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                                        S/M No.TCP780FEF0



Service Manual
CHASSIS : CP-780
MODEL : DUB-2850GB
        DUB-2850
        DUB-2850K




   Caution
   : In this Manual, some parts can be changed for improving. their
     performance without notice in the parts list. So, if you need the
     latest parts information, please refer to PPL(Parts Price List)in
     Service Information Center.




                                                        NOV. 2005
CP-780 Service Manual

                                 CONTENTS


1 MAIN FEATURES                                                  3
   1.1 SPECIFICATIONS                                            3
   1.2 CHANNEL/FREQUENCY TABLE                                   5
2 SAFETY INSTRUCTION                                             7
3 ALIGNMENT INSTRUCTIONS                                         8
   3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE              8
   3.2 SERVICE MODE NAVIGATION                                   8
   3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS               8
   3.4 OPTION 1                                                  9
   3.5 OPTION 2                                                  9
   3.6 NVM default setting                                      10
   3.7 TV SET ALIGNMENT                                         12
   3.8 OAD(Over air download)                                   13
4 IC DESCRIPTION                                                14
   4.1 UOC III Series                                           14
   4.2 TDA8946J (STEREO AUDIO AMPLIFIER)                        24
   4.3 TDA8358J (VERTICAL AMPLIFIER)                            26
   4.4 TDA6108AJF (VIDEO AMPLIFIER)                             28
   4.5 2WC16-16KB (EEPROM)                                      29
   4.6 STR-W6754                                                30
   4.7 Pnx 8314                                                 32
   4.8 UDA 1334 BTS (audio DAC)                                 34
   4.9 CI MAX                                                   35
   4.10 M29W320ET(Flash Memory)                                 38
   4.11 K4S281632D(SDRAM)                                       39
5 CIRCUIT DESCRIPTION                                           40
   5.1 BLOCK DIAGRAM                                            40
   5.2 FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR                41
   5.3 GENERAL DESCRIPTION OF THE TV SOUND OF SOUND PROCESSOR   49
   5.4 FUNCTIONAL DESCRIPTION PROCESSOR                         51

6 SERVICE PARTS LIST                                            56
7 SCHEMATIC DIAGRAM                                             65
8 PRINTED CIRCUIT BOARD                                         70
9 EXPLODED VIEW                                                 78




                                      -2-
                                                                                   CP-780 Service Manual

DOCUMENT HISTORY

 VERSION       DATE                                COMMENTS
  V1.00       22/10/05      Creation of document (Author BD MIN) for project CP-780 50Hz iDTV.


1 MAIN FEATURES
1.1 SPECIFICATIONS
1.1.1 GENERAL

                                   Transmission                Picture compression           Voice compression
     DVB standard                    standard                        standard                     standard
                                     COFDM                            MPEG2                     MPEG Audio
     TV standard                   PAL - SECAM B/G D/K, PAL I/I, SECAM L/L'
     Colour system       Tuner     PAL, SECAM
                         AV        PAL, SECAM, PAL 60, NTSC M, NTSC 4.43
     Sound system                  NICAM B/G, I, D/K, L,
                                   FM 2Carrier B/G, D/K
     Power consumption             95W
     Sound Output Power            7W x 2 (at 60% mod, 10%THD)
     Speaker                       12W 8 ohm x2
     Teletext system               10 pages memory FASTEXT (FLOF or TOP)
     Aerial input                  75 ohm unbalanced
     Channel coverage              Off-air channels, S-cable channels and hyperband
     Tuning system                 frequency synthesiser tuning system
     Visual screen size            66cm
     Channel indication            On Screen Display
     Program Selection             100 programmes
     Aux. terminal                 EURO-SCART 1 : Audio / Video In and Out, R/G/B
                                                       In, Slow and Fast switching.
                                   EURO-SCART 2 : Audio / Video In and Out, SVHS In.
                                   SPDIF : jack on rear of cabinet(Digital channel output)
                                   AV3 : Audio-Video Jack on side of cabinet.
                                   SVHS3 (option) : Jack on side of cabinet sound
                                                      input common with AV3.
                                   Headphone jack on side of cabinet
     Remote Control                R-52N20
     PCMCIA                        CI slot (on rear of cabinet)


1.1.2 EURO-SCART 1 (21 Pin)
      Pin     Signal Description         Matching value
       1      Audio Output Right         0.5 Vrms, Impedance < 1 k , ( RF 54% Mod )
       2      Audio Input Right          0.5 Vrms, Impedance > 10 k
       3      Audio Output Left          0.5 Vrms, Impedance < 1 k , ( RF 54% Mod )
       4      Audio Earth
       5      Blue Earth
       6      Audio Input Left           0.5 Vrms, Impedance > 10 k
       7      Blue Input                 0.7 Vpp 0.1V, Impedance 75
       8      Slow Switching             TV : 0 to 2V, AV 16/9:4.5 to 7V, AV 4/3 : 9.5 to 12V, Impedance > 10 k

                                                         -3-
CP-780 Service Manual




 1.1.3 EURO-SCART 2 (21Pin)




                              -4-
                                                     CP-780 Service Manual

1.2 CHANNEL/FREQUENCY TABLE

 CHANNEL     EUROPE CCIR        FRANCE       GB(IRELAND)       EAST OIRT
   C01           46.25              -            45.75            49.75
   C02           48.25          55.75 (L )       53.75            59.25
   C03           55.25          60.5 (L )        61.75            77.25
   C04           62.25         63.75 (L )       175.25            85.25
   C05          175.25           176.00         183.25           93.25
   C06          182.25           184.00         191.25           175.25
   C07          189.25           192.00         199.25           183.25
   C08          196.25           200.00         207.25           191.25
   C09          203.25           208.00         215.25           199.25
   C10          210.25           216.00         223.25           207.25
   C11          217.25        189.25 (LUX)      231.25           215.25
   C12          224.25         69.25 (L )       239.25           223.25
   C13           53.75         76.25 (L )       247.25              -
   C14             -           83.25 (L )        49.75              -
   C15           82.25            90.25          57.75              -
   C16             -              97.25          65.75              -
   C17          183.75              -            77.75              -
   C18          192.25              -            85.75              -
   C19          201.25              -              -                -
   C20             -                -              -                -
   C21          471.25           471.25         471.25           471.25
   C22          479.25           479.25        4 79.25           479.25
   C23          487.25           487.25         487.25           487.25
   C24          495.25           495.25         495.25           495.25
   C25          503.25           503.25         503.25           503.25
   C26          511.25          511.25 5         11.25           511.25
   C27          519.25           519.25         519.25           519.25
   C28          527.25           527.25         527.25           527.25
   C29          535.25           535.25         535.25           535.25
   C30          543.25           543.25         543.25           543.25
   C31          551.25           551.25         551.25           551.25
   C32          559.25           559.25         559.25           559.25
   C33          567.25           567.25         567.25           567.25
   C34          575.25           575.25         575.25           575.25
   C35          583.25           583.25         583.25           583.25
   C36          591.25           591.25         591.25           591.25
   C37          599.25           599.25         599.25           599.25
   C38          607.25           607.25         607.25           607.25
   C39          615.25           615.25         615.25           615.25
   C40          623.25           623.25         623.25           623.25
   C41          631.25           631.25         631.25           631.25
   C42          639.25           639.25         639.25           639.25
   C43          647.25           647.25         647.25           647.25
   C44          655.25           655.25         655.25           655.25
   C45          663.25           663.25         663.25           663.25
   C46          671.25           671.25         671.25           671.25
   C47          679.25           679.25         679.25           679.25
   C48          687.25           687.25         687.25           687.25
   C49          695.25           695.25         695.25           695.25
   C50          703.25           703.25         703.25           703.25
   C51          711.25           711.25         711.25           711.25
   C52          719.25           719.25         719.25           719.25
   C53          727.25           727.25         727.25           727.25
   C54          735.25           735.25         735.25           735.25
   C55          743.25           743.25         743.25           743.25
   C56          751.25           751.25         751.25           751.25
   C57          759.25           759.25         759.25           759.25
   C58          767.25           767.25         767.25           767.25

