LG DKS-5500 Service Manual
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LG DKS-5500 Service Manual

Dvd karaoke system
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DVD KARAOKE SYSTEM
SERVICE MANUAL
MODEL: DKS-5500/DKS-5600
2005

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Summary of Contents for LG DKS-5500

  • Page 1 DVD KARAOKE SYSTEM SERVICE MANUAL MODEL: DKS-5500/DKS-5600 2005...
  • Page 2 [CONTENTS] ❍ SECTION 1. GENERAL • SERVICING PRECAUTIONS ..........1-2 •...

  • Page 3: Section 1. General

    SECTION 1. GENERAL ❏ SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2.

  • Page 4: Notes Regarding Compact Disc Player Repairs

    NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

  • Page 5: Esd Precautions

    ❏ ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD 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.

  • Page 6: Specifications

    ❏ SPECIFICATIONS - 1-5 -...
  • Page 7 - 1-6 -...

  • Page 8: Section 2. Electrical

    SECTION 2. ELECTRICAL ❏ ELECTRICAL TROUBLESHOOTING GUIDE POWER Check flow No VF+ No 5V_A. Is 5.2VA section working? Is 5.2VA section working? Is 5.2V present at Check F102 No 5.2VA emitter of Q107? Replace Q107. Replace D109. Check F101 Is there a DC voltage Replace R101.
  • Page 9 Check the I s Signal of IC601(2-CH IC) Check the IC501 Check the L, R of IC601 Check the output signal of IC601 Check the L, R Output of JK601. Check the IC602 IC901 U-COM IC TROUBLESHHOTING Check the +5V of IC901 PIN 5, 10, 15, 17 Check the 5.2VA of CN901 PIN16...
  • Page 10 1. Power check flow - 2-3 -...
  • Page 11 2. Test & debug flow - 2-4 -...
  • Page 12 - 2-5 -...
  • Page 13 - 2-6 -...
  • Page 14 - 2-7 -...
  • Page 15 - 2-8 -...

  • Page 16: System Block Diagram

    ❏ BLOCK DIAGRAM • SYSTEM BLOCK DIAGRAM - 2-9 -...
  • Page 17 • MEMORY & HOST I/F BLOCK DIAGRAM - 2-10 -...
  • Page 18 • SERVO & MOTOR BLOCK DIAGRAM - 2-11 -...
  • Page 19 • A/V SYSTEM BLOCK DIAGRAM - 2-12 -...

  • Page 20: Mpeg Schematic Diagram

    ❏ SCHEMATIC DIAGRAMS 1. MPEG SCHEMATIC DIAGRAM Video signal not oppeared System not working or scream is abnormal 27MHz Signal not oppeared 2-13 2-14...

  • Page 21: Rf & Servo Schematic Diagram

    2. RF & SERVO SCHEMATIC DIAGRAM TE, FE, RF Signal isn’t appear or bad Loading not move CD/DVD LD will not on Spindle not move Focus, Tacking, SLED will not move 2-15 2-16...
  • Page 22 3. AV JACK SCHEMATIC DIAGRAM 2CH Aduio out bad Video Signal CVBS Video Signal Y 2CH Aduio out bad Video Signal color 2cn Audio 2-17 2-18...
  • Page 23 4. MIC SCHEMATIC DIAGRAM 2-19 2-20...
  • Page 24 5. FRONT TIMER SCHEMATIC DIAGRAM 2-21 2-22...

  • Page 25: Smps Schematic Diagram

    6. SMPS SCHEMATIC DIAGRAM VF(+) Power Dead F102 is defective VF(-) Power Dead ZD101 is defective 12V Power dead IC103 is defectuve 8V Power Dead IC105 is defective 3.3V Power Dead IC106 is defective Power Dead IC101 is defective 5V Power Dead Q107 is defective 2-23 2-24...

  • Page 26: Printed Circuit Diagram

    ❏ PRINTED CIRCUIT DIAGRAM • FRONT P.C BOARD DIAGRAM (SOLDER SIDE) • FRONT P.C BOARD DIAGRAM (COMPONENT SIDE) 2-25 2-26...
  • Page 27 • KEY P.C BOARD DIAGRAM (SOLDER SIDE) • KEY P.C BOARD DIAGRAM (COMPONENT SIDE) 2-27 2-28...
  • Page 28 • MPEG P.C BOARD DIAGRAM 2-29 2-30...
  • Page 29 • MPEG P.C BOARD DIAGRAM 2-31 2-32...
  • Page 30 • MIC P.C BOARD DIAGRAM 2-33 2-34...

  • Page 31: Smps P.c Board Diagram

    • SMPS P.C BOARD DIAGRAM 2-35 2-36...

  • Page 32: Section 3. Exploded Views

    SECTION 3. EXPLODED VIEWS • CABINET & MAIN FRAME SECTION CAUTION Exposed blade will cause severe injury.
  • Page 33 • Deck Mechanism Exploded View 024A LOCA. NO. PART NO. DESCRIPTION SPECIFICATION 6721RJ0372E DECK ASSEMBLY,VIDEO DECK/MECHA DP-7 (43MM)-ESS-MIT 024B 4861R-0016B CLAMP ASSEMBLY DISC DP7 - SH 3041R-M009D BASE ASSEMBLY MAIN DP-7 (43) HZ 3041R-M002M BASE ASSEMBLY SLED DP-7 (MIT VA9)-ESS-HZ 024A 3300R-0547A PLATE...

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Dks-5600

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