Technicolor - Thomson ICC19 Principles And Maintenance Download Page 41 | Manualshive

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38

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9

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LP020

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RP050

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100

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DP051

7809

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self power supply

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Safeties

3

Info.

I TP060

RP065

CENTRE DE

FORMATION TECHNIQUE

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Summary of Contents for ICC19

Page 1: ...ays Sämtliche Urheberrechte an diesen Texten und Zeichnungen stehen uns zu Nachdrucke Vervielfältigungen auch auszugsweise nur mit unserer vorherigen Zustimmung zulässig Alle Rechte vorbehalten I diritti di riproduzione di traduzione e esecuzione sono riservati per tutti i paesi Derechos de reproduccion de traduccion de adaptacion y de ejecucion reservados para todos lospaises ICC19 CHASSIS TELEVI...

Page 2: ...2 MENUS NAVILIGHT ...

Page 3: ......

Page 4: ...NFORMATION 3 MANAGEMENT 5 POWER SUPPLY 23 TIME BASES 57 HIGH FREQUENCIES MEDIUM FREQUENCY 73 SWITCHING 79 50 HZ VIDEO 89 100 HZ VIDEO 103 VIDEOTEXT AND OSD 125 RGB AMPLIFIERS 129 AUDIO PROCESSING 133 DOLBY PROLOGIC 139 1 ...

Page 5: ...2 ...

Page 6: ...3 GENERAL INFORMATION ...

Page 7: ...4 ...

Page 8: ...PPLY AND OPERATIONAL SIGNALS DATA MANAGEMENT CONTROLS RMICROCONTROLLER EPROM COMMUNICATION BUSES BUS EXPANDER OTHER CONTROLS SWITCH ON PROCEDURE FRONT PANEL LED CONTROL OFF ON TIMING DIAGRAM ERROR CODES CENTRE DE FORMATION TECHNIQUE 5 5 ...

Page 9: ...P130 DP133 CP130 CP141 DP134 IP140 REGULATOR 5V CP142 5V IR001 ST90R92 TDA8139 CR009 CR010 QR001 27MHZ 46 48 9 6 3 49 23 RP147 40ms 1 MC7812 LP020 17 18 13V L VCC RESET 3v 1 2 3 RESET CENTRE DE FORMATION TECHNIQUE ...

Page 10: ...hen they are On the 13 V LINE supply takes over from the 10VSTBY CLOCK A 27 MHz QR001 quartz stabilises the system clock of the IR001 microcontroller Pins 46 and 48 RESET CP142 Pin 3 of the IP140 is the Reset capacitor When the voltage at Pin 9 of the IP140 has reached 5 V and after a delay of a few milliseconds given by CP142 Pin 6 of the IP140 goes from 0 to 5 V Pin 49 of IR001 receives this Res...

Page 11: ...M IR002 256 Ko 4 Ko Expander RAM REGISTRES TIMER SAFETY Bus µp QR001 M RESET POWER FAIL Alim VIDEOTEXT DEFLECTION VIDEO MATRIX PIP MODULE DOLBY SOUND TUNER CCT5000 CHROMA 1H 2H PSI 2H MEGATEXT VIDEO MODULE 100HZ MODULE 27MHZ MARK E TING Data Addresses DS 46 48 23 51 53 43 42 44 45 62 52 54 27 40 41 49 55 28 63 64 65 25 39 29 33 32 31 34 VIDEO ADJUSTMENT CENTRE DE FORMATION TECHNIQUE ...

Page 12: ... the line and frame time base circuits audio and video switching and settings including the USYST voltage In conjunction with the tuner frequency synthesis the I2C2 bus controls video processing and the 100 Hz digital converter It also controls an 8 bit IR004 universal register EXPANDER which increases the number of control ports The M3L bus is intended for the TELETEXT module MEGATEXT version The...

Page 13: ... 58 59 60 53 VOL VOL PROG PROG INSTALL EXIT MENU MUTE INFO RR 039 RR 040 RR 038 RR037 RR045 RR032 RR033 RR034 RR035 RR044 5VSTBY 5VSTBY RIR IR001 KEY OUT KEY IN RR924 OPTION 35 36 37 38 CENTRE DE FORMATION TECHNIQUE ...

Page 14: ...s are present on these outputs when idle During the initialisation phase Line C Pin 36 is connected to the input and analysed In this way an option prediction determined by Resistor RR924 can be read The four diodes protect the IR001 circuit inputs REMOTE CONTROL UNIT LRemote control function codes 12 bits arrive at Pin 53 of IR001 They consist of the following Four address bits One call bit Seven...

Page 15: ...04 BS01 BS00 15 bits 8 bits A0 A14 D0 à D7 15 à 22 25 24 Data strobe line DS 16 17 à 21 5VSTBY 1 32 14 13 3 2 30 31 57 56 1 à12 et 66 à 68 4 à 12 23 25 à 29 13 à15 IR002 EPROM IR001 µ C CENTRE DE FORMATION TECHNIQUE ...

Page 16: ...00 through BS05 swap the read only memory for a selection of 16 pages compatible with the use of an 8 Mbit memory capacity i e 1024 KB DATA Data comprising eight bits labelled D0 through D7 are sent via the data bus To prevent any conflict of addresses with the microcontroller internal RAM an enable line called data strobe is activated in the low state when the microcontroller communicates with it...

Page 17: ...3L DA M3L ENAB 63 64 65 32 31 34 33 29 BE STROBE 2 SDA SCL SDA SCL RR055 RR056 5V 5VSTBY RR052 RR053 IR001 1 11 8 14 6 3 12 13 16 15 5V BG_INFO L1_INFO I_INFO IIC2 IIC1 DEGAUSS NORM TUNER VIDEO MODULE PERITEL AUDIO IV001 8 7 5 6 VIDEOTEXT TR095 µc PIP MEGATEXT RR 012 CENTRE DE FORMATION TECHNIQUE ...

Page 18: ...ext Module BUS EXPANDER Integrated Circuit IR004 MC14094 is an 8 bit serial parallel register that extends the interface capacity of the microcontroller It is equipped with a de serialiser register and an output register Its BE STROBE Pin 1 has the function of transferring a service byte to its outputs Pin 6 NORM is used via Transistor TR095 by Integrated Circuit FI II050 Pin 11 DEGAUSS According ...

Page 19: ...45 62 41 27 42 IR01 TV_OFF RR910 TR102 RR103 MUTE CENTER MARK_E_TING MUTE LDR RR042 RR043 13V L sensor AV2 8 AV1 8 A D A D A D FB_DET SAT_0N AFC DR091 A D ZOOM E FIELD PWM A D µC SAFE C MUTE DR090 CENTRE DE FORMATION TECHNIQUE ...

Page 20: ...ol It operates in Automatic Programming and Manual Search Modes Pin 43 informs an analogue to digital converter This is used to regulate the contrast according to the ambient lighting Pins 44 and 45 receive slow switching from SCART sockets AV1 and AV2 They are used to recognise the formats of received images 4 3 and 16 9 Pin 52 mutes the audio amplifiers It is active at low level and is present e...

Page 21: ...DATA CLK 43 I CUT 38 17 37 25 CV246 DR104 9 1V RR010 HORIZONTAL DEFLECTION TR002 RR031 RR036 RR29 51 REGULATION CTL VERTICAL CTL Cde LIGNE 5vSTBY 10VSTBY UVERT 8V IV001 STV2161 STV2162 ST90R92 13v 45 34 RV091 RR030 5V REG RP148 RP149 RP142 RP143 TP146 5V 5 8V de DP140 2 4 8 7 IP140 DP134 CENTRE DE FORMATION TECHNIQUE ...

Page 22: ... gradually powered up by the slow starting capacitor CV246 Pin 17 of IV001 The rising of the line 13 V transmitted by DR104 confirms that the On function is fully established 5V at Pine 65 of IR001 This 13VL also makes it possible to obtain a 5V via the IP140 regulator The ICUT signal Pin 43 of IV001 indicates when the tube is warmed up and frees the analogue controls The image and sound appear Or...

Page 23: ...TBY 5v STBY 400ms Reset IIC1 TV OFF H DRIVE 13v 5V IIC2 M3L Interrupt Power fail M Reset Mute C Mute I CUT OFF to ON CHRONOGRAM 0V 1 2V 100ms RED ORANGE GREEN OFF 1s H DRIVE ON 4s 100ms 0 5ms PB NVM CENTRE DE FORMATION TECHNIQUE ...

Page 24: ...e vert vert orange pause rouge éteint 0 7 sec 1 7 sec 2 4 3 4 0 7 sec 0 7 sec 1 7 sec 1 7 sec 250ms 250ms 0 7 sec 1 7 sec pause éteint rouge CODE ERROR CODE ERROR ACR MSP3410 26 NO WARM TUBE SIGNAL AFTER 15 s 11 ACR MSP3400 27 STV216X DETECTED A CASE OF PROTECTION 3 TIMES 12 ACR DSP56004 28 MEGATEXT INTERFACE NOT RESPONDING 13 ACR STV2161 2162 29 MEGATEXT DRAM IS DEFECTIVE 14 ACR STV2151ou TDA9143...

Page 25: ...22 22 CENTRE DE FORMATION TECHNIQUE ...

Page 26: ...SUPPLY CONTENTS INTRODUCTION PRINCIPLE CHARACTERISTICS LP020 POWER SUPPLY INTEGRATED CIRCUIT TEA2261 SECONDARY REGULATION POWER SUPPLY INTERLOCKS MAINS POWER CUT DETECTION CENTRE DE FORMATION TECHNIQUE 23 23 ...