                                       -5-
CP-780 Service Manual

 CHANNEL     EUROPE CCIR   FRANCE      GB(IRELAND)   EAST OIRT
   C59          775.25      775.25        775.25       775.25
   C60          783.25      783.25        783.25       783.25
   C61          791.25      791.25        791.25       791.25
   C62          799.25      799.25        799.25       799.25
   C63          807.25      807.25        807.25       807.25
   C64          815.25      815.25        815.25       815.25
   C65          823.25      823.25        823.25       823.25
   C66          831.25      831.25        831.25       831.25
   C67          839.25      839.25        839.25       839.25
   C68          847.25      847.25        847.25       847.25
   C69          855.25      855.25        855.25       855.25
   C70          863.25      863.25        863.25       863.25
   C71          69.25         -             -            -
   C72          76.25         -             -            -
   C73          83.25         -             -            -
   C74          90.25         -             -            -
   C75          97.25         -             -            -
   C76          59.25         -             -            -
   C77          93.25         -             -            -
   S01          105.25      104.75        103.25       105.25
   S02          112.25      116.75        111.25       112.25
   S03          119.25      128.75        119.25       119.25
   S04          126.25      140.75        127.25       126.25
   S05          133.25      152.75        135.25       133.25
   S06          140.25      164.75        143.25       140.25
   S07          147.25      176.75        151.25       147.25
   S08          154.25      188.75        159.25       154.25
   S09          161.25      200.75        167.25       161.25
   S10          168.25      212.75          -          168.25
   S11          231.25      224.75          -          231.25
   S12          238.25      236.75          -          238.25
   S13          245.25      248.75        255.25       245.25
   S14          252.25      260.75        263.25       252.25
   S15          259.25      272.75        271.25       259.25
   S16          266.25      284.75        279.25       266.25
  S17          273.25      296.75        287.25       273.25
  S18          280.25      136.00        295.25       280.25
  S19          287.25      160.00        303.25       287.25
  S20          294.25         -             -         294.25
  S21          303.25      303.25           -         303.25
  S22          311.25      311.25        311.25       311.25
  S23          319.25      319.25        319.25       319.25
  S24          327.25      327.25        327.25       327.25
  S25          335.25      335.25        335.25       335.25
  S26          343.25      343.25        343.25       343.25
  S27          351.25      351.25        351.25       351.25
  S28          359.25      359.25        359.25       359.25
  S29          367.25      367.25        367.25       367.25
  S30          375.25      375.25        375.25       375.25
  S31          383.25      383.25        383.25       383.25
  S32          391.25      391.25        391.25       391.25
  S33          399.25      399.25        399.25       399.25
  S34          407.25      407.25        407.25       407.25
  S35          415.25      415.25        415.25       415.25
  S36          423.25      423.25        423.25       423.25
  S37          431.25      431.25        431.25       431.25
  S38          439.25      439.25        439.25       439.25
  S39          447.25      447.25        447.25       447.25
  S40          455.25      455.25        455.25       455.25
  S41          463.25      463.25        463.25       463.25
                                 -6-
                                                                    CP-780 Service Manual

2 SAFETY INSTRUCTION

WARNING: Only competent service personnel may carry out work involving the testing or repair
of this equipment.

X-RAY RADIATION PRECAUTION

1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid
   such hazards, the high voltage must not exceed the specified limit. The nominal value of the
   high voltage of this receiver is 28-30 KV at max beam current. The high voltage must not,
   under any circumstances, exceed 33 KV. Each time a receiver requires servicing, the high
   voltage should be checked. It is important to use an accurate and reliable high voltage
   meter.

2. The only source of X-RAY Radiation in this TV receiver is the picture tube. For continued X-
   RAY RADIATION protection, the replacement tube must be exactly the same type tube as
   specified in the parts list.

SAFETY PRECAUTION

Potentials of high voltage are present when this receiver is operating. Operation of the receiver
outside the cabinet or with the back board removed involves a shock hazard from the receiver.
Servicing should not be attempted by anyone who is not thoroughly familiar with the
precautions necessary when working on high voltage equipment.
Discharge the high potential of the picture tube before handling the tube. The picture tube is
highly evacuated and if broken, glass fragments will be violently expelled.
If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement
Parts List.
When replacing a high wattage resistor (metal oxide film resistor) in the circuit board, keep the
resistor 10 mm away from circuit board.
Keep wires away from high voltage or high temperature components.
This receiver must operate under AC 220 - 240 volts, 50 Hz. NEVER connect to a DC supply or
any other voltage or frequency.

