JVC VS-DT88V Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

VS-DT88V

Area suffix

UF ---------------------------- China

VS-DT88V

STANDBY/ON

123

FM/AM

4

6

5

MD/AUX

9

8

7

10

+10

CANCELMPX

VCD No. VCD No.

SET

ON

PBC

SCREEN

TREBLEBASSAHB PRO

PREV. CD SELECT NEXT

VIDEO

HIGH

INTRO

LIGHT&RETURN STILL

CLOCK

SLEEPDIMMER

REPEAT

/TIMER

FM

PLAY

MODE

OPEN

DISPLAY

COLOR

/CLOSE

VOLUME

Contents

Safety precautions Preventing static electricity Important for laser products Disassembly method Flow of functional operation until TOC read

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

1-15

COMPACT COMPONENT SYSTEM

SP-VSDT88VCA-VSDT88VSP-VSDT88V

Maintenance of laser pickup Replacement of laser pickup Description of major ICs

1-16 1-16 1-17~34

No.21179

Sep. 2002

VS-DT88V

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 each exposed 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.

!

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. (This regulation does not correspond to J and C version.)

1-2

VS-DT88V

Preventing static electricity

1. Grounding to prevent damage by 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.

2. About the earth processing for the destruction prevention by static electricity

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

2-1 Ground the workbench

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.

2-2 Ground yourself

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

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.

4. 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.

Remove solder of the short land on the flexible wire 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 wire 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.

5. Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the CD pickup unit.

Flexible wire

Apply solder to the short land before the flexible wire is disconnected from the connector CN601 on the (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire.

CD servo board

.

CN601

Short land

CD servo board

1-3

VS-DT88V

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.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

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.

CAUTION

!

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

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1

LASER PRODUCT

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

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

interlock failed or defeated.

AVOID DIRECT EXPOSURE

TO BEAM. (e)

CAUTION: Invisible laser

radiation when open and

ADVARSEL: Usynlig laser-

stråling ved åbning, når

sikkerhedsafbrydere er ude

af funktion. Undgåudsæt-

telse for stråling. (d)

VARNING: Osynlig laser-

strålning när denna del är

öppnad och spärren är

urkopplad. Betrakta ej

strålen. (s)

VARO: Avattaessa ja

suojalukitus ohitettaessa

oleta lttiina näkymättö-

mälle lasersäteilylle.

Älä katso

säteeseen. (f)

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

VARO: Avattaessa ja suojalukitus ohitettaessa oleta lttiina näkymättömälle lasersäteilylle. Älä katso

säteeseen. (f)

1-4

VS-DT88V

Disassembly method

Removing the top lens (See Fig. 1.)

From the top side of the main body, remove the four screws A attaching the top lens.

Removing the bottom panel

(See Figs. 2 and 3.)

1.

From the rear side of the main body, remove the three screws B attaching the bottom panel.

(See Fig.2.)

2.

From the bottom side of the main body, remove the two screws C attaching the bottom panel.

(See Fig.3.)

3.

Remove the bottom panel in an upward direction.

Top lens

AA

Fig.1

Top panel

Bottom panel

B

Fig.2

C

Removing the top panel (See Fig. 4.)

Remove the top lens. Remove the bottom panel.

1.2.Slide the top panel toward the rear (direction of the arrow), disengage it from the engagement sections a of the front panel assembly and engagement sections b of the bottom chassis.

Remove the top panel in an upward direction.

Bottom panel

Fig.3

Top panel

bb

Front panel assembly

Fig.4

a

1-5

VS-DT88V

Removing the CD&Video CD mechanism assembly (See Fig. 5.)

Remove the top lens. Remove the bottom panel. Remove the top panel.

1.

From the top side of the main body, disengage the claw c of the CD&Video CD mechanism assembly and then remove the push button.

2.

Remove the five screws D, screw E and screw F attaching the CD&Video CD mechanism assembly.

3.

Disconnect the wire from connector CN801 on the LED board.

4.

Remove the CD&Video CD mechanism assembly in an upward direction.

Removing the front panel assembly

(See Figs. 6 and 7.)

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly.

1.

Remove the tie band bundling the wires of the front panel assembly. (See Fig.6.)

CN801

LED board

F

Main board

Wire holder

D

Claw c

CN171

CN183

Push button

Fig.5

CN182

CD&Video CD mechanism assembly

D

E

Bottom chassis

Tie band

2.

Disconnect the wires from connectors CN106 and CN182 on the main board. (See Fig.6.)

3.

Disconnect the card wires from connectors CN171 and CN183 on the main board. (See Fig.6.)

4.

Remove the wire holder holding the card wire of the front panel assembly. (See Fig.6.)

5.

From the front side of the main body, remove the two screws G attaching the front panel assembly.

(See Fig.7.)

6.

Disengage the claws d of the front panel assembly from the bottom chassis and then remove the front panel assembly in the direction of arrow.

(See Fig.6.)

[Reference] Before attaching the front panel assembly, pass the card wire of the front panel assembly through the hole on the bottom chassis. After attaching the front panel assembly, bundling the card wire and wires of the front panel assembly using a wire holder and tie band.

Claws d

G

Fig.6

Fig.7

CN106

Front panel assembly

Claws d

Front panel assembly

1-6

Removing the tuner board

(See Figs. 8 and 9.)

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly.

1.

Disconnect the card wire from connector CN111 on the main board. (See Fig.8.)

2.

Disconnect the wire from connector CN190 on the tuner board. (See Fig.8.)

3.

From the rear side of the main body, remove the two screws H attaching the FM/AM antenna terminals on the tuner board. (See Fig.9.)

4.

Take out the tuner board from the bottom chassis.

Wire clamp

Speaker board

CN103

CN102

Tuner board

Bottom chassis

Notch

Tie band

CN190

CN111

VS-DT88V

CD & Video CD mechanism wire

CN101

Fig.8

Tie band

Main board

Removing the speaker board

(See Figs. 8 and 9.)

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly.

1.

Remove the tie bands bundling the wires on the speaker board. (See Fig.8.)

2.

Disengage the wire clamp bundling the wire of the CD&Video CD mechanism wire. (See Fig.8.)

3.

Disconnect the wires from connectors CN101, CN102 and CN103 on the speaker board.

(See Fig.8.)

4.

From the rear side of the main body, remove the four screws J attaching the speaker/digital out terminals on the speaker board. (See Fig.9.)

5.

Take out the speaker board from the bottom chassis.

[Reference] After connecting the wires to the speaker

board, bundle them using a tie band. Insert the CD&Video CD mechanism assembly wire into the notch on the bottom chassis. (See Fig. 8.)

Rear panel

Speaker terminal Digital out terminal

JH

Fig.9

FM antenna terminal

AM antenna terminal

H

1-7

VS-DT88V

Removing the main board

(See Figs. 10 to 12.)

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly. Remove the front panel assembly. Remove the tuner board. Remove the speaker board.

1.

From the bottom side of the bottom chassis, remove the screw K attaching the main board.

(See Fig.10.)

2.

Disengage the wire clamp bundling the wire of the power transformer. (See Fig.11.)

3.

Disconnect the wires from connectors CN181, CN191 and CN194 on the main board.

(See Fig.11.)

4.

Disconnect the wire from connector CN192 on the power amplifier board.(See Fig.11.)

5.

Remove the screw L, which retains the main board, together with the wire holder. (See Fig.11.)

6.

