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    and overviews
                                    6    Fault finding trees, diagrams and overviews                                                                         L9.1A               15

6   Fault finding trees, diagrams




                                                           START                                               Remark :
                                                                                                       In normal operation the
                                         Connect a pattern generator to the arial input.
                                                                                                        Red LED lights in half
                                     Set Patt.gen. to 475,25 MHz, colourbar, stereosound,
                                                                                                            intensity and in
                                                 PAL B/G (for France SECAM l).
                                                                                                       standby-mode the LED
                                                     Put the Mainsswitch : on.
                                                                                                         lights in full intensity
                                    In normal conditions the set will start with the Red LED
                                     blinking for one second in full intensity, one time then
                                      after a few seconds more in half intensity while the
                                                  picture and sound will appear.




                                                                                                                                                                                                                                                     1 1 1 1
                                                       Does the red LED                             Does the red LED                                                                                                                                                    Check/Replace
                                                                                                                                              Is the Power supply                         Any secondary
                                                    blink for one second in          No            light in full intensity          No                                      No                                 No         (A1);           No                 (A1); SW0231,F1500,D6505
                                                                                                                                                    hicking ?                            voltage present ?
                                                    full intensity, one time                           continuously                                                                                                        present?                  Note: If F1500 is defective, then also check R3503
                                                                 ?                                            ?
                                                                                                                                                                                                                              Yes
                                                               Yes                                                                                                                              Yes
                                                                                                                                                       Yes
                                                                                                                                                                                 1 7 1 3                                                                                       1 1 1 1
                                                                                                                                                                                               Check
                                                                                                                                         1 1 1 D                                                                          (A1);                   (A1);
                                                                                                                                                                                      (A7); ,                                                                         Check/Replace
                                                                                                                                                                                                3V3,                       startpuls       No          Voltage            No
                                                     Do picture and sound            No        A            Yes
                                                                                                                                          The load of the power supply
                                                                                                                                                    is too high.                          Check/Replace                    present?                    present?
                                                                                                                                                                                                                                                                               (A1); D6540,C2540,D6510,
                                                                                                                                                                                                                                                                                      R3510,R3529
                                                       appear properly
                                                               ?                                                                         Isolate each branch of the load                 TS7603,TS7604
                                                                                                                                           one by one, until the hicking                      IC7600                                                      Yes
                                                                                                                                                     disappear.                                X1660
                                                                                   Yes                                                                                                                                                             1 1 1 A
                                                                                                                                          Continue with the fault finding                  (A8);LED6690                       Yes
                                                                                                                                          for the branch, which causes                                                                              Check/Replace
                                                                                               Ensure communication
                                                                                                                                                   the overload.                                                                                     (A1); IC7520
                                                                                                      with the RC,                                                                1 1 1 1
                                                                                                                                                The branches are:                                                                                      R3525
                                                                                                    Check/Replace
                                                                                                                                                (A1); AudioSupply
                                                                                                      (A8);IC7680                                                                          Check/Replace                (A1); voltage on
                                                                                                                                                      +VBATT                                                   No
                                                                                                  Put the set into the                                                                   (A1); TS7518,L5552               TR5545 pin9
                                                                                                                                                    MainSupply
                                                                                                 Service Default Mode                                                                                                      present ?
                                                                                                                                                        Vaux
                                                                                               either via the DST or by
                                                                                               pressing the buttons on
                                                                                                                                                                                                                              Yes
                                                                                                the RC in the following
                                                                                               order :062596,                                                                                             1 1 1 A
                                                                                                or via the service pins
                                                                                                                                                                                                                          Check/Replace
                                                                                                    An error code is                                                                                                (A1); L5540,D6540,C2540
                                                                                               indicated by the blinking                                                                                            Vaux,F1572,L5573,D6560
                                                                                                   LED via the SDM.                                                                                                          IC7581
                                                                                                n-times blinking means                                                                                                                                          Note 1:
                                                                                                        error n.
                                                                                                See also chapter 5.5 for                                                                                                                                        IRIS SYMPTOM CODE
                                                                                                 detailled information

                                                                                                                                                                                                                                                                       1 1 1 A

                                                                                                                                                                                                                                                                   1       1 1      A
                                                                   Set is OK
                                                           Check / correct Options
                                                                                                    Is there an error
                                                              list via CSM see            No
                                                                                                       indication ?                                                                                                                                Condition        Main symptom            Extended symptom
                                                             chapter 5.5 of this
                                                             manual for details                                                                                                                                                                      code               code                      code