PRODUCT SAFETY NOTICE

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




                                               -7-
CP-780 Service Manual

3 ALIGNMENT INSTRUCTIONS
 3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE
   To switch the TV set into service mode please see instruction below.
    1 - Select PR. number 91
    2 - Adjust sharpness to minimum and exit all menus.
    3 - Within 2 seconds press the key sequence : RED - GREEN - menu
    The software version is displayed beside the word Service, e.g. "SERVICE V0.22".
    To exit SERVICE menu press menu key or Stand By key.
 3.2 SERVICE MODE NAVIGATION
 Pr Up/Down remote keys : cycle through the service items available.
 Vol -/+ remote keys    : Dec./Increment the values within range - Cycle trough option bits.
 OK key                 : Toggle bits in option byte

   Order                 Item                 Default setting
     1               HOR CEN                       39
     2               RED GAIN                      32
     3               GRN GAIN                      32
     4              BLUE GAIN                      32
     5               RED BIAS                      32
     6               GRN BIAS                      32
     7              AGC LEVEL                NO ADJUSTMENT
     8              G2-SCREEN                        -
     9                OPTION1                   0001 1001
    10                OPTION2                   0010 1111
    11                   AVL                         -
    12              PARABOLA                       20
    13              HOR WIDTH                      50
    14               CORNER T                      39
    15              CORNER B                       39
    16              HOR. PARAL                     25
    17                V.LINEAR                       -
    18                V.SLOPE                      36
    19              EW TRAPEZ                      25
    20              S CORRECT                      22
    21              VERT CENT                      43
    22               VERT SIZE                     24

3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS

There are two option bytes available (16 bits in all). These option bits are available from Service
mode. First find the OPTION1/OPTION2/OPTION3 control, and then use the Volume PLUS/MINUS
buttons on the remote control keypad to locate the bits, and OK key to toggle them. The table
below shows the two option bytes available;




                                                          -8-
                                                                             CP-780 Service Manual

3.4OPTION1
        B7      B6   B5                     B4           B3             B2        B1         B0
      TOP FASTEXT TUBE                                  Dolby      SVHS3
  1 Teletext (FLOF)                     VAI bit set     Virtual
                    4:3                  to 1 in                   disabled      TUNER OPTIONS
      OFF     OFF                                        OFF                        00=PHILIPS
                                        SECAM L
                                                                                    01=Not used
                                                                                      10=Alps
      TOP FASTEXT                       VAI bit set     Dolby                     11=Parstnic(DW)
     Teletext (FLOF) TUBE
 0                                       to 0 in                   SVHS3
                                                        Virtual
                      16:9              SECAM L                    enabled
       ON       ON                                       ON

3.5 OPTION2
        B7         B6         B5            B4            B3            B2         B1        B0
                           Nu Must                       5 keys                  PAT&
                                                          Iacal      Full                      n.u.
 1                         be Set to                                              TAT
                                                        keyboard    ATSS                   Must be set
     Fixed to   Fixed to     1 for                                              Enabled
                                       Fixed to `0'                                          to 1 for
        `0'        `0'      Future                       7 keys
                                                                    Basic        PAT&         future
                           compati                        Iacal
 0                                                                  ATSS          TAT      compatibility
                             bility                     keyboard                Disabled

 - OPTION SETTING BY MODEL
 CHASSIS           MODEL                OPTION                DW[hex]             REMARKS
                                       BIT[b7...b0]
  CP-780        DUB-2850GB             I 0001 1001                 19          OPTION "b1,b0" -
                                       II 0010 1111                2F          Depends on Tuner




                                                  -9-
CP-780 Service Manual


3.6 NVM default setting

The purpose of this message, when you change a virgin EEPROM, is to allow to modify the
NVM DATA to desired values.

1 - Introduction :
The NVM default values are fixed for the user, but for flexibility in service, these data are stored
in NVM and can be changed when the TV set is in a special mode call NVM EDITOR . This
mode can only be access from FACTORY mode.

2 - Entering into FACTORY mode.
To switch the TV set into FACTORY mode, use the factory remote control, and press on SVC
key. The factory menu will appear on the screen, showing FACTORY , plus other relevant
information like software version and date.
WARNING : When in FACTORY mode you should not press any key other than the keys
described in the procedure below. Unwanted key stroke could misadjust the TV set.

3 - Entering into NVM EDITOR mode.
To switch the TV set into NVM EDITOR mode, use the user remote control, and press on
 PICTURE/OK key. The NVM EDITOR window will appear on the screen. This mode allow
you to access all data stored in NVM. The current NVM address is given in column ADDR. in
both DECimal and HEXadecimal format. The column DATA gives the value contained at
selected address in both DECimal and HEXadecimal format.

4 - Navigation in NVM EDITOR mode.
Use Program Up/Down keys to select the desired address. Use Volume Up/Down keys to
change the data at selected address. You must press PICTURE/OK key to store value after
modification.

The data can be adjusted between 0 and 63.

5 - Exit NVM EDITOR mode.
To switch the TV set back into FACTORY mode, use the user remote control, and press on
 MENU key.
The factory menu will appear on the screen, showing FACTORY .

6 - Exit FACTORY mode.
To exit FACTORY mode, use the factory remote control, and press on SVC key.
The factory menu will disappear from the screen.




                                                -10-
                                                     CP-780 Service Manual


NVM DATA CHANGE LIST

                                            (hex)         CP-780
  No     Register Name        Address      Default      DUB-2850GB
   1     OCP_THRESHOLD         0x58F        0x91            <-
   2     DCXO                  0x590        0x4E            <-
   3     AGC_PHILIPS           0x5C1        0xAB            <-
   4     AGC_NC                0x5C2        0xAB           0x04
   5     AGC_ALPS              0x5C3        0xB6            <-
   6     AGC_PARTSNIC          0x5C4        0xB6            <-
   7     AGC_PHILIPS_START     0x5C5        0x16            <-
   8     AGC_NC_START          0x5C6        0x16           0x00
   9     AGC_ALPS_START        0x5C7        0x16            <-
  10     AGC_PARTSNIC_START    0x5C8        0x16            <-
  11     AVLLEV                0x621         0x5            <-
  12     Nor1_Bright           0x64A        0x23            <-
  13     Nor1_contrast         0x64B        0x2E            <-
  14     Nor1_Colour           0x64C        0x1C            <-
  15     Nor1_Sharpness        0x64D        0x23            <-
  16     Nor1_Tint             0x64E        0x20            <-
  17     Nor1_JVC_Bri          0x64F        0x2D            <-
  18     Nor1_JVC_Cont         0x650        0x2A            <-
  19     Nor1_JVC_Colour       0x651        0x1B            <-
  20     Nor1_JVC_Sharp        0x652        0x23            <-
  21     Nor2_Bright           0x653        0x28            <-
  22     Nor2_Contrast         0x654        0x13            <-
  23     Nor2_Colour           0x655        0x19            <-
  24     Nor2_Sharpness        0x656        0x1B            <-
  25     Nor2_Tint             0x657        0x20            <-
  26     PresetGainRGB         0x673        0x2A            <-
  27     PresetGainRGB         0x674        0x2A            <-
  28     PresetGainRGB         0x675        0x2A            <-
  29     Cathode_Drive         0x67B         0x1            <-
  30     Y_delay_PAL_BG        0x686         0x5            <-
  31     Y_delay_SECAM_BG      0x687         0x8            <-
  32     Y_delay_PAL_DK        0x688         0x5            <-
  33     Y_delay_SCM_DK        0x689         0x5            <-
  34     Y_delay_PAL_I         0x68A         0x7            <-
  35     Y_delay_SECAM         0x68B         0x5            <-
  36     Y_delay_SECAM-L       0x68C         0x8            <-
  37     Y_delay_AV            0x68D         0xA            <-
  38     G2_Bright             0x68E        0x1A            3D
  39     G2_Contrast           0x68F        0x42            77

                                    -11-
CP-780 Service Manual

3.7 TV SET ALIGNMENT

 3.7.1 G2 ALIGNMENT
 - Tune a colour bar pattern.
 - Find the G2 - SCREEN item in service mode.
 - Adjust screen volume ( on FBT ) to bring the cursor to central position : green.

