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S/M No.TCP850XEF0
Service Manual
CHASSIS : CP-850FX
MODEL : DTF-2950-100D DTF-2950GB-100D DTF-2950K-100D
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.
SEP.2006
CP-850FX Service Manual CONTENTS DOCUMENT HISTORY .................................................................................................................5 1 MAIN FEATURES...................................................................................................................6 1.1 SPECIFICATIONS ..............................................................................................................6 1.1.1 GENERAL......................................................................................................................6 1.1.2 EURO-SCART 1 (21 Pin) ..............................................................................................6 1.1.3 EURO-SCART 2 (21 Pin) ..............................................................................................7 1.2 CHANNEL/FREQUENCY TABLE .......................................................................................8 1.3 ATSS SORTING METHOD ...............................................................................................11 1.3.1 GENERAL CASE.........................................................................................................11 1.3.2 SPECIAL CASE...........................................................................................................11 SAFETY INSTRUCTION ......................................................................................................13 ALIGNMENT INSTRUCTIONS .............................................................................................14 3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE ........................................14 3.2 SERVICE MODE NAVIGATION........................................................................................14 3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS .............................................14 3.3.1 OPTION 1........................................................................................................................15 3.3.2 OPTION 2........................................................................................................................15 3.3.3 OPTION 3........................................................................................................................15 3.4 TV SET ALIGNMENT........................................................................................................16 3.4.1 LOCAL OSCILLATOR ALIGNMENT ...............................................................................16 3.4.2 G2 ALIGNMENT..............................................................................................................16 3.4.3 WHITE BALANCE ...........................................................................................................16 3.4.4 FOCUS............................................................................................................................16 3.4.5 VERTICAL GEOMETRY .................................................................................................16 3.4.6 HORIZONTAL PICTURE CENTRING .............................................................................16 3.4.7 EAST / WEST CORRECTION.........................................................................................16 3.4.8 AGC ................................................................................................................................17 IC DESCRIPTION.................................................................................................................18 4.1 TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER...................................18 4.1.1 BLOCK DIAGRAM OF THE SDA55XX........................................................................18 4.1.2 DESCRIPTION ............................................................................................................18 4.1.3 IC MARKING AND VERSION......................................................................................19 4.1.4 PINNING......................................................................................................................19 4.2 VSP94X5B (VERSION C4) OPTIMUS COLOR DECODER AND SCAN-RATE CONVERTER....................................................................................................................21 4.2.1 BLOCK DIAGRAM OF THE VSP94x5B ......................................................................21 4.2.2 Feature Overview ........................................................................................................22 4.2.3 PINNING......................................................................................................................23 4.3 DDP 3315C DISPLAY AND DEFLECTION PROCESSOR ............................................25 4.3.1 BLOCK DIAGRAM OF THE DDP 3315C.....................................................................25 4.3.2 DESCRIPTION ............................................................................................................25 4.3.3 PINNING......................................................................................................................27 4.4 MSP341X MULTISTANDARD SOUND PROCESSOR.....................................................29 4.4.1 BASIC FEATURES OF THE MSP 341X......................................................................29 4.4.1.1 Demodulator & NICAM Decoder Section ..................................................................29 4.4.1.2 DSP-Section (Audio Baseband Processing) .............................................................30 4.4.1.3 Analogue Section......................................................................................................30 4.4.1.4 NICAM & FM/AM-Mono ............................................................................................30 1
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CP-850FX Service Manual 4.4.1.5 German 2-Carrier System (DUAL FM System).........................................................30 4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR .......33 4.5.1 DESCRIPTION ............................................................................................................33 4.5.2 FEATURES..................................................................................................................33 4.5.3 PINNING......................................................................................................................33 4.5.4 BLOCK DIAGRAM.......................................................................................................34 4.6 TDA8946J STEREO AUDIO AMPLIFIER .........................................................................35 4.6.1 FEATURES..................................................................................................................35 4.7 TDA8358J VERTICAL AMPLIFIER...................................................................................37 4.7.1 FEATURES..................................................................................................................37 4.8 TDA6108JF .......................................................................................................................39 4.9 24C16 - 16 KB EEPROM ..................................................................................................40 4.10 STR W6754....................................................................................................................41 4.10.1 GENERAL DESCRIPTION ........................................................................................41 4.10.2 FEATURES................................................................................................................41 4.10.3 BLOCK DIAGRAM.....................................................................................................41 4.10.4 PIN DESCRIPTION ...................................................................................................42 4.10.5 MOSFET ELECTRICAL CHARACTERISTICS ..........................................................42 4.10.6 ELECTRICAL CHARACTERISTICS..........................................................................43 5 CP-850FX CHASSIS DESCRIPTION...................................................................................44 5.1 POWER SUPPLY BLOCK DIAGRAM...............................................................................44 5.2 VIDEO & STEREO AUDIO BLOCK DIAGRAM.................................................................45 5.3 IF SECTION ......................................................................................................................46 5.3.1 BLOCK DIAGRAM.......................................................................................................46 5.3.2 VISION IF AMPLIFIER ................................................................................................47 5.3.3 TUNER-AND VIF-AGC ................................................................................................47 5.3.4 FPLL, VCO AND AFC..................................................................................................47 5.3.5 VIDEO DEMODULATION AND AMPLIFIER ...............................................................48 5.3.6 SOUND IF AMPLIFIER AND SIF-AGC........................................................................48 5.3.7 QUASI-PARALLEL-SOUND (QPS) MIXER .................................................................48 5.3.8 STANDARD SWITCH ..................................................................................................48 5.3.9 L' SWITCH...................................................................................................................48 5.3.10 INTERNAL VOLTAGE STABILISER .........................................................................48 5.4 VIDEO / RGB ....................................................................................................................48 5.4.1 FRONT END................................................................................................................48 5.4.1.1 CVBS Front-End .......................................................................................................48 5.4.1.2 Input Selector............................................................................................................49 5.4.1.3 Signal Levels And Gain Control ................................................................................49 5.4.1.4 Synchronization ........................................................................................................49 5.4.1.5 Chroma Decoder ......................................................................................................49 5.4.1.6 Luminance Processing..............................................................................................49 5.4.1.7 RGB Front-End .........................................................................................................49 5.4.1.8 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 5.4.2 BACK END ..................................................................................................................50 5.4.2.1 Digital Input Interface ................................................................................................50 5.4.2.2 Horizontal Scaler ......................................................................................................50 5.4.2.3 Luma Contrast and Brightness .................................................................................51 2
