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THOMSON VK231PS, Техническое руководство

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THOMSON VK231PS Скачать руководство пользователя страница 109

105

YNR AND DROPOUT DETECTION

The signal that arrives at IV001 Pin 26 is sent to a switch.  The output of this switch is
connected to the input of a CCD delay circuit (IV100) and the noise reduction stage.  This
circuit delays the luminance channel by one line.  The delayed channel is reinjected at 40 of
IV001, and adjusted to the correct level by an AGC.  The delayed channel is applied to the
second input of the switch and to the second input of the noise reducer.

When a dropout is detected on the input FM signal, the detection stage forces the delayed
channel to be taken into account, which compensates for the drop.

YNR (noise reduction) is performed by a digital low-pass filter that adds the direct and delayed
channels.

OUTPUT STAGE

After non-linear de-emphasis, HF noise reduction is performed.
The luminance signal is then sent to the Y/C mixer via a sharpness stage.

The MUTE stage inserts the artificial vertical pulses, PV, in Special Effects.
The video signal is available on IV001 Output 38.

Содержание VK231PS

Страница 1: ...on Les descriptions et caract ristiques figurant sur ce document sont donn es titre d information et d ex cution r serv s pour tous les pays et non d engagement En effet soucieux de la qualit de nos p...

Страница 2: ...n Les descriptions et caract ristiques figurant sur ce document sont donn es titre d information et d ex cution r serv s pour tous les pays et non d engagement En effet soucieux de la qualit de nos pr...

Страница 3: ...R6000 CAT 1 CHASSIS VIDEO RECORDERS...

Страница 4: ......

Страница 5: ...1 CONTENTS INTRODUCTION 3 SETUP MORE 11 POWER SUPPLY 17 MECANISM 31 SERVO CONTROL 37 PROGRAMMIG OSD 51 SERVO CONTROL 61 SWITCHING 79 VIDEO PROCESSING 85...

Страница 6: ...2...

Страница 7: ...3 INTRODUCTION...

Страница 8: ...4...

Страница 9: ...27 VR8047 VK231PS VK431PS THOMSON SABA BRANDT EXPLANATION OF CHASSIS MODEL NUMBERS R Video recorder First digit Series to which device belongs in this case 6 6000 Series Second digit Brand of device 0...

Страница 10: ...MOTION OPEN ENDED RECORD PLAY AUTOMATIC AV RECORDING COLLISION MESSAGE PICTURE PEAK ADJUSTMENT SATELLITE RECEIVER CONTROL PLAY NTSC ON PAL TV Automatic channel name memory VP2750 VR8027 VK231 VP4750...

Страница 11: ...UR STANDARD PAL SECAM MESECAM PAL SECAM MESECAM PAL SECAM MESECAM AUTO CHANNEL MEMORY YES YES YES CHANNEL CLASSIFICATION NO YES YES OSD ON TV YES YES YES AUTO TIME SET NO YES YES PROGRAMMING 8 progs o...

Страница 12: ...8...

Страница 13: ...appears on the video recorder display Use the AV key to select the system SYS 1 France L standard SYS 2 Western Europe BG standard SYS 3 Eastern Europe DK standard Press A to continue After a few seco...

Страница 14: ...10...

Страница 15: ...11 SETUP MODE AND SELF DIAGNOSIS...

Страница 16: ...0 4 0 0 0 0 0 0 0 5 8 8 8 8 8 8 8 6 4 E E 4 E 4 E 7 4 4 4 0 0 0 0 8 4 4 5 4 4 4 4 9 B B B B B 4 4 10 0 0 0 0 0 0 0 11 9 9 B 9 9 1 1 12 1 1 3 1 1 1 1 13 0 8 A 0 8 0 8 14 3 3 3 3 3 B B Model R6015CE R60...

Страница 17: ...entered according to the characteristics of the device see summary table DATA ENTRY The digit to be confirmed flashes on screen Use the number keys on the remote control to make entries or changes Pr...

Страница 18: ...04 Play 11 Reverse play 12 Search Play 44 Record 84 Image pause C4 Record pause 40 Record Record pause 10 Search 5 6 7 and 8 Function in progress before error bit 0 Normal 0 0 0 0 Record 0 0 0 1 FRAM...

