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DAEWOO SP120 CHASSIS DSP5012LXE PLASMA TV Service Manual


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              S/M NO. : TSP120BEF2




50" PLASMA PDP MONITOR
CHASSIS : SP-120
MODEL : DSP-5012LXS




                          Jan. 2004
                                   Contents
A. Parts with the exception of MODULE
1. Safety Precautions                                                        3
2. Product Specification
  2-1. SPECIFICATION                                                         4
  2-2. Available Input Signal                                                6
3. BLOCK DIAGRAM                                                             8
4. Description Of Each BLOCK
  4-1. A/V BLOCK                                                             9
    4-1-1. A/V BLOCK DIAGRAM                                                 9
    4-1-2. VIDEO PCB                                                        10
    4-1-3. JACK PCB                                                         14
    4-1-4. KEY PCB                                                          15
    4-1-5. LED PCB                                                          15
  4-2. POWER PCB                                                            16
5. SERVICE MODE
  5-1. Entering SERVICE MODE                                                18
  5-2. Check initial data of Video PCB                                      18
  5-3. Description Of SERVICE MODE Items                                    19
6. Adjusting Method
  6-1. Adjusting WHITE BALANCE                                              23
  6-2. Adjusting POWER PCB                                                  23
7. SOFTWARE UPGRADE Method                                                  26
8. Main PCB Trouble Diagnosis                                               29
  8-1. VIDEO & JACK PCB Trouble Diagnosis                                   29
  8-2. POWER PCB Trouble Diagnosis                                          34
9. TROUBLE SHOOTING
  9-1. Facts You Must Know When Diagnosing And Repairing                    35
  9-2. Representative Symptoms When Each PCB Breaks Down                    35
  9-3. Trouble Diagnosis And Repairing Method For Representative Symptoms   36
10. ASSEMBLY LIST                                                           40
11. EXPLODED VIEW                                                           41

                                         -1-
B. Parts of MODULE
1. Safety Precautions                            2
2. Formation and Specification of Module         5
3. Adjustment                                    6
4. Trouble Shooting                              9
5. Block Diagram                                 14




                                           -2-
A. Parts with the exception of MODULE
1. Safety Precautions

1. Safety Precautions


(1) When moving or laying down a PDP Set, at least two people must work. Avoid any impact towards
    the PDP Set.


(2) Do not leave the broken PDP Set on for a long time. To prevent any further damages, after check the
    condition of the broken Set, make sure to turn the power (AC) off.


(3) When opening the BACK COVER, turn off the power (AC) to prevent electric shock. When a PDP
    is on, high voltage and high current exist inside the Set.


(4) When loosening screws, check the connecting position and type of the screw. Sort out the screws
    and store them separately. Because screws holding PCB are working as electric circuit
    GROUNDING, make sure to check if any screw is missing when assembling.

(5) If you open the BACK COVER, you will see a
   Panel Gas Exhaust Tube (Fig. 1). If this part is
   damaged, entire PDP PANEL must be replaced.
   Therefore, when working, be careful not to
   damage this part.




                                                                 Fig 1. Panel Gas Exhaust Tube


(6) A PDP Set contains a different kind of connector cables. When connecting or disconnecting
    connector cables, check the direction and position of the cable beforehand.


(7) When disconnecting connectors, unplug the connectors slowly with care. Especially when
    connecting/disconnecting FFC (film) cables or FPC cables, do not unplug the connectors too much
    instantaneously or strongly, and always handle the cables with care.


(8) Connectors are designed so that if the number of pins or the direction does not match, connectors
    will not fit. When having problem in plugging the connectors, make sure to check their kind,
    position, and direction.

                                                      -3-
2. Product Specification

2-1. SPECIFICATION
   ITEM                    SPECIFICATION                                            REMARK
1. GENERAL
   1-1. MODEL NO           DSP-5012LXS
   1-2. CHASSIS NO         SP-120
   1-3. SCREEN SIZE        50"(16:9)
   1-4. COUNTRY            Europe
   1-5. RESOLUTION         1,366(H) X 768(V)
   1-6. REMOCON TYPE       R-V28A(E)
   1-7. SAFETY STANDARD    CE(CLASS B), CB
2. MECHANICAL
   2-1. APPEARANCE
       1) WITHOUT STAND    WxHxD=1,222 x 738 x 93.8 mm
       2) WITH STAND       WxHxD=1,222 x 842 x 408 mm
   2-2. WEIGHT
       1) WITHOUT STAND    48 Kg
       2) WITH STAND       55 Kg
3. ELECTRICAL
   3-1. VIDEO INPUT        COMPOSITE (NTSC, PAL, SECAM, PAL-M/N, NTSC4.43)
                           & S-VHS (50/60Hz Y/C) 1 PORTS SCART(CVBS/RGB) 2ports
  3-2. DTV/DVD INPUT       1080i, 720P, 480P , 480i
                           (Y, Pb/Cb, Pr/Cr, COMPONENT SIGNAL) 2ports
  3-3. PC INPUT            VGA ~ UXGA (15 PIN D-SUB) 1 PORT
  3-4. DVI INPUT           DVI-D Input(DVI JACK) 1 port
  3-5. SOUND INPUT         VIDEO 3ports, DTV/DVD 2 ports,PC 1 port,DVI 1 port
  3-6. SPEAKER OUTPUT      8W(R) + 8W(L)
  3-7. POWER REQUIREMENT   AC 100V~240V, 50/60Hz
  3-8. POWER CONSUMPTION   550W
  3-9. RS-232 CONTROL      RS-232 COMMUNICATION (EXTERNAL UPGRADE)
  3-10. FUNCTION
      1) SCALING           *PC: H/V SIZE AND POSITION ADJUSTMENT
                           *VIDEO : AUTO, 16:9, PANORAMA, ENLARGE LB, ENLARGE LBS
                           *DTV/DVD : AUTO,16:9
     2) ZOOM                20 STEP ZOOM
     3) OSD                11 LANGUAGES (ENGLISH, KOREAN, GERMAN, ITALIAN,
                           DUTCH, PORTUGUESE, SPANISH, MEXICAN, RUSSIAN,
                           CHINESE, FRANCH)
     4) OTHERS             STILL, SLEEP MODE , SOUND MODE




