SERVICE MANUAL
Contents
1. SERVICE Adjust Description id mode STSO 1 2 3 4 UOC system surveillance display IFP1 00 IF PRESET VALUE 1 H IFP2 00 IF PRESET VALUE2 TINT 20 BASE BAND TINT CONTROL H 5WBF adjustable 5WBR adjustable TWBK 88 TIME OF WIDE BLANKING PWL 15 Peak white limted H OIF 20 Off set if demodulatour H 6WBF adjustable 6WBR adjustable SHP 6HP adjustable PARALLELOGRAM CORRECTION i SHB 6HB adjustable BOW CORRECTION SHSH 6HSH adjustable HORIZONTAL SHIFT SHZD 6HZD 0A DVD HORIZONTAL SHIFT PT SEWW 6EWW adjustable E W WIDTH l SEWP 6EWP adjustable PARABOLA WIDTH SUCR 6UCR adjustablee E W UPPER CORNER PARABOLA li SLCR 6LCR adjustable E W BOTTOM CORNER PARABOLA STC OTC adjustable E W TRAPEZIUM 5VSL 6VSL adjustable VERTICAL SLOPE li SVAM 6VAM adjustable VERTICAL AMPLITUDE id 5SCL 6SCL adjustable VERTICAL S CORRECTION li 5VSH 6VSH adjustable VERTICAL SHIFT SVZD 6VZD 00 DVD VERTICAL SHIFT 5 6 26 OSDVERTICAL SHIFT RED 20 BLACK LEVEL OFFSET R ld GRN 20 BLACK LEVEL OFFSET G m WPR IF WHITE POINT R WPG IF WHITE POINT G WPB IF WHITE POINT B DRED 00 DVD BLACK LEVEL OFFSET R DGRN 50 DVD BLACK LEVEL OFFSET R nt DWPR 00 DVD WHITE POINT R DWPG 00 DVD WHITE POINT G js DWPB 00 DVD WHITE POINT B lisi YDFP YDEN 100 LUM2. QSSO AMOUT 35 QSS intercarrier output AM output external audio input A UDEXT 2 EHTO 36 EHT overvoltage protection input PLLIF 37 IF PLL loop filter IFVO SVO DVBO 38 IF video output selected CVBS output DVB output 39 main supply voltage TV processor CVBSI 40 internal CVBS input GND 41 ground for TV processor CVBS3 Y 42 CVBS3 Y input C 43 chroma input AUDOUT 44 audio output AM audio output volume controlled INSSW2 45 2nd RGB YUV insertion input R2 V PR IN 46 2nd R input V R Y input PR input G2 Y IN 47 2nd G input Y input B2 U PB IN 48 2nd B input U B Y input PB input BCLIN 49 beam current limiter input BLKIN 50 black current input V guard input RO 51 Red output GO 52 Green output BO 53 Blue output VDDA 54 analog supply of Teletext decoderand digital supply VPE 55 OTP Programming Voltage VDDC 56 digital supply to core 3 3 V OSCGND 57 oscillator ground supply XTALIN 58 crystal oscillator input XTALOUT 59 crystal oscillator output RESET 60 reset VDDP 61 digital supply to periphery 3 3 V 62 port 1 0 or external interrupt 1 input 1 0 63 port 1 1 or Counter Timer 0 input 2 INTO 64 port 1 2 or external interrupt 0 input PI 5 TI 1 port 1 3 or Counter Timer input PI 6 SCL 2 port 1 6 or I2C bus clock line P1 7 SDA 3 port 1 7 or I2C bu
3. SYMBOL PIN DESCRIPTION P3 1 ADCI PWMI 6 port 3 1 or ADCI input or output P3 2 ADC2 PWM2 7 port 3 2 or ADC2 input or PWM2 output P3 3 ADC3 PWM3 8 port 3 3 or ADC3 input PWMS output VSSC P 9 digital ground for Controller core and periphery P0 5 10 port 0 5 8 mA current sinking capability for direct drive of LEDs H port 0 6 8 mA current sinking capability for direct drive of LEDs Composite video input positive going 1 V peak to peak input is required VSSA 12 digital ground of TV processor SECPLL 13 SE CAM PLL decoupling VP2 14 2nd supply voltage TV processor 8 DECDIG 15 supply voltage decoupling of digital circuit of TV processor PH2LF 16 phase 2 filter PHILF 17 phase 1 filter GND3 18 ground 3 for TV processor DECBG 19 bandgap decoupling AVL EWD 1 Automatic Volume Levelling 90versions E W drive output ap 1 10versions VDRB 21 vertical drive B output VDRA 22 vertical drive A output IFINI 23 IF input 1 IFIN2 24 IF input 2 IREF 25 reference current input VSC 26 vertical sawtooth capacitor AGCOUT 27 tuner AGC output Se ELEME 28 SIF input 1 audio deemphasis 29 SIF input 2 decoupling sound demodulator GND2 30 ground 2 for TV processor E Co 3l narrow band PLL AGC sound IF AVL REFO SNDIF 32 Automatic Volume Levelling subcarrier reference output AMOUT 2 sound IF input AM output HOUT 33 horizontal output FBISO 34 flyback input sandcastle output 20
