Text preview for : DV-379.pdf part of LG DV-379 LG DVD DV-379 Service Manual
Back to : DV-379.part1.rar | Home
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
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
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. 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.
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. A.C. VOLTMETER
GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC
PLACE THIS PROBE ON EACH EXPOSED METAL PART
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.
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 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 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 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.)
1-4
SECTION 2 CABINET & MAIN CHASSIS
CONTENTS
1. EXPLODED VIEWS ................................................................................................................2-2
1. Cabinet and Main Frame Section ...........................................................................................2-2 2. Deck Mechanism Section........................................................................................................2-4 3. Packing Accessory Section ....................................................................................................2-5
2-1
EXPLODED VIEWS
1. Cabinet and Main Frame Section 5
250 463
OPTIONAL PART
4
A46 465
463
463
463
3
A00
463
A48
320
SCART&5.1CH MODEL ONLY
467
261
A44
463
260
A49
A43 463 261 300 A47 A41 A42 452 KARAOKE MODEL ONLY 279 KARAOKE MODEL ONLY
2
1
A
B
2-2
C
283
280
D
2. Deck Mechanism Section 5
A00
A01
001 002 003
4
004
431 012 433 026 024A 436 022A 022
430
021 430
023
3
435 012 024A 024B 436 024 027 436 028 029 011 018 014 013 017 434 030 431 031 032 010 025
2
A03
431 015B 015A 015C 020 011A
A02
015
1
A
B
2-4
C
D
3. Packing Accessory Section
806 RF CABLE 810 CABLE SET ASS'Y 811 PLUG ASS'Y 1WAY(YELLOW)
812 PLUG ASS'Y 2WAY 808 BATTERY 820 PLUG ASS'Y 1WAY(BLACK) 900 REMOCON 801 OWNER'S MANUAL
804 PACKING SHEET 803 PACKING 803 PACKING
802 BOX CARTON
OPTIONAL PARTS
SECTION 3 ELECTRICAL
CONTENTS
ELECTRICAL TROUBLESHOOTING GUIDE......................................................................3-2
Power check flow.....................................................................................................................3-2 System operation flow ............................................................................................................3-3 Test & debug flow ....................................................................................................................3-4 Karaoke flow ..........................................................................................................................3-10 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING ....................3-11 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL........................................................3-11 2. SDRAM CLOCK ......................................................................................................................3-13 3. TRAY OPEN/CLOSE SIGNAL ................................................................................................3-13 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) ............................................3-15 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) .............................................3-15 6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION) ............................3-16 7. DISC TYPE JUDGEMENT WAVEFORM ................................................................................3-16 8. FOCUS ON WAVEFORM........................................................................................................3-18 9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION).................................................3-19 10. TRACKING CONTROL RELATED SIGNAL(System checking).........................................3-20 11. RF WAVEFORM ....................................................................................................................3-21 12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)..........................................3-21 13. MT1379 VIDEO OUTPUT WAVEFORM................................................................................3-22 14. AUDIO OUTPUT FROM AUDIO DAC ..................................................................................3-23 BLOCK DIAGRAMS ..................................................................................................................3-25 1. Overall Block Diagram ..........................................................................................................3-25 2. Power(SMPS) Block Diagram ...............................................................................................3-26 3. SERVO Block Diagram ..........................................................................................................3-27 4. MPEG & MEMORY Block Diagram .......................................................................................3-28 5. VIDEO & AUDIO Block Diagram ...........................................................................................3-29 6. Karaoke Block Diagram ........................................................................................................3-30 CIRCUIT DIAGRAMS ................................................................................................................3-31 1. Power(SMPS) Circuit DIAGRAM...........................................................................................3-31 2. SYSTEM Circuit DIAGRAM ...................................................................................................3-33 3. RF & SERVO Circuit DIAGRAM ............................................................................................3-35 4. TIMER, 5.1CH, SCART, KARAOKE Circuit DIAGRAM ........................................................3-37 5. AV/JACK Circuit DIAGRAM...................................................................................................3-39 · CIRCUIT VOLTAGE CHART ....................................................................................................3-41 PRINTED CIRCUIT DIAGRAMS ............................................................................................3-45 1. MAIN P.C.BOARD ...................................................................................................................3-45 2. KEY P.C.BOARD.....................................................................................................................3-47 3. TIMER P.C.BOARD .................................................................................................................3-47 4. SCART & 5.1CH P.C.BOARD(OPTIONAL PART) .................................................................3-49 5. POWER P.C.BOARD...............................................................................................................3-49 6 KARAOKE P.C.BOARD (KARAOKE MODEL ONLY) ............................................................3-50
3-1
1. 2. 3. 4.
ELECTRICAL TROUBLESHOOTING GUIDE
1. Power check flow
A. No VF+ B. No 5V_A .
Is 5.2VA section working?
YES
NO
NO
Is 5.2VA section working?
YES
Check F102
YES
No 5.2VA.
NO
Is 5.2V present at emitter of Q107?
YES
Replace D109.
Check F101
Replace Q107.
YES
Is there a DC voltage at R101?