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CP-850FX Service Manual 5.4.2.4 Black Level Expander/Compressor (BLEC) ..............................................................51 5.4.2.5 Luma Sharpness Enhancer (LSE) ............................................................................51 5.4.2.6 Dynamic Peaking......................................................................................................51 5.4.2.7 Luma Transient Improvement (LTI) ..........................................................................51 5.4.2.8 Mixing of Dynamic Peaking and LTI .........................................................................51 5.4.2.9 Chroma Transient Improvement ...............................................................................51 5.4.2.10 Analog Back End ....................................................................................................53 5.4.2.11 Analog RGB Insertion .............................................................................................53 5.4.2.12 CRT Measurement and Control ..............................................................................53 5.4.2.13 Synchronization and Deflection ..............................................................................54 5.4.2.14 EHT Compensation ................................................................................................54 5.5 MICRONTROLLER ...........................................................................................................54 5.5.1 MICROCONTROLLER FEATURES ............................................................................54 5.5.2 ACQUISITION FEATURES .........................................................................................54 5.5.3 PORTS ........................................................................................................................55 5.5.4 -CONTROLLER I/O PIN CONFIGURATION AND FUNCTION TABLE .....................55 5.5.5 TUNING .......................................................................................................................55 5.5.6 AUTOMATIC PICTURE FORMAT SWITCHING .........................................................56 5.5.6.1 WSS Data .................................................................................................................56 5.5.6.2 SCART Pin 8 Data (Slow Switching) ........................................................................57 5.5.6.3 Picture Format Description .......................................................................................57 5.3.1.8.1 16:9 CRT ...............................................................................................................57 5.3.1.8.2 4:3 CRT .................................................................................................................58 5.5.7 EXTERNAL SOURCE CONTROL LOGIC ...................................................................59 5.5.8 OVER CURRENT PROTECTION................................................................................60 5.6 TELETEXT DISPLAY........................................................................................................60 5.7 SOUND PROCESSING ....................................................................................................61 5.7.1 ANALOGUE SOUND IF - INPUT SECTION ...............................................................61 5.7.2 QUADRATURE MIXERS .............................................................................................61 5.7.3 PHASE AND AM DISCRIMINATION ...........................................................................61 5.7.4 NICAM DECODER ......................................................................................................62 5.7.5 DSP SECTION ............................................................................................................62 5.7.6 SOUND MODE SWITCHING.......................................................................................62 5.8 SOUND AMPLIFICATION.................................................................................................62 5.8.1 POWER AMPLIFIER ...................................................................................................62 5.8.2 MODE SELECTION.....................................................................................................63 5.9 VERTICAL DEFLECTION .................................................................................................63 5.9.1 FLYBACK VOLTAGE ..................................................................................................63 5.9.2 PROTECTION .............................................................................................................63 5.9.3 GUARD CIRCUIT ........................................................................................................63 5.9.4 DAMPING RESISTOR.................................................................................................63 5.9.5 EAST-WEST AMPLIFIER ............................................................................................63 5.10 POWER SUPPLY (STR-W6754) - FUNCTIONS OF EACH TERMINAL ..........................64 5.10.1 Vcc Terminal (Pin 4)...................................................................................................64 5.10.1.1 Start-up Circuit........................................................................................................64 5.10.1.2 Auxiliary/Drive Winding ...........................................................................................65 5.10.1.3 Overvoltage Protection Circuit ................................................................................66 5.10.1.4 Latch Circuit............................................................................................................67 5.10.2 SS/OLP Terminal (Pin 5) ..........................................................................................67 5.10.2.1 Soft-Start Operation at Start-up of Power Supply ...................................................67 5.10.2.2 Overload Protection ................................................................................................68 5. 10. 2. 3 Operation at Power Supply OFF ...........................................................................69 Europe R&D 3
CP-850FX Service Manual 5.10.2.4 Cancellation of OLP Circuit.......................................................................................69 5.10.3 FB Terminal (Pin. 6)...................................................................................................70 5.10.3.1 Constant Voltage Control Circuit.............................................................................70 5.10.4 OCP/BD Terminal (Pin 7)...........................................................................................71 8.4.1. Minus-Detection Type OCP Circuit .............................................................................71 5.10.5 Quasi-Resonant and Bottom-Skip Operation.............................................................72 5.10. 5. 1 Quasi-Resonant Operation.....................................................................................72 5.10.5.2 Bottom-Skip Operation (Switching from Quasi-Resonant Operation) .....................73 1). Quasi-Resonant Operation Bottom-Skip Operation .............................................73 2). Bottom-Skip Operation Quasi-Resonant Operation ...............................................73 5.10.6 Stand-By Operation ...................................................................................................74 5.10.7 Step-Drive Circuit.......................................................................................................76 5.10.8 Maximum ON Time Controlling Function ...................................................................76 6 7 8 SERVICE PARTS LIST ........................................................................................................77 6.1 DTF-2950 ..........................................................................................................................77 EXPLODED VIEW ................................................................................................................85 7.1 DTF-2950 ..........................................................................................................................85 PRINTED CIRCUIT BOARD.................................................................................................86 8.1 MAIN PCB.........................................................................................................................86 8.2 UNION PCB .............................................................................................................................87 8.3 CRT PCB ..........................................................................................................................88 SCHEMATIC DIAGRAM.......................................................................................................89 9.1 MAIN .................................................................................................................................89 9.2 UNION & CRT...................................................................................................................90
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CP-850FX Service Manual DOCUMENT HISTORY VERSION DATE COMMENTS V1.00 31/07/06 Creation of document (Author JS KIM) for project CP-850FX 100Hz TV.