4. SOUND 2 OP NOT 011 English Farsi 010 English Russian 4 NOT 3 001 English Ukrainian 0 000 English Paneuro 5 USER LOGO USER S LOGO SETUP 0 6 ON BLACK 1 blue back 0 black back 0 7 FSL 0 0 ENGLISH OSD language 1 ENGLISH 1 1 OSD language 1 CZECH 1 2 SLOVAK OSD language 1 SLOVAK 1 OP3 3 OP RUSSIAN OSD language 1 RUSSIAN 1 4 OP FRENCH OSD language 1 FRENCH 1 5 OP GERMAN OSD language 1 GERMAN 1 6 OP ITALY OSD language 1 ITALY 1 7 SPANISH OSD language 1 SPANISH 1 0 PORTUGUESE OSD language 1 PORTUGUESE 1 1 SERBIAN OSD language 1 SERBIAN 1 2 TURKISH OSD language 1 TURKISH 1 OP POLISH OSD language 1 POLISH 1 4 BULGARIAN OSD language 1 BULGARIAN 1 5 OP ROMANIAN OSD language 1 ROMANIAN 1 6 CROATIAN OSD language 1 CROATIAN 1 7 HUNGARIAN OSD language 1 HUNGARIAN 1 0 OP_UKRAIN OSD language 1 Ukrainian 1 1 OSD language 1 ARABIC 1 2 FARSI OSD language 1 FARSI 1 5 3 OP BLANK BLANK 0 4 OP BLANK BLANK 0 5 OP RFTOAV 1 5 RCA 1 1517 1 1517 0 TFA9842AJ 0 7 FAKE AVL 1 FAKE AVL 0 AVL 0 0 OP AV ON 1 AV shutdown AV restart 0 TV restart 1 1 DIRECT SWITCH 1 memory restart 0 power on and standby 1 2 HCO EHT tracking mode
5. 0 3 OP CHH LOGO 1 CHANGHONG logo 0 4 800 1 D K 1 5 OP SOUND BG 1 B G 1 6 SOUNDI 1 1 1 7 SOUND M 1 M 1 11 0 AUTO LANGO 0 AUTO Language 4 3 2 1 0 1 PAUIO LANG ENGLISH 00000 2 OP AUTO LANG2 CZECH 00001 0 3 AUTO LANG3 P TRUE 0 OP7 4 AUTO LANG4 0 QARSECRE OP FORS FORF 00 AUTO 60HZ 01 KEEP LAST 6 10 FORCE 60HZ 11 AUTO 50HZ l 7 HOTEL ON PROG 1 Startup on channel 1 hotel model availableO 0 AUTO TEST Power on self test 1 yes 0 no 0 1 OP_PSNS sensibility 0 2 B SCREEN Black screenl Yes 0 No 0 8 3 OP SECAM 1 5 1 4 DFL Disable flash protection 1 5 OP SIF 0 6 EXT SIFO 1 7 EXT SIFI D K 00 B G 01 I 10 M 11 5 pP TUNER VTAS CADI TAPS C4123 0 1 TINT 1 PAL TINT Adjust 1 2 FMWS WINDOW OF SOUND PLL 200KHZ 1 9 3 OP FMWSI WINDOW OF SOUND PLL 600KHZ 0 4 OP OSVE 0 5 OP FFI 0 6 OP SPEED 1 Program quickly l yes Ono 0 7 OP SPEEDO Program slowly l yes Ono 0 0 OP_AKIRA_LOGO LOGO AKIRA 0 1 for slim crt If HBL 1 5 6WBF and 5 6WBR are available 0 2 OP NTSC TUNER 1 TAF5 U2F22 0 OP_CHILD_LOCK 1 CHILD LOCK 0 oe 4 BLANK 0 5 OP BLANK BLANK 0 6 BLANK BLANK 0 7 TEXT KEY 1 remote control unit TEXT key available 1 Notes The dat
6. 0 TDA9384PS N3 3 Forsim CR T Small signal processor and micro control no teletext TDA9353PS N3 3 Forslim CRT Small signal processor and micro control 1 page teletext 4938 1PS N3 3 Small signal processor and micro control no teletext TDA9345PS N3 3 Small signal processor and micro control 1 page teletext N601 TFA9842AJ Audio power amplifier N300 TDA4863AJ slim CRT TDA4864AJ Vertical scan output stage circuit N801 STR G5653 Switch mode power supply control A001 TAF5 C4121 TAF5 C4123 IF 38MHz tuner 5 4122 IF 38 9MHz tuner TAF5 U2F22 IF 45 75MHz tuner 14 4 SERVICE DATA 4 1 TV signal processor TDA935X 8X PS N3 series 4 1 1 GENERAL DESCRIPTION The various versions of the TDA935X 8X PS N3 series combine the functions of a video processor together with a Controller and US Closed Caption decoder Most versions have a Teletext decoder on board The Teletext decoder has an internal RAM memory for 1 or 10 page text The ICs are intended to be used in economy television receivers with 90and 110 tubes The ICs have supply voltages of 8 V and 3 3 V and they are mounted in an SDIP 64 envelope The features are given in the following feature list 4 1 2 FEATURES TV processor Available in TDA935X 8X PS versions Multi standard vision IF circuit with alignment free PLL demodulator nternal switchable time constant for the IF AGC circuit The mono intercarrier sound circuit has a sele
