Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo TV CM-905S-[1].part2

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CM-905S-[1].part2


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                                                S/M No. : TCM905SEF0


Service Manual
Colour Television
CHASSIS : CM-905S/SF
Model : DTD-14D3/20D3/21D3                          ME/MT/MP/MZ
                 14D4/20D4/21D4                     ME/MT/MP/MZ
                 14D6/21D6                          ME/MT/MP/MZ
                 14D7/20D7/21D7                     ME/MT/MP/MZ
                 21U6/21U8                          ME/MT/MP/MZ




Specification
 Items           Model   DTD-14D3/20D3/21D3 ME/MT/MP/MZ
                         14D4/20D4/21D4 ME/MT/MP/MZ
                         14D6/21D6 ME/MT/MP/MZ
                         14D7/20D7/21D7 ME/MT/MP/MZ
                         21U6/21U8 ME/MT/MP/MZ
 TV Standards            PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV)
 Mains Voltage           AC 100~250V, 50/60Hz
 Power Consumption       Stand-by mode : 5W
                         Normal Operating Mode : 14"=85W, 20"=95W, 21"=105W, 21"(flat)=115W
 Sound Ouput1            14/20"=5W+5W Over(80% MOD.at 1KHz THD.10%)
                         21U6=5W+5W Over(80% MOD.at 1KHz THD.10%)
                         21",21U8=7W+7W Over(80% MOD.at 1KHz THD.10%)
 Speaker                 14/20"=7.5W 8 Ohm (2pcs)
                         21U6=5W 8 Ohm (2pcs) , 21",21U8=12W 8 Ohm (2pcs)
 Antenna                 75 Ohm Unbalanced. (DIN Standard)
 Tuning System           FS Tuning System
 Memory Channel          100 Channels
 Remocon Control         R-44C07
 Reception Channel       VHF - BAND1 : CH2-CH4
                                 BAND2 : CH5-CH12
                                 CABLE BAND : S1'-S3, S1-S20
                                 HYPER BAND : S21-S41
                         UHF-BAND : CH21-CH69
 Remark                  OSD
                         TELETEXT (Top & Flop Teletext)
                         PIP(AV PIP Swap, Size, Position)
                                   ,
                         Digital Eye




DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr                                            June.2001
 TABLE OF CONTENTS



SPECIFICATIONS .............................................................................................................. 2
SAFETY INSTRUCTION .................................................................................................... 3
CIRCUIT BLOCK DIAGRAM ............................................................................................. 4

ALIGNMENT INSTRUCTIONS .......................................................................................... 5
CM-905S/SF TYPICAL SERVICE DATA ............................................................................ 8
SCHEMATIC DIAGRAM ..................................................................................................... 11

PRINTED CIRCUIT BOARD .............................................................................................. 12
MECHANICAL EXPLODED VIEW AND PARTS LIST ...................................................... 13
ELECTRICAL PARTS LIST ............................................................................................... 19

CM-905S/SF EACH MODEL PARTS LIST ........................................................................ 29


APPENDIX ("Appendix is provided only by internet [http://svc.dwe.co.kr]")



IC DESCRIPTION .............................................................................................................. 1
TROUBLE SHOOTING CHARTS ...................................................................................... 19




