Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo Plasma DP-42 chassis SP115 daewoo_dp42gm_dp42sm_dp42wm_chassis_sp115

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                         S/M No. : DSP115BEF0



Service Manual
42" PLASMA PDP MONITOR

CHASSIS : SP-115




DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr              Nov. 2002
                                     Contents
1.Safety Precaution                                                  5
2. Product Specification                                             6
   2-1. SPECIFICATION                                                6
   2-2. Available Input Signal                                       8
3. BLOCK DIAGRAM                                                    10
4. Description Of Each BLOCK                                        11
   4-1. A/V BLOCK                                                   11
      4-1-1. A/V BLOCK DIAGRAM                                      11
      4-1-2. VIDEO PCB                                              12
      4-1-3. JACK PCB                                               16
      4-1-4. KEY PCB                                                17
      4-1-5. LED PCB                                                17
   4-2. DRIVING BLOCK                                               18
      4-2-1. DRIVING BLOCK DIAGRAM                                  18
      4-2-2. DRIVING WAVEFORM                                       19
      4-2-3. DIGITAL PCB                                            21
      4-2-4. X-SUS PCB                                              25
      4-2-5. Y-SUS & SCAN PCB                                       27
      4-2-6. CONNECTION PCB & DATA COF                              29
 4-3. POWER BLOCK                                                   30
      4-3-1. POWER BLOCK DIAGRAM                                    30
      4-3-2. POWER PCB                                              31
5. SERVICE MODE                                                     33
   5-1. Entering SERVICE MODE                                       33
   5-2. Default Values For SERVICE MODE Items                       33
   5-3. Description Of SERVICE MODE Items                           34
6. Adjusting Method                                                 37
   6-1. Adjusting WHITE BALANCE                                     37
   6-2. Adjusting DRIVING VOLTAGE And WAVEFORM                      38
      6-2-1. Adjusting POWER PCB                                    38
      6-2-2. Adjusting X-SUS PCB                                    39
      6-2-3. Adjusting Y-SUS PCB                                    39
         FIG <6-1>. X-SUS PCB Adjusting Points                      41
         FIG <6-2>. Y-SUS PCB Adjusting Points                      42
7. SOFTWARE UPGRADE Method                                          43
8. SET Disassemble/Assemble Method                                  46
   8-1. Facts You Must Know When Disassembling/Assembling PDP SET   46
   8-2. PCB Disassemble/Assemble Method                             46
   8-3. FRONT MASK Disassemble/Assemble Method                      47
   8-4. FILTER GLASS Disassemble/Assemble Method                    47

                                            -2-
9. Main PCB Trouble Diagnosis                                                   49
   9-1. VIDEO & JACK PCB Trouble Diagnosis                                      49
   9-2. DIGITAL PCB Trouble Diagnosis                                           55
         FIG<9-1>. DIGITAL PCB LAYOUT                                           61
   9-3. X-SUS PCB Trouble Diagnosis                                             62
   9-4. Y-SUS & SCAN PCB Trouble Diagnosis                                      65
   9-5. CONNECTION PCB & DATA COF Trouble Diagnosis                             71
   9-6. POWER PCB Trouble Diagnosis                                             72
10. TROUBLE SHOOTING                                                            73
   10-1. Facts You Must Know When Diagnosing And Repairing                      73
   10-2. Representative Symptoms When Each PCB Breaks Down                      73
   10-3. Trouble Diagnosis And Repairing Method For Representative Symptoms     77
         FIG<10-1> Trouble Diagnosis Flow when SHUT DOWN occurs                 80
         FIG<10-2> Trouble Diagnosis Flow when Low Voltage SHUT DOWN occurs     81
         FIG<10-3> Trouble Diagnosis Flow when High Voltage SHUT DOWN occurs    82
         FIG<10-4> Trouble Diagnosis Flow when Abnormal Discharge occurs        83
11. ASSEMBLY LIST                                                               84
12. EXPLODED VIEW                                                               85
13. FIGURE COLLECTION                                                           86
         FIG<1>. TOTAL                                                          86
         FIG <2>. Y-SUS & SCAN                                                  87
         FIG <3>. X-SUS                                                         88
         FIG <4>. VIDEO & JACK                                                  89
         FIG <5>. POWER                                                         90
         FIG <6>. INLET                                                         91
         FIG <7>. LEFT-UP                                                       92
         FIG <8>. LEFT-DOWN                                                     93
         FIG <9>. RIGHT-UP                                                      94
         FIG <10>. RIGHT-DOWN                                                   95
         FIG <11>. WITHOUT JACK                                                 96
         FIG <12>. DIGITAL                                                      97
         FIG <13>. AC SWITCH ASSEMBLY                                           98
         FIG <14>. SCAN ASSEMBLY1                                               99
         FIG <15>. SCAN ASSEMBLY2                                              100
         FIG <16>. X-SUS ASSEMBLY                                              101
         FIG <17>. FRONT MASK ASSEMBLY                                         102
         FIG <18>. FRONT MASK INSIDE                                           103
         FIG <19>. BACK COVER                                                  104
         FIG <20>. POWER ADJUSTING POINTS                                      105
         FIG <21>. POWER HIGH VOLTAGE SWITCH                                   106
         FIG <22>. HOW TO ADJUST VOLTAGE                                       107