7. COLOR TELEVISION SERVICE MANUAL MODEL NO PF21GB300 CHASSIS NO ETE 2 Please read this manual carefully before service Catalog Safety Instructions and M ATtenanee ios p ERE ers 2 Adjustments de ae ua UE A Structure and Chassis Function Description 22 13 Service Data 1 SAFETY INSTRUCTIONS AND MAINTENANCE WARNING BEFORE SERVICING THIS CHASSIS READ THE X RAY RADIATION PRECAUTION SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE INSTRUCTION BELOW 1 1 X RAY RADIATION PRECAUTION 1 1 1 The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit X ray radiation as result of excessive EHT voltage The maximum EHT voltage permissible in any operating circumstances must not exceed the rated value When checking the EHT use the High Voltage Check procedure in this manual using an accurate EHT voltmeter 1 1 2 The only source of X RAY radiation in this TV is the CRT The TV minimizes X RAY radiation which ensures safety during normal operation To prevent X ray radiation the replacement CRT must be identical to the original fitted as specified in the parts list 1 1 3 Some components used in this TV have safety related characteristics preventing the CRT from emitting X ray radiation For continued safety replacement component should be made after referring the PRODUCT SAFETY NOTICE below 1 1 4 Serv
8. INANCE DELAY TIME adjustable AGC TAKE OVER VOL 2A Volume control PT VOLA 20 Dummy AVL level H CORE 03 Core noise reduction H VLG 1 0A The first line vertical position of LOGO VLG2 OE The second line vertical position of LOGO mM COLI 04 The color of first line LOGO COL2 04 The color of second line LOGO m TIME OF The time of No signal auto off H IFFS 02 IF 38MHZ 03 38 9MHZ 02 45 75MHZ 01 HDOL 0A Cathode drive level AGC 03 AGC time H VG2B 1A VG2 bright set Pot SBRI 24 Sub bright MBRI 30 Max bright Me SCON 20 Sub contrast MCON 39 Max contrast 77 SCOL 32 Sub color OPI Optional 1 TS OP2 Optional 2 OP3 Optional 3 om OP4 Optional 4 Tn 5 Optional 5 6 Optional 6 PET OP7 Optional 7 uere OP8 Optional 8 OP9 Optional 9 NE OP10 Optional 10 INIT EEPROM init VG2 Screen Voltage Rotate knob of the SCREEN on the FBT VSD BIT Name Deccription Data 0 OP_HOTEL HOTEL model 1 yes 0 no 1 1 OP_236 CHANNEL number setup 1 236 0 100 1 2 OP_NTSC NTSC 1 yes 0 no 1 3 OP AV2 2 AV input 1 AV2 0 no AV2 1 4 5 VSH S VIDEO input 1 yes 0 no 0 5 OP DVD DVD input 1 yes 0 no 0 6 OP SCART SCART 1 yes 0 no 1 7 5 Switch off in vertical overscan l ings 0 OP AVL AVL lyes 0 no AVL SLIM CRT 1 10 OP AUTO SOUND AUTO
9. a sheet may differ dependent on different models The data sheet may differ dependent on different CRTs for the same model 19 3 STRUCTURE AND CHASSIS FUNCTION DESCRIPION 3 1 STRUCTUE BLOCK DIAGRAM Video Amplifier TUNER Power Supply Audio Circuit Amplifier 3 2 CHASSIS DESCRIPTION 3 2 1 General Description ETE 2 chassis is applied in PF21GB300 seriers By use of philips UOC for TV small signal processing and bus control the chassis enables TV tuning adjustment control and picture correction featuring high integration high performance to price ratio and high reliability and compact circuit with fewer external components The chassis widely used in small and medium TVs provides much more convenience for manufacturing and technical service It includes UOC TDA9384PS N3 3 for PAL NTSC SECAM small signal processing and bus control EEPROM AT24C08 for data memory TDA4863AJ for vertical output power amplifying TFA9842AJ for audio power amplifying Thick film IC STR G5653 for power circuit adjustment and control 3 2 2 The following features are available in the chassis Color systems PAL SECAM NTSC selectable Sound systems D K B G I M 236 programs preset AV stereo Hotel Biorhythm child lock teletext selectable 3 2 3 The chassis mainly uses the following ICs and assemblies Position Type Description 1 N200 AT24C08 EERPOM 13 N10