                                                              -1-
SPECIFICATIONS
CAUTION

  Items           Model   DTD-14D3/20D3/21D3 ME/MT/MP/MZ
                          14D4/20D4/21D4 ME/MT/MP/MZ
                          14D6/21D6 ME/MT/MP/MZ
                          14D7/20D7/21D7 ME/MT/MP/MZ
                          21U6/21U8 ME/MT/MP/MZ
  TV Standards            PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV)
  Mains Voltage           AC 100~250V, 50/60Hz
  Power Consumption       Stand-by mode : 5W
                          Normal Operating Mode : 14"=85W, 20"=95W, 21"=105W, 21"(flat)=115W
  Sound Ouput1            14/20"=5W+5W Over(80% MOD.at 1KHz THD.10%)
                          21U6=5W+5W Over(80% MOD.at 1KHz THD.10%)
                          21",21U8=7W+7W Over(80% MOD.at 1KHz THD.10%)
  Speaker                 14/20"=7.5W 8 Ohm (2pcs)
                          21U6=5W 8 Ohm(2pcs) , 21",21U8=12W 8 Ohm (2pcs)
  Antenna                 75 Ohm Unbalanced. (DIN Standard)
  Tuning System           FS Tuning System
  Memory Channel          100 Channels
  Remocon Control         R-44C07
  Reception Channel       VHF - BAND1 : CH2-CH4
                                BAND2 : CH5-CH12
                                CABLE BAND : S1'-S3, S1-S20
                                HYPER BAND : S21-S41
                          UHF-BAND : CH21-CH69
  Remark                  OSD
                          TELETEXT (Top & Flop Teletext)
                          PIP(AV PIP, Swap, Size, Position)
                          Digital Eye




                                          -2-
SAFETY INSTRUCTION
CAUTION

  NOTE
        BEFORE SERVICING THIS CHASSIS READ THE "X-RAY RADIATION PRECAUTIONS",
        "SAFETY PRECAUTIONS" AND "PRODUCT SAFETY NOTICE" BELOW.



  X-RAY RADIATION PRECAUTIONS

 1. Excessive high voltage can produce potentially hazard-            of the high voltage recorded as a part of the service
    ous X-RAY RADIATION. To avoid such hazards, the                   recorded as a part of the service records. It is important
    high voltage must not exceed the specified limit. The             to use an accurate and reliable high voltage meter.
    nominal value of the high voltage of this receiver is          2. The only source of X-RAY RADIATION in this TV
    25kV(21") at max beam current. The high voltage must              receiver is the picture tube. For continuous RADIATION
    not, under any circumstances, exceed 27kV(21").                   protection, the replacement tube must be exactly the
    Each time a receiver requires servicing, the high volt-           same type tube as specified in the "PART LIST".
    age should be checked. It is recommended the reading


  SAFETY PRECAUTIONS

 1. Potentials of high voltage are present when this               2. If any FUSE in this TV receiver is blown, replace it will
    receiver is operating. Operation of the receiver outside          the FUSE specified in the "PART LIST".
    the cabinet or with the back cover removed involves a          3. When replacing a high wattage resistor (oxide metal
    shock hazard from the receiver.                                   film resistor) in circuit board, keep the resistor 10mm
  1) Servicing should not be attempted by anyone who is               away from circuit board.
      not thoroughly familiar with the precautions necessary       4. Keep wires away from high voltage or high temperature
      when working on high voltage equipment.                         components.
  2) Always discharge the picture tube to avoid the shock          5. This receiver must operate between AC 100~240 volts,
      harzard before removing the anode cap.                          50/60Hz. NEVER connect to DC supply or any other
  3) Discharge the high potential of the picture tube before          power or frequency.
      handling the tube. The picture tube is highly evacuated
      and if broken, glass fragments will be violently expelled.


  PRODUCT SAFETY

 Many electrical and mechanical parts in this chassis have         ments, electrical components having such features are
 special safety-related characteristics.                           identified by designated symbol     on the "PART LIST".
 These characteristics are often passed unnoticed by a             Before replacing any of these components, read the "PART
 visual inspection and the X-RAY RADIATION protection              LIST" in this manual carefully.
 afforded by them cannot necessarily be obtained by using          The use of substitute replacement part which do not have
 replacement components rated for higher voltage, wattage,         the same safety characteristics as specified in the "PART
 etc.                                                              LIST" may created X-RAY RADIATION.
 Replacement parts which have these special safety char-
 acteristics are identified in this manual and its supple-




                                                             -3-
CIRCUIT BLOCK DIAGRAM
CAUTION




                -4-
 ALIGNMENT INSTRUCTIONS
CAUTION
1. AGC ADJUSTMENT

  1) Pattern : PAL B/G 10CH Color BAR (RF Level = 60 dB)
  2) Connect the Pattern Generator RF Output to Tuner RF Input.
  3) Press the S10 Key of Service Remocon to enter the "AGC MODE".
  4) Execute the "AUTO AGC" using the Vol-Up Key.

