color television service manual chassis: - ve01
Contents
1. Connector scart Stereo and pseudo stereo effects Audio surround decoder can be added externally To general purpose out put port 21 PINNING TDA 9859 Pin no Pin Pin Description Stand By Voltage 1 AV Left input Scart Input Left Low Level 0 32V Channel High Level 3 8V P 1 Not connected Port 1 Input 0 MAIN Left Main Input Left Low Level OV Channel High Level 3 8V 4 CSMO Smoothing Capacitor Low Level 0 02V of reference voltage High Level 8V 5 MAIN Right Main Input Right Low Level 0V Channel High Level 3 8V 6 VCC Supply Voltage Low Level 0 02V High Level 8V 7 AUDIO OUT Right Scart Out put right Low Level 0 05V Channel High Level 3 8V GND Ground 0 19 VO Main Out put Right LowLevel 0 17V Channel High Level 3 8V 10 VI 8 Input to Loud Speaker Low Level 0 16V Channel High Level 3 8V 11 CBR 1 Bass Capacitor Low Level 0 15V Connection 1 Right High Level 3 8V Channel 12 CBR 2 Bass Capacitor Low Level 0 14V Connection 2 Right High Level 3 8V Channel 13 Woofer out Woofer Out Right 0 Right N C 14 CTR Treble Capacitor Low Level 0V Connection right CH High Level 3 8V 15 MAIN OUT Right Loud Speaker Output Low Level 0V Right Channel High Level 3 8V 22 16 SCL Serial Clock Input Low Level 2 54V High Level 2 55V 17 SDA Serial Data Ip Out2. IN SETTINGS MENU IS NORMAL AND SELECTABLE PICTURE MODE IS STANDARD ENSURE THAT THE MODEL NAME DISPLAYED IN MODEL INFORMATION WINDOW IS CORRECT TV SET WILL STOP IN FRONT OF CAMERA SENSOR CONNECT WHITE BALANCE SIGNAL FROM WHITE BALANCE TESTER TO TUNER INPUT OF SET 3 AUTO DEGAUSSING WILL START OBSERVE THAT WHILE DEGAUSSING MONITOR DISPLAY WILL APPEAR VIBRATING AFTER DEGAUSSING SENSOR WILL COME FORWARD TILL IT JUST TOUCHES TO SCREEN 4 ENSURE THAT THE SET POSITION IS SUCH THAT SCREEN WILL BE IN FRONT OF SENSOR AS WELL AS NEAR TOIT TAKE CARE THAT NO OSD WILL BE IN FRONT OF SENSOR SO THAT IT WILL NOT GET SENSED BY SENSOR WHILE TESTING AND ADJUSTMENT OF WHITE BALANCE 5 PRESS MENU 6483 KEY AND HOTKEY 3 SELECT SERVICE PARAMETERS FOR RGB CUTOFF 7 ADJUSTMENT amp ADJUST IT BY VOL UP VOL DN KEYS IF NEEDED ADJUST THE VALUES FOR PARAMETERS OF RGB DRIVES 6 IF NECESSARY ADJUST THE SUB BRIGHTNESS VALUE BY SELECTING APPROPREATE SERVICE PARAMETER 7 THE ADJUSTMENTS ARE MUTUALLY INTERDEPENDENT SO ADJUST ALL ABOVE MENTIONED PARAMETERS TILL THE RED BLC BAR COMES AT CENTRE AND NG DISPLAY TURNS IN TO GOOD SERVICE PARAMETERS SPECIFICATIONS RGB CUTOFF S FOR ALL OTHER BRANDS UOC VX05T PIMOC POC ROADSTAR TSB2 VX04T DSPM2129 X 275 5 RDC CR y 292 5 GDC GD GD G CUTI GDC CG FOR LOW BEAM Y 15 BDC BD BD CUTI BDC CB FOR HIGH BEAM 11
3. 28 DESIGN PRAMETERS MENU 5 Parameter Variation Default Setting PP Mode Std dynamic mild Brightness 0 100 75 75 75 Contrast 0 100 75 100 50 Color 0 100 50 50 50 Sharpness 0 100 50 50 50 SC 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 Variation Default Setting OSO 0 1 1 AGC SPEED 0 3 1 FFI 0 1 0 FSL 0 1 0 FMWS 0 1 0 HP2 0 1 0 RPO 0 1 1 NTSC MATRIX JAPAN U S USA VOL PIN OPEN DRAIN PUSH OPEN DRAIN PULL VIDEO OUT IF CVBS IF 29 DESIGN PRAMETERS MENU 7 Parameter Variation Default Setting IF 38 9 38 58 75 45 75 38 9MHZ DK OFF ON ON BG OFF ON ON M OFF ON OFF SIF PRIORITY DK I M BG BG AV2 OFF ON OFF SVHS OFF ON ON YUV OFF 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 15 DESIGN PRAMETERS MENU 8 Parameter Variation Default Setting CATHOD LEVEL 0 15 4 UOC VOLUME OFF ON OFF FM ATT 0 63 50 TDA 9874 AVL 0 3 1 TDA 9874 0 30 15 DUAL OUT OFF ON OFF AUTO SOUND OFF ON ON HEADPHONE 0 3 0 TRU BASS 0 1 0 DEFA
4. R2 VIN cw INSSW2 VDRB PARET a coi AUDEEM A 0826 MIZIC MIZISCI DECSDEM fSIF2 EHTO 0550 FROM X5231 n 8 SNDPLL FBISO SIF AGC AVL REFO van 25 1674 R229 R24 33 Toon Aurei aL C202 MTZISCI 10u 50V EN 1478040 607A TQ s ATOp AC 400 gt lt Bo Z 9 8 e 8 I T611 470p 1KV an C603 0605 1602 mE TE a m RGPISD I szopni I 56 un 0033u I 1o0u 35V is 79 L PS601 1 2W047 2200u 2sV we PIOKIBOM 33 am Vosa 1F 033 nes N656 ra gt am R531 RGP10D I 1 W047 d KA7805 Wi sen A vases cea ens T 220K cen 4 Hz3C2 M A RGPISD 1000u 16V MO _ con ss 1 oma cm NS voss my 2 vost dis 1 T RGP10D C656 0201 5 I T3 ASAUAC250V unv m 4 ven I d 2501651 I 465 Rea 2 047 N 1511 f I
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6. KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE THEN PRESS HOTKEY 1 TO ENABLE MENU 1 1 HORIZONTAL CENTERING H SHIFT SELECT PARAMETER H SHIFT BY USING CHANNEL DOWN KEY ADJUST H SHIFT VALUE BY USING VOLUME UP DN KEYS SUCH THAT THE PATTERN IS LOCATED HORIZONTALLY AT CENTRE 2 VERTICAL LINERITY ADJUSTMENT V SLOPE SELECT V SLOPE amp ADJUST IT BY VOLUME UP DN KEY SUCH THAT EXACTLY THE TOP HALF PORTION OF RETMA PATTERN IS VISIBLE 3 VERTICAL RASTER SHIFT V SHIFT SELECT V SHIFT AND ADJUST IT SUCH THAT PATTERN WILL APPEAR AT MECHANICAL CENTRE OF THE PICTURE TUBE 4 VERTICAL HEIGHT V SIZE SELECT V SIZE AND ADJUST IT SUCH THAT HEIGHT OF THE LION HEAD PATTERN BECOMES 9 9 ACCEPTABLE RANGE IS 8 9 TO 9 1 REFER FIG 5 VERTICAL SCROLL V SC SELECT V SC AND ADJUST IT SUCH THAT BIG CIRCLE WILL LOOK PERFECT CIRCLE RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR NSTOCK NO LOC DESCRIPTION QPS REMOTE H SET 1 TV SET 1 MONITOR av out SET 2 AV CORDS CHECKED BY 3 monitor av in tv set CONNECT THE RF SIGNAL CORD TO TUNNER SELECT CHANNEL EU 2CH AV IN CHECKING KEEP MONITOR SET IN TV MODE AND TESTING TV SET IN EURO AV MODE BY USING TV AV KEY ON REMOTE CHANNEL EU 2CH IS SELECTED IN MONITOR TV SET CONNECT VIDEO OUT AND AUDIO OUT CORD OF MONITOR SET TO VIDEO IN AND AUDIO IN JACKS OF TESTING TV SET LISTEN FOR NORMAL SOUND AND PICTURE OF CHANNEL EU 2CH PRESENT IN
7. v THIS SYMBOL INDICATES THE LOCATION OF FOCUS ADJUSTMENT CHECK ON SCREEN CONVERGENCE ADJUSTMENT 1 SWITCH OVER TO CROSS HATCH PATTERN 2 BY TURNING THE 4 POLE MAGNET MATCH THE RED AND BLUE LINES AT THE CENTRE SHIFT THE RED AND BLUE LINE OVER THE GREEN LINE BY USING 6 POLE MAGNET 3 TIGHTEN THE CPM LOCK BE CAREFUL NOT TO MOVE THE OTHER RINGS MAGNETS AT THIS TIME 4 CHECK AND ADJUST THE PICTURE FOR TILT ADJUST THE TILT BY ADJUSTING THE YOKE 5 APPLY GLUE ON BOTH SCREEN AND FOCUS KNOB OF FBT AFTER ADJUSTMENT OF FOCUS THIS HORIZONTAL LINE MATCHING WITH EXPOSURE POINTS THIS HORIZONTAL LINE MATCHING WITH EXPOSURE POINTS EXPOSURE POINTS ON THE SCREEN EXPOSURE POINTS ON THE SCREEN FOR TFT CPT MODELS TILT 0 mm TILT CHECK FOR CONVENTIONAL CPT MODELS TILT 2 mm FOCUS CHECK NOTE DO NOT TOUCH TO ANY PART OF FBT RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SRNSTOCKNO Loc bEscRIPTION QPS SERVICE REMOTE 1 TV SET CONVERGENCE ADJUSTMENTS NOTE Before attempting any convergence adjustments the CIRCUMFERENCE CONVERGENCE ADJUSTMENT receiver should be operated for at leat fifteen minutes CENTER CONVERGENCE ADJUSTMENT 1 Select the Cross hatch pattern EU 4CH 2 Set the brightness and contrast for well defined pattern 3 Adjust two tabs of the 4 Pole magnets to change the angle between them See fig 01 amp 02 and superimpose red a
