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

AFN

CH,

E MANUA

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

462

460

250

462

A44

300

A26

283

261

260

262

320

467

465

261

462

A48

A46

P101

A47

MAIN

SMPS

5.1CH

SCART

452

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

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 3.3VA

Is there a DC voltage at

cathode of D105 or D107?

Is 3.3VA

section working?

YES

Is 3.3V

present at emitter

of Q121?

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 ?

SLED at inner side ?

YES

1. Execute pressed Key & IR key

2. System operation routine loop

1. Stop playback & open Tray

2. Display tray open message & LOGO

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

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

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

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

works properly?

YES

ZR966

VIDEO outputs

properly?

YES

Have TV

signal output?

YES

Check AV cable

connection to TV set.

Normal

TROUT & TRIN

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

YES

Normal

TRCLOSE & TROPEN

signal?

YES

Normal LOAD+ &

LOAD signal?

YES

Check the cable connection

between main PCBA and loader.

3-5

Check the Tray control IO

pins on ZR966 & AM5890S.

Check the Tray control

amplifying circuit on motor driver.

ELECTRICAL TROUBLESHOOTING GUIDE

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

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.

YES

Proper F+ &

F- outputs?

YES

Check cable connect on

with pick-up head.

3-6

Check the amp circuit on

motor dirver.

ELECTRICAL TROUBLESHOOTING GUIDE

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

voltage of power transistor

is OK?

YES

Check cable connection

between transistor ouput

and pick-up head.

Laser off

Proper RF signal

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

Check DVD_LD &

CD_LD signal

NO NO

Proper spindle_s

signal on ZR966

YES

SP+ & SP- output properly?

YES

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.

+ 41 hidden pages

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

Specifications and Main Features

Frequently Asked Questions

User Manual