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Roadstar CTV-1450, Service Manual

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110VDC

28V

13V

8V

5V

SMPS

Micro Processor (UOC IC ) 
TDA 9351

FBT

Audio Processor
TDA 9859

Tuner

Vertical output
STV 9302A

Video Amplifier

CRT

Audio Output

AN17821 

Key 

IR

SCART

SWITCH IC
HEF4052BP

FRONT
AV

Memory 
AT24C16

Horizontal
O/P TR.

Horizontal
O/P driver

Speaker

BLOCK DIAGRAM

45

Summary of Contents for CTV-1450

Page 1: ...Service Manual CTV 1450_2050 Service Manual CTV 1450_2050 R CTV 1450_2050...

Page 2: ...UOC IC TDA 9351 FBT Audio Processor TDA 9859 Tuner Vertical output STV 9302A Video Amplifier CRT Audio Output AN17821 Key IR SCART SWITCH IC HEF4052BP FRONT AV Memory AT24C16 Horizontal O P TR Horizo...

Page 3: ...5 5 plastica grezza x g LOCAL 1500001000 21 4 4 vernice x g LOCAL 1500002000 22 3 3 vite per fissaggio pulsantiera 4x12BT 2 n FA LOC 1100001767 23 3 3 logo ROADSTAR CTV 1450 KT 1 n FA 1100009120 24 3...

Page 4: ...sis 14 1 n SKD vedi tabella p 2 vedi tabella 44 3 3 cappuccio per pulsante accensione 1 n FA 1200000687 45 3 3 cavo di alimentazione 220 V 1 n SKD JP2202 V004 X 1100009704 46 3 3 filo gommato nero per...

Page 5: ...T0X0008 T3 1100002593 64 3 3 busta polietilene 235x330 mm 1 n LOCAL 1300000385 65 1 1 Scatola imballo TV 1 n 66 3 3 scatola imballo piana 1 n LOCAL 1300001358 67 3 3 busta TV polietilene 850x800 mm 1...

Page 6: ...2 SKD 1700002003 3 SKD 1700002004 4 5 Tipo Cinescopio Provenienza Codice componente Tipo Chassis A34LEX10X SAMTEL India 1100001679 VE02 14SMT A34KQW42X01 SAMSUNG SDI Malaysia 1700001001 VE02 14SMG A33...

Page 7: ...M Z332 XT6 5M Z333 XT6 0M C333 47u 16V C335 10u 16V R339 110 R340 100 R338 330 C334 10u 16V C316 0 1u C551 1000p R563 27K VD561 MTZJ8C2 XS801 R821 3 9K R822 10K C821 470p C822 1u C846 470p C847 1u R84...

Page 8: ...1 COLOR TELEVISION SERVICE MANUAL CHASSIS VE01 MODEL NO 1450KT 2050KT 2150KT...

Page 9: ...Description with Pin Details 12 11A TDA9351 12 18 11B HEF4052BP 18 19 11C STV9302A 19 20 11D IC AT24C16 20 21 11E TDA9859 21 23 11F AN17821 24 11G STR5Q0765 24 25 11H Video Amplifier Transistors 25 26...

Page 10: ...are to be connected disconnected switch off the set Wear rubber shoes non conducting so that your body does not become a passage for electric current INTRODUCTION VE01 chassis is capable of driving 1...

Page 11: ...witch 16 9 0 2 V TV 5 8 V WideScreen 9 5 12 V AV Mode 10 kohm 9 G GND RGB Green Ground 10 CLKOUT Data 2 Clockpulse Out Unavailable 11 G RGB Green In 0 7 V 75 ohm 12 DATA Data 1 Data Out Unavailable 13...

Page 12: ...ion between both signals is realized by means of the SVO bit in sub address 22H The video ident circuit can be connected to the incoming internal video signal or to the selected signal This ident circ...

Page 13: ...frequency 4 5 5 5 6 0 6 5 MHz by means of a calibration circuit which uses the clock frequency of the Controller Teletext decoder as a reference The setting to the wanted frequency is realised by mean...

Page 14: ...sync pulses and a data slicing circuit which extracts the digital teletext data from the analog signal The horizontal drive signal is obtained from an internal VCO which is running at a frequency of...

Page 15: ...r bad signal conditions e g VCR playback in feature mode it may occur that the colour killer is activated although the colour PLL is still in lock When this killing action is not wanted it is possible...

