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LG DVP7772 Manual

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CONTENTS
SECTION 1 . . . . SUMMARY
SECTION 2 . . . . EXPLODED VIEWS
SECTION 3 . . . . ELECTRICAL
SECTION 4 . . . . REPLACEMENT PARTS LIST
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Summary of Contents for LG DVP7772

  • Page 1 CONTENTS SECTION 1 ..SUMMARY SECTION 2 ..EXPLODED VIEWS SECTION 3 ..ELECTRICAL SECTION 4 ..REPLACEMENT PARTS LIST...
  • Page 2 SECTION 1 SUMMARY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ..... 1-3 SERVICING PRECAUTIONS ....................1-4 SPECIFICATIONS ........................1-5...
  • Page 3 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 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 5 SPECIFICATIONS [DVD player] Power supply DC 9.8 V (AC adapter terminal), DC 7.4 V (Battery) Power consumption 25 W with battery Weight 12.6 lbs (0.66 kg) (without battery pack) External dimensions (W X D X H) 7.3 x 5.9 x 1.0 inches (186 x 150 x 25 mm) Signal system Laser Semiconductor laser, wavelength 650 nm (DVD),...
  • Page 6 SECTION 2 EXPLODED VIEWS CONTENTS EXPLODED VIEWS ........................2-2 Cabinet and Main Frame Section ....................2-2 Deck Mechanism Section ......................2-3 Packing Accessory Section .......................2-4...

  • Page 7: Exploded Views

    EXPLODED VIEWS • Cabinet and Main Frame Section...

  • Page 8: Deck Mechanism Section

    • Deck Mechanism Section...