Page 27: ...flection safeties RL81 82 RP054 CP 054 US 10V STBY GNDS CP063 RP025 IP130 DP133 13V U VERT RL80 US US 5V IV001 STV2161 STV2162 SMPS SMPS CP020 Regulation Deflection safeties 10V Reg PFC PFC 50Hz Contr 100Hz TP025 RP060 RP059 TP027 Option RP065 RP020 CP062 CP064 DP053 DP050 DP 052 12 DP 134 TP161 DP140 IP140 5V STBY 5V TDA8139 MIS BREATHING U13 DP60 CENTRE DE FORMATION TECHNIQUE ...

Page 28: ... a signal indicating the overall consumption of the secondaries picked up on a primary winding is used In Steady State Mode the line frequency synchronises the signal Regulation then takes place at the secondary and is based on stabilising the voltage USYS applied to the line time base CHARACTERISTICS TMains voltage 190 to 264 volts Secondary voltages U SYS 127 to 136 V for 50 Hz chassis 130 to 14...

Page 29: ... Im Um Uc R RL C 220VAC Um Uc Im Narrow current pulse including a high harmonic level Im Um R C1 220VAC Um Ub Im C2 L1 D1 n 2n T1 Ua Um ID1 D1 conduction level when T1 is ON With PFC Without PFC a b c WITHOUT PFC CIRCUIT WITH PFC CIRCUIT ...

Page 30: ...ndenser C1 is inserted between the diode bridge and filter condenser C2 C1 C2 It decouples the dc voltage between Condenser C2 charged to 300 V and the diode bridge providing full wave rectification of the mains voltage An intermediate tap on the primary winding divides the winding so that when Transistor T1 conducts the voltage at Point C is about 2 3 the value of the voltage at Point B This as s...

Page 31: ...28 28 DP018 DP10 DP12 DP13 DP11 DP16 DP019 CP11 4n7 CP12 4n7 CP15 470n CP13 CP018 1µ CP017 470p CP020 CP019 470p LP019 LP15 RP10 2R7 MIS CHASSIS TP060 3 4 1 2 5 6 n 2n CENTRE DE FORMATION TECHNIQUE ...

Page 32: ...s pollution generated by the line frequency switching of Diode DP019 D1 Diode DP16 protects CP15 C1 against voltage spikes on the mains Diode DP018 limits the collector overvoltage of TP060 T1 when diode DP019 is blocked NOTES CENTRE DE FORMATION TECHNIQUE 29 29 ...

Page 33: ...ULATION ORDER 4 5 µA 10 µA 0 15 V POSITIVE SW NEGATIVE SW TC 0 9 V 0 6 V 2 6 V OVER VOLTAGE PROTECTION LIMITATION I INNER POLARISATION INNER REF 2 5 V SAFETY Vcc 15 7 V OVER VOLTAGE 9 11 10 1 2 8 3 4 13 5 12 GND 6 AMPLIFIER ERROR 1 2 β α 3 7 16 Vcc 15 V 14 2 5v CENTRE DE FORMATION TECHNIQUE ...

Page 34: ... Pulse width modulator PWM Gradual start circuit Transformer degaussing control Current limiting threshold detection Logic management of limits and interlocks Output stage for direct drive of a bipolar power transistor Because of the automatic switching of SALVES Mode in the event of low consumption this circuit handles a wide range of regulation tasks from a few watts to values in the region of 2...

Page 35: ...032 360k RP025 33k CP020 RP029 100k RP055 15R CP055 4n7 CP056 47µ DP050 TP060 CP052 10µ 14 7809 16 Vcc REF 2 5 V 15 7 V I SIGNAL RESET Vcc 5V5 REGUL Vcc INT 5 V R1 R2 PROTECTION OVER VOLTAGE Vcc Vcc MAX RESET Safety V REF 2 5 V Vcc OFF Vcc INT 5 V 10v3 7v4 15 Output power supply IP060 TEA2261 RP054 CENTRE DE FORMATION TECHNIQUE ...

Page 36: ... and sets its maximum current The circuit supplies several voltages and service signals according to changes in the direct current voltage at Pin 16 As soon as Vdc reaches approximately 4V5 an internal reference of 2V5 is generated For Vdc 5V5 a RESET pulse is produced When Vdc reaches 10V3 Vdc start enabling of an internal power supply Vdc int 5 V This stabilised voltage allows the circuit to per...

Page 37: ... 100k RP025 33k TP026 TP025 DP027 CP020 RP029 100k RP055 15R CP055 4n7 CP056 47µ DP050 TP060 CP052 10µ 7809 16 14 IP060 TEA2261 DP034 DP028 5V1 12V IP050 RECTIFIER PFC FILTER 220VAC 300VDC DP052 DP053 DP051 CP054 470µ RP030 à RP032 360k RP025 33k DP054 CP020 RP029 100k RP055 15R RP035 DP035 CP055 4n7 CP056 47µ TP060 CP052 10µ 14 16 7809 IP060 TEA2261 POWER STANBY SWITCHING LOW POWER SWITCHING ...

Page 38: ...050 and saturates Transistor TP026 With its gate then earthed the thyristor de energises the next time the mains alternation is inverted This layout reduces the consumption by 0 7 W LOW POWER SWITCH A low power switch can be connected in series with Resistor RP025 to replace the classic mains switch In operation this switch connects RP025 via Resistor RP55 to Pin 16 of IP60 In Off position this sw...

Page 39: ...COMPARATOR 2 K Q3 R1 R2 R3 3V33 1V66 LP020 8 10 DP050 RP050 10R CP051 100µF RP059 47k Q1 DP060 IP050 DP051 CP052 10µ 7809 R4 CP063 4n7 8 RP060 270k Safety CP062 10µ RP062 1M TP027 Primary regulation Self power supply IP060 TEA2261 CENTRE DE FORMATION TECHNIQUE ...

Page 40: ...ecause the secondary voltages are low the time required to restore the energy is liable to exceed the nominal period of the oscillator The oscillator therefore starts up with a low frequency approx 5 kHz due to components RP061 and CP060 only Diode DP060 is blocked With the increase in voltage at the IP050 output Diode DP060 begins to conduct and the current determined by RP060 gradually contribut...

Page 41: ...LIFIER 7 V REF 2 5V 9 RP066 4k22 RP064 1k V REF 2 5 x 0 9 2 25 V SPECIAL SOFT 1 0 9 14 TA IS Output Safeties 300V T onmin 1µs OSC TP060 8 DP050 RP050 10R CP051 100µF IP050 DP051 7809 CP064 22n Standby self power supply DP061 15 Output power supply Safeties 3 Info I TP060 RP065 CENTRE DE FORMATION TECHNIQUE ...

Page 42: ...gical AND operator between these two signals produces the narrowest strobe pulse When switching on and at the beginning of each burst a soft start is ensured by controlling the internal voltage and therefore the width of signal b from T1 to T2 Capacitor CP061 Pin 9 is charged by an internal generator producing a current of 180 µA There is no signal at the IC output At T2 the voltage at the termina...

Page 43: ...40 40 IP060 TEA2261 2 LP070 RP068 1k Primary regulator Soft Vcc int Secondary regulator 0V9 150mV Vcc ext 1 500R RP050 10R RP069 22k DP050 LP020 CP068 470p 8 CENTRE DE FORMATION TECHNIQUE ...

Page 44: ...ergy restoration phase and of the interlock being triggered by a current peak To avoid this problem a signal taken from Winding 8 9 and applied to Pin 1 warns the circuit of this critical phase All commands are then blocked The first negative front corresponding to the end of energy restoration transformer degaussing enables any new primary or secondary commands NOTES CENTRE DE FORMATION TECHNIQUE...

Page 45: ...V7 Vref 2V5 10V3 7V4 5V int 3 16 RP020 0R1 TP060 Vcc Max RESET CP062 10µ RP062 1M RP059 47k RP060 270k RP067 1k RP063 7 RP065 6 14 RESET Vcc 5V5 Vcc CP056 47µ LP020 RP025 33k 220V RP055 15R 8 DP050 IP050 DP053 7809 TP027 10 DP052 CP054 470µ OSC CP060 1n 10 DP060 Primary regulation RP066 CENTRE DE FORMATION TECHNIQUE ...

Page 46: ...2ND THRESHOLD INTERLOCK In the event of a major overload short circuit on USYS a second threshold is reached 0V9 Control of TP060 is permanently disabled A main reset is then necessary to re start the circuit V Pin 16 5V5 VOLTAGE INTERLOCK A voltage above 15V7 on Pin 16 blocks TP060 A main reset is then necessary to re start the circuit V Pin 16 5V5 SPECIFIC FEATURES OF ICC19 CHASSIS Because the p...

Page 47: ...P050 0R10 DP040 2V7 RP041 47R RP042 4k7 CP041 1n CP040 470µ RP040 22R LP040 LP042 DP041 BAT42 CP042 1n RP029 100k RP028 RP030 à 32 460k LP020 IP060 TEA2261 14 15 12 13 DP022 FUF 4005 RP022 100R 3 4 5 6 18 USYS DP110 DP112 MUR 1100E CP110 100µ DP113 CP112 LP 112 RP112 1k2 RP54 ...

Page 48: ... RP032 pre charge CP040 as soon as power is switched on to ensure an adequate reverse locking current during the start up phase and at the beginning of each burst Self induction coil LP040 sets the dl dt of the control current reversal The circuit DP022 CP023 RP022 slows the rise in collector voltage of TP060 when it is blocked to ensure minimum dissipation through switching and to limit the overv...

