Daewoo OSDPC78001 Service Manual
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Daewoo OSDPC78001 Service Manual

Daewoo OSDPC78001 Service Manual

Lcd color monitor & dvd player
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OSDPC78001
(7 Inch) LCD Color Monitor &
DVD Player
DPC-7800NT (2708ED)
DEC. 2006

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Summary of Contents for Daewoo OSDPC78001

  • Page 1 OSDPC78001 (7 Inch) LCD Color Monitor & DVD Player DPC-7800NT (2708ED) DEC. 2006...

  • Page 2: Table Of Contents

    (7 Inch) LCD Color Monitor & DVD Player MODEL : DPC-7800NT （2708ED） CONTENTS ---------------- Specification ............…..........…………….….. Block Diagram ........…..............…………….….. General Alignment Instruction ...............……….……..… Troubleshooting ...................…...……………...….. Printed Circuit Board 9~13 ..................……………...…... IC Block Diagram & Description 14~31 .................…………..….. Explode View ......................…………..…. Schematic Diagram 33~42 ..................……………..…..

  • Page 3: Specification

    SPECIFICATION Description Condition Unit Limit Nominal Headphone Output 1kHz 0dB 3±2 Headphone Noise No Signal <1mV <1mV 1kHz 0dB 600±100 SPK MAX Output(DVD) 1kHz 0dB 600±100 1kHz 0dB 600±100 SPK MAX Output(AV 1kHz 0dB 600±100 ≤0.3 LINE OUT Distortion 1kHz 0dB/8ohm REF THD 1kHz 0dB ≥50...
  • Page 4 Description Condition Unit Limit Nominal Video Signal Level Vp-p 0.7±0.1 75% color bar/75ohm SYNC Level Vp-p 0.3±0.1 Video out level Vp-p 1.0±0.2 Video out level(Unload) 75% color bar Vp-p 2.0±0.2 1kHz/0dB/10K 0.6±0.2 Audio out level 1kHz/0dB/10K 2+0/-0.6 ≥2.8 LINE OUT LEVEL 1kHz/0dB/10K ≤±3 20Hz...

  • Page 5: Block Diagram

    BLOCK DIAGRAM...

  • Page 7: General Alignment Instruction

    GENERAL ALIGNMENT INSTRUCTION The Main PCB of Monitor Modification: 1. Input voltage is 6.8V-16V, input signal is test circuit BY 5418. 2. Adjust VR1 to get horizontal phase shift and test point: 28.9MHz 3. Adjust VRB4 to get good performance.. The main PCB of DVD Modification: 1.

  • Page 8: Troubleshooting

    TROUBLESHOOTING SYMPTOM CAUSE REMEDY LCD MONITOR PART & Defective IC T110 (U301). & Replace IC T110 (U301). 1) Picture distortion & Defective IC201 (D3031). & Replace IC201 (D3031). 2) No Picture & Defective IC1 (CSC3414A). & Replace IC1 (CSC3414A). 3) No Picture, Picture no Good &...
  • Page 9 SYMPTOM CAUSE REMEDY DVD PART & Power source is not correct. & Replace power source. 1) No Power & Charge the position of positive The positive and negative does not match the unit. and negative. & Power button defective. & Replace power button. &...

  • Page 10: Printed Circuit Board

    PRINTED CIRCUIT BOARD Monitor Main PCB Top View Bottom View...
  • Page 11 Charger Circuit PCB Top View Bottom View -10-...
  • Page 12 DVD KEY PCB-1 DVD KEY PCB-2 -11-...
  • Page 13 DVD Main PCB TOP View -12-...
  • Page 14 DVD Main PCB Bottom View -13-...

