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  4. DPC-7400 Series
  5. Serivce Manual

Daewoo DPC-7400 Series Serivce Manual - 1 General Descriptions

Other manuals for DPC-7400 Series: Service Manual

Summary of DPC-7400 Series

  • Page 2: Revision Record

    Revision record date rev no section description 17/ dec./ 2005 0.1 new edition design and specifications are subject to change without notice. All trademarks used in the specifications are the property of their respective owners..

  • Page 3

    1. General descriptions ………………………………………………… 1.1. Model features ………………………………………………………… 1.2. Information ………………………………………………………………… 2. Electrical characteristics …………………………………………… 2.1. Optical characteristics ……………………………………………………… 2.2. Electrical characteristics ……………………………………………… 2.3. System block di...

  • Page 4: 1 General Descriptions

    - 1 - 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 out...

  • Page 5

    - 2 - 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 800~1200mv pp/75 ohm audio characteristic 2-channel analog analog output 1.0~2.0v...

  • Page 6

    - 3 - 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) ...

  • Page 7

    - 4 - 2.3 system block diagram 2.3.1. The system block diagram & the block's function description dc to dc mp1580 1. Loader dm-520a 2. Servo +mpeg mt1389d/mt1389c display 7” tft lcd pw070xu3 inverter tft lcd driver ir3y29b +hx8806.

  • Page 8

    - 5 - 2.4 schematic circuit diagram ( 1 ) p o w e r _ m p s 1 deleta 9vin +3.3v +5v nctr_5v ctr_5v ldo_av33 rfv33 nctr_5v 9vin +5v +3.3v ctr_5v nctr_5v +3.3v rfv33 +3.3v ldo_av33 rm4 39k qm 1 open/3904 1 2 3 um1 mps1580 1 2 3 4 8 7 6 5 bs vin vsw gnd sync en comp fb cm7 220uf/6.3v/lu d1 led1 1 3 2 c...

  • Page 9

    - 6 - (2) power for tft 1 1 1 1 1 1 1 -10v_tft +15v_tft +7.5v_tft vsync# powdet_mcu +3.3v_tft +5v_tft +5v_tran vin +3.3v +5v v18 +3.3v_tft +5v_tran 9vin vout 9vin ctr_load ctr_audio powdet_mpeg ctr_tft5v powdet_mcu +5v_tran hsync# vcc +5v_tft +7.5v_tft +3.3v_tft -10v_tft vcc +15v_tft +3.3v v18 +3.3v...

  • Page 10

    1 1 1 1 tr- 10 vr gnd gnd c c 8 9 11 b gnd rs-232 3 24 6 19 5 pd 17 vcc v1.7 18 b c 15 vs(vc) ld(dvd) hop1200/1200n(1240) d 16 a 1 14 1 gnd(nc) 2 vr f 7 20 e 12 vcc 21 fo+ very important to reduce noise 22 2sb11 32 vrf(1.4v) 23 tr+ hitachi hop1200/1200n(1240) c15 closed to pin186 pd(monitor) ld(cd) ...

  • Page 11

    - 8 - (4) sdram&flash&eeprom tsop 48 pin iic dram flash 16mb 32mb 8m 16m 32m fla sh delete dq[0..15] ad[0..7] ba[0..1] dqm[0..1 ] ma[0..1 1] a[0..21] a9 a3 ad 3 a1 a1 9 a4 ad 6 ad 1 a1 7 a1 6 a1 3 a1 4 ad 0 a2 a6 a8 a1 8 ad 7 a7 ad 5 a1 2 a1 5 a1 0 ad 2 ad 4 a1 1 a5 a0 ras # pce# cas # prd# dcke sda...

  • Page 12

    - 9 - (5) video output 1 1 tft i/o 2n3904 3 c e 2 b 1 tft_cvbs -10v_tft 9vin +3.3v_tft +7.5v_tft +15v_tft +5v_tft aspdif y[3..6] cvbs_tft video_tv int/ext p/n aspdif +5v_tran tft_out tft_cvbs svideo_y svideo_c scale video_tv tft_out cvbs_tft cvbs_out p/n scale +5v_tran +5v_tft +5v y3 y4 y5 cvbs_out ...

