JVC THA-75 Service manual

22009200302

TH-A75

SERVICE MANUAL

DVD DIGITAL CINEMA SYSTEM

TH-A75

SP-WA75

VCR/DBS

FM/AM

AUDIO

ANGLE

TOP MENU

DSP

SURROUND

CONTROL

VCR

123

S.WFR

456

SLEEP

789

SURR-L

SETTING

TV RETURN

ADJUST

SCREEN

ENTER

CHOICE

CHANNEL/ZOOM

TV/VIDEO MUTING

/REW

PLAY

TUNING

DOWN UP

O.T.

STOP

REPLAY

REC

MEMORY

DIMMER

RMÐSTHA75U

DVD CINEMA SYSTEM

TV AUDIO

DVD

SUBTITLE

RETURN DIGEST

OFF

CENTER

S-BACK

FM MODE

VOLUMETV VOL

DECODE

EFFECT

SURR-R

CATV/DBS

PROGRESSIVE

FF/

PAUSE

STROBE

VCR 1

VCR

SOUND

TEST

+ Ð

+10

100+

AUDIO/ TV/VCR

VFP

STANDBY

COMPACT

DIGITAL¥EX

SUPER VIDEO

PRO LOGIC

SP-XSA75

PROGRESSIVE

SP-XCA75

SOURCE

VOLUME

PHONES

XV-THA75

Area Suffix

US ---------------- Singapore UP --------------------- Korea UT -------------------- Taiwan UX ------------ Saudi Arabia

TABLE OF CONTENTS

1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

No.22009

2003/02

TH-A75

Important Safety Precautions

1.1 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 sho uld 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 manufacturers 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 v isual inspecti on nor can th e protection afforded by them necessarily be obtained by using replacement components rated for highe r voltage, w a tt age, 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 reassembling.

(5) Leakage shock hazard testing)

After reassembling the product, always perform an isolat ion 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, partic ularly 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 ohm 10W resistor paralleled by a 0.15 µF AC-type capacitor between an

SECTION 1

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 meta l part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

1.2 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.

1.3 Caution 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.

1.4 Critical parts for safety

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

1-2 (No.22009)

TH-A75

1.5 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.

1.5.1 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) 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) Ground yourself

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

(3) Handling the optical pickup

• 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.)

• Do not use a tester to check the condition of the laser diode in the optical pic kup. The tester's internal powe r source can easily destroy the laser diode.

1.6 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, re f e r t o the replace-

ment 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 ca ble carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.7 Attention when traverse unit is decomposed *Please refer to "Disassembly method" in the text for the DVD pickup unit.

• Apply solder to the short land sections before the flexible wire is disconnected from the connector CN101 on the DVD servo board. (If the flexible wire is disconnected without applying solder, the DVD pickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.

DVD servo board

Flexible wire

Short land sections

DVD mechanism assembly

CN101

(No.22009)1-3

TH-A75

1.8 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 laser

radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches.

(5) CAUTION : If safety switches malfunction, the laser is able

to function.

(6) CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in hazardous radiation exposure.

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

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.

REPRODUCTION AND POSITION OF LABELS

CLASS 1 LASER PRODUCT

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er ude af funktion. Undgå udsasttelse for stråling.

ADVARSEL

Usynlig laserstråling ved åpning, når sikkerhetsbryt eren er avslott. unngå utsettelse for stråling.

WARNING LABEL

1-4 (No.22009)

SECTION 2

Disassembly method

2.1 Main body section

2.1.1 Removing the top cover (See Figs.1 to 4.)

(1) From the right and left sides of the main body, remove the

four screws A attaching the top cover. (See Figs.1 and 2.)

(2) From the back side of the main body, remove the two

screws B attaching the top cover. (See Fig.3.)

(3) Lift the rear section of the top cover, slide the top cover

slightly in the direction of the arrow. (See Fig.4.)

(4) Disengage the engagement sections a of the top cover

from the main body. (See Fig.4.)

Top cover

TH-A75

Top cove

Rear panel

Fig.3

Fig.1

Top cover

Fig.4

Fig.2

(No.22009)1-5

TH-A75

2.1.2 Removing the front panel assembly (See Figs.5 to 8.)

• Remove the top cove r. (1) From the left side of the main body, push the section b of

the slide cam using the screw driver, etc. (See Fig.5.) (2) Pull out the tray. (See Fig.5.) (3) Push the tray fitting assembly of the tray in the direction of

the arrow and then remove the tray fitting assembly. (See

Fig.6.) (4) Return the tray into the DVD mechanism assembly. (5) From the bottom side of the main body, remove the four

screws C attaching the front panel assembly. (See Fig.7.) (6) From the top side of the main body, remove the two screws

D attaching the front panel assembly. (See Fig.8.) (7) Disconnect the card wires from the connectors CN206 and

CN207 on the main board. (See Fig.8.) (8) Remove the screw E attaching the lug wire. (See Fig.8.) (9) While opening the hooks c to the right and left sides of the

front panel assembly in the direction of the arrow 1, remove

the front panel assembly i n the direction of the arrow 2.