8. 14V input 1 29 DECSDEM SIF2 Decoupling sound 2 23V demodulator or SIF input2 30 GND2 Ground 2 for TV processor 0V 31 SNDPLL SIF AGC Narrow band PLL filter 2 23V AGC sound IF 32 AVL REFO Automatic Volume OV Levelling sound IF input subcarrier reference output AM output 33 H OUT Horizontal output 0 53V 34 FBISO Flyback input sandcastle 0 67V output 35 AUDEXT QSSO External audio input QSS 3 64V intercarrier out AM audio output non controlled 36 EHTO EHT Over voltage Low level OV protection input High Level 1 6V 16 37 PLL IF IF PLL loop filter Low level 0V High Level 2 35V 38 IFVO SVO IF video output selected 3 27V CVBS output 39 Vp1 Main supply voltage TV 8V processor 8 V 40 CVBSINT Internal CVBS input 2VPP 41 GND1 Ground 1 for TV processor 0V 42 CVBS Y External CVBS Y input Low level OV High Level 3 3V 43 CHROMA Chrominance input Low level OV SVHS High Level 3 3V 44 AUDOUT AMOUT Audio output AM audio 3 31V output volume controlled 45 INSSW2 2nd RGB YUV insertion OV input 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 Y input 2 49V 49 BCLIN Beam current limiter 1 95 V input V guard input 50 BLANKING Black current input 3V 51 ROUT Red output 2Vpp 52 GOUT Green output 2Vpp 53 BOUT Blue
9. 31V 3 SDA Data Out put Low Level 0V High Level 3 31V 4 TUNING Tunning Not connected 5 NTSC SW AC TEST NTSC switch AC Test OV 6 KEY Key Input Pannel Low Level 3 36V High level 3 48V 7 VOL1 Volume 3 3 V 8 MUTE Mute Low level OV High Level 4 06 9 Vss Digital Ground for OV microcontroller 10 BAND1 Band 1 not connected 0V 11 BAND2 Band 2 Not Connected OV 12 Vss Analog ground of teletext OV decoder and digital ground for TV processor 13 SECPLL Secam PLL decoupler Low level OV High level 2 27 14 Vp2 Second supply voltage for 8V TV processor 15 DECDIG Decoupling digital supply Low level OV of TV processor High level 4 98V 16 PHL2LF Phase ll filter Low level OV High level 2 88V 17 PHL2LF Phase filter Low level OV High Level 3V 15 18 GND3 Ground for TV processor 0V 19 DECBG Band gap decoupling 3 97 V 20 AVL EWD Automatic volume leveling Low level 0 East west drive output High level 2 61V 21 VDRB vertical drive B output 0 59V 22 VDRA vertical drive A output 0 61 23 IF 1 IF input 1 1 85V 24 IF2 IF input 2 1 85V 25 IREF Reference current input 3 97V 26 VSC Vertical sawtooth capacitor Low level 0V high level 3 65V 27 TUNER AGC Tuner AGC output Low level OV high level 3 93V 28 AUDDEM Audio de emphasis or SIF 3
10. 9V 5 SYNC Low Level 0 74V High Level 11V 11 VIDEO AMPLIFIER STAGE Transistorised amplifier circuit is used to amplify the R G B signal received from TDA9351 The R G B output from TDA9351 is applied to base of B911 B921 and B931 and push pull amplifier is used to amplify this signal further and applied to cathode of CRT Voltage details of 9 transistors used in video amplifier section are as follows 25 Transistor Base Voltage Collector Voltage Emitter Voltage B931 3 95 V 88 9V 3 35V B911 3 98V 87 1V 3 38V B921 4V 86 1V 3 42V V923 86V 6 8V 86 4V V932 88 7V 170 4V 89V V912 86 9V 175 2V 87 3V V913 87 1V 6 82V 87 4V V933 88 7V 6 83V 89V V922 85 9V 175V 86 2V 12 VE01 CHASSIS MANUAL ALIGNMENT PROCEDURE In order to enter in service menu and design menu following procedure needs to be followed N gt A S 7 F UOU N gt A SE S 12 Procedure to enter in service mode Press Menu Key on Remote Handset Press 6483 on remote handset M appears on the Screen Press 1234 set will enter into Service Mode To Change the value of parameter press Volume Volume Key To move from one parameter to another press Channel Channel Key on Remote Handset Press Stand By Key on remote handset to come out of Service Mode 12B Procedure to Enter Into Design Mode Press Menu Key on Remote Handset Press 6483 on remote
11. CHASSIS AL SHEET 1 OF 1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION SERVICE REMOTE 1 TV SET WHITE BALANCE INTRODUCTION TO WHITE BALANCE ADJUSTMENT WINDOW THIS INDICATES WHI BALANCE CONDITIO NG OR GOOD GREEN AND BLUE CUT OFF STATUS BARS GOOD MODEL MODEL x TARGET HIGH LIGHT 543805 x 275 5 TARGET VALUES WHITE BALANCE HIGH LIGHT REF LOW LIGHT REF GD y 292 5 TOLERANCE OF El 15 00 TARGET VALUES GREEN AND BLUE DRIVE STATUS BARS TARGET LOW LIGHT 275 5 SUB 292 L5 CONTRAST STATUS BAF HTNESS 1 00 TATUS BAF x PREWRITE 276 CURRENT STATUS ADJUST SP san manual B PRODUCT CTV STAGE WHITE BALANCE ADJUSTMENT PCB ASSY SHEET 20F2 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION QPS SERVICE REMOTE 1 TV SET 1 WHITE BALANCE METER NOTE WARM UP THE SET FOR LEAST 20 MINUTES DURING SOAKING AREA ENSURE
12. GEOMETRICAL ALIGNMENTS DISPLAY ALIGNMENTS HEIGHT amp WIDTH SHOULD BE HEAD PATTERN LION HEAD PATTERN SHOULD LOOK LINEAR AND SYMMETRICAL CHECK FOR FOCUS ADJUSTMENT AT DIAGONAL CENTRE OF PICTURE TUBE 30 DIGITS ON LION HEAD PATTERN SHOULD BE SHARP VISIBLE PRESS 200 KEY ON REMOTE TO SELECT 2 MODE AND CHECK THAT HEIGHT OF THE RETMA PATTERN IS SELECT WIDE MODE AND CHECK THAT PATTERN HEIGHT IS 75 OF THE SCREEN SELECT CROSS HATCH PATTERN EU 4CH AND CHECK FOR CONVERGENCE QUALITY HORIZONTAL AND VERTICAL LINES SHOULD BE WHITE CHECK FOR SUB BRIGHTNESS ON CHANNEL EU 2CH SUB BRIGHTNESS SHOULD BE SUCH THAT 58 1 2 BARS ON SUB BRIGHTNESS PATTERN WITH PICTURE MODE STANDARD ARE VISIBLE IF REQUIRED ADJUST PARAMETER SBI IN SERVICE MENU HOTKEY 3 FOR SPECIFIED SUB BRIGHTNESS ALIGNMENT CHECK THAT OSD DISPLAY IS NOT CUTTING ON COLOUR BAR CIRCLE PATTERN WHEN ZOOM MODE IS SELECTED CHECK FOR P CONTROL CONTRAST BRIGHTNESS COLOUR SHARPNESS CHECK FOR ALL BANDS TUNING WITH THEIR RESPECTIVE SOUND CHECK FOR WHITE BALANCE TILT ALIGNMENT amp COLOUR PATCH CHECK FOR SELECTABLE PICTURE MODES AS STANDARD DYNAMIC MILD USER CHECK CPT RELATED PROBLEMS SCRATCH CONVERGENCE DYNAMIC amp STATIC YOKE TILT CPT GAP OR TILT CHECK FOR RASTER COLLAPSE DURING SWITCH OFF CHECK FOR THE PROBLEMS SUCH AS DAMPING BAR BLOOMING RETRACE LINES STRAY EMISSION ETC FOR DETAILS PLEASE REFER USERS GUIDE BOOK PRODUCT CTV STAGE FEATU
13. PATTERN BECOMES 9 9 ACCEPTABLE RANGE IS 8 9 TO 9 1 REFER FIG 5 VERTICAL SCROLL V SC SELECT V SC AND ADJUST IT SUCH THAT BIG CIRCLE WILL LOOK PERFECT CIRCL USE STAND BY KEY TO QUIT THE MANUFACTURING SERVICE MODE LIOH HEAD PATTERH PRODUCT CTV STAGE OSD ALIGNMENT PCB ASSY F A SHEET 10F1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION SERVICE REMOTE 1 TV SET PRESS MENU 6483 KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE THEN PRESS HOTKEY 1 SELECT RETMA PATTERN EU 5CH OSD DISPLAY ADJUSTMENT VERTICAL AND HORIZONTAL OSDH AND OSDV SELECT SERVICE MENU 4 BY PRESSING HOTKEY 4 A BIG RECTANGLE WILL APPEAR ON SCREEN 1 SELECT OSD V POS BY CH DN KEY AND ADJUST DOTTED RECTANGLE AT THE VERTICAL CENTRE OF SCREEN 2 SELECT OSD H POS BY CH DN KEY AND ADJUST DOTTED RECTANGLE AT THE HORIZONTAL CENTRE OF SCREEN MEHU 4 OSD V POS OSD H POS USE STAND BY KEY TO QUIT THE MANUFACTURING SERVICE 4 HHBBEUHHEEEEHEH OSD ALIGNMENT ON NTSC PATTERN 2 SELECT COLOUR BAR CIRCLE PATTERN NTSC SYSTEM SELECT PARAMETER OSD V POS amp OSD H POS BY CHANNEL UP DN KEYS ADJUST THE PARAMETER VALUES SUCH THAT A BIG DOTTED RECTANGLE SHOULD BE SYMMETRICALLY LOCATED ON RETMA PATTERN PRODUCT CTV STAGE WHITE BALANCE ADJUSTMEN PCB ASSY F A