                                         -4-
                                                                         Product Specification




ITEM                           SPECIFICATION                                        REMARK
4. OPTICAL
    4-1. SCREEN SIZE           50"(127Cm) DIAGONAL
    4-2. ASPECT RATIO          16:9
    4-3. NUMBER OF PIXELS      1,366(H)X768(V)
    4-4. DISPLAY COLOR         1,677 COLOR( EACH 8BITS FOR RGB )
    4-5. CELL PITCH            0.28(H)X0.81(V) Standard for green cell
    4-6. PEAK LUMINANCE        360cd/m2(With filter glass)
    4-7. CONTRAST RATIO        1000:1(Dark Room)
    4-8. VIEWING ANGLE         160(VERTICAL/HORIZONTAL)
5. USERCONTROL & ACCESSORIES
    5-1 CONTROL BUTTON(SET)    AC POWER BUTTON(PUSH-PULL S/W)
                               MENU, SELECT, UP, DOWN, LEFT, RIGHT(SOFT S/W)


  5-2. REMOTE CONTROL          POWER, INPUT SELECT, CONFIRM (or OK),
         ( R-V28A(E) )         EXTENSION -, EXTENSION +, MENU, UP, DOWN,
                               VOLUME UP, VOLUME DOWN, SILENCE, PICTURE
                               MODE, PICTURE STILL, PICTURE SIZE, SOUND
                               MODE, TIMER SLEEP


  5-3. ACCESSORIES             REMOTE CONTROLLER,BATTERY,INSTRUCTION MANUAL,
                               A/V CABLE, PC CABLE, POWER CORD
                               OPTION : STAND WALL HANGER, SPEAKER R/L




                                             -5-
Product Specification


2-2. Available Input Signal
 (1) PC

 Resolution       H Freq. (KHz)    V Freq. (Hz)       Remark       Patt No.
  640x350             31.469           70.1            IBM           203
                      37.861           85.1           VESA            11
  640x400             24.823           56.4            NEC            15
                       30.48           60.0            PGA           871
                      31.469           70.1         IBM (DOS)        204
                      37.861           85.1           VESA            16
  640x480             31.469           59.9            DOS            17
                         35            66.7          Macintosh        18
                      37.861           72.8           VESA            19
                        37.5           75.0           VESA           20
                      39.375           75.0            IBM            21
                      43.269           85.0           VESA            22
  720x400              31.47           60.0            VGA           876
                      31.469           70.1            IBM            13
                      37.927           85.1           VESA            14
  720X480              31.54           60.0            480P          953
  720X576              15.63           25.0            PAL           950
  800x600             35.156           56.3           VESA            23
                       35.16           57.2           VESA           24
                      37.879           60.3           VESA            24
                      48.077           72.2           VESA            25
                      46.875           75.0           VESA            26
                      53.674           85.1           VESA            27
  832x624             49.726           74.0          Macintosh        28
 1024x768         48.193(48.077)    59.3(59.8)    Macintosh(OAK)      29
                      48.363           60.0           VESA           30
                       53.95           66.1            XGA           890
                      56.476           70.1         HP&VESA           31
                      60.241        74.9(74.6)       Macintosh        32
                      60.023           75.0           VESA            33
                      68.677           85.0           VESA            34
                       80.66          100.0           Fujitsu        939
                       70.84           84.0            SUN           926
 1152X864                54            60.0            VAX           936
                      63.851           70.0           VESA            35
                        67.5           75.0           VESA           36
                      77.094           85.0           VESA            37
 1152x900             61.796           66.0            SUN            38
                      71.713           76.0            SUN            39
 1280X720                45            60.0            720P          954
 1280X960                60            60.0           VESA            40
                         75            75.0           VESA            41
                      85.938           85.0           VESA           42

                                       -6-
                                                 Product Specification




 Resolution     H Freq. (KHz)   V Freq. (Hz)     Remark        Patt No.
 1280X1024         46.433          43.4           VESA           205
                   63.981          60.0           VESA            44
                    70.66          66.5           VAX            937
                    74.88          70.0           NEC            921
                   78.125          72.0        HP & HITA         206
                   78.855          74.1        Sony & NEC         46
                   79.976          75.0           VESA            47
                    81.13          76.1           SUN            927
                   91.146          85.0           VESA            48
 1600X1200           62.5          48.0           VESA
                      75           60.0           VESA            50
                    81.25          65.0           VESA           862
                     87.5          70.0           VESA           863
                    93.75          75.0           VESA           864
                     100           80.0           VESA           865

(2) DTV
-1080i/ 60 Hz
-720P / 60 Hz
-480P / 60 Hz

(3) VIDEO
-PAL, PAL-M, PAL-N
-NTSC , NTSC4.43
- SECAM




                                    -7-
3. BLOCK DIAGRAM




                   -8-
4. Description Of Each BLOCK

4-1. A/V BLOCK
   4-1-1. A/V BLOCK DIAGRAM




                                                                          8

                                                                                7




                                                                                                                                1




                                                                                                                                                                           1
                                                                                       6

                                                                                              5

                                                                                                      4

                                                                                                              3

                                                                                                                       2




                                                                                                                                               5

                                                                                                                                                       4

                                                                                                                                                              3

                                                                                                                                                                      2
                                                                          GND

                                                                                E33V

                                                                                       GND

                                                                                              DATA2

                                                                                                      DATA1

                                                                                                              COLUM3

                                                                                                                       COLUM2
                                                                                                                                COLUM1




                                                                                                                                               STB5V

                                                                                                                                                        GND

                                                                                                                                                              LED_P

                                                                                                                                                                      IR
                                                                                                                                                                           GND
                                                                                             P601                                                         P602
                             P603
                                         1     RA1-   GND
                                 2                    RA1+          DEN
                                               RB1-
                                                      RB+      S_RESET
                                               GND                                                                                                                               VVS
                                                      RC-
                                               RC+              V_MUTE
                                               RCLK1+ RCLK1-     DVS                   IC600                                                     IC406
                                               RD1+   RD1-
                                                      GND        DHS                   PW171                                                   DPTV-MVS                          VHS
                                               RD2-
                                               RA2+   RA2-
                                               RB2+   RB2-
      to                                       RC2-   GND                                                                       VPEN1
                                               RCLK2- RC2+
   DIGITAL                                     RD2-   RCLK2+                                                                                                  VPEN
                                               GND    RD2+
                                                                           GBLKSLP            GPEN            GSOG
                                               SDATA DISPEN
                                 39            SLE    SCLK                                                                                               DECOE
                                         40           GND                 GHSFOUT            GCOAST GREF