  3.7.2 WHITE BALANCE
  - Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature.
  - Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature.

  3.7.3 FOCUS
  Adjust the Focus volume ( on FBT ) to have the best resolution on screen.

  3.7.4 VERTICAL GEOMETRY
  Adjust V. LINEAR (linearity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude), VERT CENT (vertical
  centring) to compensate for vertical distortion.




  3.7.5 HORIZONTAL PICTURE CENTRING
  Adjust HOR CEN (Horizontal centre) to have the picture in the centre of the screen.

  3.7.6 EAST / WEST CORRECTION
  Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, to compensate for geometrical
  distortion.




                                 HOR PARAL




                                                       -12-
                                                                          CP-780 Service Manual




                HOR WIDTH                                                    PARABOLA
          adjust for 93% overscan.




          CORNER B & CORNER T                                                 EW TRAPEZ


3.8 OAD (Over Air Download)
  3.8.1 Concept of OAD
       OAD is the function for updating software of IDTV(Integrated Digital TV) or DSTB (Digital Set-Top
       Box) from outer source.
  3.8.2 Object of OAD
       Sometimes IDTV or DSTB may need a newer software for technical or system problems after sale,
       so through OAD function, IDTV or DSTB may be updated automatically at each user's home.
  3.8.3 OAD on CP-780
       CP-780 performs OAD automatically when being on ST-BY mode. But CP-780 can't supply power
       to digital part to search s/w on ST-BY mode. To solve this, CP-780 is worked as below.
       a. power off by remote control on Analog mode : go directly to ST-BY mode. In this case, power
          consumption : 1.5w / AC 230V.
       b. power off by remote control on Digital mode
         - go to video mute (raster off) and stay about 3~5 minute to search S/W. In this case, power
           Consumption is 52W / AC 230V
         - After finishing searching s/w, TV set go to ST-BY mode. (1.5W / AC 230V) If turn off TV before
           TV complete searching s/w, TV set will perform it again.
         - If TV set find a new s/w to update, a update message will be shown on the screen when the
           user turn on TV.
         - CP-780 performs this process once a day.
         - If the user doesn't want OAD search, the user can press R/C button for 2~3 sec to go directly to
           ST-BY mode.
  3.8.4 Algorithm of OAD
       Digital stream has a date/time information. CP-780 stores a date info at NVM. UOC brings date
       info from digital stream and compares it with NVM data. If those two are different from each other,
       TV set performs OAD and store a date info at NVM.If those two are the same, go directly to ST-BY
       mode. Through this algorithm, CP-780 perform OAD search once a day.

                                                   -13-
CP-780 Service Manual

4 IC DESCRIPTION

4.1 UOC/// Series
   The UOC series combines the functions of a Video Signal Processor(VSP) together with a FLASH embedded
   TEXT/Control/Graphics m-Controller(TCG m-Controller) and US Closed Caption decoder. In addition the following
   functions can be added:

  - Adaptive digital(4H/2H) PAL/NTSC combfilter
  - Teletext decoder with 10page text memory
  - Multi- standard stereo decoder
  - BTSC stereo decoder
  - Digital sound processing circuit
  - Digital video processing circutt




4.1.1 IC MARKING AND VERSION

 Chassis        IC marking       OSD languages               ATSS countries              Text
 CP-780                          ENGLISH, WELSH              Australia,, Belgium,
                                 GEALIC                      Switzerland, Czech
                                                             Republic, Germany,
                                                             Denmark, Spain,             PAN-EUROPEAN
                                                             France, Finland, GB,        LATIN, CYRILLIC,
                                                             Greece, Hungary, Italy,     GREEK.
                                                             Ireland, Norway,
                                                             Netherlands, Portugal,
                                                             Poland, Sweden,
                                                             Slovak Republic,
                                                             Others




                                                     -14-
                             CP-780 Service Manual

4.1.2 BLOCK DIAGRAM




                      -15-
CP-780 Service Manual

4.1.3. PINNING

   QFP 128pin           Symbol                   Short Description
       1                VSSP2                    Ground
       2                VSSC4                    Ground
       3                VDDC4                    digital supply to SDACs (1.8V)
       4              VDDA3(3.3V)                supply (3.3 V)
       5            VREF_POS_LSL                 positive reference voltage SDAC (3.3 V)
       6          VREF_NEG_LSL+HPL               negative reference voltage SDAC (0 V)
       7          VREF_POS_LSR+HPR               positive reference voltage SDAC (3.3 V)
       8          VREF_NEG_HPL+HPR               negative reference voltage SDAC (0 V)
       9            VREF_POS_HPR                 positive reference voltage SDAC (3.3 V)
      10                XTALIN                   crystal oscillator input
       11              XTALOUT                   crystal oscillator output
      12                VSSA1                    Ground
      13             VGUARD/SWIO                 V-guard input / I/O switch (e.g. 4 mA current
                                                 sinking capability for direct drive of LEDs)
        14                DECDIG                 decoupling digital supply
        15                   VP1                 1st supply voltage TV-processor (+5 V)
        16                 PH2LF                 phase-2 filter
        17                 PH1LF                 phase-1 filter
        18                 GND1                  ground 1 for TV-processor
        19                SECPLL                 SECAM PLL decoupling
        20                DECBG                  bandgap decoupling
        21              EWD/AVL (1)              East-West drive output or AVL capacitor
        22                 VDRB                  vertical drive B output
        23                 VDRA                  vertical drive A output
        24                 VIFIN1                IF input 1
        25                 VIFIN2                IF input 2
        26                  VSC                  vertical sawtooth capacitor
        27                  IREF                 reference current input
        28                 GNDIF                 ground connection for IF amplifier
        29           SIFIN1/DVBIN1 (2)           SIF input 1 / DVB input 1
        30           SIFIN2/DVBIN2 (2)           SIF input 2 / DVB input 2
        31               AGCOUT                  tuner AGC output
        32                 EHTO                  EHT/overvoltage protection input
        33                                       Automatic Volume Levelling / switch
                                                 output / sound IF input / subcarrier
                 AVL/SWO/SSIF/ REFO/REFIN (2)    reference output / external reference
                                                 signal input for I signal mixer for DVB
                                                 operation
        34              AUDIOIN5L                audio-5 input (left signal)
        35              AUDIOIN5R                audio-5 input (right signal)
        36              AUDOUTSL                 audio output for SCART/CINCH (left
                                                 signal)
        37              AUDOUTSR                 audio output for SCART/CINCH (right
                                                 signal)
        38               DECSDEM                 decoupling sound demodulator