                                                                                                            Yes



                                                                                                            B                                                                                                                                                   Note 2:
                                                                                                                                                                                                                                                                          (A1) means Drawing A1
                                                                                                                                                                                                                                                                           means Test point P1



                                                                                                                                                                                                                                                                                         CL 86532104_034.eps
                                                                                                                                                                                                                                                                                                     190299
6    Fault finding trees, diagrams and overviews                                        L9.1A           16



           A
Ensure communication
       with the RC,
     Check/Replace                    No picture
       (A8);IC7680                 (Colour missing)                                     Picture OK
   Put the set into the                No Menu                                                                                                                          NO Picture                    Deflection not OK
                                                                                        Menu OK
  Service Default Mode               Black screen                                                                                                                       NO Sound                       Pictures are not
                                                                                        NO Sound
either via the DST or by              Sound OK                                                                                                                          Menu OK                     symetrical and unstable
                                                                                          (l,r,l+r)
pressing the buttons on
 the RC in the following                                    1 3 1 0
order :062596,                                           Check / Replace                                                                                     1 2 1 0
 or via the service pins                 (B);               (A2);L5480,Conn.0220       NICAM/2CS/                                               BTSC                 Check / Replace                          C
                                  Heater / Filaments   No   (B);Conn.0244,R3341,        Multimono                                             (TDA9851)               (A5);Antenna,
                            No
                                          OK                 R3342,CRT-Socket,         (MSP3415D)                                                                   VT_Supply,D6008,
     An error code is                      ?                      L5342,CRT                                                                                         (A6);X1205..X1208
indicated by the blinking
    LED via the SDM.                                                                                         1 5 1 0
 n-times blinking means                  Yes                                                                    Check / Replace
          error n.                                                                     (A5);,SIF                                           (A5);
                                                            1 3 1 0                                     No      (A5); IC7250-A,      No                                                         1 1 1 A
 See also chapter 5.5 for                                                                   Ok                                                    OK
                                                                                                                    TS7266
  detailled information                                          Adjust VG2                  ?                                                     ?                 Sound and Picture            Check / Replace
                                                               Check / Replace                                                                                                             No
                                       (B);VG2                                                                                                                      from external source              IC7250
                                                       No       (A2); TR5445,               Yes                                                   Yes                      OK ?
                                          OK
                                                              (B);R3343,C2343                                1 5 1 0
                                           ?
                                                                     CRT                                                                                                    Yes
                                                                                         (A10);
    Is there an error                                                                                           Check / Replace             (A9);,
                                                                                      ..      No                                                         1 2 1 0
        indication                                                                                               (A10); IC7833               , OK
                                         Yes                                               OK
             ?                                                                                                                                     ?                 Check / Replace
                                                            1 3 1 0                         ?
                                                                                                                                                              No
                                                                                                                                                                       Tuner1000
           Yes
                                                              Check/Replace                 Yes                       Yes
   If the mainsupply or            (A3);,      No      (A3);IC7401,
  EHT is missing, then                   OK                 D6401.C2403,D6402
                                          ?                                                                  1 5 1 0                      1 5 1 0
the error message may                                                                    (A12);
  not be reliable. So in                                                                                        Check / Replace             Check / Replace
                                                                                      ..
this state check/replace                                                                                No   (A11);TS7904..TS7910            (A9);IC7821
                                         Yes                                               OK
              the                                                                                             (A12);IC7050..IC7053              IC7822
                                                            1 3 1 0                         ?
    components of the
mainsupply and EHT in                                                                       Yes
     the first place see
                                   (A6);               Check/Replace       1 5 1 0
        schematics ;                                   No
                                                    (A6);IC7250-B/C         Check / Replace
       (A1), (A2) and
                                        OK                                           (A13);Conn.0234,
  (A4);IC7250-D 
                                                                                        Conn.0215
                                                                                         Speakers
                                         Yes
                                                            1 3 1 0
           B
                                                                Check/Replace
                                   (B);
                                                       No   (B);Conn0245,IC7330,
                                         OK
                                                                 CRT Socket


                                         Yes

                                 1 3 1 0

                                   Check/Replace
                                     (B);CRT
                                                                                                                                                                                                       CL 86532104_035.eps
                                                                                                                                                                                                                   190299
6    Fault finding trees, diagrams and overviews                          L9.1A             17




             C

     Horizontal section
      Picture unstable                                  Vertical section
        horizontally.                                 Vertical picture is
      Picture width too                               too small or unstable
            small.
          No sync.
         E/W not ok