                                                       DCLKB                                                                                     IC401
                             PA5                                                                                                                SAA7118
                                 5       STB5V

                                 4       GND
                                                       GCLK                      IC500
                                 3                                                                                                                                    CCOMB
                                                                                CXA3516
   to PWR                        2       POWER_CLT
                                                               GHS
                                                                                                                                                                           YCOMB
                                 1       LED_P

                                                         GVS
                             PA4                                                                                                                        IC400
                                 10      STB5V                                                                                                         u64083
                                 9       LED_P

                                 8       GND

                                 7       GND                                                                                             VIN
                                                               G/Y_DTV




                                 6       P5V
                                                               Y_DVD
                                                               R/PR
                                                               B/PB
                                                               GND

                                                               GND

                                                               GND

                                                               GND

                                                               GND

                                                               GND

                                                               GND

                                                               GND

                                                               GND
                                                               GND

                                                               GND

                                                               GND
                                                               GPC
                                                               HPC




                                                               RPC
                                                               VPC


                                                               BPC




                                 5       GND
                                                               CO
                                                               CR



                                                               YO
                                                               CB




                                 4       GND
   to PWR
                                                               MSP_RST
                                                               S_MUTE




                                                                                                                                                                                                          to PWR
                                                               FB_SC




                                 3
                                                               G_SC




                                         P12V
                                                               R_SC



                                                               B_SC
                                                               P12V
                                                               P12V


                                                               SEL1
                                                               SEL2
                                                               SEL3
                                                               GND
                                                               GND



                                                               GND


                                                               GND


                                                               GND
                                                               GND

                                                               GND

                                                               GND



                                                               GND
                                                               RXD
                                                               SDA

                                                               TXD
                                                               SCL




                                                               VIN




                                 2       P12V
                                                        P502




                                         NUL                   1                                                                         25
                                 1
                                                               26                                                                        50




                                                               26                                                                         50                                                 1   2     3   4

                                              JACK             1                                                                          25
                                                                                                                                                                                                 PA6
                                              PCB                                 PA502
                                                                                                                                          R_OUT                                    RIGHT
                                                                                                                                                   L_OUT                                                   LEFT


                                                                                                                                                                            IC702                     IC701
                                                  IC706                            IC704                                                   IC700                           TDA7480                   TDA7480
                                                 CXA2151                          CXA2069                                                 MSP3420




     1   2   3   4   5   6   7       8
                                                                                                                                                                                                 1    2    3      4   5   6
                         PA601
    KEY PCB
                                                                                                                                                                                       LED                     PA602


                                                                                              -9-
Description Of Each BLOCK


  4-1-2.VIDEO PCB
     - PROCESS Various Signal (PC, COMPONENT, COMPOSITE ) to produce 24BIT DIGITAL
       output
     (1) IC and TP
        (1) IC400(UPD64083)
        -Using 3D COMBFILTER to separate COMPOSITE signal to Brightness
         Signal(Y) and Color Signal(C)

      *TP ( Input : COLOR BAR PATTERN )
            A. YCOMP : Brightness Signal(Y)




        B. CCOMP : Color Signal (C)




      (2) IC401 (SAA7118E)
      -Receive NTSC, SECAM and PAL VIDEO by COMPOSITE(V) , S-VHS(Y.C)
      COMPONENT (Y Cb Cr) and process signal

      *TP
            A. DECOE : CHIP ENABLE part. When signal process is done by IC401, DC 3.3V is
                       measured.




                                          -10-
                                                              Description Of Each BLOCK


(3) IC406(DPTV-MVS)
   -A Scan Rate Converter which converts Interlace signal into Progressive signal

  *TP
        A. VVS : VERTICAL SYNC (output of DPTV-MVS)




  B. VHS : HORIZONTAL SYNC (output of DPTV-MVS)




  C. VCLK : CLOCK (output of DPTV-MVS)




                                            -11-
Description Of Each BLOCK


    (4) IC500(CXA3516R)
       -3-channel 8-bit 165MSPS A/D converter which process PC , DTV signal

      * TP
             A. GCOAST : COAST CONTOL Signal for PLL (input of CXA3516)




      B .GHS : HORIZONTAL SYNC for GRAPHIC (output of CXA3516)




      C. GCLK : CLOCK for GRAPHIC (output of CXA3516)




                                             -12-
                                                 Description Of Each BLOCK


  D. GFBK : SYNC for PLL




(5) IC600(PW171)
   - Image processor IC

  *TP
        A. DEN : DATA ENABLE (output of PW171)




  B. DHS : HORIZONTAL SYNC (output of PW171)




                                     -13-
Description Of Each BLOCK


       C.DVS : VERTICAL SYNC for DISPLAY (output of PW171)




       D. DCLKB : CLOCK for DISPLAY (output of PW171)




  4-1-3. JACK PCB
      - Separate and process various VIDEO and AUDIO signal
      (1) IC706 (VIDEO /SYNC SELECTOR)
             - This chooses Y Cb/Pb Cr/Pr or RGB signal to output Y Cb/Pb Cr/Pr, to separate SYNC,
              and to perform SYNC COUNTER.

