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LG LX-D2560A Service Manual

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MINI HOME THEATER
SERVICE MANUAL
MODEL : LX-D2560A(LXS-D2560V)
LX-D2960A(LXS-D2960V)

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  • Page 1 MINI HOME THEATER SERVICE MANUAL MODEL : LX-D2560A(LXS-D2560V) LX-D2960A(LXS-D2960V)
  • Page 2 [CONTENTS] ❍ SECTION 1. GENERAL • SERVICING PRECAUTIONS ..........1-2 •...

  • Page 3: Servicing Precautions

    SECTION 1. GENERAL ❏ SERVICING PRECAUTIONS I 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 I 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 I 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: Specification

    Frequency Response 140 - 1800 Hz Front: 100 W + 100 W (4 Ω, THD 10 %) - LX-D2960A model Output Power Front: 50 W + 50 W (4 Ω, THD 10 %) - LX-D2560A model T.H.D 0.5 % Frequency Response...
  • Page 7 - 1-6 -...

  • Page 8: Cabinet And Main Frame Section

    SECTION 2. EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION NOTE) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

  • Page 9: Deck Mechanism Exploded View (5 Changer)

    2. DECK MECHANISM EXPLODED VIEW (5 CHANGER)

  • Page 10: Tape Deck Mechanism

    3. TAPE DECK MECHANISM...

  • Page 12: Speaker Exploded View

    4. SPEAKER EXPLODED VIEW A700 - 2-7 -...
  • Page 13 - 2-8 -...

  • Page 14: Electrical Troubleshooting Guide

    SECTION 3. ELECTRICAL SECTION ❏ ELECTRICAL TROUBLESHOOTING GUIDE I MICOM PART CHECK I Refer to SMPS Check P7904 6PIN P-SENS Troubleshooting Check power of both terminals of IC101 KIA7042 Check if IC101 KIA7042 input is over 5V. Check the related part of IC101 KIA7042 Check if output voltage Check IC100 78KO/KF2...
  • Page 15 I MICOM PART CHECK II Check P7904 5PIN 5.6V Refer to SMPS Troubleshooting Check power of both terminals of D101 1SR35 Check D101 1SR35 output is working on 5V Replace the Check the related part related parts Check Q101 EMITTER 5V and COLLECTOR 5V Check Q102 BASE PIN 0.6V HIGH...
  • Page 16 I IC103 KS4CD21CS CHECK Check IC100 78KOKF2 22,24 PIN Refer to MICOM 22 PIN DATA 22 PIN CLK Check MICOM power 5V Troubleshooting Check the related part Replace the related parts I FLD DISPLAY CHECK Check P7904 1,2,3 power. Refer to SMPS Troubleshooting F1+,F2- both terminals: over 3.7V Check power VKK: over...
  • Page 17 When 5V fails,check D3191SR35 input and output power Check IC100 © IC301 DATA communication Check the related part 75 PIN © 3PIN STB Replace the related part 76 PIN © 2PIN DO 77 PIN © 4PIN DI 78 PIN © 1PIN CLK IC100 75 PIN ©...
  • Page 18 I PWM MODULATION PART Refer to SMPS Check P7905 9PIN 3.3V Troubleshooting Check IC604 PS9829 VDD PIN power (3,10,22,29,39,47, 56,65,72,87,94) Check X601 2PIN 3 3V Check if X601 12.288MHz is working. Check the related part of X601 Replace the related Check IC604 PS9829 part 86 PIN CLK input...
  • Page 19 I POWER AMP PART CHECK P7905 3 PIN+12 13,14,15 PIN 32V Refer to SMPS Troubleshooting Check input power of eachIC700,701,702,703 34,29,26,21 PIN. Check input power of each IC 700,701,702,703 1,36,17,18,19 PIN +12V Check resistance power of each LINE IC700:R702,701,726,727,724 IC701:R730,729,750,753,752 IC702:R756,755,768,771,770 IC703:R774,773,794,797,796 Check PWM MODULATOR...
  • Page 20 I AUX FUNCTION Check if JK800 contacts with Check IC200 (BU4052) 4, 11PIN input waveform. Check IC200 (BU4052) 16PIN VDD, 8PIN VSS power. Check IC200 (BU4052) Check u-COM (IC301) 3, 13PIN output waveform. 83PIN, 84PIN communication. Replace the related parts Check IC801 (MC4580) 2, 6PIN input waveform.
  • Page 21 I TUNER FUNCTION CHECK Check TUNER module(TU601) is working. Check TUNER MODUEL power(Check 2PIN 9V) Check IC200(BU4052) 1, 12PIN input waveform. Check IC200(BU4052) 3,13PIN output waveform. Check IC601(BU 4502) 2, 15PIN Check 25 PIN:5.6V Check IC200(BU4052) 16PIN VDD,8PIN VSS power Check IC801(MC4580) 2,6PIN input waveform.
  • Page 22 I TAPE PLAY PART CHECK P2707:4 PIN © 12V Refer to SMPS Troubleshooting Check IC201 (HA12237)16 PIN 12V input. Check IC201: 5.26 PIN Signal Output. Check DECK HEAD input. Replace the HEAD WIRE and Mecha. Check DECK HEAD input IC201 32.39 PIN. Check the related part.
  • Page 23 I TAPE REC PART CHECK Check IC604 PS9829 Refer to PWM modulation #49,#52 PWM output. part. Check Q601 Collector waveform. Check P7207 #2,#4 output. Check Board to Board contact. Check P2707 #5,#7 input. Check IC203 MC4580 #1,#7. Check IC203 8 PIN +12V. Refer to SMPS Troubleshooting Check the related part.
  • Page 24 I SMPS POWER CIRCUIT *MAIN PART Check the fuse F901 Replace the fuse Check the DC V of C905. Check BD901,LF901,902 If DC V is over 400V Chcek the DC V Of C909,C903,C921 If DC V is Check IC901,902 Replace IC 901,902 in 14~19V and it is steady.
  • Page 25 *P-SENS PART Check the PIN6 OF P9702 Check power circuit If DC V is over5.6V Trouble shooting *VKK PART Check the PIN3 OF P9702 Check power circuit If DC V is over -28V ±2 Trouble shooting - 3-12 -...

