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LG DP170 Service Manual

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Av. Sor Juana lnés de la Cruz No 555
Col. San Lorenzo
Tlalnepantla, Estado de México CP 54033
Tel. 321 19 00 Fax. 5 657549
Lada sin costo 01 800 50 481 00
P/NO : AFN30347573
Printed in Korea
MAY, 2006
DVD PORTÁTIL
MANUAL DE SERVICIO
MODELO : DP170
PRECAUCIÓN
ANTES DE UTILIZAR LA UNIDAD, LEA LAS "PRECAUCIONES DE SEGURIDAD"
EN ESTE MANUAL.

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  • Page 1 DVD PORTÁTIL MANUAL DE SERVICIO MODELO : DP170 Av. Sor Juana lnés de la Cruz No 555 Col. San Lorenzo Tlalnepantla, Estado de México CP 54033 Tel. 321 19 00 Fax. 5 657549 PRECAUCIÓN Lada sin costo 01 800 50 481 00 ANTES DE UTILIZAR LA UNIDAD, LEA LAS "PRECAUCIONES DE SEGURIDAD"...
  • Page 2 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..EXPLODED VIEWS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...
  • Page 3 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ..... 1-3 SERVICING PRECAUTIONS ....................1-4 SPECIFICATIONS ........................1-5...
  • Page 4 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 5 SERVICING PRECAUTIONS CAUTION : Before servicing the PORTABLE DVD covered Electrostatically Sensitive (ES) Devices by this service data and its supplements and addends, read Some semiconductor (solid state) devices can be damaged and follow the SAFETY PRECAUTIONS. NOTE : if unfore- easily by static electricity.
  • Page 6 SPECIFICATIONS [DVD player] Power supply DC 9.5V (AC adapter terminal), DC 7.4V (Battery) Power consumption 12 W with battery Weight 12.6 ibs (0.66kg)(without battery pack) External dimensions(W X D X H) (186 X 150 X 25mm) Signal system NTSC Laser Semiconductor laser, wavelength 650 nm (DVD), 780nm(CD) Frequency range (audio)
  • Page 7 SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS .............................2-2 1. CABINET AND MAIN FRAME SECTION ....................2-2 2. PACKING ACCESSORY SECTION......................2-3...
  • Page 8 EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION...
  • Page 9 2. PACKING ACCESSORY SECTION 834 CABLE, CIJAR JACK 806 PLUG ASS'Y 833 ADAPTER 900 REMOTE CONTROL 801 OWNER'S MANUAL 808 BATTERY 802A BOX INNER 804 PACKING SHEET 802 BOX CARTON 803 PACKING...

  • Page 10: Table Of Contents

    SECTION 3 ELECTRICAL CONTENTS LCD PART ........................3-2 LCD TROUBLE SHOOTING GUIDE ..............3-3 LCD BLOCK DIAGRAM ..................3-5 LCD CIRCUIT DIAGRAMS ..................3-7 LCD PRINTED CIRCUIT DIAGRAMS ..............3-9 MAIN PART ......................3-11 MAIN ELECTRICAL TROUBLE SHOOTING GUIDE...........3-11 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING....3-19 MAIN BLOCK DIAGRAMS ...................3-28 MAIN CIRCUIT DIAGRAMS .................3-30 MAIN PRINTED CIRCUIT DIAGRAMS ..............3-56...

  • Page 11: Lcd Part

    LCD PART 1) Power measuring Measure each power after power supply. C83(-) : -14.5V, C82(+) : +15V,C100 : +7.5V,C97(+) : +5V,C43(+) : 3.3V 2) VCOM waveform adjustment Adjust the VCOM level while changing the VR1 as below waveform by using the scope in the C84.