Remove the two screws M, screw M' and screw N attaching the main board. (See Fig.11.)

7.

Remove the two screws P attaching the main board and then remove the rear panel. (See Fig.12.)

K

Main board

M

N

Wire holder

Bottom chassis

Fig.10

Bottom chassis

Wire clamp

CN191

CN194

CN181

LM'

CN192

Earth wire

Power transformer

Power amplifier board

M

8.

Take out the main board with the power amplifier board from the bottom chassis.

[Reference] Attaching the main board When attaching the screw M', attach the earth wire of the main board at the same time. When attaching the screw L, also attach the wire holder together with it.

Removing the power amplifier board

(See Fig. 13.)

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly.

1.2.Disconnect the wires from connectors CN192 and CN193 on the power amplifier board.

Remove the two screws Q attaching the fan motor.

[Reference] It is not necessary to remove the wire from the fan motor.

3.4.Remove the two screws R attaching the power amplifier board.

Lift the power amplifier board, disengage the two hooks e from the heat sink of the main board and take out the power amplifier board.

Rear panel

Main board

Fig.11

P

Fig.12

CN192

CN193

Power amplifier board

Fig.13

Hook e

R

Fan motor

Heat sink

Q Q

1-8

Removing the power transformer

(See Fig. 14.)

VS-DT88V

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly.

1.

Disengage the wire clamp and tie band bundling the wires of the power transformer.

2.

Disconnect the wire from connector CN192 on the power amplifier board.

3.

Disconnect the wires from connectors CN191 and CN194 on the main board.

4.

Remove the two screws S and two washers attaching the power transformer.

[Reference] After connecting the wires, bundling them using a wire clamp and tie band.

Main board

Treat the wire from the fan motor.

Fan motor

Tie band

Wire clamp

CN191

CN194

CN192

CN181

Power amplifier board

Fig.14

Power transformer

Washers

S

Fan motor

Removing the fan motor

(See Figs. 14 and 15.)

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly. Remove the front panel assembly.

1.2.Disconnect the wire from connector CN181 on the main board. (See Fig.14.)

From the right side of the main body, remove the two screws Q attaching the fan motor. (See Fig.15.)

[Reference] After mounting the fan motor, treat the wire from the fan motor as shown in fig. 14.

Q

Bottom chassis

Fig.15

1-9

VS-DT88V

Remove the top lens. Remove the bottom panel. Remove the top panel. Remove the CD&Video CD mechanism assembly. Remove the front panel assembly.

Removing the switch board

(See Fig. 16.)

From the back side of the front panel assembly, remove the four screws T attaching the switch board.

Removing the open/close board

(See Figs. 16 and 17.)

1.2.From the back side of the front panel assembly, remove the two screws U attaching the door motor assembly.

Remove the screw V attaching the open/close board of the door motor assembly.

Removing the door motor (See Fig. 16.)

Remove the door motor assembly.

1.

Remove the washers attaching the clutch assembly and gear 2.

2.

Remove the clutch assembly and Gear 2.

Door motor assembly

U

Clutch assembly

Washer

Gear 2

Front panel assembly (Back side)

T

Switch board

Front panel assembly (Back side)

Fig.16

Door motor

W

V

Open/close board

Door motor assembly

Fig.17

Rod gear assembly

f

3.

Remove the two screws W attaching the door motor.

Removing the front board

(See Figs. 18 to 21.)

1.

While widening section f of the front base in the direction of the arrow, remove the rod gear assembly. (See Fig.18.)

2.

Slide the moving panel assembly all the way in the direction of the arrow. (See Fig.18.)

3.

While slightly widening sections g toward the front, take out the moving panel assembly in the direction of the arrow. (See Fig.19.)

4.

Remove the two screws X attaching the moving base of the moving panel assembly. (See Fig.20.)

5.

Disengage the engagement sections h on the inside of the moving base and at the inside of the moving panel assembly and remove the moving base. (See Fig.20.)

6.

Remove the screw Y and screw Y' attaching the front board. (See Fig.21.)

7.

Disengage the claws i of the moving panel and remove the front board. (See Fig.21.)

[Reference] Before attaching the moving base, pass the card wire of the front board through the hole on the moving base. (See Fig.20.) When attaching the screw Y', attach the wire at the same time.

X

Y

Fig.18

Fig.19

Fig.20

Fig.21

Front base

g

Moving panel assembly

Hole

i

Y'

Front base

Moving base

Front board

Moving panel

hh

Card wire

Wire

1-10

VS-DT88V

<CD&Video CD mechanism assembly section>

Removing the LED board (See Fig. 1.)

From the top side of the CD&Video CD mechanism assembly, disengage the claw a of the top chassis attaching the LED board and then remove the LED board.

Removing the CD&Video CD

mechanism assembly (See Fig. 2.)

From the back side of the CD&Video CD

1. mechanism assembly, raise the protector in the direction of arrow.

Remove the three screws A attaching the

2. CD&Video CD mechanism assembly on the top chassis and then remove the CD&Video CD mechanism assembly.

Removing the CD servo board and

video board (See Fig. 3.)

[Caution] Be sure to solder the short land section b on the flexible wire before disconnecting the flexible wire from connector CN601 on the CD servo board. If the flexible wire is disconnected without attaching solder, the pickup unit may be destroyed by static electricity.

1.

From the back side of the CD&Video CD mechanism assembly, attach solder to the short land section b of the flexible wire that is connected to the connector CN601 of the CD servo board.

Claw a

A

Protector

LED board

Top chassis

Fig.1

CD&Video CD mechanism assembly

A

Top chassis

Fig.2

2.

Disconnect the flexible wire from connector CN601 on the CD servo board.

3.

Disconnect the card wires from connectors CN611, CN612, CN691 and CN692 on the CD servo board.

4.

Remove the two screws B attaching the CD servo board.

5.

Lift the front edge of the CD servo board slightly and disengage it from the projection c and then from the engagement section d.

[Caution] In the assembly, be sure to remove solder from the short land section b after connecting the flexible wire.

6.7.From the back side of the CD&Video CD mechanism assembly, disconnect the card wires from connectors CN101 and CN102 on the video board.

Remove the two screws C attaching the video board and then remove the video board.

Flexible wire

Projection c

Short land section b

CN612

CN601

CN691

CN611

CN692

CD servo board

Engagement section d

CN102

CN101

Video board

B

Fig.3

C

1-11

VS-DT88V

Removing the traverse mechanism

assembly (See Fig. 4.)

Remove the CD servo board and video board.

1.

Remove the two screws D attaching the CD servo board bracket.

2.

Remove the two screws E and O-rings attaching the traverse mechanism assembly.

3.

Disengage the claw e attaching the traverse mechanism assembly and then take out the traverse mechanism assembly.

Removing the pickup unit

(See Figs. 5 and 6.)

Remove the CD servo board and video board. Remove the traverse mechanism assembly.

Traverse mechanism assembly

O-ring

F

Claw e

Fig.4

Pickup unit

CD servo board

D

bracket

EE

Section f

O-ring

1.

From the top side of the traverse mechanism assembly, remove the two screws F attaching the shaft.

2.

From the traverse mechanism assembly, disengage the section f of the pickup unit and then remove the pickup unit with the C.D shaft. (See Fig.5.)

3.

Pull the C.D shaft out of the pickup unit.

(See Fig.6.)

4.

Remove the screw G attaching the rack from the pickup unit. (See Fig.6.)

