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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
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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
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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
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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
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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
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CP-850/F Service Manual
1.2 CHANNEL/FREQUENCY TABLE
1.2.1 CHANNEL/FREQUENCY TABLE
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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
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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
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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
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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, ...
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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.
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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;
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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