PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY, SUBJECT : X-RADIATION NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC- 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER- TURER’S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY SONNEL COVER THE SUBJECT OF X-RADIATION.
SERVICING PRECAUTIONS CAUTION : Before servicing the DVD covered by this service Electrostatically Sensitive (ES) Devices data and its supplements and addends, read and follow the Some semiconductor (solid state) devices can be damaged SAFETY PRECAUTIONS. NOTE : if unforeseen circum- easily by static electricity.
SPECIFICATIONS • GENERAL Power requirements: AC 200-240 V , 50/60 Hz Power consumption: Dimensions (Approx.): 8, 7, 6 TOOL : 430 x 35 x 242 mm (17 x 1.4 x 9.5 inches) 4, 3 TOOL : 360 x 35 x 242 mm (14.2 x 1.4 x 9.5 inches) (W x H x D) without foot Weight (Approx.): 8, 7, 6 TOOL : 1.9 kg (4.2 lbs)
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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...
EXPLODED VIEWS 1. Cabinet and Main Frame Section 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. OPTIONAL PART KARAOKE MODEL ONLY KARAOKE MODEL ONLY...
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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, FLASH R/W SIGNAL.............3-11 2.
ELECTRICAL TROUBLESHOOTING GUIDE 1. Power check flow No 3.3VA No REG 5.0V Is the FR101 Replace the FR101 Is the Vcc(=5.6V) sup- Check or Replace Normal? (Use the same ICW) plied to Q126 Collector? the D123 Is the D105/ D106/ Replace the D105/ Is the Vcc(=12V) sup- Check the ‘PWR CTL...
2. System operation flow Power On 1. 8032 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.
3. Test & debug flow TEST Check the AC Voltage Replace power PCBA or AC transformer. Power PCBA(110V or 220V) Switch on the Power PCBA Is the DC Voltage outputs OK? Repair or Replace Power PCBA (5V, 3.3V, 12V,5.6V MOTOR) Make sure the main PCBA don't short on VCCs and switch it on.
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Check connection lines between Flash Memory operates Show LOGO? FLASH & MT1389E and the FLASH properly? access time whether is suitable or not. Check connection lines SDRAM works properly? between SDRAM & MT1389E and the SDRAM is damaged. MT1389E VIDEO outputs Check the related circuit of properly? MT1389E.
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Does the SLED move to Motor Driver STBY Pin is Check the connection line of inner side when it is at outter High? STBY signal. position? Is FMSO DC Level higher Check the related circuit of than 1.4V? FMSO. SL+ and SL- output Check the amp circuit on properly? motor driver.
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Check the laser power circuit Laser turns on when LD01 or LD02 output on MT1389E and connecting reading disc? properly? to power transistor. Collector voltage of Check the related circuit on power transistor is OK? laser power transistor Check cable connection between transistor ouput and pick-up head.
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Proper signals on A, B, C, Check connections between Focus ON OK? MT1389E and pick-up head. D of MT1389E Check the FOSO Check FEO signal on connection on MT1389E MT1389E and motor driver. Check FOSO signal on MT1389E Normal TEO Signal on Check the related circuit on Track On OK? MT1389E?
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Normal Audio output Audio AMP IC received Check connection between when disc playback? correct data stream? MT1389E & Audio AMP IC. Check the related circuit of Normal Audio AMP IC out? Audio AMP IC. Check Audio filter, mute circuit. Communications between Normal IR.VFD &...
4. KARAOKE Flow (KARAOKE MODEL ONLY) Start Insert the Mic jack Is the Mic signal at the IC801 pin3. Is the Mic signal at the IC801 Pin 2. Replace IC801. Does the Mic Check pattern. signal input the IC601 Pin224. Is the Mic signal at the IC801 Pins3, 7 normal? Replace the mic jack...
DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL. 1) MT1389E main clock is at 27MHz(X601) 1.0V, 27MHz FIG 1-1 2) MT1389 reset is low active. 3.3VA PWR_CTL RESET Reset Time FIG 1-2 3-11...
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3) RS232 waveform during procedure(Downloading) FIG 1-3 4) Flash R/W enable signal during download(Downloading) FIG 1-4 3-12...
4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) FMSO(1.9V/1.4V/1.1V) STBY(3.3V) SL+(4.2V/2.8V/1.2V) SL-(4.2V/2.8V/1.5V) FIG 4-1 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) FOSO(1.5V/1.4V/1.3V) F+(3.2V/2.7V/2.2V) F-(3.2V/2.7V/2.2V) FIG 5-1 3-14...
2. Voltages are DC-measured with a digital voltmeter MODIFIED OR ALTERED WITHOUT PERMISSION IMPLEMENTATION OF THE LATEST SAFETY AND during Play mode. FROM THE LG ELECTRONICS CORPORATION. ALL PERFORMANCE IMPROVEMENT CHANGES INTO COMPONENTS SHOULD BE REPLACED ONLY WITH THE SET IS NOT DELAYED UNTIL THE NEW SERVICE TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR- LITERATURE IS PRINTED.
• CIRCUIT VOLTAGE CHART MODE MODE MODE MODE MODE MODE MODE MODE MODE STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.