                                                                                       1 3 5 0
                               1 3 5 0                  (A4);,            No     Check / Replace
                                                              OK                          (A4); IC7250
        (A4) ; ,             Check / Replace               ?
                      No
                                  (A4);IC7250
             OK
              ?                                                 Yes
                                                                                       1 7 1 8
             Yes                                                                         Check / Replace
                                                        (A3);,,                   (A3); IC7401 ,
                               1 3 5 0                       OK               No     R3401..R3403,
         (A2);,              Check / Replace               ?                             R3409
         ,,       No   (A2);TS7461,TS7460,                                        D6401,C2403
                                 TS7470,
            OK ?                                                Yes

             Yes
                                                     1 7 1 8
                                                        Check / Replace
    1 3 3 A                                           (A3);Vertical defl. coil
      Check / Replace                                        C0222
     (A2);L5457,C2458,
       C2457,L5463,
        L5465,L5470
           L5471                                                                         CL 86532104_036.eps
                                                                                                     190299
6    Fault finding trees, diagrams and overviews                                                       L9.1A          18



      B


                                                                                                                                          ERR 1,                                                     ERR 4
     ERR 8        No         ERR 2               No            ERR 7              No           ERR 5                No                                                 No                                                  No             ERR 10
                                                                                                or 6                                       3, 12                                                     and/or
                                                                                                                                                                                                       11
      Yes                      Yes                               Yes                             Yes                                                                                                                                         Yes
1 7 1 8            1 1 1 D                            1 7 1 8                          1 1 1 A                                                                                                        Yes
                                                                                                                                                                                                                                      1 7 1 X
                                                                                                                                                                                              +5 V Protection
uP Internal RAM        High beamcurrent ,               General I   2C   error.            BIMOS error.                  ERROR 1                       ERROR 3                                     Check                              EEPROM error
      error            E/W and Horizontal
                                                                                                                                                                                            (A2); +VLotAux+5V
                           Protection.                 Check SCL and SDA                The error is detected,
                                                                                                                 1 7 1 8                                                                                                                 - When I 2C
Check / replace                                          line of all units for           because there is no
                        - When the High                                                                                                                                                                                                 signals or the
 (A7); IC7600                                         shortcircuit to ground or        communications on I 2C                                   1 1 1 D
                    beamcurrent protection                                                                         X-Ray/Over-voltage                                                                                                 +5D are missing
                                                            to each other.                  of the BIMOS                                                                           ERROR 4                       ERROR 11
                   is started, fly-back lines                                                                          Protection.                 Vertical / Frame                                                                  on IC7601 the set
                                                                                              Message :                                              Protection.                                                                     can function, but
                   will be visible for 15 sec.                                                                      (USA version only)
                                                       The Error code can                  ERR 4 6 0 0 0
                   before the set is really in                                                                                                                                                                                       will not be able to
                                                          only be read by
                           protection.                                                                                - When the X-Ray         - Before the proctection     1 7 1 X                           1 2 1 0                  store any data.
                                                      putting the TV set into              CheckReplace
                         - When E/W or                                                                           protection is started, the        is really actived, a                                                                   Message :
                                                       the SDM mode. The                     (A4,A5) ; the
                    Horizontal protection is                                                                      set will hicc-up until the     horizontal line will be    Fault in audio section            I2C Tuner error         ERR 10 0 0 0 0
                                                      LED will blink 7 times.          +8VBIMOS and the I 2C
                   started, the set will hicc-                                                                       voltage at pin 50 of            visible for 3 sec.
                                                                                       lines pin7,8 of IC7250                                       - During Vertical /                                                                Check/Replace
                    up for 4sec. before the                                                                        IC7250 becomes >3.9                                       In this situation the set          - It is possible
                                                           Check / replace
                       protection is really                                                                       Volts. At the voltage of       Frame protection the       turns on without sound.            that during +5V           (A7); +5VD
                                                      (A5); Tuner1000 pin4,5
                            activated.                                                                              3.9 V the set is put in     EHT will not be able to             Message :                 protection Error 4       IC7601 pin 5,6
                                                       (A6); IC7250-C pin7,8
                        - During E/W or                                                                                protection mode.            turn on and so the             ERR 4 0 0 0 0                will be reported
                                                       (A7); IC7600 pin49,50
                     Horizontal protection                                                                       - During x-ray protection      VlotAux5V to the Tuner                                                  too
                                                         (A7); IC7601 pin5,6
                   the EHT will not be able                                                                      the EHT will not be able         and Sound IC is not            Check/Replace                     Message :
                                                        (A9); IC7821 pin1,24
                     to turn on and so the                                                                          to turn on and so the          available. As such         (A10); +VlotAux+5V,              ERR 11 0 0 0 0
                                                       (A10); IC7833 pin9,10
                    VlotAux5V to the Tuner                                                                        VlotAux5V to the Tuner        ERROR 4 and ERROR               IC7833 pin9,10.
                      and Sound IC is not                                                                            and Sound IC is not        11 will be reported too.                                       CheckReplace
                                                      Replace the item, which
                       available. As such                                                                             available. As such                 Message :                                            (A5); Tuner1000
                                                         causes the error.
                    ERROR 4 and ERROR                                                                             ERROR 4 and ERROR                   ERR 11 4 3 0 0
                    11 will be reported too.                                                                      11 will be reported too.
                           Message :                                                                                                                Check / replace
                         ERR 11 4 2 0 0                                                                                                              (A3);IC7401,
                                                                                                                                                     C2403,D6401
                          Check/Replace                                                                                                               Conn0222                                                                           ERROR 9
                          (CRT); R3340,
                          +200V supply
                                or                                                                                                                                                                                                 New micro controller or
                       E/W,Horizontal Prot.                                                                                                                                                                                        EEProm.Default values
                         (A2);Conn.0221                                                                                                                                                                                            were loaded. Re-align
                                                                                                                                        ERROR 12
                                                                                                                                                                                                                                   the set. If the problem
                                                                                                                                                                                                                                    persists, then IC7601
                                                                                                                                                                                                                                         is defective