10. and decrement in convergence of the CRT 1 2 6 When remounting the TV chassis ensure that all guard devices such as nonmetal control buttons switch insulating sleeve shielding cover isolating resistors and capacitors are installed on the original place 1 2 7 Replace blown fuses within the TV with the fuse specified in the parts list 1 2 8 When replacing wires or components to terminals or tags wind the leads around the terminal before soldering When replacing safety components identified by the international hazard symbols on the circuit diagram and parts list it must be the company approved type and must be mounted as the original 1 2 9 Keep wires away from high temperature components 1 3 PRODUCT SAFETY NOTICE CAUTION FOR YOUR PROTECTION THE FOLLOWING PRODUCT SAFETY NOTICE SHOULD BE READ CAREFULLY BEFORE OPERATING AND SERVICING THIS TV SET 1 3 1 Many electrical and mechanical components in this chassis have special safety related characteristics These characteristics are often passed unnoticed by a visual inspection and the X ray radiation protection afforded by them cannot necessarily be obtained by using replacements rated at higher voltages or wattage etc Components which have these special safety characteristics in this manual and its supplements are identified by the international hazard symbols on the circuit diagram and parts list Before replacing any of these components read the parts list in this manual carefully Substitu
11. ctive 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 The FM PLL demodulator can be set to centre frequencies of 4 74 5 74 MHz so that a second sound channel can be demodulated In such an application it is necessary that an external band pass filter is inserted Integrated chrominance trap circuit Integrated luminance delay line with adjustable delay time Picture improvement features with peaking with switchable centre frequency depeaking variable positive negative overshoot ratio and video dependent coring and blue and black stretching All features are available for CVBS Y C and YPBPR signals Tint control for external RGB YPBPR signals Integrated chroma band pass filter with switchable centre frequency Only one reference 12 MHz crystal required for the Controller Teletext the colour decoder Multi standard colour decoder with automatic search system nternal base band delay line Indication of the Signal to Noise ratio of the incoming CVBS signal linear RGB YUV YPBPR input with fast blanking for external RGB YUV sources The synchronisation circuit can be connected to the incoming Y signal The Text OSD signals are internally supplied from the Controller Teletext decoder RGB control circuit with Continuous Cathode Calibration white point and black
12. e flash rate controlled by software Enhanced display features including overlining 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 Contrast reduction of defined area Cursor Special Graphics Characters with two planes allowing four colours per character 32 software redefinable On Screen display characters 4 WST Character sets G0 G2 in single device e g Latin Cyrillic Greek Arabic Mosaic graphics Limited G3 Line drawing characters WST Character sets and Closed Caption Character set in single QUICK REFERENCE DATA SYMBOL PARAMETER MIN MAX UNIT Supply Vp supply voltages 8 0 3 3 V Ip supply current VP 8 V 135 mA Ip supply current VP 3 3 V 60 mA Input voltages video IF amplifier sensitivity RMS 75 V ViVIF rms value en ais one IF amplifier sensitivity 45 ViAUDIO rms external audio input RMS value 500 mV external CVBS Y input peak to peak 10 V ViCVBS p p value ViCHROMA p p 0 3 V external chroma input voltage burst amplitude 17 peak to peak value ViRGB p p 0 7 V RGB inputs peak to peak value V
