LG LDA-511 Service manual

DVD VIDEO PLAYER
SERVICE MANUAL
MODEL : DF599X(DF9912EH)
MODEL : DF599X(DF9912EH)SERVICE MANUAL
P/NO : 3829RHP040R MARCH,2005
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL.
CONTENTS
SECTION 1 . . . .SUMMARY
SECTION 2 . . . .CABINET & MAIN CHASSIS
SECTION 3 . . . .ELECTRICAL
SECTION 4 . . . .REPLACEMENT PARTS LIST
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
SPECIFICATIONS ...................................................................................................................... 1-5
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 WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTING PROPERTY DAMAGE 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 A WAY 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 METAL SURFACES 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 MAG­NITUDE TO CONSTITUTE A RISK 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-INSTALL THEM.
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 AT YOUR 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 A FACTOR, 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 ROLL A 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 THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN­GLE 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 METAL PART
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
SPECIFICATIONS
• GENERAL
Power requirements: AC 110-240 V , 50/60 Hz
Power consumption: 8W
Dimensions (Approx.): 430 x 35 x 242 mm (W x H x D) without foot
Weight (Approx.): 1.9 kg
Operating temperature: 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity: 5 % to 90 %
• OUTPUTS
VIDEO OUT: 1 Vp-p 75 Ω, sync negative, RCA jack x 1 / SCART (TO TV)
COMPONENT VIDEO OUT: (Y) 1.0 V (p-p), 75 Ω,negative sync, RCA jack x 1
(Pb)/(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 1 /
SCART (TO TV)
DIGITAL OUT (COAXIAL): 0.5 V (p-p), 75 Ω, RCA jack x 1
• SYSTEM
Laser: Semiconductor laser, wavelength 650 nm
Signal system: PAL / NTSC
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 95 dB (DVD/CD)
• ACCESSORIES
Remote control (1), Batteries (2)
2-1
SECTION 2
CABINET & MAIN CHASSIS
CONTENTS
EXPLODED VIEWS .....................................................................................................................2-2
1. Cabinet and Main Frame Section ...........................................................................................2-2
2. Deck Mechanism Section(DPS-02).........................................................................................2-3
3. Packing Accessory Section ....................................................................................................2-4
2-2
EXPLODED VIEWS
1. Cabinet and Main Frame Section
A
5
4
3
2
1
BCD
463
463
300
463
463
250
I/O,JACK Model
ONLY
A48
A46
463
467
465
320
A44
261
A00
463
A47
452
276
274
452
A50
280
A45
260
261
A43
2. Deck Mechanism Section(DPS-02)
2-3
431
005
007
432
432
007
433
00
A00
6
033
031
431
034
035
A03
032
110
A01
431
109
021
020
A02
115
113
111
112
114
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
AC ADAPTOR830
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
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ....................3-10
1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL. ....................................................3-10
2. SDRAM CLOCK ......................................................................................................................3-12
3. LOADING CONTROL RELATED 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. DISC TYPE JUDGEMENT WAVEFORM ................................................................................3-14
8. FOCUS ON WAVEFORM ........................................................................................................3-16
9. SPINDLE CONTROL WAVEFORM(NO DISC CONDITION ...................................................3-17
10. TRACKING CONTROL RELATED SIGNAL(System checking).........................................3-18
11. MT1389B AUDIO OPTICAL AND COAXIAL OUTPUT (SPDIF) ..........................................3-19
12. MT1389B VIDEO OUTPUT WAVEFORM .............................................................................3-19
13. MT1389B AUDIO OUTPUT TO AUDIO DAC .......................................................................3-20
14. AUDIO OUTPUT FROM AUDIO DAC ..................................................................................3-21
15. MEMORY SLOT DATA SIGNAL ...........................................................................................3-21
16. MEMORY SLOT DATA SIGNAL ...........................................................................................3-21
17. MEMORY CLOCK & RESET SIGNAL..................................................................................3-22
BLOCK DIAGRAMS ..................................................................................................................3-23