  • Page 12: Lcd Trouble Shooting Guide

    LCD TROUBLE SHOOTING GUIDE Appear shadow form interference in black background DESPLAY CONDITION? INVERTOR ABNORMAL There is only bring light.(LCD B/D abnormal) Fuse Replace FUSE NORMAL? IC(U1) Check and Replace IC(U1) NORMAL OPERAE D2 ,D3 ,D8 Check 7.5V,15V,-14.5V NORMAL? Main B/D on located +5V NORMAL? IC(U6) Check and Replace A/V IN S/W Check...
  • Page 13 LCD MODE CONT SIGNAL? MAIN B/D Check ALL “LOW”(MORMAL CONDITION)? TFT LCD PRESSURE VOLTAGE? Power source and D2,D3,U4 Check +15V,- 14.5V,+5V Replace TFT LCD NORMAL? Readjust as adjustement standard COLOR ADJUSTING NORMAL? Replace and Reassemble EACH CONNECTOR? Replace...

  • Page 15: Lcd Block Diagram

    LCD BLOCK DIAGRAM TERAMINS T100 TFT LCD 7" WIDE VCOM 15V -14.5V 7.5V 5V INVERTER DC-DC CONV CVBS...

  • Page 16: Lcd Circuit Diagrams

    LCD CIRCUIT DIAGRAMS VDD22 47nF L1 FB AVDD33 VDD33 VDD22 +7.5V BIAS 2.7uH VDD33 R2 20K 2.7uH 680pF 330pF 0.1uF 0.1uF 100uF/6.3V 47uF/10V 47nF 4.7K 4.7K + C9 AC0/ACB0 AC1/ACB1 10uF/10V 2.7uH 10uF/10V AC2/ACB2 VDT0 CVBS0/AY0 VDT1 390pF 560pF CVBS1/AY1 VDT2 CVBS2/AY2 VDT3...

  • Page 17: Lcd Printed Circuit Diagrams

    LCD PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C. BOARD (TOP VIEW) ( TOP VIEW ) ( BOTTOM VIEW ) 3-10...

  • Page 19: Main Part

    MAIN PART MAIN ELECTRICAL TROUBLE SHOOTING GUIDE 1. Power (DC-DC Converter) Circuit NO POWER ON NO POWER ON by by ADAPTOR BATTERY Is ADAPTOR OUT Replace ADAPTOR Is BATTERY OK? Replace BATTERY 9.5V. Is1D3 OK. Replace 1D3 NO LCD NO +1.8V NO +3.3V NO +5V POWER...
  • Page 20 B. AUDIO OUT ABNORMAL C.VIDEO OUT ABNORMAL AUDIO OUT VIDEO OUT ABNORMAL ABNORMAL Check Audio Jack & Check Video Jack & Mode Mode Check Video signals Check +9V from MPEG Check Signals from Check IC(8U1) MPEG Replace IC(4U3) Check LC Filter D.
  • Page 21 F. PICTURE ABNORMAL G. DISC ERROR PICTURE ABNORMAL DISC ERROR Check the disc. Check Disc YES(If OK) Refer to Servo part Refer to Servo part If OK YES(If OK) Check MPEG_CLK Replace B/D Signal of MPEG part YES(If OK) Check MPEG (IC 2U1) YES(If OK) Replace B/D H.
  • Page 22 2. MPEG Circuit Power is on Does Logo appear Check power & clock. on the screen? Does the Check CD/DVD DSP output Video of the DVD Disc Is MPEG data signal normal? signal. play properly? Check MPEG Decoder input signal. Check CD/DVD DSP output Is error signal normal? signal.
  • Page 23 3. RF/Servo Circuit Put disc in. Laser off Proper RFL signal on Check the related circuit on Disc ID is correct? MT1389? MT1389 RFL signal . Check the RFL connection between 2J3 and MT1389. Proper DMSO signal on Check DMSO related circuit Does spindle rotate.
  • Page 24 Proper signals on A, B, C, Check connections between Focus ON OK. D of MT1389 MT1389 and pick-up head. Proper FEO signal on Check the related circuit MT1389. on MT1389 FEO sugnal . Check IC(2U1) IC Proper FEO signal on Check the related circuit on Track On OK.
  • Page 25 Check connection between Normal Audio output Audio DAC received correct MT1389 & Audio DAC. (Check when disc playback. data stream. VRST#, ACLK, ABCK, ASDAT3) Check the related circuit of Normal Audio DAC out. (4U3) Audio DAC. Check Audio filter, amplify, mute circuit.
  • Page 26 * Chargeing Circuit No turn on Red LED Is 8.4V of 9J1_Pin4 OK? Is 9U1 OK? Replace 9U1. Is IC9U4)OK? Replace IC(9U4). Is 9L1, OK? Replace 9L1. Is IC(9U3) OK? Replace IC(9U3). 3-18...