5.

Remove the screw H attaching the P.S. spring from the pickup unit. (See Fig.6.)

F

C.D shaft

Traverse mechanism assembly

Fig.5

C.D shaft

Pickup unit

P.S. spring

H

G

Rack

Fig.6

1-12

VS-DT88V

Attaching the pickup unit

(See Figs. 6 to 8.)

[Reference] Refer to the explanation of "Removing the pickup unit" on the preceding page.

1.

Attach the P.S. spring and rack to the pickup unit.

(See Fig.6.)

2.

Insert the C.D shaft into the pickup unit.

(See Fig.6.)

3.

Engage the section f of the pickup unit with the traverse mechanism assembly first, and set the both ends of the C.D shaft in the grooves g and h.

(See Fig.7.)

4.

After making sure that the section j of the rack is meshed correctly with the middle gear, attach the C.D shaft using the two screws F. (See Fig.8.)

Section f

Groove g

Groove h

Fig.7

Section j

F

Removing the traverse mechanism board (See Fig. 9.)

Remove the CD servo board and video board. Remove the traverse mechanism assembly

1.

From the back side of the traverse mechanism assembly, disconnect the spindle motor wires and feed motor wires that are soldered on the traverse mechanism board.

2.

Remove the two screws J attaching the traverse mechanism board.

Removing the feed motor (See Fig. 9.)

Remove the CD servo board and video board. Remove the traverse mechanism assembly.

1.

From the back side of the traverse mechanism assembly, disconnect the feed motor wires that are soldered on the traverse mechanism board.

K

J

Black

Feed motor

Rack

Fig.8

Traverse mechanism assembly

Spindle motor

Red

Traverse mechanism board

Red

J

Fig.9

2.

Remove the two screws K attaching the feed motor.

1-13

VS-DT88V

Removing the CD switch board

(See Fig.10.)

Remove the CD&Video CD mechanism assembly.

1.

From the top side of the CD&Video CD mechanism assembly, remove the screw L attaching the CD switch board.

2.

Lift the CD switch board slightly and then remove the wire from connector CN101 on the CD switch board.

Removing the loading motor assembly

(See Figs.10 to 13.)

Remove the CD&Video CD mechanism assembly.

1.

From the back side of the CD&Video CD mechanism assembly, disconnect the card wire from connector CN612 on the CD servo board. (See Fig.11.)

2.

Remove the screw N attaching the roller holder assembly. (See Fig.11.)

3.

From the top side of the CD&Video CD mechanism assembly, remove the two screws M attaching the clamper base assembly. (See Fig.10.)

CD&Video CD mechanism assembly

L

CN101

M

CD switch board

Fig.10

Card wire

CN612

Clamper base assembly

M

N

4.

Disconnect the wire from connector CN101 on the CD switch board while lifting the clamper base assembly slightly and remove the clamper base assembly. (See Fig.10.)

5.

Remove the three screws P attaching the roller holder assembly and take out the roller holder assembly. (See Fig.12.)

6.

Disconnect the wires from connectors CN103 and CN104 on the loading motor assembly.

(See Fig.13.)

7.

Remove the belt of the loading motor assembly.

(See Fig.13.)

8.

Remove the two screws Q attaching the loading motor assembly and take out the loading motor assembly. (See Fig.13.)

CD servo board

P

CN103

Fig.11

P

Roller holder assembly

Fig.12

CN104

Loading motor assembly

1-14

Q

Belt

Fig.13

Flow of functional operation until TOC read

Power ON Play Key

Slider turns REST SW ON.

Automatic tuning of TE offset

Laser ON

Detection of disc

Automatic tuning of Focus offset

VS-DT88V

Check Point

Confirm that the voltage at the pin4 of CN611 is "H"\"L"\"H".

Tracking error waveform at TOC reading

Pin 20 of IC601(TEOUT)

Approx

1.8V

VREF

Disc states to rotate

Approx.3sec

Tracking servo off states

Automatic measurement of TE amplitude and automatic tuning of TE balance

Tracking servo on states

Disc to be braked to stop

TOC reading finishes

500mv/div 2ms/div

Fig.1

Automatic measurement of Focus S-curve amplitude

Disc is rotated

Focus servo ON

(Tracking servo ON)

Automatic measurement of Tracking error amplitude

Automatic tuning of Tracking error balance

Automatic tuning of Focus error balance

Confirm that the Focus error S-curve signal at the pin 28 of IC651 is approx.2Vp-p

Confirm that the signal from pin 24 IC651(R808) is 0V as a accelerated pulse during approx.400ms.

Confirm the waveform of the Tracking error signal at the pin 20 of IC601 (R604) (See Fig.1.)

Automatic tuning of Focus error gain

Automatic tuning of Tracking error gain

TOC reading

Play a disc

Confirm the eys-pattern at the lead of ARF.

1-15

VS-DT88V

Maintenance of laser pickup

(1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.

(2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

The level of RF output (EFM output : ampli tude of eye pattern) will below.

Is the level of

RFOUT under

1.25V 0.22Vp-p?

YES

O.K

NO

Replace it.

Replacement of laser pickup

Turn off the power switch and, disconnect the power cord from the ac outlet.

Replace the pickup with a normal one.(Refer to "Removing the pickup unit" on the previous page)

Plug the power cord in, and turn the power on. At this time, check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at ARF.

Finish.

(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power. Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged due to excessive current.

1-16

Description of major ICs

MN101C35DKB (IC811) : FL driver microcomputer

1. Terminal layout

100 76

1

75

VS-DT88V

25

26 50

2. Pin function

51

Pin No. Symbol I/O Function

1 2 3 4 5

6,7

8 9

10

11,12

13

14~23

24 25 26

27~30

31 32

33~38

39,40

41 42 43

44~46

47

48~60

61 62~64 65~99

100

NC FLDATA FLCLK NC FLCS NC B5V OSC2 OSC1 GND NC GND VREF+ NC FLRST NCV70 REMCON_HO NCV70 GND NCV70 KEYLEDH KEYLEDV KEYDIMMER NC G1 G2~G14 G15

S1~S35

-VPP

-

Not connect

I/O

FL driver communication data input/output

I

FL driver communication clock input

-

Not connect

I

FL driver communication chip select input

-

Not connect

-

VDD(B5V)

O

8MHz main clock output

I

8MHz main clock input

-

Ground

-

Not connect

-

Ground

-

Reference voltage

-

Not connect

I

FL reset input

-

Not connect

O

Switching signal for receiver part of remote controller

-

Not connect

-

Ground

-

Not connect

-

Horizontal KEY LED control

-

Vertical KEY LED control

-

KEY LED DIMMER control

-

Not connect

-

Not connect

O

Grid signal outputs

-

Not connect

-

Not connect

O

Segment signal outputs

-

VPP

BA15218F (IC102,IC401) : Dual operational amplifier

1. Terminal layout & Block diagram

OUT1

IN1-

IN1+

VEE

1

2

1

3

4

8

Vcc

7

OUT2

6

IN2-

2

5

IN2+

1-17

VS-DT88V

MN101C30AEN (IC701) : System control microcomputer

1. Terminal layout

64 49

1

48

16

17 32

2. Pin function

33

Pin No. Symbol I/O Function

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

THERM KEY1 KEY2 VERSION GND VREF+ VDD OSC2 OSC1 VSS XI XO GND CDTX CDRX FLRST FLCOM FLDATA FLCLK STBLEDH RST STBLEDV FTU TUDATA TUST TUCK MPX

REM GND SMUTE AHB VOLDI VOLCE VOLCL LOMUTE TREMCONT

H-V

I

Temperature detection, ON/OFF control of FAN_SW signal (pin 57)

I

Key switch input of the main body

I

Key switch input of the main body

I

Switching signal for destination

-

Ground

-

Reference voltage for A/D converter

-

Power supply for microcomputer

O

8MHz main clock output

I

8MHz main clock input

-

Ground for microcomputer

I

32.768kHz sub clock input

O

32.768kHz sub clock output

-

Ground

O

CD(FMU-F2) communication

I

CD(FMU-F2) communication

O

FL reset output

I/O

FL driver communication data input/output

O

FL driver communication chip select output

O

FL driver communication clock output

O

Standby LED for horizontal establishment (POWER_OFF/ON=H)

I

Microcomputer reset input

O

Standby LED for vertical establishment (POWER_OFF/ON=H)

O

Power supply for tuner

I/O

PLL input/output data (Connect to tuner.)