14. THE TESTING TV SET CHECK THE AUDIO FOR BOTH THE AUDIO IN JACKS AV OUT CHECKING KEEP MONITOR SET IN AV MODE AND TESTING TV SET IN TV MODE BY USING TV AV KEY ON REMOTE SELECT SUB BRIGHTNESS PATTERN EU 2CH ON TESTING TV SET CONNECT VIDEO IN AND AUDIO IN CORD OF MONITOR SET TO VIDEO OUT AND AUDIO OUT JACKS OF TESTING TV SET LISTEN FOR NORMAL SOUND AND PICTURE OF CHANNEL EU 2CH PRESENT IN THE MONITOR TV SET REMOVE THE AV CORDS AFTER TESTING CHECK CD PLAY ON OFF FUNCTION IN SOUND MENU O N akon PRODUCT CTV STAGE SOUND 2 PCB ASSY F A SHEET 10F1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SRN STOCK NO LOC DESCRIPTION 1 TV SET CONNECT THE RF SIGNAL CORD TO TUNER CHECK FOR VOLUME VARIATION FROM ZERO TO MAX FOR CH 02 amp CH 05 SOUND SHOULD BE DISTORTION FREE AT MAX VOLUME LEVEL CHECK FOR HISSING SOUND DISTORTED SOUND PROBLEMS CHECK SOUND MUTE AVL BANG THE CHASSIS FOR LOOSE CONTACT REMOVE THE RF SIGNAL CORD FROM TUNER FOR DETAILS PLEASE REFER USERS GUIDE BOOK SHOCK TEST 1 GENTLY HIT THE HAMMER ON TOP SIDE OF FRONT COVER CHECK FOR ANY ABNORMALITY RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION QPS 1 TV SET 1 SERVICE REMOTE 1 2 10 11 13 14 CONNECT RF SIGNAL CORD TO TUNER SELECT CHANNEL EU 5CH CHECK FOR
15. The chroma band pass and trap circuits including the SECAM cloche filter are realised by means of gyrators and are tuned to the right frequency by comparing the tuning frequency with the reference frequency of the colour decoder The luminance delay line and the delay cells for the peaking circuit are also realised with gyrators The circuit contains a black stretcher function which corrects the black level for incoming signals which have a difference between the black level and the blanking level 2A 7 COLOUR DECODER The IC can decode PAL NTSC and SECAM signals The PAL NTSC decoder does not need external reference crystals but has an internal clock generator which is stabilised to the required frequency by using the 12 MHz clock signal from the reference oscillator of the micro controller Teletext decoder Under 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 to overrule the colour killer by forcing the colour decoder to the required standard and to activate the FCO bit Forced Colour On in subaddress 21H The Automatic Colour Limiting ACL circuit switchable via the ACL bit in subaddress 20H prevents that over saturation occurs when signals with a high chroma to burst ratio are received The ACL circuit is designed such that it only reduces the chroma signal and not the burst signal This
16. be made with respect to the level which is generated by the black current stabilization system In this 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 whether the black level of the highest output is in a certain window WBC bit or below or above this window HBC bit This indication can be read from the status byte 01 and can be used for automatic adjustment of the Vg2 voltage during the production of the TV receiver During switch off of the TV receiver a fixed beam current is generated by the black current control circuit This current ensures that the picture tube capacitance is discharged During the switch off period the vertical deflection is placed in an overscan position so that the discharge is not visible on the screen 2B MICROCONTROLLER WITH TELETEX DECODER The integrated teletex decoder with embedded microcontroller is a control system designed for TV sets with analogue picture and sound control The system also offers an on screen display OSD and IR remote control of all functions 3 TUNER GDC Tuner EWT 5F3T1 is controlled by I2C bus through IC TDA 9361 The tuning is based on frequency synthesis tunning CHANNEL COVERAGE BAND OFF AIR CHANELS CHANEL RANGE FREQUENCY IN MHZ LOW BAND E2 S9 48 25 161 25 MID BAND 510 541 168 25 463 25 HIGH BA
17. handset M appears on the Screen Press 5 on remote handset Press Lock key on remote handset set will enter into Design Mode 26 6 To Change the value of parameter press Volume Volume Key To move from one parameter to another press Channel Channel Key on Remote Handset 7 Press Stand By Key to come out of Design Mode e 12C White Balance Adjustment In Field 1 Select R G B cut off parameter in Menu 3 of service mode and adjust these parameters Standard settings of these parameters are RD 32 GD 32 BD 32 2 Select the RGB drive parameters RB GB in menu 3 and adjust this parameter Default setting of these parameter is RB 32 GB 32 3 Select Sub brightness parameter SB in menu 3 and adjust to get proper white balance The default value of SB 40 e 12D Screen Adjustment In Field 1 Select parameter SC in menu 3 of service mode 2 Increase the 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 horizontal line is just visible 12E OTHER SERVICE MODE ADJUSTMENTS can be done by entering into service mode by applying the suggested procedure and setting the default value mentioned below Few cases defaults values can be changed in a small variation for customer satisfaction SERVICE PRAMETERS MENU 1 Parameter Variat
18. has the advantage that the colour sensitivity is not affected by this function The SECAM decoder contains an auto calibrating PLL demodulator which has two references viz the divided 12 MHz reference frequency obtained from the microcontroller which is used to tune the PLL to the desired free running frequency and the bandgap reference to obtain the correct absolute value of the output signal The VCO of the PLL is calibrated during each vertical blanking period when the IC is in search or SECAM mode The base band delay line TDA 4665 function is integrated This delay line is also active during NTSC to obtain a good suppression of cross colour effects The demodulated colour difference signals are internally supplied to the delay line 2A 8 RGB OUTPUT CIRCUIT AND BLACK CURRENT STABILIZATION In the RGB control circuit the signal is controlled on contrast brightness and saturation The ICs have a linear input for external RGB signals It is possible to use this input for the insertion of YUV signals Switching between RGB and YUV can be realised via the YUV bit in subaddress 2BH The signals for OSD and text are internally supplied to the control circuit The output signal has an amplitude of about 2 Volts black to white at nominal input signals and nominal settings of the various controls To obtain an accurate biasing of the picture tube the Continuous Cathode Calibration system has been included in these ICs A black level offset can
19. overall convergence Tighten the screw firmly to fix the yoke and check the yoke is firm 9 stick three adhesive tapes on wedges as shown in fig o Convergence Adjustment 20F2 PREPARED BY Screw to Tighten CPM CHECKED BY Assy keep the angle constant Convergence magnets of CPM Assy 4 Pole Magnets Movement 6 Pole Magnets Movement Center Convergence By Convergence Magnets INCLINE THE YOKE UP OR DOWH INCLINE THE YOKE RIGHT OR LEFT Circumference Convergence By Deflection Yoke RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SRN STOCKNO __ LOC DESCRIPTION QPS pes ETUR REMOTE 1 1 SELECT RETMA PATTERN EU 5CH PRESS MENU 6483 KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE THEN PRESS HOTKEY 1 TO ACCESS SERVICE MENU 1 1 HORIZONTAL CENTERING H SHIFT SELECT PARAMETER H SHIFT BY USING CHANNEL DOWN KEY ADJUST H SHIFT VALUE BY USING VOLUME UP DN KEYS SUCH THAT THE PATTERN IS LOCATED HORIZONTALLY AT CENTRE 2 VERTICAL LINERITY ADJUSTMENT V SLOPE SELECT V SLOPE amp 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 THE TOP HALF PORTION OF RETMA PATTERN IS VISIBLE 3 VERTICAL RASTER SHIFT V SHIFT SELECT V SHIFT AND ADJUST IT SUCH THAT PATTERN WILL APPEAR AT MECHANICAL CENTRE OF THE PICTURE TUBE 4 VERTICAL HEIGHT V SIZE SELECT V SIZE AND ADJUST IT SUCH THAT HEIGHT OF THE LION HEAD
