Jvc XV-N352-S, XV-N350-B Service Manual

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7

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M

DEL

: XV-N350B

XV-N352

DVD-VIDE

PLAYE

MODELS : XV-N350B/XV-N352

P/NO :

31629394MAR

200

CONTENTS

SECTION 1.........SUMMARY

SECTION 2.........CABINET & MAIN CHASSIS

SECTION 3.........ELECTRICAL

SECTION 4.........MECHANISM (DP-11)

SECTION 5.........REPLACEMENT PARTS LIST

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR DVD PRODUCTS..................................1-3

SERVICING PRECAUTIONS....................................................................................................................1-4

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

SERVICE INFORMATION FOR EEPROM ...........................................................................................1-5

SPECIFICATIONS ........................................................................................................................................1-6

1-2

PRODUCT SAFETY SERVICING GUIDELINES FOR DVD PRODUCTS

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audio-video service
technicians.
When servicing this product, under no circumstances should the original design be
modified or altered without permission from JVC. All components should be replaced
only with types identical to those in the original circuit and their physical location, wiring
and lead dress must conform to original layout upon completion of repairs.

Special components are also used to prevent x-radiation, shock and fire hazard.
These components are indicated by the letter “x” included in their component
designators and are required to maintain safe performance. No deviations are
allowed without prior approval by LG Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes into the
set are not delayed until the new service literature is printed.

CAUTION

customized installations without manufacturer’s approval. Unauthorized
modifications will not only void the warranty, but may lead to property damage or user
injury.

Service work should be performed only after you are thoroughly familiar with these
safety checks and servicing guidelines.

GRAPHIC SYMBOLS

SERVICE INFORMATION

While servicing, use an isolation transformer for protection from AC line shock. After
the original service problem has been corrected, make a check of the following:

FIRE AND SHOCK HAZARD

1. Be sure that all components are positioned to avoid a possibility of adjacent

2. Verify that all protective devices such as insulators, barriers, covers, shields, strain

3. Soldering must be inspected to discover possible cold solder joints, solder

4. Check for physical evidence of damage or deterioration to parts and components,

5. No lead or component should touch a high current device or a resistor rated at 1

6. After reassembly of the set, always perform an AC leakage test on all exposed

: Do not attempt to modify this product in any way. Never perform

The exclamation point within an equilateral triangle is intended to alert
the service personnel to important safety information in the service
literature.
The lightning flash with arrowhead symbol within an equilateral
triangle is intended to alert the service personnel to the presence of
noninsulated “dangerous voltage” that may be of sufficient magnitude
to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within an equilateral
triangle is intended to convey to the service personnel the following
fuse replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF
FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND
RATING AS MARKED NEAR EACH FUSE.

component shorts. This is especially important on items trans-ported to and from
the repair shop.

reliefs, power supply cords, and other hardware have been reinstalled per the
original design. Be sure that the safety purpose of the polarized line plug has not
been defeated.

splashes, or sharp solder points. Be certain to remove all loose foreign particles.

for frayed leads or damaged insulation (including the AC cord), and replace if
necessary.

watt or more. Lead tension around protruding metal surfaces must be avoided.

metallic parts of the cabinet (the channel selector knobs, antenna terminals,
handle and screws) to be sure that set is safe to operate without danger of
electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING
THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity
in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15
mfd 150V AC type capacitor between a known good earth ground water pipe,
conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC
voltage across the combination of 1500 ohm resistor and .15 mfd capacitor.
Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage
measurements for each exposed metallic part. Voltage measured must not
exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value
exceeding this limit constitutes a potential shock hazard and must be corrected
immediately.

TIPS ON PROPER INSTALLATION

1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf
space over, or close to, a heat duct, or in the path of heated air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations where dew
is a factor, near steam radiators where steam leakage is a factor, etc.

3. Avoid placement where draperies may obstruct venting. The customer should also
avoid the use of decorative scarves or other coverings that might obstruct
ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kit must follow
the factory-approved mounting instructions. A product mounted to a shelf or
platform must retain its original feet (or the equivalent thickness in spacers) to
provide adequate air flow across the bottom. Bolts or screws used for fasteners
must not touch any parts or wiring. Perform leakage tests on customized
installations.

5. Caution customers against mounting a product on a sloping shelf or in a tilted
position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small casters
across thresholds or deep pile carpets.

7. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous consequences to
home and family.

1-3

SERVICING PRECAUTIONS

CAUTION: Before servicing the DVD covered by this service
data and its supplements and addends, read and follow the
SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances
create conflict between the following servicing precautions
and any of the safety precautions in this publication, always
follow the safety precautions.
Remember Safety First :

General Servicing Precautions

1.Always unplug the DVD AC power cord from the AC power
source before:
(1) Removing or reinstalling any component, circuit board,

module, or any other assembly.

(2) Disconnecting or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an

electrolytic capacitor.
Caution: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an
explosion hazard.

2.Do not spray chemicals on or near this DVD or any of its
assemblies.

3.Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unless specified otherwise in this service data, lubrication
of contacts is not required.

4.Do not defeat any plug/socket B+ voltage interlocks with
which instruments covered by this service manual might
be equipped.

5.Do not apply AC power to this DVD and / or any of its
electrical assemblies unless all solid state device heat
sinks are correctly installed.

6.Always connect the test instrument ground lead to an
appropriate ground before connecting the test instrument
positive lead. Always remove the test instrument ground
lead last.

Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet and turn
the power on. Connect an insulation resistance meter (500V)
to the blades of the attachment plug. The insulation
resistance between each blade of the attachment plug and
accessible conductive parts (Note 1) should be more than
1Mohm.
Note 1: Accessible Conductive Parts include Metal panels,
Input terminals, Earphone jacks,etc.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field
effect transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.

1.Immediately before handling any semiconductor
component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known
earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device,
which should be removed for potential shock reasons prior
to applying power to the unit under test.

2.After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such
as aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.

3.Use only a grounded-tip soldering iron to solder or
unsolder ES devices.

4.Use only an anti-static solder removal device. Some solder
removal devices not classified as “anti-static” can generate
electrical charges sufficient to damage ES devices.

5.Do not use freon-propelled chemicals. These can generate
an electrical charge sufficient to damage ES devices.

6.Do not remove a replacement ES device from its
protective package until immediately before you are ready
to install it. (Most replacement ES devices are packaged
with leads electrically shorted together by conductive
foam, aluminum foil, or comparable conductive material).

7.Immediately before removing the protective material from
the leads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.

Caution: Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.

8.Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion such
as the brushing together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static
electricity sufficient to damage an ES device.)

1-4

SERVICE INFORMATION FOR EEPROM

POWER ON

DVD LOGO Status (NO Disk status)

Remotecontrol
Pause key-->1-->4-->7-->2 in order.

Press number 0~8, Press charater
A~F (1~6 for a while)

Use arrow key (F D G E) to move
to approprite position and make
changes

Press pause key once

DETECT NEW EEPROM
(OPTION EDIT SCREEN)

MODEL: XV-N350B/XV-N352S
NAME HEX

OPT 1 00
OPT 2 00
OPT 3 00
OPT 4 00
OPT 5 00
OPT 6 00
OPT 7 00
OPT 8 00

Change will be applied when power

OFF-->ON.

1-5

SPECIFICATIONS

• GENERAL

Power requirements : AC 200 ~ 240V, 50/60Hz

Power consumption : 8W

Dimensions (Approx.) : 430 x 35 x 202mm (17 x 1.4 x 7.9inches)

(W x H x D) without foot

Net Weight (Approx.) : 1.6kg (3.5lbs)

Operating temperature : 5°C to 35°C (41°F to 95°F)

Operating humidity : 5% to 90%

• OUTPUTS

VIDEO OUT : 1.0V(p-p), 75Ω, sync negative, RCA jack x 1 / SCART (TO TV)

AUDIO OUT : 2.0Vrms (1KHz, 0dB), 600Ω, RCA jack (L, R) x 1 / SCART (TO TV)

DIGITAL OUT (COAXIAL) : 0.5V(p-p), 75Ω, RCA jack x 1

SCART Model only

• SYSTEM

Laser : Semiconductor laser, wavelength 650nm

Signal system : PAL / NTSC

Frequency response : DVD (PCM 96 kHz) : 8Hz to 44kHz

DVD (PCM 48 kHz) : 8Hz to 22kHz

CD : 8Hz to 20kHz

Signal-to-noise ratio : More than 90dB (ANALOG OUT connectors only)

Harmonic distortion : Less than 0.02%

Dynamic range : More than 95dB (DVD/CD)

Accessories : Video cable (1), Audio cable (1), Remote control (1), Batteries (2)

1-6

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS .....................................................................................................................................2-2

1. CABINET AND MAIN FRAME SECTION ..................................................................................................2-2

2. DECK MECHANISM SECTION (DP-11) ...................................................................................................2-3

3. PACKING ACCESSORY SECTION...........................................................................................................2-4

2-1

OPTIONAL PART

C

B

462

460

460

460

250

462

A44

A

300

A26

283

261

261

260

262

320

467

465

261

D

A

C

B

462

462

A48

A46

P101

A47

MAIN

SMPS

5.1CH

SCART

452

D

A43

A49

CABLE1

CN903

452

280

KEY

TIMER

452

A42

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION

2-2

2. DECK MECHANISM SECTION (DP-11)

A26

A02

439

018

013

017

014

001

002

003

020

016

015B

015A

435

015

019

440

432

012A

010

439

431

435

030

024

025

036

A03

430

021

012A

012

012

026

A01

2-3

3. PACKING ACCESSORY SECTION

808 BATTERY

810 CABLE SET ASS’Y

811 PLUG ASS’Y 1WAY(YELLOW)

812 PLUG ASS’Y 2WAY

801 OWNER’S MANUAL

804 PACKING SHEET

803 PACKING

900 REMOCON

803 PACKING

802 BOX CARTON

2-4

SECTION 3

ELECTRICAL

CONTENTS

ELECTRICAL TROUBLESHOOTING GUIDE.....................................................................................3-2

1. POWER CHECK FLOW ..........................................................................................................................3-2

2. SYSTEM OPERATION FLOW.................................................................................................................3-3

3. SYSTEM TEST FLOW.............................................................................................................................3-4

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING

1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL....................................................................3-10

2. SDRAM CLOCK.....................................................................................................................................3-12

3. TRAY OPEN/CLOSE SIGNAL ...............................................................................................................3-12

4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)............................................................3-13

5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION) ..........................................................3-13

6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION) ..........................................3-14

7. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) ...............................................................3-14

8. FOCUS ON WAVEFORM......................................................................................................................3-15

9. RACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING) ......................................................3-16

10. ZR966 AUDIO COAXIAL OUTPUT (SPDIF) .........................................................................................3-17