O

PLL strobe output (Connect to tuner.)

O

PLL clock output (Connect to tuner.)

I

Stereo detection (Connect to tuner.), STEREO=L

-

Not connect

-

Not connect

I

Remote controller input

-

Ground

O

Mute signal, MUTE=L

O

Bass boost, ON=L, POWER_OFF=L

O

Data output (Connect to VOLUME_IC.)

O

Enable output (Connect to VOLUME_IC.)

O

Clock output (Connect to VOLUME_IC.)

O

Line out mute signal, MUTE=L

I

Remote controller effective signal for horizontal establishment, L : effective state

-

Connect to ground

I

Detecting signal for horizontal or vertical establishment

1-18

VS-DT88V

Pin No. Symbol I/O

41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 50 60 61 62 63 64

CDRST

BLCTL PSAVE FCD POUT TOPLED1 TOPLED2 STBDIM DOOR1 DOOR2 +BCTL BUP FANSW MT0 MT1 MTS VREFLOCK SAFETYCD SAFETY

-

O

-

O O O O O

O

O O O O

-

Function Connect to ground Connect to ground Connect to ground CD reset output (Connect to FMU-F2.) Connect to ground Not connect Power save mode ON/OFF signal, SAVE=H CD power supply ON/OFF Main power supply ON/OFF LED color control (Software PWN output) LED color control (Software PWN output)

I

Dimmer control for STBYLED_H/V

I

Moving panel position detecting signal, CLOSE=L

I

Moving panel position detecting signal, OPEN=L Unnecessary power supply cut-off signal for outage, Outage=H

I

Outage detecting signal (Backup mode) Fan motor ON/OFF signal Panel open (Motor driver) Panel close (Motor driver) Panel action speed Reference voltage for A/D converter (Connect to ground.)

I

Detection signal for panel action load

I

Detecting signal for CD abnormal voltage

I

Detecting signal for abnormal voltage

KIA78S06P (IC702) : Regulator

1. Terminal layout 3. Block diagram

123

2. Pin function

Pin No.

1 2 3

Output GND Input

Function

Z1

Q14

Q16

Q1

R9

R10

R11

Q2

Q7

UPC78L05J (IC191) : Three terminal voltage regulator

1. Terminal layout

1 : OUTPUT 2 : GND 3 : INPUT

123

2. Circuit diagram

R13

Q10

R14

R15

D1

Q15

R16

Q11

R17

Q5

Q4

R1

Q1

Q4

R1

Q8

Q3

R4

R2

Q6

R2

R3

Q2

Q8

R5

C1

R3

Q9

Q3

C1

R9

R6

Q13

Q5

R4

Q9

Q7

Q10

D2

R19

R18

R11

Q12

Q11

Q12

R12

R7

R8

Q14

R10

Q13

R7

R5

R6

INPUT

OUTPUT

GND

3

INPUT

OUTPUT

1

2

GND

1-19

VS-DT88V

MN101C30AKK (IC251) : Unit microcomputer

1. Terminal layout

64 49

1

48

16

17 32

2. Pin function

33

Pin No. Symbol I/O Function

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 - 48

49 50 51 52 53 54

/SW1 /SW2(P.UP) /SW3(P.UP)

PCHKCD

PCHKVCD

VREF+

VDD OSC2 OSC1

VSS

XI

XO

MMOD

M S TAT

KCMD

NC SUBQ SQCK

/VCDRST

/CDMRST

NC(O)

UDSASTB UDSADAT

UDSAACK

NC

BLKCK

NC

FLAG

NC

DSASTB DSADAT

DSAACK

NC

REST(P.UP)

/DRMUTE

FWD

REV

/PONCD

NC

I

Mechanism SW1 input

I

Mechanism SW2 input

I

Mechanism SW3 input

I

Detection of /PONCD status

I

Detection of /PONMP3 status

-

Reference voltage (Connect to power supply)

-

Power supply

O

X'tal OSC output terminal

I

X'tal OSC input terminal

-

Ground

-

Connect to ground

-

Not use

I

Connect to ground

O

Mechanism status output

I

Command signal input

-

Not use (Connect to ground)

I

Sub-code Q data input

O

Clock input for sub Q reg.

O

VCD reset signal

I

Micom reset

O

Not use (CD LSI supply enable)

I/O

VCD companion chip STB

I/O

VCD companion chip DAT

I/O

VCD companion chip ACK

-

Not use (Connect to ground)

I

Sub-code block clock signal

-

Not use (Connect to ground)

I

Outside clock for sub-code Q register input

-

Not use (Connect to ground)

-

Not use (Connect to ground)

I/O

VCD processor STB

I/O

VCD processor DAT

I/O

VCD processor ACK

-

Not use (Connect to ground)

I

Reset switch input

O

Mute for drive IC

O

Loading (EJECT) output

O

Loading (LOAD) output

O

CD LSI supply enable

-

Not use (Connect to ground)

1-20

VS-DT88V

Pin No.

55 56 57 58 59 60 61 62 63 64

Symbol I/O Function /PONVCD /LSIRST S TAT M DATA MCLK MLD VREF/TLOCK /FLOCK SENSE

O

MP3 LSI supply enable

O

CD LSI reset

I

Status input from CD LSI

I/O

CD LSI MDATA (Serial data)

O

CD LSI MCLK (Serial clock)

O

Command load signal O/P

-

Reference voltage (Connect to ground)

I

Tracking servo lock

I

Focus servo lock

I

Sense signal input

LA4905 (IC301) : 2ch BTL power amplifier

1. Terminal layout 2. Block diagram

CVL

C

SWB VL VL

8

9 15 14 12 13 16 7 5 6 18 19 17 22

SW

123

VH

11

10

drive

D

H.L.S.