Page 49: ... 137 3V 26 0V 14 1V 14 0V 7 52V 134 2V 22 7V 18 6V 18 4V 5 95V 134 2V 23 5V 13 5V 13 6V 6 05V 131 2V 26 5V 16 8V 15 1V 7 87V 137 2V 26 3V 12 7V 12 8V 7 68V 133 9V 22 8V 15 2V 15 2V 5 8V 133 9V 23 4V 11 1V 11 5V 5 78V White screen maxi sound 50Hz stéréo 50Hz dolby 100Hz stéréo 100Hz dolby 85 3V 15 1V 10 5V 10 3V 6 7V 91 6V 14 9V 7 7V 7 6V 8 5V 108 2V 13 9V 11 1V 11 0V 6 8V 104 4V 13 9V 8 9V 9 0V 7 ...

Page 50: ...er supply voltage Also applied to the regulator circuit IP30 and causes the polarisation of the base of TV002 IV001 power supply U7V voltage supplying the switched 5 V In Standby Mode the 10VSTBY is produced by Regulator IP130 and Diode DP133 In Steady State the 13 V from the EHT takes over via Diode DP134 The switched 5 V is obtained at Pin 8 of IP140 switched by voltage U13 Pin 4 on 50 Hz stereo...

Page 51: ...TDA8139 DP140 CP130 2200µF CP131 10µF CP141 2 2µF 1 2 9 7 8 4 VI1 VI2 VO1 VO2 5V Reg Prog Dis 12V RP148 18 k RP149 4k7 CP144 10µF RP143 2k32 RP142 2k21 CL045 470µF CL042 1000µF LL045 LL008 THT 10 12 RL040 0R27 ZL041 CP140 4700µF JP911 JP910 12 13 17 18 5 V STBY 5 V 10 V STBY 13V U13 U VERT CENTRE DE FORMATION TECHNIQUE ...

Page 52: ... 8 4 VI2 VO2 Reg Prog Dis RP148 18 k RP149 4k7 RP143 2k32 RP142 2k21 CL045 470µF CL042 1000µF LL045 LL008 THT 10 12 RL040 0R27 ZL041 CP140 4700µF CP146 10µF TP146 VOLTAGE ELABORATION 5 V 50 Hz Dolby 100 Hz VERSION 5 V 13V U13 CENTRE DE FORMATION TECHNIQUE ...

Page 53: ...STV2161 2162 37 31 VCC1 IR001 ST90R92 VCC1 RP162 2k2 RP068 1k RP138 10k RP139 82k RV242 1k CV243 470p CV242 470n CV241 100p RP161 330R SMPS CV246 220n 18 19 31 32 17 CSOFT SMPS IN Régulation Sécurité BREATHING 22 28 33 RV213 CL030 038 DP160 RP163 2k2 Sécurités Alimentation Bases de temps H REF I2C1 13 DP140 TP162 fl CENTRE DE FORMATION TECHNIQUE ...

Page 54: ...ng transformer LP070 via Transistor TP161 A soft start circuit is associated with the production of the command strobe signal CV246 Pin 17 when power is applied to circuit IV001 it is charged to 5V5 in 900 ms The network RV242 CV242 CV243 limits the pass band of the entire regulating loop to 300 Hz On 100 Hz chassis Transistor TP162 controls transformer degaussing In the event of irregularities on...

Page 55: ...67 RP065 RP063 DP050 RP050 10R 10V STBY DP108 RP172 10k RP191 4k7 RP192 100k RP190 5k6 DP178 DP190 DP179 RP177 RP176 4k7 IV001 RP171 22k RP193 4k7 RP170 10k RP175 1K CP171 22µ RP129 10k RP127 100k RP128 2k2 RP130 0R10 CP126 100µ RP126 2k2 DP 126 JL004 100R RP179 22k CP179 47µ DP175 3 2 1 IR001 TR102 RR910 RR103 1k RV 003 RV001 RP160 RP162 40 28 12 22 44 23 24 37 SMPS OUT 2 8 4 RP149 RP148 RP161 TV...

Page 56: ...load or short circuit on US causes TP190 and TP170 to conduct This forces the breathing interlock input of the regulation and sweep circuit IV001 to be triggered by a low level An overload or short circuit on US causes DP190 and TP170 to conduct and triggers the IV001 interlock In the event that external speakers with too low an impedance value are connected Dolby versions or when incidents occur ...

Page 57: ... 220n RP159 330k RP150 10k RP151 12k RP152 2k2 RP165 120k RP164 100k RP167 10k RP145 10k DP130 TP145 TP167 TR105 TR106 TP166 TP150 TP152 TR091 RP166 1k RP144 1k RR107 1k8 RR106 470 RP144 1k8 RR098 22k RR099 10k RR084 1k RR085 100R RR089 100R RR091 4k7 POWER_FAIL RR093 4k7 CR085 10n DR 090 DR091 55 54 52 IR001 CP150 22n CR092 100p INT MUTE MUTE C M RESET MUTE C MUTE CENTRE DE FORMATION TECHNIQUE ...

Page 58: ...omenon occurs in ON Mode The negative voltage rectified in Forward Mode by Diodes DP151 152 is an image of the mains voltage It blocks TP152 in ON Mode TP150 and TP145 are blocked TP167 is saturated and the POWER FAIL line has a low level When the mains falls below 160 Vac TP152 TP150 and TP145 conduct TP167 generates a rising edge on the POWER FAIL line by blocking off In Standby Mode because vol...

Page 59: ...56 56 CENTRE DE FORMATION TECHNIQUE ...

Page 60: ...BASES CONTENTS INTRODUCTION PRODUCTION OF H DRIVE COMMAND IN STV2161 SPECIFIC FEATURES OF STV2162 DRIVER STAGE EHT AND LINE POWER EW STAGE FRAME SWEEP TIME BASE INTERLOCKS CENTRE DE FORMATION TECHNIQUE 57 57 ...

Page 61: ... TEA 6415C 15 RX950 RX951 TX950 Chroma Module RV202 150R RV203 150R CV201 680n RV201 180R 16 TV002 TIP122 RV001 110k 24 22 23 44 12 RV003 24k9 21 CV207 4n7 CV206 1µ CV246 220n CV213 47p CL211 470p CL039 27n CL038 27n CL030 1n9 CV216 470p CV222 22n RV216 330R JL004 100R RV213 4k7 RL214 2k7 RV206 18k TP170 TL062 Power supply and deflection safeties ON OFF 18 19 33 17 H FLY 38 28 TL030 V SYNC IV01 13...

Page 62: ... Resistor RV003 Pin 23 Its free frequency can be adjusted in 125 Hz steps in the 15 500 15 750 Hz range according to operating mode The video signal is applied to the synchronisation separation stage by Pin 16 SYNC IN The resulting signal is brought to the first phase detector which generates an error voltage on filter RV206 CV206 CV207 Pin 21 A HORIZONTAL LOGIC stage then divides the frequency fr...

Page 63: ... RV003 24k9 21 CV207 220p CV206 220n CV246 220n CV213 47p CL211 470p CL039 27n CL038 27n CL030 1n9 CV216 470p CV222 22n RV216 330R JL004 100R RV213 4k7 RL214 2k7 RV206 270k TP170 TL062 Power supply and deflection safeties ON OFF 18 19 33 17 H FLY 38 28 TL030 V SYNC 8 7 SLPF Start oscillator HDFL VDFL LDFL Frame BV011 10 8 9 Up Convertor CV247 220p 13 Horizontal counter IV01 13V LI DL134 STV 2162 C...

Page 64: ...with amplitude 2Vpp The STV2162 incorporates an oscillator whose frequency depends on a reference current RV003 Pin 23 and regulation handled by Operating Mode free frequency This oscillator starts up the line time base and is then synchronised by the HDFL pulses After division a counter then supplies a frequency of 31250 Hz which is applied to the second phase detector This operates in exactly th...

Page 65: ... RL003 2k2 RL004 RL013 RL015 CV216 470p CL002 560p CL001 1000µ CL008 4n7 CL004 10µ CL005 CL003 220p TL001 BC847 TL005 MPS750 DL003 DL004 LL006 3µ3 CL006 27p TL004 MPSW01R RL014 RL016 RL017 RL018 TL030 LL001 only for chassis 50Hz DL001 CENTRE DE FORMATION TECHNIQUE ...

Page 66: ...01 is switched by this signal and controls push pull TL004 TL005 The differences between the 100 Hz chassis and the 50 Hz chassis are the value of Resistor RL013 10R for the 50 Hz version and 4R7 for the 100 Hz version and the driver transformer which has a lower leakage inductance for the 100 Hz model basic reverse current of TL030 goes to 4 A 2 A for the 50 Hz model In the event of a collector e...

Page 67: ... RL043 2R2 CL043 CL044 100µ RL045 100k 13V U VFB LL046 RL046 RL048 CL146 CL046 10µ U Vidéo LL047 RL047 47R 1 DL050 DL052 DL051 BREATHING BEAM INFO PKS RL051 RL052 RL053 RL044 RL050 LL008 CL052 10n LL084 CL084 RL084 LL037 RL124 à RL127 RL134 à RL137 CL037 CL034 LL034 CL036 DL 034 DL 036 RL037 1k safety circuit CL030 CL057 100n RL155 47R E W 4 6 VCC 1 RL092 DL092 7 8 TEMP ABL CENTRE DE FORMATION TEC...

Page 68: ...re picked up on the secondaries of LL008 Pins 2 and 3 a 27 Vpp pulse to heat up the filament for 50 Hz tubes or a 45 Vpp pulse for 100 Hz tubes Pin 5 500 Vpp negative trigger pulse which supplies a voltage U VIDEO 200 V after rectification in Forward Mode DL046 Pin 9 400 Vpp negative trigger pulse which supplies a voltage UVFB 52 V after rectification in Forward Mode DL043 Pin 10 120 Vpp negative ...