2. SCREEN ADJUSTMENT

  1) Pattern : PAL B/G Retma
  2) Press the NORMAL Key to set the "NORMAL 1" mode.
  3) Press the S2 Key of Service Remocon.
  4) Adjust the SCREEN VOLUME on FBT so that the horizontal line reach the cut-off point.

3. FOCUS ADJUSTMENT

  1) Pattern : PAL B/G Retma
  2) Adjust the FOCUS VOLUME on FBT to obtain clear resolution.

4. WHITE BALANCE ADJUSTMENT

  1) Press the NORMAL Key to set the "NORMAL 1" mode.
  2) Press the S8 Key of Service Remocon to enter the "WHITE BALANCE" mode.
  3) Adjust the each color ( R,G,B ) which appears abnormally on the screen.

5. GEOMETRIC ADJUSTMENT

  1) Press the NORMAL Key to set the "NORMAL 1" mode.
  2) Press the S6 Key of Service Remocon to enter the "GEOMETRIC" mode.

 5-1. VERTICAL CENTER ADJUSTMENT
    1) Pattern : PAL B/G Retma
    2) Choose the "V-CENTER" using the Pr-Up/Down Keys.
    3) Adjust the horizontal line of picture to coincide with the mechanical center marks of the CRT using the
        Vol-Up/Down Keys.
    * If the pattern is smaller than the screen, adjust the V-size to fit.

 5-2. VERTICAL SIZE ADJUSTMENT
    1) Pattern : PAL B/G Retma
    2) Choose the "V-SIZE" using the Pr-Up/Down Keys.
    3) Adjust the vertical size of the picture using the Vol-Up/Down Keys.




                                                            -5-
ALIGNMENT INSTRUCTIONS



5-3. HORIZONTAL CENTER ADJUSTMENT
 1) Pattern : PAL B/G Retma
 2) Choose the "H-CENTER" using the Pr-Up/Down Keys.
 3) Adjust the vertical line of picture to coincide with the mechanical center marks of the CRT using the
    Vol-Up/Down Keys.

5-4. HORIZONTAL SIZE ADJUSTMENT
 1) Pattern : PAL B/G Retma
 2) Choose the "H-SIZE" using the Pr-Up/Down Keys.
 3) Set each side over scan to be 10% using the Vol-up/Down Keys.

5-5. PINCUSHION ADJUSTMENT
 1) Pattern : PAL B/G Crosshatch
 2) Choose the "PARABOLA" using the Pr-Up/Down Keys.
    Adjust parabola width to fit on screen.
 3) Choose the "CONER" using the Pr-Up/Down Keys.
    Adjust coner parabola to fit on screen.
 4) Choose the "TRAPEZIUM" using the Pr-Up/Down Keys,
    Adjust trapezium to fit on screen.

5-6. S-CORRECTION ADJUSTMENT
 1) Pattern : PAL B/G Crosshatch
 2) Choose the "S-CORRECTION" using the Pr-Up/Down Keys.
 3) Adjust each distance of horizontal line to be the same using the Vol-Up/Down Keys.

5-7. SUB-BRIGHTNESS ADJUSTMENT
 1) Pattern : PAL B/G Retma
 2) Press the NORMAL Keys to set the "NORMAL 1" mode.