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CP-850FX Service Manual 1 1.1 MAIN FEATURES SPECIFICATIONS
1.1.1 GENERAL TV standard Colour system Sound system Power consumption Sound Output Power Speaker Teletext system Aerial input Channel coverage Tuning system Visual screen size Channel indication Program Selection Aux. terminal PAL/SECAM-B/G, D/K, PAL-I/I, SECAM-L/L' Tuner PAL, SECAM AV PAL, SECAM, PAL 60, NTSC M, NTSC 4.43 NICAM B/G, I, D/K, L, FM 2Carrier B/G, D/K 105W 7W x 2 (at 60% mod, 10%THD) 12W 8 ohm x2 9 pages memory FASTEXT (FLOF or TOP) 75 ohm unbalanced Off-air channels, S-cable channels and hyperband frequency synthesiser tuning system 68cm On Screen Display 100 programmes 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 side of cabinet. Headphone jack (3.5 mm) on side of cabinet SVHS3 : Jack on side of cabinet sound input common with AV3. R-49C10(AAA)
Remote Control Unit
1.1.2 EURO-SCART 1 (21 Pin) Pin 1 2 3 4 5 6 7 8 9 Signal Description Audio Output Right Audio Input Right Audio Output Left Audio Earth Blue Earth Audio Input Left Blue Input Slow Switching Green Earth 6 Matching value 0.5 Vrms, Impedance < 1 k, ( RF 54% Mod ) 0.5 Vrms, Impedance > 10 k 0.5 Vrms, Impedance < 1 k, ( RF 54% Mod )
0.5 Vrms, Impedance > 10 k 0.7 Vpp ±0.1V, Impedance 75 TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , Impedance > 10 k
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CP-850FX Service Manual 10 11 12 13 14 15 16 17 18 19 20 21 N.C. Green Input N.C. Red Earth Blanking Earth Red Input Fast Switching Video Out Earth Video In Earth Video Output Video Input Common Earth
0.7 Vpp ± 0.1V, Impedance 75
0.7 Vpp ± 0.1V, Impedance 75 0 to 0.4V : Logic "0", 1 to 3V : Logic "1", Impedance 75 1 Vpp ± 3dB, Impedance 75 1 Vpp ± 3dB, Impedance 75
1.1.3 EURO-SCART 2 (21 Pin) Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Signal Description Audio Output Right Audio Input Right Audio Output Left Audio Earth Earth Audio Input Left N.C. Slow Switching Earth N.C. N.C. N.C. Earth Earth Chroma Input N.C. Earth Video In Earth Video Output Video Input, Y In. Common Earth Matching value 0.5 Vrms, Impedance < 1 k, ( RF 54% Mod ) 0.5 Vrms, Impedance > 10 k 0.5 Vrms, Impedance < 1 k, ( RF 54% Mod )
0.5 Vrms, Impedance > 10 k TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , Impedance > 10 k
± 3dB for a luminance signal of 1 Vpp
1 Vpp ± 3dB, Impedance 75 ( Monitor output ) 1 Vpp ± 3dB, Impedance 75
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CP-850FX Service Manual 1.2 CHANNEL/FREQUENCY TABLE EUROPE CCIR 46.25 48.25 55.25 62.25 175.25 182.25 189.25 196.25 203.25 210.25 217.25 224.25 53.75 82.25 183.75 192.25 201.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 639.25 647.25 655.25 663.25 671.25 FRANCE 55.75 (L') 60.5 (L') 63.75 (L') 176.00 184.00 192.00 200.00 208.00 216.00 189.25 (LUX) 69.25 (L') 76.25 (L') 83.25 (L') 90.25 97.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 639.25 647.25 655.25 663.25 671.25 GB(IRELAND) 45.75 53.75 61.75 175.25 183.25 191.25 199.25 207.25 215.25 223.25 231.25 239.25 247.25 49.75 57.75 65.75 77.75 85.75 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 639.25 647.25 655.25 663.25 671.25 EAST OIRT 49.75 59.25 77.25 85.25 93.25 175.25 183.25 191.25 199.25 207.25 215.25 223.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 639.25 647.25 655.25 663.25 671.25 8
CHANNEL C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 Europe R&D
CP-850FX Service Manual C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 S01 S02 S03 S04 S05 S06 S07 S08 S09 S10 S11 S12 S13 S14 S15 S16 S17 S18 Europe R&D 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 69.25 76.25 83.25 90.25 97.25 59.25 93.25 105.25 112.25 119.25 126.25 133.25 140.25 147.25 154.25 161.25 168.25 231.25 238.25 245.25 252.25 259.25 266.25 273.25 280.25 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 104.75 116.75 128.75 140.75 152.75 164.75 176.75 188.75 200.75 212.75 224.75 236.75 248.75 260.75 272.75 284.75 296.75 136.00 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 103.25 111.25 119.25 127.25 135.25 143.25 151.25 159.25 167.25 255.25 263.25 271.25 279.25 287.25 295.25 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 105.25 112.25 119.25 126.25 133.25 140.25 147.25 154.25 161.25 168.25 231.25 238.25 245.25 252.25 259.25 266.25 273.25 280.25 9
CP-850FX Service Manual S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 S41 287.25 294.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25 160.00 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25 287.25 294.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25
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CP-850FX 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 number 1 2 ... n n+1 ... m m+1 ... p p+1 ... q q+1 ... 99 0 Group Group I Skip Program number 1 ... m m+1 ... p p+1 ... q q+1 ... 99 0 Group Group II Skip
Group II
Group III
Group III
Group IV
Group IV
not used
not used Special case : Country selection = Others
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CP-850FX 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-850FX 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 230 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-850FX Service Manual 3 3.1 ALIGNMENT INSTRUCTIONS MICROCONTROLLER CONFIGURATION : SERVICE MODE
To switch the TV set into service mode please see instruction below. 1 - Select PR. number 91 2 - Adjust sharpness to minimum and exit all menus. 3 Within 2 seconds press the key sequence : RED - GREEN - menu The software version is displayed beside the word Service, e.g. "SERVICE V1.00". To exit SERVICE menu press menu key or Std 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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 3.3 Item HOR CEN RED GAIN GRN GAIN BLUE GAIN RED BIAS GRN BIAS AGC LEVEL G2 SCREEN AFT AVL OPTION1 OPTION2 OPTION3 PARABOLA HOR WIDTH CORNER T CORNER B HOR. PARAL V. LINEAR EW TRAPEZ S CORRECT VERT CENT VERT SIZE SHIPPING Default setting Note:All settings are approximate -154 412 363 380 226 210 56 32 32 OFF 0011 1000 [0x38] 0000 0110 [0x06] 1111 1111 [0xFF] 346 -71 -100 -30 2 16 12 130 -14 40 OFF