13. es recheck overall convergence and ensure to get optimal convergence Tighten the lamp screw holding the deflection yoke assembly 4 POLE MAGNETS THE ANGLE FIXED Wc B N ROTATE TWO TABS AT THE SAME TIME HORIZONTAL LINES PURITY MAGNET CONVERGENCE MAGNET ASSEMBLY ADJUSTMENT OF MAGNETS Fig 2 4 pole Magnet Movement 6 pole Magnet Movement RED BLU GRN RED BLU d rt Incline the Yoke Up or Down Incline the Yoke Right or Left Circumference Convergence by DEF Yoke Fig 3 2 1 3 White Balance Adjustment Generally white balance adjustment is made with professional equipment It s not practical to get good white balance only through manual adjustment For TVs with I2C bus control change the bus data to adjust white balance 2 2 CIRCUIT ADJUSTMENTS Preparation Circuit adjustments should be made only after completion of set up adjustments Circuit adjustments can be performed using the adjustable components inside the TV set For TVs with 2 I C bus control first change the bus data 2 2 1 Degaussing A degaussing coil is built inside the TV set Each time the TV is powered on the degaussing coil will automatically degauss the TV If the TV is magnetized by external strong magnetic field causing color spot on the screen use a specific degausser to demagnetize the TV in the following ways Otherwise color distortion will be shown on the screen Power on the TV set and operate i
14. iY p p 1 4 V luminance input signal peak to peak value ViU p p U PB input signal peak to peak 1 33 Y value WDD Aa X ViV p p PR input signal peak to peak 1 05 Y value VE DD Ga n Am Output signals demodulated CVBS output 2 0 V Vo IFVO p p peak to peak value sound IF intercarrier output in QSS 100 mV Vo QSSO rms versions RMS value o AMOUT rms demodulated AM sound output in 500 mV QSS versions RMS value selected CVBS output peak to peak 2 0 V Yo CVBSO p p _ Value I o AGCOUT tuner AGC output current range 0 mA RGB output signal amplitudes 2 0 V V oRGB p p peak to peak value I oHOUT horizontal output current 10 mA vertical output current peak to peak 1 mA I oVERT value BLOCK DIAGRAM 18 HOLSYLS 318 IW3SNI LXSL 0so NL HSlMHS HINOO MTE Avidsid 050 1 313781 01 AHI3NO39 1n04 Y V 2 INOWA I AdIHS H ME 8007 wZ SAIHQ A I Li wwe SEN anveasve L oS1N Wvo3sr va UE UNE NOILISINS OV S1MO0d OVQ WAd LSA H3AISOSNY HL e SLYOd O I xp 20 HOLIMS Olaniv SISvHdi aad Tid ONNOS TELE Peso 5591715 O3dlA LNAI O3GIA h MO1vinaowaa WY 550 dl ANNOS sso 0550 19 PINNING
15. ice and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT anode So ensure that the maximum EHT voltage does not exceed the rated value after service and adjustment 1 2 SAFETY PRECAUTION WARNING REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY 1 2 1 The TV has a nominal working EHT voltage Extreme caution should be exercised when working on the TV with the back removed Do not attempt to service this TV if you are not conversant with the precautions and procedures for working on high voltage equipment When handling or working on the CRT always discharge the anode to the TV chassis before removing the anode cap in case of electric shock The CRT if broken will violently expel glass fragments Use shatterproof goggles and take extreme care