                                          -16-
                                                      CP-780 Service Manual

QFP 128pin         Symbol                Short Description
    39       QSSO/AMOUT/AUDEEM (2)       QSS intercarrier output / AM output /
                                         deemphasis (front-end audio out)
   40              GND2                  ground 2 for TV processor
   41              PLLIF                 IF-PLL loop filter
   42        SIFAGC/DVBAGC (2)           AGC sound IF / internal-external AGC for
                                         DVB applications
   43        DVBO/IFVO/FMRO (2)          Digital Video Broadcast output / IF video
                                         output / FM radio output
   44          DVBO/FMRO (2)             Digital Video Broadcast output / FM radio
                                         output
   45              VCC8V                 8 Volt supply for audio switches
   46             AGC2SIF                AGC capacitor second sound IF
   47               VP2                  2nd supply voltage TV processor (+5 V)
   48        IFVO/SVO/CVBSI (2)          IF video output / selected CVBS output /
                                         CVBS input
   49             AUDIOIN4L              audio-4 input (left signal)
   50            AUDIOIN4R               audio-4 input (right signal)
   51             CVBS4/Y4               CVBS4/Y4 input
   52                C4                  chroma-4 input
   53             AUDIOIN2L              audio 2 input (left signal)
   54            AUDIOIN2R               audio 2 input (right signal)
   55             CVBS2/Y2               CVBS2/Y2 input
   56             AUDIOIN3L              audio 3 input (left signal)
   57            AUDIOIN3R               audio 3 input (right signal)
   58             CVBS3/Y3               CVBS3/Y3 input
   59               C2/C3                chroma-2/3 input
   60            AUDOUTLSL               audio output for audio power amplifier
                                         (left signal)
   61            AUDOUTLSR               audio output for audio power amplifier
                                         (right signal)
   62            AUDOUTHPL               audio output for headphone channel (left
                                         signal)
   63            AUDOUTHPR               audio output for headphone channel (right
                                         signal)
   64            CVBSO/PIP               CVBS / PIP output
   65               SVM                  scan velocity modulation output
   66            FBISO/CSY               flyback input/sandcastle output or
                                         composite H/V timing output
   67                HOUT                horizontal output
   68              VSScomb               ground connection for comb filter
   69              VDDcomb               supply voltage for comb filter (5 V)
   70          VIN (R/PRIN2/CX)          V-input for YUV interface (2nd R input /
                                         PR input or CX input)
   71           UIN (B/PBIN2)            U-input for YUV interface (2nd B input /
                                         PB input)
   72        YIN (G/YIN2/CVBS-Yx)        Y-input for YUV interface (2nd G input / Y
                                         input or CVBS/YX input))

                                  -17-
CP-780 Service Manual


   QFP 128pin       Symbol               Short Description
      73             YSYNC               Y-input for sync separator
      74             YOUT                Y-output (for YUV interface)
      75          UOUT(INSSW2)           U-output for YUV interface (2nd RGB /
                                         YPBPR insertion input)
      76          VOUT(SWO1)             V-output for YUV interface (general
                                         purpose switch output)
      77            INSSW3               3rd RGB / YPBPR insertion input
      78            R/PRIN3              3rd R input / PR input
      79             G/YIN3              3rd G input / Y input
      80            B/PBIN3              3rd B input / PB input
      81             GND3                ground 3 for TV-processor
      82              VP3                3rd supply for TV processor
      83             BCLIN               beam current limiter input
      84             BLKIN               black current input
      85              RO                 Red output
      86              GO                 Green output
      87              BO                 Blue output
      88             VDDA1               analog supply for TCG m-Controller and
                                         digital supply for TV-processor (+3.3 V)
      89          VREFAD_NEG             negative reference voltage (0 V)
      90          VREFAD_POS             positive reference voltage (3.3 V)
      91             VREFAD              reference voltage for audio ADCs (3.3/2 V)
      92              GNDA               Ground
      93            VDDA(1.8)            analogue supply for audio ADCs (1.8 V)
      94           VDDA2(3.3)            supply voltage SDAC (3.3 V)
      95             VSSadc              ground for on-chip temperature sensor
      96           VDDadc(1.8)           supply voltage video ADC
      97            INT0/P0.5            external interrupt 0 or port 0.5 (4 mA current sinking
                                         capability for direct drive of LEDs)
      98            P1.0/INT1            port 1.0 or external interrupt 1
      99             P1.1/T0             port 1.1 or Counter/Timer 0 input
      100            VDDC2               digital supply to core (1.8 V)
      101            VSSC2               Ground
      102          P0.4/I2SWS            port 0.4 or I2S word select
      103         P0.3/I2SCLK            port 0.3 or I2S clock
      104         P0.2/I2SDO2            port 0.2 or I2S digital output 2
      105         P0.1/I2SDO1            port 0.1 or I2S digital output 1
      106         P0.0/I2SDI1/O          port 0.0 or I2S digital input 1 or I2S digital output
      107            P1.3/T1             port 1.3 or Counter/Timer 1 input
      108           P1.6/SCL             port 1.6 or I2C-bus clock line
      109           P1.7/SDA             port 1.7 or I2C-bus data line
      110          VDDP(3.3V)            supply to periphery and on-chip voltage regulator (3.3 V)
      111          P2.0/TPWM             port 2.0 or Tuning PWM output
      112          P2.1/PWM0             port 2.1 or PWM0 output
      113          P2.2/PWM1             port 2.2 or PWM1 output
      114          P2.3/PWM2             port 2.3 or PWM2 output


                                  -18-
                                                                        CP-780 Service Manual


    QFP 128pin              Symbol                     Short Description
       115                P3.0/ADC0                    port 3.0 or ADC0 input
       116                P3.1/ADC1                    port 3.1 or ADC1 input
       117                  VDDC1                      digital supply to core (+1.8 V)
       118                 DECV1V8                     decoupling 1.8 V supply
       119                P3.2/ADC2                    port 3.2 or ADC2 input
       120                P3.3/ADC3                    port 3.3 or ADC3 input
       121                  VSSC/P                     digital ground for m-Controller core and periphery
       122                P2.4/PWM3                    port 2.4 or PWM3 output
       123                P2.5/PWM4                    port 2.5 or PWM4 output
       124                  VDDC3                      digital supply to core (1.8V)
       125                  VSSC3                      Ground
       126                 P1.2/INT2                   port 1.2 or external interrupt 2
       127                  P1.4/RX                    port 1.4 or UART bus
       128                  P1.5/TX                    Port 1.5 or UART bus