(See Fig.8.)

Reference:

In the assembly, through the card wire in the barrier and then hold the card wire to the sections d of the barrier. (See Fig.8.)

Front panel assembly

Tray

Barrier

Chassis base

Front panel assembly

Fig.7

Main board

CN207

Slide cam

Front panel assembly

Tray

Fig.5

Fig.6

Tray fitting assembly

CN206

Hook c

Front panel assembly

Fig.8

Lug wire

Hook c

D E

1-6 (No.22009)

TH-A75

2.1.3 Removing the DVD mechanism assembly ( See Fig.9.)

• Remove the top cove r.

• Remove the front panel assembly. (1) From the top side of the main body, remove the barrier. (2) Disconnect the card wires from the connectors CN208 and

CN209 on the main board.

(3) Remove the three screws F attaching the DVD mechanism

assembly.

(4) Take out the DVD mechanism assembly from the chassis

base.

Main board

Card wire

CN209 CN208

Card wire

Barrier

DVD mechanism assembly

Chassis base

Fig.9

2.1.4 Removing the DSP board (See Figs.10 and 11.)

• Remove the top cover. (1) From the top side of the main body, disconnect the card

wires from the connectors CN591 and CN592 on the DSP board. (See Fig.10.)

(2) From the back side of the main body, remove the three

screws G attaching the DSP board. (See Fig.11.)

(3) Remove the DSP board from the section e of the barrier,

take out the DSP board. (See Fig.10.)

Reference:

When attaching the DSP board, hang the DSP board to the section e of the ba rrier. (See Fig.10.)

2.1.5 Removing the tuner (See Figs.10 and 11.)

• Remove the top cover. (1) From the top side of the main body, disconnect the card

wire from the connector CN1 on the tuner. (See Fig.10.)

(2) From the back side of the main body, remove the two

screws H attaching the tuner. (See Fig.11.)

CN592

DSP board

Barrier

Card wires

Card wire

Rear panel

CN591

Fig.10

Fig.11

CN1

Tuner

(No.22009)1-7

TH-A75

2.1.6 Removing the main board (See Figs.12 and 13.)

• Remove the top cove r.

• Remove the DSP board.

• Remove the tune r. (1) From the top side of the main body, disconnect the card

wires from the connectors (CN201, CN202, CN204, CN206-CN209) on the main board. (See Fig.12.)

(2) Remove the screw J and two screws K attaching the main

board. (See Fig.12.)

(3) From the back side of the main body, remove the five

screws L attaching the main board. (See Fig.13.)

Card wires

CN207 CN202 CN201 CN204

CN208

CN209

Card wires

Main board

Fig.12

CN206

2.1.7 Removing the amplifier board (See Figs.14 to 16.)

• Remove the top cover. (1) From the top side of the main body, disconnect the card

wires from the connectors CN701 and CN702 on the amplifier board (See Fig.14.)

(2) Remove the three screws M attaching the amplifier board.

(See Fig.14.)

(3) From the back side of the main body, remove the four

screws N attaching the amplifier board. (See Fig.15.)

(4) Disconnect the connector CN703 on the amplifier board,

take out the amplifier board. (See Fig.14.)

(5) Remove the six screws P attaching the heat sink t o the am-

plifier board. (See Fig.16.)

Amplifier board

CN703

Rear panel

Fig.13

CN702CN701

Fig.14

Rear panel

Fig.15

Heat sink

Amplifier board

Fig.16

1-8 (No.22009)

TH-A75

2.1.8 Removing the fan motor (See Figs.17 and 18.)

• Remove the top cove r.

• Remove the amplifier board. (1) From the top side of the main body, remove the fan cover.

(See Fig.17.)

(2) Remove the tie band banding the fan motor wire and then

disconnect the fan motor wire from the connector CN174 on the power board. (See Fig.17.)

(3) Remove the screw Q and screw R attaching the fan brack-

et. (See Fig.17.)

(4) Remove the two screws S attaching the fan motor to the

fan bracket. (See Fig.18.)

Reference:

When attaching the screw Q, attach the lug wire of the front panel assembly at the same time.

Fan motor

Front panel assembly

Fan bracket

Lug wire

Fan cover

2.1.9 Removing the power board (See Fig.19.)

• Remove the top cover.

• Remove the amplifier board. (1) From the top side of the main body, disconnect the card

wires from the connectors CN172 and CN173 on the power board.

(2) Remove the tie band banding the fan motor wire and then

disconnect the fan motor wire from the connector CN174 on the power board.

(3) Disconnect the power cord from the connector CN101 on

the power board.

(4) Remove the screw T and three screws U attaching the

power board.

