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LG DVD5353 Service Manual

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2. POWER, A/V, FRONT P.C.BOARD
LOCATION GUIDE
3-43
3-44

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Summary of Contents for LG DVD5353

  • Page 1 2. POWER, A/V, FRONT P.C.BOARD LOCATION GUIDE 3-43 3-44...

  • Page 2: Printed Circuit Diagrams

    PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C.BOARD LOCATION GUIDE (BOTTOM SIDE) (TOP SIDE) 3-41 3-42...

  • Page 3: Product Safety Servicing Guidelines For Video Products

    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.

  • Page 4: Servicing Precautions

    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.

  • Page 5: Cabinet Disassembly

    DISASSEMBLY CAUTION BEFORE STARTING SERVICING Electronic parts are susceptible to static electricity and may easily and damaged, so do not forget to take a proper grounding treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screw driver in servicing.

  • Page 6: Circuit Board Disassembly

    CIRCUIT BOARD DISASSEMBLY Note: Before removing the main circuit board, be sure to shortcircuit the laserdiode output land. After replacing the main circuit board, open the land after inserting the flexible connector. (Refer to Mechanism Disassembly) 1. Disassembling of Main Circuit Board and Interface Board 1.

  • Page 7: Power(Smps) Block Diagram

    2. Power(SMPS) Block Diagram TRANS SWITCHING TR LINE FIL TER RECTIFIER DV5000's/DV6000's 3-14...

  • Page 8: Rf/Cd Dsp/Dvd Dsp/Dvd Servo Block Diagram

    3. RF/CD DSP/DVD DSP/DVD SERVO Block Diagram DV5000's/DV6000's 3-15...

  • Page 9: Audio Block Diagram

    4. Audio Block Diagram DV5000's/DV6000's 3-16...

  • Page 10: Mpeg & Memory Block Diagram

    5. MPEG & MEMORY Block Diagram DV5000's/DV6000's 3-17...

  • Page 11: Karaoke Block Diagram(Karaoke Model Only)

    6. KARAOKE Block Diagram(KARAOKE MODEL ONLY) Microphone1 Microphone AUDIO AUDIO Signal MPEG PREAMP (KIA4558) (NS) (CS5331) (CS4392) (BA3308) Microphone1 DVD DSP (P-Processor) (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.

  • Page 12: Power(Smps) Circuit Diagram

    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.

  • Page 13: Dvd Dsp Circuit Diagram

    2. DVD DSP CIRCUIT DIAGRAM '02. 7. 15 R14126A DV5000's/6000's TRACKING LOOP SLED LOOP WAVEFORM FOCUS LOOP SPINDLE LOOP 3-21 3-22...

  • Page 14: Drive & Rf Circuit Diagram

    3. DRIVE & RF CIRCUIT DIAGRAM '02. 7. 15 R14124A DV5000's/6000's TRACKING LOOP SLED LOOP WAVEFORM FOCUS LOOP SPINDLE LOOP 3-23 3-24...

  • Page 15: Mpeg Circuit Diagram

    4. MPEG CIRCUIT DIAGRAM '02. 7. 15 R14125A DV5000's/6000's Optical/Coaxial out Y/Pb/Pr(Componet) WAVEFORM Y/C(S-VHS) CVBS 3-25 3-26...

  • Page 16: Audio Circuit Diagram

    5. AUDIO CIRCUIT DIAGRAM IC401 is defective 2CH Audio out bad IC402 is defective 2CH Audio out bad IC452 is defective 5.1CH FL/FR Audio out bad IC451 is defective 5.1CH Audio out bad IC453 is defective 5.1CH RL/RR Audio out bad IC454 is defective 5.1CH Center/woofer Audio out bad 5.1CH RL SIGNAL...

  • Page 17: Memory Circuit Diagram

    6. MEMORY CIRCUIT DIAGRAM Digitron all not display system not working program download fail Digitron all not display system not workry Digitron all not display system not working Tray not open/close Digitron all not display system not working Tray not open/close '02.
  • Page 18 7. FRONT & MIC CIRCUIT DIAGRAM SYSTEM not operate Digitron abnormal Remocon not operate SYSTEM not operate KARAOKE not operate '02. 7. 15 R10728A 430mm FLD Karaoke 360mm FLD Karaoke 3-33 3-34...

  • Page 19: A/V Jack Circuit Diagram

    8. A/V JACK CIRCUIT DIAGRAM 16:9 can't be changed '02. 7. 15 R10727A DV6000's 430mm/DS6000's 360mm OPTICAL S VIDEO (C) COMP.VIDEO AUDIO (L) S VIDEO (Y) AUDIO (R) 3-35 3-36...

  • Page 20: Exploded Views

    EXPLODED VIEWS 1. Cabinet and Main Frame Section OPTIONAL PART...

  • Page 21: Packing Accessory Section

    O BATTERY,MN ER03X HI WATT 1.5V .MA/H AAA 6851RP0003N O CABLE ASSY,RF DVD CABLE ASSY,RCA USING AREA 6611R1G001A O PLUG ASSY 1WAY YELLOW GLOBAL 6611R2G001A O PLUG ASSY 2WAY RED/WHITE GLOBAL 6711R1P040A O REMOTE CONTROLLER ASSEMBLY N6 UNIFIED DV5812E LG...