1. Overall Block Diagram ..........................................................................................................3-23
2. Power(SMPS) Block Diagram ...............................................................................................3-24
3. SERVO Block Diagram ..........................................................................................................3-25
4. MPEG & MEMORY Block Diagram .......................................................................................3-26
5. VIDEO & AUDIO Block Diagram ...........................................................................................3-27
CIRCUIT DIAGRAMS ................................................................................................................3-28
1. Power(SMPS) Circuit DIAGRAM...........................................................................................3-28
2. AV/JACK Circuit DIAGRAM ...................................................................................................3-30
3. SYSTEM Circuit DIAGRAM ...................................................................................................3-32
4. 9 IN 2 MEMORY SLOT Circuit DIAGRAM.............................................................................3-34
5. TIMER Circuit DIAGRAM .......................................................................................................3-36
6. 5.1CH & KARAOKE(KARAOKE MODEL ONLY) Circuit DIAGRAM ...................................3-38
7. SCART Circuit DIAGRAM .....................................................................................................3-40
• CIRCUIT VOLTAGE CHART ....................................................................................................3-42
PRINTED CIRCUIT DIAGRAMS ............................................................................................3-44
1. MAIN P.C.BOARD ...................................................................................................................3-44
2. KEY P.C.BOARD.....................................................................................................................3-46
3. TIMER P.C.BOARD .................................................................................................................3-47
4. SMPS P.C.BOARD ..................................................................................................................3-48
5. MEMORY P.C.BOARD ............................................................................................................3-49
6. 5.1CH P.C.BOARD ..................................................................................................................3-50
3-2
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power check flow
No 3.3VA
Replace the FR101 (Use the same ICW)
Is the FR101 Normal?
Is the Vcc (about 8.7V) supplied to IC101 Pin2?
Is the D105/ D106/ D107/ D108 Normal?
NO
NO
NO
NO
NO
NO
NO
Replace the D105/ D106/ D107 /D108
Check or Replace the IC101
Replace the D121
Replace the IC103
Replace the D123
Replace the D125
YES
YES
YES
YES
YES
YES
Is the D121 normal?
YES
YES
Is there about 2.5V at the IC103 Pin1?
Is the D123 normal?
Is the D125 Normal?
Power Line of Main
PCB(DVD) is short
No 12V
Check or Replace the D125
Is the Vcc(=14V) sup­plied to Q123 Collector?
Check or Replace the Q123
Is the Vcc(=12V) sup­plied to Q126 Base?
NO
NO
Check the ‘PWR CTL “H”’ signal from µ-com
YES
YES
YES
No REG 5.0V
Check or Replace the D123
Is the Vcc(=5.6V) sup­plied to Q126 Collector?
Check or Replace the Q126
Is the Vcc(=12V) sup­plied to Q126 Base?
NO
NO
Check the ‘PWR CTL “H”’ signal from µ-com
YES
YES
YES
3-3
2. System operation flow
NO
NO
NO
YES
YES
YES
YES
Power On
1. 8032 initializes SERVO,DSP & RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
Exist Disc
Disc loading
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 and 1.8V DC outputs normal on main PCBA?
YES
Connect to PC RS232 Cable and update the FLASH memory code.
YES
Update FLASH successfully?
YES
A
Replace power PCBA or AC transformer.
NO
Repair or Replace Power PCBA
NO
Check the regulators or related diodes.
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.
NO
3-5
A
Flash Memory operates properly?
Show LOGO?
Does the disc move inside?
B
NO
NO
YES YES
YES
YES
YES
YES
YES
YES
YES
Check connection lines between FLASH & MT1389B and the FLASH access time whether is suitable or not.
NO
SDRAM works properly?
Check connection lines between SDRAM & MT1389B and the SDRAM is damaged.
NO
MT1389B VIDEO outputs properly?
Check the related circuit of MT1389B.
NO
Have TV signal output?
Check AV cable connection to TV set.
Sen_load3 & sen_unload3 level<1volt
Check the filtering and amp circuit of TV signal.
NO
Check the sensor of MD
NO
Normal TRCLOSE & TROPEN signal?
Check the Tray control IO pins on MT1389B & IP9005.
NO
Normal LOAD+ & LOADsignal?
Check the cable connection between main PCBA and loader.
Check the Tray control amplifying circuit on Motor driver.
NO
3-6
B
Motor Driver STBY Pin is High?