Fan motor wire

Tie band

CN174

CN173

CN172

Power board

Fan motor wire

Tie band

CN174

Power board

Fig.17

Fig.18

Fan motor

Fan bracke

CN101

Power cord

Fig.19

Card wires

(No.22009)1-9

TH-A75

2.2 Front panel assembly section

• Remove the top cove r.

• Remove the front panel assembly.

2.2.1 Removing the jack board (See Fig.1.)

(1) From the inside of the front panel assembly, disconnect the

wire from the connector CN403 on the switch board.

(2) Remove the two screws V attaching the jack holder, take

out the jack board together the jack holder.

Jack board

Wire

Jack holder

2.2.2 Removing the switch board (See Figs.2 and 3.)

(1) From the inside of the front panel assembly, disconnect the

wire from the connector CN403 on the switch board. (See Fig.2.)

(2) Remove the eight screws W attaching the switch board,

take out the switch board. (See Fig.2.)

Reference:

In the assembly, attach the switch board after attaching the push buttons and light lens as before. (See Fig.3.)

CN403

Switch board

Front panel assembly

Fig.1

Switch board

2.3 DVD mechanism section

• Remove the top cover.

• Remove the DVD mechanism assembly.

2.3.1 Removing the tray (See Figs.1 and 2.)

(1) From the left side of the DVD mechanism assembly, push

the slide cam in th e direction o f the arrow 1 and then pull out the tray in the direction of the arrow 2. (See Fig.1.)

(2) Push the tray stoppers a in the direction of the arrow 3, pull

out the tray in the direction of the arrow 4. (See Fig.2.)

2.3.2 Attaching the tray (See Fig.2.)

When attaching the tray, insert the tray to the rail of the DVD mechanism assembly and then pus h the tr ay in th e DVD mechanism assembly.

Tray

Slide cam

Fig.1

Tray stoppers a

Wire

CN403

Front panel assembly

Fig.2

Push button Push button

Light lens

Fig.3

2.2.3 Removing the standby board (See Fig.4.)

From the inside of the front panel assembly, remove the two screws X attaching the standby board.

Front panel assembly

Tray

DVD mechanism assembly

Fig.2

1-10 (No.22009)

Standby board

Fig.4

TH-A75

2.3.3 Removing the tray (See Fig.3.)

(1) From the bottom side of the DVD mechanism assembly,

disconnect the card wires from the connectors CN201 and CN202 on the DVD servo board.

Caution:

Be sure to solder the short land sections b on th e flexible wire before disconnecting the flexible wire from connector CN101 on the DVD servo board. If the flexible wire is disconnected without attaching solder, the DVD pickup unit may be destroyed by static electricity.

(2) Release the locks of the connector CN101 (in the direction

of the arrow 1) on the DVD servo board, disconnect the flexible wire.

(3) Release the locks of the connector CN101 on the DVD ser-

vo board in the direction of the arro w 1, disconnect the flexible wire.

Caution:

In the assembly, be sure to remove solders from the short land sections b after connecting the flexib le wire to the connector CN101 on the DVD servo board.

(4) While pushing the claw c of the DVD mechanism assembly

in the direction of the arrow 2, remove the DVD servo board in an upward direction.

Flexible wire

Short land sections b

DVD mechanism assembly

Card wire

2.3.4 Removing the clamper base (See Fig.4.)

(1) From the top side of the DVD mechanism assembly, re-

move the four screws A attaching the clamper base.

(2) Remove the clamper base from the bosses d of the loading

base in an upward direction, remove the clamper base from the sections e while sliding it in the direc tion of th e arrow.

DVD mechanism assembly

Boss d

2.3.5 Removing the tray drive board (See Fig.5.)

• Remove the clamper base. (1) From the bottom side of the DVD mechanism assembly, re-

move the solders from the soldered sections f on the tray drive board.

(2) Remove the screw B attaching the tray drive board to the

DVD mechanism assembly.

Soldered sections f

Clamper base

A A

Fig.4

Tray drive board

Section e

Loading base

Section e

CN201

Claw c

DVD servo board

2 22

CN101

Fig.3

Card wire

CN202

Claw c

Motor

DVD mechanism assembly

Fig.5

(No.22009)1-11

TH-A75

2.3.6 Removing the motor (See Fig.6.)

• Remove the clamper base.

• Remove the tray drive board. (1) From the top side of the DVD mechanism assembly, re-

move the belt of the pulley gear.

Note:

Take care not to attach grease on the belt.

(2) Remove the screw C attaching the motor to the DVD mech-

anism assembly.

DVD mechanism assembly

Pulley gear

Belt

Motor

Fig.6

2.3.7 Removing the DVD traverse mechanism assembly

(See Figs.7.)

• Remove the DVD servo board.

• Remove the clamper base. (1) From the top side of the DVD mechanism assembly, re-

move the four screws D attaching the DVD traverse mechanism assembly to the loading base.