20. 3 RGB DRIVES GDRV GB GB GDRV GDRV WG FOR TOSHIBA BRAND BDRV RB RB BDRV BDRV WB X 260 SUB BRIGHTNESS y 271 SBRT BBR SUB BRI BRTS BRTC SB FOR LOW BEAM Y 5 USE STAND BY KEY TO QUIT THE MANUFACTURING SERVICE MODE FOR HIGH BEAM Y 99 PRODUCT CIV RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION TV SET CONNECT THE RF SIGNAL CORD TO TUNER CHECK FOR VOLUME VARIATION FROM ZERO TO MAX FOR CH 02 amp CH 05 SOUND SHOULD BE DISTORTION FREE AT MAX VOLUME LEVEL CHECK FOR HISSING SOUND DISTORTED SOUND PROBLEMS CHECK SOUND MUTE AVL BANG THE CHASSIS FOR LOOSE CONTACT REMOVE THE RF SIGNAL CORD FROM TUNER FOR DETAILS PLEASE REFER USERS GUIDE BOOK RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 LOC DESCRIPTION QPS 1 TV SET 1 SERVICE REMOTE 2 EXT DEGAUSSING COIL CHECKED BY 1 CONNECT RF SIGNAL CORD TO TUNER 2 SELECT CHANNEL EU 5CH CHECK FOR GEOMETRICAL ALIGNMENTS DISPLAY ALIGNMENTS HEIGHT amp WIDTH SHOULD BE 10 11 12 13 14 HEAD PATTERN LION HEAD PATTERN SHOULD LOOK LINEAR AND SYMMETRICAL CHECK FOR FOCUS ADJUSTMENT AT DIAGONAL CENTRE OF PICTURE TUBE 30 DIGITS ON LION HEAD PATTERN SHOULD BE SHARP VISIBLE PRESS ZOOM I KEY ON REMOTE TO SELECT ZOOM MODE AND CHECK THAT HEIGHT OF THE RETMA PATTERN IS SELECT WIDE MODE AND CHECK THAT PATTERN HEIGHT IS 75 OF THE SCREEN S
21. 7V Ground for channel out OV Chanel out Low Level OV High Level 6V 5 Standby Signal Input Low Level OV High Level 5V 6 Channel 1 input Low Level OV High Level 1 44V Ground OV 8 Channel 2 input Low Level OV High Level 1 44V 9 Volume 2 8V 10 Channel 2 out put Low Level 0V High Level 6V 11 Ground for channel 2 OV 12 Channel 2 out put Low Level OV High Level 6V 11G STR 5Q0765 The 5QO765RT is a power switch and an enhanced high performance controller This power switch consists of high voltage power sensitivity and PWM controller IC PWM Controller features integerated fixed oscillator under voltage lock out leading edge blanking optimized gate turn off drivers thermal shut down protection over voltage protection It has a basic platform well suited for cost effective 24 design in CTV power supply With this features it offers really safe and reliable power management Features Quasi resonant convertor controller e Internal bus mode controller e Pulse by pulse current limiting e Over current latch protection e Over Voltage protection V Sink Min 11 Volt e Internal thermal Shut Down function e Under Voltage lock out e Internal High Voltage sensitivity e Auto restart mode PINNING STR 5Q0765 Pin No Description Voltage in Volts 1 Drain 300 V 2 Ground 0 3 Low level 12 59V High level 40V 4 Feedback Low level 0 3 V High level 6
22. AUTIONS e Do not change any module unless the set is switched off e The mains supply side of the SMPS transformer is live Use an isolating transformer e Servicing of the CTV set should only be carried out by qualified person e Components marked with warning symbol on circuit diagram are critical for safety and must only be replaced with an identical component e Power resistor and fusable resistors must be mounted in an identical manner to the original component e Discharge the capacitors like Main Filter when working on these Do not solder when the set is on Do not connect any external device like Speakers etc when the set is on e When any signals are to be connected disconnected switch off the set e Wear rubber shoes non conducting so that your body does not become a passage for electric current INTRODUCTION VEO1 chassis is capable of driving 14 20 21 21 tubes at appropriate currents This chassis is capable of working in the PAL SECAM NTSC systems The sound system is capable of giving 1 5W r m s output into a load 8E speaker One page simple TELETEXT TOPTEXT and FASTEXT is provided The chassis is equipped with 21 pin scart connector which can accept via scart the SVHS format from VCRs The details of various sections with IC details and pin voltages are covered in this manual The alignment procedure in field and also at manufacturing line is also covered in detail The block diagram circ
23. BP 18 19 11 STV9302A 292 292 2222 LLL 19 20 11D IC AT24C16 20 21 11E TDA9859 21 23 11F AN17821 24 11G STR5Q0765 24 25 11H Video Amplifier Transistors 25 26 12 Alignment Procedures 26 12 A Procedure to enter Service Mode 26 12 B Procedure to enter Design Mode 26 12 C White Balance Adjustment 27 12 D Screen Adjustment 27 12 E Design and Service data adjustment 27 31 12 F Manufacturing and alignment procedures 32 42 13 Block 43 14 Circuit Diagram 44 15 Track Side Layout 45 SAFETY PREC
24. COLOR TELEVISION SERVICE MANUAL CHASSIS VE01 MODEL NO 1450KT 2050KT 2150KT Roadst A PCI ar CONTENTS Safety PrecautionS 3 Introduction 3 1 SCART details 4 2 Micro Controller and Small Signal function gt TDA9351 5 8 3 9 4 Video Switch HEF4052BP 10 5 Sound Processor gt TDA9859 10 6 Sound Output gt AN1 7821 10 7 Vertical Output Stage gt STV9302A 10 8 Video Output Amplifier 11 9 Power Supply 11 10 Memory IC gt AT24C16 11 11 IC Description with Pin Details 12 11A 9351 12 18 11B HEF4052
25. ELECT CROSS HATCH PATTERN EU 4CH AND CHECK FOR CONVERGENCE QUALITY HORIZONTAL AND VERTICAL LINES SHOULD BE WHITE CHECK FOR SUB BRIGHTNESS ON CHANNEL EU 2CH SUB BRIGHTNESS SHOULD BE SUCH THAT 58 1 2 BARS ON SUB BRIGHTNESS PATTERN WITH PICTURE MODE STANDARD ARE VISIBLE IF REQUIRED ADJUST PARAMETER SB IN SERVICE MENU HOTKEY 3 FOR SPECIFIED SUB BRIGHTNESS ALIGNMENT CHECK THAT OSD DISPLAY IS NOT CUTTING ON COLOUR BAR CIRCLE PATTERN WHEN ZOOM MODE IS SELECTED CHECK FOR P CONTROL CONTRAST BRIGHTNESS COLOUR SHARPNESS CHECK FOR ALL BANDS TUNING WITH THEIR RESPECTIVE SOUND CHECK FOR WHITE BALANCE TILT ALIGNMENT amp COLOUR PATCH CHECK FOR SELECTABLE PICTURE MODES AS STANDARD DYNAMIC MILD USER CHECK CPT RELATED PROBLEMS SCRATCH CONVERGENCE DYNAMIC amp STATIC YOKE TILT CPT GAP OR TILT CHECK FOR RASTER COLLAPSE DURING SWITCH OFF CHECK FOR THE PROBLEMS SUCH AS DAMPING BAR BLOOMING RETRACE LINES STRAY EMISSION ETC FOR DETAILS PLEASE REFER USERS GUIDE BOOK USE STAND BY KEY TO QUIT THE MANUFACTURING SERVICE MODE PRODUCT CTV STAGE TELETEXT CHECKINC PCB ASSY F A CHASSIS SHEET 1 OF 1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION QPS 1 TV SET 1 REMOTE TELETEXT CHECKING SELECT COLOUR BAR PATTERN PRESS TXT MIX KEY ON REMOTE 1 OBSERVE THAT P100 INDEX PAGE OF TELETEXT HAS APPEARED PRESS TXT MIX KEY AGAIN AND OBSERVE THAT
26. MABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION QPS SERVICE REMOTE 1 1 BEFORE SWITCHING ON THE TV SET CHECK THAT CHASSIS DOCKING AND HARNESING HAVE DONE PROPERLY OR NOT CHECK THAT DEGAUSSING CONNECTOR HAS CONNECTED CONNECT RF SIGNAL TO TUNER SWITCH ON THE TV SET AND ADJUST THE SCREEN AND FOCUS POT OF FBT FOR CLEAR PICTURE CHECK THAT POWER ON LED IS GLOWING WITH NORMAL INTENSITY CHECK POWER ON OFF SWITCH OPERATION BY SWITCHING THE SWITCH ON OFF TWO TO THREE TIMES CHECK FOR THE PROBLEMS LIKE CPT GAP SWITCH OFF SPOT STRAY EMISSION ETC SELECT CHANNEL EU 2CH AND CHECK THAT SUB BRIGHTNESS PATTERN HAS APPEARED CHECK FOR CHANNEL TUNNING ELSE TUNE THE PROGRAMS USING AUTO SEARCH IN SEARCH MENU CHECK THE VOLUME VARIATION FROM ZERO TO MAXIMUM OBSERVE THAT VARIATION IS NOT INTERMITANT IT SHOULD BE CHECK THE OPERATION OF CH UP CH DN VOL UP VOL DN MENU KEYS CHECK THAT THESE KEYS ARE NOT HARD TO OPERATE CHECK THE TV SET ASTHETICALLY PRODUCT CTV STAGE B VOLTAGE ALIGNMENT PCB ASSY F A SHEET 10F1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS SRN PREPARED BY STOCK NO LOC DESCRIPTION QPS DIGITAL PANEL METER TV SET 1 ALIGNER SWITCH ON THE SET CONNECT THE RF CORD TO TUNER SELECT THE STANDARD MODE OF PICTURE CONTROL CONNECT THE DPM POSITIVE PROBE TO CATHODE OF DIODE VD631 DPM NEGATIVE PROBE IS INTERNALLY CONNECTED TO CHA
27. N 2A 1 VISION IF ANPLIFIER The vision IF amplifier can demodulate signals with positive and negative modulation The PLL demodulator is completely alignment free The VCO of the PLL circuit is internal and the frequency is fixed to the required value by using the clock frequency of the Controller Teletext decoder as a reference The setting of the various frequencies 38 38 9 45 75 and 58 75 MHz can be made via the control bits IFA IFC in sub address 27H Because of the internal VCO the IF circuit has a high immunity to EMC interferences 2A 2 VIDEO SWITCHES The video switch has one input for an external CVBS or Y C signal The selected CVBS signal can be supplied to pin 38 the IF video output The selection 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 circuit is independent of the synchronisation and can be used to switch the time constant of the horizontal PLL depending on the presence of a video signal via the VID bit Because of the availability of the Y C input and the subcarrier output an external comb filter can be applied In that case an external video switch or comb filter with integrated switch must be used The subcarrier output is combined with a 3 level output switch 0 V 4 V and 8 V The output level and the availability of the subcarrier signal is controlled by the CMB1 a
28. ND E21 E69 471 25 855 25 4 VIDEO SWITCH BU 4052 The HEF4052 is a dual four channel analog multiplexer The main function of this device is to accept an AV input from SCART external AV and switch the required output at pin no Z which is applied to small signal processing IC 5 SOUND PROCESSOR TDA 9859 is designed to perform demodulation of FM TV sound The TDA 9859 selects signal from Three Stereo Sources or Six Mono Sources and out put can be given to scart The sound processor is 2 bus controlled and all settings of bus are stored in sub address register 6 SOUND OUTPUT IC AN17821 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 delivered into an 8 Ohm Load This IC is also having a feature of auto volume controller Similarly stand by signal coming from microcontroller is used to disable the sound out put from speaker 7 VERTICLE OUTPUT STAGE The STV 9302 is a vertical deflection circuit can be used for 90 degree and 110 degree deflection systems One supply voltage for the scan is required The drive voltage is amplified by an amplifier The supply voltage of this IC is 15 Volts 8 VIDEO OUTPUT AMPLIFIER The RBG output signal from TDA 9351 is applied to video output amplifier section IC TDA6107 or transistorized circuit can be used for video signal ampli
29. PING OPTION AND PRESS VOL UP KEY AFTER SIPPING TV SET WILL SWITCH AGAIN MAKE THE MAINS POWER SWITCH OFF USE STAND BY KEY TO QUIT THE MANUFACTURING SERVICE MODE VILEUR UOC STEREO SCH 2005 10 10 d veo A51JSY61X03 CH2OUT GND CH2out 5 102 3 sispay 3 voume ann cain 9 0 09 E E AT24C16 Bi arnev sa N301 191 niga TDA9361 160 10u 16V cao 8157 STAND OY 100u 16V 270K 5212 Mar p 2SA1015 TUNING 72 gt 142 2SC1815 NTSC SW 144148 n f oe C9ss a xs ACTEST 104 250 GND 1 cn FROM XS701 KEY XTAL OUT s T 10u 250V 300 XTALIN R2 10K 1N4148 47 XP2001 OSCGND cns 10u 16V VpE CVBSINT Cass tns 2 25 1815 TUNER AGC iu A ac Bee Lt 470p T 10 SECPLL m aem EIS ROUT IN Tar TDA9859 I Lara jt gr anna DECDIG BLANKING vost cen N R22 m fp caw e BCLIN 2200p R301 15K GIN Hi z
30. RE CHECKINC PCB ASSY F A SHEET 10F1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SRN STOCK NO LOC DESCRIPTION QPS 1 TV SET 1 REMOTE NOOR O N SWITCH ON THE SET SELECT FOLLOWING FUNCTIONS SELECT SETTINGS MENU AND CHECK EURO AV FOR Y C RGB VIDEO OPTIONS IN SETTINGS MENU CHECK TONE NORMAL WARM COOL CHECK BLACK STRETCH IN SETTINGS MENU BRIGHTNESS INCREASES WHEN BLACK STRETCH IS OFF SELECT TIMER MENU AND CHECK THAT ON TIMER OFF TIMER REPEAT SETTINGS ARE AVAILABLE SELECT SETTINGS LANGUAGE MENU AND CHECK THAT 18 DIFFERENT LANGUAGES ARE AVAILABLE INCLUDING ENGLISH IN SETTINGS MENU CHECK BLUE SCREEN ON OFF CHECK THIS FEATURE WITHOUT RF SIGNAL LOCK FUNCTION PRESS LOCK KEY FOR 4 SECOND TO ACTIVATE LOCK FUNCTION CHECK THAT LOCK MENU WITH DIFF LC ARE AVAILABLE REVEAL amp HOLD PRESS REVEAL KEY CHECK THAT TV SWITCHES TO ALL THE TUNNED PROGRAMS AND EURO AV MODE S AND STOPS AT THE PROGRAM TO WHICH HOLD KEY IS PRESSED FOR DETAILS PLEASE REFER USER S GUIDE BOOK PESB CT CTV STAGE SHIPPING PCB ASSY F A SHEET 10F1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SRN STOCK NO LOC DESCRIPTION QPS SERVICE REMOTE 1 TV SET 1 O N CHECK THE SET IN ALL ASPECTS PRESS MENU 6483 KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE THEN PRESS HOTKEY 2 TO ENABLE MENU 2 SELECT SHIP
31. SSIS GROUND ROTATE THE PRESET VR 631 USING ALIGNER TO SET B VOLTAGE 115V 0 5V DC PRODUCT CTV STAGE SCREEN ADJUSTMENT PCB ASSY FA SHEET 10F1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY QPS SERVICE REMOTE SR 5 NO LOC DESCRIPTION TV SET 1 FEVIBONAD INSULATED SCREW CHECKED BY DRIVER NOTE WARM UP THE TV SET FOR AT LEAST 20 MINUTES DURING SOAKING AREA SELECT DIGITAL LION HEAD PATTERN PRESS MENU 6483 KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE PRESS KEY 3 TO APPEAR SERVICE MENU 3 ON SCREEN SELECT PARAMETER SC BY PRESSING CHANNEL UP DN KEY PRESS VOL UP KEY THEN A THIN HORIZONTAL LINE WILL BE DISPLAYED ON SCREEN ADJUST THE SCREEN INTENSITY BY VARYING SCREEN POT OF FBT USING INSULATED SCREW DRIVER UNTIL A THIN HORIZOI LINE IS JUST VISIBLE 7 PRESS VOL DN KEY TO APPEAR ORIGINAL PATTERN 8 APPLY THE FEVIBOND ON SCREEN OF FBT oo SHEET_ 10F 1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SRN STOCKNO LOC DESCRIPTION QPS TV SET 1 TIGHTENING TORQUE OF SCREW DRIVER 10 TO 15 kg cm and TV SET IS FACING TOWARDS EAST FOCUS ADJUSTMENT 1 SELECT LION HEAD PATTERN EU 5CH CHOOSE SELECTABLE PICTURE MODE STANDARD 2 ADJUST THE FOCUS KNOB ON FBT USING INSULATED SCREW DRIVER SO THAT 30 AT THE DIAGONAL CENTRE ON LION HEA WILL GET AS SHARP AS POSSIBLE