                                          -3-
      FIG <23>. Y-SUS & SCAN PCB DIODE TEST   108
      FIG <24>. SCANH PCB DIODE TEST          109
      FIG <25>. SCANL PCB DIODE TEST          110
      FIG <26>. 5 STEP GRAY SCALE PATTERN     111
14. Trouble Symptom Picture                   112
      Trouble Symptom Picture<1>.             112
      Trouble Symptom Picture <2>.            113
      Trouble Symptom Picture <3>.            114
      Trouble Symptom Picture <4>.            115
      Trouble Symptom Picture <5>.            116
      Trouble Symptom Picture <6>.            117
      Trouble Symptom Picture <7>.            118
      Trouble Symptom Picture <8>.            119
      Trouble Symptom Picture <9>.            120
      Trouble Symptom Picture <10>.           121
    Trouble Symptom Picture <11>.             122
    Trouble Symptom Picture <12>.             123




                                     -4-
1. Safety Precautions

(1) When moving or laying down a PDP Set, at least two people must be working. 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
   broken Set s condition, 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 (refer to FIG<10>). If this
   part is damaged, entire PDP PANEL must be replaced. Therefore, when working, be careful not to
   damage this part.


(6) A PDP Set contains 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. (Refer to FIG<10>, FIG<11>)


(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.




                                                    -5-
2. Product Specification

2-1. PRODUCT SPECIFICATION
   ITEM                    SPECIFICATION                                         REMARK
1. GENERAL
   1-1. MODEL NO           DSP-4280GM(G, W, S)
   1-2. CHASSIS NO         SP-115
   1-3. SCREEN SIZE        42 (16:9)
   1-4. COUNTRY            WORLD WIDE
   1-5. RESOLUTION         853(H) X 480(V)
   1-6. REMOCON TYPE       R-V28A (E)
   1-7. SAFETY STANDARD    UL, C-UL, CE, CB, FCC(CLASS B), CE(CLASS B), K-mark
2. MECHANICAL
   2-1. APPEARANCE
       1) WITHOUT STAND    WxHxD=1,039 x 628 x 80 mm
       2) WITH STAND       WxHxD=1,039 x 725 x 320 mm
       3) CARTON BOX       WxHxD=1,256 x 800 x 327 mm
   2-2. WEIGHT
       1) WITHOUT STAND    29.9 Kg
       2) WITH STAND       36.8 Kg
3. ELECTRICAL
   3-1. VIDEO INPUT        COMPOSITE(NTSC, PAL, SECAM, PAL-M/N, NTSC4.43)
                           & S-VHS(50/60Hz Y/C) 2 sets
  3-2. DTV/DVD INPUT       1080 i, 720P, 480P , 480i
                           (Y, Pb/Cb, Pr/Cr COMPONENT SIGNAL) 2 sets
  3-3. PC INPUT            VGA ~ UXGA (15 PIN D-SUB) 1 sets
  3-4. SOUND INPUT         2 sets for VIDEO, 2 sets for DTV/DVD, 1 set for PC
  3-4. SPEAKER OUTPUT      8W(R) + 8W(L)
  3-5. POWER REQUIREMENT   AC 100V~240V, 50/60Hz
  3-6. POWER CONSUMPTION   320W
  3-8. RS-232 CONTROL      RS-232 Communication (for SOFTWARE UPGRADE)
  3-9. FUNCTION
      1) SCALING           PC: H/V SIZE and POSITION Adjusting
                           VIDEO/DTV/DVD : NOMAL, 16:9, PANORAMA, ENLARGE
                           LB, ENLARGE LBS
     2) ZOOM               20 Scale ZOOMING & PANING
     3) OSD                Support 11 Languages
     4) OTHERS             STILL, SLEEP MODE, SOUND MODE




                                        -6-
Product Specification


  ITEM                           SPECIFICATION                                   REMARK
  4. OPTICAL
      4-1. SCREEN SIZE           42 (106Cm) DIAGONAL
      4-2. ASPECT RATIO          16:9
      4-3. NUMBER OF PIXELS      853(H)X480(V)
      4-4. DISPLAY COLOR         16.77 Million Colors ( 8BIT per each R,G,B)
      4-5. PIXEL PITCH           1.08(H)X1.08(V)
      4-6. PEAK LUMINANCE        300cd/ (WITH FILTER GLASS)
      4-7. CONTRAST RATIO        3000:1
      4-8. VIEWING ANGLE         Over 160 degree ( 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(R-V28)   POWER, INPUT SELECT, DISPLAY, ZOOM-,ZOOM+,
                                 MENU, UP, DOWN, VOLUME, FREEZE, SCREEN MODE,
                                 SOUND MODE, SLEEP