  • Page 26: Internal Block Diagram Of Ics

    ❏ INTERNAL BLOCK DIAGRAM of ICs • UTC MC4580 PIN CONFIGURATION TEST CIRCUIT - 3-13 -...

  • Page 27: Block Diagram

    • NJM 2279 BLOCK DIAGRAM MUTE1 Vin1 20kΩ Driver AMP. 75Ω Vout1 Vin2 20kΩ 4.45kΩ 20kΩ 4.14kΩ AMP. Driver Vin3 75Ω Vout2 20kΩ 20kΩ 4.45kΩ 4.14kΩ MUTE2 GND1 GND2 • MBM29LV160TE BLOCK DIAGRAM - 3-14 -...
  • Page 28 • HY57V281620ETP FUNCTIONAL BLOCK DIAGRAM • FAN8082D Internal Block Diagram - 3-15 -...
  • Page 29 • BU2090 Block diagram - 3-16 -...
  • Page 30 • HA12237F BLOCK DIAGRAM - 3-17 -...
  • Page 31 • BA3308 / BA3308F BLOCK DIAGRAM BA3308 BA3308F - 3-18 -...
  • Page 32 • TAS5142 BLOCK DIAGRAM - 3-19 -...
  • Page 33 • HT1200-4 SYSTEM BLOCK DIAGRAM - 3-20 -...
  • Page 34 • HT1200-4 FUNCTIONAL BLOCK DIAGRAM - 3-21 -...
  • Page 35 • CS5340 BLOCK DIAGRAM • BU4052 BLOCK DIAGRAM - 3-22 -...
  • Page 36 • STR-S6757IF1905 BLOCK DIAGRAM • STR-A6200 BLOCK DIAGRAM - 3-23 -...
  • Page 37 - 3-24 -...

  • Page 38: Wiring Diagram

    ❏ WIRING DIAGRAM 3-25 3-26...

  • Page 39: Block Diagram

    ❏ BLOCK DIAGRAM OVERALL AV BLOCK DIAGRAM LC6324 DECK/AD 9.8304MHz MAIN BOARD AMP BOARD TAS5152_PDN MODE A.B VFD DATA.CLK HALF A.B SOL"A" 12.288 TAS5152_SD EXP CLK REC F.R SOL"B" DATA MOTER PS9829A HIGH/NO 9829_DAT AUDIO FL+/-, FR+/- DECK TAS5142 MICOM Power Amp MODUL RL+/-, RR+/-...