MICROCONTROLLER CONFIGURATION : OPTION BITS
There are three option bytes available (16 bits in all). These option bits are available from Service mode. First find the OPTION1 or OPTION2 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; Europe R&D 14
CP-850FX Service Manual 3.3.1 OPTION 1 B7 1 TOP Teletext OFF TOP Teletext ON B6 FASTEXT (FLOF) OFF FASTEXT (FLOF) ON B5 TUBE 4:3 B4 Headphone Volume/Bal ance control OFF Headphone Volume/Bal ance control ON B3 Dolby Virtual OFF Dolby Virtual ON B2 SVHS3 disable B1 B0
Tuner options 00 = Philips 01 = not used 10 = ALPS 11 = PARTSNIC
0
TUBE 16:9
SVHS3 enable
3.3.2 OPTION 2 B7 1 Fixed to `0' 0 B6 JVC remote control Daewoo Remote control B6 B5 AVL control OFF AVL control ON B5 B4 PICTURE TILT ON PICTURE TILT OFF B3 Program list enabled Program list disabled B3 B2 B1 B0
See table below
3.3.3 OPTION 3 B7 1 Must be set to "1" for future compatibility 0 B4 Local keyboard : 6 keys B2 OSD display "AV" in extern mode OSD display "EXT" in extern mode (JVC only) B1 AV3 Enabled B0 Full ATSS
Local keyboard : 5 keys
Must be set to "1" for future compatibi lity ( See CP830 NEC)
AV3 Disable d (NEC only)
Basic ATSS
Tube
Beam Nominal 0.95 1.00 1.05 1.10 1.20 1.25 1.30 1.35
LG PHILIPS CRT SAMSUNG SDI CRT
Current (mA) Max 1.10 1.15 1.20 1.25 1.35 1.40 1.45 1.50
B2 0 0 0 0 1 1 1 1
B1 0 0 1 1 0 0 1 1
B0 0 1 0 1 0 1 0 1
All values modified are immediately memorised in eeprom.
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CP-850FX Service Manual 3.4 TV SET ALIGNMENT
3.4.1 LOCAL OSCILLATOR ALIGNMENT Tune a colour bar pattern. The frequency of the signal carrier must be accurate ( Max +/- 10KHz deviation from the nominal channel frequency). Find "AFT" item in service mode. Adjust the coil L150 to bring the cursor to central position : 32. 3.4.2 G2 ALIGNMENT - Tune a colour bar pattern. - Find the "G2 SCREEN" item in service mode. - Adjust screen volume ( on FBT ) to bring the cursor to central position : 32. 3.4.3 WHITE BALANCE - Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature. - Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature. 3.4.4 FOCUS Adjust the Focus volume ( on FBT ) to have the best resolution on screen. 3.4.5 VERTICAL GEOMETRY Adjust V. LINEAR (linearity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude), VERT CENT (vertical centring) to compensate for vertical distortion.
3.4.6 HORIZONTAL PICTURE CENTRING Adjust HOR CEN (Horizontal centre) to have the picture in the centre of the screen. 3.4.7 EAST / WEST CORRECTION Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, to compensate for geometrical distortion.
HOR PARAL
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CP-850FX Service Manual
HOR WIDTH adjust for 93% overscan.
PARABOLA
CORNER B & CORNER T
EW TRAPEZ 3.4.8 AGC - Make sure option bits are correct for the tuner fitted on the chassis (See above how to change option bits). - Adjust the antenna signal level at 62 dBV± 1 - Tune a colour bar pattern. - Find the "AGC" item in service mode. - Press the key "OK" on the remote keypad and wait until AGC level stabilise to the optimum value. - Alternatively, use "Vol Up/Dwn" keys to adjust manually to the desired Tuner Take Over Point (TOP). 17 Europe R&D
CP-850FX Service Manual 4 4.1 IC DESCRIPTION TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER
TVText Pro is a 8-bit controller based on a enhanced 8051 core with embedded teletext, On screen Display and TV controller functions. 4.1.1 BLOCK DIAGRAM OF THE SDA55XX
4.1.2 DESCRIPTION The SDA 55xx is a single chip teletext decoder for decoding World System Teletext data as well as Video Programming System (VPS), Program Delivery Control (PDC), and Wide Screen Signalling (WSS) data used for PAL plus transmissions (line 23). The device provides an integrated general-purpose, fully 8051-compatible Microcontroller with television specific hardware features. The microcontroller has been enhanced to provide powerful features such as memory banking, data pointers and additional interrupts etc. The on-chip display unit for displaying Level 1.5 teletext data is also used for customer defined on-screen displays. Internal XRAM consists of 16 Kbytes. Device has an internal ROM of 128 Kbytes. The SDA 55xx supports a wide range of standards including PAL, NTSC and contains a digital slicer for VPS, WSS, PDC, TTX and Closed Caption, an accelerating acquisition hardware module, a display generator for Level 1.5 TTX data and powerful On screen Display capabilities based on parallel attributes, and Pixel oriented characters (DRCS). The 8-bit Microcontroller runs at 360 ns. cycle time (min.). Controller with dedicated hardware does most of the internal TTX acquisition processing, transfers data to/from external memory Europe R&D 18
CP-850FX Service Manual interface and receives/transmits data via I 2 C-firmware user-interface. The slicer combined with dedicated hardware stores TTX data in a VBI buffer of 1 Kilobyte. The Microcontroller firmware performs all the acquisition tasks (hamming-and parity-checks, page search and evaluation of header control bits) once per field. Additionally, the firmware can provide high-end Teletextfeatures like Packet-26-handling, FLOF, TOP and list-pages. 4.1.3 IC MARKING AND VERSION Chassis IC marking OSD languages BULGARIAN, CZECH, GERMAN, DANISH, SPANISH, FRENCH, FINNISH, ENGLISH, GREEK, HUNGARIAN, ITALIAN, NORWEGIAN, DUTCH, POLISH, ROMANIAN, RUSSIAN, SWEDISH, SLOVAKIAN. ATSS countries Austria, Belgium, Switzerland, Czech Republic, Germany, Denmark, Spain, France, Finland, GB, Greece, Hungary, Italy, Ireland, Norway, Netherlands, Portugal, Poland, Sweden, Slovak Republic, Others Text
CP850FX
SDA555X FL
PAN-EUROPEAN LATIN, CYRILLIC, GREEK.
