Service manual

ManualsBrandsDaewoo ManualsPortable DVD PlayerDPC-7900 Series

S er v ice M a nua l

Portable DVD Player

Model: DPC-7900 Series

S/ M No. : OSPC790001

May. 2005

 C aution

: In this Manual, s ome parts can be changed for improving,

their performance without notice in the parts list.

Summary of content (39 pages)

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S/ M No. : OSPC790001 Ser v ice M a nua l Portable DVD Player Model: DPC-7900 Series C aution : In this Manual, some parts can be changed for improving, their performance without notice in the parts list. May.
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No.: Revision: 0.1 Date: Service Manual for Portable DVD DPC-7900 Series Name of Company DAEWOO ELECTRONICS CORP. Approved by SIGNATURE DATE APPROVED BY DATE / REVIEWED BY / PREPARED BY / Please return 1 copy for our confirmation with your signature and comments. Elliott Chang 18th.Dec.
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Revision Record Date Rev No Section 17/ Dec./ 2005 0.1 New edition Description Design and specifications are subject to change without notice. All trademarks used in the specifications are the property of their respective owners.
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1. General Descriptions ………………………………………………… 1 1.1. Model Features 1.2. Information ………………………………………………………… 1 ………………………………………………………………… 2 2. Electrical Characteristics …………………………………………… 3 2.1. Optical Characteristics ………………………………………………………3 2.2. Electrical Characteristics ……………………………………………… 3 2.3. System Block Diagram 4 …………………………………………………… 2.4. Schematic Circuit Diagram ………………………………………… 5 3. Power ……………………………………………………………………… 11 3.1. Power Supply ……………………………………………………………… . 11 3.2.
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1 General Descriptions 1.1 Model Features Video: DVD Playback, MPEG4(option) ,DivX(DivX Model),Kodak Picture CD compatible & JPEG readable Audio: CD, CD-R, CD-RW, MP3, WMA Playback Firmware Upgradable Dolby Digital Output 7" active-matrix TFT screen, 16:9 wide aspect ratio Composite Video Output Ultra dimension & light weight: 205mm(L) x 163.
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1.2 Information Disk Format DVD, VCD, CD, MP3, CD-R, CD-RW, MPEG4 (OPTION),JPEG, Kodak Picture CD, DivX(DivX Model),WMA Video System NTSC / PAL/Auto Video Decompression MPEG-2 (ISO/IEC-13818), MPEG-1 Video Output 800~1200mVpp/75 ohm Audio Characteristic 2-Channel Analog Analog Output 1.0~2.0Vrms/10K ohm Frequency Response DVD: 48kHz Sampling: 20Hz-20kHz CD: 20Hz-20kHz S/N Ratio <= -65dB Dynamic Range <= -85dB Audio Output Noise &Distortion Less than<= 0.
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2 Electrical Characteristics 2.1 Optical Characteristics Parameter Specifications Unit Screen Size 7.0 (16:9 diagonal) inch Display Format 1400 (H) 234 (V) dot Active Area 154.08 (H) 86.08 (V) mm Dot Pitch 0.107 (H) 0.370 (V) mm Pixel Configuration Stripe Outline Dimension 166.0 (W) 100.0 (H) 7.2 (D)(typ.) Surface Treatment Anti-Glare and Hard Coating Weight 180 ± 10 mm g 2.
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2.3 System Block Diagram 2.3.1. The System Block Diagram & the Block's Function Description INVERTER DISPLAY 7” TFT LCD PW070XU3 DC To DC MP1580 TFT LCD Driver IR3Y29B +HX8806 Loader DM-520A 2. Servo +MPEG MT1389D/MT1389C 1.
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(1)POWER_MPS 2.4 Schematic Circuit Diagram CTR_5V CTR_5V R156 4.7k/open RM12 330O +3.3V 9VIN RM11 4.7K/open QM1 OPEN/3904 9VIN NCTR_5V NCTR_5V NCTR_5V C119 10uF 33R OPEN 0.01uF CM1 RM4 39K RM9 OPEN 330O R1 Q1 3904 1 2 3 4 UM1 MPS1580 BS Sync Vin EN Vsw Comp GND FB CM8 MPS1580 BS Sync Vin EN Vsw Comp GND FB 0.01uF UM2 1 2 3 4 D1 2 LED1 1 8 7 6 5 8 7 6 5 2 RM5 10K 1 DIODE DM2 +3.3V DELETA DIODE DM1 LM1 22uH CM3 100pF 30.9K CM9 0.022uF 0.022uF CB60 0.