11. ZR966 VIDEO OUTPUT WAVEFORM...................................................................................................3-17

12. AUDIO OUTPUT FROM ZR966 ............................................................................................................3-18

CONNECTOR PICTURE ..........................................................................................................................3-19

1. ALL CONNECTOR PICTURE ................................................................................................................3-19

2. P2201 CONNECTOR PICTURE............................................................................................................3-20

3. P2202 CONNECTOR PICTURE............................................................................................................3-20

4. PW6101 CONNECTOR PICTURE ........................................................................................................3-21

5. P6501 CONNECTOR PICTURE............................................................................................................3-21

6. P6602 CONNECTOR PICTURE............................................................................................................3-22

7. P6901 CONNECTOR PICTURE............................................................................................................3-22

8. P7301 CONNECTOR PICTURE............................................................................................................3-23

BLOCK DIAGRAMS ..................................................................................................................................3-24

1. OVERALL BLOCK DIAGRAM ...............................................................................................................3-24

2. POWER SUPPLY BLOCK DIAGRAM ...................................................................................................3-25

3. SERVO BLOCK DIAGRAM ...................................................................................................................3-26

4. MPEG & MEMORY BLOCK DIAGRAM.................................................................................................3-27

5. VIDEO BLOCK DIAGRAM.....................................................................................................................3-28

6. AUDIO BLOCK DIAGRAM.....................................................................................................................3-29

CIRCUIT DIAGRAMS................................................................................................................................3-31

1. POWER (SMPS) CIRCUIT DIAGRAM ..................................................................................................3-31

2. SYSTEM (MPEG) CIRCUIT DIAGRAM.................................................................................................3-33

3. SERVO CIRCUIT DIAGRAM.................................................................................................................3-35

4. AV/JACK CIRCUIT DIAGRAM ...............................................................................................................3-37

5. TIMER/KEY CIRCUIT DIAGRAM ..........................................................................................................3-39

CIRCUIT VOLTAGE CHART...................................................................................................................3-41

PRINTED CIRCUIT BOARD DIAGRAMS...........................................................................................3-43

1. MAIN P.C.BOARD..................................................................................................................................3-43

2. KEY P.C.BOARD ...................................................................................................................................3-45

3. TIMER P.C.BOARD ...............................................................................................................................3-45

4. SMPS P.C.BOARD ................................................................................................................................3-47

5. SCART P.C.BOARD (SCART MODEL ONLY).......................................................................................3-47

.........................................3-10

3-1

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER CHECK FLOW

A. B.

No 5V No 3.3VA.

Is 3.3VA

section working?

YES

Is 5.6V present at

collector of Q126?

YES

Replace Q126. Check FR101 Replace Q121.

NO

No 3.3VA

Is there a DC voltage at

cathode of D105 or D107?

NO

NO

NO

Is 3.3VA

section working?

YES

Is 3.3V

present at emitter

of Q121?

YES

YES

Check D105/D106/D107/

D108 and replace.

YES

Replace IC101.

3-2

ELECTRICAL TROUBLESHOOTING GUIDE

2. SYSTEM OPERATION FLOW

Power on

1. 8032 initializes SERVO,DSP & RISC registers

2. Write RISC code to SDRAM

3. Reset RISC

Show LOGO

YES

Tray close to closed position

SLED moves to inner position

1. Judge whether have disc and disc type

2. Jump to related disc reading procedure

Recieve OPEN/CLOSE Key?

Tray closed ?

NO

SLED at inner side ?

NO

YES

YES

NO

1. Execute pressed Key & IR key

2. System operation routine loop

1. Stop playback & open Tray

2. Display tray open message & LOGO

NO

Receive CLOSE Key?

YES

3-3

ELECTRICAL TROUBLESHOOTING GUIDE

3. SYSTEM TEST FLOW

TEST

Check the AC

Voltage Power PCBA (110V

or 220V)

YES

Switch on the power PCBA

Is the DC

voltage outputs OK?

(5V, 3.3V, 12V, 5.6V

MOTOR)

YES

Make sure the main PCBA don't

short on VCCs and switch it on.

YES

Is 3.3V

and 1.8V DC outputs normal

on main PCBA?

YES

NO

NO

NO

Replace power PCBA or AC transformer.

Repair or Replace power PCBA

Check the regulators or related diodes.

Connect to PC RS232 cable and

update the FLASH memory code.

Update FLASH

successfully?

YES

A

NO

1. Check 27MHz system clock.

2. Check system reset circuit.

3. Check FLASH R/W enable signal PRD,
RWR.

4. Check RS232 SIGNALS.

5. Check FLASH Memory related circuit.

3-4

ELECTRICAL TROUBLESHOOTING GUIDE

A

RESET or power on.

Show LOGO?

YES

Does

Tray move inside

when it is not at closed

position?

NO NO

Flash

memory operates

properly?

YES

SDRAM

NO

works properly?

YES

ZR966

VIDEO outputs

NO

properly?

YES

Have TV

NO

signal output?

YES

Check AV cable

connection to TV set.

NO

Normal

TROUT & TRIN

NO

signals?

YES

Check connection lines

between FLASH & ZR966

and the FLASH access time

whether is suitable or not.

Check connection lines

between SDRAM & ZR966

and the SDRAM is damaged.

Check the related

circuit of ZR966.

Check the filtering and amp

circuit of TV signal.

Check the load OPEN &

CLOSE switch

B

YES

Normal

TRCLOSE & TROPEN

signal?