(2) Take out the DVD traverse mechanism assembly from the

loading base.

DVD traverse mechanism assembly

2.3.8 Removing the DVD pickup unit (See Figs.8 to 10.)

• Remove the DVD servo board.

• Remove the clamper base.

• Remove the DVD traverse mechanism assembly. (1) From the top side of the DVD traverse mechanism assem-

bly, remove the screw E a ttaching the plate and torsion spring. (See Fig.8.)

(2) Remove the shaft from the section g and then remove the

shaft from the section h. (See Fig.9.)

(3) Disengage the section i of the DVD pickup unit and then re-

move the DVD pickup unit with the shaft. (4) Pull the shaft out of the DVD pickup unit. (5) Remove the two screws F attaching the SW. actuator.

2.3.9 Attaching the DVD pickup unit (See Figs.8,10 to 12) Reference:

Refer to the explanation of "Removing the DVD pickup unit" on the preceding page. (1) Attach the SW. actuator and shaft to the DVD pickup unit.

(See Fig.10.) (2) Engage the section i of the DVD pickup unit to the shaft of

the DVD traverse mechanism assembly first, and set the

both ends of the shaft of the DVD pickup unit in the sections

g and h of the DVD traverse mechanism assembly. (See

Fig.11.) (3) Slide the DVD pickup unit all the way in the direction of the

arrow. (See Fig.12.) (4) Mesh the lead screw to the section j of DVD pickup unit and

then set the end of the lead screw to the section k. (See

Fig.12.) (5) Attach the torsion spring. (See Fig.8.) (6) Attach the plate. (See Fig.8.)

Plate

Torsion spring

DVD pickup unit

1-12 (No.22009)

D D

Fig.7

Loading base

DVD traverse mechanism assembly

Fig.8

TH-A75

DVD pickup unit

Section i

SW. actuator

Shaft

Fig.9

Section h

Section g

DVD pickup unit

Shaf

Section

Shaft

Section

Section h

DVD traverse mechanism assembly

Fig.11

Section k

Fig.10

Section j

Lead scre

DVD pickup unit

Fig.12

(No.22009)1-13

TH-A75

2.3.10 Removing the spindle motor board (See Figs.13 and

14.)

• Remove the DVD servo board.

• Remove the clamper base.

• Remove the DVD traverse mechanism assembly. (1) From the top side of the DVD traverse mechanism assem-

bly, remove the feed motor wire that is soldered to the spi ndle motor board. (See Fig.13.)

(2) From the bottom side of the DVD traverse mechanism as-

sembly, remove the three screws G attaching the spindle motor board. (See Fig.14.)

Spindle motor board

Remove the solders.

Feed moto wire

2.3.11 Removing the feed motor (See Figs.15 to 17.)

• Remove the DVD servo board.

• Remove the clamper base.

• Remove the DVD traverse mechanism assembly. (1) From the top side of the DVD traverse mechanism assem-

bly, remove the feed motor wire that is soldered to the spi ndle motor board. (See Fig.15.)

(2) Remove the screws H attaching the feed holder assembly

and then take out the feed holder assembly. (See Fig.15.)

(3) Remove the screw J attaching the thrust spring. (See

Fig.16.)

(4) Remove the feed gear and lead screw in the direction of the

arrow. (See Fig.16.)

(5) Remove the two screws K attaching the feed motor. (See

Fig.17.)

Spindle motor board

Remove the solders.

Feed holder assembly

Feed motor wire

Feed motor

DVD traverse mechanism assembly

Fig.13

DVD traverse mechanism assembly

Fig.14

DVD traverse mechanism assembly

Fig.15

Feed holder assembly

Lead screw

Feed motor

Feed gear

Thrust spring

Fig.16

Feed holder assembly

1-14 (No.22009)

Fig.17

SECTION 3

Adjustment

3.1 Test mode

(1) The AC cord is connected after pushing the STOP key and the EJECT key of a main body. (2) Change to test mode, FL indicate "TEST ??". (?? is version)

At this time, TV monitor indicate the firm number " ".

(3) Press PAUSE key of the main body, EEPROM initialize is start.

FL indicate "RDS", EEPROM initialize is complete.

(4) Release the test mode by power to off.

3.2 Up grade

3.2.1 How to UPGRADE

(1) Power to on then mode to DVD. (2) Set the recorded disc.

(Down loaded the up grade program "TH-A75 -Firmware Update Procedure" from Audio Products DIV.

Technological Material of JS-Net .) (3) FL indicate "UPGRADE", press cursol key of the remote controller. (4) TV monitor indication the UPGRADE condition. (5) Upgrade is complete, disc is automatically eject then finish the upgrade.

TH-A75

3.2.2 After UPGRADE

After upgrade, it is should done the EEPROM initialize and confirm the firm number.