NO
NO
Replace R101.
YES
Is there a DC voltage At (+) terminal of BD101?
YES
NO
Replace BD101.
Replace IC101.
3-2
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 Closed? No
Tray Close to Closed position
SLED at Inner Side? No
Yes
SLED Moves to Inner Position
1. Judge whether have disc and disc type 2. Jump to related disc reading procedure
Recieve OPEN/ CLOSE Key? No 1. Execute Pressed Key & IR Key 2. Systemoperati on Routi ne Loop
1. Stop Playback & Open Tray 2. Display tray open message & LOGO
No
Receive CLOSE Key?
Yes
3-3
3. Test & debug flow
TEST
Check the AC Vol tage Power PCBA (110V or 220V) Yes
No
Check the POWER PART
Switch on the Power PCBA
Is the DC Vol tage outputs OK? (5V, 3.3V, 8V, 12V) Yes
No
Check the POWER PART
Make sure the main PCBA don't
Is 3.3V and 2.5V DC outputs normal on main PCBA? Yes
No Check the regulators or diode( D670).
No Communication between IC901 & MT1379 is normally?
Check the cable connection Front Panel & Communication Signal
Connect to PC RS232 Cable and update the FLASH memory code.
Update FLASH(IC5A1) successfully? Yes
No
1. Check 27MHz system clock. 2. Check systemreset circuit. 3. Check FLASH R/Wenable signal PRD, RWR. 4. Check RS232 SIGNALS. 5. Check FLASH Memory related circui t.
Replace FLASH( IC5A1) A
3-4
A
RESET or Power On.
Show LOGO?
Flash Memory operates properly?
Check connecti on lines between FLASH & MT1379 and the FLASH access time whether is sui table or not.
SDRAM works properl y?
Check connection lines between SDRAM(IC502,IC503) & MT1379 and the SDRAM is damaged.
MT1379 VIDEO outputs properly?
Check the rel ated ci rcui t of MT1379. (IC501 PIN 161,166, 168 check)
Have TV signal output?
Check the fi l teri ng and amp ci rcui t of TV si gnal .(IC604)
Check AV cable connection to TV set .
Does Tray move inside when it is not at closed position?
Normal TROUT & TRIN signals?
Check the load OPEN & CLOSE switch
Normal TRCLOSE & TROPEN signal?
Check the Tray control IO pins on MT1376 & MT1379.
Normal LOAD+ & LOADsignal ?
Check the Tray control amplifying circuit on Motor driver.(IC202)
B
Check the cable connection between main PCBA and loader. (MECHA)
3-5
B
Does the SLED move No to inner side when it is at outter positi on? Yes
Motor Driver STBY Pin is High? Yes
No
Check the connection line of STBY signal .
Motor Driver STBY Pin is High? Yes
No
Check the rel ated circuit of FMSO.
SL+ and SL- output properl y? Yes
No
Check the amp circuit on motor driver.
Do not put in disc and tray close.
Check the cable connection with MECHA.
Optical Lens has movements for searching Focus? Yes
Proper FOSO outputs to motor driver? Yes
No
Check FOSO connection on MT1379 and motor dirver.
Proper F+ & F- outputs? Yes
No
Check the amp circuit on motor dirver.
C
Check cable connect on with pick-up head.
3-6
C
Laser turns on when reading disc? Yes
No
LD01 or LD02 output properly? Yes Collector voltage of power transistor is OK? ( Q204, Q205) Yes
No
Check the laser power circuit on MT1336 and connecting to power transistor. (Q204, Q205)
No
Check therel ated ci rcuit on laser power transi stor
Check cable connection between transistor couput and pick-up head.
Put disc in? Yes
No
Laser off
Disc ID is correct? Yes
No
Proper RFL signal on MT1336? Yes
No
Check the related circuit on MT1336 RFL signal .
Check the RFL connection between MT1336 and MT1379.
Does spindle rotate? Yes
No
Proper DMSO signal on MT1379 Yes
No
Check DMSO related circuit on MT1379.
SP+ & SP- output properly? Yes
No
Check the spindle control amp circuit of motor driver.
Check the cable connection between spindle and main PCBA.
D
3-7
D Yes
Focus ON OK? Yes
No
Proper signals on A, B, C, D of MT1336 Yes
No
Check connections between MT1336 and pick-up head.
Proper FEO signal on MT1336? Yes
No
Check the related circuit on MT1336 FEO sugnal .
Check FEO connection between MT1336 and MT1379
Track On OK?
Proper FEO signal on MT1336? Yes
No
Check the related circuit on MT1336
Yes
Properly TRSO signal on MT1379? Yes
No
Check the TRSO connection on MT1379 and motor dirver.
T+ & T- output properly? Yes
No
Check the tracking control amp circuit on motor driver.
Check cable connection on pick-up head.
Disc is play?
No Check RF signal waveform.
Yes
E
3-8
E
Normal Audio output when disc playback?
Audio DAC received correct data stream?