while handling Do not hold the CRT by the neck as this is a very dangerous practice 1 2 2 It is essential that to maintain the safety of the customer all power cord forms be replaced exactly as supplied from factory 1 2 3 Voltage exists between the hot and cold ground when the TV is in operation Install a suitable isolating transformer of beyond rated overall power when servicing or connecting any test equipment for the sake of safety 1 2 4 When replacing ICs use specific tools or a static proof electric iron with small power below 3 5W 1 2 5 Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to avoid electronic gun magnetized
16. is symbol tells you that the critical components identified by the VDE TUV marking have special safety related characteristics 1 5 MAINTENANCE 1 5 1 Place the TV set on a stable stand or base that is of adequate size and strength to prevent it from being accidentally tipped over pushed off or pulled off Do not place the set near or over a radiator or heat register or where it is exposed to direct sunlight 1 5 2 Do not install the TV set in a place exposed to rain water excessive dust mechanical vibrations or impacts 1 5 3 Allow enough space at least 10 between the TV and wall or enclosures for proper ventilation 1 5 4 Slots and openings in the cabinet should never be blocked by clothes or other objects 1 5 5 Please power off the TV set and disconnect it from the wall immediately if any abnormal condition are met such as bad smell belching smoke sparkling abnormal sound no picture sound raster Hold the plug firmly when disconnecting the power cord 1 5 6 Unplug the TV set from the wall outlet before cleaning or polishing it Use a dry soft cloth for cleaning the exterior of the TV set or CRT screen Do not use liquid cleaners or aerosol cleaners 2 ADJUSTMENTS 2 1 SET UP ADJUSTMENTS The following adjustments should be made when a complete realignment is required or a new picture tube is installed Perform the adjustments in the following order Color purity Convergence White balance Notes The purity c
17. level off set adjustment so that the colour temperature of the dark and the light parts of the screen can be chosen independently 2 levels of contrast reduction of main picture possible during OSD Text insertion halftone OSD Text gain reduction control Adjustable wide blanking of the RGB outputs 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 15 Horizontal and vertical zoom function for 16 9 applications Horizontal parallelogram and bow correction for large screen picture tubes Low power start up of the horizontal drive circuit Macrovision keying possibility for horizontal synchronisation Available in TDA935X 6X 8X PS versions choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF amplifier Source selection between the internal CVBS and an external CVBS or Y C signal Controller 80C5 1 controller core standard instruction set and timing 1 s machine cycle 32 128Kx8 bit late programmed ROM e 3 12Kx8 bit Auxiliary RAM shared with Display Interrupt controller for individual enable disable with two level priority Two 16 bit Timer Counter registers One 16 bit Timer with 8 bit Pre scaler WatchDog timer Auxiliary RAM page poin