Страница 19: ...RROR MESSAGE DISPLAY There are two ways to do this Via Setup mode when the Service Setup page is displayed on screen press the Fast Forward key on the remote control In Stop or Standby Mode when nothi...

Страница 20: ...16...

Страница 21: ...17 POWER SUPPLY...

Страница 22: ...5 DP025 RP037 DP037 038 RP038 CP038 DP023 RP023 RP004 005 006 007 008 009 FP44 CP010 DP002 DP003 DP001 DP004 300V 4 6 5 8 3 9 1 RP028 7 RP012 DP012 DP041 DP040 RP041 RP040 CP040 SECONDARY REGULATION I...

Страница 23: ...LP050 via DP23 and RP23 LOCKING OF SWITCHING DEVICE TP20 When the voltage at the terminals of RP20 is sufficiently high TP22 conducts followed by TP23 CP23 is then connected between the base and emitt...

Страница 24: ...5 DP025 RP037 DP037 038 RP038 CP038 DP023 RP023 RP004 005 006 007 008 009 FP44 CP010 DP002 DP003 DP001 DP004 300V 4 6 5 8 3 9 1 RP028 7 RP012 DP012 DP041 DP040 RP041 RP040 CP040 SECONDARY REGULATION I...

Страница 25: ...ndaries require little energy in Stand by Mode the saturation time of TP20 tends to fall to 0 2 s frequency on the order of 200 kHz This value is too low and would affect power supply efficiency in th...

Страница 26: ...300V 4 6 5 11 8 14 7 10 9 1 RP028 3 RP012 DP012 DP041 DP040 RP041 RP040 CP040 DP033 CPO31 032 DP034 DP031 RP033 RP034 RP073 RP035 RP073 RP067 RP065 RP011 DP005 DP044 DP020 16 17 UH UH RP056 33 VE 18...

Страница 27: ...se two voltages polarise the base of TP022 CP068 allows IP050 to handle abrupt variations of 14VE motor start up SECURITY To avoid security problems a new component called Protector Module e g FP044 h...

Страница 28: ...17 UH UH RP056 33 VE 18 CP054 DP053 RP053 32 VE DP081 082 CP081 082 36 VE VM 20VE 15 14 VE 13 5VE DP067 CP064 CP066 CP067 CP065 CP064 DP064 DP066 LP066 12 DP054 DW010 CW004 RW005 5 VE ON OFF FROM PIN...

Страница 29: ...ion is enabled by Line 7 of the main menu which supplies a Level 1 to Pin 24 of the control microprocessor during the changeover to Standby Mode This saturates the two transistors The saturation of th...

Страница 30: ...E 18 CP054 DP053 RP053 30 VE DP081 082 CP081 082 36 VE VM 20VE 15 14VE 13 5VE DP067 CP064 CP066 CP067 CP065 LP064 DP064 DP066 LP066 12 13 6 VEDM 13 VECM 13 VELM RW 085 DW086 DP054 DW010 CW004 RW005 5...

Страница 31: ...age used to over supply the capstan motor for the REWIND function Pin 15 via DP064 CP064 LP064 CP065 a 14 VE voltage This voltage is used to obtain three voltages to supply power to the motors 13 6 VE...

Страница 32: ...28 140 V 120 V 0 0 9V 6 V 0 17 V 0 25 V 1 V 0 2 V 0 0 0 10 s 46 s 63 s TP20 COLLECTOR TP20 BASE TP20 EMITTER TP22 BASE 6 V 1 3 V...

Страница 33: ...nt Resistors RP004 through RP011 using a 10k resistor Power the video recorder with 12 V dc via the mains connector In this configuration the following measurements are obtained on the secondaries DP0...

Страница 34: ...30...

Страница 35: ...31 MECHANISM...

Страница 36: ...to the chassis Capstan motor Function control motor Functions of the Capstan Motor Sets the tape winding speed Drives the reel stands via a belt and a free wheel Functions of the Function Control Moto...

Страница 37: ...pe is not loaded and the cassette is ejected The tape start and tape end phototransistors and the mechanism position switch indicated whether or not a cassette is present in the device Tape start phot...