  • Page 27: Details And Waveforms On System Test And Debugging

    DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 1) MT1389 main clock is at 27MHz(X500) 3.8V, 27MHz FIG 1-1 2. SDRAM CLOCK 1) MT1389 main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V (IC500 PIN 229, 228) FIG 2-1 3-19...
  • Page 28 3. DISC TYPE JUDGEMENT WAVEFORM F+(IC200 PIN 24) FE(IC500 PIN 31) RFL(IC500 PIN 6) FIG 3-1 F+(IC200 PIN 24) FE(IC500 PIN 31) RFL(IC500 PIN 6) FIG 3-2 3-20...
  • Page 29 F+(IC200 PIN 24) FE(IC500 PIN 31) RFL(IC500 PIN 6) FIG 3-3 F+(IC200 PIN 24) FE(IC500 PIN 31) RFL(IC500 PIN 6) FIG 3-4 3-21...
  • Page 30 4. FOCUS ON WAVEFORM FE(IC500 PIN 31) FOSO(IC200 PIN9) F+(IC200 PIN 24) F-(IC200 PIN 23) FIG 4-1 FE(IC500 PIN 31) FOSO(IC200 PIN9) F+(IC200 PIN 24) F-(IC200 PIN 23) FIG 4-2 3-22...
  • Page 31 5. 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 5-1 6. TRACKING CONTROL RELATED SIGNAL(System checking) TE(IC500 PIN 32) TRSO(IC200 PIN 8) T-(IC200 PIN 20) T+(IC200 PIN 19) FIG 6-1 3-23...
  • Page 32 TE(IC500 PIN 32) TRSO(IC200 PIN 8) T-(IC200 PIN 20) T+(IC200 PIN 19) FIG 6-2 7. RF WAVEFORM RFOP(2.3V/1.1V) (IC500 PIN 25) RFON(0.8V/2.0V) (IC500 PIN 26) FIG 7-1 3-24...
  • Page 33 8. MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF) (IC500 PIN 225) FIG 8-1 9. MT1389 VIDEO OUTPUT WAVEFORM 1) Full colorbar signal(CVBS) (IC604 PIN 23) FIG 9-1 3-25...
  • Page 34 2) Y (IC604 PIN 21) FIG 9-2 3) C (IC604 PIN 26) FIG 93 3-26...
  • Page 35 10. AUDIO OUTPUT FROM AUDIO DAC 1) Audio L/R (JK601 PIN 4,5) FIG 10-1 2) Audio related Signal ASDAT 0 ASDAT0(IC301 PIN 3) ABCK(IC301 PIN 4) ALRCK(IC5301 PIN 5) FIG 10-2 3-27...

  • Page 36: Main Block Diagrams

    MAIN BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM A,B,C,D,RFIP ,TNI,TPI MDI 1,SUBA,SUBB LD01,LD02,IOA,V20 V,HV+/-,W,HW+/- U,HU+/- FO+,FO-,TR+,TR- STEP1+/-,STEP2+/- DECK MECHANISM 3-28...
  • Page 37 2. POWER(DC-DC CONVERTER)BLOCK DIAGRAM DCPWR E+5V S+5V A+5V A-5V D+3.3V A+3.3V D+1.8V +15V -14.5V 7.5V U104 BD6111FV U105 RT9701 AAT1102 U101 U102 MP1410 MP1410 Q107 U701 U702 SI4435D Y SI4435D Y GT6312 CH_EN PWRCTL_3.3V PWRCTL_5V From AC Adapter 9.5v From BATTERY 7.6V To BATTERY 3-29...