  • Page 22: Deck Mechanism Disassembly

    DECK MECHANISM DISASSEMBLY HOLDER CLAMP PLATE CLAMP CLAMP ASSEMBLY DISC MAGNET CLAMP TRAY DISC CLAMP UPPER (S1) (Fig. A) BASE MAIN HOLDER CLAMP EMERGENCY EJECT HOLE (L1) BASE MAIN LEVER HOLDER CLAMP (L1) BASE MAIN BOTTOM SIDE VIEW Fig. 4-1 Fig.
  • Page 23 DECK MECHANISM DISASSEMBLY (L2) GEAR MIDDLE (S2) RUBBER DAMPER (S3) GEAR ASSEMBLY RACK GEAR ASSEMBLY FEED (S2) RUBBER FRONT PICK UP ASSEMBLY GENERAL BASE PU(OUTSERT) (C1) (C2) (C1) PICK UP ASSEMBLY GENERAL MOTOR ASSEMBLY SPINDLE GEAR ASSEMBLY FEED GEAR MIDDLE GAER ASSEMBLY RACK MOTOR ASSEMBLY SPINDLE Fig.

  • Page 24: Frame Up/Down

    DECK MECHANISM DISASSEMBLY GUIDE UP/DOWN GEAR LOADING GEAR PULLEY (L3) (L4) BELT LOADING PWB ASSEMBLY LOADING BASE MAIN (L6) (S5) BASE MAIN FRAME UP/DOWN (L5) GUIDE UP/DOWN FIG. (A) FIG. (B) GUIDE UP/DOWN FIG. (C) Fig. 4-4 5. Frame Up/Down 8.

  • Page 25: Power(Smps) Circuit

    ELECTRICAL TROUBLESHOOTING GUIDE 1. Power(SMPS) Circuit No 5V_D No VF+ or 5V_A . Is 5.2VA section working? Is 5.2VA section working? Is oscillation present at the Is oscillation present at the anode of D109? Base of Q108? No 5.2VA. Replace D109. Replace Q108.

  • Page 26: Μ-Com Circuit

    2. µ-COM Circuit A. No Power POWER ON Does Hello appear at FLD? Is P5901 Does no DISC appear? connected normally? Reconnect it. Does Logo appear Check power. on the screen? (Refer to power) If power is normal Is P5901 Pin 23 normal? Refer to Front Part The waveform Is oscillation of...
  • Page 27 B. Audio abnormal C. Video abnormal AUDIO ABNORMAL VIDEO ABNORMAL Check Audio jack. Check Video jack. YES (If OK) YES (If OK) Check MPEG_CLK Signal Refer to Video part. of MPEG part. YES (If OK) YES (If OK) Refer to Audio part. Refer to MPEG part.
  • Page 28 E. Picture abnormal PICTURE ABNORMAL Check the disc. Refer to Servo part If OK Check MPEG_CLK Signal of MPEG part YES (If OK) Check DSP YES (If OK) Check MPEG YES (If OK) Replace B/D F. Disc Error DISC ERROR Check Disc YES (If OK) Refer to Servo part...

  • Page 29: Mpeg Circuit

    3. MPEG Circuit Power is on Does Logo appear Check power & clock. on the screen? Does the Check CD/DVD DSP output moving picture of the DVD Disc Is MPEG data signal normal? play on the screen signal. normally? Check MPEG Decoder input signal.

  • Page 30: Front Circuit (Digitron & Key)

    4. Front Circuit (Digitron & key) START Power on. Is oscillation of Check Power. LED ON? X901 normal? Check waveform Is Digitron on normally? Replace IC902. of IC901 Pin 7. Do all the Is waveform of IC901 Check waveform buttons work Pin 21 normal? of IC901 Pin 14.

  • Page 31: Rf/Servo Circuit

    5. RF/Servo Circuit CHECK POINT(General) Does signal goes "High" to IC201 Pin186 when the power is on? Does signal pulse Check "2.µ-COM Part". input to IC201 Pins 53, 54 when the power is on? Does Does Replace X201 or IC206 TTL pulse output to 33.8688MHz clock input IC201 Pin 156?
  • Page 32 No disc .Power on Check loading Part. Push Pick-up to inner track to Does tray open or close? the end by hand. Does DECK assembly is defective. PMD03 Pin 10 change (Limit sw) high to low? Pressing the open/close key repeatedly, check the voltage of IC2M1 check µ-COM Part.
  • Page 33 DISC IN OPEN/CLOSE Fig.3. FOCUS ERROR waveform Check Check IC2A1 Pins 47,50,51,52 the focus error moving the FOCUS ON? lens up and down. in DVD Mode (IC2A1 Pin 39) IC201 no output : Pick-up is defective. Does the TTL level change at IC201 Replace IC201.
  • Page 34 CHECK A Fig.5. RF waveform Check RF Eye-Pattern. Check IC2A1 Pin 3. No signal: Pick-up is defective RF : 1.5-1.6V(TP2A0) Does the sawtooth waveform emit Is the eye-pattern vivid? Does the 1.6V emit? Replace IC2A1. at IC2A1 Pin 36? Replace IC201. Check IC201 Pin84.
  • Page 35 6. KARAOKE Circuit (KARAOKE MODEL ONLY) Start Insert the Mic jack Is the Mic signal at the IC802 pin1. Is the Mic signal at the IC802 Pin 2. Does the signal change Replace IC801. Replace VR803. at the IC802 Pin1 if adjusting the VR803 (Echo VR)? Is the Mic signal at the IC801 Pin 3, 7 normal?

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