  • Page 15: Ic Block Diagram & Description

    IC BLOCK DIAGRAM & DESCRIPTION IC201 D3031 -14-...
  • Page 16 IC BLOCK DIAGRAM & DESCRIPTION IC201 D3031 B OUT SYNC OUT B DC DET SYNC SEP G OUT EXT B IN G DC DET EXT G IN R OUT EXT R IN R DC DFT CONTRAST Vcc1 F AD J V C0 OUT CLAMP APC FILTER...
  • Page 17 IC BLOCK DIAGRAM & DESCRIPTION Q10 SS9969 -16-...
  • Page 18 IC BLOCK DIAGRAM & DESCRIPTION IC1 CSC3414A Name Name A OUTPUT B +INPUT A –INPUT B –INPUT A +INPUT B OUTPUT -17-...
  • Page 19 IC BLOCK DIAGRAM & DESCRIPTION ICH1 MP1029EM Name Name Name Name BSTR COMP PGND OUTR OUTL PGND AGND BSTL -18-...
  • Page 20 IC BLOCK DIAGRAM & DESCRIPTION IC101 CSC-1004D IVSYNC O SRST IV IY O PDA IFRST IC SY O O SCO IC O M P S IO SCI IC LKC HVDD IO M C LK O C PV O PSI O STV1 C S C -1004D O PSC O STV2...
  • Page 21 IC BLOCK DIAGRAM & DESCRIPTION IC101 CSC-1004 onpo oosco xout(25mhz) iohsy Bi dir.(3mA) iovsy Bi dir(3mA). opda 3_state(3mA) HVDD 5.0V osrst imode1 pull_down ocph1 imode2 pull_down ocph2 imode3 pull_down pcph3 ivpos1 pull_down osth1 3_state(3mA) ivpos2 pull_down osth2 3_state(3mA) oq2h ihpos1 pull_up LVDD 3.3V...
  • Page 22 IC BLOCK DIAGRAM & DESCRIPTION ICP1 EL7630 Name ENAB -21-...
  • Page 23 IC BLOCK DIAGRAM & DESCRIPTION DVD T3 AT24C02 START SERIAL STOP H.V. PUMP/TIMING CONTROL LOGIC LOGIC LOAD DATA RECOVERY COMP DEVICE ADDRESS COMPARATOR LOAD DATA WORD EEPROM ADDR/COUNTER Y DEC SERIAL MUX D out/ACK LOGIC V C C S C L S D A A T 2 4 C 0 2 G N D...
  • Page 24 IC BLOCK DIAGRAM & DESCRIPTION DVD U8 4558D NAME NAME -23-...
  • Page 25 IC BLOCK DIAGRAM & DESCRIPTION DVD T2 M12L64164A -24-...
  • Page 26 IC BLOCK DIAGRAM & DESCRIPTION T2 M12L64164A -25-...
  • Page 27 IC BLOCK DIAGRAM & DESCRIPTION DVD U6 TDA2822 + Vs LREE CONTROL 5,8,12,13 INPUT INPUT IN P U T + (2 ) IN P U T + (1 ) N .C . N .C . IN P U T - (2 ) IN P U T - (1 ) G N D G N D...
  • Page 28 IC BLOCK DIAGRAM & DESCRIPTION DVD U3 AT5654H THERMAL STAND VINFC STBY SHUT DOWN OET1 BIAS CFCerr1 7.5K V TK CFCerr2 OET2 CTKerr1 7.5K CTKerr2 7.5K V LD VOSL 7.5K VNFFC Pre GND DET AMP. DET AMP. VNFTK PGND PGND PGND PGND VOSL-...
  • Page 29 IC BLOCK DIAGRAM & DESCRIPTION T4 S29AL008D -28-...
  • Page 30 IC BLOCK DIAGRAM & DESCRIPTION T4 S29AL008D -29-...
  • Page 31 IC BLOCK DIAGRAM & DESCRIPTION U1 S8521 -30-...

  • Page 32: Ic Block Diagram & Description

    IC BLOCK DIAGRAM & DESCRIPTION U26 TEA2025B THERMAL PROTECT START CIRCUIT DECOUPLING TEA2025B BRIDGE GND (sub.) OUT. 2 IN.1 (+) BOOT. 2 FEEDBACK FEEDBACK BOOT.1 IN. 2 (+) OUT. 1 + Vs -31-...

  • Page 33: Explode View

    EXPLODED VIEW -32-...