Switching regulator block

Standby

SW

ST-BY RF PREGND IN 1 IN 2 ON-TIMEBEEP

C B A

Ripple

filter

SW

GND

Amplifier output stage

H.L.S. : Higher Level signal selector

+OUT1 +OUT2 NC-OUT1 -OUT 2PG1 PG2

AB D

Nonlinear/output stage

CH 1

Input amplifier

BEEP amplifier

C

Power supply/ground

shorting protection circuit

Overvoltage/thermal

protection circuit

CH 2

Input amplifier

Nonlinear amplifier/output

stage

Pop noise

prevention

circuit

ON MUTE

muting circuit

2314322021

NJM4580D-D (IC101) : Dual operational amplifier

1. Terminal layout & Block diagram

8 7 6 5

B

A

1 2 3 4

1. OUT1

2. IN1-

3. IN1+

4. VEE

5. IN2+

6. IN2-

7. OUT2

8. VCC

1-21

VS-DT88V

ES3880FL (IC101) : VCD processor

1. Terminal layout

80 ~ 51

100 ~ 81

1 ~ 30

2. Block diagram

Processor Interface

/LCS3, /LCS[1:0]

31 ~ 50

Serial Audio Interface

SEL_PLL[1:0]

TDM Interface

LA[17:0]

LD[7:0]

/LWR

/LOE

ACLK

ATCLK

AIN AOUT ARFS

ATFS

ARCLK

TDMCLK

TDMDR

TDMFS

RISC

Processor

Serial Audio

Interface

TDM

Interface

3. Pin function Pin No. Symbol I/O Function

1 2 3

4 - 12

13 - 28

29 30 31

32 - 39

40 41 42

VDD3

/RAS

/DWE

MA0 - 8

DBUS0 - 15

/RESET

GND

VDD3

YUV0 - 7

VSYNC

HSYNC

CPUCLK

3.3V power supply

Row address strobe

O

DRAM write enable

O

DRAM multiplexed row and column address bus

O

DRAM data bus

I/O

System reset

I

Ground

-

3.3V power supply

YUV[7:0] 8-bit video data bus

O

Vertical sync

I/O

Horizontal sync

I/O

RISC and system clock input.

I

CPUCLK is used only if SEL_PLL[1:0] = 00 to bypass PLL.

43 44

45 - 49

50 51 52 53 54

55 - 62

63 64 65 66 67

68 - 79

80 81

82 - 87

88

PCLK2X

PCLK

AUX0 - 4

GND VDD3 AUX6 AUX5 AUX7

LD0 - 7

/LWR

/LOE

/LCS3 /LCS1 /LCS0

LA0 - 11

GND

VCC

LA12 - 17

ACLK

Doubled 54MHz pixel clock

I/O

27MHz pixel clock

I/O

Auxiliary control pins 4:0, AUX0 and AUX1 are open collectors.

I/O

Ground

-

3.3V power supply

Auxiliary control pins 6

I/O

Auxiliary control pins 5

I/O

Auxiliary control pins 7

I/O

RISC interface data bus

I/O

RISC interface write enable (Not connect)

O

RISC interface output enable

O

RISC interface chip select

O

RISC interface chip select

O

RISC interface chip select

O

RISC interface address bus

O

Ground

-

5.0V power supply

RISC interface address bus

O

Master clock for external audio DAC

I/O

Huffman Decoder

64x32 ROM

32x32 SRAM

Registers

DRAM DMA

Controller

DRAM Interface

2Kx32 ROM

512x32 SRAM

MPEG

Processor

Video Output

On Screen

Display

/RAS MA[9:0] DBUS[15:0] /DOE /DWE /CAS

AUX[7:0]

YUV[7:0] PCLK2X PCLK VSYNC HSYNC

CPUCLK /RESET

DRAM

AUX

Screen Display

Misc.

1-22

Pin No. Symbol I/O Function

89

AOUT

SELPLL0

Audio interface serial data output when selected.

O

System and DSCK output clock frequency selection at reset time. The matrix below

I

lists the available clock frequencies and their respective PLL bit settings. SELPLL1 SELPLL0 DCLK 0 0 Bypass PLL (input mode) 0 1 54MHz (output mode) Default 1 0 67.5MHz (output mode) 1 1 81.0MHz (output mode)

VS-DT88V

90 91

92

93 94 95 96 97 98 99

100

ATCLK

ATFS

SELPLL1

DA9

/DOE

AIN

ARCLK

ARFS

TDMCLK

TDMDR TDMFS

/CAS

GND

Audio transmit bit clock

I/O

Audio transmit frame sync

O

Refer to the description and matrix for SEL_PLL0 pin 89.

I

DRAM multiplexed row and column address line 9

O

DRAM output enable

O

Audio serial data input

I

Audio receive bit clock

I

Audio receive frame sync

I

TDM serial clock

I

TDM serial data receive

I

TDM frame sync

I

DRAM column address strobe

O

Ground

-

TC7S08F (IC106) : 2-inputs AND gate

1. Terminal layout

1

IN B 54Vcc

IN A

2

GND

3

OUT Y

2. Truth table INPUTS OUTPUT

A

B

L

H

L

H

Y

L L L

H

TC7W08FU (IC107) : Dual 2-inputs AND gate

1. Terminal layout

11A

1B

2

2Y

3

GND 4

8 Vcc

1Y

7

2B

6

2A5

2. Truth table INPUTS OUTPUT

A L L H H

B

L

H

L

H

Y

L L L

H

1-23

VS-DT88V

ES3883F (IC104) : VCD companion chip

1. Terminal layout

80 ~ 51

100 ~ 81

1 ~ 30

31 ~ 50

2. Pin function Pin No. Symbol I/O Function

1,2

3

4,5

6 7 8

9 10 11 12

GND

NC

VCC

DSCC

AUX00

DSCD0

AUX01

DSCS

AUX02

DCLK

EXTCLK

Ground

No connect

Voltage supply, 5V

Clock for programming to access internal registers

I

Servo forward or general-purpose I/O (Not connect)

I/O

Data for programming to access internal registers

I/O

Servo reverse or general-purpose I/O (Not connect)

I/O

Strobe for programming to access internal registers

I

Servo LDON or general-purpose I/O (Not connect)

I/O

DCLK is the MPEG decoder clock.

O

EXT_CLK is the external clock.

I

EXT_CLK is an input during bypass PLL mode.

13 14 15 16 17 18 19

20 21 22 23

/RST

AUX07/NFD_DI

MUTE

VCC

MCLK

AUX08/NFD_CLK

TWS

SPLLOUT

AUX09/SQSO

TSD

TBCK

RWS

SPLL1

Video reset (active-low)

I

Servo BRKM/sense or general-purpose I/O / VFD_DI (Not connect)

I/O

Audio mute (Not connect)

O

Voltage supply, 5V

Audio master clock

I

Servo mute/open or general-purpose I/O / VFD_CLK (Not connect)

I/O

TWS is the transmit audio frame sync.

I

SPLL_OUT is the select PLL output.

O

Servo SQSO or general-purpose I/O (Not connect)

I/O

Transmit audio data input

I

Transmit audio bit clock

I

RWS is the receive audio frame sync.

O

SPLL[1:0] select the PLL clock frequency for the DCLK output.

I

SPLL1 SPLL0 DCLK 0 0 Bypass PLL (input mode) 0 1 27MHz (output mode) 1 0 32.4MHz (output mode) 1 1 40.5MHz (output mode)

1-24

24 25,26 27,28

29 - 31

32

33

34

/RSTOUT

GND

NC

GND

VCC RSD

SPLL0

AUX10/SQCK

Reset output (active-low)

O

Ground

No connect

Ground

Voltage supply, 5V

RSD is the receive audio data input.