    5-3. ACCESSORIES             REMOCON CONTROLLER, BATTERY,
                                 INSTRUCTION MANUAL, A/V CABLE,
                                 STAND, WALL HANGER, SPEAKER R/L




                                              -7-
                                                   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

                                       -8-
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




                                    -9-
-10-
4. Description Of Each BLOCK

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




                                                                                                                         1




                                                                                                                                                                       1
                                                                                 6

                                                                                       5

                                                                                               4

                                                                                                       3

                                                                                                                2




                                                                                                                                             5

                                                                                                                                                   4

                                                                                                                                                          3

                                                                                                                                                                  2
                                                                                 GND

                                                                                       DATA2

                                                                                               DATA1

                                                                                                       COLUM3




                                                                                                                                                          P_LED



                                                                                                                                                                       GND
                                                                                                                COLUM2
                                                                                                                         COLUM1




                                                                                                                                                    GND
                                                                                                                                             S5V




                                                                                                                                                                  IR
                                                                                               P601                                                       P602
                              P603
                                          GND STB5V
                              2    1       G0   NC              DEN
                                           G1   NC
                                           G2   NC             S_RESET                                                                                                     VVS
                                           G3  DVS              V_MUTE
                                           G4  DHS
                                           G5  V_MUTE           DVS             IC600                                                          IC406                         VHS
                                           G6  S_RESET          DHS             PW171                                             VCLK       DPTV-MVS
                                           G7   NC
                                          GND  DEN
                                           B0  GND
                                           B1   R0                                                                       VPEN1
       to                                  B2   R1
                                                                                                                                                           VPEN
                                           B3   R2
    DIGITAL                                B4   R3
                                           B5   R4                       GBLKSLP GPEN                  GSOG
                                           B6   R5
                                           B7   R6                                                                                                 DECOE
                                                                      GHSFOUT
                              40   39     GND   R7                              GCOAST                 GREF
                                          DCLK GND
                                                 DCLKB
                                                                                                                                                IC401
                              PA5                                                                                                              SAA7118
                              5    STB5V

                              4    GND           GCLK
                                                                           IC500                                                                                  CCOMB
                              3
                                                                          CXA3516
    to PWR                    2    PWR_CLT
                                                              GHS
                                                                                                                                                                       YCOMB

                              1     LED_P
                                                   GVS

                              PA4                                                                                                                   IC400
                              10   STB5V                                                                                                           u64083
                                   LED_P
                              9

                              8    GND
                                                                                                                                       VIN
                              7     GND

                                    P5V
                                                                  G/Y_DTV




                              6
                                                                  Y_DVD
                                                                   R/PR
                                                                   GND
                                                                   VPC




                                                                   RPC
                                                                   HPC




                                                                   GND
                                                                  B/PB




                                    GND
                                                                   BPC

                                                                  GPC




                                                          ID_JACK GND
                                                                  GND



                                                                  GND

                                                                  GND

                                                                  GND

                                                                  GND

                                                                  GND
                                                                  GND




                                                                    CR




                              5
                                                          S_MUTE GND

                                                                  GND
                                                                   CB



                                                                   CO

                                                          MSP_RST YO




                              4        GND
    to PWR
                                                           DSCL
                                                           DSDA




                                    P12V
                                                                                                                                                                                                     to PWR
                                                           TXD1




                              3
                                                          SEL2
                                                          SEL3




                                                          RXD1
                                                          P12V
                                                          P12V


                                                          SEL1




                                                           GND
                                                           GND
                                                           GND
                                                           GND




                                                           GND
                                                          GND

                                                           SDA




                                                          GND
                                                          GND




                                                          GND
                                                          SCL




                                                           NC
                                                           NC




                              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
    KEY                                                                                                                                                                                    1     2    3      4   5   6
          PA601
    PCB                                                                                                                                                                                               PA602
                                                                                                                                                                                      LED


                                                                                  -11-
                                                        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, 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,
    output 3.3V DC LEVEL




                                         -12-
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 by DPTV-MVS)




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




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




                                               -13-
                                                         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 by CXA3516)




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




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




                                         -14-
Description Of Each BLOCK


     D. GFBK : SYNC for PLL




   (5) IC600(PW171)
      - Image processor IC

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




     B. DHS : HORIZONTAL SYNC (output by PW171)




                                       -15-
                                                             Description Of Each BLOCK


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




     D. DCLKB : CLOCK for DISPLAY (output by 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(7_INPUT 3_OUTPUT AUDIO/VIDEO SWITCH)
     - The IC perform AUDIO or VIDEO SWITCHING

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




                                             -16-
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




                                           -17-
                                                                        Description Of Each BLOCK


4-2 DRIVING BLOCK
   4-2-1. Driving BLOCK DIAGRAM



                                                           SCAN
                                                            TOP
        DATA
                                     Y-SUSTAIN
       INPUT      TIMING              ENERGY                                                 X-SUSTAIN
                 CNOTROL             RECOVERY                         PANEL                   ENERGY
                     &                 SCAN                                                  RECOVERY
                   DATA                ERASE
     CONTROL                                               SCAN                                SHELF
                INTERFACE             WRITING
      SIGNAL                                              BOTTOM




                            Verase               Vsus                  DATA
                                                                      DRIVER


                                                                                      Vadd




                      Vdr                                                                    Vsus
                                                        POWER
                                                                               Vadd




                                                    Vstb/Video/etc.