32. THE TE 2 PAGE HAS SUPERIMPOSED ON THE COLOUR BAR PATTERN SELECT PAGE P102 BY USING PROGRAM UP KEY AND OBSER 3 THAT LARGE CHARACTERS PAGE HAS APPEARED PRESS TV AV KEY TO QUIT FROM TELETEXT MODE SELECT SETTINGS MENU AND CHECK THAT TXT EAST WEST FUNCTION PRESS SUB CODE d ON REMOTE amp CHECK DK I BG OPTIONS RAW MATERIAL CONSUMASLES SR 5 NO LOC DESCRIPTION TV SET NTSC CHECK 1 SELECT COLOUR BAR CIRCLE PATTERN 2 SELECT COLOUR SYSTEMENTSC IN SETTINGS MENU 3 SELECT TINT OPTION IN PICTURE MENU AND VARY ITS VALUE 4 WHILE TINT VARIATION CHECK THAT RED COLOUR IS CHANGING 5 IF FOUND ANY ABNORMALITY IN CHECKING PLEASE REJECT THE SET H V TEST 1 REMOVE THE MAINS CORD FROM PALLET AND INSERT IT IN HV SOCKET SPECIALLY PROVIDED SNAP SPECIAL BALUN INTO TUNER POINT TOUCH THE HV TERMINAL TO BALUN POINT PRESS THE TEST ENABLE BUTTON ON HV TESTER IF BUZZER OPERATES FOR UNSPECIFIED TIME THEN REJECT THE SET REMOVE MAINS CORD FROM SOCKET AND INSERT IN PALLET SOCKET RELEASE THE SET FOR NEXT STAGE AFTER CHECKING MAKE M MODE ON BY PRESSING SERVICE KEY DEMO KEY SETTING PARAMETER 1 1KV 3mA FOR 3 SEC RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION QPS NTSC PATTERN 1 TV SET 1 GENERATOR 3 SERVICE REMOTE 4 FOR NTSC ALIGNMENTS 1 SELECT NTSC PATTERN COLOR BAR CIRCLE PATTERN 2 PRESS MENU 6483
33. ULT LANG 0 17 0 LANG OPT FRENCH RUSSIAN RU FRENCH LANG SW ON OFF ON 30 DESIGN PRAMETERS MENU 9 Parameter Variation Default 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 2 OFF ON ON NOT 3 OFF ON ON NOT 4 OFF ON ON ZOOM V63 V56 WIDE VO V2 3l BLOCK DIAGRAM Audio Processor TDA 9859 Memory Micro Processor UOC IC TDA 9351 ERONT 110VDC V V SMPS 8 3 45 2 1 aV Vertical output SIV 9302A 5V Speaker Audio Output AN17821 a SWITCH IC HEF4052BP LSCART Video Amplifier sb Horizontal O P TB FBT VE01 CHASSIS ALLIGNMENT PROCEDURE ON MANUFACTURING LINE PRODUCT CTV ISTAGE HARNESING AT F A LINE PCB ASSY F A SHEET 1OF1 RAW MATERIAL CONSUMABLES JIGS FIXTURE INSTRUMENTS PREPARED BY SR 5 NO LOC DESCRIPTION 1 110006308 TIE CABLE PLASTIC 2 5X100mm WRAP THE SPEAKER CONNECTOR TO TIE CABLE METAL SLEEVE AT SPEAKER FITTING SCREW TIE THE SPEAKER CONNECTOR TO RIGHT SIDE PORTION OF DEGAUSSING COIL SUCH THAT IT WOULD NOT HANG OVER THE CHASSIS TIE THE DEGUASSING COIL CONNECTOR TO DEGAUSSING COIL CUT THE EXCESS LENGTH OF ALL THE TIES DO NOT LEAVE ANY CUT PORTION OF TIE ON THE CHASSIS RAW MATERIAL CONSU
34. ecoder PAL NTSC or multi standard colour decoder with automatic search system Internal base band delay line RGB control circuit with Continuous Cathode Calibration white point and black level offset adjustment so that the colour temperature of the dark and the light parts of the screen can be chosen independently Linear RGB or YUV input with fast blanking for external RGB YUV sources The Text OSD signals are internally supplied from the microcontroller Teletext decoder Contrast reduction possibility during 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 vertical output stages Horizontal and vertical geometry processing Horizontal and vertical zoom function for 16 9 applications Horizontal parallelogram and bow correction for large screen picture tubes Special Features of micro Controller 80C51 microcontroller core standard instruction set and timing 1 microsecond machine cycle 32 128Kx8 bit late programmed ROM 3 12Kx8 bit Auxiliary RAM shared with Display and Acquisition Auxiliary RAM page pointer 16 bit Data pointer IDLE and Power Down PD mode 14 bits PWM for Voltage Synthesis Tuning 8 bit A D converter 4 pins which be programmed as general I O pin ADC input or PWM 6 bit output Text memory for 1 or 10 pages 13 In the 10 page versions inventory
35. fication and to be applied to cathodes of CRT for generation of R G and B colors If IC 10 is used then internal amplifiers are used to amplify the video signal The transistorized amplifier can be designed by using transistor circuit in which 9 transistors are used Chassis VE01 consist of transistorized video amplifier circuit 9 POWER SUPPLY The DC Voltages required at various part of the chassis are applied 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 33 Volts for tuner and 5 and 8 Volts regulated voltages through IC TA7805 and TA7808 10 MEMORY IC The 24C16 is a 16 Kilo Bit electrically erasable programmable memory EEPROM organized as 128 pages X 16 bytes This is compatible with I2C standards two wire serial interface which uses a bi directional data bus and serial clock 11 11 IC DISCRIPTION AND PIN DETAILS TDA 9351 TV Signal processor Teletex decoder with embedded microcontroller HEF 4052BP gt Video Switch STV 9302 2 Vertical Deflection Output e 24C16 Memory IC e TDA 9859 Sound Processor e AN 17821 Sound Output KA5Q0765 gt STR e Video amplifier 11A TDA 9351 This IC is the functions of a TV signal processor together with a microcontroller and US Closed Caption decoder The IC is used in television receivers with 90degree and 110 de
36. gree picture tubes The ICs have supply voltages of 8 V and 3 3 V and they are mounted in S DIP envelope with 64 pins This IC is having higher degree of integration because delay line with adjustable delay time PAL SECAM NTSC decoder has been integrated In addition to this some special features 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 in two sections TV Signal processor Important Features e Internal switchable time constant for the IF AGC circuit e A choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF amplifier e The mono intercarrier sound versions have a selective FM PLL demodulator which can be switched to the different FM sound frequencies 4 5 5 5 6 0 6 5 MHz The quality of this system is such that the external band pass filters can be omitted Source selection between internal CVBS and external CVBS or Y C signals e Integrated chrominance trap circuit e Integrated luminance delay line with adjustable delay time e Asymmetrical delay line type peaking in the luminance channel e Black stretching for non standard luminance signals 12 Integrated chroma band pass filter with switchable centre frequency Only one reference 12 MHz crystal required for the microcontroller Teletext and the colour d
37. ion Default Setting Remarks VSLOPE 0 63 31 for 50Hz 8 36 for 60Hz For adjusting picture vertical center V SHIFT 0 63 41 for 50Hz amp 36 for 60Hz For shifting picture vertical position V SIZE 0 63 31 for 50Hz amp 36 for 60Hz For adjusting Vertical amplitude V SC 0 63 10 for 50Hz amp 10 for 60Hz For adjusting Vertical S Correction H SHIFT 0 63 38 for 50Hz amp 37 for 60Hz For adjusting picture H position PROG NO 1 27 SERVICE PRAMETERS MENU 2 Parameter Variation Default Setting Remarks AGC 0 63 28 For RF AGC adjustment Search Speed 0 3 0 SERVICE PRAMETERS MENU 3 Parameter Variation Default Setting Remarks BT 0 100 75 CT 0 100 50 SC 3 Screen variation RB 0 63 32 R drive GB 0 63 32 G Drive RD 0 63 32 R cut off GD 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 amp 8 for 60Hz To adjust OSD Vertical position OSD H POS 0 63 27 for 50Hz amp 24 for 60Hz adjust OSD horizontal position DESIGN PRAMETERS MENU 0 Parameter Variation Default Setting SUB CONTRAST 0 63 63 SUB COLOR 0 63 63 SUB SHARPNESS _ 0 63 63 SUB TINT 0 63 31 FS VL H 0 255 0 FS VL L 0 255 0 FS VH H 0 255 0 FS VH L 0 255 0 RGB HSH OFFSET 0 15 6