18. loudspeaker terminal 2 CIV 3 common input voltage decoupling IN1 4 input 1 GND 5 ground SVR 6 half supply voltage decoupling ripple rejection 7 volume control input standby mute and volume control OUT1 8 loudspeaker terminal 1 Voc 9 supply voltage 4 3 VERTICAL SCAN OUTPUT STAGE CIRCUIT TDA4863AJ TDA4864AJ 4 3 1 FEATURES TDA4863AJ Output current up to 3 A p p TDA4864AJ Output current up to 2 5A p p 4 3 2 GENERAL DESCRIPTION The TDA4863AJ and TDA4864AJ are deflection boosters for use in vertical deflection systems for frame frequencies up to 200 Hz 23 The TDA4863AJ TDA4864AJ needs a separate flyback supply voltage so the supply voltages are independently adjustable to optimize power consumption and flyback time For TDA4863AJ or 4864 the flyback supply voltage will be generated internally by doubling the supply voltage and therefore a separate flyback supply voltage is not needed 4 3 3 Block diagram of TDA4863AJ and TDA4864AJ EJA EJA DIFFERENTIAL FLYRACK REFERENCF INPUI STARE GENERA CIRCUIT from TOASBSX Ri i NN LL 1 du 4 3 4 pinning PIN SYMBOL DESCRIPTION 1 VPI positive supply voltage 1 2 VP3 flyback generator output 3 VP2 supply voltage 2 for vertical output 4 GND ground or negative supply voltage 5 V OUT vertical output 6 INN inverted input of differential input stage 7 INP non inve
19. ny convergence adjustment the TV should be operated for at least 15 minutes Center convergence adjustment Receive dot pattern Adjust the brightness contrast controls to obtain a sharp picture Adjust two tabs of the 4 pole magnet to change the angle between them and red and blue vertical lines are superimposed each other on the center of the screen Turn both tabs at the same time keeping the angle constant to superimpose red and blue horizontal on the center of the screen Adjust two tabs of the 6 pole magnet to superimpose red blue line and green line Remember red and blue movement Repeat steps 2 1 3 2 1 5 until optimal convergence is obtained Circumference convergence adjustment Loosen the clamp screw holding the deflection yoke assembly and allow it tilting Temporarily put the first wedge between the picture tube and deflection yoke assembly Move front of the deflection yoke up or down to obtain better convergence in circumference Push the mounted wedge in to fix the yoke temporarily Put the second wedge into bottom Move front of the deflection yoke to the left or right to obtain better convergence in circumference Fix the deflection yoke position and put the third wedge in either upper space Fasten the deflection yoke assembly on the picture tube Detach the temporarily mounted wedge and put it in either upper space Fasten the deflection yoke assembly on the picture tube After fastening the three wedg
20. onvergence magnet assembly and rubber wedges need mechanical positioning For some picture tubes purity convergence adjustments are not required 2 1 1 Color Purity Adjustment Preparation Before starting this adjustment adjust the vertical sync horizontal sync vertical amplitude and focus Face the TV set north or south Connect the power plug into the wall outlet and turn on the main power switch of the TV set Operate the TV for at least 15 minutes Degauss the TV set using a specific degaussing coil Set the brightness and contrast to maximum Counter clockwise rotate the R B low brightness potentiometers to the end and rotate the green low brightness potentiometer to center Receive green raster pattern signals Loosen the clamp screw holding the deflection yoke assembly and slide it forward or backward to display a vertical green zone on the screen Rotate and spread the tabs of the purity magnet around the neck of the CRT until the green zone is located vertically at the center of the screen eSlowly move the deflection yoke assembly forward or backward until a uniform green screen is obtained Tighten the clamp screw of the assembly temporarily Check purity of the red raster and blue raster until purities of the three rasters meet the requirement DUMMY WEDGE DEFLECTION PURITY CONVERGENCE DER ECINNM MAGNET MODULE GLASS CLOTH t TAPES 2 1 2 Convergence Adjustment Preparation Before attempting a