 Driving circuit block looks like above diagram. First, within the Digital-board, timing control / data
 interface signals input to Y / X / DATA-board. Also, low voltage and high voltage powers such as
 15V / 5V / Vsus / Yer / Vadd are supplied. SCAN is divided into two PCB(upper and lower) and
 DATA driver can drive 7 COF module. Also Connection-board which is located at the lower part of
 the panel, is divided into two PCB. It transfer 5V / Vadd power supply as well as various Y / X /
 DATA-board. Vadd power supply is transferred from Power module to X-board through Connection-
 board to Data driver.




                                                            -18-
Description Of Each BLOCK


4-2-2. Driving Waveform




  Y-DRIVING
                                                                  1 SUB-FIELD
           230V




           173V                                       BV   173V                    166V
     GND
                  -62V                          Yn


                                               SCAN                                       ERASING
 X-DRIVING

                                                                     173V
           158V                                163                                           155V
     GND


                         FULL WRITING       X-SHELF                         SUSTAINING

                                            ADDRESSING
                                        H
  Z-DRIVING
                                 68V             Zn
                                        L
     GND




  PDP Driving signal is largely divided into three(Y, X, Z) as shown above. They are outputs of Y-
  board, X-board, DATA-board (COF) respectively. Each Sub-field is divided into ADDRESSING,
  SUSTAINING, ERASING parts. FULL WRITE pulse from Y-board adds once per frame(~ 16ms).
                                                                                      =
  1) FULL WRITING
     It is a process that in order to display new image, every cell s condition must be uniformed to erase
     wall charge made by previous discharge and make new wall charge for next address discharge.
     Ramp shape signal is added to supply every cell uniform wall charge.
     To decrease Background luminescence and improve contrast, it is applied once per frame.
     Full Writing signal output by Y-board is Vsus electric potential supplied by power module plus
     ramp-shape output signal made by DC-DC Converter(TY1).


  2) ADDRESSING
     Previous to SUSTAINING, it is procedure to select charging cell for image display.
     In other words, it is the stage to make wanted cell to form wall charge.
     During this stage, SCAN block operate in Y-board and SHELF block (X_HIGH) in X-board.




                                                              -19-
                                                                Description Of Each BLOCK


3) SUSTAINING
   After the Addressing period, this stage is to add Sustaining pulse to selected cell to make the
   SUSTAINING discharge continue.
   For each X, Y-board sustain block, opposite-polarity rectangular pulse which have ER_H SUS_H
     ER_L SUS_L order, is distributed to Panel s X,Y electrode at a constant frequency.


4) ERASING
   Removing operation for Electrical discharge inside each cell to address new data in next Sub-field.
   It is a Ramp output signal similar to Full Writing signal.
   Ramp-down block operates in Y-board and Shelf block (X_N_SHELF) operates in X-board.




                                               -20-
Description Of Each BLOCK


4-2-3.    DIGITAL PCB



                                          ID1                                                                                                ID2
                                  1st_chip(A500K180)                                                                                 2nd_chip(A500K270)
                                                                                                                                                                         ID3 & ID4

         RGB DATA [0:3]   Inverse Gamma
                                                                   Weight                                                                                            SDRAM
                                 &                                                                                                     PISO
                                                                  Conversion                                                                                        (64M x 2)
                             Dithering



                                                                                                                                       SDRAM
                             APL                                                                                                      Controller
                           Detection
                                                 PDP Driving
                                               Timing Controller
                                                                                                                                                   Data Interface
                             ROM
                           Controller
                                                X Driver Control Signal

                                                                          Y Driver Control Signal

                                                                                                    Z Driver Control Signal




                                                                                                                                                                    Z Driver Data Signal
                             ROM                                                                                                          : Data Flow
                          (M27C1024)                                                                                                      : Control Address Flow
                                                                                                                                          : ROM Data Flow
                             ID33

                                              




  1. Digital PCB s Main Part
     (1)Actel FPGA A500K180-PQ208 : 1 EA
        - Location No. : ID1
        - Power : Internal 2.5V, I/O 3.3V
        - Package : PQFP 208
        - Typical Gates : 150,000
        - User I/O : 164
     (2)Actel FPGA A500K270-BG456 : 1 EA
        - Location No. : ID2
        - Power : Internal 2.5V, I/O 3.3V
        - Package : BGA 456
        - Typical Gates : 215,000
        - User I/O : 362
     (3)SDRAM( K4S643232E-TC70 86pin TSOP ) : 2 EA
        - Location No. : ID3~4
        - Power : 3.3V
        - Size : 64 M ( 512K * 32 bit * 4 Banks )