      (2) IC704 (AUDIO/VIDEO SWITCH)
             - The IC perform AUDIO or VIDEO SWITCHING

      (3) IC715 (DIGITAL CONTROLLER)
             - DVI CONTROLLER

      (4) IC721 (INPUT SELECTOR SWITCH)

             - SCART (RGB) SELECTOR SWITCH

      (5) IC700 (MULTI STANDARD SOUND PROCDSSOR)
             - AUDIO SINGNAL VOLUME control, EQUALIZER control


                                               -14-
                                                        Description Of Each BLOCK


  *TP
        R_OUT(L_OUT) : AUDIO SIGNAL that goes into MSP3420 before AUDIO
        PROCESSING




(4) IC701 .IC700 (TDA 7480)
   *TP
        A. RIGHT(LEFT) :AMP input signal before 30dB amplification




4-1-4.KEY PCB
   - Input PCB using KEY
4-1-5.LED PCB
   - PCB for REMOCON CONTROL




                                        -15-
Description Of Each BLOCK


4-2. POWER PCB
1. Input Specification
1.1 Input condition
             Standard Voltage Range                                 AC 100V ~ 240V
             Available Voltage Range                                 AC 85V ~ 276V
                Frequency Range                                   50Hz ~ 60Hz ( 10%)

1.2 Others
                       Item                       Specification                        Test Condition
                    Efficiency                     85% Min                               AC 220V
                                                                                        At Full Load
               Inrush Current                    40A peak-peak                         AC 85V ~ 276V


2. Environment condition
2.1 Ambient temperature and humidity

                       Storage temperature                               -20    ~ 60
                      Operation temperature                     -10      ~ 50    (AMBIENT)
                     On/Off test temperature                             -20 ~ 60
                        Storage humidity                                  10% ~ 90%
                       Operation humidity                                 10% ~ 90%

3. Output Specification
3.1 Output Voltage & Load Condition
              No.       Output     Output      Variable       Voltage            Output         2)*3Ripple &
                        Name       Typical      Voltage      Tolerance          Current(A)      Noise (Vp-p)
                                     (V)       Range(V)         (%)         Min.        Max.
Vsc Board      1     5V Stand_by     5.0           -               5        0.03         1.0      200/950
(Signal        2         5V          5.2           -               5        0.5           4.5     200/950
Interface)     3         12V          12           -               5          0           1.6     200/850
               4                    +17            -               5         0           0.7      200/850
                        Vaudio
               5                     -17           -               5         0           0.7      200/850
               6         33VT         33           -               7          0          0.05     200/850
*1PDP          7         5Vctrl      5.2           -               5        3.0          7.5      200/950
 Module        8          Va          60        55~66             1V       0.005         1.6      550/1V
               9          Vs        190             10            1V        0.1           2.2     550/1V




                                                      -16-
                                                             Description Of Each BLOCK


3.2 Output protection
  No.    Output          Output          *2Over Current   *3Over Voltage   Short circuit
          Name          Typical(V)        Protection(A)    Protection(V)    protection
   1       *1
              5V           5.0             Short test
        stand_by                           protection
   2      5Vctrl           5.2            13.0 or more       5.5~7.0
   3         5V            5.2
   4        12V             12            1.76 or more       13~17
   5     Vaudio            +17             1.0 or more       19~24         No hardware
   6                       -17             1.0 or more      -19 ~ -24         failure
   7     33VT               33            0.08 or more       36~44
   8      Va                60             1.86 ~ 3.30       67 ~80
   9      Vs               190             2.42 ~ 4.25      205~230

4. Input/Output pin assignment & specification




                                                 -17-
5. SERVICE MODE

5-1. Entering SERVICE MODE


  Push "UP"        "MUTE"         "DISPLAY"       "MUTE" BUTTON of Remote Controller to enter
  SERVICE adjustment MODE.


5-2. Check initial data of Video PCB

  (1) Check initial data of User Menu
     1) Picture
     - Mode : Normal
           BRIGHTNESS : 35
           CONTRAST : 47
           COLOR : 32
           TINT : 0 (CENTER) * Not displayed when PAL or SECAM input
           SHARPNESS : 4
     - Color Temp. : Normal
     2) Sound
     - Balance : 0 (CENTER)
     - Spatial Effect : Off
     - Sound Mode : Normal
           120 Hz : 0 (CENTER)
           500 Hz : 0 (CENTER)
           1.5 KHz : 0 (CENTER)
           5 KHz : 0 (CENTER)
           10 KHz : 0 (CENTER)
     3) Screen Mode : Normal
     4) Utility
     - Background : Opaque
     - Language : English ( selected when Power ON by user just after manufacturing )
     - ISM
           Pixel Shift : Off
           Low Bright : Off
           Image Invert : Off
     5) Input
     - DSP-4222, DSP-5012:AVI(SCART)
     - DSP-4220/24, DSP-5010/14:VIDEO1

  (2) Check initial data of Service mode
     1) PW 171
     - Sub-Brightness : 28
     - Sub-Contrast : 40
     - Bias R : 60
     - Bias G : 60
     - Bias B : 68


                                                -18-
                                                                                SERVICE MODE


     - Gain R : 70
     - Gain G : 70
     - Gain B : 64

  2) SAA 7118
     - Sub BRT : 128
     - Sub CONT : 50
     - Sub CLR : 55
     - Sub TINT : 0
     - Sub SRP : 10

  3) DPTV
     - Sub BRT : 61
     - Sub CONT : 16

  4) CXA 3516
     - Sub CONT : 58
     - Cb OFFSET : 39
     - Cr OFFSET : 37
     - HYS    :3
     - THRSLD : 14

  5) MSP34X0
     - PRESCALE : 22

  6) MISC
     - AT PWR : OFF
     - JACK : Scart(Normal)
     - PXL SFT : OFF

  7) PANEL
     - ISM : OFF
     - BWINV : OFF
     - GAMMA : 2.2
     - BRIGHT : 100 %
     - SCROLL : OFF
     - P SAVE :100 %
     - MOVING : AV
     - STILL : AV

5-3. Description of SERVICE MODE Items

  1) PW171 : It is a Image processor and used to adjust White balance.
     [Note] This article is for adjustment after replacement of VIDEO PCB. These values may vary
            from set to set. Therefore if these values are recorded before replacing VIDEO PCB, you do
            not need to adjust WHITE BALANCE additionally. The setup can be done using the
            recorded values.