Page 69: ...R E W VERTICAL SIGNAL GENERATOR U SYS LL008 RL052 RL053 RL044 RL050 1 DL023 CL023 RL023 RL025 470R RL026 30 32 CL028 RL027 470R CL027 1n EW BACK EW DRIVE RL129 CL029 LL029 DL030 DL032 CL031 CL032 BEAM INFO IV001 CENTRE DE FORMATION TECHNIQUE ...

Page 70: ...in the form of a current on Pin 32 This is applied to the Darlington transistor It takes energy from the modulator via self induction coil LL029 The general negative feedback and the operating point are supplied by network RL026 RL025 RL020 RL024 and VCC1 They correspond to the EW BACK signal on Pin 30 On the 50 Hz chassis there is also a dynamic pulse width correction performed by network DL023 C...

Page 71: ...3 5 4 1 7 DF033 DF031 CF027 100n U VFB DF011 RF011 1R5 RF020 RF036 1k DF028 CF028 1µ CF011 470n CF021 100n CF015 2200µ 13V IF001 TDA8177F SENSEP SENSEM VERTICAL SIGNAL GENERATOR PLL SOFT H SOFT V CV234 33n 26 27 29 C VERT DEFLECTION AND POWER SUPPLY SAFETIES 28 SAFETY bus I2C IV001 JL004 100R RV222 270k CV222 3n3 U SYS LL008 RL052 RL053 RL044 RL050 1 TP170 RL051 BREATHING CENTRE DE FORMATION TECHN...

Page 72: ...E DR signal on Pin 25 It receives the ac negative feedback SENSEP Pin 26 and dc negative feedback SENSEM Pin 27 signals Its operating point is set by an internal dc framing voltage which is adjustable in Operating Mode Circuit TDA8177F receives the previous command on its Pin 1 It is polarised by bridge RF007 RF003 and Zener DF007 Voltages UVERT Pins 2 and 6 and UVFB Pin 3 power this circuit The o...

Page 73: ...EG DF028 RF036 1k CF028 1µ DL071 11 24 33V RL071 43k RL171 13k RL072 1k DL072 RL070 27k DL070 BEAM_INFO RL149 1k RL146 470R RL147 2k2 DL147 DL148 11 CL148 470n CL073 1µ RL051 BREATHING VCC 1 RV221 120k RV223 270k DL221 RV222 270k CV222 3n3 TL062 RL056 10k RL160 1k RL058 10k5 RL063 5k23 CL063 1n 2 3 CL061 1n RL065 100R RL067 68 69 3 3k3 RL066 DL066 47V 5V DP178 RL055 1k RL054 8k2 DL060 3V3 RL064 10...

Page 74: ...r Diode DL066 and TL063 Line deflector disconnection This is detected through a decrease in voltage UPROT 11 on LL008 DL157 50 Hz chassis CL030 38 39 DL157 100 Hz chassis and a high level at 7 on IL062 saturation of TL063 Using TR102 the microcontroller can force the interlock via the SAFE line Two time constants delay the action of TP170 CP179 RP179 and CP171 RP172 The EHT voltage image is also c...

Page 75: ...72 72 CENTRE DE FORMATION TECHNIQUE ...

Page 76: ...HIGH FREQUENCY INTERMEDIATE FREQUENCY CONTENTS CTT5000T TUNER INTERMEDIATE FREQUENCY CENTRE DE FORMATION TECHNIQUE 73 73 ...

Page 77: ...74 74 1 4 5 6 7 9 11 RH010 RH007 RH008 DH001 5V 5V CAG CL2 DA2 USYS FI From 19 to II050 From 33 34 to IR001 to TI020 From Power supply 33V T U N E R CENTRE DE FORMATION TECHNIQUE ...

Page 78: ...requency bands Band 1 48 25 MHz to 112 25 MHz Band 3 119 25 MHz to 399 25 MHz Bands 4 and 5 407 25 MHz to 863 25 MHz The following table gives information about the pins of this tuner NOTES CENTRE DE FORMATION TECHNIQUE 75 75 PIN COMMENT HF AGC input CL2 IIC2 BUS DA2 5 V 33 V IF output 1 4 5 6 7 9 11 ...

Page 79: ...20 BCR141N TI040 BA782S DI001 100n CI046 82R RI039 1k8 RI038 BA782S DI041 BA782S DI051 BA782S DI002 JI928 TI070 BC848B BA782S DI070 BA782S DI071 u33 LI020 22k PI050 68R RI035 JI906 47p CH009 GND O2 O1 I2 I1 OFWK3954M FI010 GND O2 O1 I2 I1 38M9 FI015 JI901 2u2 CI061 47u CI062 22u CI031 2u2 CI054 6u8 LI053 6 5MHz QI070 FI040 FI030 4n7 CI070 BCR141N TI050 6u8 LI070 10n CI030 2k2 PI030 BCR141N TI010 B...

Page 80: ... following functions Picture IF amplification and demodulation FI030 is used FM sound and NICAM amplification IF and HF AGC The demodulated video signal is available on Output 21 of II050 It passes through the FM audio intercarrier trap FI040 5 5 and 6 5 MHz and is reinjected at 22 on II050 After amplification this video signal is output at 10 of II050 It passes through the FM audio intercarrier t...

Page 81: ...78 78 CENTRE DE FORMATION TECHNIQUE ...

Page 82: ...SWITCHING CONTENTS VIDEO SWITCHING AUDIO SWITCHING RGB SWITCHING CENTRE DE FORMATION TECHNIQUE 79 79 ...

Page 83: ...001 20 6 5 3 1 8 10 11 18 17 16 14 15 13 TX965 EF TX955 EF TX960 EF TX950 EF TX920 EF TX910 EF FI IX900 12 6 17 19 BV011 BV021 AV2 AV1 AV3 from front panel sockets sat Y V V C C Y V Y V Y V Y V C C Y V V Y V C2 C1 Y V2 Y V1 Y V to vidéo module 2 4 DA1 CL1 7 7 TX830 à TX833 8 BX803 IR LINK RX803 RX801 RX802 45 61 44 32 31 AV1 8 AV2 8 EXT LINK IR001 SCI MODULE MAIN BOARD CENTRE DE FORMATION TECHNIQU...

Page 84: ...troller IR001 indicate whether the source is 4 3 or 16 9 1 7 V V 3 V 16 9 source 3 6 V V 5 V 4 3 source The table opposite summarises the video switching CENTRE DE FORMATION TECHNIQUE 81 81 FUNCTION INPUT OUTPUT TV 20 of IX900 13 of IX900 15 of IX900 16 of IX900 18 of IX900 AV1 11 of IX900 20 of IX900 15 of IX900 16 of IX900 18 of IX900 13 of IX900 AV2 5 of IX900 13 of IX900 15 of IX900 16 of IX90...

Page 85: ...3 BS01 10 2 8 7 BS02 BA002 BA001 BS11 3 1 5 7 10 5 11 4 BS02 BA002 SIF AM AF 58 55 50 49 33 34 47 46 36 37 53 52 9 10 CL1 DA1 31 32 2 3 BA001 BS01 28 29 25 26 3 5 1 7 5 3 7 1 IS60 AMPLI IS01 ADAPT 15 13 BS02 1 3 BS03 to headphone sockets to ampli and hps BS04 IS40 G D G D D G D D D D D G G G G G SCI MODULE AUDIO MODULE MAIN BOARD CENTRE DE FORMATION TECHNIQUE ...

Page 86: ...g NOTES CENTRE DE FORMATION TECHNIQUE 83 83 FUNCTION INPUT OUTPUT TV 55 of IS40 or 55 58 of IS40 or 58 of IS40 25 26 of IS40 28 29 of IS40 33 34 of IS40 36 37 of IS40 AV1 25 26 of IS40 28 29 of IS40 33 34 of IS40 36 37 of IS40 AV2 49 50 of IS40 25 26 of IS40 28 29 of IS40 36 37 of IS40 AV3 46 47 of IS40 55 58 of IS40 25 26 of IS40 28 29 of IS40 36 37 of IS40 33 34 of IS40 52 53 of IS40 55 58 of IS...

Page 87: ...AV1 AV2 AV3 BS001 10 2 8 7 BS002 BA002 BA001 BS009 3 1 5 7 10 5 11 4 BS002 BA002 SIF AM AF 25 28 33 34 51 50 36 37 48 47 30 31 9 8 CL1 DA1 31 32 2 3 BA001 BS001 57 56 60 59 5 3 7 1 IS220 AMPLI 15 13 BS002 1 3 BS003 to headphone sockets to ampli and hps IS150 G D G D D G G D G D D G G D SCI MODULE AUDIO MODULE MAIN BOARD CENTRE DE FORMATION TECHNIQUE ...

Page 88: ...TES CENTRE DE FORMATION TECHNIQUE 85 85 FUNCTION INPUT OUTPUT TV 28 of IS150 or 28 25 of IS150 or 25 of IS150 59 60 of IS150 56 57 of IS150 50 51 of IS150 47 48 of IS150 AV1 59 60 of IS150 56 57 of IS150 50 51 of IS150 47 48 of IS150 AV2 33 34 of IS150 59 60 of IS150 56 57 of IS150 47 48 of IS150 AV3 36 37 of IS150 28 25 of IS150 59 60 of IS150 56 57 of IS150 47 48 of IS150 50 51 of IS150 30 31 of...