                                                                                                                              -21-
                                                         Description Of Each BLOCK


  (4)50MHz Clock Oscillator : 1 EA
     - Location No. : XD1
     - Power : 3.3V
  (5)Buffer IC( 74LCX541 ) : 17 EA
     - Location No. : ID9~25
     - Power : 5V
     - Input Voltage : 3.3V
     - Output Voltage : 5V
  (6)Buffer IC( 74LCX541 ) : 4 EA
     - Location No. : ID5~8
     - Power : 3.3V
     - Input/Output Voltage : 3.3V
  (7)EPROM( M27C1024-PLCC44 ) : 1 EA
     - Location No. : ID33
     - Power : 5V
     - Input Voltage : 3.3V
     - Output Voltage : 5V
  (8)2.5V Regulator( LP3964EMP-2.5 )
     - Location No. : ID32
     - Input Voltage : 5V
     - Output Voltage : 2.5V
  (9)EMI Reduction IC ( P2040 )
     - Location No. : ID34
     - Power : 3.3V



2. Data Flow
   (1)Input from Video PCB
      - 8bit Data per each R,G,B ( synchronized by DCLK)
      - DVS, DHS, DEN, S_RESET, V_MUTE, DCLK(33.5 MHz)
   (2)Inverse Gamma & Dithering Block
      - After mapping input data according to Reverse Gamma Correction Table , execute
         Dithering Process .
   (3)Weight Conversion Block
      - Map input data according to Weight Conversion Table , which is based on optimum PDP
        Driving Weight Pattern.




                                          -22-
Description Of Each BLOCK


   (4)ROM & ROM Controller Block
      - ROM contains Reverse Gamma Correction Table , Weight Conversion Table , APL
        Table and so on. Rom Controller Block generate Address & Control signal for receiving
        these data from ROM
   (5)PISO(Parallel Input Serial Output) Block
      - Load 10 pixels per each R,G,B data with parallel type and shift them with serial type in order
        of Weight ( LSB first ). These shifted data is stored in Internal Memory of A500K270(ID2)
        with based on DCLK(33.5MHz). After that, those data go into External Frame Memory
        (SDRAM) in order of Weight with based on CLK50M. In other words, PISO Block execute
        three steps Data Load      Data Shift & Internal Memory Write       Internal Memory Read &
        External SDRAM Write successively. To process with real time, there are three PISO
        Blocks.


   (6)SDRAM & SDRAM Control Block
      - Generate Address/Control signals for SDRAM. There are 2 SDRAMs (64M 32-bit SDRAM),
        which store 1 Frame s R,G,B data in order of Weight respectively to process with real time.
   (7)Data Interface Block
      - R,G,B data ouput from SDRAM is stored by line in Data Interface Block. These data is output
        in order matched by Data Driver IC(Z Driver IC) s input sequence. Our PDP has 853 Data
        Lines per each R,G,B, and need 853*3=2559 bit s storage. To process with real time,
        actually need 2559*2=5118 bit s storage.



 3. PDP Driving Timing Control
    (1)X-SUS Driving Control Signal Block
       - Generate Control Signals to drive X-SUS PCB. There are 6 Control Signals as follows.
       - X_SUSH, X_SUSL, X_ERH, X_ERL, X_HIGH, X_NSHELF
    (2)Y-SUS Drving Control Signal Block
       - Generate Control Signals to drive Y-SUS PCB & Scan Drvier IC. There are 12 Control Signals
         as follows.
       - Y_SUSH, Y_SUSL, Y_ERH, Y_ERL, Y_SC20_2, Y_SC20_3, Y_SC21_7, Y_SC21_9,
         Y_BLK, Y_CLK, Y_SI1, Y_SI2
    (3)Z Driving Control Signal Block
       - Generate Control Signals to drive DATA COF (Z Driver IC). There are 8 Control Signals as
         follows.
       - Z1_CLK1, Z1_CLK2, Z2_CLK1, Z2_CLK2, Z1_BLK, Z1_STB, Z2_BLK, Z2_STB




                                               -23-
                                                          Description Of Each BLOCK


(4)Sub Control Signal Block
   - Generate some Control Signals to control Data Interface Block and SDRAM Control
     Block . There are 5 Control Signals as follows.
   - F_SUBF, CLK_480, OUT_CLK, F_32SFT, SLCT
(5)APL Detection Block
   - Detect the amount of input Data, which is so-called APL (Average Picture Level), and give
     APL to Timing Controller Block in order to control Power Consumption of PDP Set.