  • Page 40: Schematic Diagrams

    ❏ SCHEMATIC DIAGRAMS • MAIN SCHEMATIC DIAGRAM AUDIO VIDIO JACK A_MUTE PWM/DAC SPDIF OUT DECK MECHANISM SPDIF IN UART MICOM A,B,C,D,E,F,R CDMDI, DVDMDI P/UP CDDVDCT, VRDVD,VRD MMA[0..1MB]B[0..15] LDO1,LDO2 DSCK#,CKE,CSo#,RAS0 SDRAM CAS#,WE#,DQMX OPEN/CLOSE MPEG FOCUS/SLED MOTOR LA[0..21], LD[0..7] SLED±, F±,T± DRIVE SPINDLE/TACKING FLASH ESS6838...
  • Page 41 • µ-COM/INTERFACE/PWM SCHEMATIC DIAGRAM 3-31 3-32...

  • Page 42: Schematic Diagrams

    • 6CH_AMP SCHEMATIC DIAGRAM 3-33 3-34...
  • Page 43 • FRONT SCHEMATIC DIAGRAM 3-35 3-36...
  • Page 44 • SMPS SCHEMATIC DIAGRAM 3-37 3-38...
  • Page 45 • DECK SCHEMATIC DIAGRAM 3-39 3-40...

  • Page 46: Printed Circuit Diagrams

    ❏ PRINTED CIRCUIT DIAGRAMS • MAIN P.C. BOARD 3-41 3-42...
  • Page 47 • MAIN P.C. BOARD 3-43 3-44...
  • Page 48 • FRONT P.C. BOARD 3-45 3-46...
  • Page 49 • SMPS P.C. BOARD 3-47 3-48...
  • Page 50 • DECK P.C. BOARD 3-49 3-50...

  • Page 52: Dvd Electrical Troubleshootihg Guide

    SECTION 4. DVD PART ELECTRICAL ❏ DVD ELECTRICAL TROUBLESHOOTIHG GUIDE I POWER CHECK GUIDE Power ON Power ON PUSH KARAOKE DVD BUTTON Does DVD/CD Does AUX, FM 87.5 appear at FLD? appear at FLD? Does it Does DISK1 appear DVD ERROR at appear at FLD? FLD? Check...
  • Page 53 I TEST & DEBUG FLOW POWER ON Flash Check connection lines between Show LOGO? Memory operates FLASH &ES8381 or the FLASH access properly? time whether is suitable or not. Check connection lines between SDRAM works SDRAM (IC502)&ES8381 or the properly? SDRAM is damaged.
  • Page 54 Does the SLED move to Limit SW signal Check the MD inner side when it is at on P4407 is LOW? outer position? Check the related circuit of SLED SLED signal is OK? and Motor driver IC (IC401) Check the cable connection with MECHA.
  • Page 55 Check the laser power circuit between Laser turns DVDLD or CDLD ES8381 and power on when reading output properly? transistor. (Q405,Q406) disc? Collector Check the related circuit of laser voltage of power power transistor. transistor is ok? (Q405,Q406) Check cable connection between P4405 and pick-up head.
  • Page 56 Proper signal on Check the connections between Focus On OK? A,B,C,D from MD? P4405 and pick-up head. Check the related circuit of ES8381 Proper FOO signal FOCUS signal. on IC401? Check cable connection between P4405 and MD. Check the related circuit between Proper TRO signal Track On OK? IC401 and ES8381...
  • Page 57 All outputs Audio signal Check the connections between are Ok during playing data on P4703 is OK? ES8381 and P4703 DISK ? Check the MAIN PCB For example composite video , Picture Check the video mute TR (Q411), signal data on ES8381 Output of Video buffer IC (IC407)and is OK? ES8381 video signal data...
  • Page 58 I USB PART TURN ON USB “Searching ”or Check the POWER supply circuit. “USB ”Display (Check P5701) check Check the HRST#signal Check the USB PART and DVD PART line. Check the USB JACK POWER supply. Reading OK check (Check P4302) Check the USB DATA LINE.(P4302) Check the IC405 (UBI9021).
  • Page 59 WHEN POWER ON,RESET &DATA ETC WAVEFORM 1.RESET(DVD) 2.RX 3.TX 4.LCS3#(FLASH) Playing at USB function 1.HRST# 2.5V 3.D- 4.D+ - 4-8 -...
  • Page 60 OPEN/CLOSE WAVEFORM AT POWER ON 1.Limit SW 2.OPEN 3.CLOSE STARTING ACTION WAVEFORM IN MD DEVICE 1.SLO (from MPEG) 2.SLED- 3.SLED+ (At Power on ) - 4-9 -...
  • Page 61 FOCUS WAVEFORM (AT CD) 1.FDO 2.F+ 3.F- (INSERT CD ) FOCUS WAVEFORM (AT DVD) (INSERT DVD ) 1.FDO 2.F+ 3.F- - 4-10 -...
  • Page 62 AT POWER ON ,SPINDLE SIGNAL AT MD DECK 1.Spind 2.Spin+ 3.Spin- AT FIRST ACTION,FOCUS SIGNAL A,B,C,D - 4-11 -...
  • Page 63 TRACKING SIGNAL 1.Tro 2.Tr- 3.Tr+ RF WAVEFORM - 4-12 -...
  • Page 64 DISK TYPE JUGEMENT WAVEFORM (DVD) 1.F+ 2.FDO 3.SVRRF (CD) - 4-13 -...
  • Page 65 - 4-14 -...