38. iption Voltage in Volts 1 Khz Colour Pattern 1 YOB independent inputs Out 0 50V puts 2 Y2B Y2 out B independent inputs 0 50V out puts 18 3 ZB Common input outputs 0 50V 4 Y3B independent inputs out 0 50V puts 5 Y1B independent inputs out 0 40 V puts 6 INH enable input active LOW 0 7 VEE VEE 0 8 VSS VSS 0 9 A1 address inputs 0 21V 10 A0 address inputs 0 21V 11 Y3A independent inputs out 0 21V puts 12 YOA independent inputs out 0 puts 13 ZA Common input outputs 0 14 Y1A independent inputs out 0 20V puts 15 Y2A independent inputs out 0 07V puts 16 VDD 7 96V VDD 11C STV 9302A VERTICLE IC The STV 9302A is a vertical deflection booster designed for T V applications This device supplied with upto 35 volts and provides upto 2 Vpp current to derive the vertical deflection yoke Features e Power Amplifier e Fly Back generator e Output Current upto 2 amp e Thermal Protection PINNING STV 9302 Pin no Pin Description 1 Khz Colour Pattern 1 INPUT INVERTING 0 59 V 2 SUPPLY VOLTAGE 14 V 3 FLY BACK GENERATOR 11 43 V 4 Gnd or Negative supply 12 82 V 5 OUT PUT 0 33V 6 OUTPUT STAGE SUPPLY 14 29 V 7 INPUT NON INVERTING 0 61 V 11D IC AT24C16 This is a 16 Kilo Bite EEPROM with a wide operati
39. nd CMBO bits The output can be used to switch sound traps etc 2A 3 SOUND CIRCUIT QSS VERSION The sound IF amplifier is similar to the vision IF amplifier and has an external AGC decoupling capacitor The single reference QSS mixer is realised by a multiplier In this multiplier the SIF signal is converted to the intercarrier frequency by mixing it with the regenerated picture carrier from the VCO The mixer output signal is supplied to the output via a high pass filter for attenuation of the residual video signals With this system a high performance hi fi stereo sound processing can be achieved The AM sound demodulator is realised by a multiplier The modulated sound IF signal is multiplied in phase with the limited SIF signal The demodulator output signal is supplied to the output via a low pass filter for attenuation of the carrier harmonics The AM signal is supplied to the output pin 44 via the volume control It is possible to get the AM output signal not controlled on amplitude on the QSS intercarrier output The selection is made by means of the AM bit in subaddress 29H Another possibility is that pin 35 is transferred to external audio input pin and pin 32 to non controlled AM output pin This can be realised by means of the setting the control bits CMBO and CMB1 in subaddress 22H 2A 4 FM DEMODULATOR AND AUDIO AMPLIFIER MONO VERSIONS The FM demodulator is realised as narrow band PLL with external loop filter which p
40. nd blue vertical lines in the center area of picture screen 4 Turn the both tabs at the same time keeping the angle constant to superimpose red and blue horizontal lines at the center of the screen See fig 04 amp 02 5 Adjust two tabs of 6 Pole magnets to superimpose red blue line and green one Adjusting the angle affects the vertical lines and rotating both magnets affects the horizontal lines 6 Repeat adjustments 3 4 5 keeping in mind red green and blue movement because 4 Pole Magnets and 6 Pole Magnets have mutual interaction and make line mavamant 1 Loosen the clamping screw of deflection yoke slightly to allow the yoke to tilt 2 Temporarily put a wedge as shown in fig1 Do not remove cover paper on adhesive part of the wedge 3 Tilt front of the deflection yoke up or down to obtain better convergence in circumference see fig 3 Push the mounted wedge to space between picture tube and the yoke to fix the yoke temporarily 4 Put other wedge in to bottom space and remove the cover paper to stick 5 Tilt front of the yoke right or left to obtain better convergence in circumference see fig 3 6 Keep the yoke position and put another wedge in either upper space Remove cover paper and stick the wedge on picture tube to fixthe yoke 7 Detach the temporarily mounted wedge and put it in another upper space Stick it on picture tube to fix the yoke 8 After fixing three wedges recheck
41. ng range Features e Data EEPROM internally organized as 2048 bytes and 128 pages X 16 bytes e Low power C MOS e Vcc 2 7 5 5 Volt operation Two wire serial interface bus I C Bus Compatible e Filtered Inputs for Noise Suppression with Schmitt Trigger e Clock frequency upto 400 KHz e High Programming flexibility e High reliability Endurance 10 Cycles Data retention 40 Years ESD protection 4000V on all pins 8 Pin DIP DSO packages e Available for extended temperature ranges Industrial 40 C to 85 C Automotive 40 to 125 C 20 PINNING 24C16 Pin Pin Description Stand By ON Condition Voltage No Voltage 1 Khz Colour Pattern 1 GND OV 2 GND OV 3 GND 4 GND OV 5 SDA Serial Data Input 3 12 V 3 23 V 6 SCL Serial clock 2 54 V 2 56 V 7 GND OV OV 8 VCC 5V 5V 11E IC TDA9859 SOUND PROCESSOR TDA 9859 sound processor provides the sound control facilities for the main and 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 12 C bus control for all functions Multi Source Selector Switches Six AF Inputs Three Stereo Sources or Six Mono Sources can be used as a input Each of the input signal can be switched to each of outputs Out put for large speaker channels and
42. of transmitted Teletext pages stored in the Transmitted Page Table TPT and Subtitle Page Table SPT Data Capture for 525 625 line WST VPS PDC system A and Wide Screen Signalling WSS bit decoding Automatic selection between 525 WST 625 WST Automatic selection between 625 WST VPS on line 16 of VBI Real time capture and decoding for WST Teletext in Hardware to enable optimized processor throughput Automatic detection of FASTEXT transmission Real time packet 26 engine in Hardware for processing accented 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 Display Features Teletext and Enhanced OSD modes Single Double Quadruple Width and Height for characters Scrolling of display region Variable flash rate controlled by software Enhanced display features including over lining underlining and italics Soft colours using CLUT with 4096 colour palette Globally selectable scan lines per row 9 10 13 16 and character matrix 12x10 12x13 12x16 VxH Fringing Shadow selectable from N S E W direction Fringe colour selectable Meshing of defined area 32 software redefinable On Screen display characters 14 PINNING TDA 9351 Pin No Description Value 1 Stand By Stand by Low Level 0 High Level 3 31V 2 SCL Clock Signal Output Low level OV High Level 3
