER

ADD.

BUFFERS

16

R/W AMPS

AND

AUTO ERASE

DECODER

DO

16

EEPROM

4096bit

256 x 16

SK

PE

3.Pin function

Pin no. Symbol
1 PE
2 VCC
3 CS
4 SK
5 DI
6 DO
7 GND
8 NC

Function
Program enable (With built-in pull-up resistor)
Power supply
Chip selection
Cereal clock input
Cereal data input
Cereal data output
Ground
No connection

NOTE : The pull-up resistor of the PE pin is about 2.5M (VCC=5V)

VREF

VPP SW

VPP

GENERATOR

1-27

TH-A10R/TH-A10

AN8706FHQ (IC101) : Front end processor

1.Pin layout

CBDOSL

CSAG

DCAGC

AGCG

PEAK

BOTTOM

RFENVFCBOOST

OFTR

BDO

JITOUT

75747372717069686766656463626160595857565554535251

RBCA

RFINP
RFINN

VCC2

GND2

VREF2

RFON
RFOP

TS

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

GND3

FUPDN

ITDLI

VCOIN

PLFLT

PLFLT2

FCPO

PCPO

VCC3

CAPA

DTRD

IDGT

VCC5

50

RDCKP

49

RDCKN

48

RDTP

47

RDTN

46

GND5

45

GND4

44

VCC4

43

DTMONN

42

DTMONP

41

DSLFLT

40

DSLO

39

FLTOUT

38

DCFLT

37

VREF3

36

VPWBDO

35

VPWOFT

34

IDDLY

33

DBAL

32

GND1

31

VREF1

30

TKCNT

29

TKCFLT

28

TEOUT

27

TEI

26

RSCL

2.Block diagram

Head Amp.
SSD Signal

Head Amp.
DPD Signal

12345678910111213141516171819202122232425

TG

LPCOA

LDONB

LDONA

LPC1

VHARF

RFOUT
FS/TS

PTH

POFLT

TGBAL

TBAL

FBAL

FGCTL

FEN

VREFL

FEOUT

PULIN

VREFC

VREFH

TGTETKCNTTBALFBALFE

SEN

SCK

STDI

FC/Boost
AGC Cont

TKCNT

FE(SSD)
FE BAL

AGC EQ

MU

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

1-28

TG(DPD)

LPC(Amp)

OPTICAL HEAD

(650nm)

INTERFACE

VREF reg

TGBAL CPU STNBY MTRON

SERVO PROCESSOR
Head Amp.

TH-A10R/TH-A10

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

TG

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

I

Laser ON (CD Head) terminal

I

Laser ON (DVD Head) terminal

O

Laser drive output terminal

I

Laser PIN input terminal

O

VHALF voltage output terminal

I

Tangential phase balance control terminal

O

Track detection Threshold value level terminal

I

Track detection Threshold value level terminal

I

Tracking balance control terminal

O

Tangential phase error signal output terminal

I

Focus amplifier Gain control terminal

I

Focus balance control terminal

O

Focus error signal output terminal

I

Focus error output amplifier reversing input terminal

O

VREFL voltage output terminal

O

VREFC voltage output terminal

O

VREFH voltage output terminal

I

DSL,PLL drawing mode switch terminal

I

SEN(Cereal data input terminal)

I

SCK(Cereal data input terminal)

I

STDI(Cereal data input terminal)

I

Standby mode control terminal

I

Tracking OFF holding input terminal

I

Monitor output ON/OFF switch terminal

I

ROM . RAM switch terminal

O

Standard current source terminal

I

Tracking error output Amp reversing input terminal

O

Tracking error signal output terminal

O

Track count detection filter terminal

O

Track count output terminal

O

VREF1 voltage output terminal

O

Earth terminal 1

I

Data slice offset adjustment terminal

I

Data slice delay adjustment terminal

I

OFTR detection level setting terminal

I

BDO detection level setting terminal

O

VREF3 voltage output terminal

O

Capacity connection terminal for data slice input filter

O

Filter amplifier output terminal

O

Data slice single data output terminal

O

Constant filter terminal when data is sliceddelly

O

PLL differential motion 2 making to value edge signal moniter output (+)

O

PLL differential motion 2 making to value edge signal moniter output (-)

I

Power terminal 4 (5V)

O

Earth terminal 4

O

Earth terminal 5

O

PLL differential motion making to synchronization RF signal reversing output

O

PLL differential motion making to synchronization RF signal rotation output

O

PLL differential motion making synchronization clock reversing output

O

PLL differential motion making synchronization clock rotation output

AN8706FHQ (1/2)

1-29

TH-A10R/TH-A10

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

FC

RFENV

BOTTOM

PEAK

AGCG

DCAGC

CSAG
CBDOSL
CBDOFS

RBCA

TESTSG

RFINP
RFINN

VCC2

GND2

VREF2
COFTFS
COFTFL

RFON
RFOP

TS

DCRF

FS
VIN6
VIN5

VCC1

VIN1
VIN2
VIN3
VIN4

VREF4

DIFP
DIFN

I/OPin No. Symbol Functions

Power terminal 5 (3.3V)

I

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

I

Data slice data read signal input terminal(For RAM)

I

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

I

Power terminal 3 (5V)

I

PLL phase gain set terminal

O

PLL frequency gain set terminal

O

PLL low region filter terminal

O

PLL high region filter terminal

O

PLL VCO input terminal

I

PLL jitter free current ripple removal filter terminal

O

PLL frequency control input terminal

I

Earth terminal 3

O

Detection signal output of jitter

O

BDO output terminal

O

OFTR output terminal

O

Booth control terminal for filter

I

FC control terminal for filter

I

RF enve output terminal

O

Bottom enve detection filter terminal

O

Peak enve detection filter terminal

O

AGC amplifier gain control terminal

O

AGC amp filter terminal

O

Sag cancellation circuit filter terminal

O

BDO detection capacitor terminal

O

BDO detection capacitor terminal

O

BCA detection level setting terminal

O

TEST signal input terminal

I

RF signal positive moving input terminal

I

RF signal reversing input terminal

I

Power terminal 2 (5V)

I

Earth terminal 2

O

VREF2 voltage output terminal

O

OFTR detection capacitor terminal

O

OFTR detection capacitor terminal

O

RF signal output terminal P

O

RF signal output terminal N

O

All addition amplifier (DVD) output terminal

O

All addition amplifier capacitor terminal

O

All addition amplifier (CD) output terminal

O

Focus input of external division into two terminal

I

Focus input of external division into two terminal

I

Power terminal 1 (5V)

I

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

I

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

I

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

I

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

I

VREF4 voltage output terminal

O

RF signal (RAM) output terminal P

O

RF signal (RAM) output terminal N

O

AN8706FHQ(2/2)

1-30