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C118 9VIN 9VIN +3.3V 1 + - C2 + D2 2 RB053L-30 0.1uF +5V L2 1 2 1 20uH U1 OUT BP 3 4 RT9167A-185CS IN SHDN- C7 100uF/10V/LU C5 0.01uF 2 R11 20K C1 100uF/6.3V/LU 1 1 C6 100uF/6.3V/LU C10 47uF/25V/LU Q2 BSH105 1 D4 1N5819 D5 2 2 R14 1M 1N5819 V18 VCC C11 22uF/25V/LU C15 0.1uF +3.3V V18 VCC +7.5V_TFT 220R +3.3V +5V CTR_LOAD +5V_TRAN 20uH POWDET_MPEG POWDET_MCU CTR_TFT5V CTR_AUDIO L1 C9 47uF/25V/LU -10V_TFT R12 R13 20K + C16 100uF/16V/LU +5V +3.
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L51 RFV33 DV33 OPO R173 150k R169 0 RFV33 RFV33 TP4 TP5 TP6 L33 FB L36 10uH 3216 + ADACVDD3 R176 6.8 ADACVDD3 C88 16800PF 0603C + C74 0.1uF CE48 100uF/16v C8 +c88=17nf 0603C 0.1uF CB75 C75 CB72 0.1uF C76 RFVDD3 2200pF C93 0.
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(4) SDRAM&FLASH&EEPROM MA0 MA1 MA2 MA3 MA4 MA5 MA6 MA7 MA8 MA9 MA10 DBA0 SDCLK SDCKE 38 37 23 24 25 26 29 30 31 32 33 34 22 35 20 21 21 22 23 24 27 28 29 30 31 32 20 19 35 34 NC NC U7 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 BA/A11 CLK CKE CS RAS CAS WE DQML DQMH NC NC VSS VSS DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 DQ9 DQ10 DQ11 DQ12 DQ13 DQ14 DQ15 VCC VCC VCCQ VCCQ VCCQ VCCQ VSSQ VSSQ VSSQ VSSQ VSSQ VSSQ VSSQ VSSQ VCCQ VCCQ VCCQ VCCQ VCC VCC VCC DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 DQ9 DQ10 DQ11 DQ12 DQ13
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(5) VIDEO OUTPUT ASPDIF Y6 Y5 Y4 Y3 R153 100R R146 150R R149 150R R151 150R R152 75R VIDEO_TV R154 100R L18 C43 47pF L21 C48 47pF L22 C51 47pF L45 C128 47pF C131 0.1uF C132 330pF C133 270pF 1.8uH 1.8uH 1.8uH 1.8uH C44 47pF C49 47pF C122 47pF C113 47pF C134 470pF J10 VIDEO VIDEO COAXIAL GND GND SVIDEO_Y SVIDEO_C CVBS_TFT CVBS_OUT VIDEO/COAXIAL 1 2 3 4 5 L19 L20 2.7uH 2.
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ACLK ALRCK ABCK ASDAT0 VCCAUD MUTE_DAC SHUTDOWN +C63 VCCAUD SHUTDOWN ACLK ALRCK ABCK ASDAT0 MUTE_DAC SACLK SLRCK SBCLK SDAT0 4 3 2 1 U16 SDATA ACLK ALRCK ABCK ASDAT0 VA AOUTL AGND DEM/SCLK AOUTR CS4334-OPEN LRCK 6 7 8 9 10 MCLK AOUTR GND 8 7 6 5 1 3 5 7 RN3 33x4 2 4 6 8 AL DAC_ML A_AVDD SACLK SLRCK SBCLK SDAT0 C58 0.1uF DAC_MR C53 10uF/16V C61 10uF/16V R88 10K C52 C59 220pF R100 10K R89 5.1K 220pF C55 1000pF R101 5.
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3 Power 3.1 Power Supply Input voltage: Normal voltage: 100 to 240 Vac. Variation range: 90 to 264 Vac. Input frequency: Normal frequency: 50 to 60 Hz. Variation range: 47 to 63 Hz. Input current: 0.6 arms max. at any input voltage and max. DC output rated load. Inrush current: 70 amps max. cold start at 240 Vaz. Input, with rated load and 25 ambient. AC leakage current: 0.25 mA max. at 240 Vac. Input. 3.2 Rechargeable Battery Output Voltage 8.4~6.0V Cut-off Voltage 5.7~6.
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The battery pack shall return to normal operation only after the fault has been removed. A thermal fuse must be added on the surface of cell body to protect the battery pack. A polyswitch must be add to protect the battery pack. Charge & Play Time of Battery Pack Ni-MH 2400mAh (6S1P) Charge Time (hr) DVD Title Play Time (hr) 4~5 2.
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4 Dimension & Physical Characteristics 4.1 Outline Dimension 205mm(L) x 163.5mm(W) x 38mm(H) 4.2 Physical Characteristics 1 15 15 2 3 4 5 6 7 8 9 10 11 12 13 14 1.LCD SCREEN 3.DISC MENU 5.TV MODE 7.SUB TITLE 9.PAUSE 11.ENTER 13.SETUP 15.SPEAKERS 2.TFT ON/OFF KNOB 4.PREV 6.NEXT 8.PLAY 10.STOP 12.DIRECTION BUTTONS/FR,FF 14.
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4.3 Exploded View 4.3.
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4.3 Exploded View 4.3.
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4.3 Exploded View 4.3.
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4.3 Exploded View 4.3.