                                          -24-
Description Of Each BLOCK


4-2-4.   X-SUS PCB


  1) X_SUSTAIN PCB block diagram


                           P201A                                                             P202A
                                                                                X    X_N_           X    X    X     X
         15V   GND Vadd GND GND GND GND   NC   Vsus Vsus   NC    Vadd GND GND _HIGH SHELF GND GND _ERL _ERH _SUSL _SUSH 5V


         11                                                1     12                                                    1




                             X_shelf                                                             X_sustain




           PU1                  PU2                   PU3              PU4                  PU5                  PU6




                                                  X_ELECTRODES

  2) Structure of X_SUSTAIN PCB
        X_SUSTAIN BLOCK SUS_H / SUS_L / ER_H / ER_L(Energy Recovery Circuit)
                              HIC Structured
        Vshelf Generating Circuit    From Vsus(173V) to X_HIGHT(163V) voltage generating circuit
           15V to X_ N_SHELF(5V) voltage generating circuit      Control Voltage by Variable Resistor
        RU1
        LOGIC Circuit that processes various waveform timing signal

                                                                -25-
                                                      Description Of Each BLOCK


3) Power Supply
   Vsus - Supplied by POWER MODULE. Supplies X-SUS as well as generates X-HIGHT
   voltage.(173V)
   15V - Supplied by POWER MODULE. Supplies FET driving power as well as generates
   X_N_SHELF voltage(5V).
   5V - Supplied through CONNECTION-board from DIGITAL-board. Used for LOGIC IC Power.


4) Signal
   X_SUSTAIN   SUS_H / SUS_L / ER_H / ER_L (Supplied from P202A)
   X_SHELF   X_N_SHELF / X_HIGHT (Supplied from P202A)


5) SUSTAIN BLOCK




                                                              LESONANCE COIL




                                                   LESONANCE FREQUENCY




                                        -26-
Description Of Each BLOCK


4-2-5.   Y-SUS & SCAN PCB


  1) Y_SUSTAIN PCB block diagram
                    P101A                                                P103A                                                        P102A
                              Y_    V    V                                                                                             Y_    Y_  Y_   Y_
         15V   GND GND   NC ERASE _SUS _SUS      GND GND                                                             5V     GND GND   ERL   ERH SUSL SUSH GND


          7                            1          11                                                                  1




                                                           Y_erase      Y_scan     Scan             Scan         IY8/IY27
                                                                                  (PY1,4)           (PY1)          _Vcc
                                                                 Remp         Scan          Scan            Remp
                                                                  _up        (PY1,4)                        _down
                                                                 &s/w                       (PY4)
                                                                                                             &s/w
                                                                                                             shelf




                                                       15V_Y2
                     15V_Y2
                                        Y                    DC-DC                                    Y
                                     _ramp_                  Y_ramp                                 _ramp                           Y_sustain
                                      down                    _up                                    _up
                                              5V_Y2




                   Ramp_down                                                Ramp_up
                                                                                                                                    Y_erase
                      S/W                                                     S/W

                         15V_Y2   5V_Y2




                                                             DC-DC
                                                                                               Y_shelf
                                                             Y_shelf
                                                                                   15V_Y3


                                                                                   15V_Y2                      5V_Y2


                                                               DC-DC
                                                                                               Y_scan
                                                               Y_scan


                                        5V_Y3                                                                               5V_Y3

                                   PY1                       PY2                                    PY3                         PY4




                                                                     SCAN-BOARD



                                                              Y_ELECTRODES


                                                                             -27-
                                                           Description Of Each BLOCK


2) Y_SUSTAIN PCB Structure
     SUSTAIN BLOCK         SUS_H / SUS_L / ER_H / ER_L (Energy Recovery Circuit)
     Structured with HIC
     RAMP_UP , RAMP_DOWN waveform generating circuit
     RAMP_UP_S/W , RAMP_DOWN_S/W
     Y_SCAN       -62V(based on GND) Applying Circuit
     Y_SHELF       70V(based on GND) Applying Circuit
     Yer 166V Applying Circuit
     RAMP_UP / Y_SCAN_VH / DC-DC converter circuit that generating Y_SCAN_GND s
     voltage
     LOGIC Circuit that processes various waveform timing signal


3) Power Supply
   Vsus - Supplied from POWER MODULE.(173V)
   15V - Supplied from POWER MODULE and used for FET s driving power and input powers of 3
          DC-DC converter. Also, generates output voltage of each Y-RAMP_UP / Y-SCAN /
          Y_SHELF(Y_SCAN_GND).
   5V - Supplied from POWER MODULE through DIGITAL-board. Used for LOGIC IC power
        supply. Also, power supply of 5V_Y2, 5V_Y3 is supplied through 7805 regulator from DC-
        DC converter Trans TY2 s output.
   Yer - Supplied by POWER MODULE. (166V)
   GND - Power supply GND / Y1 / Y2 / Y3


4) Signal
   Y_SUSTAIN     SUS_H / SUS_L / ER_H / ER_L(supplied by P102A)
   Y_ERASE (supplied by P103A)
   Y_SCAN (supplied by P103A)
   Y_RAMP_DOWN & S/W (supplied by P103A)
   Y_RAMP_UP & S/W (supplied by P103A)
   SCAN CLK / SI1 / SI2 / BLK (supplied by P103A)