Страница 38: ...the drive axle 14 by pressing A Remove the drive axle 14 by pulling upwards Remove slide 40 as follows Remove the spring 39 Release the levers on each side of the take up reel stand from the slide tak...

Страница 39: ...rol tappet in the first cam groove from the axle Reinstall the lever 25 by inserting its tappet in the second cam groove from the axle Reinstall the slide 40 Pay attention to the tape tensioning arm r...

Страница 40: ...36...

Страница 41: ...37 SERVO CONTROL...

Страница 42: ...38...

Страница 43: ...y the static and dynamic status data These data allow the microcontroller to decide whether to execute or reject an order The servo control microcontroller controls the following via interfaces Capsta...

Страница 44: ...03 16MHz 12 VS 5 VS ON 5 V RESET AVCC2 1 2 3 1 5Vcc LT001 RT073 AVCC1 5 VD TW005 RW009 RW010 TW004 CW002 RW012 RW030 RW006 RT017 RT018 RW002 RW007 RT067 CT049 CW003 33 VE CT053 DT013 RT081 0 1F CT032...

Страница 45: ...1 Pin 14 DVCC2 Pin 64 AVCC1 Pin 45 Pin 80 of IT001 also receives a switched 5 V voltage AVCC2 This voltage is present in ON Mode only If one of the power supply tensions of IT001 is missing Diode DW00...

Страница 46: ...TIONS IR RECEPT 71 72 73 67 70 21 19 95 97 48 KEYBOARD CTL BUS CK K DATAS REMOTE CONTROL CODE IK01 C TIMER IT001 C SERVO CONTROL KEYBOARD FUNCTIONS IR RECEPT 18 19 9 12 25 26 95 97 48 KEYBOARD CTL BUS...

Страница 47: ...s present at 19 or 26 of IK01 This clock consists of 8 bit bursts The clock period is 16 s REMOTE CONTROL The remote control function code is a 12 bit serial word It arrives at 48 of IT001 It has the...

Страница 48: ...SETTE DETECT LED CASSETTE 5VE RT012 ST001 5Vpp 5Vpp 11 1 2 16 15 3 1 4 2 RT001 5VE IT003 GT001 GT002 H 0 5Vpp H 0 5Vpp CAM B CAM A 41 33 32 REG SAVE CTL HEAD CAPSTAN MOTOR MR MR CTL PULSES CAPSTAN FG...

Страница 49: ...REEL STAND POSITION SENSOR CAPSTAN SPEED SENSOR SUPPLY REEL STAND POSITION SENSOR CAPSTAN SPEED SENSOR CAPSTAN SPEED SENSOR CONTROL PULSES IT001 PINS 47 82 82 81 41 81 41 41 33 COMMENTS Monitors drum...

Страница 50: ...TART 30 TT 003 ON 5V 7 CASSETTE DETECT LED CASSETTE 5VE RT012 ST001 11 GT002 CAM B CAM A REC SAVE 12 6VE IT002 MOTOR INTERFACE 26 25 1 9 3 7 6 8 2 5 5VE M 7 0 14V 0 3 0 0 14V 9 5V 0 5V 1 5V 5V 0 STOP...

Страница 51: ...0 Function control motor rotates forwards Pins 52 and or 50 of IT001 indicate when cassette loading is complete TAPE LOADING AND POSITIONING OF MECHANISM PARTS Signals CAM A B and C tell IT001 the po...

Страница 52: ...1 9 7 5 3 20 18 16 14 12 10 8 6 4 2 1 TX352 12 6 VE LM TX351 RX353 1 Kohm RX358 1 Kohm TX350 51 23 SCART ACT 5 V 16 9 5 V CTL PULSE 33 IT001 24 ms 16 ms 2 5 2 5 NORMAL CTL PULSE 16 9 CTL PULSE N 16 9...

Страница 53: ...the duty ratio of the recording and control pulses must be altered The falling edge of the control pulses is shifted by 2 5 in alternation In Play Mode the servo control control circuit IT001 detects...

Страница 54: ...50...

Страница 55: ...51 PROGRAMMING OSD...