Check connection between MT1379 & Audio DAC. (Check VRST#, ACLK, ABCK, ASDAT3)
Normal Audio DAC out? (IC601)
Check the related circuit of Audio DAC. (Check Audio out Pin 14, 15,18,19)
Check Audio filter, amplify, mute circuit. (IC602 Application circuit)?
Normal IR. VFD & Front pannel key functions?
Communications between IR.VFD Front pannel key & MT1379 & Front u-com(IC901) is normally?
Check communi cation lines on MT1379.
TEST END
Check the cable connection on Front pannel.
3-9
4. KARAOKE Flow (KARAOKE MODEL ONLY)
Start
Insert the Mic jack
Is the Mic signal at the IC801 pin3. YES
NO
Is the Mic signal at the IC801 Pin 2. NO
YES
NO Replace the IC5K1.
Is the Digital signal output at the IC5K1 Pin1. YES
Replace IC801.
Is the Mic signal at the IC801 Pins3, 7 normal?
NO Replace the mic jack
NO Check pattern.
Does the Mic signal input the IC501 Pin152. YES Replace the VR801.
Replace IC501.
3-10
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING
1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) MT1379 main clock is at 27MHz(X501)
3.8V, 27MHz
FIG 1-1
2) MT1379 & MT1336 reset is high active.
Power Cord in
5.2VA
PWR_CTL(CN505 PIN 7) M_RESET(CN505 PIN 9)
URST(IC501 PIN 188)
FIG 1-2
3-11
3) RS232 waveform during procedure(Downloading)
TXD(J6 PIN3)
RXD(J6 PIN 2)
FIG 1-3
4) Flash R/W enable signal during download(Downloading)
FRD(IC5A1 PIN 28)
FWR(IC5A1 PIN 11)
FIG 1-4
3-12
2. SDRAM CLOCK 1) MT1379 main clock is at 27MHz(X501)
DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V
(IC502,IC503 PIN 35)
FIG 2-1
3. TRAY OPEN/CLOSE SIGNAL 1) Tray open/close waveform
OPEN((CN203 PIN 3)
CLOSE(CN203 PIN 2) TROPEN(IC202 PIN 1)
TRCLOSE(IC202 PIN 2)
FIG 3-1
3-13
2) Tray close waveform
OPEN((CN203 PIN 3) CLOSE(CN203 PIN 2)
TROPEN(IC202 PIN 1)
TRCLOSE(IC202 PIN 2)
FIG 3-2
3) Tray open waveform
OPEN((CN203 PIN 3)
CLOSE(CN203 PIN 2) TROPEN(IC202 PIN 1)
TRCLOSE(IC202 PIN 2)
FIG 3-3
3-14
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)
FMSO(2.0V/1.4V/1.0V) (IC501 PIN 19) STBY(5V) (IC201 PIN 50)
SL+(4.7V/3.6V/1.9V) (IC202 PIN 12)
SL-(5.3V/3.7V/2.5V) (IC202 PIN 13)
FIG 4-1
5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)
FOSO(1.5V/1.4V/1.3V) (IC501 PIN 12)
F+(4.0V/3.6V/3.2V) (IC202 PIN 9)
F-(4.0V/3.6V/3.2V) (IC202 PIN 8)
FIG 5-1
3-15
6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)
MDI1(0V/180mV) (IC201 PIN 124) LD01(5.0V//3.5V) IC201 PIN 125)
LD02(5.0V/3.6V) (IC201 PIN 126)
FIG 6-1
7. DISC TYPE JUDGEMENT WAVEFORM
F+(IC202 PIN 9)
FE(IC201 PIN 18)
RFL(IC201 PIN 19)
FIG 7-1 (DVD)
3-16
F+(IC202 PIN 9)
FE(IC201 PIN 18)
RFL(IC201 PIN 19)
FIG 7-2 (DVD)
F+(IC202 PIN 9)
FE(IC201 PIN 18)
RFL(IC201 PIN 19)
FIG 7-3 (CD)
3-17
F+(IC202 PIN 9)
FE(IC201 PIN 18)
RFL(IC201 PIN 19)
FIG 7-4 (CD)
8. FOCUS ON WAVEFORM
FE(IC201 PIN 18)
FOSO(IC501 PIN12) F+(IC202 PIN 9)
F-(IC202 PIN 8)
FIG 8-1 (DVD)
3-18