Page 89: ...12 10 7 9 9 8 7 6 15 21 14 13 12 20 19 18 8 44 62 TV601 RV615 9VM RV614 TV600 RV612 BV006 BV011 BX001 IV001 IV601 IR001 50Hz VERSION 100Hz VERSION VIDEO MODULE SCI MODULE MAIN BOARD R V B FB FB DET CENTRE DE FORMATION TECHNIQUE ...

Page 90: ...ction of TV600 or TV601 whose layout is equivalent to a pseudo thyristor APPLICATION Pin 16 0 TV600 TV601 blocked input Pin 62 of Microcontroller IR001 4 5 V The microcontroller interprets this as absence of fast switching Pin 16 1 5 V TV600 TV601 saturated Pin 62 of microcontroller 0 8 V The microcontroller identifies the presence of a fast switch If the fast switch disappears Pin 16 0 Pin 62 of ...

Page 91: ...88 88 CENTRE DE FORMATION TECHNIQUE ...

Page 92: ...50Hz VIDEO PROCESSING CONTENTS GENERAL INFORMATION IC001 STV2151 GROUP DELAY COMPENSATION IV001 STV2161 CENTRE DE FORMATION TECHNIQUE 89 89 ...

Page 93: ...ION RVB PROCESS SWITCHING RVB MATRIX CRT CUT OFF SERVO BEAM LIMITER BRIGHTNESS CONTRAST SATURATION IC001 IV001 24 22 V Y C 20 6 7 Y 4 3 2 42 41 40 R V B 6 to 9 RVB FB 50 46 to 48 RVB FB Y R Y B Y TC002 003 004 008 041 DELAY COMPENSATION APX CONTRAST COMPENSATION Y TRANSITION CENTRE DE FORMATION TECHNIQUE ...

Page 94: ...CAM NTSC Demodulation of colour PAL SECAM NTSC IV001 STV2161 This performs Luminance delay Improvement of R Y and B Y transitions Dematrixing of Teletext OSD SCART RGBs into Y R Y and B Y Switching of Y R Y and B Y Light contrast and saturation commands Automatic contrast compensation APX Beam lock RGB matrixing Automatic control of tube cutoffs NOTES CENTRE DE FORMATION TECHNIQUE 91 91 ...

Page 95: ...13 19 27 28 30 CVBS SVHS RC021 CC011 LC001 RC002 CC003 RC003 CC002 D CK DC001 RC024 TC001 RC010 RC011 9VREG RC007 CC012 CC013 RC001 CC05 CC004 QC001 4 43MHz QC002 3 58MHz V Y C I REF V REF ID1 ID3 8 8V 7 7V 7V 3 85V 1 1V 0 5Vc c 0 4Vcc 0 15Vcc PAL SECAM T 20ms 0 9Vcc 0 9Vcc ID2 4V SECAM 0 8Vcc PAL 70mVcc 21 CENTRE DE FORMATION TECHNIQUE ...

Page 96: ...m the regulation stage IDENTIFICATION During a colour standard search phase IC001 is configured in PAL SECAM and then NTSC successively until the standard is identified four frames each The SECAM colour standard is identified by the frequency demodulation of the subcarrier bursts The PAL NTSC colour standards are identified by the amplitude demodulation of the bursts The dc voltages obtained are m...

Page 97: ...SVHS 26 20 2 1 16 15 6 7 10 DEMOD R Y DEMOD B Y PLL 6MHz DETECTOR COLOR CONTROL D E L A Y 6 4 µ s D E L A Y 6 4 µ s CC006 CC019 CC014 CC020 CC015 RC006 RC005 SSC R Y B Y V Y to 19 BC011 to 17 BC011 to TC002 to 6 BC011 to 5 BC011 to 2 BC011 FH 0 3Vcc 4 4V 0 95Vcc 1 1Vcc 2 9V 3V 3V 2 9V 20ms 40ms 3 5V 3 5V PINS 1 2 15 16 SECAM SIGNALS ON PAL NTSC SIGNAL OFF 0 4V 1 8V 1V 12µs 4µs 1 4ms SECAM 0 8Vcc P...

Page 98: ... reference Locking of the PLL of the B Y demodulator occurs every two frame flybacks in alternation with the tuning of the bell filter Locking of the PLL of the R Y demodulator occurs every frame flyback The error voltages of these PLLs are present in CC014 for the B Y and in CC019 for the R Y Capacitors CC015 and CC020 deaccentuate the SECAM B Y and R Y The R Y and B Y obtained travel through the...

Page 99: ...B18 13V CV103 DV104 CV102 DV101 6 8V RV101 RL052 RL053 USYS RL044 RL050 CL052 1 TTHT IV001 8V R V B FB1 FB PERITEL 1 OSD VIDEOTEXT R R V V B B from BC011 to CRT CATHODE R V B 4 3 1 7 10 13 6 11 14 IB01 TV063 EF TV073 EF TV083 EF ABL CTI DELAY EDGES IMPROVMENT CORING PEAKING BLACK EXTENSION WHITE EXTENSION 54 55 56 53 52 51 APX 49 RV052 DV108 DL051 DL052 DL050 20V TV108 PKS ICUT CENTRE DE FORMATION...

Page 100: ...ransitions without increasing noise BLACK STRETCH circuit that increases contrast in a picture with only a few small dark areas WHITE STRETCH circuit that increases the average light value in a picture with a few bright areas After this processing the luminance signal is available on Output 56 of IV001 CHROMINANCE PROCESSING Colour difference signals B Y and R Y are injected at 2 and 3 of IV001 an...

Page 101: ...B18 13V CV103 DV104 CV102 DV101 6 8V RV101 RL052 RL053 USYS RL044 RL050 CL052 1 TTHT IV001 8V R V B FB1 FB PERITEL 1 OSD VIDEOTEXT R R V V B B from BC011 to CRT CATHODE R V B 4 3 1 7 10 13 6 11 14 IB01 TV063 EF TV073 EF TV083 EF ABL CTI DELAY EDGES IMPROVMENT CORING PEAKING BLACK EXTENSION WHITE EXTENSION 54 55 56 53 52 51 APX 49 RV052 DV108 DL051 DL052 DL050 20V TV108 PKS ICUT CENTRE DE FORMATION...

Page 102: ...line transformer and indicates the tube rate The AUTO PIX circuit is an AGC that compensates for the differences in level between the various sources After automatic control of the cutoffs the signals are amplified and made available on Outputs 40 through 42 of IV001 The gain of these amplifiers can be adjusted via Operating Mode R DRV G DRV and B DRV The RGBs are then sent to the tube via the tra...

Page 103: ...RB18 13V CV103 DV104 CV102 DV101 6 8V RV101 RL052 RL053 USYS RL044 RL050 CL052 1 TTHT IV001 8V R V B FB1 FB PERITEL 1 OSD VIDEOTEXT R R V V B B from BC011 to CRT CATHODE R V B 4 3 1 7 10 13 6 11 14 IB01 TV063 EF TV073 EF TV083 EF ABL CTI DELAY EDGES IMPROVMENT CORING PEAKING BLACK EXTENSION WHITE EXTENSION 54 55 56 53 52 51 APX 49 RV052 DV108 DL051 DL052 DL050 20V TV108 PKS ICUT CENTRE DE FORMATIO...

Page 104: ...s added to the RGB gun cutoff measurement currents During Lines 22 and 335 the blue channel is in operation The blue gun measurement current plus the compensation current produce a voltage at the terminals of RV092 This voltage is compared to an internal 3 V reference and then determines the black level of the blue signal During Lines 23 and 336 the green channel is in operation Its automatic cont...

Page 105: ...102 102 CENTRE DE FORMATION TECHNIQUE ...

Page 106: ...IV601 TDA9143 SIGNAL PROCESSING BEFORE DIGITISING 100 Hz DIGITAL PROCESSING STRUCTURE OF PLL CLOCKS FORMAT CHANGES SMOOTHING AND CORRECTION OF SIGNALS Y2H U2H AND V2H RGB PROCESSING BEAM LOCK AUTOMATIC CUTOFF CONTROL CENTRE DE FORMATION TECHNIQUE 103 103 ...

Page 107: ...ions improvment RVB dematriçage YUV switching bright cont satur beam limiter RVB matrix APX CRT servo IV001 IV308 CAN 50 100Hz compression format control CNA VCO gestion VCO 12 16 18MHz VCO 32MHz VCO 27MHz R V B FB Y V C Y1H U1H V1H Y2H V2H U2H Y U V R V B SC U V U V HA VA A D VIDEO MODULE 19100 R V B FB CENTRE DE FORMATION TECHNIQUE ...

Page 108: ...rforms the following functions Analogue to digital conversion 50 100 Hz compression Format checking Digital to analogue conversion VCO management Circuit IV309 TMS4C29720T is the frame memory It has a capacity of 245760 12 bits Circuit IV001 STV2165 video module improves the YUV transitions Circuit IV001 STV2162 main board performs the following functions Dematrixing of Teletext and Menu RGBs into...

Page 109: ...V604 CV605 CV 606 RV606 CV613 CV 614 CV 615 QV602 3 58MHz QV601 4 43MHz CV 618 CV 619 VA HA CL2 DA2 R V B FBAV1 PERITEL Y without synchro U V IV601 CVBS Y C from 17 BV011 from 19 BV011 to 31 IV308 to 30 IV308 to TV801 to TV821 to TV841 1Vcc 0 3Vcc 5Vcc 20ms 0 16 Vcc 0 8Vcc 5Vcc 64µs 1Vcc 1Vcc 1Vcc 1Vcc 1Vcc 1Vcc 4 5Vcc SC U V V U 4V SEC 3 8V 4 2V CENTRE DE FORMATION TECHNIQUE ...