Страница 56: ...87 6 5 8 10 83 84 64 63 11 TUNER MODULATOR according to the version IT 004 IV001 EEPROM IR Z 39 64 71 72 33 67 70 9 10 15 32 Display Keyboard CK CK Data S K Data K S Reset Strobe SDA SDA VIDEO PROCESS...

Страница 57: ...26 of IK001 Bus I2C carries signals output from Pins 86 and 87 to the EEPROM IT004 the tuner and the modulator IT001 RESETS IK001 from Pin 55 An enable command at IT001 Pin 54 is sent to Pin 3 or 22...

Страница 58: ...K001 MCU DISPLAY CTL 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 a b c d e f g h i j k l m n o 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 49 48 47 46 45 44 43 42 41 40 39 38 37 36 UH UH 1 2 46 47 38 41...

Страница 59: ...el control keyboard d Camera video audio input socket circuit AV3 on the front panel on certain models e Satellite receiver control circuit on certain models DISPLAY The control MCU IK001 issues the d...

Страница 60: ...ower ON 14 D Vcc 1 64 D Vcc 2 57 58 60 61 30 IT 001 CP081 082 12 DP081 13 18 14 RP085 5 VE LP081 CP082 1000uF CP081 1000uF CT053 0 1F Halt 49 LP20 TW004 TW005 TW006 RT061 DT013 DP082 081 36 VE RP084 R...

Страница 61: ...ed and impose a low level on the collector of TP086 This signal is transmitted to Pin 49 of servo control microcontroller IT001 POWER GOOD or microcontroller halt 0 1 F Battery CT053 powers VCC1 Pin 1...

Страница 62: ...17 73Mhz H V from 3 IV500 AV1 AV2 FI FCB SEL 1 SEL 2 h l l l h 67 75 70 69 5V FULL SCREEN 5Vcc MIX SCREEN OSD VIDEO SYNCHRO BLUE BACKDROP 1Vcc Full Screen CHARACTERS SYNCHRO CHARACTERS 1Vcc Mix Screen...

Страница 63: ...controller IT001 supplies a signal of amplitude 1 Vpp from its Output 75 This signal consists of a blue backdrop on the 4 43 MHz PAL carrier white characters and the L T synchronisation signal This si...

Страница 64: ...60...

Страница 65: ...61 SERVO CONTROL...

Страница 66: ...ER DRUM FG PG SIGNALS GENERAT CTL DRUM START OSC IT001 SERVO QT003 SYNCHRO VM VM CAPSTAN ROT FWD REV 600Hz 7Hz 16MHz 60 61 47 100 70 53 99 41 NORMAL SPEED 758Hz SEARCH 9 6 8KHz FAST FORWARD REWIND 1 5...

Страница 67: ...ntrol track to indicate the position of Video Track 1 PLAY 1500 rpm rotation FUNCTION OF CAPSTAN SERVO CONTROL RECORDING The capstan must simply wind the tape at an exact stable speed of 2 339 cm s SP...

Страница 68: ...64...

Страница 69: ...Y SPEED SENSOR GT001 OSC 25 Hz CONTROL PULSES OSCILLATOR RESET BY SYNCHRO V POSITION SENSOR GT001 SPEED SENSOR OSCILLATOR SPEED SENSOR PAUSE CAPSTAN MOTOR STOP SEARCH F FWD F REW SPEED SENSOR OSCILLAT...

Страница 70: ...drum FG PG IV500 IT001 FLIP FLOP 25Hz RT014 015 CT014 015 VM DRUM QT003 16MHz HEAD 1 1 5Vc c SYNC H V 4V 0 2 16 15 1 2 4 3 1 RT001 5VD GT001 IT003 H H 25Hz 600Hz 25Hz 200Hz 0 4Vcc 0 5V pin15 same sig...

Страница 71: ...7 of IT001 Recording frame synch Pin 70 of IT001 GENERATION OF DRUM VM A PWM 5 Vpp signal is present on Output 100 of IT001 Its period is 24 s This signal is integrated by network RT014 CT014 and RT01...

Страница 72: ...11 14 6 10 7 8 9 600Hz 7Hz OUTPUT AMPLIFIER OUTPUT AMPLIFIER OUTPUT AMPLIFIER START OSC COUNTER DECODER CK VM SIGNAL GENERATOR CTL MOTOR DRUM MOTOR START STOP CT016 RT008 RT009 IT003 4 Vcc 10 Hz 0 1V...

