Nad T-515-C Service Manual

SERVICE MANUAL

T515C/

T515CT

MODELS : T515C/T515CTSERVICE MANUAL

NAD ELECTRONICS INTERNATIONAL TORONTO

T515C/T515CT

DVD VIDEO PLAYER

T515C/T515CT

DVD VIDEO PLAYER

CONTENTS

SECTION 1 SUMMARY

SECTION 3 ELECTRICAL

SECTION 2 CABINET & MAIN CHASSIS

SECTION 4a REPLACEMENT PARTS LIST C

SECTION 4b REPLACEMENT PARTS LIST CT

SECTION 1 . . . .SUMMARY

SECTION 2 . . . .CABINET & MAIN CHASSIS

SECTION 3 . . . .ELECTRICAL

SECTION 4a . . . .REPLACEMENT PARTS LIST C

SECTION 4b . . . .REPLACEMENT PARTS LIST CT

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

........................... 1-3

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

• General Servicing Precautions

• Insulation Checking Prodedure

• Electrostatically Sensitive Devices

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

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

1-2

1-3

CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILLNOT ONLY VOID THE WARRANTY, BUTMAYLEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTYDAMAGE OR USER INJURY.

SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER.

WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM A.C. LINE SHOCK.

SAFETY CHECKS

AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRCTED. A CHECK SHOULD BE MADE OF THE FOLLOWING.

SUBJECT : FIRE & SHOCK HAZARD

1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH AWAY AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANSPORTED TO AND FROM THE REPAIR SHOP.

2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.

3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD SOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.

4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION TO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGED INSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARY FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.

5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PROTRUNING METALSURFACES MUST BE AVOIDED.

6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS.

7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C. LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HANDLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. 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. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.

SUBJECT: GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG- NITUDE TO CONSTITUTE ARISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

SUBJECT : X-RADIATION

1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIRCUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIRABLE LEVELS.

2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BE USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS, ALWAYS RE-INSTALLTHEM.

3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA TION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE ATYOUR DISTRIBUTOR.

4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING CORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCEDURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ON EACH CUSTOMER’S INVOICE.

5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCES SIVE VOLTAGE.

6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED).

SUBJECT: IMPLOSION

1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF SCRATCHED REPLACE IT.

2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.

SUBJECT : TIPS ON PROPER INSTALLATION

1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TO 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 AFACTOR, ETC.

3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH 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 TEST ON CUSTOMIZED INSTALLATIONS.

5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED.

6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLLA CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS.

7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.’S OF THE SAME OR LARGER SCREEN SIZE.

8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THATAFOREST OF EXTENSIONS SPROUTING FROM ASINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY.

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

A.C. VOLTMETER

GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC

PLACE THIS PROBE ON EACH EXPOSED METALPART

1-4

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 publications, always follow the safety precautions.

Remembers 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) Disconnection or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an elec-

trolytic 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 whitch 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 cerrectly installed.

6. Always connect test instrument ground lead to the appropriate ground before connection 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 including 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 grouned-tip soldering iron to solder or unsolder ES devices.

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

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

6. Do not remove a replacement ES device from its protec tive 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.)

1-5

SERVICE INFORMATION FOR EEPROM

POWER ON

DVD LOGO Status (NO Disk status)

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

Press number 0~9, Press charater A~F (1~6 for a while)

Use arrow key ( ) to move to approprite position and make changes

Press pause key once

Change will be applied when power

OFF-->ON.

NAME HEX

OPT 1 55 OPT 2 53 OPT 3 00

OPT 4 D3

OPT 5 03 OPT 6 55 OPT 7 F4 OPT 8 00

DETECT NEW EEPROM (OPTION EDIT SCREEN)

1-6

SPECIFICATIONS

• GENERAL

Power requirements Power requirements: AC 120 V, 60 Hz

NTSC Region 1, 200-240 50/60 Hz PAL Region 2 Power consumption 10 W Dimensions (approx.) 435 x 45 x 250 mm (W x H x D) with feet and RCA plugs Weight (approx.) 2 kg (4.4 lb) Operating temperature 5 °C to 35 °C (41 °F to 95 °F) Operating humidity 5 % to 90 %

• SYSTEM

Laser Semiconductor laser, wavelength 650 nm Signal system NTSC for 120V North American version,

NTSC/PAL for 230V European version

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

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

CD: 8 Hz to 20 kHz

Signal-to-noise ratio More than 100 dB (ANALOG OUT connectors only) Harmonic distortion Less than 0.008% Dynamic range More than 90 dB (DVD/CD)

• OUTPUTS

VIDEO OUT 1 Vp-p 75 Ω, sync negative, RCA jack x 1 S-VIDEO OUT (Y) 1.0 V (p-p), 75 Ω, negative sync,

Mini DIN 4-pin x 1 (North American version only)

(Cb/Pb)/(Cr/Pr) 0.7 V (p-p), 75 Ω, RCA jack x 2 AUDIO OUT 2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) x 2 DIGITAL OUT (COAXIAL) 0.5 V (p-p), 75 Ω, RCA jack x 1 DIGITAL OUT (OPTICAL) 3 V (p-p), 75 Ω, Optical Connector x 1 DIGITAL OUT (HDMI) 2-channel 48 kHz PCM/Bitstream HDMI VIDEO OUT HDCP 480p (NTSC)