Does the SLED move to inner side when it is at outter position?
Optical Lens has movements for searching Focus?
C
NO
NO
YES
YES
YES
YES
YES
YES
Check the connection line of STBY signal.
NO
Is FMSO DC Level higher than 1.4V?
Check the related circuit of FMSO.
NO
SL+ and SL- output properly?
YES
Check the amp circuit on motor driver.
Check FOSO connection on MT1389B and motor dirver.
NO
NO
Check the cable connection with MECHA.
Proper FOSO outputs to motor driver?
Proper F+ & F- outputs?
Check the amp circuit on motor dirver.
NO
Check cable connect on with pick-up head.
3-7
C
LD01 or LD02 output properly?
Laser turns on when reading disc?
Disc ID is correct?
Does spindle rotate?
D
NO
NO
NO
YES
YES
YES
YES
YES
Check the laser power circuit on MT1389B and connecting to power transistor.
NO
Collector voltage of power transistor is OK?
Check the related circuit on laser power transistor
NO
Check cable connection between transistor ouput and pick-up head.
YES
YES
YES
Check the related circuit on MT1389B RFL signal.
Check DMSO related circuit on MT1389B.
NO
NO
Check the spindle control amp circuit of motor driver.
NO
Proper RFL signal on MT1389B?
Check LDO1 & LDO2 signal
Proper DMSO signal on MT1389B
SP+ & SP- output properly?
Check the cable connection between spindle and main PCBA.
3-8
D
Proper signals on A, B, C, D of MT1389B
Focus ON OK?
Track On OK?
Disc is play ?
E
NO
NO
NO
YES
YES
YES
YES
YES
Check connections between MT1389B and pick-up head.
NO
Check FEO signal on MT1389B
YES
Check the FOSO connection on MT1389B and motor driver.
NO
Check FOSO signal on MT1389B
YES
YES
Check the TRSO connection on MT1389B and motor dirver.
NO
Check the tracking control amp circuit on motor driver.
NO
Normal TEO Signal on MT1389B?
NO
Check the related
circuit on MT1389B
Properly TRSO signal on MT1389B?
T+ & T- output properly?
Check cable connection on pick-up head.
Check RFO & RFLVL signal waveform.
3-9
E
Audio DAC received correct data stream?
Normal Audio output when disc playback?
Normal IR.VFD & Front pannel key functions?
TEST END
NO
NO
YES
YES
YES
YES
Check connection between MT1389B & Audio DAC.
NO
Normal Audio DAC out?
YES
Check the related circuit of Audio DAC.
NO
Check Audio filter, amplify,mute circuit.
Communications between IR.VFD Front pannel key & MT1389B is normally?
NO
Check communication lines on MT1389B.
Check the cable connection on Front pannel.
3-10
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL.
1) MT1389B main clock is at 27MHz(X501)
FIG 1-1
1.0V, 27MHz
2) MT1389B reset is low active.
FIG 1-2
Reset Time
3.3VA
PWR_CTL
RESET
3-11
3) RS232 waveform during procedure(Downloading)
FIG 1-3
TXD
RXD
4) Flash R/W enable signal during download(Downloading)
FIG 1-4
PRD
PWR
3-12
2. SDRAM CLOCK
FIG 2-1
3. LOADING CONTROL RELATED SIGNAL
FIG 3-1
DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V
SEN_UNLOAD3
SEN_LOAD3
CLOSE_SW
3-13
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)
FIG 4-1
5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)
FIG 5-1
FOSO(1.5V/1.4V/1.3V)
F+(3.2V/2.7V/2.2V)
F-(3.2V/2.7V/2.2V)
FMSO(1.9V/1.4V/1.1V)
STBY(3.3V)
SL+(4.2V/2.8V/1.2V)
SL-(4.2V/2.8V/1.5V)
3-14
6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)
FIG 7-2 (DVD)
7. DISC TYPE JUDGEMENT WAVEFORM
FIG 7-1
DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V
F+
FE
RFL
MDI1(0V/180mV)
LD01(3.3V//2.3V)
LD02(3.3V/2.3V)
3-15
FIG 7-2 (DVD)
FIG 7-3 (CD)
F+
F+
FE
FE
RFL
RFL
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