O

SPLL0 and SPLL1 select the PLL clock frequency for the DCLK

I

output. Refer to the table in the definition for pin 23. Servo SQCK or general-purpose I/O (Not connect)

I/O

Pin No. Symbol I/O Function

35 36 37

38 39 40 41 42

43

44 45,46 47,48

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

AUX11/IRQ

AUX12/C2PO

RBCK

SERIN

AUX13/SP

AUX14/SOSI

AUX15/IR

AGND

VREFM

VREFP

AVDD

AOR+,AOR-

AOL-,AOL+

MIC1

MIC2 AGND VREF

VCM

RSET

COMP

VGND CDAC

VVID YDAC VGND VDAC

PLLCAP

VDD

AUX06/VFD_DO

AUX05 AUX04 AUX03

XOUT

GND VDD

XIN

GND

NC GND VCC

PCK

PCK2

DSCD7

/HSYNC

ES3880 IRQ or interrupt output or general-purpose I/O (Not connect)

I/O

CD C2PO or interrupt input or general-purpose I/O (Not connect)

I/O

RBCK is the receive audio bit clock.

O

SER_IN is the serial input DSC mode:

I

0 = Parallel DSC mode 1 = Serial DSC mode Serial interrupt/CD-mute or general-purpose I/O (Not connect)

I/O

Servo SCOR (SOSI), interrupt input, or general-purpose I/O (Not connect)

I/O

Interrupt input or general-purpose I/O (Not connect)

I/O

Audio analog ground

ADC common mode reference (CMR) buffer output. CMR is approximately

I

2.25V. Bypass to analog ground with 47uF electrolytic in parallel with 0.1uF. DAC and ADC maximum reference. Bypass to video CMR (VCMR) with 10uF

I

in parallel with 0.1uF. Analog VCC, 5V

I

Right channel output

O

Left channel output

O

Microphone input 1

I

Microphone input 2 (Not connect)

I

Audio analog ground

Internal resister divider generates CMR voltage.

I

Bypass to analog ground with 0.1uF. DAC and ADC minimum reference.

I

Bypass to VCMR with 10uF in parallel with 0.1uF. Full-scale DAC current adjustment

I

Compensation pin

I

Video analog ground

Modulated chrominance output

O

Video VCC, 5V

Y luminance data bus for screen video port

O

Video analog ground

Composite video output

O

Audio CAP

I

Voltage supply, 5V

Servo XLAT or general-purpose I/O / VFD_DO (Not connect)

I/O

Servo data or general-purpose I/O (Not connect)

I/O

Servo CCW/close or general-purpose I/O (Not connect)

I/O

Servo CW/limit or general-purpose I/O (Not connect)

I/O

Crystal output

O

Ground

Voltage supply, 5V

27MHz crystal input

I

Ground

No connect

Ground

Voltage supply, 5V

-

13.5MHz pixel clock

I/O

27MHz(2 times pixel clock)

I/O

Data for programming to access internal registers

I/O

Horizontal sync (active-low)

O

VS-DT88V

1-25

VS-DT88V

Pin No. Symbol I/O Function

83 84 85

86~89

90 91 92 93 94 95 96 97 98 99

100

DSCD6

/VSYNC

DSCD5

YUV7~4

VCC GND

YUV3

DSCD4

YUV2

DSCD3

YUV1

DSCD2

YUV0

DSCD1

GND

Data for programming to access internal registers

I/O

Vertical sync (active-low)

O

Data for programming to access internal registers

I/O

YUV data bus for screen video port

I

Voltage supply, 5V

Ground

YUV data bus for screen video port

I

Data for programming to access internal registers

I/O

YUV data bus for screen video port

I

Data for programming to access internal registers

I/O

YUV data bus for screen video port

I

Data for programming to access internal registers

I/O

YUV data bus for screen video port

I

Data for programming to access internal registers

I/O

Ground

-

AT27C020-70JCU2 (IC102) : 2M-bit OTP EPROM

1. Terminal layout

LA12

LA15

LA16

VPP

VCC

/PGM

LA17

432

1

LD2

GND

LD3

323130

LD4

LD5

29 28 27 26 25 24 23 22 21

LD6

LA14 LA13 LA8 LA9 LA11 /LOE LA10 /LROMCE LD7

LA7 LA6 LA5 LA4 LA3 LA2 LA1 LA0

LD0

5 6 7 8 9 10 11 12 13

14151617181920

LD1

3. Pin function Pin No. Symbol I/O Function

1

VPP

2 - 12

13 - 15

17 - 21

25 - 30

LA16, LA15, LA12, LA7 - LA0 LD0 - LD2

16

GND LD3 - LD7

22

/LROMCE

23

LA10

24

/LOE LA11, LA9, LA8, LA13, LA14, LA17

31

/PGM

32

VCC

2. Block diagram

VCC

GND

VPP

/LOE

/LROMCE

/PGM

LA0 - LA17

ADDRESS

INPUTS

I

O

-

O

I I I I I

-

PROGRAM LOGIC

Power supply terminal Address inputs Data outputs Ground terminal Data outputs Chip enable terminal Address input Output enable terminal Address inputs Program strobe Power supply terminal

/LOE, /LROMCE

AND

Y DECODER

X DECODER

DATA OUTPUTS

LD0 - LD7

OUTPUT

BUFFERS

Y-GATING

CELL MATRIX

IDENTIFICATION

1-26

AN22000A (IC601) : RF & Servo amplifier

1. Terminal layout 2. Block diagram

3TOUT

CEA

9 10 15 22 23 21 20 19 18 2 1

14

OFTR 3TENV

13

12

BDO

11

8

AGC

7

6

5

4

NRFDET

RF_EQ

10 11 12 13 14 15 16

1 2 3 4 5 6 7 8 9

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

OFTR

COFTR

BDO

CBDO

ARF

CAGC

RF IN

RF OUT

RFN

FEN

FEOUT/RFDET

SUBT SUBT

BCA

GCA

TEN

BCA

GCA

BCA

GCA

AMPAMPAMP

VS-DT88V

VDET

TEBPFTEOUT

VDET

BCA

GCA

AMP

PDLD

3

VCC

16

GND

FBAL

25

26

TBAL

GCTRL

24

3. Pin function

A C B D PDE PDF VREF

Pin No. Symbol Function

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

PD LD VCC RFN RF OUT RF IN CAGC ARF CEA 3TOUT CBDO BDO COFTR OFTR /RFDET GND VREF VDET TEBPF TEOUT TEN FEN FEOUT GCTRL FBAL TBAL PDE PDF D B C A

APC Amp. Input terminal APC Amp.Output terminal Power supply terminal RF addition Amp.Reversing input terminal RF addition Amp.Output terminal AGC input terminal Terminal of connection of capacity of AGC loop filter. AGC output terminal Capacity connection terminal for HPF-Amp. 3TENV output terminal Capacity connection terminal for RF shade side envelope detection BDO output terminal Capacity connection terminal for RF discernment side envelope detection OFTR output terminal RFDET output terminal (Negative logic) Earth terminal VREF output terminal VDET output terminal VDET input terminal TE Amp. output terminal TE Amp. reversing input terminal FE Amp. reversing input terminal FE Amp. output terminal Terminal GCTL & APC FBAL control terminal TBAL control terminal Tracking signal input terminal 1 Tracking signal input terminal 2 Focus signal input terminal 4 Focus signal input terminal 2 Focus signal input terminal 3 Focus signal input terminal 1