                                                                                                                 Black current calibration loop instable    (protection)
                                                                                                                                                                                                                                        CL 86532104_037.eps
                                                                                                                                                                                                                                                    190299
6          Fault finding trees, diagrams and overviews                                                                                                                                    L9.1A           19


A1 POWER SUPPLY                                                                                                                                                                                                         A2 HORIZONTAL DEFLECTION                                                                     B CRT
                                              for 140V VBATT
                        5545                                                                                                                                                                                                                        5445
                                15 5550
                                                     6550        5577 +VBATT 5551                       MAIN SUPPLY                                                                                                     MAIN SUPPLY 3453   5451 3               EHT                                                   EHT
                                                                                                                                                                                                                                                                                                                                      ANODE CRT
                                16 5576                                                                                                                                                                                                                         FOCUS                                                 FOCUS
                                                                 2551                                                                                                                                                      2450                                                                                                       FOCUS
                                                                                                                                                                                                                                                                VG2                                                   VG2
                                              for 130V VBATT                                  ON A1 to                                                                                                                               ON A2 to                                                                                         VG2
                                                                                                  3543                                                                                                                                   3462
                                                                                                           discharge                                                                                                                                                    3485                               0220      0244              3340
                                                                                                  3546                                                                                                                                   3482                   6485             VIDEO SUPPLY                                 +200V
                                                                                                           circuit                                                                                                                                         5                                              2              2
                                                                                                  6542                                                                                                                                                                                                                                                   +200VA
                    POWER                                                                         3571                                                                                                                                                                                                                                          2340
                    TRAFO for 2x3 WATT / 5 WATT AUDIO                                                                                                                                                                                                                     2485                                                         3341
                                                                        6570                                                     A12 AUDIO AMPLIFIER
                                                          1573                                                                                                                                                                                                          5480
                                11 5575 5572                                                           AUDIO SUPPLY                                                                                                                                        7                              filement        4              4
                                                                                                                                                                                                                                                                                                                                                         to CRT
                                                                                                                                                           AUDIO SUPPLY
                                                                        6590                                                           VAUX                                                                                                                                                                                                              filement
                                                          2.5A                      2571                                                                   To 3950
                                                                                                                                                                                                                                                                                                                                       3342
                                for 2x2 WATT AUDIO
                                                          1573 6590                   6582                                        A2 HORIZONTAL DEFLECTION
                                11 5575 5572
                                                                                                                                                                                                                                                                                                                     A5 TUNER
                                                          2.5A              2571                                                       VAUX
                                                                                                                                                           To anode 6449                                                                                        6487    3488   VLOT AUX +50V 3442
                                                                                                                                                                                                                                                           11                                                                          VT_SUPPLY
            SPMS                                                                                                                                                                                                                                    LOT                                                                                                  to (9-1000)
                                for 2x1 WATT AUDIO                                                                                                                                                                                                                                                                                     6008              TUNER
                                                                                                                                                                                                                                                                                                     VT_SUPPLY
                                                                                                                                                                                                                                                                                                                                       -/C33
                                       1571    5572                  6580             6582                                        A7 CONTROL
                                10                                                                                                                                                                                                                                        2487
                                       T1A                                                                                       VAUX         3639
                                                                            2577                                                                                       7603
                                                                                                                                                                                   3V3                                                                                                                               A3 VERTICAL DEFLECTION
                                for 1x1 WATT AUDIO                                                                                   4654     3632              3633                                                                                                                                                                   VLOT AUX +50V
                                                                                                                                                                                                                                                                        3491                                                                             to 9401
                                       1571    5572                  6580             9509
                                10
                                                                                                                                                                          6601                    A8 FRONT CONTROL                                         6
                                                                                                                                                                                                                                                                6490                                 VLOT AUX -11V                     VLOT AUX -11V
                                       T1A                                  2577                                                                                          -/C3V9                                                                                                                                                                         to 4-7401
                                                                                                                                              VAUX-1            3657               +5D                                                                                              2489
                                                                                                                                                                                                          +5D
                                                                                                                                                                                                                                                                        3492
                                                                                                                                                                          6606
                                                                                                                                                                          -/C4V7
                                        6560              1572                                                                                                                                                                                                          3486
                                14 5573                                                                    VAUX
                                                                                                                                                                                                                                                                6486                                 VLOT AUX -11V
                                                          T1A 2561                                                                                                                                                                                         9                                                                           VLOT AUX +11V
                                                                                              ON A1 to
                                                                                                                                  A5 TUNER + VIDEO IF                                             A4 SYNCHRONISATION                                                                                                                                     to 2-7401
                                                                                                                                                                                                                                                                                    2486
                                                                                                  3585                                              7251                                                                                                                                           ON A2 to
                                                                                                                                 VAUX           3          2 +8V AUDIO +8V BIMOS                                                                                        3487
                                                                                                                                                                                                          +8V BIMOS                                                                               E/W Circuit
                                                                                                                                                                   5202                                                                                                                        and 7481,7482
                                                                                                                                                                                                                                                                                                                     A1 POWER SUPPLY
                                                                                                                                                       1
                                                                                                                                 STAND-BY                                                                                                                                                                                                                to DEGAUSSING
                                                                                                                                                  STB 7254                                        A6 VIDEO PROCESSING
                                                                                                                                                CIRCUIT 7256