(1) Tray close then release the AC cord. (2) The AC cord is connected after pushing the STOP key and the EJECT key of a main body. (3) Change to test mode, FL indicate "TEST ??". (?? is version)

In this time, confrim the TV monitor indicate the firm number "114". (4) EEPROM initialize start by press the PAUSE key of main body.

FL indicate "RDS", EEPROM initialize is complete. (5) Release the test mode by power to off.

(No.22009)1-15

TH-A75

4.1 UPD784215AGC194 (IC531) : CPU

• Pin layout

75 ~ 51

SECTION 4

Description of major ICs

100

1 ~ 25

• Pin function Pin No. Symbol I/O Function

1~8 - - Not use

9VDD-+3.0V 10 X2 I Main system clock input 11 X1 I Main system clock input 12 VSS - GND 13 XT2 - OPEN 14 XT1 I Connect to VSS 15 RESET I Reset for Flash write 16 - - Not use 17 INT0 I Error input0 (detect UNLOCK) 18 INT1 I Error input1 (detect Non Audio) 19 DZF I GND

20~22 - - Not use

23 AVDD - The same potential as VDD 24 AV REF0 - The same potential as VSS 25 - - Not use 26 CS1 I Chip select input port 27 CS2 I Chip select input port 28 CS3 I Chip select input port 29 CS4 I Chip select input port

30~32 - - Not use

33 AVSS - The same potential as VSS

34, 35 - - Not use

36 AV REF1 - The same potential as VDD 37 RX O For flash write 38 TX O For flash write 39 - - Not use 40 DSP_COM I Command (serial 1) 41 DSP_STS O Status (Serial 1) 42 DSP_CLK I Clock (Serial 1) 43 DSP_RDY I Ready 44 - - Not use 45 MIDIO_IN I Data in (Serial 0) 46 MIDIO_OUT O Data out (Serial 0) 47 MICK O Clock (Serial 0)

Pin No. Symbol I/O Function

48 HREQ I HREQ 49 SS O Sla ve select

50,51 - - Not use

52 DSP_RST O DSP RESET 53 - - Not use 54 DA_CS O Chip select output 55 - - Not use 56 PD/DA O Power down output (RESET) 57 PD O Power down output (RESET)

58~63 - - Not use

64 CODEC_D-OUT O Data out 65 CODEC_D-IN I Data in 66 CODEC_CLK O Clock 67 CODEC_CS O Chip select output 68 DEBUG1 O Debug out port 69 DEBUG2 O Debug out port 70 DEBUG3 O Debug out port 71 GEBUG4 O Debug out port 72 GND - GND

73~75 - - Not use

76 EQ O EQ 77 CTR_TONE O Center tone 78 3D O 3D-Phonic

79, 80 - - Not use

81 VDD - +3.0V

82, 83 - - Not use

84 ANA/T.TUNE O ANALOG./T.TONE 85 LFE.MIX O LFE MIX CONTROL 86 LEF_OUT O LFE OUT CONTROL 87 - - Not use 88 S.MUTE O S.MUTE

89~93 - - Not use

94 TEST O Usual "VSS"

95~100 - - Not use

1-16 (No.22009)

4.2 39VF0207CWHQ01 (IC524) : 2 Mbit multi-purpose flash memory

• Pin layout • Block diagram

A11

A8 A13 A14 A17

WE#

NC A16 A15 A12

A7 A6 A5 A4

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

Top view

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

OE# A10 CE# DQ7 DQ6 DQ5 DQ4 DQ3 V

DQ2 DQ1 DQ0 A0 A1 A2 A3

Memory Address

CE#

OE#

WE#

• Pin function Pin No. Symbol Function

1 - 6 A11,A9,A8

Address inputs

A13,A14,A17 7 WE# Write enable 8 VDD Power supply 9 NC Not connect

10 - 20 A16,A15,A12

Address inputs

A7 - A0

21 - 23 DQ0 - DQ2 Data inputs/outputs

24 VSS Ground

25 - 29 DQ3 - DQ7 Data inputs/outputs

30 CE# Chip enable 31 A10 Address input 32 OE# Output enable

X-Decoder

Address Buffers

and

Latches

Control Logic

SuperFlash

Memory

Y-Decoder

I/O Buffers

and

Data Latches

DQ7 - DQ0

TH-A75

(No.22009)1-17

TH-A75

4.3 AK4586VQ (IC511) : A/D, D/A Converter

• Pin layout

44 - 34

11 - 1

12 - 22

23 - 33

• Pin function

Pin No. Symbol I/O Function

1 XTO O X'tal output pin 2 XTI I X'tal input pin

EXTCLK I External master clock input pin 3 TVDD - Output buffer power supply pin, 2.7V~5.5V 4 VDSS - Digital Ground pin, 0V 5 DVDD - Digital pow er supp ly pin, 4.5V~5 .5V 6 TX O Transmit channel (through data) output pin 7 MCKO O Master clock outp ut pin 8 LRCK I/O Input/Output channel clock pin 9 BICK I/O Audio serial data clock pin