YES

Normal LOAD+ &

LOAD signal?

YES

Check the cable connection

between main PCBA and loader.

3-5

NO

NO

Check the Tray control IO

pins on ZR966 & AM5890S.

Check the Tray control

amplifying circuit on motor driver.

ELECTRICAL TROUBLESHOOTING GUIDE

B

Does

the SLED move

to inner side when it is

at outter position?

YES

Do not put in disc and

tray close.

Optical Lens has

movements for searching

focus?

Motor

Driver DRVSB Pin

is high?

YES

Is sled_s

DC Level higher than

1.4V?

YES

SL+ and

SL- output properly?

YES

Check the cable connection

with MECHA.

Proper

focus_s outputs to motor

driver?

YES

NONO

NO

NO

NONO

Check the connection line

of DRVSB signal.

Check the related

circuit of Sled_s.

Check the amp circuit on

motor driver.

Check focus_s connection

on ZR966 and motor dirver.

C

YES

Proper F+ &

F- outputs?

YES

Check cable connect on

with pick-up head.

3-6

NO

Check the amp circuit on

motor dirver.

ELECTRICAL TROUBLESHOOTING GUIDE

C

Laser

turns on when reading

disc?

YES

Put disc in?

YES

Disc ID is correct?

NO NO

DVD_LD,

CD_LD output properly?

YES

Collector

NO

voltage of power transistor

is OK?

YES

Check cable connection

between transistor ouput

and pick-up head.

NO

Laser off

NO

Proper RF signal

NO

on OPU

YES

Check the laser power circuit

on ZR966 and connecting to

power transistor.

Check the related circuit on

laser power transistor

Check the related circuit

on RF signal.

YES

Does spindle rotate?Does spindle rotate?

YES

D

Check DVD_LD &

CD_LD signal

NO NO

Proper spindle_s

signal on ZR966

YES

SP+ & SP- output properly?

YES

NO

Check the cable connection

between spindle and main

PCBA.

3-7

Check spindle_s related

circuit on ZR966.

Check the spindle control

amp circuit of motor driver.

ELECTRICAL TROUBLESHOOTING GUIDE

D

Focus on OK?

YES

Track on OK?

NO NO

Proper signals on

A,B,C,D of ZR966

YES

Check focus_s

NO

signal on ZR966

YES

F+ & F- output

properly?

YES

Check cable connection on

pick-up head.

NO NO

Properly track_s

signal on ZR966?

YES

Check connections between

ZR966 and pick-up head.

Check the focus_s connection

on ZR966 and motor driver.

Check the focus control

amp circuit on motor driver.

Check the track_s connection

on ZR966 and motor dirver.

YES

Disc is play?

YES

E

NO

T+ & T- output

properly?

YES

Check cable connection on

pick-up head.

Check RF signal waveform.

3-8

NO

Check the tracking control

amp circuit on motor driver.

ELECTRICAL TROUBLESHOOTING GUIDE

E

Normal

Audio output when disc

playback?

YES

Normal

IR.VFD & Front

pannel key

functions?

YES

NO

DAC received correct

Audio

NO

data stream?

YES

Normal Audio

NO

DAC out?

YES

Check Audio filter,

amplify, mute circuit.

Commu-

NO NO

nications between

IR.VFD Front pannel

key & ZR966 is

normally?

YES

Check connection between

ZR966 & Audio DAC.

Check the related

circuit of Audio DAC.

Check communication

lines on ZR966.

TEST END

Check the cable connection

on Front pannel.

3-9

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING

1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL

1) ZR966 main clock is at 27MHz (X601)

1

1

2) ZR966 reset is active high.

2

3

4

FIG 1-1

3.3VA

2

3

PWR_CTL

RESET

4

FIG 1-2

3-10

3) RS232 waveform during procedure (Downloading)

5

5

6

TXD

RXD

FIG 1-3

4) Flash R/W enable signal during download (Downloading)

7

7

PRD

6

IC602

8

PWR

8

FIG 1-4

3-11

2. SDRAM CLOCK

DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V

9

3. TRAY OPEN/CLOSE SIGNAL

IC603

9

FIG 2-1

10

11

12

13

11

INSW

OUTSW

10

IC201

CLOSE

13

OPEN

12

FIG 3-1

3-12

4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)

15

SLED_S(1.9V/1.4V/1.1V)

18

14

14

DRVSB(3.3V)

15

16

SLED+(4.2V/2.8V/1.2V)

16

17

SLED-(4.2V/2.8V/1.5V)

17

20

19

FIG 4-1

5. LENS CONTROL RELATED SIGNAL (NO DISC CONDITION)

18

19

20

FOCUS_S(1.5V/1.4V/1.3V)

FACT+(3.2V/2.7V/2.2V)
FACT-(3.2V/2.7V/2.2V)

FIG 5-1

3-13

6. LASER POWER CONTROL RELATED SIGNAL (NO DISC CONDITION)

CN201

MDI1(0V/180mV)

21

21

22

23

CD_LD(3.3V//2.3V)

22

DVD_LD(3.3V/2.3V)

23

FIG 6-1

7. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)

SPINDLE_S(1.4V/1.8V)

24

25

SP-(3.6V/2.4V)

26

SP+(3.6V/4.8V)

FIG 7-1

3-14

24

25

26

8. FOCUS ON WAVEFORM

27

28

29

27

FOCUS_S

FF+

FF-

IC201

27

FIG 8-1 (DVD)