4.1.4 PINNING PSDIP 52-pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Europe R&D Pin Name SCL SDA S/SW2 S/SW2 S/SW1 S/SW1 n.c. Reset Out VDD2.5 VSS VDD3.3 CVBS VDDA2.5 VSSA AFT AGC KEY OCP HS VS MODESW L/L' Type IN/OUT IN/OUT IN IN IN IN OUT IN IN IN IN IN IN IN IN IN IN IN IN OUT OUT Short Description Software driven I2C bus Clock line Software driven I2C bus Data line Slow switching control for SCART 2. (See Microcontroller I/O pin configuration) Slow switching control for SCART 1. (See Microcontroller I/O pin configuration) Driven by controlling software to reset video IC's. Supply voltage 2.5V Ground (0V) Input/Output 3.3V CVBS input for the acquisition circuit Supply voltage for analog components Ground for analog components ADC input, AFT input ADC input, for AGC alignment only ADC input, local key sensing Switch Off the set when the voltage goes below a trigger level Horizontal sync for OSD/Txt synchronisation Vertical sync for OSD/Txt synchronisation High : Negative video modulation (B, G, D, K,I) Low : Positive video modulation (L / L') High : L', Low : L 19
CP-850FX Service Manual 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 IR INT n.c. n.c. n.c. n.c. VSS VDD3.3 n.c. n.c. RESET XTAL2 XTAL1 VSSA VDDA2.5 R OUT G OUT B OUT BK OUT VDD2.5 VSS VDD3.3 n.c. n.c. n.c. AGC n.c. n.c. LED POWER IN IN Remote control signal input Interrupt input from audio processor
IN IN IN OUT IN IN IN OUT OUT OUT OUT IN IN IN
Ground (0V) Input/Output 3.3V A low level on this pin resets the device. Output of the inverting oscillator amplifier Input of the inverting oscillator amplifier Ground for analog components Supply voltage for analog components Red output Green output Blue output Blanking Supply voltage 2.5V Ground (0V) Input / Output 3.3V
OUT OUT OUT
Tuner TOP adjustment High : Green LED, Low : Red LED High : SMPS ON, Low : SMPS in stand by
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CP-850FX Service Manual 4.2 VSP94x5B (version C4) OPTIMUS Color Decoder and Scan-Rate Converter
The VSPB family supports 15/32kHz systems and is available with different options. VSP 94x5B has one channel only. 4.2.1 BLOCK DIAGRAM OF THE VSP94x5B
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CP-850FX Service Manual 4.2.2 Feature Overview Different application modes FSM : Frame based high performance master with PIP SSC : Split screen ("Double Window") Data acquisition connectivity Up to seven (VSP 9425B/9427B: nine) CVBS inputs, up to two Y/C inputs Up to three CVBS outputs (even when Y/C input) ITU-R 656 compatible digital input RGB/FBL or YUV or YUV-H-V input 9 bit amplitude resolution for CVBS/Y/C A/D converter 8 bit amplitude resolution for RGB/FBL A/D converter Multi-standard color decoder with 4H comb-filter PAL/NTSC/SECAM including all substandard Automatic recognition of chroma standard AGC (Automatic Gain Control) Temporal noise reduction for master and slave channel Field or frame based temporal noise reduction for luminance and chrominance Pre-scaling of the 1fH signal Horizontal scaling factors: 3/2...1...1/28 Vertical scaling factors: 1...1/30 Horizontal and vertical scaling of the 2fH signal Horizontal Scaling factors: 3...0.75 5 zone horizontal panorama generator Vertical scaling of the 2f H signal Vertical scaling factors: 8...0.92 5 zone vertical panorama generator Detection circuits Global motion and global still detection Film mode and phase detection (PAL, NTSC; 2-2, 3-2 pull down) Measurement of the noise level (blanking) Detection of letter box formats Embedded memory On-chip memory controller Embedded DRAM core for field memory SRAM for delay lines Data format 4:2:2 Data slicer for closed caption ("V-chip") and WSS Flexible clock and synchronization concept Horizontal line-locked or free-running mode Vertical locked or free-running mode Scan-rate-conversion Motion adaptive frame based 100/120 Hz interlaced scan-rate conversion Motion adaptive frame based 50/60 Hz progressive scan-rate conversion Special treatment for film material ("Inverse 3-2 pull down") Large area and line flicker reduction Simple progressive modes: AB, AA* Simple interlaced modes (100/120 Hz): ABAB, AABB, AAAA, BBBB No scan-rate-conversion modes (50/60 Hz): AB, AA, BB Signal manipulations Still field or still frame Insertion of colored background 22
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CP-850FX Service Manual 2D and 3D frames for master and slave channel Vertical chrominance shift for improved VCR picture quality Contrast, brightness and saturation control Sharpness improvement Digital color transition improvement (DCTI) Adaptive horizontal and vertical peaking (luminance) Digital luminance transition improvement (DLTI) Digital contrast improvement (DCI, master channel only) Three D/A converters 9 bit amplitude resolution for YUV, RGB output (Nominal) 72 MHz clock frequency with two-fold oversampling I2C bus control (400 kHz) 1.8 V± 5% and 3.3 V ± 5% supply voltages PMQFP80-1 or PMQFP144-1 packages Only one crystal necessary for whole IC and all color standards
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4.2.3 PINNING Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Europe R&D Name VDDDACY AYOUT VSSDACY VSSD2 VDDD2 SDA TMS 656VIN/BLANK 656CLK 656IO7 VSSP2 VDDP2 SCL V 656IO6 656IO5 HOUT H50 ADR / TDI V50 656IO4 656IO3 VOUT RESET VDDP3 VSSP3 CLKOUT VDDD3 VSSD3 656IO2 656IO1 656IO0 I/O S O S S S I/O I I/O I/O I/O S S I I I/O I/O O O I O I/O I/O O I S S O S S I/O I/O I/O Description DAC(Y) Y output DAC(Y) Supply voltage for digital (0V digital) Supply voltage for digital(1.8V digital) I2C-Bus data Testmode select (Connected to vdd33) Separate V input for 656 / BLANK output Digital input / output clock Digital input / output (MSB) Supply voltage for digital (0 V pad) Supply voltage for digital (3.3 V pad) I2C-Bus clk Vertical pulse for RGB input Digital input / output Digital input / output Horizontal output Hout 50 Hz I2C address / test data in Vout 50 Hz Digital input / output Digital input / output Vertical output Reset input (Reset active low) Supply voltage for digital (3.3 V pad) Supply voltage for digital (0 V pad) Output clock (27 MHz nom.) Supply voltage for DRAM (1.8 V digital) Supply voltage for digital (0 V digital) Digital input / output Digital input / output Digital input / output (LSB) 23