10 SDTO O Audio serial data output pin 11 SDTI1 I DAC1 audio serial data input pin 12 SDTI2 I DAC2 audio serial data input pin 13 SDTI3 I DAC3 audio serial data input pin 14 INT0 O Interrupt 0 pin 15 INT2 O Interrupt 1 pin 16 CDTO O Control data output pin in 4-wire serial control mode

CAD1 I Chip address 1 pin in I2C bus control mode

17 CDTI I Control data input pin in 4-wire serial control mode

SDA I/O Control data input/output pin in I2C bus control mode

18 CCLK I Control data clock pin in 4-wire serial control mode

SCL I Control data clock pin in I2C bus control mode

19 CSN I Chip select pin in 4-wire serial control mode

CAD0 I Chip address 0 pin in I2C bus control mode

20 DZF2 O Zero input detect 2 pin

OVF O Analog input ove rflow detect pin 21 AVSS - Analog ground pin, 0V 22 AVDD - Analog power supply pin, 4.5V~5.5V 23 VREFH I Positive voltage reference input pin, AVDD 24 VCOM O Common voltage output pin, AVDD/2 25 DZF1 O Zero input detect 1 pin 26 LOUT3 O DAC3 Lch analog output pin 27 ROUT3 O DAC3 Rch analog output pin 28 LOUT2 O DAC2 Lch analog output 29 ROUT2 O DAC2 Rch analog output pin 30 LOUT1 O DAC1 Lch analog output pin 31 ROUT1 O DAC1 Rch analog output pin 32 LIN I Lch analog input pin 33 RIN I Rch analog input pin 34 PCDD - PLL power supply pin, 4.5V~5.5V 35 R - External resistor pin 36 PVSS - Pll ground pin, 0V 37 RX4 I Receiver channel 4 pin (internal biased pin) 38 SLAVE I Slave mode pin 39 RX3 I Receiver channel 3 pin (internal biased pin) 40 TST I Test pin 41 RX2 I Receiver channel 2 pin (internal biased pin) 42 I2C I Control mode select pin 43 RX1 I Receiver channel 1 pin (internal biased pin) 44 PDN I Power-Down & Reset pin

1-18 (No.22009)

• Block diagram

CSN

CCLK

CDTI

TH-A75

CDTO

LIN

RIN

LOUT1

ROUT1

LOUT2

ROUT2

LOUT3

ROUT3

ADC HPF

DAC DATTLPF

Audio

I/F

MCLK

SDOUT

BICK

LRCK

SDIN1 SDIN2 SDIN3

uP I/F

Clock

Recovery

DAIF

Decoder

DEM

X'tal

Oscillator

Clock

Generator

Input

Selector

XTI

XTO

MCKO

RX1 RX2 RX3 RX4

SDOUT

BICK LRCK

SDIN1 SDIN2 SDIN3

(No.22009)1-19

TH-A75

4.4 MM74HCT32MTC-X (IC521) : Quad 2 input OR gate

• Pin layout & Block diagram

• Truth table

11A 21B 31Y 42A 52B 62Y 7

14 13 12 11 10 9 8GND

V 4B 4A 4Y 3B 3A 3Y

(TOP VIEW)

4.5 74LCX373MTC-X (IC512,IC513) : Octal D-type latch

• Pin layout • Truth table

20 19 18 17 16 15 14D2 13 12 11

VCC Q7 D7 D6 Q6 Q5 D5 D4 Q4 LE

1OE 2Q0 3D0 4D1 5Q1 6Q2 7 8D3 9Q3

10GND

(TOP VIEW)

INPUTS OUTPUT

ABY

LLL

LHH HLH HHH

INPUTS OUTPUT

LE D Y

HXXZ

LLXQn LHLL LHHH

X: Don't care Z: High impedance Qn: Q outputs are latched at the time when t he LE input is tak-

en to a low logic level.

•Block diagram

D2 7

1-20 (No.22009)

4.6 AK4382AVT-X (IC512) : D/A Converter

• Pin layout

1 2 3 4 5 6 7 8

• Block diagram

CSN

CCLK

16 15 14 13 12 11 10 9

Interface

CDTI

De-empahsis

Control

MCLK

Clock

Divider

TH-A75

VDD VSS

DZFL DZFR

LRCK

BICK SDTI

Audio

Data

Interface

Interpolator

Modulator

PDN

• Pin function Pin No. Symbol I/O Function

1 MCLK I Master Clock Input Pin 2 BICK I Audio Serial Data Clock Pin 3 SDTI I Audio Serial Data Input Pin 4 LRCK I L/R Clock Pin 5 PDN I Power-Down Mode Pin 6 CSN I Chip Select Pin 7 CCLK I Control Data Input Pin 8 CDTI I Control Data Input Pin