Страница 73: ...Hz at 70 of IT001 It is available on Output 33 of IT001 INDEX MARKING IS The duty cycle of these control pulses is modified at the start of each recording STOP to RECORD and when the INDEX key is pre...

Страница 74: ...70 NOTES...

Страница 75: ...y IT001 Note Two magnetoresistive elements are used They react in a similar way to Hall elements These two elements are located in the same box and are mechanically positioned to supply two signals FG...

Страница 76: ...3 IT001 CTL HEAD RT043 16ms 24ms 24ms 16ms 3Vc c PB 5V 0 QT003 16 MHz TRIGGER 32 34 37 36 38 39 46 RT042 RT041 CT026 CT025 BW006 60 61 35 PEAK DETECT U REF FF REWIND E L PEAK DETECT 4V PB 1V PB 2 4V C...

Страница 77: ...signal deformation through amplifier saturation or blockage which would lead to errors in INDEX searching The voltages at the terminals of Capacitors CT025 and CT026 indicate the minimum and maximum...

Страница 78: ...es a 2 5 Vpp PWM signal with a period of 48 s After integration by RT004 CT002 this signal limits the current in the capstan motor The voltage obtained after integration is in the region of 2 4 V Duri...

Страница 79: ...every 40 ms During Track 1 and in LP Mode the level of the MF envelope is increased by the disconnection of RV187 This tracking adjustment comes into operation when A new cassette is loaded The FM env...

Страница 80: ...motor 150 ms later the capstan motor is placed in forward rotation mode for 20 ms At the end of this cycle Microcontroller IT001 seeks a control signal rising edge reference Track 1 A few milliseconds...

Страница 81: ...Play Mode tape speed is halved This function is incorporated in RECORD mode by a Standard Play Long Play switch This function is automatically incorporated in PLAY mode by counting the capstan speed...

Страница 82: ...78...

Страница 83: ...79 SWITCHING...

Страница 84: ...6 IT 001 6 9 10 3 1 2 4 5 TX 350 TX351 COMMUT 94 22 21 INSEL 1 INSEL 2 PB ON PB ON INSEL 2 INSEL 1 IN frontal AU IV001 IX 004 IX 003 28 38 V EE REC VIDEO OUT V IF 3 1 3 1 V EE PB AV1 AV2 TV020 IV401 T...

Страница 85: ...om front panel connector AV3 This circuit is controlled by servo control Microcontroller IT001 INSEL 1 21 and INSEL 2 22 An integrated circuit IX003 MM1226 handles decoder switching It is controlled b...

Страница 86: ...20 18 16 14 12 11 9 10 8 7 5 3 1 6 4 2 Audio EE REC 6 10 IX 001 IX 002 IX 002 4 3 H H L L 5 9 12 14 13 11 Audio IF Audio Front AV AV3 Audio EE PB ES TX204 TX214 AV1 AV2 ES DECODER from 27 IT001 MONIT...

Страница 87: ...witches IX001 and IX002 are created using Integrated Circuits MC14052 and MC14053 controlled via IT001 The audio switching table is identical to the video switching table The microprocessor controls I...

Страница 88: ...84...

Страница 89: ...85 VIDEO PROCESSING...

Страница 90: ...LAMP vers 4 de BV001 DETECT CHROMA TV013 EF 1 2 4 5 3 28 34 38 CV037 37 42 40 5 7 10 39 59 25 26 62 CV023 IV001 IX001 COMMUT IV100 KIL DET AV1 AV2 FI FCB 1Vcc 1 5V 4Vcc 0 35Vcc 0 3Vcc 0 5Vcc Vid o out...

Страница 91: ...38 of IV001 and impedance adapter TV020 This output is used for the control channel A 3 MHz cutoff frequency low pass filter The purpose of this filter is to eliminate the chroma component of the comp...