CP-850FX Service Manual 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 Europe R&D VSSD4 VDDD4 VDDAFBL VSSAFBL FBL1 FBL2 RIN1 GIN1 BIN1 VDDARGB VDDARGB VDD33RGB VDD33RGB RIN2 GIN2 BIN2 VSSD5 VDDAC1 VSSAC1 CVBS1 CVBS2 CVBS3 CVBS4 CVBS5 CVBS6 CVBS7 VDD33C VSS33C CVBSO3 CVBSO2 CVBSO1 VDDAC2 VSSAC2 VDDD1 VSSD1 VDDAPLL XOUT XIN TCLK VDDP1 VSSP1 656HIN/CLKF20 VDDDACV AVOUT VSSDACV VDDDACU AUOUT VSSDACU S S S S I I I I I S S S S I I I S S S I I I I I I I S S O O O S S S S S O I I S S I/O S O S S O S Supply voltage for digital (0 V digital) Supply voltage for digital 1.8 V digital Supply voltage for FBL (1.8 V) Supply voltage for FBL (0 V) Fast Blank input 1 (H1) (Analog input) Fast Blank input 2 (H2) (Analog input) R or V in1 (Analog input) G or Y in1 (Analog input) B of U in1 (Analog input) Supply voltage for RGB (1.8 V) Supply voltage for RGB (0 V) Supply voltage RGB (3.3 V) Supply voltage RGB (0 V) R or V in2 (Analog input) G or Y in2 (Analog input) B of U in2 (Analog inpu) Supply voltage for digital (0 V) Supply voltage CVBS1 (1.8 V) and digital core supply Supply voltage CVBS1 (0 V) CVBS input (Analog input) CVBS input (Analog input) CVBS input (Analog input) CVBS input or Y1 (Analog input) CVBS input or C1 (Analog input) CVBS input or Y2 (Analog input) CVBS input or C2 (Analog input) Supply voltage CVBS (3.3 V) Supply voltage CVBS (0 V) CVBS output 3 (Analog output) CVBS output 2 (Analog output) CVBS output 1 (Analog output Supply voltage CVBS2 (1.8 V) Supply voltage CVBS2 (0 V) Supply voltage for digital (1.8 V digital) Supply voltage for digital (0 V digital) Supply voltage for PLL (1.8 V) Crystal connection 2 Crystal connection 1 Testclock Supply voltage for digital (3.3 V pad) Supply voltage for digital (0 V pad) Separate H input for 656 / 20.25 clock output DAC (V) V output DAC (V) DAC (U) U output DAC (U) 24
CP-850FX Service Manual 4.3 DDP 3315C DISPLAY AND DEFLECTION PROCESSOR
The DDP 3315C is a mixed-signal single-chip digital display and deflection processor, designed for high-quality backend applications in double scan and HDTV TV sets with 4:3 or 16:9 picture tubes. The interfaces qualify the IC to be combined with state of the art digital scan rate converters, as well as analog HDTV sources. The DDP 3315C contains the entire digital video component, deflection processing, and all analog interfaces to display the picture on a CRT. 4.3.1 BLOCK DIAGRAM OF THE DDP 3315C
4.3.2 DESCRIPTION Video Processing linear horizontal scaling (0.25 ... 4), as well as nonlinear horizontal scaling "panorama vision" dynamic black level expander luma sharpness enhancement by dynamic peaking and luma transient improvement (LTI) color transient improvement (CTI) programmable RGB matrix black stretch, blue stretch, gamma correction via programmable Non-linear Colorspace Enhancer (NCE) on RGB two analog double scan inputs with fast blank (one RGB and one RGB/YC r C b /YP r P b selectable) average and peak beam current limiter automatic picture tube adjustment (cutoff, drive) histogram calculation Deflection Processing scan velocity modulation output digital EHT compensation for vertical / east-west soft start/stop of horizontal-drive vertical angle and bow correction differential vertical outputs vertical zoom via deflection adjustment horizontal and vertical protection circuit 25 Europe R&D
CP-850FX Service Manual horizontal frequency for VGA/SVGA/1080I black switch off procedure supports horizontal and vertical dynamic focus Miscellaneous selectable ITU-R 601 4:1:1 / 4:2:2 YC r C b input at 27/32 MHz or double scan ITU-R 656 input at 54 MHz line-locked clock crystal oscillator for horizontal safety picture frame generator hardware for simple 50/60 Hz to 100/120 Hz conversion (display frequency doubling) PQFP80 package, 5 V analog and 3.3 V digital supply
IC architecture A clock generator converts different external line locked clock rates to a common internal sample rate of ~40 MHz, in order to provide a higher horizontal resolution. The input interface accepts ITU-R 601 at 27 or 32 MHz and ITU-R 656 with encoded or external sync at 54 MHz. The horizontal scaler is used for the scan rate conversion and for the nonlinear aspect ratio conversion as well. For the picture improvement, luma and chroma are processed separately. The luminance contrast ratio can be extended with a dynamic black level expander. In addition the frequency characteristic is improved by a transient improvement (LTI) and an adaptive dynamic peaking circuit. The peaking adapts to small AC amplitudes of high frequency parts, while large AC amplitudes are processed by the LTI. The chroma signal is enhanced with a transient improvement (CTI) with proper limitation to avoid wrong colours. The full programmable RGB matrix covers control of colour saturation and temperature. A digital white drive control is used to adjust the white balance and for the beam current limitation to prevent the CRT from over-load. A non-linear colorspace enhancer (NCE) for RGB gives full flexibility for any amplitude characteristic. High speed10-bit D/A converters are used to convert digital RGB to analog signals. Separate 9bit D/A converters control brightness and cutoff. For picture tubes equipped with an appropriate yoke a scan velocity modulation (SVM) signal is calculated using a differentiated luminance signal. Two analog sources can be inserted in the main RGB, controlled by separate fastblank (FBL) signals. Contrast and brightness are adjusted separately from main RGB. One input is dedicated to RGB for on screen display (OSD). The second input is processed with an analog RGB matrix to insert YCbCr/YpbPr or RGB with control of colour saturation and programmable half contrast. The bandwidth of ~30MHz guarantees pixel based graphics to be displayed with full accuracy. All previously mentioned features are implemented in dedicated hardware. An integrated processor controls the horizontal and vertical deflection, tube measurement loops and beam current limitation. It is also used to calculate an amplitude histogram of the displayed image. The horizontal deflection is synchronized with two numeric phase-locked loops (PLL) to the incoming sync. One PLL generates the horizontal timing signals, e.g. blanking and key-clamping. The second PLL adjusts the phase of the horizontal drive pulse with a subpixel accuracy less than 1 ns. Vertical deflection and east/west correction waveforms are calculated as 6th order polynomials. This allows adjustment of an east/west parabola with trapezoidal, pincushion and an upper/lower corner correction (even for real flat CRT's), as well as a vertical sawtooth with linearity and Scorrection. Scaling both waveforms, and limiting to fix amplitudes, performs a vertical zoom or compression of the displayed image. A field and line frequent control loop compensates picture content depending EHT distortions.