2729303132

28

17

1-27

VS-DT88V

MN6627482WA (IC651) : Digital servo & Digital signal processor

1. Terminal layout

21

20 1

80

40

41 60

2. Pin function

61

Pin No. Symbol I/O Function

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

BCLK LRCK SRDATA DVDD1 DVSS1 TX MCLK MDATA MLD SENSE /FLOCK /TLOCK BLKCK SQCK SUBQ /DMUTE STAT DSP_RST SMCK PMCK TRV TVD PC ECM ECS KICK TRD FOD VREF FBAL TBAL FE TE RFENV VDET OFT TRCRS /RFDET BDO LDON

O

Bit clock output for SRDATA

O

LR signal separation output

O

Serial data output

-

Power supply for digital circuit

-

GND for digital circuit

O

Digital audio interface output

I

Micro computer command clock signal input

I

Micro computer command data input

I

Micro computer command load signal input (L:Load)

O

Sense signal output

O

Focus lock signal output (L:Focus lock)

O

Tracking lock signal output (L:Tracking lock)

O

Sub code block signal output

I

External clock input for sub code Q register input

O

Sub code Q data output

I

Muting input (H:Mute)

O

Status signal input

I

Reset signal input (L:Reset)

-

Not use

-

Not use

O

Traverse enforced output

O

Traverse drive output

-

Not use

O

Spindle motor drive signal (Enforced mode output)

O

Spindle motor drive signal (Servo error signal output)

O

Kick pulse output

O

Tracking drive output

O

Focus drive output

I

Reference voltage for D/A output block

O

Focus balance adjust signal output

O

Tracking balance adjust signal output

I

Focus error signal input (Analog input)

I

Tracking error signal input (Analog input)

I

RF envelope signal input (analog input)

I

Connect to GND

I

Off track signal input (H:Off track)

I

Track cross signal input

I

RF detect signal input (L:Detect)

I

Drop out signal input (H:Drop out)

O

Laser ON signal output (H:ON)

1-28

Pin No. Symbol I/O Function

41 42 43 44 45 46 47 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

PLLF2 TOFS WVEL ARF IREF DRF DSLF PLLF VCOF AVDD2 AVSS2 XCLK DSLB VCOF2 SUBC SBCK VSS X1 X2 VDD BYTCK GIO1 GIO2 IPFLAG FLAG CLVS CRC DEMPH RESY IOSEL /TEST AVDD1 OUTL AVSS1 OUTR RSEL CSEL PSEL MSEL SSEL

-

Not use

-

Not use

-

Not use

I

RF signal input

I

Reference current input

I

Bias pin for DSL (Not connect)

I/O

Loop filter pin for DSL

I/O

Loop filter pin for PLL

I/O

Loop filter pin for VCO

-

Power supply for analog circuit

-

GND for analog circuit

-

Not use

O

DSL balance output

I/O

Loop filter pin for digital servo VCO

-

Not use

-

Not use (Connect to ground)

-

GND for crystal oscillation circuit

I

Input for crystal oscillation circuit (f=16.9344MHz)

O

Output for crystal oscillation circuit (f=16.9344MHz)

-

Power supply for crystal oscillation circuit

-

Not use

O

Laser ON signal output (H : ON)

O

Gain control output (H : CD-RW) (Not connect)

-

Not use

O

Flag signal output

-

Not use

-

Not use

-

Not use

-

Not use

I

Mode select pin, connect to ground

I

Test pin, connect to DVDD1 (H fix)

-

Power supply for analog circuit

O

L-channel audio output (Not connect)

-

GND for analog circuit

O

R-channel audio output (Not connect)

-

Not use, connect to DVDD1 (H fix)

-

Connect to ground

I

IOSEL=H , Test pin, not connect

I

IOSEL=H , SMCK output , Frequency select pin, not connect

I

IOSEL=H , SMCK output , SUBQ output mode select pin, not connect

VS-DT88V

LB1641 (IC108) : DC motor driver

1. Terminal layout

1

2 3 4 5 6 7 8 9 10

P1

VZ

IN1

GND

OUT1

IN2

VCC1

VCC2P2OUT2

2. Pin function Input Output

IN1

0 1 0 1

IN2

0 0 1 1

OUT1

0 1 0 0

OUT2

0 0 1 0

Mode

Brake Clockwise Counterclockwise Brake

1-29

VS-DT88V

GLT44016-35J4 (IC103) : 4M-bit DRAM

1. Terminal layout

2. Pin function

VCC

D0 D1 D2 D3

NC

D4 D5 D6

D7 NC NC

WE

RAS

NC

A0

A1

A2

A3

VCC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

40

GND

39

D15

38

D14

37

D13

36

D12

35

NC

34

D11

33

D10

32

D9

31

D8

30

NC

29

CASL

28

CASH

27

OE

26

A8

25

A7

24

A6

23

A5

22

A4

21

GND

Pin No. Symbol I/O Function

Power supply terminal

1

2 - 5

6 7 - 10 11,12

13 14 15

16 -19

20 21

22 - 26

27 28 29 30

31 - 34

35

36 - 39

40

VCC D0 - D3 NC D4 - D7 NC WE RAS NC A0 - A3 VCC GND A4 - A8 OE CASH CASL NC D8 - D11 NC D12 - D15 GND

Data inputs/outputs

I/O

Not used

Data inputs/outputs

I/O

Not used

Write enable terminal

I

Row address strobe terminal

I

Not used

Address inputs

I

Power supply terminal

Ground terminal

Address inputs

I

Output enable terminal

I

Upper column address strobe terminal

I

Lower column address strobe terminal

I

Not used

Data inputs/outputs

I/O

Not used

Data inputs/outputs

I/O

Ground terminal

-

GP1FA550TZ (J3601) : Fiber optic transmitter/Receiver

1. Terminal layout 2. Block diagram

LED

Drive

IC

VIN VCC GND

RPM6938-V4 (IC801,IC812) : Remote control receiver

1. Block diagram

3

1

2

VDD

OUT

GND

I/V conversion

PD

magnetic shield

AMP

BPF

for trimming circuit

AGC

Detector

Vcc

Comp

22k ohm

1-30

LA1838 (IC1) : FM AM IF amplifier & Detector, FM MPX decoder

1. Terminal layout & Block diagram

VS-DT88V

30

ALC

BUFF

FM

S-METER

FM IF

1

29

AM

OSC

S-CLRVE

PM

DET

2

REG

SD

COMP

27

28

AM

MIXFMRF.AMP

AM IF DET

AM/FM

IF-BUFF

4

3

26

AGC

AM

S-METER

GND

25

24

TUNING

DRIVE

5

STEREO

DRIVE

6

7

22

23

VCC

89

P-DET

384KHz

21

DECODER

ANIT-BIRDIE

VCO

10

2. Pin function Pin No. Symbol I/O Function

This is an input terminal of FM IF signal.

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

FM IN AM MIX FM IF AM IF GND TUNED STEREO VCC FM DET AM SD FM VSM AM VSM MUTE/IFOUT

FM/AM MONO/ST LOUT ROUT LIN RIN RO LO MPX IN FM OUT AM DET AM AGC AFC AM RF REG AM OSC OSC BUFFER

I

This is an out put terminal for AM mixer.

O

Bypass of FM IF

I

Input of AM IF Signal.

I

This is the device ground terminal.

When the set is tuning, this terminal becomes "L".

O

Stereo indicator output. Stereo "L", Mono: "H"

O

This is the power supply terminal.

FM detect transformer.

This is a terminal of AM ceramic filter.

Adjust FM SD sensitivity.

O

Adjust AM SD sensitivity.