                                                -19-
SERVICE MODE



   (1) SUB BRT : For BRIGHTNESS adjustment (fixed)
   (2) SUB CONT : For CONTRAST adjustment (fixed)
   (3) BIAS R : For R BIAS adjustment (Changeable)
   (4) BIAS G : For G BIAS adjustment (Changeable)
   (5) BIAS B : For B BIAS adjustment (fixed)
   (6) GAIN R : For R GAIN adjustment (Changeable)
   (7) GAIN G : For G GAIN adjustment (Changeable)
   (8) GAIN B : For B GAIN adjustment (fixed)

 2) SAA7118 : It is a VIDEO DECODER and used to adjust a picture quality for VIDEO/DVD(480i).
    [Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
           change initial values.

   (1) SUB BRT : For BRIGHTNESS adjustment (VIDEO/DVD) (fixed)
   (2) SUB CONT : For CONTRAST adjustment (VIDEO/DVD) (fixed)
   (3) SUB CLR : For COLOR adjustment (VIDEO) (fixed)
   (4) SUB TNT : For TINT adjustment (VIDEO) (fixed)
   (5) SUB SRP : For SHARPNESS adjustment (VIDEO) (fixed)

 3) DPTV : Be used to adjust DEINTERLACE performance.
    [Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
           change initial values.

   (1) SUB BRT : For BRIGHTNESS adjustment (VIDEO/DVD) (fixed)
   (2) SUB CONT : For CONTRAST adjustment (VIDEO/DVD) (fixed)

 4) CXA3516 : It is a DTV/PC PROCESSOR and used to adjust a picture quality for DTV/PC.
    [Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
           change initial values.

   (1) SUB CONT : For CONTRAST adjustment (fixed)
   (2) Cb OFFSET : For Cb Offset adjustment (fixed)
   (3) Cr OFFSET : For Cr Offset adjustment (fixed)
   (4) HYS : For Sync hysteresis adjustment (fixed)
   (5) THR SLP : For Sync threshold adjustment (fixed)

 5) MSP34X0
    [Note] This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
           change initial values.

   (1) PRESCLE : Be used to adjust a Audio prescale.

 6) MISC

   (1) TST PTRN AT : Cycled patterns from R          G   B   WH every 1 minute automatically.


                                              -20-
                                                                                  SERVICE MODE


   (2) TST PTRN MA : Cycled patterns from BK            WH       R       G    B by pressing volume up key
   (3) AT PWR : ON - Condition where turning AC power on, automatically turns the SET on.
       OFF - Condition where turning AC power on makes the Set STAND BY, and POWER of
              Remote-controller on turns the set on from STAND BY state.
   (4) JACK : Set up depending on input MODE of JACK BOARD
        - SCART(Normal) : MULTI + DVI + SCART (DSP-4222LVS, DSP-5012LXS)
        - MULTI : Used by DSP-4280 series, Multimedia monitor.
        - MONITOR : Used by DSP-4282 series, PC only monitor.
        - MONITOR+ : Used by DSP-4282 series with DSP-JU20 attached, PC only monitor with
                          External board connection.
        - DVI : MULTI + DVI, Used by DSP-4284 series, DSP-4220/4224LVS and DSP-5010/5014LXS
        - VIDEO : Video only monitor
      [Note] Wrong setup causes displaying problem. So you must be careful when SETTING.
   (5) PXL SFT : To choose a picture auto shift mode to protect a PDP(Ghost fault)
      ON - Moving screen up, down left and right by some Pixels every 20 seconds.
       OFF - Fixing PIXEL position. No movement on screen.
      [Note] PIXEL SHIFT function is solution to characteristic phenomenon of PDP, so-called
              "Image Sticking" problem. Leave this function ON, when displaying many fixed screen
              like PC screen. When this function is ON the screen will move a little for every fixed
              interval but a human eye can not recognize it well.
7) INFOR
   (1) VER : MICOM VERSION
       (year 4 digits, month 2 digits, date 2 digits and time 4 digits : 200309222030 )

8) RESET
   (1) EDID SET
   [Note] Be used to set to write EDID data (After setting it is changed to "EDID DONE"). Before
          setting EDID, you have to short jumpers of JP710. After setting, you must remove jumpers,
          and then, turn off and on main power. If "EDID WRITING ERROR" is displayed, Try
          again. But, in DEUK, you don't have to set EDID set (After removing jumpers, EDID
          DONE is changed to EDID SET).
   (2) LEVEL 1 : Be used to initialize all of the data including adjusted figures for W/B.
   (3) LEVEL 2 : Be used to initialize all of the data except adjusted figures for W/B
   (4) FACTORY : For User menu initialization, is actaviated by choosing a language on AC ON
       mode. (Menu Display, VOL, OSD Background and Input mode (VIDEO 1) initialization).

9) PANEL
   (1) ISM : Used to minimize Image
             Sticking (ON/OFF).
       ON : When Still images or regular
            patterns have been displayed
            on screen for some times, the
            luminance of screen is going
            to decrease as below. (But,
            only when pattern area is over
            50% and it is lasting over 5
            minutes)

                                                 -21-
SERVICE MODE

   (2) BWINV : Used to minimize Image Sticking
                  (ON/OFF)                                        Table         Gamma Contents
   ON : Inverting the original images.(in Digital image             1             =2.2(default)
         data, "0"     "1", "1"    "0")                             2                  =1
    * If Still images have been displayed for some                  3                 =2.0
      periods, this function can minimize Image sticking,           4                 =2.4
      by displaying it on BWINV mode for some times.
   (3) GAMMA : can choose one in 4 gamma tables
   (4) BRIGHT : Adjusting Peak Luminance
      1. 100% : Full Peak Luminance
      2. 63% : 63% of Peak luminance
      3. 40% : 40% of Peak luminance
        (* See the graph right)
      4. APL: Average Picture Level




   (5) SCROLL : Minimizing Image Sticking (ON/OFF) by Shifting whole screen BRIGHT :
                    Adjusting Peak Luminance. (same with PXL SFT function in 6)MISC)
                       ON : This function moves1~8 pixel with a regular rule, up, down, left, right every
                       10 sec
   (6) BRIGHT : Adjusting Peak Luminance
   (7) P SAVE : Controlling power consumption by changing Luminance level of whole screen.
      1. 100% : Peak Luminance & Maximum Power Consumption mode
      2. 87% : 87% mode
      3. 75% : 75% mode
      4. 50% : 50% mode
      5. linear : linear mode(Constant luminance without regard to APL)
      * WARNING!! The choice of these modes can cause difference of Power Consumption.
      * See the below




   (8) MOVING : Setting display mode of Input channel except PC input.
   (9) STILL : Setting display mode for PC input.