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CP-850FX Service Manual 4.3.3 PINNING Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Europe R&D Pin Name Y6 Y7 656EN LLC2 HS VS FREQSEL CM1 CM0 VS2 XTAL2 XTAL1 NC GNDP VSUPP FIFORRD FIFORD FIFOWR FIFORWR PWM1 PWM2 PWMV HOUT VSTBY DFVBL HSYNC VSYNC NC ASG1 HFBL SAFETY VPROT RSW2 RSW1 SENSE GNDM VERT+ VERTEW NC SVM ROUT GOUT BUT GNDO XREF VSUPO I/O I I I I I I I I I I O I S S O O O O O O O O S O O O S I I I O I/O I S O O O O O O O S I S Description Picture bus Luma Picture bus Luma (MSB) Enable 656 input mode System clock input Horizontal Sync Input Vertical Sync Input Selection of H-Drive Frequency Range Clock select 1 Clock select 0 Additionnal VSYNC input Analog Crystal Output Analog Crystal Input Ground, Output Pin Driver Supply voltage, Output Pin Driver FIFO Read Counter Reset FIFO Read Enable FIFO Write Enable FIFO Write Counter Reset I2C controlled DAC I2C controlled DAC / Tilt output I2C controlled DAC Horizontal drive output Standby supply voltage, Hout generation Dynamic focus blanking / horizontal DAF pulse Horizontal sync output Vertical sync output Analog Shield Ground Horizontal flyback input Safety input Vertical protection input Range Switch2, measurement ADC Range Switch1, measurement ADC Sense ADC input Ground, MADC input Differential Vertical Sawtooth Output Differential Vertical Sawtooth Output East / West Correction Output Scan Velocity Modulator Analog Output Red Analog Output Green Analog Output Blue Ground, analog Back End Reference Input for RGB DAC's Supply voltage, Analog Back End 27 Remarks
CP-850FX Service Manual 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 VRD/BCS AGND FBLIN1 RIN1 GIN1 BIN1 FBLIN2 RIN2 / PR GIN2 / Y BIN2/ PB ASG2 HCS NC TEST RESQ SCL SDA C0 C1 C2 C3 C4 C5 C6 C7 VSUPD GNDD Y0 Y1 Y2 Y3 Y4 Y5 I S I I I I I I I I S I I I I/O I/O I I I I I I I I S S I I I I I I DAC Reference, Beam current safety Analog Ground for Analog Matrix Fast Blank1input Analog Red1input Analog Green1 input Analog Blue1input Fast Blank2 input Analog Red2 input / PR Input Analog Green2 input / Y Input Analog Blue2 input / PB Input Analog Shield Ground Half Contrast Reset Input, active low I2C Bus clock I2C Bus data Picture Bus Chroma (LSB) Picture Bus Chroma Picture Bus Chroma Picture Bus Chroma Picture Bus Chroma Picture Bus Chroma Picture Bus Chroma Picture Bus Chroma (MSB) Supply voltage, Digital Circuitry Ground, Digital Circuitry Picture Bus Luma (LSB) Picture Bus Luma Picture Bus Luma Picture Bus Luma Picture Bus Luma Picture Bus Luma
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CP-850FX Service Manual 4.4 MSP341X MULTISTANDARD SOUND PROCESSOR
The MSP 341x is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards. The MSP3411 has all functions of MSP3410 with the addition of a virtual surround sound features. Surround sound can be reproduced to a certain extent with two loudspeakers. The MSP3411 includes virtualizer algorithm "3D Panorama" which has been approved by the Dolby laboratories for compliance with the "Virtual Dolby Surround" technology. In addition, the MSP3411 includes Micronas "Panorama" algorithm. MSP 341x features: sound IF input No external filters required Stereo baseband input via integrated AD converters Two pairs of DA converters Two carrier FM or NICAM processing AVC : Automatic Volume Correction Bass, treble, volume processing Full SCART in/out matrix without restrictions Improved FM-identification Demodulator short programming Auto-detection for terrestrial TV - sound standards Precise bit-error rate indication Automatic switching from NICAM to FM/AM or vice versa Improved NICAM synchronisation algorithm Improved carrier mute algorithm Improved AM-demodulation Reduction of necessary controlling Less external components 4.4.1 BASIC FEATURES OF THE MSP 341X 4.4.1.1 Demodulator & NICAM Decoder Section The MSP 341x is designed to simultaneously perform digital demodulation and decoding of NICAM-coded TV stereo sound, as well as demodulation of FM or AM mono TV sound. Alternatively, two carrier FM systems according to the German terrestrial specs can be processed with the MSP 341x. The MSP 341x facilitates profitable multistandard capability, offering the following advantages: Automatic Gain Control (AGC) for analogue input: input range: 0.10 - 3 Vpp integrated A/D converter for sound-IF input all demodulation and filtering is performed on chip and is individually programmable easy realisation of all digital NICAM standards (B/G, I, L and D/K) FM-demodulation of all terrestrial standards (include identification decoding) no external filter hardware is required only one crystal clock (18.432 MHz) is necessary high deviation FM-mono mode (max. deviation: approx. ±360 kHz) Europe R&D 29