FE(IC201 PIN 18)
FOSO(IC501 PIN12) F+(IC202 PIN 9)
F-(IC202 PIN 8)
FIG 8-2 (CD)
9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)
DMSO(1.4V/1.8V) (IC501 PIN 18) SP-(3.6V/2.4V) (IC202 PIN 10)
SP+(3.6V/4.8V) (IC202 PIN 11)
FIG 9-1
3-19
10. TRACKING CONTROL RELATED SIGNAL(System checking)
TE(IC201 PIN 21)
TRSO(IC501 PIN 13)
T-(IC202 PIN 7)
T+(IC202 PIN 6)
FIG 10-1(DVD)
TE(IC201 PIN 21)
TRSO(IC501 PIN 13)
T-(IC202 PIN 7)
T+(IC202 PIN 6)
FIG 10-2(CD)
3-20
11. RF WAVEFORM
RFOP(2.3V/1.1V) (IC201 PIN 6)
RFON(0.8V/2.0V) (IC201 PIN 7)
FIG 11-1
12. MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF)
(IC501 PIN 153)
FIG 12-1
3-21
13. MT1379 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal(CVBS)
DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V
(IC604 PIN 23)
FIG 13-1
2) Y
(IC604 PIN 21)
FIG 13-2
3-22
3) C
DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V
(IC604 PIN 26)
FIG 13-3
14. AUDIO OUTPUT FROM AUDIO DAC 1) Audio L/R
(JK601 PIN 4,5)
FIG 14-1
3-23
2) Audio related Signal
ASDATA3
ASDAT3(IC501 PIN 157)
ABCK(IC501 PIN 148)
ALRCK(IC501 PIN 149)
FIG 14-2
3-24
DISC
DV33 DV33 DV33 DV33
SPINDLE MOTOR
APC
M
PICK UP
DVD:RF0,A,B,C,D CD:RF0,A,B,C,D,E,F MDI1 LD01,LD02, IOA, V2.0
IC5A1 29LV800TA-70 1M 8BIT FLASH ROM
IC502 M12L16161A 512K 2Banks 16BIT SDRAM
IC503 M12L16161A 512K 2Banks 16BIT SDRAM
IC506 M12L64164A 1M 4Banks 16BIT SDRAM
1. Overall Block Diagram
BLOCK DIAGRAMS
DECK MECHANISM
A[00:19] PCE# AD[0:7] PRD# PWR# DQM[2:3] DQM[0:1] MA11,BA1 DQ[00:15] DQ[16:31] MA[00:10] BA0 DCLK DCKE CS# RAS# CAS# WE# TXD RXD
SLED LOADING (FEEDING) MOTOR MOTOR
M
M
AV33/DV33/V25
DV33 J6 RS232 V33
SCL
F+,F-,T+,T-
SP+,SP-
SL+,SL-
LOAD+,LOAD-
RVCC
LIMIT RFON,RFOP,FEO,RFL,CSO TEO,BDO,RFRP,HTRC,V2P8 SCLK,SDEN,SDATA PWMOUT2
SDA
TROUT,TRIN
IC505 KS24C021CS EEPROM
MIC_DETC AMDAT ACLK ABCLK ALRCK
STBY,TRCLOSE
°<
3-25
URST PWRCTL VFD_SCK VFD_TXD M_REQ VFD_RXD VCC S_REQ IC510 27MHz X-TAL VF+ VF-27VA 5V2A 5V RVCC AVCC 12V DV33 AV33 3V3M V25 +P8V 6MHz X-TAL +12V VCC
V1P4
VCC
IC202 LA6560 MOTOR DRIVER
IC201 MT1336E RF IC501 MT1379E DSP/MPEG
IC5K1 CS5331A(ADC) IC5K2 KA741(OP-AMP)
VCC/DV33/3V3M
MIC_IN
VCC/+8V
TROPEN,TRSO,FOSO,DMSO,FMSO
ADIN
IC601 CS4391(2DAC) IC451 PCM1603(6DAC)
Y[1:6] MUTE ASPDIF ASPECT
BUFFER IC 74HCT244 VCC IC903 RESET IC
VRST# ASDAT[0:3] VSCK VSDA ASTB
L/R
FL RL CENTER FR RR WOOFER
VCC
AC 90V~240V 50HZ/60Hz
POWER BOARD
DIG901 FLD DISPLAY
IC901 GMS81C2012(Hynix) Front Micom
RC901 REMOCON RECEIVER
IC604 MM1623XFBE VIDEO BUFFER
R/Pr G/Y B/Pb Y C
+12V IC602/IC302/IC303/IC304 NJM4580 OP-AMP
CVBS COAX OPTICAL L/R FL FR RL CENTER RR WOOFER
DV7800M'S
KEY Input
ON/OFF VFRECTIFIER(FLD) -29VA
VF+
RECTIFIER(14V) REG(12V)
LPF
12V
2. Power(SMPS) Block Diagram
TRANS
RECTIFIER(9V) LPF
RECTIFIER RECTIFIER(5.2V) LPF
REG(8V)
8V 5.2VA 5V_A
SWITCHING IC
3-26
RECTIFIER(3.8V)
LPF
REG(3.3V)
3.3V/3.3V_M
LINE FILTER FEED B.