HDCP 576p (PAL)

2-12-1

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

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

1. Cabinet and Main Frame Section...........................................................................................2-2

2. Deck Mechanism Section(DP-10)...........................................................................................2-3

3. Packing Accessory Section ....................................................................................................2-4

2-2

EXPLODED VIEWS

1. Cabinet and Main Frame Section

BCD

463

NOTES) THE EXCLAMATION POINT WITHIN AN

EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

463

300

250

463

A00

463

467

A46

465

320

OPTIONAL PART

A44

260

465

463

261

P101

463

5.1CH, JACK

A47

A48

A43

452

A42

280

CABLE90

A49

452

CN902

283

261

2-3

2. DECK MECHANISM SECTION(DP-10)

A00

012

A02

017

013

015

019

439

435

018

015B

015A

014

440

001

002

A01

003

020

016

012A

432

026

A03

012

036

024

025

030

010

439

431

435

012A

021

430

2-4

3. PACKING ACCESSORY SECTION

BATTERY

808

PACKING SHEET

804

PACKING

OPTIONAL PARTS

803

806

820

OWNER’S MANUAL

RF CABLE

810

CABLE SET ASS’Y

801

REMOCON

900

BOX CARTON

802

PACKING

803

811

812

PLUG ASS’Y 1WAY(YELLOW)

PLUG ASS’Y 1WAY(BLACK)

PLUG ASS’Y 2WAY

DISC

832

3-1

SECTION 3

ELECTRICAL

CONTENTS

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

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

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

3. TEST & DEBUG FLOW ............................................................................................................3-4

4. KARAOKE FLOW (KARAOKE MODEL ONLY).....................................................................3-10

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ....................3-11

1. SYSTEM 27MHZ CLOCK, RESET SIGNAL. ..........................................................................3-11

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

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

4. SLED CONTROL RELATED SIGNAL(NO DISC CONDITION).............................................3-14

5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION).............................................3-14

6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)............................3-15

7. DISC TYPE JUDGEMENT WAVEFORM................................................................................3-15

8. FOCUS ON WAVEFORM........................................................................................................3-17

9. SPINDLE CONTROL WAVEFORM(NO DISC CONDITION...................................................3-18

10. TRACKING CONTROL RELATED SIGNAL(SYSTEM CHECKING)...................................3-19

11. RF WAVEFORM....................................................................................................................3-20

12. ZR36888 AUDIO OPTICAL AND COAXIAL OUTPUT(SPDIF)............................................3-20

13. ZR36888 VIDEO OUTPUT WAVEFORM..............................................................................3-21

14. AUDIO OUTPUT FROM AUDIO DAC ..................................................................................3-22

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

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

2. POWER(SMPS) BLOCK DIAGRAM.......................................................................................3-25

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

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

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

CIRCUIT DIAGRAMS................................................................................................................3-29

1. POWER(SMPS) CIRCUIT DIAGRAM .....................................................................................3-29

2. SYSTEM(MAIN) CIRCUIT DIAGRAM.....................................................................................3-31

3. SERVO CIRCUIT DIAGRAM ..................................................................................................3-33

4. AV/JACKCIRCUIT DIAGRAM.................................................................................................3-35

5. MEMORY CARD CIRCUIT DIAGRAM ...................................................................................3-37

6. TIMER CIRCUIT DIAGRAM ....................................................................................................3-39

7. KARAOKE CIRCUIT DIAGRAM (KARAOKE MODEL ONLY)..............................................3-41

• CIRCUIT VOLTAGE CHART ....................................................................................................3-43

PRINTED CIRCUIT DIAGRAMS............................................................................................3-45

1. MAIN P.C.BOARD...................................................................................................................3-45

2. KEY P.C.BOARD .....................................................................................................................3-47

3. TIMER P.C.BOARD.................................................................................................................3-48

4. SCART P.C.BOARD ............................................................................................................. ...3-49

5. SMPS P.C.BOARD..................................................................................................................3-50

6. KARAOKE P.C.BOARD(KARAOKE MODEL ONLY)(6, 7, 9 TOOL).....................................3-51

3-2

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER CHECK FLOW

No 3.4VA.

No 3.4VA

Is 3.4VA section working?

Is 3.4V present at emitter of Q121?

Replace Q121.

Replace IC101.

Is there a DC voltage at Cathode of D105 or D107?

Check FR101

No 5V

Is 3.4VA section working?

Replace Q126.

Is 5.6V present at collector of Q126?

YES

Check D105/D106/D107/ D108 and replace.

YES

A. B.

3-3

2. SYSTEM OPERATION FLOW

YES

Power On

1. 186 CPU initializes SERVO,DSP & RISC registers

2. Write RISC code to SDRAM

3. Reset RISC

Show LOGO

Tray Closed ?

Tray Close to Closed position

SLED at Inner Side ?

SLED Moves to Inner Position

1. Judge whether have disc and disc type

2. Jump to related disc reading procedure

Recieve OPEN/CLOSE Key?