Page 110: ...ion requires an oscillator that works with one of the external oscillator crystals The SECAM decoder is a self calibrated PLL demodulator Pin 29 whose VCO is adjusted during frame flyback Demodulation is completed via a 64 µs CCD delay line IV602 TDA4665 This circuit is controlled by the SC signal from Output 10 of IV601 MATRIXING AND SWITCHING OF EXTERNAL RGB SIGNALS RGBs from a SCART source are ...

Page 111: ... 803 AMPLI TV821 EF CV821 822 CV824 LV821 ANTI ALIASING FILTER TV822 823 AMPLI TV841 EF CV841 842 CV844 LV841 ANTI ALIASING FILTER TV842 843 AMPLI Y1H U1H V1H 26 24 22 12 14 13 Y without synchro U V IV601 IV308 0 8Vcc 1Vcc 1Vcc 1 2Vcc 2Vcc 2Vcc CENTRE DE FORMATION TECHNIQUE ...

Page 112: ...ss anti overlap filters limiting their pass band and are amplified and injected into IV308 After being processed in this way these signals are digitised in IV308 in 4 1 1 version Y 8 bits U 2 bits and V 2 bits The sampling frequency for Y is 16 MHz NOTES CENTRE DE FORMATION TECHNIQUE 109 109 ...

Page 113: ...32 53 56 41 37 36 67 66 63 4 3 2 14 15 16 23 22 21 2 à 9 10 à 13 28 à 35 24 à 27 9 12 à18 5 à 8 47 à 52 57 58 59 à 62 4 2v 2 8v 1 2Vcc 2Vcc 2Vcc 1Vcc 1 5Vcc 1 5Vcc 1 68 CL2 DA2 IV309 0 0 0 5V 5V 5V 5V 5V 5V 0 0 0 HA VA RSTW W RSTR R T 64µs T 20ms T 20ms T 10ms 4 5µs 160µs 160µs 12µs 52µs 1 6ms 64µs 6µs 26µs 0 75ms 3 5Vcc 10Vcc 4Vcc 6Vcc 0 7Vcc CENTRE DE FORMATION TECHNIQUE ...

Page 114: ...gue to digital conversion IV308 Y 8 bits U 2 bits V 2 bits The sampling frequency can be 12 16 or 18 MHz according to picture and screen format Digital samples are available on Outputs 5 through 9 and 12 through 18 of IV308 Writing to frame memory IV309 Signals SWCK RSTW and W control this writing SWCK is the writing clock Its frequency is identical to the sampling frequency RSTW resets the writin...

Page 115: ...32 53 56 41 37 36 67 66 63 4 3 2 14 15 16 23 22 21 2 à 9 10 à 13 28 à 35 24 à 27 9 12 à18 5 à 8 47 à 52 57 58 59 à 62 4 2v 2 8v 1 2Vcc 2Vcc 2Vcc 1Vcc 1 5Vcc 1 5Vcc 1 68 CL2 DA2 IV309 0 0 0 5V 5V 5V 5V 5V 5V 0 0 0 HA VA RSTW W RSTR R T 64µs T 20ms T 20ms T 10ms 4 5µs 160µs 160µs 12µs 52µs 1 6ms 64µs 6µs 26µs 0 75ms 3 5Vcc 10Vcc 4Vcc 6Vcc 0 7Vcc CENTRE DE FORMATION TECHNIQUE ...

Page 116: ...ency the picture is compressed RSTR resets the reading line counter R enables memory reading Digital to analogue conversion IV308 Y2H U2H and V2H are available on Outputs 36 37 and 41 of IV308 NOTES CENTRE DE FORMATION TECHNIQUE 113 113 Y1H U1H V1H Y2H U2H V2H SWCK 16MHz SRCK 32MHz MEMOIRE A B A1 B1 A2 B2 A3 A A B B A1 A1 B1 B1 A2 A2 B2 B2 A3 A3 20ms 10ms SWCK ECRITURE SRCK LECTURE ...

Page 117: ...CO 12 16 18MHz TV300 TV301 TV302 DV303 DV304 SWITCH VCO 12 16 18MHz HA LLA LLDFL LLD FILTDISP FILTDEF FILTACQ 2 5V SELCL VDFL HDFL 31 28 27 32 29 53 43 56 IV308 45 46 1 2 3 IV304 12MHz 5V 16MHz 0 18MHz 1 6V 12MHz TV301 TV302 open 16MHz TV301 TV302 close 18MHz TV301 close TV302 open CENTRE DE FORMATION TECHNIQUE ...

Page 118: ... synchronisation signal 15625 Hz These three frequencies determine the different picture formats Switching of these three frequencies is performed via Output 28 of IV308 and Transistors TV300 through TV302 Output 28 or IV308 has the following 0 to enable the 16 MHz frequency 5 V to enable the 12 MHz frequency 1 6 V HZ to enable the 18 MHz frequency This 1 6 V is determined by resistive divider RV3...

Page 119: ...CREEN 4 3 NORMAL W 16 R 32 ZOOM 1 W 18 R 32 ZOOM 2 W 18 R 27 PROGRAM 16 9 SCREEN 4 3 NORMAL W 16 R 32 ZOOM 1 W 18 R 32 ZOOM 2 W 18 R 27 PROGRAM 16 9 SCREEN 16 9 NORMAL W 16 R 32 PROGRAM 4 3 SCREEN 16 9 NORMAL W 12 R 32 ZOOM 1 W 16 R 32 ZOOM 2 W 18 R 27 ...

Page 120: ...applied via the memory writing and reading speeds W and R This change is visible only through its effect on picture width The frame sweep must be acted on accordingly for the picture height The following tables list the various formats according to clock frequency NOTES CENTRE DE FORMATION TECHNIQUE 117 117 ...

Page 121: ...LAT FILTER TV051 EF CLAMP TRANSITION IMPROVMENT LV071 CV071 CV074 FLAT FILTER TV071 EF CLAMP TRANSITION IMPROVMENT BLACK EXTENSION 36 37 41 26 30 28 18 14 15 3 1 9 6 13 CV031 CV027 RV032 9VM MAIN Y MAIN U MAIN V Y2H U2H V2H SSC CL2 DA2 IV308 IV001 1Vcc 1 5Vcc 1 5Vcc 0 6Vcc 1 4Vcc 1 4Vcc 0 6Vcc 1 4Vcc 1 4Vcc CENTRE DE FORMATION TECHNIQUE ...

Page 122: ... creating overshoots CORING and PEAKING circuit that improves signal transitions without increasing noise BLACK STRETCH circuit that increases contrast in a picture with only a few small dark areas After this processing the luminance signal is available on Output 9 of IV001 and is sent to Pin 5 of Connector BV011 Colour difference signals U2H and V2H are injected at 30 and 28 of IV001 and pass thr...

Page 123: ...1 42 44 48 47 46 50 RV092 TB18 LB16 RB17 RB18 13V CV103 DV104 CV102 DV101 6 8V RV101 RL052 RL053 USYS RL044 RL050 CL052 1 TTHT IV001 8V R FB OSD VIDEOTEXT R V V B B to CRT CATHODE R V B 1 1 1 13 13 13 14 14 14 IB01 TV063 EF TV073 EF TV083 EF ABL 56 53 APX 49 RV052 DV108 DL051 DL052 DL050 20V TV108 PKS ICUT WHITE EXTENSION IB02 IB03 CENTRE DE FORMATION TECHNIQUE ...

Page 124: ...and indicates the tube rate The AUTO PIX circuit is an AGC that compensates for the differences in level between the various sources After automatic control of the cutoffs the signals are amplified and made available on Outputs 40 through 42 of IV001 The gain of these amplifiers can be adjusted via Operating Mode R DRV G DRV and B DRV The RGBs are then sent to the tube via the transistors TV063 07...

Page 125: ...1 42 44 48 47 46 50 RV092 TB18 LB16 RB17 RB18 13V CV103 DV104 CV102 DV101 6 8V RV101 RL052 RL053 USYS RL044 RL050 CL052 1 TTHT IV001 8V R FB OSD VIDEOTEXT R V V B B to CRT CATHODE R V B 1 1 1 13 13 13 14 14 14 IB01 TV063 EF TV073 EF TV083 EF ABL 56 53 APX 49 RV052 DV108 DL051 DL052 DL050 20V TV108 PKS ICUT WHITE EXTENSION IB02 IB03 CENTRE DE FORMATION TECHNIQUE ...

Page 126: ...added to the RGB gun cutoff measurement currents During Lines 22 and 335 the blue channel is in operation The blue gun measurement current added to the compensation current produces a voltage at the terminals of RV092 This voltage is compared to an internal 3 V reference and then determines the black level of the blue signal During Lines 23 and 336 the green channel is in operation Its automatic c...

Page 127: ...124 124 CENTRE DE FORMATION TECHNIQUE ...

Page 128: ...MEGATEXT OSD CONTENTS PROCESSING OF TELETEXT AND OSD CENTRE DE FORMATION TECHNIQUE 125 125 ...

Page 129: ... 32 à 35 10 11 13 15 17 36 38 40 41 42 43 5VTXT QT001 20 48MHz RT 009 RT 008 3V 20 10 3 17 4 5 à 9 11 à 15 1 2 18 19 RAS CAS W M_RES M3L_ENAB M3L_DATA M3L_CLK SSC V_SYNC FB TXT OSD B TXT OSD V TXT OSD R TXT OSD VIDEO_1 IT001 µC IT002 DRAM 2Vcc 1Vcc 2 5Vcc 5Vcc 5Vcc 1Vcc 1Vcc 1Vcc 10 1 2 3 4 7 8 3 4 2 6 BT004 BT021 A0 to A9 IO1 to IO4 CENTRE DE FORMATION TECHNIQUE ...