28

FOCUS_S

29

28

29

FF+

FF-

FIG 8-2 (CD)

3-15

9. RACKING CONTROL RELATED SIGNAL (SYSTEM CHECKING)

TRACK_S

30

30

31

32

30

Tracking+

Tracking-

FIG 9-1 (DVD)

TRACK_S

P2201

31

31

32

Tracking+
Tracking-

FIG 9-2 (CD)

3-16

32

10. ZR966 AUDIO COAXIAL OUTPUT (SPDIF)

33

FIG 10-1

33

11. ZR966 VIDEO OUTPUT WAVEFORM

1) 100% COLOR BAR

FIG 11-1

3-17

2) COMPOSITE VIDEO SIGNAL

FIG 11-2

12. AUDIO OUTPUT FROM ZR966

FIG 12-1

3-18

CONNECTOR PICTURE

1. ALL CONNECTOR PICTURE

3-19

2. P2201 CONNECTOR PICTURE

P2201 (MD 23PIN)

3. P2202 CONNECTOR PICTURE

P2202 (MD 9PIN)

3-20

4. PW6101 CONNECTOR PICTURE

PW6101 (POWER 10PIN)

5. P6501 CONNECTOR PICTURE

P6501 (USB 4PIN) Not used currently

3-21

6. P6602 CONNECTOR PICTURE

P6602 (DOWN LOAD 4PIN)

P6602 (HYPER TEAMINAL 4PIN)

7. P6901 CONNECTOR PICTURE

P6901 (TIMER 12PIN)

3-22

8. P7301 CONNECTOR PICTURE

P7301 (SCART 12PIN)

3-23

BLOCK DIAGRAMS

1. OVERALL BLOCK DIAGRAM

3-24

2. POWER SUPPLY BLOCK DIAGRAM

3-25

3. SERVO BLOCK DIAGRAM

3-26

4. MPEG & MEMORY BLOCK DIAGRAM

3-27

5. VIDEO BLOCK DIAGRAM

3-28

6. AUDIO BLOCK DIAGRAM

3-29

MEMO

3-30

No Power
D105~D108 are Defective

12V No Power
Q123 is Defective

5V No Power
Q126 is Defective

Switching Error
IC102, IC103 are Defective

No Power
FR101 is Defective

Switching Error
IC101 is Defective

3.3V No Power
Q121 is Defective

CIRCUIT DIAGRAMS

1. POWER (SMPS) CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTE :

WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITHOUT PERMISSION
FROM THE JVC. ALL COMPONENTS SHOULD BE
REPLACED ONLY WITH TYPES IDENTICAL TO
THOSE IN THE ORIGINAL CIRCUIT. SPECIAL
COMPONENTS ARE SHADED ON THE SCHEMATIC

FOR EASY IDENTIFICATION. THIS CIRCUIT DIAGRAM
MAY OCCASIONALLY DIFFER FROM THE ACTUAL
CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE
LATEST SAFETY AND PERFORMANCE
IMPROVEMENT CHANGES INTO THE SET IS NOT
DELAYED UNTIL THE NEW SERVICE LITERATURE IS
PRINTED.

1. Shaded( ) parts are critical for safety. Replace only
with specified part number.

2. Voltages are DC-measured with a digital voltmeter
during Play mode.

3-31 3-32

2. SYSTEM (MPEG) CIRCUIT DIAGRAM

3-33 3-34

3. SERVO CIRCUIT DIAGRAM

3-35 3-36

4. AV/JACK CIRCUIT DIAGRAM

3-37 3-38

5. TIMER/KEY CIRCUIT DIAGRAM

3-39 3-40

• CIRCUIT VOLTAGE CHART

PIN No Disc Play

IC201

1 1.33 1.66
2 1.84 1.83
3 2.76 3
4 1.28 1.65
5 1.25 1.24
6 3.28 3.24
7 0.0003 0.0003
8 4.89 4.97

9 0.53 0.435
10 3.83 3.99
11 2.29 2.47
12 2.29 2.45
13 2.34 2.27
14 2.34 2.54
15 2.32 2.4
16 2.32 2.41
17 1.34 3.32
18 1.34 1.49
19 4.87 4.97
20 0.92 1.03
21 4.87 4.99
22 0.0007 0.001
23 1.01 1.94
24 0.435 0.4
25 4.81 4.93
26 1.35 1.64
27 1.65 1.64
28 0.004 3.17

IC601

1 1.91 1.97

2 1.56 2.109

3 1.32 2.117

4 2.61 2.328

5 0.64 1.51

6 1.32 1.46

7 1.51 1.61

8 1.64 1.08

9 0.97 2.31
10 0.72 1.49
11 0.0002 0.0003
12 1.71 1.13
13 1.77 1.966
14 1.756 0.278
15 3.28 0.281
16 0.23 0.36
17 3.28 0.297
18 3.23 0.293
19 3.21 0.279
20 0.03 1.09
21 2.45 2.21
22 0.78 1.04
23 1.45 1.75
24 1.18 1.68
25 1.6 1.72
26 3.28 3.25
27 0.001 0.36
28 1.61 2.35
29 1.13 1.03