PWR ON/OFF
DV7800M'S
AC90~240V
X501
27MHz X-TAL
SDEN, SDATA, SCLK,PWMOUT2 ALPC
AD[0:7]
3. SERVO Block Diagram
LD0 1, LDO 2, IOA MDI 1
RFOP,RFON
FEO,TEO,RFL,RFRP BDO,CSO,HTRC,V2P8
A[0:19]
FLASH ROM
PRD#, PWR# PCE#
PICK UP
V20 DVD: A,B,C,D, RFO CD: A,B,C,D, E, F,RFO
IC201 MT1336E RF Signal Processor
IC501 MT1379 DVDPLAYER COMBO CHIP
SCL, SDA
EEP ROM
RXD, TXD
RS232C(MTK)
DQ[0:15]
DQ[16:31]
3-27
LIMIT,TRIN,TROUT TRCLOSE STBY,V1P4 F+, F-, T+, TADIN SP+, SPSL+, SLLOAD+, LOAD-
MA[0:10] DQM0 ,DQM1 WE#,CAS#,RAS# CS#,BA0, DCLK DCKE
MA[0:10] DQM0 ,DQM1 WE#,CAS#,RAS# CS#,BA0, DCLK DCKE
IC302 GM72V161621 1M x 16bit SDRAM
IC303 GM72V161621 1M x 16bit SDRAM
M/D
IC202 LA6560 Motor Driver
DV7800M'S
FOSO,TRSO,FMSO DMSO,,TROPEN
KARAOKE BOARD
ACLK,ABCK ALRCK AMDAT DQM0,DQM1 DQ[16:31] SCL,SDA
IC5K2 OP Amp IC505 EEPROM
IC5K1 A/D Con. (Karaoke)
DQ[0:15] DCLK,WE,CAS,RAS CS,DCKE,MA[0:10] DQM2,DQM3
IC502 SDRAM 16M
IC503 SDRAM 16M
RFOP,RFON,HTRC,RFRP,RFL
Y2(Y),Y3(Color) Y4(Y),Y5(Cb),Y6(Cr) ASPECT(16:9)
4. MPEG & MEMORY Block Diagram
VIDEO Interface
RF IC Interface
FEO,CSO,TEO,ADIN,BDO SDATA,SDEN,SCLK,URST FMSO,DMSO V1P4,V2P8 TROPEN,TRSO,FOSO
IC501 (MPEG + DSP) MT1379
ACLK,ALRCK,ABCK MUTE,VSCK,VSDA ASDTA[0:3] ASTB,SCL,SDA ASPDIF VFD_SCK VFD_TXD M_REQ
URST,S_REQ VFD_RXD
PWR,PCE,PRD
A[0:19]
X501 27MHz
IC510 (74HCT244)
Voltage level shift
DV7800M'S
FRONT MICOM Interface (FRONT BOARD)
SCKO,TXDO,M-REQ
IC5A1 FLASH MEMORY (8 M )
AD[0:7]
3-28
AUDIO Interface
CVBS
(R.G.B) / (Y.Pb.Pr ) IC604 VIDEO 6dB Amp
COMPONENT (R.G.B) / (Y.Pb.Pr ) SUPER VIDEO (Y/C)
MPEG
(Y/C)
A/V JACK
AUDIO `R' AUDIO `R' ACLK SCL SDA
DAC RESET
MPEG
IC601 AUDIO DAC (2CH) IC602 (OP Amp) LPF&Buffer
5. VIDEO & AUDIO Block Diagram
ADATA3
3-29
5.1CH BOARD
FRONT `R' REAR `R'
DAC RESET ACLK SCL SDA
IC302 (OP Amp) LPF&Buffer IC301 AUDIO DAC (5.1CH)
MPEG MPEG
FRONT `L'
ADATA1
IC303 (OP Amp) LPF&Buffer
REAR `L'
ADATA2 CENTER
ADATA3
DV7800M'S
IC304 (OP Amp) LPF&Buffer
WOOFER
6. KARAOKE Block Diagram(KARAOKE MODEL ONLY)
Microphone1
Microphone Signal PREAMP (BA3308)
AMP (KA741)
AUDIO ADC (CS5331)
MPEG (MT1379)
AUDIO DAC (CS4391)
(Block Digram)
1 The unit turns to KARAOKE MODE with ou-screen lyrics display and melody sound when it play backs VCD or DVD KARAOKE DISC. 2. IF a microphone is connected at this time, MICON recoguizes the connection and prepares the composition of external voice and internal melody. 3. The week signal of the microphone is converted to the digital signal after voice output that has passed through PREAMP(BA3308) and AMP(KA741) passes through(CS5331) that is Audio ADC(Analog to Digital convertor). 4. This digital signal enters NT1379 that is MPEG IC 5. This mixed signal is output to AV JACK after passing through AUDIO DAC(CS4391).
3-30
CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM
IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG ELECTRONICS CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-
CUIT. SPECIAL COMPONENTS ARE SHADED ON THE NOTE : SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFwith specified part number. FER FROM THE ACTUAL CIRCUIT USED. THIS WAY, 2. Voltages are DC-measured with a digital voltmeter IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.
VF(+) Power Dead. F102 is defective. VF(-) Power Dead. ZD101 is defective.
12V Power Dead. IC103 is defective.
Power Dead. IC101 is defective.
8V Power Dead. IC105 is defective. 3.3V Power Dead. IC106 is defective.
5V Power Dead. Q107 is defective.
'02. 12. 26 R16006A
NOTES) NOTES) NOTES) NOTES) Warning Parts that are shaded are critical With respect to risk of fire or electricial shock.