Page 130: ...AM IT002 A page of data occupies 1 KB of memory on average IT002 is designed for 512 pages of Teletext The data Teletext acquisition PLL is locked from the video signal Pin 9 of IT001 The display Teletext and OSD PLL is locked from the line and frame signals arriving on Pins 3 and 4 of IT001 The display generator supplies 4 bit words for each pixel and each of the R G and B signals The R G and B s...

Page 131: ...128 128 CENTRE DE FORMATION TECHNIQUE ...

Page 132: ...RVB AMPLIFIERS CONTENTS GENERAL INFORMATION RGB AMPLIFIER SPOT BLANKING BSVM CORRECTION CIRCUIT CENTRE DE FORMATION TECHNIQUE 129 129 ...

Page 133: ...RM24 TM06 TMO7 TM08 TM05 TM01 02 04 différentiation RM16 DM01 RM17 RM45 CM13 CM31 RM29 CM32 TM09 RM47 TB18 RB18 RB17 DB07 RM04 RM03 RM02 R V B I_CUT UVERT USYST G1 U13V U13V UVIDEO RM 19 RM 23 RM21 RM32 8 CM03 RB16 Vréf CB07 BM03 3 5 7 1 5 1 3 3 2 BM04 BB01 BB02 KR KV KB cathodes current level CRT BS19000 CRT BS19001 Y 8 CM07 CM09 CENTRE DE FORMATION TECHNIQUE ...

Page 134: ... the I CUT signal required for automatic control of the tube to 4 V SPOT BLANKING In operation CB03 is charged to 150 V The voltage of Grid G1 is 0 6 V because of DB04 When the TV is switched off the 200 V disappears Capacitor CB03 generates and polarises G1 to 150 V which prevents any secondary emission BSVM CORRECTION CIRCUIT This correction consists in accelerating spot movement over the first ...

Page 135: ...132 132 CENTRE DE FORMATION TECHNIQUE ...

Page 136: ...AUDIO PROCESSING CONTENTS AUDIO MODULE WITH MSP3410 AUDIO POWER AMPLIFIER IA001 IA001 MUTE BOOMER POWER AMPLIFIER IA002 IA002 MUTE INTERLOCK CENTRE DE FORMATION TECHNIQUE 133 133 ...

Page 137: ...29 25 26 3 5 1 7 5 3 7 1 IS60 AMPLI IS01 ADAPT 15 13 BS02 1 3 BS03 to headphone sockets to ampli and hps BS04 IS40 G D G D D G D D D D D G G G G G AUDIO MODULE AV3 AV2 AV1 39 24 SND RES 12 AUDIO FM DEMODULATION AUDIO NICAM DEMODULATION SWITCHING AUDIO SOURCES AUDIO CORRECTION QS40 18 432MHz 62 63 18 57 39 5V 5V 3 1 8V 13V 2 IS10 REG CENTRE DE FORMATION TECHNIQUE ...

Page 138: ...he SCART outputs Analogue to digital conversion of the various audio sources Corrections on digital audio signals tone pseudo stereo expanded stereo headphone volume speaker volume etc Digital to analogue conversion The audio signals for the headphone outputs are available on Pins 25 and 26 of IS40 They are amplified by Integrated Circuit IS60 and sent to Connector BS03 The audio signals for the s...

Page 139: ...5VSTBY US US AM FM MODULE 19101 TP190 RP193 5VSTBY RP192 RP191 DP190 RP190 RP129 RP170 TP170 RP173 TP129 CP126 RP130 JP913 RP126 DP126 RP127 DOLBY 28 SAFETY IV001 Mute RA034 G D SPEAKER 15 RP128 RA023 RA024 RA027 CA018 RA028 6 5 7 2 4 1 3 MUTE DA001 RA017 RA016 TA001 RA026 2 BA004 IA002 BOOMER VERSION RA021 RA020 5VSTBY RA001 CA019 US US CENTRE DE FORMATION TECHNIQUE ...

Page 140: ...mal operation the voltage at this pin is close to 8 V due to the saturation of TA001 INTERLOCK In the event of an overload on the US power supply line TP190 saturates and leads to the saturation of TP170 In the event of an overload on the US line the negative voltage 5 V on the anode of DP150 becomes positive and leads to the conduction of TP170 In both cases the voltage at 28 of IV001 goes to 0 T...

Page 141: ...138 138 CENTRE DE FORMATION TECHNIQUE ...

Page 142: ...MODULE AUDIO WITH DOLBY PROLOGIC CONTENTS INTRODUCTION OPERATION CENTRE DE FORMATION TECHNIQUE 139 139 ...

Page 143: ...140 140 7KHz 90 90 3dB 3dB DOLBY NR LEFT CENTER RIGHT AMBIANCE Full LEFT Full RIGHT DOLBY SURROUND SCRAMBLE CENTRE DE FORMATION TECHNIQUE ...

Page 144: ...ht channels A central channel After attenuation this is added identically to the two channels A background channel attenuated band pass limited corrected modified Dolby B phase shifted by 90 and 90 is added to the two channels The two channels called Total Left and Total Right can be carried to the user via any stereophonic medium This system is fully compatible with classic stereophonic equipment...

Page 145: ... 9 6 1 TS354 EF TS400 INV TS405 INV DS400 DS405 20 CS 22 OE 27 WE ID001 DSP ID002 RAM IS250 MSP IS150 MSP BS001 BS002 BS009 BS002 BS003 BS006B BS006A BS001 L R L R SURROUND SURROUND HEAD L HEAD R CENTER IIC CL 1 IIC DA 1 SND RESET SIF AM AF AV1 L AV1 R AV2 L AV2 R AV3 L AV3 R AV2 L AV2 R AV1 L AV1 R MAIN L MAIN R L R TOT CENTER RESET IIS CL IIS WS IIS CL IIS WS SND RESET L R SURROUND L R XTAL IN M...

Page 146: ...sent to the second MSP These connections are made via Bus I2S During installation the DSP uses a program controlled by the microcontroller to generate a sequence of noises for system configuration The levels of the various channels can thus be adjusted according to the user s set up These adjustments are essential to obtain good results from the decoding of Dolby Prologic The DSP is associated wit...

Page 147: ...144 144 CENTRE DE FORMATION TECHNIQUE ...

Page 148: ...AME_DR UREF AV1_ROUT AV1_ROUT EW_DRIVE B_TXT B_TXT AV1 PIN8 AV1_LOUT AV1_LOUT R_AV1 R_AV1 R_AV1 H_DRIVE AV2_LOUT AV2_LOUT AV1_R_IN AV1_R_IN RESET DEGAUSS BE STROBE CHROMA_1 CHROMA_1 AV2 PIN8 CENTERMUTE CENTERMUTE SOUNDRESET SOUNDRESET FB_AV1 FB_AV1 I2CBUS2 R_TXT R_TXT AV1_Y_OUT B_AV1 B_AV1 KB_ROW_3 USYS V_SAFE SMPS_OUT SMPS_IN AV2 IN C AV4_C_IN AV1_8 AV2_Y_OUT VIDEO_2 VIDEO_2 CVBS SAT VIDEO_1 VIDE...

Page 149: ... DL147 DL148 CL148 RL057 CL057 GNDL RL135 THERMAL PROTECTION IP140 TDA8139 USYS 205 7 9 7 2 4 2 13 5 53 7 8 9 3 7 1 1 2 1 2 3 2 2 7 0 0 13V 13V 13V 26 9 3 2 0 2 16 9 131 6 16 9 26 2 2 3 2 3 13 3 5 5 6 5 5 2 5 26 2 4 2 13 12 8 3 5 7 5 7 12 1 130 12 6 9 2 5 0 1 0 1 0 7 11 7 6 9 6 7 6 8 6 8 7 8 0 5 53 5 10V STBY 5V 13V US USYS US 5V STBY 10V STBY 5V 0 0 0 0 0 4 0 1 4 9 0 8 2 4 2 6 11 1 0 9 9 6 ON STB...

Page 150: ... to heatsink P H H R R R R P A AUDIO PART AP 19000 00 5VSTBY 5VSTBY US US US US P P P TX920 BC546B BC546B TX950 BC848B TX960 CX901 220n RX992 1R CX001 220n 2k2 RX301 2k2 RX303 75R RX115 75R RX107 100R RX131 75R RX111 75R RX215 100k RX351 100k RX251 120k RX350 100k RX151 120k RX250 120k RX150 75R RX120 75R RX220 100R RX133 100R RX132 100R RX134 10k RX281 6k8 RX282 2k2 RX956 RX991 1R 100R RX955 100R...

Page 151: ...10 220n CS11 220n CS55 390p CS54 390p CS47 220n CS49 470p CS48 470p CS44 220n CS42 220n CS40 1p CS41 1p CS28 470p CS26 470p CS75 100p CS76 100p CS36 470p CS37 220p CS38 220p CS64 1n MC78L08 ACP IS10 1 2 3 150R RS13 BS03 1 2 3 BS11 1 2 3 4 5 6 7 8 150R RS09 IS60 6 5 7 8 4 MC4558CD CS35 470p CS66 1n 47k RS34 470p CS92 47u LS19 150R RS08 RS03 0R 470p CS93 MC4558CD IS01 6 5 7 8 4 MC4558CD IS01 2 3 1 8...