                                                          -6-
                                                                                           ALIGNMENT INSTRUCTIONS



6. REMOCON

 6-1. SERVICE REMOCON                                                  6-2. USER REMOCON



                                                            POWER
                     RECALL                MUTE




                          S1                S2               S3

                          S4                S5               S6

                          S7                S8               S9
                          S10                                S12
                                           S11

                   TV/CATV ADD/ERASE TV/VIDEO

                                                       NOISE CLEAR
                 SOUND MODE SURROUND




                                            CH

                                           MENU
                      VOL                                    VOL

                                            CH




                    PIP      POSITION M/S


                                     PAUSE/
                             TV/VIDEO STILL            CH     VOL


                  V-
                  POSITION      SIZE       SLEEP       1       2


                      3                4           5           6

                      7                8           9           0


                  R-34SVC




 6-3. SERVICE REMOCON
  1) Enter SERVICE MODE : Press keys of User Remocon, as follows.
     Ch91, Sharpness 0, Skip(red), Move(green), Menu.
  2) Choice SERVICE MENU : Pr-Up/Down
  3) Enter SERVICE SUB MENU : Vol-Up/Down
  4) Adjust SERVICE MENU : Vol-Up/Down




                                                                     -7-
CM-905S/SF TYPICAL SERVICE DATA
CAUTION


                             CM-905S/SF SVC KEY & FUNCTION DESCRIPTION
EY N       NAME                                    RFUNCTION
                    PRESS THE S1 ONE TINE ----> PRESS THE S1 ANOTHER TIME
S1     HEATRUN MODE                                                                    ON/OFF
                    (HEATRUN MODE)                  (NORMAL OPRATION)
                                        * FBT SCREEN ADJUSTMENT
           SCREEN
S2                  PRESS THE S2 ON TIME ----> PRESS THE S2 ANOTHER TIME
        ADJUSTMENT                                                                     ON/OFF
                    (HORIZONTAL KINE)                 (NORMAL OPRATION)
                                                  * SOUND TEST
                    PRESS THE S3 KEY IS TOGGLE
S3      SOUND TEST
                    VOLUME 00 ----> VOLUME 32 ----> VOLUME 63--->                   Line Production
                    BALANS LEFT ----> BALANS RIGHT ----> BALANS 00 ----> RELEAS
                                                 * PICTURE TEST
                    PRESS THE S4 KEY IS TOGGLE
S4     PICTURE TEST
                    CONTRAST 00 ----> CONTRASR 32 ----> CONTRAST 63 ---->           Line Production
                    RRIGHT 00 ----> BRIGHT 32 ----> BRIGHT 63 ---->
                    COLOR 00 ----> COLOR 32 ----> COLOR 63 ----> RELEASE
                                           * ADJUST NORMAL1 DATA                     INITIAL DATA
                                                   CONTRAST 48                             63
S5        NORMAL1                                  RRIGHT 38                               23
                                                   COLOR 38                                32
                                                   SHARPNESS 28                            32
                                      * ADJUST GEOMETRY DATA
                           21 inch Normal                 21 inch Flat Normal     INITIAL DATA(50Hz)
          V-CENTER                 04                              04                      04
            V-SIZE                 54                              58                      27
          H-CENTER                 11                              12                      14
            H-SIZE                 53                             52                       58
S6       PARABORA                  27                              48                      27
         TRAPEZIUM                 15                              17                      15
           CORNER                  05                              05                      05
            H-EHT                  03                              03                      03
       S-CORRECTION                08                              08                      07
        V-LINEARITY                08                              07                      09
            V-EHT                  03                              03                      03

             PIP                              * ADJUST PIP DATA                      INITIAL DATA
S7                         21 inch Normal                21 inch Flat Normal
              R                   220                             220                    128
              G                   220                             220                    128
              B                   220                             220                    128