 4.1.4 FEATURES

Analogue Video Processing (all versions)
  Multi-standard vision IF circuit with alignment-free PLL demodulator
  Internal (switchable) time-constant for the IF-AGC circuit
  Switchable group delay correction and sound trap (with switchable centre frequency) for the
  demodulated CVBS signal
  DVB/VSB IF circuit for preprocessing of digital TV signals.
  Video switch with 3 external CVBS inputs and a CVBS output. All CVBS inputs can be used
  as Y-input for Y/C signals. However, only 2 Y/C sources can be selected because the circuit
  has 2 chroma inputs. It is possible to add an additional CVBS(Y)/C input (CVBS/YX and CX)
  when the YUV interface and the RGB/YPRPB input are not needed.
  Automatic Y/C signal detector
  Adaptive digital (4H/2H) PAL/NTSC comb filter for optimum separation of the luminance and
  the chrominance signal.
  Integrated luminance delay line with adjustable delay time
  Picture improvement features with peaking (with switchable centre frequency, depeaking,
  variable positive/negative peak ratio, variable pre-/overshoot ratio and video dependent
  coring), dynamic skin tone control, gamma control and blue- and black stretching. All
  features are available for CVBS, Y/C and RGB/YPBPR signals.
  Switchable DC transfer ratio for the luminance signal
  Only one reference (24.576 MHz) crystal required for the TCG m-Controller, digital sound
  processor, Teletext and the colour decoder
  Multi-standard colour decoder with automatic search system and various forced mode
  possibilities
  Internal base-band delay line
  Indication of the Signal-to-Noise ratio of the incoming CVBS signal
  Linear RGB/YPBPR input with fast insertion.
  YUV interface. When this feature is not required some pins can be used as additional RGB/YPBPR
  input. It is also possible to use these pins for additional CVBS (or Y/C) input (CVBS/YX and CX).

                                               -19-
CP-780 Service Manual



  Tint control for external RGB/YPBPR signals
  Scan Velocity Modulation output. The SVM circuit is active for all the incoming CVBS, Y/C
  and RGB/YPBPR signals. The SVM function can also be used during the display of teletext
  pages.
  RGB control circuit with Continuous Cathode Calibration , white point and black level off-
  set adjustment so that the colour temperature of the dark and the light parts of the screen
  can be chosen independently.
  Contrast reduction possibility during mixed-mode of OSD and Text signals
  Adjustable wide blanking of the RGB outputs
  Horizontal synchronization with two control loops and alignment-free horizontal oscillator
  Vertical count-down circuit
  Vertical driver optimized for DC-coupled vertical output stages
  Horizontal and vertical geometry processing with horizontal parallelogram and bow
  correction and horizontal and vertical zoom
  Low-power start-up of the horizontal drive circuit
Analogue video processing (stereo versions)
  The low-pass filtered mixed down I signal is available via a single ended or balanced
  output stage.
Analogue video processing (mono versions)
  The low-pass filtered mixed down I signal is available via a single ended output stage
Digital Video Processing (some versions)
  Double Window mode applications. It is possible to display a video and a text window or 2
  text windows in parallel.
  Linear and non-linear horizontal scaling of the video signal to be displayed.
Sound Demodulation (all versions)
  Separate SIF (Sound IF) input for single reference QSS (Quasi Split Sound) demodulation.
  AM demodulator without extra reference circuit
  The mono intercarrier sound circuit has a selective FM-PLL demodulator which can be
  switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this
  system is such that the external band-pass filters can be omitted. In the stereo versions of
  UOCIII the use of this demodulator is optional for special applications. Normally the FM
  demodulators of the stereo demodulator/decoder part are used (see below).
  The FM-PLL demodulator can be set to centre frequencies of 4.72/5.74 MHz so that a
  second sound channel can be demodulated. In such an application it is necessary that an
  external bandpass filter is inserted.
  The vision IF and mono intercarrier sound circuit can be used for the demodulation of FM
  radio signals. With an external FM tuner also signals with an IF frequency of 10.7 MHz can
  be demodulated.
  Switch to select between 2nd SIF from QSS demodulation or external FM (SSIF)
Audio Interfaces and switching (stereo versions with Audio DSP)
  Audio switch circuit with 4 stereo inputs, a stereo output for SCART/CINCH, 1 stereo output
  for HEADPHONE. The headphone channel has an analogue volume control circuit for the L
  and R channel. Finally 1 stereo SPEAKER output with digital controls.
  AVL (Automatic Volume Levelling) circuit for the headphone channel.
  Digital input crossbar switch for all digital signal sources and destinations

                                             -20-
                                                              CP-780 Service Manual


  Digital output crossbar for exchange of channel processing functionality
  Digital audio input interface (stereo I2S input interface)
  Digital audio output interface (stereo I2S output interface)
Audio interfaces and switching (AV stereo versions without Audio DSP)
  Audio switch circuit with 4 stereo inputs, a stereo output for SCART/CINCH and a stereo
  SPEAKER output with analogue volume control.
  Analogue mono AVL circuit at left audio channel
Audio interfaces and switching (mono versions)
  Audio switch circuit with 4 external audio (mono) inputs and a volume controlled output
  AVL circuit
Stereo Demodulator and Decoder (full stereo versions)
  Demodulator and Decoder Easy Programming (DDEP)
  Auto standard detection (ASD)
  Static Standard Selection (SSS)
  DQPSK demodulation for different standards, simultaneously with 1-channel FM
  demodulation
  NICAM decoding (B/G, I, D/K and L standard)
  Two-carrier multistandard FM demodulation (B/G, D/K and M standard)
  Decoding for three analog multi-channel systems (A2, A2+ and A2*) and satellite sound
  Adaptive de-emphasis for satellite FM
  Optional AM demodulation for system L, simultaneously with NICAM
  Identification A2 systems (B/G, D/K and M standard) with different identification time
  constants
  FM pilot carrier present detector
  Monitor selection for FM/AM DC values and signals, with peak and quasi peak detection
  option
  BTSC MPX decoder
  SAP decoder
  dbx noise reduction (4)
  Japan (EIAJ) decoder
  FM radio decoder
  Soft-mute for DEMDEC outputs DEC, MONO and SAP
  FM overmodulation adaptation option to avoid clipping and distortion
Audio Multi Channel Decoder (stereo versions with Audio DSP)
  Dolby Pro Logic (DPL) (1)
  Five channel processing for Main Left and Right, Subwoofer, Centre and Surround. To
  exploit this feature an external DAC is required.
Volume and tone control for loudspeakers (stereo versions with Audio DSP)
  Automatic Volume Level (AVL) control
  Smooth volume control
  Master volume control
  Soft-mute
  Loudness
  Bass, Treble
  Dynamic Bass Boost (DBB) (2)