                                            -28-
Description Of Each BLOCK


4-2-6. CONNECTION PCB & DATA COF


  1) Structure of CONNECTION PCB
       Divided into 2 PCBs (CONN-LEFT & CONN-RIGHT)
       CONN-LEFT        From DIGITAL PCB through connector P304, data signal and 5V IC Power
       are supplied. Vadd Power is supplied to PC 5~7 through PC08A.
       CONN-RIGHT          From DIGITAL PCB through connector P304A, data signal and 5V IC
       Power are supplied. 5V Power is supplied to X-board through P202. Also, Data signals are
       supplied from DIGITAL PCB through P302A and X-sustain/X-shelf signals are supplied from
       X-SUS PCB through P202. Vadd Power is supplied to PC 1~4 from X-SUS PCB through P202
       and to CONN-LEFT through PC8A1 and PC08A.


  2) Structure of DATA COF
       7 COF Type module(PC 1~7)
       DATA signals are transferred to CONNECTION PCB from DIGITAL PCB through P304A /
       P303A / P302A. And through PC 1~7 each are transferred to DATA COF.
       5V supplied from DIGITAL PCB through connector P304A / P303A. Vadd flows POWER PCB
          X-SUS PCB      connector P202 CONNECTION PCB DATA COF.




                                             -29-
                                                                   Description Of Each BLOCK


4-3. POWER BLOCK
  4-3-1. POWER BLOCK DIAGRAM




                                         Main B+
                                                                                  5V out
          Line             PFC                             Vlow
          Filter                                                                  12V out
                                    B+               15V
                                                                                  30V out

                                                   Sequence                       15V out
          ST- BY                                   Control
                                                                                  5V out
                   5V                              Block
                                                                                  3.3V out

                                         IC B+
                                                           Vadd
                                         Main B+                                 Vadd
                                         IC ON/OFF         Block

                                                                                 Discharge

                                                      IC ON/OFF

                                                                    Vsus
                                                      Main B+                            Vsus
                                                      IC B+

                          POWER

                          ON/OFF                                                  Vyer
                          Control                    Protectio n
                                                     Block
                                                                                  Vyer

                          ST- BY




   If Power is ON , V_PFC and V_LOW BLOCK is working and Voltage generated in V_LOW s
   2nd Coil actuates V_ADD. After V_ADD is ON , 2nd Voltage generated in V_ADD BLOCK
   acutates V_SUS BLOCK again.




                                               -30-
Description Of Each BLOCK


4-3-2. POWER PCB

          Rating : AC100~240 V, Single-Phase
          Regulation Method : Transistor & Switching Method
          Rating Input Frequency : 50~60Hz, Inrush Current : under 35A.
          Output Voltage is as follows.


                                                    Voltage(Vdc)                                                      Current(Adc)
                   Rating Variable                   Allowable                     Ripple     Ripple Noise               When
                                     Tolerance                        OVP                                    Rating                OCP
                           Range                     overshoot                     Voltage       Voltage                 Lode
                                        (V)                           (V)                                     (A)                  (A)
                    (V)     (V)                      Voltage(V)                   (mVp-p)       (mVp-p)                 change
     1     Vsus     175       10                         200           200          2000          500         1.5       0.1~1.5 Over 3.2
     2     Vadd      70       10                          90           100          500           300          1         0.1~1 Over 2.0
     3     Vyer     160       10                         180                         500          500         0.1       0~0.15
     4     Vdr1     15.5                  0.75            18              18          50          100          1         0.1~1     1.4
     5      V1        5                   0.25             6                         50           100          1         0.1~1
     6      V2       12                    0.6          13.6                         50           100         0.6         0~1
     7      V3       17                   0.75           18                          50           100         0.7         0~1
                    -17                   0.75           -18                         50           100         0.7        0.1~1
     8     V4        5.1                  0.55           6.5                          50          100          1         0.1~1
     9     V5        3.6                  0.33          3.66                         33            66          1          0~1
    10     Vstb       5                    0.5            6                          50           100         0.5         0~1
        * When Protect Circuit operates, all Outputs except Vstb are suspended. But, when
          Vstb is abnormal, all Outputs are suspended.
        * OVP(Over Voltage Protection), OCP(Over Current Protection)

        The above table s Output Voltage output from the following connector.
        (based on the Parts Side s silk name of POWER PCB)
  Vsus    Vsus    Vyer   NC    HG    HG      Vdr1         NC       Vsus    Vsus     NC   HG     HG      HG   HG     Vadd    HG   Vdr1



                         P2                                                                        P1
   NC                                                          LG

   NC                                                          LG

   VG                         Vstd                             V2

   VG                          VG                              V2
                                                                                                 V3
   V4                          NC                              NC
                  P4                         P5                                P3                SG          P6
   VG                          NC                              LG
                                                                                                 SG
   VG                          PR                              LG
                                                                                                 V3
   V5                                                          V1

   NC                                                          V1

   NC


                                                                    -31-
                                                Description Of Each BLOCK


* P2 is connected to Y-SUS PCB s P101A
 P1 is connected to X-SUS PCB s P201A
 P4 is connected to VIDEO PCB s PA4
 P5 is connected to VIDEO PCB s PA5
 P3 is connected to DIGITAL PCB s P301A
 P6 is connected to JACK PCB s PA6.