Страница 92: ...MF MODULAT COL ROT IT001 C 26 64 63 CV008 66 18 LV014 134 CV134 140 RV134 2 5 RV038 RV039 4 SYNC from 37 from IV001 BV001 93 89 92 to REC AMPLI DFF HASEL 5Vcc 0 3cc 0 1 6V 3 2V 5V LD VN 100mVcc CHROM...

Страница 93: ...arrives at the non linear pre emphasis circuit Pre emphasis also increases high frequency low level signals Signal Y then arrives at the main pre emphasis stage This pre emphasis amplifies high freque...

Страница 94: ...MF MODULAT COL ROT IT001 C 26 64 63 CV008 66 18 LV014 134 CV134 140 RV134 2 5 RV038 RV039 4 SYNC from 37 from IV001 BV001 93 89 92 to REC AMPLI DFF HASEL 5Vcc 0 3cc 0 1 6V 3 2V 5V LD VN 100mVcc CHROM...

Страница 95: ...ilable on IV001 Pin 18 It then goes through a high pass filter with a cutoff frequency of 1 5 MHz This filter eliminates part of the lower side band of the luminance signal to avoid any overlap with t...

Страница 96: ...om 3 IX001 LC001 CC005 MUTE ENR 11 TC009 EF E L DET CONTR logi mode CTL DET contr logi mode CTL Adj Filtres CAF 16 4 43 MHz from TV044 TC014 EF TC001 INV COL OFF 11 BC100 KIL DET 13 BC100 IC101 14 13...

Страница 97: ...cuit clips the signal thus transforming the input sinusoidal signal into a square signal This creates good conditions for entering the four way divider At the divider output the SECAM chroma signal is...

Страница 98: ...PREACC BURST CONVERT 1 5 06 BALANCE E L PAL CHROMA DETECT VCO COMPAR 8 CONVERT 2 VXO MESECAM 90 PULSE GENE BURST GATE 2 FH FH SHIFT 90 MESECAM RV015 CV032 CV 031 RV 016 CV 033 CV 061 36 76 5VS 2 27 57...

Страница 99: ...AGC stage and a band pass filter with central frequency 4 3 MHz This filter selects the PAL chrominance component The signal is then sent to the ACC stage ACC STAGE The ACC Automatic Color Control is...

Страница 100: ...REACC BURST CONVERT 1 5 06 BALANCE E L PAL CHROMA DETECT VCO COMPAR 8 CONVERT 2 VXO MESECAM 90 PULSE GENE BURST GATE 2 FH FH SHIFT 90 MESECAM RV015 CV032 CV 031 RV 016 CV 033 CV 061 36 76 5VS 2 27 57...

Страница 101: ...d the line sync time signals to increment the phase shifter The 626 953 Hz signal is applied to the first input of Converter 2 PRODUCTION OF 4 43 MHz This signal is generated by a VCO controlled by a...

Страница 102: ...PREACC BURST CONVERT 1 5 06 BALANCE E L PAL CHROMA DETECT VCO COMPAR 8 CONVERT 2 VXO MESECAM 90 PULSE GENE BURST GATE 2 FH FH SHIFT 90 MESECAM RV015 CV032 CV 031 RV 016 CV 033 CV 061 36 76 5VS 2 27 57...

Страница 103: ...is selected by a low pass filter with a cutoff frequency of 1 4 MHz The PAL chroma signal available on IV001 Pin 14 is sent to the SECAM module Resistors RC031 and RC033 set its amplitude The PAL chr...

Страница 104: ...V039 RV099 RV098 TV019 TV018 RV 032 CAG DET CAG CV037 DROP OUT DETECTOR DOUBLE LIMITOR DEMOD MAIN DESEMPHASIS L E 84 20 22 IV001 IT001 C DFFHASEL COMPAR VID ENV from PREAMP DFF HASEL VN LD BV001 0 4Vc...

Страница 105: ...issues the following signals BV001 Pin 8 Y FM and chroma signal BV001 Pin 7 comparator signal used for standard speed search and giving the level of the signal read by head pair SP1 LP2 or SP2 LP1 BV0...

Страница 106: ...V039 RV099 RV098 TV019 TV018 RV 032 CAG DET CAG CV037 DROP OUT DETECTOR DOUBLE LIMITOR DEMOD MAIN DESEMPHASIS L E 84 20 22 IV001 IT001 C DFFHASEL COMPAR VID ENV from PREAMP DFF HASEL VN LD BV001 0 4Vc...