  • Page 34: Schematic Diagram

    SCHEMATIC DIAGRAMS Monitor Part Monitor MAIN BOARD VCC1 VCC1 R222 R224 R226 R228 R230 R232 R234 R236 R240 R242 OPEN OPEN 100K 100K 100K COLOR RGB-AMP SUBB BRIGHT CONTRAST PICTURE R305 BOUT GOUT ROUT C229 R306 10K C219 C230 R223 C220 C225 C228...
  • Page 35 Monitor Part Monitor HV BOARD 47uH ICH1 MP1029 330K 10U/16V ABRT AGND ISFB CRH3 CRH4 CH10 VLFB 5.6V 0.01u CH11 DBRT 100K CH12 COMP 0.01u CH14105/ X7R/ 16V CH13 0.01u 104/ X5R/ 10V 0.22u BATT BATT CH19 105/ X5R/ 16V 105/ X5R/ 16V 10pF/ C0G/ 3KV OUTL...
  • Page 36 Monitor Part Battery Circuitry B1184 1.25A R138 10UF 10UF 470K SI2313 2412 7805 150K CHECK IC11 2412 C945 4.7UF S-8241ABJ R137 100K 470K CHECK OPEN 100K 0.1UF 0.47UF R135 OPEN 100K 2312 P0.0 XOUT P0.1 P1.2 P0.2 LM358 S3C9444 IC3A 0.1UF 0.1UF LM358...
  • Page 37 DVD KEY-1 CON1 pin6 MEN U5 LEFT ALDWN RIGHT -36-...
  • Page 38 DVD KEY-2 CON1 PIN5 SCREEN MODE PAUSE PLAY HEXT PREV STOP -37-...
  • Page 39 DVD Part DVD MT1389E DV33 DV33 APLLVDD3 RFV33 RFVDD3 JITFO 390pF JITFN DACVDD3 RFV33 2200pF 750k 0.1uF/OPEN 0.1uF 10uF/25v 680k ADIN 0.1uF 0.01uF 0.1uF 10uF/10v 1500pF 10uF/25v 0603 100k 10uF/10v 1500pF DV33 150k 150k PLLVDD3 0603 EC43 680k DV33 2200pF V1P4 DV33 ADACVDD3...
  • Page 40 DVD MEMORY RDQ0 RDQ1 DMA0 RDQ0 RDQ2 DMA1 RDQ1 RDQ3 DMA2 RDQ2 RDQ4 DMA3 RDQ3 RDQ5 DMA4 RDQ4 RDQ6 DMA5 RDQ5 RDQ7 DMA11 DMA6 RDQ6 RDQ8 DMA7 RDQ7 RDQ9 DMA8 RDQ8 DQ10 RDQ10 DMA9 RDQ9 DQ11 RDQ11 DMA10 RDQ10 MA10 DQ10 DQ12 RDQ12...
  • Page 41 DVD AV-PORT +12VA EC40 0.1U 220p EC28 5.1k EC29 HEAD_R 4558-sop8 2000p SOP8 A_MUTE C2001 EC37 R121 R100 SPKR EC30 R122 100k R131 A_MUTE C2001 R101 EC31 220p R103 R102 5.1k R104 4558-sop8 EC32 R105 HEAD_L SPKR SPKR [ 5,4 ] R106 2000p SOP8...
  • Page 42 DVD POWER +12VIN DV33 Sk24 bom要改 DV33 PV33 AO3409 101UH 1.5A 101UH 1.2A RFV33 ON/OFF on/off vout 0.1U 1000P 0.1uF 1000P 100u/16V LDO_AV33 S-8521F33 LDO_AV33 DV33 LDO_AV33 ON/OFF ON/OFF +12VIN +12VA +12VIN SZ2307 dv33 100k dv33 CB32 EC35 dv33 +12VIN 0.1uF 100uF/16V 0.1uF...
  • Page 43 DVD AUDIO DV33 4.7k AVINPUT dv33 TRIN [ 2 ] Y18 Y14 Y15 DV33 TRIN 7.5K 4.7k 8pin/1.25mm SPKR SPKR [ 5,4 ] J10 switchpower MONITOR_12V ON/OFF 9V +12VAMP SPKL SPKL [ 5,4 ] 9014b 4.7k Y(VIDEO) CVBS power WDIE1 WDIE1 +12VIN 47UH...
  • Page 44 MEMO...

Table of Contents