43. orizontal and vertical 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 25 MHz This oscillator is stabilised to this frequency by using a 12 MHz signal coming from the reference oscillator of the micro controller Teletext decoder The horizontal drive is switched on and off via the soft start stop procedure This function is realised by means of variation of the T ON of the horizontal drive pulses In addition the horizontal drive circuit has a low power start up function The vertical synchronisation is realised by means of a divider circuit The vertical ramp generator needs an external resistor and capacitor For the vertical drive a differential output current is available The outputs must be DC coupled to the vertical output stage In the types which are intended for 90 degree picture tubes the following geometry parameters can be adjusted e Horizontal shift e Vertical amplitude e Vertical slope e S correction e Vertical shift The types which are intended to be used in combination with 110 degree picture tubes have an East West control circuit in stead of the AVL function The additional controls for these types are e EW width e EW parabola width e _EW upper and lower corner parabola correction e EW trapezium correction e Vertical zoom 2A 6 CHROMA AND LUMINANCE PROCESSING
44. output 2Vpp 54 VddA Analog supply of Teletext 3 3V decoder and digital supply of TV processor 55 VpE OTP Programming OV Voltage 56 VddC Digital supply to core 3 3V 57 OSCGND Oscillator ground supply OV 17 58 XTAL IN Crystal oscillator input 1 57V 59 XTAL OUT Crystal oscillator output 1 76V 60 RESET Reset OV 61 VddP Digital supply to periphrery 3 3V 62 AV1 AV input from video 0 06V switching IC 3 3 V 63 AV2 AV input from video 0 6V switching IC 3 3 V input 64 IRIN IR Input 4 8V 11B IC BU4052 16 Pin IC This IC is used for video switching The HEF 4052B is a dual four channel analog Multiplexer De Multiplexer with common channel select Logic Each Multiplexer De Multiplexer has four independents inputs out puts Yo 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 analog switches each with one side connected to an independent input out put Yo to Y3 and the other side connected to common input out put 2 For operation as a digital multiplexer demultiplexer VEE is connected to VSS typically ground Application Information e Analog Multiplexing and De Multiplexing e Digital Multiplexing and demultiplexing e Signal Gating PINNING HEF 4052BP Pin no Pin Descr
45. put Low Level 3 10V High Level 3 27V 18 MAIN OUT Left Loud Speaker Out Put Low Level 0V Left Channel High Level 3 8V 19 CTL Treble Capacitor Low Level 0 10V Connection Left High Level 3 8V Channel 20 Woff Out Left N C Woofer Output Left 0 21 CBL 2 Bass Capacitor Low Level 0 32V Connection 1 Left CH High Level 3 8V 22 CBL 1 Bass Capacitor Low Level 0 29V Connection 2 Left CH High Level 3 8V 23 VI 7 Input to Loud Low Level 0 27V Speaker Left Channel High Level 3 8V 24 VO 1 Main Output Left CH Low Level 0 25V High Level 3 8V 25 GND 0 26 AUDIO OUT Left Scart Output Left Low Level 0 05V Channel High Level 3 8V 27 CPS2 Pseudo Stereo Low Level 0 23V Capacitor 2 High Level 3 8V 28 AV 2 Left AV2 Left Low Level 0 22V High Level 3 8V 29 CPS 1 Pseudo Stereo Low Level 0 20V Capacitor 1 High Level 3 8V 30 AV 2 Right AV2 Right Low Level 0 19V High Level 3 8V 31 P 2 NC Port 2 Output 0 32 AM Right Scart Input Right Low Level 0 18V 23 High Level 3 8V 11F SOUND OUTPUT IC the IC AN178421 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 delivered into an 8 Ohm Load PINNING AN17821 Pin No Description Voltage in Volts 1 VCC 13V 2 Channel 1 out put Low Level OV High Level 6 0
46. rovides the necessary selectivity without using an external band pass filter To obtain a good selectivity a linear phase detector and constant input signal amplitude are required For this reason the intercarrier signal is internally supplied to the demodulator via a gain controlled amplifier and AGC circuit The nominal frequency of the demodulator is tuned to the required 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 means of the control bits FMA and FMB in control byte 29H When required an external sound band pass filter can be inserted in front of the narrow band PLL In that case pin 32 has to be switched to sound IF input by means of the bits SIF subaddress 21H and 1 subaddress 22H When the sound IF input is selected the subcarrier output or AVL function are not available From the output status bytes it can be read whether the PLL frequency is inside or outside the window and whether the PLL is in lock or not With this information it is possible to make an automatic search system for the incoming sound frequency This can be realised by means of a software loop which switches the demodulator to the various frequencies and then select the frequency on which a lock condition has been found The deemphasis output signal amplitude is independent of the TV standard and has the same val
47. ue for a frequency deviation of 25 kHz at the 4 5 MHz standard and for a deviation of 50 Khz for the other standards The audio control circuit contains an audio switch and volume control In the mono intercarrier sound versions the Automatic Volume Levelling AVL function can be activated The pin to which the external capacitor has to be connected depends on the IC version For the 90 degree types the capacitor is connected to the EW output pin pin 20 For 6 the 110 degree types a choice must be made between the AVL function and a sub carrier output for comb filter applications This choice is made via the CBM0 and CMB1bits in subaddress 22H When the AVL is active it automatically stabilises the audio output signal to a certain level The signal on the deemphasis pin 28 can be supplied to the SCART connector via a buffer stage It is also possible to use this pin as additional audio input In that case the internal signal must of course be switched off This can be realised by means of the sound mute bit SM in subaddress 29H When the IF circuit is switched to positive modulation the internal signal on the deemphasis pin is automatically muted The audio switch is controlled by means of the INA INB bits in subaddress 22H It is however also possible to overrule the audio switch position by means of the ADS and ADX bits subaddresses 28H and 21H respectively 2A 5 SYNCHRONISATION CIRCUIT The IC contains separator circuits for the h
48. uit diagram and track side layout of VEO1 chassis is also attached in this manual for easy reference 1 PERI TV SOCKET SCART r 13579 11 13 15 17 19 21 Shell 2468 10 12 14 16 18 20 Viewed From Solder Side PIN DETAILS OF SCART Pin Name Description Signal Level Impedance 1 Audio Out Right 0 5 V rms lt 1k ohm 2 AIR Audio In Right 0 5 V rms gt 10k ohm 3 AOL Audio Out Left Mono 0 5 V rms lt 1k ohm 4 AGND Audio Ground 5 BGND RGB Blue Ground 6 AIL Audio In Left Mono 0 5 V rms gt 10k ohm 7 B RGB Blue In 0 7 V 75 ohm 8 SWTCH Audio RGB switch 16 9 72 V IV 5 8 V WideScreen 9 5 12 549 kohm 9 GGND 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 R GND RGB Red Ground 14 DATAGND Data Ground 15 R 0 7 V Chroma 0 3 V burst 75 ohm Chrominance 16 BLNK Blanking Signal 1 3 V RGB 0 0 4 V Composite 75 ohm 17 VGND Composite Video Ground 18 BLNKGND Blanking Signal Ground 19 VOUT Composite Video Out 1V 75 ohm 20 VIN Composite Video In 1 V 75 ohm Luminance 21 SHIELD Ground Shield Chassis 2 MICRO CONTROLLER AND SMALL SIGNAL FUNCTION WITH TDA 9351 This IC is a combination of microcontroller and chroma Small Signal function This IC performs all important functions in TV receiver The details of IC are bifurcated in two parts Small Signal function and microcontroller 2A SMALL SIGNAL FUNCTIO
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