                                                 -22-
6.Adjusting Method

6-1. Adjusting WHITE BALANCE
   1) Apply 5 Step Gray Scale pattern to Video input terminal
      (MIK 7253S PATTERN NO.9)




                                        Fig. 2 5 Step Gray Scale Pattern
  2) Check initial data of User Menu ( refer to 5-2 )
  3) To enter Service mode, press button "up > mute > recall > mute" on the remote controller and
     select PW171, then check initial data of Service mode( refer to 5-2 ).
  4) Attach a sensor of White Balance Meter(CA-100) to 80% of white level on the screen.
  5) Adjust White Balance by varying Gain of R,G,
  * Gain of R, G, should be adjusted to DP+ 10 ,if beyond these then that is a specification fault
  * Coordinate of Color is x=0.280 + 0.005, y=0.290 + 0.005 and the Color Temperature is over 10,000-
    degree K.
  6) Attach a sensor of White Balance Meter to 40% of white level on the screen
  7) Adjust White Balance by varying the values of R,G,
  * Values of R,G, should be adjusted to DP + 5 ,if beyond these then that is a specification fault
  * Coordinate of Color is x=0.280 + 0.005, y=0.290 + 0.005.
  8) Repeat No 4) to No 7) until getting that Coordinate of Color is x=0.280, y=0.290, and then adjust
     Sub Contrast to over 150 Cd/m square after attaching a sensor of White Balance Meter to 100% of
     white level on the screen.
  9) To exit from Service mode, press Menu button on the remote controller.

6-2. POWER ADJUSTMENTS
   * Video pattern condition : 100 IRE Full White Pattern
   * POWER PCB Adjustments mean that you should set the following 2-type power voltages to the
     values which were already adjusted by PDP module (LG Module) maker. Therefore, if there are
     some problems in picture after adjusting, you should classify that PDP module as a fault and contact
     to PDP module maker.

  1. Vsus (SUSTAIN Voltage) : Discharge Sustain Voltage
      Measurement equipment : Digital Volt Meter ( DC Volt mode )
      Adjusting TP : TP3 (See Fig. 4, GND TP:TP2)
      Adjusting Location : VR1(See Fig. 4)
      Adjusting Voltage : Voltage which is written in Label which is at upper center side of PDP
      Module(Vs). (Typical Voltage : 192 V - Fig. 3)



                                                  -23-
Adjusting Method




                       Fig. 3 Power Connection and Voltage Adjustment Label
  2. Vadd (ADDRESS Voltage) : DATA Input Voltage
       Measurement equipment : Digital Volt Meter (DC Volt mode)
       Adjusting TP : TP1 (See Fig. 4, GND TP:TP2)
       Adjusting Location : VR5 (See Fig. 4)
       Optimum Adjusting Voltage : Voltage which is written in Label which is at upper center side of
       PDP Module(Va). (Typical Voltage : 60V - Fig. 3)




                                                 -24-
                                 Adjusting Method




Fig. 4 Power Adjustment Points




             -25-
7.SOFTWARE UPGRADE Method

1. Connect the JACK PCB to the Video PCB.
2. Connect 9 PIN serial cable to the serial port of the computer.
3. Connect the opposite end of the serial cable to RS-232C port of Jack PCB.
4. Run Flashupgrader.exe in PC and then push "Next(N) >" button.




5. Select current Upgrade file
   - Click "Browse" button to select the file you want to upgrade.




                                                   -26-
                                                            SOFTWARE UPGRADE Method


  - Select the file (pwSDK.inf) you want to upgrade and Push "Open(O) >" button.




6. Select as above and push "Next(N) >" button.

7. Select Comm Port and Baud Rate and push "Next(N) >" button.




                                                  -27-
SOFTWARE UPGRADE Method


8. Upgrade process will be displayed. Turn on the ac power and then upgrade program will initiate the
   download.




9. When all files upgrade are complete, a window (below) will be opened. Push "Finish" button to
   complete the process.




                                                -28-
  8. Main PCB Trouble Diagnosis

  [NOTE] See "B. PARTS of MODULE" of this service manual for the trouble diagnosises concerned to
         MODULE with exception of VIDEO, JACK and POWER parts.
8-1. VIDEO & JACK PCB Trouble Diagnosis
   1. Common checking process when "No signal" or "No raster"

                   Check start

                               Y


                                                                                                            N       1. Confirm AC connection
                                                       N                            Is there a weak                 2. Confirm Power S/W ON
              Does "No signal" screen
                                                                                   discharge on the                 3. Check other PCBs
                     appear?
                                                                                        screen?                        (Refer to B. Parts of Module)

                                                                                               Y
                               Y
                                                                                                            N
                                                                                    Is P604 correctly                      Check P201
                                           N       Check the connection of             connected?
                Is the signal input Jack
                 correctly connected?              Jack(PDP or AV devide)

                                                                                               Y
                               Y
                                           N                                     Is DVS, DHS, DCLK of           N
                   Does input source                                                                                    Exchange Video PCB
                 (AV device)operate?
                                                    Operate AV device             Video PCB normal?


                               Y                                                               Y
                                               N      Confirm input          1. Check other PCBs (CTRL_LVDS,
              Is input selection in used                                        Y/Z-SUS, CONNECTION PCBs...)
                                                       selection
                        mode?                                                2. Reassemble or change P201


                               Y
              Exchange Video or Jack PCB


  2. When No VIDEO SCART(AV1, AV2), COMPOSITE(AV3), S-VIDEO(AV3), Y Cb Cr) signal on screen
     (1) Input PC or DTV signal and see if PC or DTV signals shown on screen.
           If no signal, check TP DCLK, DHS and DVS signal.
           If DCLK, DHS and DVS signal do not appear, VIDEO PCB has a trouble.
     (2) When Y Cb Cr input : Check 16th pin of P502.




                                           COMPOSITE Input : Check TP Vin.