                                         -32-
5. SERVICE MODE

 5-1. Entering SERVICE MODE


   Push Remote controller's "UP"    MUTE          DISPLAY   MUTE   BUTTON to enter
   SERVICE adjust MODE.


 5-2. Default Values fot SERVICE MODE


   1) PW171
      -SUB-BRIGHTNESS : 28
      -SUB-CONTRAST : 40
      -R-BIAS : 68
      -G-BIAS : 65
      -B-BIAS : 70
      -R-GAIN : 67
      -G-GAIN : 45
      -B-GAIN : 78


   2) SAA7118
      -SUB BRT : 128
      -SUB CONT : 50
      -SUB CLR : 64
      -SUB TNT : 0
      -SUB SRP : 10


   3) DPTV
      -SUB BRT : 59
      -SUB CONT : 13


   4) CXA3516
      -SUB CONT : 58
      -Cb OFFSET : 39
      -Cr OFFSET : 37
      -HYS      :3
      -THRSLD : 14




                                           -33-
                                                                               SERVICE MODE


  5) MSP34X0
    -PRESCALE : 22
5-3. Description of SERVICE MODE Items


1) PW171
  (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 set up can be done using the
          recorded values.
  (1)SUB BRT : Set up BRIGHT standard value of PW171.
  (2) SUB CONT : Set up CONTRST standard value of PW171.
  (3) BIAS R : Set up RED BIAS value during WHITE BALANCE
  (4) BIAS G : Set up GREEN BIAS value during WHITE BALANCE
  (5) BIAS B : Set up BLUE BIAS value during WHITE BALANCE
  (6) GAIN R :Set up RED GAIN value during WHITE BALANCE
  (7) GAIN G : Set up GREEN GAIN value during WHITE BALANCE
  (8) GAIN B : Set up BLUE GAIN value during WHITE BALANCE


2) SAA7118
  (Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not change
          initial values.
  (1) SUB BRT : Set up BRIGHT standard value of SAA7118.
  (2) SUB CONT : Set up CONTRAST standard value of SAA7118.
  (3) SUB CLR : Set up COLOR standard value of SAA7118.
  (4) SUB TNT : Set up TINT standard value of SAA7118.
  (5) SUB SRP : Set up SHARPNESS standard value of SAA7118.


3) DPTV
  (Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
          change initial values.
  (1) SUB BRT : Set up BRIGHT standard value of DPTV MVS.
  (2) SUB CONT : Set up CONTRAST standard value of DPTV MVS.




                                              -34-
SERVICE MODE


 4) CXA3516
   (Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
            change initial values.
   (1) SUB CONT : Set up CONTRAST standard value of CXA 3516
   (2) Cb OFFSET : Set up BLACK LEVEL of Cb CHANNEL
   (3) Cr OFFSET : Set up BLACK LEVEL of Cr CHANNEL
   (4) HYS : Set up HYSTERISIS of SYNC
   (5) THR SLP : Set up THRESHOLE of PEDESTAL LEVEL


 5) MSP34X0
   (Note) This article is not for adjustment after replacement of VIDEO PCB. Therefore do not
            change initial values.
   (1) PRESCLE : Set up AUDIO output signal' s magnitude


 6) MISC
   (1) TST PTRN AT : Changing TEST PATTERN (RED                 GREEN    BLUE     BLACK       WHITE )
                         every minute automatically.
   (2) TST PTRN MA : Changing RED           GREEN        BLUE    BLACK      WHITE TEST PATTERN
                          manually using 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
                   Remocon' s POWER on turns the set on from STAND BY state.
   (4) JACK : Set up depending on JACK BOARD' s input MODE
     - MULTI : Used by DSP-4280 series
     - MONITOR : Used by DSP-4282 series
     - MONITOR+ : Used by DSP-4282 series with DSP-JU20 attached.
   (Note) Wront setup causes displaying problem. So you must be careful when SETTING.
   (5) PXL SFT
     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 PDP's characteristic phenomenon, 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

                                                  -35-
                                                                     SERVICE MODE


  (1) VER : Displaying Software's VERSION


8) RESET
  (1) EDID
  (2) LEVEL 1 : RESET SERVICE MODE Condition's All Values.
  (3) LEVEL 2 : RESET SERVICE MODE Condition's All Values except PW171 values
  (4) FACTORY : RESET to factory shipping initialiaztion.




                                            -36-
6.Adjusting Method

6-1. Adjusting WHITE BALANCE


  (1) Input 5 STEP GRAY SCALE PATTERN to Video Input Terminal. (refer to FIG<26>)


  (2) Set the SCREEN MODE to NORMAL .


  (3) Enter SERVICE MODE by inpu



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