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                                        S/M No.TCP850FEF0



Service Manual
CHASSIS : CP-850/F
MODEL : DTK-28
        DTK-29




   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.




                                                         JUN.2006
                                                      CP-850/F Service Manual

                                  CONTENTS


1 MAIN FEATURES                                                          5
   1.1 SPECIFICATIONS                                                    5
       1.1.1 GENERAL                                                     5
   1.2 CHANNEL/FREQUENCY TABLE                                           6
   1.3 ATSS SORTING METHOD                                               9
       1.3.1 GENERAL CASE                                                9
2 SAFETY INSTRUCTION                                                    11
3 ALIGNMENT INSTRUCTIONS                                                12
   3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE                     12
   3.2 SERVICE MODE NAVIGATION                                          12
   3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS                      12
       3.3.1 OPTION 1                                                   13
       3.3.2 OPTION 2                                                   13
       3.4 TV SET ALIGNMENT                                             13
       3.4.1 LOCAL OSCILLATOR ALIGNMENT                                 13
       3.4.2 G2 ALIGNMENT                                               13
       3.4.3 WHITE BALANCE                                              14
       3.4.4 FOCUS                                                      14
       3.4.5 VERTICAL GEOMETRY                                          14
       3.4.6 HORIZONTAL PICTURE CENTRING                                14
       3.4.7 EAST / WEST CORRECTION                                     14
       3.4.8 AGC                                                        15
4 IC DESCRIPTION                                                        16
   4.1 TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER                  16
       4.1.1 BLOCK DIAGRAM OF THE SDA55XX                               16
       4.1.2 DESCRIPTION                                                16
       4.1.3 IC MARKING AND VERSION                                     17
       4.1.4 PINNING                                                    17
   4.2 VSP9405 - SCAN RATE CONVERTER INCLUDING MULTISTANDARD COLOUR
       DECODER                                                          18
       4.2.1 BLOCK DIAGRAM OF THE VSP9405                               19
       4.2.2 DESCRIPTION                                                19
       4.2.3 PINNING                                                    21
   4.3 DDP 3315C - DISPLAY AND DEFLECTION PROCESSOR                     26
       4.3.1 BLOCK DIAGRAM OF THE DDP 3315C                             26
       4.3.2 DESCRIPTION                                                27
       4.3.3 PINNING                                                    29
4.4 MSP341X MULTISTANDARD SOUND PROCESSOR                               31
4.4.1 BASIC FEATURES OF THE MSP 341X                                    31
4.4.1.1 Demodulator & NICAM Decoder Section                             31


                                       -1-
CP-850/F Service Manual

      4.4.1.2 DSP-Section (Audio Baseband Processing)                       32
      4.4.1.3 Analogue Section                                              32
      4.4.1.4 NICAM & FM/AM-Mono                                            32
      4.4.1.5 German 2-Carrier System (DUAL FM System)                      32
  4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR   35
      4.5.1 DESCRIPTION                                                     35
      4.5.2 FEATURES                                                        35
      4.5.3 PINNING                                                         35
      4.5.4 BLOCK DIAGRAM                                                   36
  4.6 TDA894XJ STEREO AUDIO AMPLIFIER                                       37
      4.6.1 FEATURES                                                        37
  4.7 TDA835XJ VERTICAL AMPLIFIER                                           38
      4.7.1 TDA8353J                                                        38
  4.8 TDA6108JF                                                             40
  4.9 24C16 - 16 KB EEPROM                                                  41
  4.10 STR - W6754                                                          42
      4.10.1 GENERAL DESCRIPTION                                            42
      4.10.2 FEATURES                                                       42
      4.10.3 BLOCK DIAGRAM                                                  42
      4.10.4 ELECTRICAL CHARACTERISTICS                                     43
5 CP-850/F CHASSIS DESCRIPTION                                              45
  5.1 BLOCK DIAGRAM                                                         45
  5.2 IF SECTION                                                            46
      5.2.1 BLOCK DIAGRAM                                                   46
      5.2.2 VISION IF AMPLIFIER                                             47
      5.2.3 TUNER-AND VIF-AGC                                               47
      5.2.4 FPLL, VCO AND AFC                                               47
      5.2.5 VIDEO DEMODULATION AND AMPLIFIER                                48
      5.2.6 SOUND IF AMPLIFIER AND SIF-AGC                                  48
      5.2.7 QUASI-PARALLEL-SOUND (QPS) MIXER                                48
      5.2.8 STANDARD SWITCH                                                 48
      5.2.9 L SWITCH                                                        48
      5.2.10 INTERNAL VOLTAGE STABILISER                                    48
  5.3 VIDEO / RGB
      5.3.1 FRONT END                                                       48
      5.3.1.1 CVBS Front-End                                                48
      5.3.1.2 Input Selector                                                49
      5.3.1.3 Signal Levels And Gain Control                                49
      5.3.1.4 Synchronization                                               49
      5.3.1.5 Chroma Decoder                                                49
      5.3.1.6 Luminance Processing                                          49