O

When the signal of IF REQ of IC2(LC72136N) appear, the signal of FM/AM IF output.

I/O

Muting control input. Change over the FM/AM input. "H" :FM, "L" : AM

I

Stereo : "H", Mono: "L"

O

Left channel signal output.

O

Right channel signal output.

O

Input terminal of the Left channel post AMP.

I

Input terminal of the Right channel post AMP.

I

Mpx Right channel signal output.

O

Mpx Left channel signal output.

O

Mpx input terminal

I

FM detection output.

O

AM detection output.

O

This is an AGC voltage input terminal for AM.

I

This is an output terminal of voltage for FM-AFC.

AM RF signal input.

I

Register value between pin 26 and pin28 besides the frequency width of the input signal.

O

This is a terminal of AM Local oscillation circuit.

AM Local oscillation Signal output.

O

20

STEREO

5N SW

FF

38k

11

19

MUTE

FF 19k

/

2

12 13

18

FF 19k

17 16

/LS

14

PILOT

DET

15

1-31

VS-DT88V

LC72136N (IC2) : PLL frequency synthesizer

1. Terminal layout

2. Block diagram

FM

CE

DI

CK

DO

LW (MW) SDIN

1 2 3 4 5 6 7 8 9 10 11

22 21 20 19 18 17 16 15 14 13 12

XIN VSS LPFout LPFin PD VDD FMOSC AMOSC

IF REQ FM/AMIF

16

15

17

22

21

1

1/2

3

4 5 6

C2B

I/F

Power

on

Reset

Reference

Swallow Counter

1/16,1/17 4bit

Programmable

Data Shift Register & Latch

721113

XOUT

ST/MONO

AM/FM

3. Pin function Pin No. Symbol I/O Function

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18

XOUT FM CE DI CK DO ST/MONO AM/FM LW (MW) SDIN FM/AM IF IF REQ

AMOSC FMOSC VDD PD

I

X'tal oscillator connect (75kHz)

O

LOW:FM mode

I

Chip enable, When data output/input for 4pin(input) and 6pin(output): H

I

Input for receive the serial data from controller

I

Sync signal input use

O

Data output for Controller, Output port

O

Stereo:"H", Mono:"L"

O

Open state after the power on reset

I/O

Input/output port (Not use)

I/O

Input/output port (Not use)

I/O

Data input/output

I

IF counter signal input

O

IF signal output

-

Not use

I

AM Local OSC signal output

I

FM Local OSC signal input

-

Power supply(VDD=4.5-5.5V), When power ON:Reset circuit move

O

PLL charge pump output(H: Local OSC frequency Height than Reference

frequency. L: Low Agreement: Height impedance) 19 20 21 22

LPFin LPFout VSS XIN

I

Input for active low pass filter of PLL

O

Output for active low pass filter of PLL

-

Connected to GND

I

X'tal oscillator connect (75KHz)

Driver

12bit

Drivers

8

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

18 19 20

12

1-32

LA6575H (IC801) : Focus & Spindle & Feed & Tracking & Loading BTL driver

1. Terminal layout 2. Block diagram

VS-DT88V

1 2 3 4 5 6 7

29

8

9 10 11 12 13 14

28 27 26 25 24 23 22

30

21 20 19 18 17 16 15

REV

FWD

28 27 26 25 24 23 22 30 21 20 19 18 17 16 15

Input

MUTE is as follows: High: Output ON Low : Output OFF

Thermal shutdown

Output control

CH5 CH4

CH5

POWER

1234567 29 8 9 1011121314

VO5-

VCC2

3. Pin function Pin No. Symbol Function

1 2 3 4 5 6 7 8

9 10 11 12 13 14

VCC2 VO5VO5+ VO4+ VO4VO3+ VO3VO2+ VO2VO1+ VO1VCC1 VIN1 VIN1G

Power supply for CH3/CH4/CH5 Loading output (-) Loading output (+) Tracking output (+) Tracking output (-) Focus output (+) Focus output (-) Spindle output (+) Spindle output (-) Traverse output (+) Traverse output (-) Power supply for CH1/CH2 Not use Traverse drive input

S-GND

MUTE

Level

shift

VO5+

VO4+

VIN4

22k 11k

VO4-

VIN4G

Signal

system

power

Level

shift

CH3

VO3+

VCC-S

VO3-

GNDGND

VREF-IN

REG-OUT

5VREG (External PNP_Tr)

Level

shift

CH2

VO2-

VO2+

Pin No. Symbol Function

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

VIN2 VIN2G VIN3 VIN3G REG-IN REG-OUT VREF-IN VCC-S VIN4G VIN4 MUTE S-GND FWD REV

Not use Spindle drive input Not use Focus drive input Connect to power supply Not use Reference voltage input terminal Signal system power Tracking drive input Not use Mute for CH1/CH2/CH3/CH4 Signal system ground Loading input (EJECT) Loading input (LOAD)

REG-IN

VIN3G

22k

Level

shift

CH1

VO1-

VO1+

11k

22k

11k

CH1- 4

POWER

VIN3

22k

VCC1

VIN2G

VIN2

11k

VIN1

VIN1G

1-33

VS-DT88V

LC75342M (IC501) : E. volume

1. Terminal layout

1

DATA

2

CE

3

VSS

4

TEST

5

ROUT

6

RBASS2

7

RBASS1

8

RTRE

9

RIN

10

RSELO

11

R4

12

R3

13

R2

14

R1

15

NC

3. Pin function

Pin No.

Symbol Function

1

DATA

2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

CE

VSS

TEST

ROUT RBASS2 RBASS1

RTRE

RIN

RSELO

R4 R3 R2

R1 NC NC

2. Block diagram

RSELO RIN RTRE RBASS1 RBASS2 ROUT

30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

CLOCK VDD VREF NC LOUT LBASS2 LBASS1 LTRE LIN LSELO L4 L3 L2 L1 NC

NC NC

11

R4

12

R3

13

R2

14

R1

15 16 17

L1

18

L2

19

L3

20

L4

10

Serial data and clock input for IC control Chip enable Connect to GND Electric volume connection for test Volume control and equalizer input Connection for resistor and capacitor that from the bass band filter Connection for capacitor that from the treble band filter Volume control and equalizer input Input selector output Input signal connections Input signal connections Input signal connections, not use Input signal connections Not use Not use

9 8 7 6 5

CONTROL

CIRCUIT

LOGIC

CIRCUIT

CONTROL

CIRCUIT

Pin No.

17 18 19 20 21 22 23

Symbol Function

L1 L2 L3 L4

LSELO

LIN

LTRE

LVref

CCB

INTERFACE

RVref

LOUTLBASS2LBASS1LTRELINLSELO

Input signal connections Input signal connections, not use Input signal connections Input signal connections Input selector output Volume control and equalizer input Connection for capacitor that from

the treble band filter 24 25 26 27 28

LBASS1 LBASS2

LOUT

VREF

Connection for resistor and capacitor

that from the bass band filter

Volume control and equalizer input

NC

Not use

Connection to the 0.5X VDD voltage

generator circuit used as the analog

signal ground 29 30

VDD

CLOCK

Power supply

Serial data and clock input for IC

control

4

TEST

3

VSS

2

CE

1

DATA

30

CLOCK

29

VDD

28

VREF

27

NC

262524232221

1-34

< MEMO >

VS-DT88V

1-35

VS-DT88V

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,maebashi-city,371-8543,Japan

No.21179

200209