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?

3-4

3. TEST & DEBUG FLOW

TEST

Check the AC Voltage

Power PCBA(110V or 220V)

YES

Switch on the Power PCBA

YES

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 outputs normal on main PCBA?

YES

Connect to PC RS232 Cable and update the FLASH memory code.

YES

Update FLASH successfully?

YES

Replace power PCBA or AC transformer.

Repair or Replace Power PCBA

Check the regulators or related diodes.

Is 1.8V Voltage normal for Zoran IC

YES

1. Check Q203. 2. Check D201.

3. Check IC102

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.

3-5

YES YES

YES

RESET or Power On.

Flash Memory operates properly?

Show LOGO?

Does Tray move inside when it is not at closed position?

Check connection lines between FLASH & ZR336888 and the FLASH access time whether is suitable or not.

SDRAM works properly?

Check connection lines between SDRAM & ZR36888 and the SDRAM is damaged.

ZR36882 VIDEO outputs properly?

Check the related circuit of ZR36888

Have TV signal output?

Check AV cable connection to TV set.

Normal OUTSW & INSW signals?

Check the filtering and amp circuit of TV signal.

Check the load OPEN & CLOSE switch

Normal OPEN & CLOSE signal?

Check the Tray control IO pins on ZR36888 & AM5869S

Normal LOAD+ & LOAD signal?

Check the cable connection between main PCBA and loader.

Check the Tray control amplifying circuit on Motor driver.

3-6

Motor Driver MUTE Pin is High?

Does the SLED move to inner side when it is at outter position?

Do not put in disc and tray close.

Optical Lens has movements for searching Focus?

YES

Check the connection line of MUTE signal.

Is SLED_S DC Level higher than 1.65V?

Check the related circuit of FMSO.

SLED+ and SLED- output properly?

YES

Check the amp circuit on motor driver.

Check FOCUS_S connection On ZR36888 and motor dirver.

Check the cable connection with MECHA.

Proper FOCUS_S outputs to motor driver?

Proper FACT+ & FACT outputs?

Check the amp circuit on motor dirver.

Check cable connect on with pick-up head.

3-7

LD_DVD or LD_CD output properly?

Laser turns on when reading disc?

Put disc in?

Disc ID is correct?

Does spindle rotate?

YES

Check the laser power circuit on ZR36888 and connecting to power transistor.

Collector voltage of power transistor is OK?

Check the related circuit on laser power transistor

Check cable connection between transistor ouput and pick-up head.

YES

Check the related circuit on ZR36888 RFL signal.

Check SPINDLE_S related circuit on ZR36888.

Check the spindle control amp circuit of motor driver.

Laser off

Proper RF signal on ZR36888?

Check LD_DVD & LD_CD signal

Proper SPINDLE_S signal on ZR36888

SP+ & SP- output properly?

Check the cable connection between spindle and main PCBA.

3-8

Proper signals on A,B,C,D of ZR36888

Focus ON OK?

Track On OK?

Disc is play ?

YES

Check connections between ZR36888 and pick-up head.

Check FE signal on ZR36888

YES

Check the FOCUS_S connection on ZR36888 and motor driver.

Check FOCUS_S signal on ZR36888

YES

Check the TRACK_S connection on ZR36888 and motor dirver.

Check the tracking control amp circuit on motor driver.

Normal TE Signal on ZR36888?

Check the related circuit on ZR36888

Properly TRACK_S signal on ZR36888?

TACT+ & TACT- output properly?

Check cable connection on pick-up head.

Check RF signal waveform.

3-9

Audio DAC received correct data stream?

Normal Audio output when disc playback?

Normal IR.VFD & Front panel key functions?

TEST END

YES

Check connection between ZR36888 & Audio DAC.

Normal Audio DAC out?

YES

Check the related circuit of Audio DAC.

Check Audio filter, amplify, mute circuit.

Communications between IR.VFD Front panel key & ZR36888 is normally?

Check communication lines on ZR36888

Check the cable connection on Front panel.

3-10

4. KARAOKE Flow (KARAOKE MODEL ONLY)

Is the Mic signal at the

IC801 pin3.

Is the Mic signal at the

IC801 Pin 2.

Is the Mic signal at the

IC801 Pins3, 7 normal?

Does the Mic

signal input the IC601

Pin224.

Replace IC601.

Check pattern.

Replace the VR801.

Replace IC801.

Replace the mic jack

Start

Insert the Mic jack

YES

3-11

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING

1. SYSTEM 27MHz CLOCK, RESET SIGNAL

1) ZR36882 main clock is at 27MH(X601)

FIG 1-1

3.1V,27MHz

2) ZR3682 reset is low active

FIG 1-2

Reset Time

3.3VA

PWR_CTL RESET

3-12

2. SDRAM CLOCK

1) SDRAM clock is at 143MHz

FIG 2-1

IC603 PIN38

CLK=143MHz,Vp-p=3.3V

3. TRAY OPEN/CLOSE SIGNAL

1) Tray open/close waveform

FIG 3-1

OPEN

OPEN CLOSE

LM-

LM+

+ 52 hidden pages