                                                -8-
                                                          CM-905S/SF TYPICAL SERVICE DATA




                          CM-905S/SF SVC KEY & FUNCTION DESCRIPTION
      WHITE BALANCE                * ADJUST WHITE BALANCE DATA
           RB                  R LOW BEAM                           127
           GB                  G LOW BEAM                           146
S8
           BB                  B LOW BEAM                           125
           GG                  G HIGH BEAM                          52
           BG                  B HIGH BEAM                          52
       SUB-BRIGHT              ADJUST BRIGHTNESS DATA                35
S9
      SUB-CONTRAST            ADJUST SUB CONTRAST DATA               15
                                 * MAIN RF AGC ADJUSTMENT KEY
          AGC                        TUNER AGC VOLTAGE 3.5Vdc
S10
        AUTO-AGC
          DATA                                   32
                                * OPTION MODE ADJUSTMENT KEY                 INITIAL DATA
          TEXT     ARABIC/CYRILLIC/IRANIAN/EAST-LATIN//WEST-LATIN               ARABIC
S11
    POWER-ON-START                            ON/OFF                              ON
       DIGITAL EYE                            ON/OFF                              ON
                                            * OUT DATA
        PICTURE                             NORMAL 1
      BLUE SCREEN                               ON
          BASS                                CENTER
         TREBLE                               CENTER
        BALANCE                               CENTER
         EFFECT                                 OFF
         CLOCK
        ON TIMER
S12     ON TIMER
                                               OFF
         ON/OFF
          ON PR                                  1
       OFF TIMER
       OFF TIMER
                                               OFF
         ON/OFF
       LANGUAGE                               ENGLISH
     COLOR SYSTEM                               PAL
     SOUND SYSTEM                               BG
      SOUND MODE                              MEMORY
     NAME(EACH PR)                              ----
       TV/AV1/AV2                               TV




                                            -9-
CM-905S/SF TYPICAL SERVICE DATA




                             CM-905S/SF SVC KEY & FUNCTION DESCRIPTION
         TV/TEXT                                            TV
         LAST PR                                             1
         VOLUME
S12
      PICTURE SIZE                                   NORMAL ( 4:3 )
       CHILD LOCK                                       OFF
        CH LOCK                                         OFF



      SUB MENU
NO    NAME                 FUNCTION
 1    PIP ON / OFF (PIP)   ON/OFF display a sub-picture
 2    SWAP (PIP)           The main picture and sub-picture are swapped
 3    SIZE (PIP)           The sub-picture will be smaller. To return to be normal size, Press this button again.
 4    TV / VIDEO (PIP)     To select the input for the sub pictrue
 5    POSITION (PIP)       The display position of the sub-picture will changed
 6                         S2 DATA changed
                           RB                            128
                           GB                               0
      SCREEN               BB                               0
                           GG                              64
                           BG                              64
                           Brightness                      32
 7    DIGITAL EYE          DIGITAL DYE funtion ON/OFF
 8    ZOOM                 Picture size changed ( 4:3 -> 16:9 -> ZOOM -> 4:3 -> .... )
 9    TEXT                 TEXT funtion ON/OFF
10    CH UP                USING the SERVICE MODE to CH UP/DOWN
11    CH DOWN
12    RESISTER
13    RELEASE




                                                      - 10 -
SCHEMATIC DIAGRAM




                    - 11 -
  PRINTED CIRCUIT BOARD
PCB MAIN




                          - 12 -
MECHANICAL EXPLODED VIEW AND PARTS LIST
CAUTION

1. DTD-21D7




                    - 13 -
 MECHANICAL EXPLODED VIEW AND PARTS LIST



2. DTD-21D6




                                      - 14 -
                 MECHANICAL EXPLODED VIEW AND PARTS LIST



3. DTD-21D4




              - 15 -
 MECHANICAL EXPLODED VIEW AND PARTS LIST



4. DTD-21D3




                                      - 16 -
                 MECHANICAL EXPLODED VIEW AND PARTS LIST



5. DTD-21U6




              - 17 -
 MECHANICAL EXPLODED VIEW AND PARTS LIST



6. DTD-21U8




                                     - 18 -
 ELECTRICAL PARTS LIST
CAUTION
      "    " is safety component, so it must be used the same component.
      " 



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