                                                                      -29-
Main PCB Trouble Diagnosis




              S- VHS input : Check 24th pin of P502 (when COLOR BAR PATTERN).




                 If above signal do not appear, JACK PCB has a trouble.
    (3) TP DECOE Check
         If DECOE signal do not appear, JACK PCB has a trouble.
        (cf. When COMPOSITE NTSC 3.58MHz, check TP COMB. CCOMB as well)

    (4) Check TP VVS, VHS, VCLK and VPEN1
         If VVS, VHS, VCLK and VPEN1 signal do not appear, JACK PCB has a trouble.

  3. When DTV (1080i, 720P, 480P) signal do not appear on screen
     (1) Input PC or VIDEO signal and see if PC or VIDEO signals shown on screen.
           If no signal, check TP DCLKB, DHS and DVS.
           If DCLKB, DHS and DVS signal do not appear, VIDEO PCB has a trouble.

    (2) Check P502's 1st PIN(V SYNC) , 2nd PIN(H SYNC) check-




         If above signals do not appear, JACK PCB has a trouble.
    (3) Check TP GHS, GVS and GCLK.
         If GHS, GVS and GCLK signal do not appear, JACK PCB has a trouble.
                                               -30-
                                                            Main PCB Trouble Diagnosis

4. When PC signal do not appear on screen
   (1) Input DTV or VIDEO signal and see if DTV or VIDEO signals shown on screen.
         If no signal, check TP DCLKB, DHS and DVS.
         If DCLKB, DHS and DVS signal do not appear, JACK PCB has a trouble.
   (2) Check 1st PIN (V SYNC), 2nd PIN (H SYNC) of P502 (when 800 x 600).




        If above signal do not appear, JACK PCB has a trouble.
  (3) Check TP GHS, GVS and GCLK.
       If GHS, GVS and GCLK signal do not appear, JACK PCB has a trouble.

5. When No Sound




                                            -31-
Main PCB Trouble Diagnosis


  6. When Key does not operate


                              Check start


                                            Y
                                                                  1. Confirm AC connection.
                        Does LED next to Power                N   2. Confirm Power S/W ON.
                                                                  3. Check other PCBs
                          S/W turn on in Red?


                                      Y

                                                              N   1. Check the connection to Video PCB.
                               Does LED
                                                                  2. Check the Video PCB or other PCBs.
                           turn on in Green?


                                      Y
                                                                  N      1. PA601 CONNECTOR has a trouble.
                   Is 2nd pin of P601 output normal?                     2. Exchange Key PCB.



                                      Y
                          Check VIDEO PCB




                                                       -32-
                                                                                 Main PCB Trouble Diagnosis


7. When Remote Controller does not operate


                               Check start

                                        Y
                                                                        1. Confirm AC connection.
                         Does LED next to Power                N        2. Confirm Power S/W ON.
                           S/W turn on in Red?                          3. Check other PCBs.


                                        Y

                                                         N        Check the Battery of
                         Does Remote Controller                    Remote Controller
                               operate?


                                        Y
                                                         N         1. Check the connection to VIDEO PCB
                          Does Set turn on with                    2. Check VIDEO PCB
                             Key operation?

                                        Y

                     Whenever push the botton of                            LED PCB has a trouble.
                                                                    N       So, Exchange LED PCB
                   remote controller, does 2nd Pin of
                            P602 output?

                                         Y

              1. IR Receiving BLOCK of VIDEO PCB has a trouble.
              2. Check VIDEO PCB




                                                        -33-
Main PCB Trouble Diagnosis


8-2. POWER PCB Trouble Diagnosis

     Although Z-SUS / Y-SUS / SCAN / DATA COF (refer to B. PARTS of MODULE) are checked,
     but still the set does not operate, and then check if Trouble Symptoms of the following Power PCB
     appear.

        After unplugging Power Connectors of Z-SUS / Y-SUS PCB(P805A, P806A) and checking
        remaining voltage, there still exist several tens of remaining voltage.

        When output condition of Power Module is set to low-voltage, output voltage table lists 1~7
        are NOT normal. Or when set to high-voltage, output voltage table list 8~9 are NOT normal.
        (Refer to 4-2)

         When output condition of Power Module is set to low-voltage, output voltage table lists 1~7
         are normal. But when set to high-voltage, output voltage table list 1~2 are NOT normal.
         (Refer to 4-2)

        After turn on the PDP set with Remote Controller, when output condition of Power Module is
        set to high-voltage, the LED turn "Green" but the "Power Shut Down" happens after 2~3
        seconds.


     If high voltage (Vsus, Vadd) measured from Power PCB is different from that of optimum
     adjusting voltage label, re-adjust the voltages referring to "A. 6-2. POWER Adjustments"




                                                -34-
9. TROUBLE SHOOTING

  [NOTE] See "B. PARTS of MODULE" of this service manual for trouble shooting concerned to
         MODULE with exception of VIDEO, JACK and POWER parts.

9-1. Facts you must know at trouble diagnosis or repairing
   (1) The trouble diagnosis and repairing of set means "Module Exchange". In other words, find out
       which PCB modules are not working and replace them with normal PCB modules. Do not need to
       fix broken PCB modules in themselves.
   (2) This TROUBLE SHOOTING list only contains representative and simple PCB trouble diagnosis
       and Module Exchange method. Therefore, if you find Sets that are difficult to diagnose or to
       repair, contact Daewoo Electronics.
   (3) Basic TROUBLE SHOOTING procedure
       Check Trouble Symptoms           Detach BACK COVER             Trouble Diagnosis    Replace broken
       PCB module         Adjust new PCB module (when replacing Z-SUS, Y-SUS, POWER,
      VIDEO PCB, need Adjusting Procedure. Refer to A.6. Adjusting Method and B.3. Adjustments)
           HEATRUN(for at least 30 minutes, input TEST PATTERN FULL WHITE), FUNCTION
       CHECK          Repair Complete.
   (4) Keep broken PCB modules separately for replacing with new PCB modules.
   (5) Required equipments for trouble diagnosis
      - DIGITAL MULTIMETER (User Mode : measure DC VOLTAGE, measure DIODE VOLTAGE,
        SHORT-OPEN TEST )
      - Screwdriver (or electric screwdriver), plastic adjusting tool
   (6) Each BLOCK operation was explained including DIGITAL OSCILLOSCOPE signal, but this is
       reference only and applying them for repair is not necessary. (After additional education, DIGITAL
       OSCILLOSCOPE could be used)
   (7) Before assemble/disassemble PCBs, check to see if AC Switch is "OFF".
   (8) After replacing Z-SUS, Y-SUS, POWER, VIDEO PCB, the PCB needs extra adjustment. (Refer to
       A.6. Adjusting Method and B.3. Adjustments)
   (9) After the set is repaired, leave BACK COVER open for followings. Do HEATRUN for at least 30
       minutes by inputting TEST PATTERN of SERVICE MODE (Refer to Service Manual A.5. Service
       Mode) FULL WHITE. Check the screen conditions and basic functions (remote control operation
       etc.).
   (10) After BACK COVER is closed, redo HEATRUN for at least one hour by inputting FULL
         WHITE using TEST PATTERN of SERVICE MODE. Check the screen conditions and basic
         functions.