Page 152: ...RB51 1k5 560k RB02 RB66 470R RB46 470R RB18 5k6 RB31 1k5 PB01 BAV21 DB32 CB19 100p CB04 100n CB08 100n CB13 100p CB01 10n CB66 470p CB18 10n CB26 470p CB46 470p RB26 470R RB22 1k2 CB06 10u CB07 1000u RB42 1k2 BAV21 DB72 BAV21 DB52 1N DB28 1N DB68 1N4004GP DB04 1N DB66 BAV21 DB71 BAV21 DB31 1N DB46 1N DB26 BAV21 DB51 RB16 2k2 CRT 19004 00 CRT 19001 00 TB18 BC558B 10R RB06 1k5 RB79 RB62 1k2 BB10 1 2...

Page 153: ...01 4K7 RX740 4K7 RX741 165R0 RX320 100K0 RX830 47K0 RX820 100R0 RX803 100R0 RX801 1K0 RX814 10K0 RX800 47K0 RX811 10K0 RX810 165R0 RX321 BX700 BX300 BX100 BX200 2U2 LX800 1N4001 DX500 1N4148 DX501 1N4148 DX800 MC7809 CT IX500 1 2 3 JX500 1R0 RX600 AV2_C_IN AV3_C AV3_Y AV2 8 AV3_Y_IN AV3_C_IN GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS GNDS AV...

Page 154: ...1 42 43 44 45 46 47 48 49 50 51 52 CT022 100n BT021 1 2 3 4 5 6 7 8 9 10 11 12 RT023 47k RT038 0R BC848C TT007 RT014 100R CT021 100n CT020 47p DVT 19000 01 DVT 19010 00 CT035 100p TT002 BC858C RT042 475R RT036 475R RT037 392R TT010 BC858C RT040 470R RT034 392R TT009 BC858C 47u CT050 5u6 LT003 CT033 100p RT033 475R TT008 BC858C RT035 0R RT031 392R CT031 100p RT030 475R QT001 1 2 20 48M RT032 0R CAS...

Page 155: ...7R RH37 5V6 DH46 4N7 CH39 10N CH49 2R2 RH92 BB639C DH43 22K RH41 3K9 RH03 1R RH42 S595TR TH40 1 2 3 4 4R7 RH49 S595TR TH01 1 2 3 4 47R RH09 1P CH07 1N CH06 BB535 DH05 22K RH10 9P CH08 VAL CH42 100P CH09 22K RH11 BB535 DH06 100P CH12 1N CH28 9P CH11 10R RH88 22K RH50 10P CH05 1N CH36 1N CH37 470K RH01 470K RH36 470K RH33 5V6 DH47 100P CH04 22K RH06 22K RH05 BB535 DH02 BB535 DH03 22K RH04 12P CH03 4...

Page 156: ...REGLAGES SERVICE LAGEPLAN POSIZIONE REGULATORI DI SERVIZIO SITUACIÓN DE LOS AJUSTES CRT Board CONVAR MCU BV010 Degauss ASIA RP only Bus2 Free Free RP only SSC RP ABL BR012 BR009 BR011 BR010 FI001 FI002 LI051 FI030 PI030 PI050 IX001 PI035 BX002 BX001 DL030 BV005 BV021 BV006 DP140 BA006 3 1 TL030 CP020 LP019 TP060 ICC 19XXX MAIN BOARD IA001 1 11 BA001 BA005 BL035 BL052 BL050 DP110 DP130 DL043 DL046 ...

Page 157: ...tialisiert werden alle Ein und Ausschaltzeitgeber gelöscht wird die SCART Scaltspannung ignoriert werden AV Link WSS EPG und Teletext gesperrt wird die Automatische Abschaltung bei fehlendem Antennensignal gesperrt werden Kontrast Farbe und Helligkeit auf standardwerte gesetzt wird die bildschärfe auf Mittelstellung nominal gesetzt wird der Kontrast Expander auf gering gesetzt wird der Installatio...

Page 158: ...d image et des lignes de cut off en haut d écran 1 Ampiezza verticale grande a sufficienza 7 di sovrascanzioni 2 Riduzione della soppressione verticale visibile in alto e in basso 3 Aumentare passo passo vuoto in basso per veder scomparire le linee di interdizione in alto 4 Aumentare ancora di un passo 5 Regolare con precisione l ampiezza e la posizione verticali 1 Amplitud V suficientemente grand...

Page 159: ...050 1 FI015 PI035 LOCATION OF CONTROLS EMPLACEMENT DES REGLAGES SERVICE LAGEPLAN POSIZIONE REGULATORI DI SERVIZIO SITUACIÓN DE LOS AJUSTES CRT Board CONVAR MCU BV010 Degauss ASIA RP only Bus2 Free Free RP only SSC RP ABL BR012 BR009 BR011 BR010 FI001 FI002 LI051 FI030 PI030 PI050 IX001 PI035 BX002 BX001 DL030 BV005 BV021 BV006 DP140 BA006 3 1 TL030 CP020 LP019 TP060 ICC 19XXX MAIN BOARD IA001 1 11...

Page 160: ...elöscht reinitialisiert werden alle Ein und Ausschaltzeitgeber gelöscht wird die SCART Scaltspannung ignoriert werden AV Link WSS EPG und Teletext gesperrt wird die Automatische Abschaltung bei fehlendem Antennensignal gesperrt werden Kontrast Farbe und Helligkeit auf standardwerte gesetzt wird die bildschärfe auf Mittelstellung nominal gesetzt wird der Kontrast Expander auf gering gesetzt wird de...

Page 161: ...rke int Lautsprecher Normal sound control Einstellung der Lautstärke der Cinchbuchsen HIFI Anlage 1 V Position und V Amplitude optimal einstellen V amp vorabgleich 7 Überschreibung 2 V Blank soweit verändern daß am oberen und unterern Bildrand gerade eine Austastung sichtbar wird 3 Den Wert von Blank um 2 steps erhöhen 2 x die Taste drücken default value 0FH Agir sur H VCO pour obtenir une image l...

Page 162: ...AIN BOARD PLATINE PRINCIPALE CHASSIS GRUNDPLATTE PIASTRA PRINCIPALE PLATINA PRINCIPAL COMPONENT SIDE COTE COMPOSANTS BESTÜCKUNGSSEITE LATO COMPONENTI LADO COMPONENTES SOLDER SIDE CÔTE SOUDURES LÖTSEITE LATO SALDATURE LADO SOLDADURAS ...

Page 163: ... D1 JR021 D1 JR022 D1 JR023 D0 JR024 E3 JR026 D1 JR027 F2 JR028 E2 JR029 G0 JR030 E2 JR031 E3 JR032 F2 JR033 F0 JR035 G3 JR036 G3 JR038 F4 JR040 G4 JR045 C3 JR100 A0 JR102 C3 JR103 B3 JR104 C1 JR105 D1 JR106 D1 JR107 C3 JR108 C3 JR109 C3 JR110 D3 JR111 D3 JR112 D3 JR114 D3 JR116 D4 JR117 D4 JR118 D4 JR119 E4 JR120 E4 JR121 E4 JR122 E4 JR123 E4 JR125 E3 JR126 E3 JR127 E4 JR128 F3 JR129 E2 JR131 E1 ...

Page 164: ...dice 10448410 600Vpp T 32µs 0 10k RP120 10k RP123 CP112 100R RP102 MUR1100E DP112 1k2 RP112 DP108 DP109 DP140 GP10D DP050 R 2 DP113 10k RP121 10k RP124 100u 200V CP110 330p CP050 35V 470u CP121 4700u CP140 2 5W 0R10 RP130 35V 470u 470p 470p CP120 CP138 CP137 1n CP102 1 95u LP112 JP916 10R RP050 2k2 RP126 1 2 GND2 GND2 GND2 GND1 2 UB Driver Flyback 13 o o o o 5 6 14 15 16 19 18 10 9 8 CP021 150p 13...

Page 165: ...47V 470n CL073 100n CL037 1n CL064 RL066 10k7 RL058 3k3 RL067 3k3 RL068 1k 1k RL160 100R JL020 10k RL064 3k9 RL069 DL036 DL034 100R RL065 1k RL037 8k2 RL054 1k RL073 TL082CD IL062 6 5 7 8 4 JL934 47R IL062 2 3 1 8 4 BC847B TL063 CL036 BC848B TL062 BL035 10k RL056 RL055 L H 1n CL063 CL033 1n CL066 1n CL061 L933 L033 3 6 JL932 JL936 RL134 RL124 RL137 RL136 RL126 RL135 LL034 1 2 3 4 5 6 CL034 CL067 D...

Page 166: ...n case of failure of IC TDA8177F in position IF001 Solution CAUTION Version TDA8177F Part No 10352880 is able to carry higher output currents than the TDA8177 Part No 15053440 used in TX92 chassis If the wrong IC is used the replacement device will be distroyed at Switch On ...

Page 167: ... applicable to Italy Picture interference when receiving VHF Band 1 signals either moire patterning or black vertical bars on the screen Cause Cross talk between power supply and tuner Solution Replace the switch mode transformer LP020 with either 10553820 stereo 10553830 dolby stereo ...

Page 168: ...9151 34 10520600 10520330 JP915 134V ICC19 MM A66EHJ 48X 12 4 3 28 MP AK no BSVM CT 19103 34 10556010 10551170 JP915 134V ICC19 BASIC A68EGV038X322 4 3 29 SF SS INVAR BSVM CT 19155 37 10562020 10551150 JP914 137V ICC19 IM MM A80AJA 16X120 4 3 33 MP INVAR BSVM CT 19156 37 10561990 10510870 JP914 137V ICC19 IM A90AFX 16X120 4 3 37 MP INVAR BSVM CT 19156 37 10561990 10510870 JP914 137V ICC19 IM ICC19...

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