  • Page 9: Packing Accessory Section

    • Packing Accessory Section 831 ADAPTER DC DC 12 830 AC ADAPTER BATTERY 300 POWER CORD REMOCON 814 PLUG ASS’Y OWNER’S MANUAL R/C BATTERY PACKING SHEET PACKING PACKING BOX CARTONX OPTIONAL PARTS...
  • Page 10 SECTION 3 ELECTRICAL CONTENTS LCD PART ........................3-2 ELECTRICAL TROUBLE SHOOTING GUIDE ............3-16 BLCOK DIAGRAMS ....................3-25 CIRCUIT DIAGRAM ....................3-28 PRINTED CIRCUIT DIAGRAMS ................3-58...
  • Page 11 LCD PART 1) Power measuring Measure each power after power supply. CE809(+): -10V, CE812(+): +15V, C828: +7.5V, CE8F6: +5V, CE8H1: +9.8V 2) VCO frequency adjustment Change the VR805 when there is no signal (video signal off) and adjust to 29.1MHz(error: +/- 0.03MHz) with a frequency counter.
  • Page 12 4) Adjustment of screen center position Change and adjust the VR802 so that the middle vertical line between Green and magenta is located at the center of the LCD Panel on the Full color bar screen. Full color bar screen 5) Removal of horizontal line noise Remove a thick horizontal line noise while changing the VR803 and monitoring the logo screen.
  • Page 13 LCD TROUBLE SHOOTING GUIDE(1/2) appear shadow form interference in black background DESPLAY CONDITION? INVERTOR ABNORMAL There is only bright light.(LCD B/D abnormal) FUSE(F801)Normal? FUSE Replace IC8F1, IC8F2 Check and Replace Q8F1 Normal operate? T801, D8F1, D8F2, D8F3 Check 7.5V, 15V, -10V Normal? Main B/D on located +5V Normal? IC8F3 Check and Replace...
  • Page 14 LCD TROUBLE SHOOTING GUIDE(2/2) IC802 Replace IC802’s CLK and CONT signal? LCD MODE CONT signal? MAIN B/D Check ALL “LOW”(NORMAL condition) TFT LCD pressure voltage? Power source and D803, D804 Check +15V, -10V, +5V Replace TFT LCD Normal? Color Adjusting Normal? Readjust as adjustement standard.
  • Page 15 LCD BLOCK DIAGRAM...
  • Page 16 ELECTRICAL TROUBLE SHOOTING GUIDE 1. Power (DC-DC Converter) Circuit NO POWER ON NO POWER ON by ADAPTOR by BATTERY Is ADAPTOR Replace BATTERY Replace ADAPTOR Is BATTERY OK? OUT 9.8V? Replace F101 Is F101 OK? Replace Q102 Is Q102 OK? Replace LF101 Is LF101 OK? Replace D105...
  • Page 17 B. Audio Out abnormal C. Video Out abnormal VIDEO OUT ABNORMAL AUDIO OUT ABNORMAL Check Audio Jack & Check Video Jack & Mode Mode Check +5V , -5V Check Video signals from MPEG Check Signals from MPEG Check IC402 Replace IC301 Check LC Filter D.
  • Page 18 F. Picture abnormal G. Disc Error DISC ERROR PICTURE ABNORMAL Check Disc Check the disc. YES (If OK) Refer to Servo part Refer to Servo part YES (If OK) If OK Check MPEG_CLK Signal Replace B/D of MPEG part YES (If OK) Check MPEG (IC500) YES (If OK)
  • Page 19 2. 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 20 3. Front Circuit(Dogotrpm & Key) START Power on. when power S/W turn on, Check Power. LED ON? Is oscillation of X701 normal? Check waveform of Check waveform Is Digitron on normally? Replace IC702. IC701 Pin12, 16, 18, 19? of IC701 Pin 25.
  • Page 21 4. RF/Servo Circuit Laser off Put disc in? Check the related circuit Proper RFL signal Disc ID is correct? on MT1389 RFL signal . on MT1389? Check the RFL connection between CON200 and MT1389. Proper Check DMSO related DMSO signal on Does spindle rotate? circuit on MT1389.