NOTES :
Symbol denotes AC ground. Symbol denotes DC chassis ground.
3-31
3-32
2. SYSTEM CIRCUIT DIAGRAM
No Power on Video signal not appeared
AUDIO DAC interface
VIDEO interface
System not working or screen is abnormal
RF & MOTOR DRIVE interface
System not working or Digitron not display
System not operate
Digitron all not display System not working Video signal Y Video signal Color
Program download fail
'02. 12. 26 R14600A
3-33
3-34
3. RF & SERVO CIRCUIT DIAGRAM
CD/DVD LD will not on
'02. 12. 26 R14601A
3-35
3-36
4. TIMER, 5.1CH, SCART, KARAOKE CIRCUIT DIAGRAM
Power LED abnormal (OPTIONAL PART)
Karaoke not operate.
Remocon not operate
System not operate System not operate or Digitron abnormal or Key not operate. Digital abnormal
(OPTIONAL PART) (OPTIONAL PART) 5.1CH Audio Bad
'02. 12. 26 R14603A
3-37
3-38
5. AV/JACK CIRCUIT DIAGRAM
All Video signal isn't appear or bad
2CH Audio out bad.
SACD OPTION 2CH Audio out bad.
2.5V doesn't appeat System not working
Video Signal Y Video Signal Color
Video Signal CVBS 2CH Audio
'02. 12. 26 R14602A
3-39
3-40
· CIRCUIT VOLTAGE CHART
IC201(MT1336E) IC202(MOTOR) IC501(MT1379) IC502(SDRAM) IC505(EEPROM) IC510(BUFFER) IC5A1(FLASH) IC5K1(KARAOKE) IC601(CS4391) IC602(AMP) IC604(MM1623XFBE) IC201(MT1336E) IC202(MOTOR) IC501(MT1379) IC502(SDRAM) IC505(EEPROM) IC510(BUFFER) IC5A1(FLASH) IC5K1(KARAOKE) IC601(CS4391) IC602(AMP) IC604(MM1623XFBE)
PIN STOP PLAY 1 1.03 2.99 2 5.11 5.08 3 0 0 4 0 0 5 5.11 5.07 6 0 1.95 7 0 0 8 0 0 9 5.11 0 10 5.11 5.08 11 5.11 5.08 12 0 0 13 5.11 0 14 5.11 5.08 15 2.84 2.81 16 1.45 1.43 17 2.08 2.07 18 1.37 1.42 19 0.69 2.3 20 2.4 0 21 2.35 0 22 5.11 5.08 23 0 0 24 2.59 3.2 25 0.19 1.88 26 1.58 0 27 2.56 3.13 28 2 2.01 29 2 2.06 30 2.96 1.52 31 0 0 32 0.06 2.07 33 0.07 2.07 34 0 0 35 0 0 36 0 0 37 5.13 0 38 0 0 39 0 0 40 0 0 41 0 0 42 5.12 5.09 43 5.12 5.09 44 5.12 5.09 45 5.12 5.09 46 5.12 5.09 47 0 0 48 5.12 5.09 49 5.12 0 50 5.08 5.06 51 5.09 5.07 52 5.1 0 53 0 0 54 5.13 0 55 0.09 0.2 56 1.61 0 57 0 0 58 0 0 59 0 0 60 0 0 61 3.28 0 62 0 0 63 0 0 64 0 0 65 0 0 66 0.26 0 67 5.12 5.08 68 0 0 69 5.12 0 70 3.21 2.03 71 3.46 2.2 72 2.81 0 73 0 0 74 0.21 0.09 75 0.22 0 76 0 0.1 77 0.21 0.09 78 0.23 0.09 79 0.21 0.08 80 0.23 0.08
STOP 0 0 8.04 0.12 0 3.64 3.62 3.64 3.6 3.62 3.63 3.62 3.64 8.04 1.45 0.27 0.29 1.45 1.45 1.45 1.45 1.45 1.47 1.45 1.45 0.95 0 1.45 5.15 1.45 1.45 1.45 1.46 5.08 5.15 0
PLAY 0 0 8.01 0.06 0.06 3.69 3.61 3.53 3.76 2.43 4.85 3.72 3.57 8.01 1.48 1.39 1.32 1.43 1.43 0.82 1.43 1.43 1.37 1.43 1.43 0.91 0 1.43 5.11 1.43 1.43 1.43 1.45 5.06 5.11 0