Page 16: ...is way different colour temperatures can be obtained for the bright and the dark part of the picture The black current stabilization system checks the output level of the 3 channels and indicates whet...

Page 17: ...17821 is used as the AF out amplifier for the Stereo application It is supplied by 13 volts from the 13 volt DC coming from a separate winding in the SMPS transformer An out power of 1 5 Watt can be d...

Page 18: ...by SMPS transformer controlled by STR 0765 which is designed for deriving controlling and protecting switiching transistor of SMPS The transformer produces 110 volts for FBT 13 Volt for audio O p IC 3...

Page 19: ...like Continuous Cathode Calibration white point and black level offset AVL are added in this version As this is a combination of microcontroller and TV signal processor the features of IC are divided...

Page 20: ...ing mixed mode of OSD and Text signals Horizontal synchronization with two control loops and alignment free horizontal oscillator Vertical count down circuit Vertical driver optimized for DC coupled v...

Page 21: ...nted G2 and G3 characters Signal quality detector for video and WST VPS data types Comprehensive teletext language coverage Full Field and Vertical Blanking Interval VBI data capture of WST data Displ...

Page 22: ...e 3 3 V 8 MUTE Mute Low level 0V High Level 4 06 9 Vss C P Digital Ground for microcontroller 0V 10 BAND1 Band 1 not connected 0V 11 BAND2 Band 2 Not Connected 0V 12 Vss A Analog ground of teletext de...

Page 23: ...C Tuner AGC output Low level 0V high level 3 93V 28 AUDDEM Audio de emphasis or SIF input 1 3 14V 29 DECSDEM SIF2 Decoupling sound demodulator or SIF input2 2 23V 30 GND2 Ground 2 for TV processor 0V...

Page 24: ...OUT Audio output AM audio output volume controlled 3 31V 45 INSSW2 2nd RGB YUV insertion input 0V 46 R2 VIN 2nd R input V R Y input 2 49V 47 G2 YIN 2nd G input Y input 2 49V 48 B2 UIN 2nd B input U B...

Page 25: ...to Y3 and a common input out put Z The Common Channel Select Logic includes two address inputs A0 and A1 and an active low enable input INH Both Multiplexer De Multiplexer has four bi directional anal...

Page 26: ...2 Y0A independent inputs out puts 0 13 ZA Common input outputs 0 14 Y1A independent inputs out puts 0 20V 15 Y2A independent inputs out puts 0 07V 16 VDD VDD 7 96V 11C STV 9302A VERTICLE IC The STV 93...

Page 27: ...operating range Features Data EEPROM internally organized as 2048 bytes and 128 pages X 16 bytes Low power C MOS Vcc 2 7 5 5 Volt operation Two wire serial interface bus I2 C Bus Compatible Filtered...

Page 28: ...d the scart channel of a T V set Due to extended switching possibilities Signal from three stereo sources can be handled This is plastic shrink dual in line package 32 pin IC Features I2 C bus control...

Page 29: ...l 0 02V High Level 8V 7 AUDIO OUT Right Scart Out put right Channel Low Level 0 05V High Level 3 8V 8 GND Ground 0 9 VO 2 Main Out put Right Channel Low Level 0 17V High Level 3 8V 10 VI 8 Input to Lo...

Page 30: ...Capacitor Connection 2 Left CH Low Level 0 29V High Level 3 8V 23 VI 7 Input to Loud Speaker Left Channel Low Level 0 27V High Level 3 8V 24 VO 1 Main Output Left CH Low Level 0 25V High Level 3 8V 2...

Page 31: ...el 0V High Level 5V 6 Channel 1 input Low Level 0V High Level 1 44V 7 Ground 0V 8 Channel 2 input Low Level 0V High Level 1 44V 9 Volume 2 8V 10 Channel 2 out put Low Level 0V High Level 6V 11 Ground...

Page 32: ...to restart mode PINNING STR 5Q0765 Pin No Description Voltage in Volts 1 Drain 300 V 2 Ground 0 3 VCC Low level 12 59V High level 40V 4 Feedback Low level 0 3 V High level 6 9V 5 SYNC Low Level 0 74V...

Page 33: ...dure to enter in service mode 1 Press Menu Key on Remote Handset 2 Press 6483 on remote handset 3 M appears on the Screen 4 Press 1234 set will enter into Service Mode 5 To Change the value of paramet...

Page 34: ...value of SC by using channel up key so that thin white line will be visible on the screen 3 Adjust the screen intensity by varying screen pot of fbt using insulated screw driver until a thin horizont...