  • Page 22 Proper Check connections between signals on A, B, C, Focus ON OK? MT1389 and pick-up head. D of MT1389 Check the related circuit Proper FEO signal on MT1389 FEO sugnal . on MT1389? Check IC500 IC Check the related Proper FEO signal Track On OK? circuit on MT1389 on MT1389?
  • Page 23 Audio Normal DAC received Check connection between MT1389 Audio output & Audio DAC. (Check VRST#, ACLK, correct data stream? when disc playback? ABCK, ASDAT3) Normal Check the related circuit of Audio DAC Audio DAC. (Check Audio out? (IC601) out Pin 14, 15,18,19) Check Audio filter, amplify, mute circuit.
  • Page 24 * Chargeing Circuit No turn on Red LED Is 8.4V of J601_Pin1 OK? Is Q603 OK? Replace Q603. Is Q602 OK? Replace Q602. Is L601, C613, C614, Replace L601, C613, R610 OK? C614, R610? Is Q601 OK? Replace Q601 Is IC601 OK? Replace IC601 3-24...
  • Page 25 BLOCK DIAGRAMS 1. OVERALL BLOCK DIAGRAM LIMIT FO+,FO-,TR+,TR- V,W,U, HW+/-,HV+/-,HU+/-,H- STEP1+/-,STEP2+/- DECK MECHANISM 3-25...
  • Page 26 2. POWER(DC-DC CONVERTER)BLOCK DIAGRAM 3-26...
  • Page 27 3. AUDIO/VIDEO BLOCK DIAGRAM 3-27...
  • Page 28 LCD CIRCUIT DIAGRAM LCD1 CIRCUIT DIAGRAM...
  • Page 29 LCD2 CIRCUIT DIAGRAM 3-10...
  • Page 30 LCD3 CIRCUIT DIAGRAM SR14121A 3-11 3-12...
  • Page 31 LCD VOLTAGE SHEET IC801 IR3Y29BM PIN NO VOLT WAVEFORM PIN NO VOLT WAVEFORM Y signal(0.5) HD(0-3.3) Y signal(0.5) C signal(0.5) VD(0-3.3) HQ-OUT CLK(0.4) 0-2.8 CLK(0.4) 0-2.6 0-2.6 0-2.6 R(0.6-4.4) 0-2.6 G(0.6-4.4) 0-2.6 0-2.6 B(0.6-4.4) 0-2.6 CLK 0-2.6 CLK 0-2.6 CLK 0-2.6 HQ(0-2.6) HQ(0-2.6) SYNC(0-3.4)
  • Page 32 LCD P.C. BOARD LOCATION GUIDE LOCATION GUIDE 3-14 3-15...
  • Page 34 CIRCUIT DIAGRAMS 1. MAIN POWER CIRCUIT DIAGRAM POWER INPUT DC+9.8V GT119 TP100 LF101 TP104 J101 F101 ACM0908-801-2P 0433-003A PWR_SRC D101 C102 UDZS16B C140 0.1U BAT7.6V 22U/16V C101 D103 0.1U Q102 is defective RB081L-20 D105 HEC3110 D102 RB081L-20 R101 UDZS16B POWERJACK E+5V is bad GT120 TP107...
  • Page 35 2. SERVO CIRCUIT DIAGRAM R206 R208 100K A+5V The countermeasure of static electricity Q202 R209 LD PART KTC3875 R233 L201 10uH D202 CD_LD STZ6.8N(OPEN) R207 Q203 100K LDO1 2SB1132 CON200 Q200 D203 Q201 D201 2SK3018 STZ6.8N(OPEN) 2SK3018 STZ6.8N(OPEN) GT223 R204 GT222 C210 22U/10V...
  • Page 36 3. MAIN(MT1389) CIRCUIT DIAGRAM TP630 VREFN IOWR# TRAY OPEN SWITCH TP631 C563 C565 IOCE# C564 390P OPEN 0.1U Crystal TP642 JITFO JITFN TP643 VREFP No power on R536 SW501 750K TRAY_OPEN_SW R513 VFD_TXD 100K GT500 TRAY_OPEN_SW /M_RESET /M_RESET6 TP632 AUDIO_CD_CON AUDIO_CD_CON 6 C568 TP633...
  • Page 37 4. AUDIO CIRCUIT DIAGRAM A_VIDEO_IO_CON A_AUDIO_CD_CON Q318 Q329 Q323 E+5V KTC3875 KTC3875 KTC3875 A+5V TP305 R390 TP307 TP309 Q316 Q317 KTA1504S KRA103S Q325 TP304 KTC3875 D310 R302 Q327 R388 KRA103S 4.7K TP306 TP308 Q320 TP302 TP303 KTC3875 Q324 R387 Q315 TP310 R391 KTC3875...
  • Page 38 5. VIDEO CIRCUIT DIAGRAM R453 Q409 KTC3875 VIDEO_IO_CON3,6 /V_JACK_IN 3 C438 R408 TP438 0.1U TP435 TP417 R440 TP416 D+3.3V Q408 TP418 KTC3875 R404 CE411 100U/10V TP436 TP401 VIN1 Q415 Q404 R415 A+5V KTC3875 KTA1504S TP439 R406 VIN2 CE402 TP420 /V_MUTE 3 100U/6.3V L442 VIN1...