STOP 1.22 0 0.96 2 0 1.48 0 3.2 0.12 0.12 3.25 1.41 1.41 0 1.42 3.3 2.53 1.42 1.42 0 2.61 0.75 2.83 1.9 1.72 0.68 2.84 0 2.85 1.83 0.91 1.43 1.51 1.51 3.3 0.81 1.45 1.82 1.2 2 2.17 2.53 1.96 1.79 0.8 0.8 0.8 3.3 0 0 0 0 0 0 3.25 1.21 0 3.29 0 0 2.59 2.58 0 2.59 3.29 3.3 3.29 2.57 5.19 2.59 0.12 2.53 2.59 3.29 2.61 3.27 0 0.94 0.78 0.89
PLAY 1.22 0 0.9 2.06 1.51 1.47 1.56 1.52 0.06 0.06 3.25 1.49 1.41 0 1.42 0 2.53 2.27 1.39 0 2.58 1.46 1 0.89 0.39 0.31 3.16 0 0.66 0.49 1.39 1.2 1.57 1.43 3.29 1.26 1.02 1.6 1.5 2.06 1.95 2.52 1.9 1.9 1.72 1.96 1.84 2.63 0.13 0.07 0 0 0 0 3.27 1.18 0 3.29 0 0 2.57 2.58 0 2.56 3.29 3.29 3.29 2.56 5.18 2.57 0.08 2.52 2.57 3.29 2.61 3.24 0 1.04 1.06 1.15
STOP 3.27 1.18 1.1 0 0.66 0.85 3.27 0.51 3.06 0 0.06 3.18 3.27 2.94 0.47 2.93 3.21 2.87 0.15 0 3.09 3.09 3.09 3.09 3.27 0 0.15 1.84 1 0.54 0.06 0.05 0 0.73 1.48 2.91 0.07 3.27 1.06 0.47 0 0 1.12 3.27 1.21 1.31 0 1.43 0.88 0
PLAY 3.28 1.26 1.52 0 1.07 1.12 3.28 0.97 0 0 0.98 0.87 3.28 2.56 0.42 3.01 3.22 2.95 1.32 0.05 1.32 1.32 1.32 1.33 3.29 0 1.36 2.36 2.32 1.75 0.06 0.06 0 1.26 1.55 2.53 0 3.28 1.05 0.98 0 0.6 1.24 3.28 0.99 1.34 0 1.44 1.01 0
STOP 0 0 0 0 3.28 3.28 0 3.28
PLAY 0 0 0 0 3.29 3.29 0 3.29
STOP 0 2.59 0 2.59 0 3.24 0 0.14 0 0 0.15 0 0.15 5.19 0.14 5.25 0.15 5.23 0 5.25
PLAY STOP PLAY 0 0.08 0.16 2.55 1.82 0.45 0 2.84 0 2.56 2.83 3.12 0 0.69 0.26 3.23 1.72 0.25 0 1.92 0.9 0.08 1.7 1.45 0 0 0 0 0 0 0.09 3.27 3.29 0 3.56 3.55 0.08 3.29 3.29 5.19 0 0 0.09 0.23 0.06 5.24 0 0 0.08 0 0 5.23 0 0.87 0 1.98 2.64 5.25 2.28 2.18 2.13 1.96 1.67 2.01 1.99 1.72 1.93 2.19 2.05 1.94 0 0 0 0 0 0 1.49 2.03 0.16 1.07 1.96 1.25 0.16 1.1 0.99 2.2 1.17 1.07 0.79 1.82 0.15 1.07 3.29 3.3 1.93 3.09 0.16 1.07 1.5 2.2 0.16 1.07 1.21 2.64 0.16 1.08 1.64 1.48 2.05 2.06 0 0 0 0 0.07 0.13
STOP 2 1.64 1.64 1.58 2.23 0 5.12 2.23
PLAY 0 1.63 1.64 1.56 2.23 0 5.08 2.23
STOP 3.28 3.28 0 1.63 1.64 1.59 0 3.28 3.28 0 5.01 2.31 4.96 1.42 2.4 0 5.11 2.41 2.43 0
PLAY 3.29 3.28 1.65 1.64 1.65 1.61 0 0 3.29 0 5.01 2.31 0 2.41 2.39 0 5.09 2.41 2.43 0
STOP 5.52 5.52 5.51 0 5.51 5.51 5.52 12.03
PLAY 5.49 5.48 5.47 0 5.48 5.48 5.47 12.03
STOP 5.09 2.43 5.09 1.45 0 1.45 0 2.47 0 1.14 0 2.42 5.09 2.43 0 2.49 0 2.48 0 1.18 1.76 0 1.76 0 0 0 0.06 5.09
PLAY 5.08 2.42 5.08 0 0 1.69 0 2.46 0 1.76 0 2.42 5.08 2.42 0 2.47 0 2.47 0 2.3 2.17 0 2.24 0 0 0 0.05 0
PIN STOP PLAY STOP PLAY STOP 81 0.22 0 0.99 82 0 0 2.52 83 0 0 3.09 84 0.07 0 0.37 85 0.07 2.27 3.08 86 1.97 0 3.07 87 1.96 1.9 0.59 88 1.54 1.71 1.57 89 0.19 2.22 3.2 90 0.21 0 2.77 91 0.22 0.06 0.22 92 0.22 0 0 93 0.23 0.06 3.32 94 0.23 0.06 0.16 95 2.28 0 3.31 96 2.28 2.25 3.3 97 2.27 1.23 3.3 98 2.27 2.23 3.32 99 2.27 2.23 0.16 100 2.26 2.23 3.32 101 2.08 2.17 3.3 102 2.07 2.17 0 103 2.07 2.18 1.56 104 2.08 0 0.94 105 0.14 0.15 0.41 106 0.14 0.16 0.05 107 0 0 0 108 1.28 