Page 35: ...0 63 32 G cut off BD 0 63 32 B cut off SB 0 63 42 Sub brightness SERVICE PRAMETERS MENU 4 Parameter Variation Default Setting Remarks OSD V POS 0 63 16 for 50Hz 8 for 60Hz To adjust OSD Vertical posi...

Page 36: ...Brightness 0 63 20 Cool BD Offset 0 32 10 Warm RD Offset 0 32 10 YD PAL 0 15 8 YD NTSC 0 15 8 YD SECAM 0 15 8 YD AV PAL 0 15 8 YD AV NTSC 0 15 8 YD AV SECAM 0 15 8 DESIGN PRAMETERS MENU 6 Parameter Va...

Page 37: ...F ON OFF EURO AV OFF ON ON S CURVE P1 0 70 20 S CURVE V1 0 75 40 S CURVE P2 0 100 70 S CURVE V2 0 100 75 DESIGN PRAMETERS MENU 8 Parameter Variation Default Setting CATHOD LEVEL 0 15 4 UOC VOLUME OFF...

Page 38: ...efault Setting BAND MODE 0 2 1 START ON 0 2 1 ON DELAY 6 15 10 LOGO OFF ON OFF NVM LOGO OFF ON OFF TXT BRIGHTNESS 0 63 20 SPANISH BIT OFF ON OFF NOT 0 OFF ON ON NOT 1 OFF ON ON NOT 2 OFF ON ON NOT 3 O...

Page 39: ...UOC IC TDA 9351 FBT Audio Processor TDA 9859 Tuner Vertical output STV 9302A Video Amplifier CRT Audio Output AN17821 Key IR SCART SWITCH IC HEF4052BP FRONT AV Memory AT24C16 Horizontal O P TR Horizo...

Page 40: ...RMAL INTENSITY 6 CHECK POWER ON OFF SWITCH OPERATION BY SWITCHING THE SWITCH ON OFF TWO TO THREE TIMES 7 CHECK FOR THE PROBLEMS LIKE CPT GAP SWITCH OFF SPOT STRAY EMISSION ETC 8 SELECT CHANNEL EU 2CH...

Page 41: ...1 OF 2 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR N STOCK NO LOC DESCRIPTION QPS SERVICE REMOTE 1 TV SET STAGE SCREEN ADJUSTMENT CONVERGENCE ADJUSTMENTS NOTE Before attempting an...

Page 42: ...ZONTALLY AT CENTRE 2 VERTICAL LINERITY ADJUSTMENT V SLOPE SELECT V SLOPE ADJUST IT BY VOLUME UP DN KEY TO ADJUST CENTRE DOTTED LINE OF RETMA PATTERN TO THE TOP EDGE OF BLACK HALF PATTERN i e EXACTLY T...

Page 43: ...QUIT THE MANUFACTURING SERVICE MODE OSD ALIGNMENT ON NTSC PATTERN 2 SELECT COLOUR BAR CIRCLE PATTERN NTSC SYSTEM SELECT PARAMETER OSD V POS OSD H POS BY CHANNEL UP DN KEYS ADJUST THE PARAMETER VALUES...

Page 44: ...SET 1 1 CONNECT THE RF SIGNAL CORD TO TUNER 2 CHECK FOR VOLUME VARIATION FROM ZERO TO MAX FOR CH 02 CH 05 SOUND SHOULD BE DISTORTION FREE AT MAX VOLUME LEVEL 3 CHECK FOR HISSING SOUND DISTORTED SOUND...

Page 45: ...VICE REMOTE 4 FOR NTSC ALIGNMENTS 1 SELECT NTSC PATTERN COLOR BAR CIRCLE PATTERN 2 PRESS MENU 6483 KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE THEN PRESS HOTKEY 1 TO ENABLE MENU 1 1 HORIZONTAL CENT...

Page 46: ...TRAST BRIGHTNESS COLOUR SHARPNESS 9 CHECK FOR ALL BANDS TUNING WITH THEIR RESPECTIVE SOUND 10 CHECK FOR WHITE BALANCE TILT ALIGNMENT COLOUR PATCH 11 CHECK FOR SELECTABLE PICTURE MODES AS STANDARD DYNA...

Page 47: ...2 XT6 5M Z333 XT6 0M C333 47u 16V C335 10u 16V R339 110 R340 100 R338 330 C334 10u 16V C316 0 1u C551 1000p R563 27K VD561 MTZJ8C2 XS801 R821 3 9K R822 10K C821 470p C822 1u C846 470p C847 1u R847 100...