9-2. Symptoms of VIDEO or JACK PCB Trouble

  (1) Symptoms of POWER PCB Trouble
      Not even weak discharge (luminescence) shows on screen.
      Discharge (luminescence) on screen is unstable
      Set is producing unusual noise
      POWER SHUT DOWN occur (refer to Service Manual A. 9-3)

  (2) Symptoms of VIDEO or JACK PCB Trouble
      Only weak discharge (luminescence) shows on screen, but No Data is on screen
      Screen DATA is abnormal
      Particular input signal (Video, PC or Component etc.) does not operate

                                                  -35-
Trouble shooting


      No SOUND
      The Set does not operate normally. But, after turn off AC Power, if turn on again, it
                 operates normally again.
      Remote Control or KEY does not operate
      POWER SHUT DOWN occur (refer to Service Manual A. 9-3 )

  (3) Representative Symptoms caused by bad Connection between PCBs.
     [Note] Dust or extraneous materials is most likely to cause bad connection. Most of this case, it
            can be solved if using soft brush, AIR FRESHER, or breath to clean dust or extraneous
            materials or reassembling the Connector.

  * Refer to Chapter B for Symptoms of other parts with exception of VIDEO, JACK PCB and POWER
    PCB Trouble.

9-3. Trouble Diagnosis and Repairing Method for Representative Symptoms
   (1) When POWER SHUT DOWN occurs
      <1> Definition of "SHUT DOWN"
      - When LED color is green, you can't hear power operating sound. (Red : STAND BY, Green :
        Operating)
      - When turn on AC switch and then push "POWER" button of remote controller, power relay do
        not operate normally, and POWER operating sound can not be detected.
      <2> Trouble Repairing Procedure
      - As shown in Fig. 5, first check which of "LOW VOLTAGE" part or "HIGH VOLTAGE" part has
        a trouble.
      - If "LOW VOLTAGE" part is broken is checked, as shown in Fig. 6 diagnose the SET and then
        replace the broken PCB.
      - If "HIGH VOLTAGE" part is broken is checked, as shown in Fig. 7 diagnose the SET and then
        replace the broken PCB.
      -  When disconnecting/connecting connectors, you must turn "OFF" the AC power and
                   check the direction/position of them before working.
      -  If you turn the SET "ON" with POWER CONNECTORS of Z-SUS PCB and Y-SUS
                   PCB (P805A, P806A) disconnected, although you turn the SET "OFF" again,
                   Remaining Voltage still exists in the POWER PCB. Therefore assemble the connectors
                   several minutes after. Or, check the Remaining Voltage (Vsus, Vadd) by multimeter. If
                   Vsus is less 10V, connect connectors. Connecting connectors with the Remaining
                   Voltage (Vsus, Vadd) over 10V could generate sparks and be dangerous to Operators or
                   SET.

  (2) When weak Discharge exists on screen but "OSD" screen" can not be seen

     <1> Definition of this symptom
     - When the set was turned on, screen is BLACK but Weak Discharge (luminescence) exists.
     - When OSD does not show on screen and the set does not respond to remote controller or any
       button of KEY panel.

     <2> PCB CHECK PRIORITY
     - VIDEO PCB

                                                  -36-
                                                                             Trouble shooting


<3> Trouble Repairing Procedure
- If no problem in Connection(VIDEO PCB ==>CONTROLLER PCB), replace VIDEO PCB


                                         AC PWR "OFF"




                                       BACK COVER "OPEN"




                               POWER PCB's HIGH VOLTAGE
                                SWITCH "OFF" (refer to Fig.4)




                                         AC PWR "ON"




                              PWR "ON" with Remote Controller




                   YES                   "SHUT DOWN"                  NO
                                            occur?




  * LOW VOLTAGE part is N.G.                            * HIGH VOLTAGE part is N.G.
  * PCB check priority:                                 * PCB check priority:
    CTRL_LVDS => VIDEO => POWER                           Z-SUS => Y-SUS => SCAN
  * Trouble Diagnosis in order shown                      => DATA => POWER
    as Fig.6                                            * Trouble Diagnosis in order shown
                                                          as Fig.7




               Fig. 5 Trouble Diagnosis Flow when "SHUT DOWN" occurs




                                             -37-
Trouble shooting




                                         AC PWR "OFF"



                                   HIGH VOLTAGE SWITCH of
                                 POWER PCB "OFF" (refer to Fig.4)


                                     Disconnect PWR Connectors of
                                   Z-SUS and Y-SUS(P11, P8, P3, P4)


                                 AC PWR "ON" => PWR "ON" with
                                      Remote Controller




                    YES                   "SHUT DOWN"                     NO
                                             occur?




           AC PWR "OFF"                                                 AC PWR "OFF"



           Disconnect PWR                                       Reconnect only PWR Connector
          Controller PCB(P300)                                      of Y-SUS(P8, P3, P4)


     AC PWR "ON" => PWR "ON" with                              AC PWR "ON" => PWR "ON" with
          Remote Controller.                                        Remote Controller




            "SHUT DOWN"                                           



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