                                       -2-
                                                        CP-850/F Service Manual

5.3.1.7 RGB Front-End                                                     49
      5.3.1.8 Signal Processing                                           49
      5.3.1.8.1 Horizontal Prescaler                                      49
      5.3.1.8.2 Noise Reduction                                           50
      5.3.1.8.3 Noise Measurement                                         50
      5.3.1.8.4 Operation Modes                                           50
      5.3.1.8.5 Digital 656 Output                                        50
  5.3.2 BACK END                                                          50
      5.3.2.1 Digital Input Interface                                     50
      5.3.2.2 Horizontal Scaler                                           50
      5.3.2.3 Luma Contrast and Brightness                                50
      5.3.2.4 Black Level Expander/Compressor (BLEC)                      50
      5.3.2.5 Luma Sharpness Enhancer (LSE)                               51
      5.3.2.6 Dynamic Peaking                                             51
      5.3.2.7 Luma Transient Improvement (LTI)                            51
      5.3.2.8 Mixing of Dynamic Peaking and LTI                           51
      5.3.2.9 Chroma Transient Improvement                                51
      5.3.2.10 Analog Back End                                            52
      5.3.2.11 Analog RGB Insertion                                       52
      5.3.2.12 CRT Measurement and Control                                52
      5.3.2.13 Synchronization and Deflection                             53
      5.3.2.14 EHT Compensation                                           53
  5.4 MICROCONTROLLER                                                     53
      5.4.1 MICROCONTROLLER FEATURES                                      53
      5.4.2 ACQUISITION FEATURES                                          54
      5.4.3 PORTS                                                         54
      5.4.4 CONTROLLER I/O PIN CONFIGURATION AND FUNCTION TABLE           54
      5.4.5 OVER CURRENT PROTECTION                                       55
  5.5 TELETEXT DISPLAY                                                    55
  5.6 SOUND PROCESSING                                                    56
      5.6.1 ANALOGUE SOUND IF - INPUT SECTION                             56
      5.6.2 QUADRATURE MIXERS                                             56
      5.6.3 PHASE AND AM DISCRIMINATION                                   56
      5.6.4 NICAM DECODER                                                 57
      5.6.5 DSP SECTION                                                   57
      5.6.6 SOUND MODE SWITCHING                                          57
  5.7 SOUND AMPLIFICATION                                                 57
      5.7.1 POWER AMPLIFIER                                               57
      5.7.2 MODE SELECTION                                                57
  5.8 VERTICAL DEFLECTION                                                 58
      5.8.1 FLYBACK VOLTAGE                                               58
      5.8.2 PROTECTION                                                    58
      5.8.3 GUARD CIRCUIT                                                 58
      5.8.4 DAMPING RESISTOR                                              58

                                         -3-
CP-850/F Service Manual

     5.8.5 EAST-WEST AMPLIFIER (TDA8358J ONLY)   58
6 SERVICE PARTS LIST                             59
7 SCHEMATIC DIAGRAM                              66
8 PRINTED CIRCULT BOARD                          67
9 EXPLODED VIEW                                  69




                                          -4-
                                                                          CP-850/F Service Manual

1 MAIN FEATURES
1.1 SPECIFICATIONS
1.1.1 GENERAL
     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                         29"(4:3) Real Flat :110W approx.
     consumption                   28"(16:9) Real Flat : 110W approx.
     Sound Output Power            7W x 2 (at 60% mod, 10%THD)
     Speaker                       12W 8 ohm x2
     Teletext system               9 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            28" : 66cm
                                   29" : 68cm
     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.
                                   AV3 : Audio-Video Jack on front of cabinet.
                                   Headphone jack (3.5 mm) on front of cabinet
                                   SVHS3 (option) : Jack on front of cabinet /sound
                                   input common with AV3.
     Remote Control                R-49C05



    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




                                                      -5-
CP-850/F Service Manual

1.2 CHANNEL/FREQUENCY TABLE




 1.2.1 CHANNEL/FREQUENCY TABLE




                                 -6-
                                            CP-850/F Service Manual


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

                                 -7-
CP-850/F 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
                                 -8-
                                                                                   CP-850/F Service Manual