  • Page 39: Main Circuit Diagrams

    MAIN CIRCUIT DIAGRAMS 1. MAIN POWER CIRCUIT DIAGRAM 1C10 9V_IN 9V_IN NAME TYPE DEVICE SS24 22uH VCC_5V 1TP1 BAT_OUT BAT_OUT 4,7,9 Digital 5V SUPPLY 1C3 0.22uF(224) 1CE1 DVD_5V DV33 Digital 3.3V MT1389E DVD_5V 0.22uF(224) 220uF/16V DV33 DV33 100K SD33 RFV33 Servo 3.3V MT1389E SD33...
  • Page 40 2. SERVO CIRCUIT DIAGRAM_1 2TP1 2TP2 2TP3 2TP4 100K JITFO 390pF JITFN 3.3UH C27MHz DACVDD3 DACVDD3 DV33 APLLVDD3 DV33 750K + 2C4 + 2C6 2200pF 22pF 22pF 0.1uF 0.1uF 0.1uF 100uF/6.3V 100uF/6.3V 680K ADIN FOSO TRSO 2R10 100uF/6.3V 10uF/25V FMSO 2R11 2C13 2TP5...
  • Page 41 3. SERVO CIRCUIT DIAGRAM_2 3CE1 1CE16 SD33 DQ[0..15] DQ[0..15] SD33 PCE# PCE# PRD# PRD# MA[0..11] MA[0..11] PWR# PWR# BA[0..1] BA[0..1] + 3CE1 DQM[0..1] DQM[0..1] 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF A[0..21] A[0..21] 0.1uF DCLK DCLK DV33 100uF/6.3V DCKE DCKE DV33 AD[0..7] AD[0..7]...
  • Page 42 4. AUDIO CIRCUIT DIAGRAM_1 4TP1 SPDIF Interface 4TP3 L_SPEAKER 4TP2 OPTICAL A-5V 4TP4 NC-0 4C18 220pF 4TP6 OPEN(104) 5.1k 4CE2 4U1A 4TP7 4TP5 DAC_ML 4CE1 10uF/25V 10uF/25V ML_IN/OUT MR_IN/OUT ML_OUT 4TP8 8.2k NJM4558 4R11 4.7K 4TP9 ASPDIF 4R10 SOP8 OPEN(180K) 100K MUTE Drive IC...
  • Page 43 5. AUDIO CIRCUIT DIAGRAM_2 AUDIO_5V 5CE1 22UF/16V 5R20 0.1UF SPL- SPL- SPL- Shutdown -OUT1 SPL- 5R18 SPL+ SPR- +OUT1 SPR- 5R3 10K L_HP_IN SPL+ Vin1 SPL+ 1UF/50V PT2303 5R9 100K SE/BTL SPR+ HP-IN SPR+ R_HP_IN AUDIO_5V Vin2 AUDIO_5V 1,4,8 PT2303 0.1uF 5R19 1UF/50V...
  • Page 44 6. MCU CIRCUIT DIAGRAM_1 6RN1 6RN2 1N4148 10Kx4 10Kx4 447_5V 6TP1 6RN3 10UF/25V 6L1 10uH 10Kx4 6CE1 VCC_5V BAT_OUT BAT_OUT 1,4,7,9 ESD(15pF) + 6CE2 EM7XP447SAM(SOP28) 4MHz VCC_3V3 10uF/25V VCC_3V3 /RESET VCC_5V VCC_5V OSCT OSCO 6R4 51 LCD_SCL 6TP2 AUDIO_5V AUDIO_5V 1,4,5,8 P7.7 6TP7...
  • Page 45 7. MCU CIRCUIT DIAGRAM_2 TFT Cover Limit LCD_5V Switch 7TP1 7TP3 7L1 FB/1206 LCD_5V 7TP2 BAT_OUT 447_5V + 7CE2 LCD_5V 0.1uF 47uF/25V 0.1uF LCD_SCL 7TP5 7TP4 7TP6 LCD_SDA CON3 LCD_5V 7TP7 47pF EEPROM 24C16 47pF 7TP8 SOP8 7TP9 ESD(15pF) 0.1uF OPEN(20K) LCD_CTRL 3904...