                                           -21-
CP-780 Service Manual


  Dynamic Virtual Bass (DVB) (3)
  BBE Sound processing (4)
  Graphic equalizer
  Processed or non processed subwoofer
  Programmable beeper
Reflection and delay for loudspeaker channels (stereo versions with Audio DSP)
  (Option) Dolby Pro Logic Delay (1).0
  Pseudo hall/matrix function
Psycho acoustic spatial algorithms, downmix and split in loudspeaker channels (stereo
versions with Audio DSP)
  Extended Pseudo Stereo (EPS) (5)
  Extended Spatial Stereo (ESS) (6)
  Virtual Dolby Surround (VDS 422,423) (1)
  SRS 3D and SRS TruSurround (4)
RDS/RBDS
  Demodulation of the European Radio Data system (RDS) or the USA Radio Broadcast Data
  System (RBDS) signal
  RDS and RBDS block detection
  Error detection and correction
  Fast block synchronisation
  Synchronisation control (flywheel)
  Mode control for RDS/RBDS processing
  Different RDS/RBDS block information output modes

m-Controller
  80C51 m-controller core standard instruction set and timing
  0.4883 ms machine cycle
  maximum of 256k x 8-bit flash programmable ROM
  maximum of 8k x 8-bit Auxiliary RAM
  12-level Interrupt controller for individual enable/disable with two level priority
  Two 16-bit Timer/Counter registers
  One 24-bit Timer (16-bit timer with 8-bit Pre-scaler)
  WatchDog timer
  Auxiliary RAM page pointer
  16-bit Data pointer
  Stand-by, Idle and Power Down modes
  24 general I/O
  14 bits PWM for Voltage Synthesis Tuning
  8-bit A/D converter with 4 multiplexed inputs
  5 PWM (6-bits) outputs for analogue control functions
  Remote Control Pre-processor (RCP)
  Universal Asynchronous Receiver Transmitter (UART)
Data Capture
  Text memory up to 10 pages
  Inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and

                                          -22-
                                                              CP-780 Service Manual


Subtitle Page Table (SPT)
  Data Capture for US Closed Caption
  Data Capture for 525/625 line WST, VPS (PDC system A) and Wide Screen Signalling
  (WSS) bit decoding
  Automatic selection between 525 WST/625 WST
  Automatic selection between 625 WST/VPS on line 16 of VBI
  Real-time capture and decoding for WST Teletext in Hardware, to enable optimized m-
  processor throughput
  Automatic detection of FASTEXT transmission
  Real-time packet 26 engine in Hardware for processing accented, G2 and G3 characters
  Signal quality detector for video and WST/VPS data types
  Comprehensive teletext language coverage
  Vertical Blanking Interval (VBI) data capture of WST data
Display
  Teletext and Enhanced OSD modes
  Features of level 1.5 WST and US Close Caption
  50Hz/60Hz display timing modes
  Two page operation for 16:9 screens
  Serial and Parallel Display Attributes
  Single/Double/Quadruple Width and Height for characters
  Smoothing capability of both Double Size, Double Width & Double Height characters
  Scrolling of display region
  Variable flash rate controlled by software
  Soft colours using CLUT with 4096 colour palette
  Globally selectable scan lines per row (9/10/13/16/) and character matrix [12x9, 12x10,
  12x13, 12x16, 16x18, (VxH)]
  Fringing (Shadow) selectable from N-S-E-W direction
  Fringe colour selectable
  Contrast reduction of defined area
  Cursor
  Special Graphics Characters with two planes, allowing four colours per character
  64 software redefinable On-Screen display characters
  4 WST Character sets (G0/G2) in single device (e.g. Latin, Cyrillic, Greek, Arabic)
  G1 Mosaic graphics, Limited G3 Line drawing characters
  WST Character sets and Closed Caption Character set in single device
  SVM for Text




                                           -23-
CP-780 Service Manual


4.2 TDA8946J STEREO AUDIO AMPLIFIER
 The TDA8946J is a dual-channel audio power amplifier with an output power of 2x15W at an 8
     load and a 18V supply. The circuit contains two Bridges Tied Load(BTL) amplifiers with an
 all-NPN output stage and standby/mute logic. The TDA8946J comes in a 17-pin DIL-bent-
 SIL(DBS) power package.

 4.2.1 FEATURES

* Few external components
* Fixed gain
* Standby and mute mode
* No on/off switching plops
* Low standby current
* High supply voltage ripple rejection
* Outputs short-circuit protected to ground, supply and across the load
* Thermally protected

Pin description

         Pin                Symbol              Description
          1                 OUT1-               negative loudspeaker terminal 1
          2                 GND1                ground channel 1
          3                  Vcc1               supply voltage channel 1
          4                 OUT1+               positive loudspeaker terminal 1
          5                   n.c.              not connected
          6                  IN1+               positive input1
          7                   n.c.              not connected
          8                  IN1-               negative input1
          9                  IN2-               negative input2
         10                 MODE                mode selection input
         11                  SVR                half supply voltage decoupling (ripple rejection)
         12                  IN2+               positive input2




                                              -24-
                         CP-780 Service Manual




Block diagram TDA8946J
         -25-
CP-780 Service Manual

4.3 TDA8358J VERTICAL AMPLIFIER

The TDA8358J are power circuit for use in 90 and 110 colour deflection systems for field
frequencies of 25 to 200Hz field frequencies, and for 4:3 and 16/9 picture tubes. The IC
contains a vertical deflection output circuit, operating as a high efficiency class G system. The
full bridge output circuit allows DC coupling of the deflection coil in combination with single
positive supply
voltages.

The east-west output stage is able to supply the sink current for a diode modulator circuit.

The IC is constructed in a Low Voltage DMOS(LVDMOS) process that combines bipolar, CMOS
and DMOS devices. DMOS transistors are used in the output stage because of the absence of
second breakdown.