Page 48: ...RMAL INTENSITY 6 CHECK POWER ON OFF SWITCH OPERATION BY SWITCHING THE SWITCH ON OFF TWO TO THREE TIMES 7 CHECK FOR THE PROBLEMS LIKE CPT GAP SWITCH OFF SPOT STRAY EMISSION ETC 8 SELECT CHANNEL EU 2CH...

Page 49: ...1 OF 2 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR N STOCK NO LOC DESCRIPTION QPS SERVICE REMOTE 1 TV SET STAGE SCREEN ADJUSTMENT CONVERGENCE ADJUSTMENTS NOTE Before attempting an...

Page 50: ...ZONTALLY AT CENTRE 2 VERTICAL LINERITY ADJUSTMENT V SLOPE SELECT V SLOPE ADJUST IT BY VOLUME UP DN KEY TO ADJUST CENTRE DOTTED LINE OF RETMA PATTERN TO THE TOP EDGE OF BLACK HALF PATTERN i e EXACTLY T...

Page 51: ...QUIT THE MANUFACTURING SERVICE MODE OSD ALIGNMENT ON NTSC PATTERN 2 SELECT COLOUR BAR CIRCLE PATTERN NTSC SYSTEM SELECT PARAMETER OSD V POS OSD H POS BY CHANNEL UP DN KEYS ADJUST THE PARAMETER VALUES...

Page 52: ...SET 1 1 CONNECT THE RF SIGNAL CORD TO TUNER 2 CHECK FOR VOLUME VARIATION FROM ZERO TO MAX FOR CH 02 CH 05 SOUND SHOULD BE DISTORTION FREE AT MAX VOLUME LEVEL 3 CHECK FOR HISSING SOUND DISTORTED SOUND...

Page 53: ...VICE REMOTE 4 FOR NTSC ALIGNMENTS 1 SELECT NTSC PATTERN COLOR BAR CIRCLE PATTERN 2 PRESS MENU 6483 KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE THEN PRESS HOTKEY 1 TO ENABLE MENU 1 1 HORIZONTAL CENT...

Page 54: ...TRAST BRIGHTNESS COLOUR SHARPNESS 9 CHECK FOR ALL BANDS TUNING WITH THEIR RESPECTIVE SOUND 10 CHECK FOR WHITE BALANCE TILT ALIGNMENT COLOUR PATCH 11 CHECK FOR SELECTABLE PICTURE MODES AS STANDARD DYNA...

Page 55: ...gomma 6x22x3mm 4 n FA LOC 1100001920 27 3 3 colla per rondelle 0 5 g FA LOC 1400000138 28 3 3 cinescopio 14 generico yammato 1 n vedi tab vedi tabella p 2 vedi tabella 29 3 3 vite per fissaggio cinesc...

Page 56: ...usta TV polietilene 850x800 mm 1 n LOCAL 1300000388 68 3 3 polistirolo per imballo inferiore dx e sx 1 n LOCAL 1300000720 B 69 3 3 polistirolo per imballo superiore dx e sx 1 n LOCAL 1300000720 T 70 3...

Page 57: ...critte 1 n LOCAL 1500009000 28 4 4 pannello decor non verniciato 1 n FA 1200004822 29 5 5 plastica grezza x g LOCAL 1500004001 30 4 4 vernice x g LOCAL 1500002000 31 4 4 inchiostro per scritte 0 03 g...

Page 58: ...L 1300000385 73 1 1 Scatola imballo TV 1 n 74 3 3 scatola imballo piana 2050KT 1 n LOCAL 1300001356 75 3 3 busta TV polietilene 1100x1050 mm 1 n LOCAL 1300000386 76 3 3 polistirolo per imballo inferio...

Page 59: ...itte 1 n LOCAL 1500009000 28 4 4 pannello decor non verniciato 1 n FA 1200004822 29 5 5 plastica grezza x g LOCAL 1500004001 30 4 4 vernice x g LOCAL 1500002000 31 4 4 inchiostro per scritte 0 03 g LO...

Page 60: ...00000385 73 1 1 Scatola imballo TV 1 n 74 3 3 scatola imballo piana 2150KT 1 n LOCAL 1300001357 75 3 3 busta TV polietilene e schiuma 1100x1050 mm 1 n LOCAL 1300000386 76 3 3 polistirolo per imballo i...

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