  • Page 46 8. FRONT MICOM CIRCUIT DIAGRAM_1 8TP1 FB 50 VIDEO IN/OUT AUDIO_5V 8C2 47pF 8CE1 ESD(15pF) 10uF/25V ESD(15pF) FSAV330 8TP2 8L2 1.8uH CVBS DVD_CVBS 8R3 0 8TP3 75 1% 4.7K 100pF CVBS_IN 100pF 22pF OPEN 8TP4 CTRL_IN/EXT AV_IN/OUT_DET 0=in,1= out 3906 AUDIO_5V 8CE2 8TP5...
  • Page 47 9. FRONT MICOM CIRCUIT DIAGRAM_2 9V_IN 9V_IN BAT_OUT BAT_OUT 1,2,3,4,5,6,7,8,9 GREEN GREEN 6 CHARGE_ENABLE CHARGE_ENABLE CON-12 15PF(ESD) 15PF(ESD) 15PF(ESD) 15PF(ESD) DVD_KEY1 DVD_KEY1 DVD_KEY2 DVD_KEY2 DVD_KEY3 DVD_KEY3 DVD_KEY4 DVD_KEY4 DVD_KEY5 DVD_KEY5 DVD_KEY6 DVD_KEY6 COVER_SWITCH 9RN1 33x4 CON14 1,2,3,4,5,6,7,9,10 15PF(ESD) 15PF(ESD) 15PF(ESD) 15PF(ESD) 15PF(ESD) 15PF(ESD)
  • Page 48 10. BATTERY CHARGE CIRCUIT DIAGRAM 9TP1 1N5822 9V_IN 9TP2 9TP3 1N5822 9TP4 9CE1 100UH 9TP5 3904 1N4148 3904 9CE2 47UF/25V 9CE3 9TP6 9TP7 FDS4435 9TP8 1N5822 SAMI VREF 47UF/16V (NC)100U/16V 9CE4 9R10 9R11 9R12 3.6K SAMU 150K(1%) 9R13 9R14 9R15 VREF 3906 KA431(0.5%)
  • Page 49 11. KEY CIRCUIT DIAGRAM_1 NC/ESD(15pF) NC/ESD(15pF) SETUP NC/ESD(15pF) NC/ESD(15pF) DVD_KEY1 DVD_KEY3 NC/ESD(15pF) DVD_KEY2 NC/ESD(15pF) DOWN DVD_KEY3 NC/ESD(15pF) NC/ESD(15pF) DVD_KEY4 DVD_KEY2 NC/ESD(15pF) DVD_KEY5 TITLE MENU ENTER NC/ESD(15pF) DVD_KEY6 COVER_SWITCH NC/ESD(15pF) DVD_KEY1 DVD_KEY AV_IN/OUT COLOR/BRIGHT RIGHT LEFT DVD_KEY1 DVD_KEY2 TP10 DVD_KEY3 DVD_KEY4 LCD_MODE DISPLAY POWER...
  • Page 50 12. KEY CIRCUIT DIAGRAM_2 PLAY NEXT PREC DVD_KEY2 DVD_KEY3 DVD_KEY4 DVD_KEY5 PAUSE/STOP CON8 DVD_KEY2 NC/ESD(15pF) DVD_KEY3 NC/ESD(15pF) DVD_KEY4 NC/ESD(15pF) DVD_KEY5 NC/ESD(15pF) NC/ESD(15pF) 3-52 3-53...

  • Page 51: Main Printed Circuit Diagrams

    MAIN PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C. BOARD (TOP VIEW) 3-54 3-55...
  • Page 52 2. MAIN P.C. BOARD (BOTTOM VIEW) 3-56 3-57...

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