  4.3.1 TDA8358J

Features :

* Few external components
* Highly efficient fully DC-coupled vertical bridge output circuit
* Vertical flyback switch with short rise and fal times
* Built-in guard circuit
* Thermal protection circuit
* Improved EMC performance due to differential inputs
* East-west output stage




                                                 -26-
                                                 CP-780 Service Manual

Pinning

          Pin   Symbol          Description
           1      INA           Positeve vertical input
           2      INB           Negative vertical input
           3       VP           Supply voltage
           4     OUTB           Vertical output voltage B
           5     INEW           East-west input voltage
           6     VGND           Vertical ground
           7    EWGND           East-west ground
           8    OUTEW           East-west output voltage
           9      VFB           Flyback supply voltage
          10     OUTA           Vertical output voltage A
          11    GUARD           Guard output voltage
          12    FEEDB           Input measuring resistor
          13     COMP           Input compensation current




                     Block diagram TDA8358J

                              -27-
CP-780 Service Manual


4.4 TDA6108AJF
   4.4.1 Features
-Typical bandwidth of 9.0MHz for an output signal of 60V (p-p)
-High slew rate of 1310V/us up and -1850V/us down
-No external components required
-Very simple application
-Single supply voltage of 200V
-Internal reference voltage of 2.5V
-Fixed gain of 81
-Black-Current Stabilization (BCS) circuit with voltage window from 1.5 to 6V
 and current window from 100Ua to -10Ma
-Thermal protection

4.4.2   Pin description


                                                                  Vi(1)    1
        Pin   Symbol      Description
        1     Vi(1)       inverting input1                         Vi(2)   2

        2     Vi(2)       inverting input2                         Vi(3)   3
        3     Vi(3)       inverting input3
        4     GND         ground(fin)                             GND      4

        5     lom         black current measurement output         Iom     5   TDA6108JF
        6     VDD         supply voltage
                                                                   VDD     6
        7     Voc(3)      Cathode output3
        8     Voc(2)      cathode output2                        Voc(3)    7
        9     Voc(1)      cathode output1
                                                                 Voc(2)    8

                                                                 Voc(1)    9




                                                                       Fig.2 Pin configuration




                                                  -28-
                                                                     CP-780 Service Manual



4.5   24WC16 - 16 KB EEPROM

Features :
* 16 Kbit serial I2C bus EEPROM
* 400KHz I2C Bus Compatible
* supply voltage : 1.8 V to 6.0 V
* Low Power CMOS Technology
* 1 Million Erase/Write cycles (minimum)
* 100 year data retention (minimum)

Pin description

       Pin No.               Name                      Description
       1, 2, 3             A0, A1, A2                  Device address - not used
          5                   SDA                      Serial Data/Address Input/Output
          6                   SCL                      Serial clock
          7                   WP                       Write control
          8                   Vcc                      Supply voltage
          4                   Vss                      Ground

The memory device is compatible with the I2C memory standard. This is a two wire serial
interface that uses a bi-directional data bus and serial clock. The memory carries a built-in 4-bit
unique device type identifier code (1010) in accordance with the I2C bus definition.

Serial Clock (SCL)
The SCL input is used to strobe all data in and out of the memory.
Serial Data (SDA)
The SDA pin is bi-directional, and is used to transfer data in or out of the memory.




                                               -29-
CP-780 Service Manual


4.6 STR - W6754
 4.6.1 GENERAL DESCRIPTION

The STR-W6754 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback
converter type switch mode power supply applications.

  4.6.2 FEATURES
* Small SIP fully isolated moulded 6 pins package
* Many protection functions :
* Pulse-by-pulse overcurrent protection (OCP)
* Overvoltage protection with latch mode (OVP)
* Overload protection with latch mode (OLP)

 4.6.3 BLOCK DIAGRAM




                                             -30-
                                                                    CP-780 Service Manual



 4.6.4     PIN DESCRIPTION

     Terminal No.                SYMBOL           DESCRIPTION
          1                         D             Drain terminal
          3                       S/GND           Source/ Ground terminal
          4                        VCC            Power supply terminal
          5                      SS/OLP           Delay at Overload/ Soft start set up terminal
          6                         FB            Feedback terminal
          7                      OCP/BD           Overcurrent Protection Input/ Bottom Detection
                                                  terminal


 4.6.5     CONTROL PART - ELECTRICAL CHARACTERISTICS


                                                                    RATING
    DESCRIPTION                  TERMINAL    SYMBOL          MIN.    TYPE    MAX     UNIT
Operation start voltage             4-3       VCC (on)       16.3     18.2   19.9     V
Operation stop voltage              4-3       VCC (off)      8.8      9.7    10.6     V
Circuit current in operation        4-3       ICC (on)         -        -      6      mA
Circ. current in non-operation      4-3       ICC (off)        -        -    100       A
Maximum on time                     1-3      TON (max)       27.5     32.5   39.0      s
Minimum on time                     1-3      TON (min)        0.4      0.8    1.2      s
O.C.P./B.D. terminal                7-3     VOCPBD(TH1)      0.28     0.40   0.52     V
threshold voltage 1
O.C.P./B.D. terminal               7-3      VOCPBD(TH2)      0.67    0.80    0.93        V
threshold voltage 2
O.C.P./F.B. terminal               7-3         IOCPBD        -250    -100     -40        A
outflow current
OVP operation voltage              4-3      VCC (OVP)        25.5    27.7    29.9        V
Latch circuit holding current      4-3        ICC (H)         -       45     140         A
Latch circuit release voltage      4-3      VCC (Loff)       6.0     7.2      8.5        V


4.6.6     MOSFET ELECTRICAL CHARACTERISTICS

                                                                  RATING
DESCRIPTION                      TERMINAL   SYMBOL           MIN. TYPE MAX           UNIT
Drain-to-source break               1-3       VDSS           650     -   -            V
down voltage
Drain leakage current              1-3         IDSS           -       -      300         A
On-resistance                      1-3       RDS (on)         -       -      0.96
Switching time                     1-3          tf            -       -      400      ns
                                                                                     o
Thermal resistance                  -           ch-F          -       -      1.6      C/W




                                                -31-
CP-780 Service Manual

4.7 pnx831x
 4.7.1 pin list by numbers

                #    NAME           #      NAME           #      NAME             #     NAME
                1    TMS            53     MIU_DATA[7]    105    MIU_ADDR[24]     157   AVDD_PLL
                2    TRST           54     MIU_DATA[14]   106    MIU_MASK[0]      158   XTAL_IN
                3    TCK            55     MIU_DATA[6]    107    MIU_MASK[1]      159   XTAL_OUT
                4    RESETN         56     MIU_DATA[13]   108    MIU_WEN          160   AVSS_PLL
                5    SYS_RESETN     57     MIU_DATA[5]    109    MIU_RDY          161   VDDP
                6    SCL0           58     MIU_DATA[12]   110    MIU_RDY          162   VSSP
                7    SDA0           59     MIU_DATA[4]    111    VDDP             163   B
                8    SCL1           60     VDDP           112    VSSP             164   AVDD_2
                9    SDA1           61     VSSP           113    SDRAM_DATA[0]    165   G/Y
                10 VDDP             62     MIU_DATA[11]   114    SDRAM_DATA[1]    166   IDUMP_2
                11 VSSP             6



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