PIN No Disc Play

30 3.28 1.51
31 0.0001 0.001
32 1.83 2.15
33 0.31 1.83
34 0.72 0.32
35 3.28 0.35
36 0.87 0.62
37 2.56 0.24
38 0.002 0.31
39 3.28 0.3
40 0.003 0.31
41 0.004 0.31
42 0.003 0.003
43 1.67 0.24
44 1.86 0.25
45 1.69 0.28
46 3.28 3.25
47 0.0001 0.0001
48 0.92 1.31
49 1.63 1.57
50 1.57 1.68
51 1.62 1.57
52 1.75 1.74
53 1.58 1.21
54 0.015 0.015
55 0.003 0.007
56 3.28 3.28
57 0.0001 0.0001
58 0.004 3.28
59 0.004 0.005
60 3.24 3.21
61 0.035 0.035
62 3.2 3.16
63 3.2 3.23
64 3.26 3.18
65 3.28 3.28
66 0.0001 0.0001
67 3.22 3.24
68 2.9 2.83
69 0.0001 0.0004
70 3.25 0.26
71 3.29 3.24
72 1.51 0.07
73 0.04 1.24
74 1.87 1.67
75 2.68 1.54
76 3.28 3.249
77 0.0001 0.0001
78 1.56 1.22
79 1.87 1.64
80 1.51 1.61
81 1.69 2.13
82 1.78 0.07
83 1.49 1.52
84 3.32 3.247
85 0.001 0.001
86 0.67 0.98
87 1.86 1.13
88 3.32 1.742

PIN No Disc Play

89 1.61 0.93
90 1.59 1.91
91 1.15 1.87
92 1.42 1.93
93 3.32 3.249
94 0.002 3.24
95 0.0005 0.0005
96 0.45 0.51
97 0.002 0.003
98 0 0.0001

99 0 0.0001
100 0.0001 0.001
101 3.28 3.24
102 0.0005 0.001
103 0.001 0.001
104 3.26 3.21
105 3.281 3.246
106 0.001 0.0008
107 0.0005 0.0009
108 0.0008 0.0008
109 0.0006 0.0006

110 0.0001 0.0002
111 0.0005 0.0006
112 0.0005 0.0006
113 1.642 1.62
114 1.642 1.62
115 1.642 1.62
116 1.642 1.62
117 0.0005 0.0005
118 0.0001 0.0009
119 0.0008 0.0007
120 0.005 0.005
121 3.286 3.247
122 1.635 1.617
123 0.005 0.005
124 0.047 0.053
125 0.005 0.005
126 0.005 0.005
127 0.005 0.005
128 3.27 3.22
129 4.31 4.18
130 3.82 3.72
131 0.013 0.015
132 0.005 0.005
133 3.62 3.32
134 3.295 3.72
135 3.286 3.252
136 3.284 3.22
137 3.281 3.25
138 3.284 3.25
139 3.281 3.25
140 1.75 1.747
141 0.0003 0.0003
142 3.286 3.248
143 0.0003 0.0005
144 1.751 1.745
145 1.59 1.57
146 1.63 1.61
147 1.35 1.57

PIN No Disc Play

148 0.0002 0.0005
149 0.0003 0.0005
150 3.279 3.24
151 0.93 1.166
152 0.0001 0.0003
153 3.278 3.242
154 0.0002 0.0003
155 1.233 1.235
156 0.0002 0.0003
157 0.0003 1.67
158 0.0003 1.67
159 3.29 3.23
160 0.69 2.26
161 0.21 2.24
162 3.29 3.24
163 0.22 2.254
164 0.68 2.257
165 1.75 1.75
166 0.81 2.37
167 0.436 0.397
168 0.812 2.36
169 0.0001 0.003
170 0.256 1.726
171 1.598 1.694
172 0.0001 0.003
173 0.806 2.097
174 0.001 1.647
175 0.002 0.93
176 0.0001 0.003
177 3.29 3.24
178 0.0001 0.199
179 0.0001 0.006
180 3.29 2.36
181 3.29 3.22
182 0.0001 1.733
183 3.29 3.25
184 0.0015 1.612
185 0.0001 0.0002
186 0.0029 2.484
187 0.0018 1.697
188 3.28 3.24
189 0.0003 0.0005
190 1.754 1.749
191 0.0002 0.0003
192 0.003 0.003
193 3.37 3.37
194 0.0003 0.0003
195 3.27 0.0003
196 0.029 0.067
197 3.19 3.21
198 3.09 3.08
199 0.003 0.003
200 3.29 3.262
201 1.88 2.49
202 3.22 2.87
203 3.23 2.81
204 1.52 2.65
205 1.65 2.6
206 1.68 2.75

PIN No Disc Play

207 1.61 2.47
208 3.28 3.25

IC603

1 3.31 3.3
2 1.42 1.93
3 3.31 3.3
4 1.59 1.91
5 1.86 1.13
6 0.0002 0.0003
7 1.49 1.52
8 1.69 2.13

9 3.31 3.3
10 1.87 1.64
11 2.68 1.54
12 0.0001 0.0002
13 0.04 1.24
14 3.31 3.3
15 2.9 2.83
16 3.22 3.24
17 3.26 3.18
18 3.2 3.23
19 3.2 3.16
20 0.035 0.035
21 3.24 3.21
22 0.003 0.008
23 1.5 1.28
24 1.51 1.71
25 0.95 1.31
26 1.87 1.6
27 3.31 3.3
28 0.0002 0.0003
29 1.66 1.6
30 1.7 1.61
31 1.6 1.58
32 1.62 1.58
33 0.016 0.013
34 0.004 0.021
35 0.003 0.004
36 0.0002 0.005
37 0.45 0.51
28 0.227 0.24
39 2.9 2.82
40 0.004 0.004
41 0.0001 0.005
42 1.51 0.07
43 3.31 3.29
44 1.87 1.67
45 1.56 1.22
46 0.0002 0.0001
47 1.51 1.61
48 1.78 0.07
49 3.31 3.29
50 0.67 0.98
51 1.61 0.93
52 0.0002 0.0003
53 1.15 1.87
54 0.0002 0.0003