9 AOUTR- O Rch Negative Analog Output Pin 10 AOUTR+ O Rch Positive Analog Output Pin 11 AOUTL- O Lch Negative Analog Output Pin 12 AOUTL+ O Lch Positive Analog Output Pin 13 VSS - Ground Pin 14 VDD - Power Supply Pin 15 DZFR O Rch Data Zero Input Detect Pin 16 DZFL O Lch Data Zero Input Detect Pin

SCF

AOUTL+ AOUTL-

AOUTR+ AOUTR-

(No.22009)1-21

TH-A75

4.7 AK93C65AF-X (IC510) : EEPROM

• Pin layout

VCC

•Block diagram

8 PIN SOP

INSTRUCTION

GND

INSTRUCTION

DECODE,

CONTROL

AND

CLOCK

GENERATION

DATA

R/W AMPS

AND

AUTO ERASE

EEPROM

4096bit

ADD.

BUFFERS

DECODER

256 x 16

• Pin function Pin no. Symbol Function

1 PE Program enable (With built-in pull-up resistor) 2 VCC Power supply 3 CS Chip selection 4 SK Cereal clock input 5 DI Cereal data input 6 DO Cereal data output 7 GND Ground 8 NC No connection

NOTE :

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

VREF

VPP SW

VPP

GENERATOR

1-22 (No.22009)

4.8 AN8703FH-V (IC101) : Frontend processor for DVD

• Pin layout

64 49

TH-A75

17 32

• Pin function

Pin No.

Symbol I/O Description 1 LPC1 I Laser input terminal (DVD) 2 LPC01 O Laser drive signal output terminal (DVD) 3 LPC2 I Laser input terminal (CD) 4 LPC02 O Laser drive signal output terminal (CD) 5

VFOSHORT 6 TBAL I Tracking balance control terminal 7 FBAL I Focus balance control terminal 8 POFLT O Track detection threshold level terminal 9 DTRD I Data slice part data read signal input ter-

10 IDGT I Data slice part address part gate signal

11 STANDBY I Standby mo de control te rm in al 12 SEN I SEN(Serial data input terminal) 13 SCK I SCK(Ser ial data input terminal) 14 STDI I STDI(Serial data input terminal) 15 RSCL I Standard electric current terminal 16 JLINE I Electric curr ent setting terminal of JLine 17 TEN I Reversing input terminal of tracking error

18 TEOUT O Tracking error signal output terminal 19 AGCBAL I Offset adjusting terminal 1 20 AS OUT O Full adder signal output terminal 21 FEN I Focus error output amplifier reversing in-

22 FEOUT O Focus error signal output terminal 23 AGCOFST I Offset adjusting terminal 2 24 MON - Non connect 25 AGCLVL O Output amplitude adjustment for DRC 26 GND2 - Connect to GND 27 VREF2 O VREF2 voltage output termina l 28 VCC2 - Power supply terminal 5V 29 VHALF O VHALF voltage output termina l 30 DFLTON O Reversing output terminal of filter AMP. 31 DFLTOP O Filter AMP. output terminal 32 DCFLT I Capacity connection terminal for filter

I VFOSHORT control terminal

minal(For RAM)

input terminal( For RAM)

output AMP.

put terminal

output

Pin No.

Symbol I/O Description 33 GND3 - Connect to GND 34 RFDIFO - Non connect 35 RFOUT - Connect to TP103 36 VCC3 - Power supply terminal 3.3V 37 RFC O Filter for RF delay correction AMP. 38 DCRF O All addition amplifier capacitor terminal 39 OFTR O OFTR output terminal 40 BDO O BDO output terminal 41 RFENV O RF envelope output terminal 42 BOTTOM O Bottom envelope detection filter terminal 43 PEAK O Peak envelope detection filter terminal 44 AGCG O AGC amplifier gain control terminal 45 AGCO O AGC amplifier level control terminal 46 TESTSG I TEST signal input terminal 47 RFINP I RF signal positive input terminal 48 RFINN I RF signal negative input terminal 49 VIN5 I Internal four-partition (CD) RF input 1 50 VIN6 I Internal four-partition (CD) RF input 2 51 VIN7 - Internal four-partition (CD) RF input 3 52 VIN8 - Internal four-partition (CD) RF input 4 53 V I N9 I External two-partition (DVD) RF input 2 54 VIN10 I External two-partition (DVD) RF input 1 55 VCC1 - Power supply terminal 5V 56 VREF1 O VREF1 voltage output terminal 57 VIN1 I Internal four-partition (DVD) RF input 1

58 VIN2 I Internal four-partition (DVD) RF input 2

59 VIN3 I Internal four-partition (DVD) RF input 3

60 VIN4 I Internal four-partition (DVD) RF input 4

61 GND1 - Connect to GND 62 VIN11 I 3 beam sub input terminal 2 (CD) 63 VIN12 I 3 beam sub input terminal 1 (CD) 64 HDTYPE O HD Type selection