Страница 107: ...reconstitutes the high frequencies of the luminance signal These high frequencies generated mainly by the pre emphasis peaks were strongly attenuated during the head to tape transfer To do this the l...

Страница 108: ...7 10 59 60 QV001 4 43MHz CV023 IV100 AMPLI D R YNR 39 0 35Vcc 0 3Vcc DROP OUT DETECTOR from TC005 PV 76 IT001 IV001 CLAMP 26 NL DESEMPHASIS SHARPNESS NOISE REDUCT MIX L E MUTE AMPLI to TV020 CHROMA PB...

Страница 109: ...input of the switch and to the second input of the noise reducer When a dropout is detected on the input FM signal the detection stage forces the delayed channel to be taken into account which compens...

Страница 110: ...e t tes LC001 CC005 MUTE LECT 17 E L DET CONTR logi mode CTL Adj Filtres CAF 16 4 43 MHz de TV044 TC014 EF TC001 INV COL OFF 11 BC100 KIL DET 13 BC100 IC101 14 13 12 9 10 11 15 1 2 C SYN 12 BC100 E L...

Страница 111: ...es good conditions for entering the first times two multiplier After being output from the multiplier the SECAM chroma signal is transposed to 2 14 MHz The band pass filter with central frequency 2 2...

Страница 112: ...1 36 76 5VS 2 27 57 66 COL ROT from 92 IT001 51 IV001 TV003 ES VN LD from 93 IT001 8 TV004 5VS RV223 RV007 RV005 TV002 BV001 CV030 49 CCD DELAY 1 H CCD DELAY 1 H 4 3 52 46 NAP 3 1 13 12 50 48 10 PAL N...

Страница 113: ...s filter with cutoff frequency 1 4 MHz selects the PAL chroma component ACC STAGE The ACC used for playback is the same as that used for recording A PAL chroma signal with bursts of constant amplitude...

Страница 114: ...1 36 76 5VS 2 27 57 66 COL ROT from 92 IT001 51 IV001 TV003 ES VN LD from 93 IT001 8 TV004 5VS RV223 RV007 RV005 TV002 BV001 CV030 49 CCD DELAY 1 H CCD DELAY 1 H 4 3 52 46 NAP 3 1 13 12 50 48 10 PAL N...

Страница 115: ...gnal to 40 Fh 1 8 Fh 626 953 kHz It is then sent to the phase shift circuit This stage is necessary to correct crosstalk and shifts the signal by P 2 at each line when a Track 2 is played back To do t...

Страница 116: ...1 36 76 5VS 2 27 57 66 COL ROT from 92 IT001 51 IV001 TV003 ES VN LD from 93 IT001 8 TV004 5VS RV223 RV007 RV005 TV002 BV001 CV030 49 CCD DELAY 1 H CCD DELAY 1 H 4 3 52 46 NAP 3 1 13 12 50 48 10 PAL N...

Страница 117: ...a is delayed by two lines and added to the direct channel The PAL chroma signal is available after filtering on IV001 Output 46 ME SECAM PLAYBACK ME SECAM playback is performed in a similar way to PAL...

Страница 118: ...ou have decided to store the new settings it takes some seconds to initialise the EEPROM During this time the display remains dark F SERVICE SETUP Y Type in the set dependent number 001 I 1 STOP 1 EXI...

Страница 119: ...unction is disabled 2 6 RCA Cinch 2 in 1 out Si 3 4 RCA Cinch 1 in 1 out 4 2 Start connectors Front AV 5 1 Start connector Front AV 6 6 RCA Front AV Si 7 4 RCA vfront AV 11 and 12 Special functions bi...

Страница 120: ...e der Daten erforderlich ist geben Sie bitte die folgende Ziffernfolge ein I I 1 150416 1 Diese Ziffernfolge stellt die Daten f r einen optimalen Abgleich dar und gilt f r alle Ger te 2 2 Installation...

Страница 121: ...ignal Point 2 3 1 E E level E E Oscilloscope BX008 Colour Start None bar connection l vPP board or pin 19 of SCART E E Pegel BX008 der Oszilloskop Start Check for 2 0 Vpp O l Vpp E E Anschlu Kein 2 0...