  • Page 39 6. FRONT MICOM CIRCUIT DIAGRAM SL700 TP708 VFD_RXD VFD_RXD 3 FRONT DOWNLOAD CON702 FRONTDOWN-8-0.5 GT701 GT702 A+5V GT703 GT704 E+5V L704 GT705 10UH E+5V IC703 C713 0.1U Signal Power Up (3.3V=>5V) RESET PART TP790 TP795 TP799 TP794 A_SP_AMP_EN SP_AMP_EN3 TP798 TP793 FM_MUTE MUTE_FM3...
  • Page 40 7. LCD POWER CIRCUIT DIAGRAM No Display F801 LCDPWR 0433-750mA L8F1 TP813 100UH/0.45A C8K8 C8F11 0.1U 22U/16V R8F2 TP801 D8F1 R8F5 R8F6 100K CRS02 L8F2 TP814 TP817 33UH -15V C8F1 0.47U/25V TP803 TP802 C8F32 C8G11 C8G1 C8K9 22U/25V 22U/25V 0.1U 0.1U R8F3 C8F31...
  • Page 41 8. BATTERY CHARGE CIRCUIT DIAGRAM Q601 D604 L601 TP655 TP657 TP658 RB050L-40 TP656 10UH/3A DC+9.8V R610 0.025/1W SI4435DY TP672 BAT7.6V TP669 Q602 TP659 SI4435DY R611 10K(1%) C607 IC601 0.47U/25V -INC2 +INC2 TP670 OUTC2 Q603 +INE2 TP663 KRC103S -INE2 VCC(O) I_SENSE TP668 C605 0.1U...
  • Page 42 9. KEY CIRCUIT DIAGRAM E+5V CON901 CON902 CON_KEY12 CON_KEY14 R901 100K TP901 Q902 KTA1504S TP904 R904 TP906 TP909 R909 TP910 R910 TP911 R922 R923 TP907 R907 TP908 R908 R906 1.3K 4.7K 9.1K 2.7K 2.7K TP902 TP905 R902 R903 C902 220K 0.1U Q901 KTC3875...
  • Page 43 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1. SYSTEM 27MHz CLOCK,RESET,FLASH R/W SIGNAL 2. SDRAM CLOCK 1) MT1389 main clock is at 27MHz(X500) 1) MT1389 main clock is at 27MHz(X501) DCLK = 93MHz, Vp-p=2.2, Vmax=2.7V 3.8V, 27MHz (IC500 PIN 229, 228) FIG 2-1 FIG 1-1 3.
  • Page 44 F+(IC200 PIN 24) F+(IC200 PIN 24) FE(IC500 PIN 31) FE(IC500 PIN 31) RFL(IC500 PIN 6) RFL(IC500 PIN 6) FIG 7-2 (DVD) FIG 7-4 (CD) 4. FOCUS ON WAVEFORM F+(IC200 PIN 24) FE(IC500 PIN 31) FOSO(IC200 PIN9) FE(IC500 PIN 31) F+(IC200 PIN 24) RFL(IC500 PIN 6) F-(IC200 PIN 23) FIG 7-3 (CD)
  • Page 45 6. TRACKING CONTROL RELATED SIGNAL(System checking) TE(IC500 PIN 32) FE(IC500 PIN 31) TRSO(IC200 PIN 8) FOSO(IC200 PIN9) F+(IC200 PIN 24) T-(IC200 PIN 20) F-(IC200 PIN 23) T+(IC200 PIN 19) FIG 8-2 (CD) FIG 10-1(DVD) 5. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) TE(IC500 PIN 32) DMSO(1.4V/1.8V) (IC501 PIN 18)
  • Page 46 9. MT1389 VIDEO OUTPUT WAVEFORM 7. RF WAVEFORM 1) Full colorbar signal(CVBS) RFOP(2.3V/1.1V) (IC500 PIN 25) (IC604 PIN 23) RFON(0.8V/2.0V) (IC500 PIN 26) FIG 11-1 FIG 13-1 8. MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT (ASPDIF) 2) Y (IC500 PIN 225) (IC604 PIN 21) FIG 13-2 FIG 12-1...
  • Page 47 3) C 2) Audio related Signal ASDAT 0 ASDAT0(IC301 PIN 3) ABCK(IC301 PIN 4) (IC604 PIN 26) ALRCK(IC5301 PIN 5) FIG 13-3 FIG 14-2 10. AUDIO OUTPUT FROM AUDIO DAC 1) Audio L/R (JK601 PIN 4,5) FIG 14-1 3-54 3-55...
  • Page 48 CIRCUIT VOLTAGE CHART MODE 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 STOP PLAY PIN NO. PIN NO. PIN NO. PIN NO. PIN NO.
  • Page 49 MODE MODE MODE MODE MODE MODE STOP PLAY STOP PLAY 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. Q317 Q319 Q305...
  • Page 50 PRINTED CIRCUIT DIAGRAMS 1. MAIN P.C. BOARD LOCATION GUIDE LOCATION GUIDE 3-60 3-61...
  • Page 51 2. KEY P. C. BOARD LOCATION GUIDE LOCATION GUIDE 3-62 3-63...