1.3 ATSS SORTING METHOD

The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each
program checks if a VPS CNI code is transmitted (this system exists for German, Swiss and Austrian transmissions).
If no VPS CNI code is found, then the system checks if a CNI code is transmitted as part of the teletext transmission
( Packet 8/30 format 1 and format 2). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the
program is automatically named.
If the transmission does not have VPS CNI, and no teletext service is available, then there is no possibility of the
program being automatically named.
The programs found are then sorted in 4 groups :

Group I : It contains all the programs from the selected country and named by the TV controlling software. Within this
group the sorting order is fixed by the ATSS list.
Group II : It contains all the programs with a strong signal strength which are not listed in group I.
Group III : It contains all the programs with a weak signal strength which are not listed in group I.
Group IV : If two or more programs with the same code are found, only the strongest ( or if they have the same level
the one with the lowest frequency) is listed in group I, II or III. The others are listed in group IV.


1.3.1 GENERAL CASE                                                1.3.2 SPECIAL CASE
  Program                                                             Program
                            Group                Skip                                      Group                Skip
  number                                                              number
      1                                                                  1
      2                    Group I                                       ...              Group II
     ...                                                                 m
      n                                                                 m+1
    n+1                                                                  ...              Group III
     ...                   Group II                                      p
     m                                                                  p+1
    m+1                                                                  ...              Group IV
     ...                  Group III                                      q
      p                                                                 q+1
    p+1                                                                  ...              not used
     ...                  Group IV                                       99
      q                                                                  0
    q+1
                                                                  Special case : Country selection = Others
     ...                  not used
     99
      0




                                                            -9-
CP-850/F Service Manual

Note : If two programs with the same name but a different code are found these two programs
are listed in group I, II or III .

The sorting order within group II, III, and IV is based on the channel frequency. The program
with the lowest frequency is allocated the first rank in its group, and so forth until the last
program of the group which has the highest frequency.

Special case : France
If France is selected, the TV controlling software first sweeps all TV bands with France system
selected ( positive video modulation) and then a second time with Europe system selected
( negative video modulation).

Special case : Switzerland
If Switzerland is selected the TV controlling software first sweeps all TV bands with Europe
system selected (negative video modulation) and then a second time with France system
selected ( positive video modulation).

Special case : GB
Note for satellite receiver users : Before starting ATSS turn on your satellite receiver and tune to
"SKY NEWS"
If GB is selected the TV controlling software seeks for programs only in UHF ( C21 to C70 ).
The sorting order is :
1 - BBC1
2 - BBC2
3 - ITV
4 - CH4
5 - CH5
6 - NEWS (Sky News)

If two or more "identical" programs ( same name but different code e.g. BBC1 and BBC1
Scotland ) are found the following programs in the list will be shifted up. (1 - BBC1, 2 - BBC1, 3
-
BBC2, 4 - ITV, 5 - CH4, 6 - CH5, 7 - NEWS, ..)

If one of the programs above is not found, the associated program number remains empty
( freq.=467.25 MHz - Skip selected - no name ? system = GB).
example A : 1 - BBC1, 2 - BBC2, 3 - ITV, 4 - -----, 5 - CH5, 6 - NEWS, ...
example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - ITV, 5 - -----, 6 - CH5, 7 -
NEWS, ...




                                                -10-
                                                                  CP-850/F 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 25-26 KV (20"-21") or 26 KV (25" - 28") at max beam current.
   The high voltage must not, under any circumstances, exceed 27.5 KV (20"), 29KV (21"),
   29.5 KV (25") or 30 KV (28"). 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 240 volts, 5O 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.




                                               -11-
CP-850/F Service Manual

3 ALIGNMENT INSTRUCTIONS
3.1MICROCONTROLLER 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 V1.00".
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
                           2               RED GAIN
                           3               GRN GAIN
                           4               RED BIAS
                           5               GRN BIAS
                           6              AGC LEVEL
                           7             G2 - SCREEN
                           8                   AFT
                           9                OPTION1
                          10                OPTION2
                          11                OPTION3
                          12                   AVL
                          13              PARABOLA
                          14             HOR WIDTH
                          15              CORNER T
                          16              CORNER B
                          17             HOR. PARAL
                          18                V.LINEAR
                          19             EW TRAPEZ
                          20             S CORRECT
                          21             VERT CENT
                          22               VERT SIZE
                          23               SHIPPING
                          24              INST. LOCK
                          25               LKB LOCK                     HOTEL
                          26              AV1 START                    FUNCTION
                          27               MAX. VOL
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;

                                                         -12-
                                                                         CP-850/F Service Manual

3.3.1 OPTION 1




3.3.2 OPTION 2




3.3.3 OPTION 3




                                          Beam Current(mA)
                  Tube                                                    B2      B1      B0
                                           Nominal     Max
   4/3 - Real Flat, 16/9 



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