Страница 122: ...pin 617 pin 12 14 pin 15116 None keine Einstellung m glich Voltmeter Oscilloscope LP20 pin 17 2 4 2 Switching period stand by Periodendauer None Mains voltage operating range Arbeitsbereich der Betrie...

Страница 123: ...V 51 V 0 2 V berpr fen 2 6 3 Drum FF RECI Confirm 25 Hz Signal PB Oscilloscope TP BT 002 None Kopftrommel Drum FF 25 Hz Signal berpr fen Flip Flop 2 6 4 CTL Signal CTL Signal PB REC PB REC Oscillosco...

Страница 124: ...ntrol DIF EQ AMP Amplifier DIG APC Automatic Phase Control DLY AP CONT Aperture Control DOC AV Audio Video E E B EMPH Burst Emphasis EMPH B DEEMPH Burst Deemphasis ENV BG Burst Gate EP BID Burst Ident...

Страница 125: ...IF Phase Locked Loop Phase Switch Pseudo Vertical Synch Pulse Width Modulation Record Record Chroma Rewind Reverse SCL SDA SEC SU REEL SMPS SP SS SW TU REEL TMB VCA v c o VCR VD VE V_ENV V_IF VS VM VM...

Страница 126: ...071 2K7 RI043 15K RI006 4K7 RI042 15K RI070 22n CI020 47R RI025 22u CI028 330R RI056 10n CI045 4K7 RI040 22n CI011 1K RI021 2u2 CI024 22R RI023 5p6 CI002 15K RI005 10R RI001 4K7 RI003 SFS5 5MHz QI070...

Страница 127: ...0 0 TI020 E 0 3 0 3 0 3 B 1 1 1 1 1 1 C 4 9 4 9 4 9 TI040 E 0 0 0 B 2 3 2 3 2 3 C 0 0 0 TI045 E 0 0 0 B 0 2 0 1 0 C 2 3 2 3 2 3 TI050 E 0 0 0 B 0 1 0 1 0 1 C 3 5 3 5 3 5 TI055 E 0 1 3 0 B 0 2 0 C 4 9...

Страница 128: ...V125 JV066 270u LV014 JV074 2k2 RV136 JV119 JV049 JV123 22u LV070 0R RV951 JV164 JV150 JV149 JV132 RV943 4k7 RV506 JV001 JV107 JV108 JV166 JV009 68k RV098 JV115 JV113 JV135 JV068 JV004 JV170 JV056 JV0...

Страница 129: ...5 5 3 2 5 2 5 2 5 4 NC NC NC 5 2 3 2 3 2 3 6 NC NC NC 7 1 5 1 5 1 5 8 8 9 8 9 8 9 9 2 2 2 2 2 2 10 0 9 0 9 0 9 11 0 0 0 12 0 4 0 4 0 4 13 1 9 1 9 1 9 14 0 0 0 IV401 1 0 0 0 2 0 4 0 4 0 4 3 2 5 2 5 2...

Страница 130: ...7 JT222 JT022 JT256 JT087 JT021 JT236 JT026 JT032 JT058 JT091 0R RT095 0R RT094 10k RT096 BC858 B TT013 470R RT067 2k2 RT069 100R RT068 3u3 LT001 390R RT167 ZDP5 1 2 DT067 JT265 JT208 JT300 JT009 JT01...

Страница 131: ...2 80 0 5 2 5 2 81 5 3 82 5 3 83 0 5 4 8 4 8 84 0 5 4 8 4 8 85 0 0 0 86 4 6 5 2 5 2 87 4 8 5 2 5 2 88 0 1 0 1 0 1 89 0 2 9 2 9 90 0 0 0 91 0 0 0 92 0 93 0 0 1 0 1 94 0 4 9 0 95 0 0 0 96 4 1 4 97 5 3 5...

Страница 132: ...3 2 1 A B C D E F G H J K L 8 7 6 5 4 3 2 1 I Main P C B components side Circuit imprim de la platine principale c t composants Hauptleiterplatte Best ckungsseite Piastra principale lato componenti P...

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