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4.3 Exploded View 4.3.
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5 Regulatory Standards 5.1 Safety UL FDA LVD 5.2 EMI CE FCC 5.
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6 Service Tools and Equipment 6.1Service Tools and Equipment Table Application General Name DVD Testing Disc General Tools Confirm screwdriver etc. CD Testing Disc VCD Testing Disc Adjust Oscillograph Probes AV Cables TV Monitor Searing-iron Grounding for electrostatic breakdown Antistatic wrist strap Conductive material steel sheet 6.2 Storing and Handling Test Discs It is important for a DVD testing disc keeping its surface precise. Please care for storing and using it. 1.
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3. Do not place the disc on a glass surface. It may damage the disc. If this happened, please use a new testing disc adjust DVD player precision. 6.3 Notes PLEASE READ ALL NOTES GIVEN IN THIS MANUAL. ■ Locate ● Place the unit on a firm, flat surface. ● Do not place in a high temperature (upwards of 40 ) or high wet (upwards of 80 percent) area. ● Do not place in an area with a lot of dust. ● Keep away from direct sunlight &domestic heating equipment. ■ Do not fall any objects into the unit.
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or death. ● This unit should be situated away from heat source, such as amplifiers, radiators, stoves or any other units producing heat. ■ Condensation Lens could be moistening in these cases. ● Turn on heater shortly, ● In a very wet room, ● Move the player from a cold environment to a heat environment quickly. Being moisture inside the play could operate normally. Please turn on power and wait about an hour for drying the moisture.
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7 Spare Parts 7.1 Key Parts List Location Part NO GKB2.855.8105MX GKB2.855.
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8 Trouble Shooting 8.
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T33 MP3 abnormal sound T34 Audio no waveform (sound) or waveform (sound) abnormal Earphone Test T41 Earphone no sound or the sound has pause, abnormal sound, noise, echo T42 Earphone (right) no sound or the sound has pause, abnormal sound, noise T43 Earphone (left) no sound or the sound has pause, abnormal sound, noise Function Key Test T51 Video can’t be still or stop T52 Can’t execute fast forward or rewind T53 Panel button System Setting Test T61 Can’t enter the system setting T62 The
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Please replace with a good one. Disassemble F/W, replace with a good one or re-plug it to see if the LED lights up when Power ON. D. If the above actions are not working, replace the Main Board. C. T03 Loading time too long Main Board A. Check the flat cable to see if it is adhibited to the right place. B. Remove the cover to see if the resistors or resistor-array adjacent to U38 and or U17, to see if there is any cold soldering, hollow soldering, misplaced soldering, or wrong part. C.
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C. Remove the top cover, check all flat cables in the system to see if they are correctly plugged to the fixed positions, or re-plug them. D. Check the capacitors C19 and the diode D6 to see if the reset circuit works normally. E. If the above actions are not working, replace the Main Board. DVD ROM A. Check the loader to see if it is not stable (any condition that some of the discs can’t be played). If so, replace the loader. DVD DISC A.
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replace the main board. T13 Disc drive scratches disc Main Board A. Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollow B. soldering, cold soldering, wrong part, or misplaced soldering. If the above actions are not working, replace the loader. If it is still not working, replace the main board. DVD ROM A. Check the loader to see if it is the cause of disc scratching. If so, replace the loader. T14 Not every disc can be played Main Board A.