(No.22009)1-23

TH-A75

4.9 BA6664FM-X (IC251) : Motor driver

• Pin layout

29 30

GND

H1+

H1-

H2+

H2-

H3+

H3-

•Block diagram

RNF

GSW

Vcc

ECR

FG2

CNF

VH-

GND

H1+

H1-

H2+

H2-

H3+

H3-

27 26

24 23

21 20

19 18

16 15

GSW

VCC

ECR

FG2

CNF

DRIVER

GAIN

CONTROL

CURRENT

SENSE AMP

TSD

GAIN

SWITCH

VCC

+ -

HALL AMP

D Q

CK Q

TOROUE

SENSE AMP

VCC

SHORT BRAKE

BRAKE MODE

Hall Bias

1-24 (No.22009)

• Pin function Pin No. Symbol I/O Description

1 NC - Non connect 2 A3 O Output 3 for spindle motor 3 NC - Non connect 4 A2 O Output 2 for spindle motor 5 NC - Non connect 6 NC - Non connect 7 A1 O Output 1 for spindle motor 8 GND - Connect to ground

9 H1+ I Positive input for hall input AMP 1 10 H1- I Negative input for hall input AMP 1 11 H2+ I Positive input for hall input AMP 2 12 H2- I Negative input for hall input AMP 2 13 H3+ I Positive input for hall input AMP 3 14 H3- I Negative input for hall input AMP 3 15 VH I Hall bias terminal 16 BR - Non connect 17 CNF - Capacitor connection pin for phase compensation 18 SB I Short brake terminal 19 FG2 - Non connect 20 FR - Non connect 21 ECR I Torque control standard voltage input terminal 22 EC I Torque control voltage input terminal 23 PS O Start/stop switch (power save terminal) 24 FG O FG signal output terminal 25 VCC - Power supply for signal division 26 GSW O Gain switch 27 VM - Power supply for driver division 28 RNF O Resistance connection pin for output current sense 29 - Connect to ground 30 - Connect to ground

TH-A75

(No.22009)1-25

TH-A75

4.10 BA15218F-XE (IC251/IC540/IC544/IC546/IC548/IC557/IC560/IC562/IC564/IC566/IC711/IC712) : Dual operational amplifier

• Pin layout

OUT1 1

-IN1 2

+IN1 3

VEE 4

•Block diagram

Vcc

-IN

+IN

Q3 Q4

8 Vcc

7 OUT2

6 -IN2

5 +IN2

Q10

Q11

Q12

Q18Q13

OTHER

Q19

Q17Q16

VEE

R3R2

Q14 Q15Q114

OUTPUT

1-26 (No.22009)

4.11 BA5983FM-X (IC201) : 4-channel driver

• Block diagram

Vcc

10k

20k

23 22 30

10k

20k

STAND BY CH4

Vcc

10k

Level Shift

17 16

10k

TH-A75

10k

Level Shift

10k

• Pin function Pin No. Symbol I/O Description

1 BIAS IN I Input for Bias-amplifier 2 OPIN1(+) I Non inverting input for CH1 OP-AMP 3 OPIN1(-) I Inverting input for CH1 OP-AMP 4 OPOUT1 O Output for CH1 OP-AMP 5 OPIN2(+) I Non inverting input for CH2 OP-AMP 6 OPIN2(-) I Inverting input for CH2 OP-AMP 7 OPOUT2 O Output for CH2 OP-AMP 8 GND - Substrate ground

9 STBY1 I Input for CH1/2/3 stand by control 10 PowVcc1 - Vcc for CH1/2 power block 11 VO2(-) O Inverted output of CH2 12 VO2(+) O Non inverted output of CH2 13 VO1(-) O Inverted output of CH1 14 VO1(+) O Non inverted output of CH1 15 VO4(+) O Non inverted output of CH4

Level Shift

10k

Level Shift

10k

STAND BY CH1/2/3

729 891011121314

Vcc

Pin No. Symbol I/O Description

16 VO4(-) O Inverted output of CH4 17 VO3(+) O Non inverted output of CH3 18 VO3(-) O Inverted output of CH3 19 PowVcc2 - Vcc for CH3/4 power block 20 STBY2 I Input for Ch4 stand by control 21 GND - Substrate ground 22 OPOUT3 O Output for CH3 OP-AMP 23 OPIN3(-) I Inverting input for CH3 OP-AMP 24 OPIN3(+) I Non inverting input for CH3 OP-AMP 25 OPOUT4 O Output for CH4 OP-AMP 26 OPIN4(-) I Inverting input for CH4 OP-AMP 27 OPIN4(+) I Non inverting input for CH4 OP-AMP 28 PreVcc - Vcc for pre block 29 - Connect to ground 30 - Connect to ground

(No.22009)1-27

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