CP-850FX Service Manual 4.4.1.2 DSP-Section (Audio Baseband Processing) flexible selection of audio sources to be processed performance of terrestrial de-emphasise systems (FM, NICAM) digitally performed FM-identification decoding and de-matrixing digital baseband processing: volume, bass, treble simple controlling of volume, bass, treble 4.4.1.3 Analogue Section two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25 k one selectable analogue mono input (i.e. AM sound): Not used in this chassis two high-quality A/D converters, S/N-Ratio: >85 dB 20 Hz to 20 kHz bandwidth for SCART-to-SCART copy facilities loudspeaker: one pair of four-fold oversampled D/A converters. Output level per channel: max. 1.4 VRMS output resistance: max. 5 k. S/N-ratio: >85 dB at maximum volume max. noise voltage in mute mode: < 10 V (BW: 20 Hz... 16 kHz) one pair of four-fold oversampled D/A converters supplying a pair of SCART-outputs. Output level per channel: max. 2 V RMS, output resistance: max. 0.5 k, S/N-Ratio: >85 dB (20 Hz... 16 kHz) 4.4.1.4 NICAM & FM/AM-Mono According to the British, Scandinavian, Spanish, and French TV-standards, high-quality stereo sound is transmitted digitally. The systems allow two high-quality digital sound channels to be added to the already existing FM/AM-channel. The sound coding follows the format of the socalled Near Instantaneous Companding System (NICAM 728). Transmission is performed using Differential Quadrature Phase Shift Keying (DQPSK. Table below offers an overview of the modulation parameters. In the case of NICAM/FM (AM) mode, there are three different audio channels available: NICAM A, NICAM B, and FM/AM-mono. NICAM A and B may belong either to a stereo or to a dual language transmission. Information about operation mode and about the quality of the NICAM signal can be read by the controlling software via the control bus. In the case of low quality (high bit error rate), the controlling software may decide to switch to the analogue FM/AM-mono sound. Alternatively, an automatic NICAM-FM/AM switching may be applied. 4.4.1.5 German 2-Carrier System (DUAL FM System) Since September 1981, stereo and dual sound programs have been transmitted in Germany using the 2-carrier system. Sound transmission consists of the already existing first sound carrier and a second sound carrier additionally containing an identification signal. More details of this standard are given in Tables below. For D/K very similar system is used. TV standards TV Position of sound carrier system (MHz) 5.5 / 5.7421875 B/G B/G L 5.5 / 5.85 6.5 / 5.85
Sound modulation FM Stereo FM-Mono / NICAM AM Mono / NICAM
GERMANY Scandinavia, PAL Spain SECAM-L France 30
Colour system PAL
Country
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CP-850FX Service Manual I D/K 6.0 / 6.552 6.5 / 6.2578125 D/K1 6.5 / 6.7421875 D/K2 6.5 / 5.85 D/K-NICAM FM-Mono / NICAM FM Stereo FM-Mono / NICAM PAL SECAMEast UK USSR Hungary
Architecture of MSP341x Pin connections and short description Pin No. Pin Name Type 1 NC 2 NC 3 NC 4 INT Out 5 MUTE Out 6 ADR_SEL In 7 STANDBYQ In 8 NC 9 I2C_CL In / Out 10 I2C_DA In / Out 11 NC 12 NC 13 NC 14 NC 15 NC 16 NC 17 NC 18 DVSUP 19 DVSS 20 NC 21 NC 22 NC Europe R&D
Short description Not Connected Not Connected Not Connected Interrupt out Mute out I2C bus Address select Standby ( Low-active) Not Connected I2C Clock I2C data Not Connected Not Connected Not Connected Not Connected Not Connected Not Connected Not Connected Digital power supply +5V Digital Ground Not Connected Not Connected Not Connected 31
CP-850FX Service Manual 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 NC RESETQ DACA_R DACA_L VREF2 DACM_R DACM_L NC NC NC SC2_OUT_R SC2_OUT_L VREF1 SC1_OUT_R SC1_OUT_L CAPL_A AHVSUP CAPL_M AHVSS AGNDC NC NC NC SC3_IN_L SC3_IN_R ASG2 SC2_IN_L SC2_IN_R ASG1 SC1_IN_L SC1_IN_R VREFTOP MONO_IN AVSS AVSUP ANA_IN1+ ANA_IN1NC TESTEN XTAL_IN XTAL_OUT NC Not Connected Power-On-reset Headphone out right Headphone out left Reference ground 2 high voltage part Loudspeaker out Right Loudspeaker out Left Not Connected Not Connected Not Connected Scart output 2 right Scart output 2 left Reference ground 1 high voltage part Scart output 1, right Scart output 1, left Volume capacitor AUX Analog power supply 8.0V Volume capacitor MAIN Analog ground Analog reference voltage high voltage part Not Connected Not Connected Not Connected Scart input 3 in, left Scart input 3 in, right Analog Shield Ground 2 Scart input 2 in, left Scart input 2 in, right Analog Shield Ground 1 Scart input 1 in, left Scart input 1 in, right Reference voltage IF A/D converter Mono input Analog ground Analog power supply IF input 1 IF common Not Connected Test pin Crystal oscillator Crystal oscillator Test pin
In Out Out Out Out
Out Out Out Out
In In In In In In In
In In In In Out
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CP-850FX Service Manual 4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR
4.5.1 DESCRIPTION The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF (VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals. 4.5.2 FEATURES - 5 V supply voltage; low power consumption. - Active carrier generation by FPLL principle (frequency-phase-locked-loop) for true synchronous demodulation. - Very linear video demodulation, good pulse response and excellent intermodulation figures. - VCO circuit operates at picture carrier frequency,