IC604

1 3.21 2.56

PIN No Disc Play

2 3.22 2.16
3 0.16 0.97
4 2.48 2.31
5 0.85 1.05
6 1.8 1.71
7 1.25 1.75
8 1.32 1.65

9 0.001 0.002
10 3.28 3.28
11 3.28 3.28
12 3.31 3.29
13 3.31 3.29
14 3.31 3.29
15 1.76 1.71
16 0.001 0.31
17 1.88 2.49
18 1.32 1.13
19 1.8 1.53
20 1.8 1.68
21 0.28 1.78
22 0.8 1.59
23 0.95 1.56
24 2.75 2.93
25 3.19 2.93
26 3.23 2.79
27 0.002 0.0005
28 3.23 2.81
29 1.52 2.65
30 1.65 2.6
31 1.68 2.75
32 1.61 2.47
33 1.68 2.59
34 1.55 2.57
35 1.65 2.67
36 2.79 2.69
37 3.3 3.29
38 0.53 1.91
39 1.37 2.03
40 1.37 2.31
41 1.76 0.81
42 0.91 2.21
43 0.76 2.4
44 1.71 1.95
45 1.91 1.59
46 0.017 0.005
47 3.3 3.29
48 0.15 0.51

IC702

1 7.21 7.32

2 4.3 4.34

3 4.29 4.32

4 0.002 0.004

5 4.28 4.31

6 4.29 4.32

7 7.24 7.32

811.84 11.98

DC VOLTMETER MEASUREMENT METHOD

condenser Capacitor Compressive(V)

C617 100uF 16V 3.25 0.00
C623 100uF 16V 1.75 0.00
C624 100uF 16V 3.25 0.00
C627 220uF 6.3V 3.242 0.00
C640 100uF 16V NC NC
C644 47uF 6.3V 3.25 0.00
C646 47uF 6.3V 1.76 0.00
C649 47uF 6.3V 3.30 0.00
C661 10uF 16V 3.25 0.00
C678 33uF 16V 2.42 0.00
C155 220uF 16 12.01 3.99V
C156 330uF 10 4.98 5.02V
C6C9 220uF 6.3V 3.29 0.00
C201 100uF 16V 4.94 0.00
C208 47uF 6.3V 3.29 3.23
C209 47uF 6.3V 3.29 2.41
C214 470uF 6.3V 4.94 0.00
C221 47uF 16V NC NC
C223 47uF 6.3V 3.29 0.00
C716 22uF 16V 6.63 0.00
C717 22uF 16V 6.66 0.00
C727 22uF 16V 0.37 0.00
C728 470uF 16V 11.98 0.00
C729 220uF 16V NC NC
C741 47uF 6.3V NC NC
C787 47uF 6.3V 0.17 0.00

TR

Q201 3.29 0.05 3.23
Q202 3.11 2.04 2.41
Q203 2.50 1.78 1.85
Q701 0.00 0.00 2.41
Q702 0.00 0.00 3.25

Q703 3.24 -2.73 3.31

Q711 0.00 0.00 0.07
Q712 0.00 0.00 0.07
Q713 0.00 0.00 0.07
Q714 3.02 4.96 0.07

E/S C/D B/G

PLAY

Playback

+/A -/K

3-41 3-42

PRINTED CIRCUIT BOARD DIAGRAMS

1. MAIN P.C.BOARD

(TOP VIEW) (BOTTOM VIEW)

3-43 3-44

2. KEY P.C.BOARD

(TOP VIEW) (BOTTOM VIEW)

3. TIMER P.C.BOARD

(TOP VIEW)

(BOTTOM VIEW)

3-45 3-46

4. SMPS P.C.BOARD

5. SCART P.C.BOARD (SCART MODEL ONLY)

(TOP VIEW) (BOTTOM VIEW)

3-47 3-48

MEMO MEMO

3-49 3-50

4-1

SECTION 4

MECHANISM (DP-11)

CONTENTS

DECK MECHANISM PARTS LOCATIONS

• TOP VIEW....................................................................................................................................4-2

• TOP VIEW (WITHOUT TRAY DISC) ...........................................................................................4-2

• BOTTOM VIEW ...........................................................................................................................4-2

DECK MECHANISM DISASSEMBLY

1. MAIN BASE ...............................................................................................................................4-3

1-1. Clamp Assembly Disc .........................................................................................................4-3

1-1-1. Plate Clamp ..............................................................................................................4-3

1-1-2. Magnet Clamp ..........................................................................................................4-3

1-1-3. Clamp Upper ............................................................................................................4-3

2. TRAY DISC ................................................................................................................................4-3

3. BASE ASSEMBLY SLED ..........................................................................................................4-4

3-1. Gear Feed...........................................................................................................................4-4

3-2. Gear Middle ........................................................................................................................4-4

3-3. Gear Rack...........................................................................................................................4-4

4. RUBBER REAR.........................................................................................................................4-4

5. FRAME ASSEMBLY UP/DOWN................................................................................................4-5

6. BELT LOADING.........................................................................................................................4-5

7. GEAR PULLEY..........................................................................................................................4-5

8. GEAR LOADING .......................................................................................................................4-5