  • Page 66: Dvd Schematic Diagrams

    ❏ DVD SCHEMATIC DIAGRAMS • MPEG SCHEMATIC DIAGRAM 4-15 4-16...
  • Page 67 • RF & SERVO SCHEMATIC DIAGRAM 4-17 4-18...
  • Page 68 • AV SCHEMATIC DIAGRAM 4-19 4-20...
  • Page 69 • USB/PC-LINK SCHEMATIC DIAGRAM 4-21 4-22...

  • Page 70: Dvd Printed Circuit Diagrams

    ❏ DVD PRINTED CIRCUIT DIAGRAMS • DVD MAIN P.C. BOARD 4-23 4-24...
  • Page 71 • DVD MAIN P.C. BOARD 4-25 4-26...

  • Page 72: Deck Mechanism Disassembly

    SECTION 5 MECHANISM OF DVD PART (5 CHANGER) ❏ DECK MECHANISM DISASSEMBLY 1. Disassembling of Traverse Ass’y Damper (4900RB0005A) Traverse Ass’y (6717R-D001B) 1) Release 4 Screws. 2) Lift up the Traverse Ass’y from the Mechanism Ass’y Mechanism Ass’y. In case of not coming out (4404R-D001B) easily to stuck to a both sides, pull Spring in direction of left/right side and lift it up.
  • Page 73 PWB PH Ass’y Wire PCB Ass’y (6871RZ0045A) Frame LG Ass’y 1) Release 4 Screws attached in Frame LG 2) Release the Wire of PWB PH Ass’y Ass’y soldered on the back side PCB Ass’y of Mechanism Ass’y, and then lift up the...
  • Page 74 (4260RZ0001C) Locking Tab Locking Tab 1) Unlock the two parts of Locking Tab on the 1) Unlock the Frame LG locking Tab and lift it Frame LG and seperate. up as shown in the picture. 7. Disassembling of Drawer Ass’y...
  • Page 75 8. Disassembling of Carriage 9. Disassembling of Belt Belt (4400RZ0002A) Drawer L (3210RZH001A) Carriage (3390RZ0002A~E) Drawer R (3210RZH002A) 1) Extract 5 Carriages in the direction of arrow 1) After seperating of the Drawer, remove the from the Drawer. Belt from the top of the Chassis. 10.
  • Page 76 PCB Ass’y (6871RZ0045C) 3) Release the Screw which fixes the Switch to 4) Remove the solder on the Motor and the the Chassis and then seperate the PCB SW PCB Ass’y. Ass’y. 5) Lift up the PCB Ass’y. 11. Disassembling of Motor 12.

  • Page 78: Exploded View

    ❏ EXPLODED VIEW • DECK MECHANISM EXPLODED VIEW...

This manual is also suitable for:

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