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correctly plugged to the fixed positions, or re-plug them. B. Use oscilloscope to measure if Y1 generates 27MHz. If it does not generate said frequency, and the problems such as cold or hollow soldering have been ruled out, it maybe Y1 work abnormally . Replace Y1 with a 27MHz fundamental frequency oscillater. C. Check if U17(F/W) IC has any problem. D. Check if switch for TFT on/off is normal; replace a new one if necessary. E. If the above actions are not working, replace the Main Board.
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D. If the above actions do not work, then check U17 Pin179 and Pin181 to see if there is Y and C signals. E. If the above actions are not working, replace the Main Board. T24 VCD abnormal picture Main Board A. B. C. Check main board to see if there is any cold or hollow soldering and short circuit problem and rule out the problem. Check the resistors or capacitors adjacent to IC(U17) to see if there is any hollow soldering, cold soldering, wrong part, or misplaced soldering.
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B. Remove and dis-assemble U7 with a 16Mbit SDRAM. C. If the above actions are not working, replace the Main Board. T31 Audio /left channel (AOL) no sound or abnormal sound Main Board A. Remove the cover. Check U15 on the Main board to see if there is any cold soldering, hollow soldering, or damage. Rule out the problem. B. Check all parts following AOL to see if there is any cold or hollow soldering, short circuit, broken circuit, parts missing, wrong parts and rule out the problem. C.
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B. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering and rule out the problem. C. If the above action does not work after the inspection, replace the main board. T42 Earphone Audio right no waveform (sound) or waveform (sound ) abnormal Main Board A. Check U19,U15 and J4,CON3 to see if there is any cold or hollow soldering and rule out the problem. Especially check for C24,C26,C28. B. If the above action does not work after the inspection, replace the main board.
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Main Board A. Check U17 to see if there is any cold or hollow soldering and reverse soldering of IC or parts missing. B. If the above actions do not work after the inspection, it means the main board or F/W is bad. C. If the disk is abnormal, ask for a new version software . T62 System can’t play or system down after setting Main Board A. Check U17 to see if there is any cold or hollow soldering and reverse soldering of IC or parts missing. B.
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A. Measure the voltages of VGH,VGE,VCC,VDD,VIN and VSS to see if they are correct. B. Check VC1 to see if there is any cold or hollow soldering and reverse soldering of IC or parts missing. C. Check the devices surrounding U1 and U201 to see if there is any cold or hollow soldering and reverse soldering of IC or parts missing. D. Check Y1,Y2 to see if there is any cold or hollow soldering and reverse soldering of IC or parts missing. E. If the above actions are not working, replace the Driver Board.
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of IC or parts missing. E. Check Pin 1 to Pin 16 on U202 for any cold or hollow soldering and reverse soldering of IC or parts missing. F. If the above actions are not working, replace the Driver Board. T75 TFT ripple Main Board A. Check the 13-pin cables connected to the driver board to see if there is any problem of plugging. Rule out the problem. B. Check the 3-pin cable connected to the high-voltage board to see if there is any problem of plugging. Rule out the problem. C.