1.28 3.27 109 5.18 5.05 0 110 0.14 0.16 0.19 111 0.15 0.15 3.3 112 0.13 0.16 0.18 113 0.14 0.15 2.98 114 5.1 5.05 3.02 115 2.07 2.09 0 116 2.06 2.09 2.86 117 0 0 2.86 118 0 0 0 119 0 0 0 120 5.1 5.05 2.55 121 0.13 0.15 3.03 122 0.14 0.15 3.03 123 0 0.18 0.22 124 0 0.18 0.22 125 5.08 5.03 0 126 5.08 3.16 3.31 127 0.06 2.08 0.26 128 0 0 3.31 129 3.3 130 3.3 131 3.31 132 0.16 133 3.3 134 3.3 135 0 136 2.86 137 2.86 138 0.07 139 0.09 140 0.07 141 0.07 142 0.09 143 0.07 144 0.09 145 0.09 146 0 147 0.09 148 0.07 149 0.06 150 0 151 0.07 152 0 153 0 154 0 155 0 156 0 157 0 158 0 159 0 160 0
PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY 1.34 2.52 1.33 1.16 1.1 1.08 1.04 2.53 3.13 2.53 1.68 0 1 1.58 1.62 1.08 3.29 1.62 1.09 1.27 1.32 0 1.55 1.25 0 0.06 0.06 3.26 0 1.74 3.29 1.62 2.38 1.48 0 3.01 2.54 0 2.5 2.51 1.4 1.4 1.39 0.34 0 0.98 1.64 1.53 1.15 3.29 1.49 0.89 0 1.07 0 2.53 2.53 0.86 0.99 2.51 0.94 1.13 1.19 1.07 0 1.51 1.25 1.64 0 1.65 3.29 1.6 1.64 1.44 0 0 1.63 3.29 3.27 1.27
3-41
3-42
IC201(MT1336E)
IC202(MOTOR)
IC501(MT1379)
IC502(SDRAM)
IC505(EEPROM)
IC510(BUFFER)
IC5A1(FLASH)
IC5K1(KARAOKE)
IC601(CS4391)
IC602(AMP)
IC604(MM1623XFBE)
PIN STOP PLAY STOP PLAY STOP 161 0 162 0 163 0 164 0 165 0 166 0 167 0 168 0 169 0 170 0 171 0 172 3.01 173 0 174 0 175 0 176 0 177 0 178 0 179 0 180 0 181 2.04 182 0 183 0 184 0 185 0 186 187 0 188 0 189 0 190 0 191 0.23 192 0 193 0 194 0 195 0 196 0 197 0 198 0 199 0 200 0 201 0 202 0 203 0 204 0 205 0 206 0 207 0 208 0 209 0 210 0 211 0 212 0 213 0 214 0 215 1.02 216 0
PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY 1.27 2.35 0 0.73 3.27 0.5 0 0.53 3.27 0.59 0 0.72 0.72 0 2.73 3.13 3.13 3.25 0 0 2.64 2.52 0 0.09 3.26 0.08 0 0 0 0 3.29 0 0 0 0 1.63 0 0 2.15 1.44 1.44 1.43 1.43 1.42 2.1 2.07 1.41 1.52 1.43 2.81 3.28 0.12 0.12 1.43 1.43
E C B
E C B
Q201 STOP PLAY 0 0 0 5.09 0.68 0 Q501 STOP PLAY 0 0 0 0 0.83 0.83
Q202 STOP PLAY 0 0 0 0 0 5.04 Q600 STOP PLAY 5.17 0 0 0.13 5.11 0
Q203 STOP PLAY 0 0 0 0.19 5.04 0 Q603 STOP PLAY 0 0 0 0 0.75 0
Q204 STOP PLAY 5.14 4.34 0 2.42 5.08 3.64 Q604 STOP PLAY 0 0 0 0 0.75 0.16
Q205 STOP PLAY 5.14 5.1 0.5 0 5.08 5.05 Q605 STOP PLAY 0 0 0 0 0.74 0.74
3-43
3-44
PRINTED CIRCUIT DIAGRAMS
1. MAIN P.C.BOARD
LOCATION GUIDE
3-45
3-46
2. KEY P.C.BOARD
( 7 TOOL ) ( 8 TOOL ) ( 9 TOOL )
(Solder Side)
(Solder Side)
(Solder Side)
3. TIMER P.C.BOARD
( 7 TOOL )
LOCATION GUIDE
( 8 TOOL )
LOCATION GUIDE
(Solder Side)
(Solder Side)
( 9 TOOL )
LOCATION GUIDE
(Solder Side)
3-47
3-48
4. SCART & 5.1CH P.C.BOARD(OPTIONAL PART)
LOCATION GUIDE
6. KARAOKE P.C.BOARD (KARAOKE MODEL ONLY)
LOCATION GUIDE
(Solder Side)
(Solder Side)
5. POWER P.C.BOARD
LOACTION GUIDE
(Solder Side)
3-49
3-50