                                                                                                                                                                                                          +8V BIMOS
                                                                                                                                                                       5821        +8VA
                                                                                                                                                                                                                                                                                                                     A9 BTSC DECODER
                                                                                                                                                                                                                                                                                                                             7823     5822
                                                                                                                                                                         2843                 A10 NICAM + 2CS DECODER                                                                                                                                    2-7821


                                                                                                                                                                                                          +8VA


                                                                                                                                                                                              A11 SMART SOUND                                                                                                        A5 TUNER + VIDEO IF
                                                                                                                                                                                                                                                                        3490       7480
                                                                                                                                                                                                                                                                6488                                 VLOT AUX +5V                     5000
                                                                                                                                                                                                                                                           8                   1          3                                                    +5V
                                                                                                                                                                                                                                                                                                                                                         to 6-1000
                                                                                                                                                                                                          +8VA                                                                                                                                           (TUNER)
                                                                                                                                                                                                                                                                                     2


IIC BUS INTERCONNECTION DIAGRAM                                                                                                                                                                   A9 BTSC DECODER
                                                                                                                                                                                                                                                                                                                     A10 NICAM + 2CS DECODER
                                                                                                                                                                                                          +8VA                                                                                                                        5831
A7 CONTROL                                    A5 TUNER +                           A6 VIDEO                       A9 BTSC                           A10 NICAM+                                                                                                                                                                                           +5VA
                                                                                                                                                                                                                                                                                                                                      5832
                 3651
                                                 VIDEO/IF                             PROC.                          DECODER                            2CS DEC.                                                                                                                                                                                         +5VB
            50                 SDA
                 3652
     7600 49                   SCL
    SAA5565                                                                                                                                                                                                                                                                                                          A14 REAR I/O CINCH
                   3655        3654           3001        3000                     3248         3247              3828        3827                   3842        3841
                                                                                                                                                                                                                                                                                                                                       VLOT AUX +5V
                                                                                                                                                                                                                                                                                                                                                         to 5101

                                                                                                                                                                                                                                                                                                                                                       CL 86532104_063.eps
      

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