  • Page 13

    - 10 - (6) audio output 1 1 1 vref5v vccaud vref5v vref5v a_in/outr a_in/outl aclk mute_dac alrck aclk abck asdat0 sdat0 saclk slrck alrck sbclk abck asdat0 dac_ml saclk sbclk a_avdd slrck dac_mr sdat0 +3.3v a_in/outl aout_r vcc int/ext a_mute shutdown cvbs_tft tft_out cvbs_out cvbs_tft tft_out cvbs...

  • Page 14: 3 Power

    - 11 - 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. C...

  • Page 15

    - 12 - 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 charge time (hr) dvd title pl...

  • Page 16

    - 13 - 4 dimension & physical characteristics 4.1 outline dimension 20 5mm(l) x 163.5mm(w) x 38mm(h) 4.2 physical characteristics 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15 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...

  • Page 17

    - 14 - 4.3 exploded view 4.3.1 dvd door & mainbody_top module.

  • Page 18

    - 1 5 - 4.3 exploded view 4.3.2 keyboard & mainbody_top module.

  • Page 19

    - 1 6 - 4.3 exploded view 4.3.3 mecha & mainbody_bottom module.

  • Page 20

    - 1 7- 4.3 exploded view 4.3.4 mainbody module.

  • Page 21

    - 1 8 - 4.3 exploded view 4.3.5 display module & mainbody module.

  • Page 22: Regulatory

    - 1 9 - 5 regulatory standards 5.1 safety ul fda 5.2 emi ce fcc 5.3 ergonomics dolby - 15 - lvd.

  • Page 23

    - 20 - 6 service tools and equipment 6.1service tools and equipment table application name dvd testing disc general general tools screwdriver etc. Cd testing disc confirm vcd testing disc oscillograph probes av cables adjust tv monitor searing-iron antistatic wrist strap grounding for electrostatic ...

  • Page 24: 6.3 Notes

    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 ...

  • Page 25

    - 22- 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 e...

  • Page 26: Spare Parts

    - 23 - 7 spare parts 7.1 key parts list location part no part name description maker remark gkb2.855.8105mx mepg board hiteker w/o divx gkb2.855.8138mx main board mepg board(with divx) hiteker with divx u17 mt1389qe_d mtk1389d mtk w/o divx u11 icmt1389de-c mpeg ic mtk1389c mtk with divx u11 at49lv40...

  • Page 27: Trouble Shooting

    - 2 4 - 8 trouble shooting 8 .1 error code table code descriptions of error note power test t01 no power no action t02 power led indicator is not on or insufficient brightness t03 loading time too long t04 remote control bad sensing or not functional t05 system stays in the run in condition after po...

  • Page 28

    - 2 5- 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 p...

  • Page 29

    - 26 - please replace with a good one. C . 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. T03loading time too long main board a. Check the flat cable to see if it is adhibited to the ...

  • Page 30

    - 27 - 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....

  • Page 31

    - 28 - replace the main board. T13disc drive scratches disc main board a. Check the resistors or capacitors adjacent to ic (u17) to see if there is any hollow soldering, cold soldering, wrong part, or misplaced soldering. B. If the above actions are not working, replace the loader. If it is still no...

  • Page 32

    - 29 - 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 fre...

  • Page 33

    - 30- 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. T24vcd abnormal picture main board a. Check main board to see if there is any cold or hollow soldering and short circuit pr...

  • Page 34

    - 31 - b. Remove and dis-assemble u7 with a 16mbit sdram. C . If the above actions are not working, replace the main board. T31audio /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 ...

  • Page 35

    - 32 - 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. T42earphone audio right no waveform (sound) or waveform (sound ) abnormal main board a. Check u19,u15 and j...

  • Page 36

    - 33 - 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 . T62system can’t p...

  • Page 37

    - 3 4 - 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 rever...

  • Page 38

    - 3 5 - 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. T75tft ripple main board a. Check the 13-pin cables connected to the driver board to se...