9. GUIDE UP/DOWN .....................................................................................................................4-5

10. PWB ASSEMBLY LOADING...................................................................................................4-5

11. BASE MAIN .............................................................................................................................4-5

EXPLODED VIEW

1. DECK MECHANISM EXPLODED VIEW...................................................................................4-7

4-2

DECK MECHANISM PARTS LOCATION

• TOP VIEW (WITHOUT TRAY)

Procedure

Parts Fixing Type

Disass Fig-

Starting No.

embly ure

1 Main Base 4-1

12

Clamp Assembly

4-1

Disc

1, 2 3 Plate Clamp 4-1

1, 2, 3 4 Magnet Clamp 4-1

1, 2, 3, 4 5 Clamp Upper 4-1

16Tray Disc 4-2

1, 6 7 Base Assembly Sled 4-3

4 Screws,

1, 2, 6 8 Gear Feed 1 Connector 4-3

1 Locking Tabs

1, 2, 6, 8 9 Gear Middle

1, 2, 6, 8,

10 Gear Rack 1 Screw 4-3

9

1, 2, 7 11 Rubber Rear 4-3

1, 2, 7 12

Frame Assembly

1 Screw Bottom 4-4

Up/Down

1, 2 13 Belt Loading 1 Locking Tab 4-4

1, 2 ,13 14 Gear Pulley 4-4

1, 2, 13, 14 15 Gear Loading 1 Locking Tab 4-4

1, 2, 7, 12,

16 Guide Up/Down 4-4

13, 14

1, 2, 13 17 PWB Assembly

1 Locking Tab

Bottom 4-4

Loading

1 Hook
2Screw

1, 2, 7, 12,
13, 14, 15, 18 Base Main 2 Locking Tabs 4-4
16, 17

• TOP VIEW (WITH TRAY)

• BOTTOM VIEW

Note

When reassembling, perform the procedure in
reverse order.
The “Bottom” on Disassembly column of above
Table indicates the part should be disassembled
at the Bottom side.

4-3

1. MAIN BASE (FIG. 4-1)

1-1. Clamp Assembly Disc

1) Place the Clamp Assembly Disc as Fig. (A)

2) Lift up the Clamp Assembly Disc in direction of
arrow(A).

3) Separate the Clamp Assembly Disc from the
Holder Clamp.

1-1-1. Plate Clamp

1) Turn the Plate Clamp to counterclockwise
direction and then lift up the Plate Clamp.

1-1-2. Magnet Clamp
1-1-3. Clamp Upper

2. TRAY DISC (FIG. 4-2)

1) Insert and push a Driver in the emergency eject
hole(A) at the right side, or put the Driver on the
Lever(B) of the Gear Emergency and pull the
Lever(B) in direction of arrow so that the Tray
Disc is ejected about 15~20mm.

2) Pull the Tray Disc until it is separated from the
Base Main completely.

DECK MECHANISM DISASSEMBLY

FIG. 4-1 FIG. 4-2

4-4

3. BASE ASSEMBLY SLED (FIG. 4-3)

1) Release 4 Screw (S2).

2) Disconnect the FFC Connector (C1)

3-1. Gear Feed
3-2. Gear Middle

3-3. Gear Rack

1) Release the Scerw (S3)

4. RUBBER REAR (FIG. 4-3)

FIG. 4-3

4-5

5. FRAME ASSEMBLY UP/DOWN (FIG. 4-4)

Note

Put the Base Main face down (Bottom Side)

1) Release the screw (S4)

2) Unlock the Locking Tab (L3) in direction of arrow
and then lift up the Frame Assembly Up/Down to
separate it from the Base Main.

Note

• When reassembling move the Guide Up/Down in
direction of arrow(C) until it is positioned as
Fig.(C).

• When reassembling insert (A) portion of the
Frame Assembly Up/Down in the (B) portion of
the Guide Up/Down as Fig.(B)

6. BELT LOADING(FIG. 4-4)

Note

Put the Base Main on original position(Top Side)

7. GEAR PULLEY (FIG. 4-4)

1) Unlock the Locking Tab(L4) in direction of

arrow(B) and then separate the Gear Pulley from
the Base Main

8. GEAR LOADING (FIG. 4-4)

9. GUIDE UP/DOWN (FIG. 4-4)

1) Move the Guide Up/Down in direction of
arrow(A) as Fig.(A)

2) Push the Locking Tab(L5) down and then lift up
the Guide Up/Down to separate it from the Base
Main.

Note

When reassembling place the Guide Up/Down as
Fig.(C) and move it in direction arrow(B) until it is
locked by the Locking Tab(L5). And confirm the Guide
Up/Down as Fig.(A)

10. PWB ASSEMBLY LOADING (FIG. 4-4)

Note

Put the Base Main face down(Bottom Side)

1) Release 1 Screws(S5)

2) Unlock the Loading Motor (C2) from the Hook
(H1) on the Base Main.

3) Unlock 2 Locking Tabs(L6) and separate the
PWB Assembly Loading from the Base Main.

11. BASE MAIN (FIG. 4-4)

FIG. 4-4

4-6

MEMO

001

002

003

020

439

018

013

017

015B

015A

440

019

012

015

012

432

030

010

439

431

435

021

430

024

025

036

012A

012A

026

016

435

014

A01

A02

A03

A00

4-7 4-8

EXPLODED VIEW

1. DECK MECHANISM EXPLODED VIEW
DP-11

4-9 4-10

MEMO MEMO