21. or hardwire addressing and a total of two devices may be addressed a single bus system The AO and A1 pins are no connects 4 4 3 Memory Organization T24C08 8K SERIAL EEPROM Internally organized with 64 pages of 16 bytes each the 8K requires a 10 bit data word address for random word addressing 4 4 4 Block Diagram 25 Co UU WP SUI START Taa EDA Scaral N LOGIC 1 DEY DATA ADDRESS COMPARATUR A Rn DAA FFERO A 4DDAJCOUNTER a SERIAL MUS 4 5 SWITCH MODE POWER SUPPLY IC STRG5653 4 5 1 General Description The STRGS5653 is part of the STRG5600 series thick film ICs for switch mode power supply incorporating power MOSFET with a high precise error amplifier The ICs feature fewer external components small size and standard power supply 4 5 2 Block Diagram 26 4 5 3 Function of Terminal wee M Symbols Description Functions No 1 D Drain Terminal MOS FET drain 2 5 Source Terminal MOS FET source 3 GND Ground Terminal Ground 4 VIN Power supply Terminal Input of power supply for control 5 O C P F B Overcurrent Feedback Input of overcurrent detection signal 27
22. rted input of differential input stage 4 4 EEPROM 24 08 4 4 1 Features Data EEPROM internally organized as 1024 2048 bytes and 64 128 pagesx16 bytes Page protection mode flexible page by page hardware write protection Additional protection EEPROM of 64 128 bits bit per data page 1 Protection setting for each data page by writing its protection bit Protection management without switching WP pin Low power CMOS Vccz2 7 to 5 5V operation Two wire serial interface bus IIC Bus compatible 24 Filtered inputs for noise suppression with Schmitt trigger Clock frequency up to 400 kHz High programming flexibility Internal programming voltage Self timed programming cycle including erase Byte write and page write programming between 1 and 16 bytes Typical programming time 6ms 1 Oms for up to 16 bytes High reliability Endurance 106 cycles 1 Data retention 40 years 1 ESD protection 4000 V on all pins 8 pin DIP DSO packages Available for extended temperature ranges Industrial 40to 85 Automotive 40to 125 4 4 2 Pin Description SERIAL CLOCK SCL The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device SERIAL DATA SDA The SDA pin is bi directional for serial data transfer This pin is open drain driven and may be wire ORed with any number of other open drain or open collector devices The AT24C08 only uses the A2 input f
23. s data line P2 0 TPWM 4 port 2 0 or Tuning PWM output P3 0 ADCO PWMO 5 port 3 0 or ADCO input or PWMO output 4 2 TFA9842AJ 2 channel audio amplifier with volume control SE 1 W to 7 5 W 4 2 1 General description The TFA9842AJ contains two identical audio power amplifiers The TFA9842AJ can be used as two 21 Single Ended SE channels with a volume control The maximum gain is 26 dB The TFA9842AJ comes in a 9 pin DIL bent SIL DBS9P power package The TFA9842AJ contains a unique protection circuit that is solely based on multiple temperature measurements inside the chip This gives maximum output power for all supply voltages and load conditions with no unnecessary audio holes Almost any supply voltage and load impedance combination can be made as long as thermal boundary conditions number of channels used external heatsink and ambient temperature allow it 4 2 2 Features 2 Channel SE 1 W to 7 5 W operation possibility Soft clipping Input clamps Volume control Standby and mute mode No on off switching plops Low standby current High supply voltage ripple rejection Outputs short circuit protected to ground supply and across the load Thermally protected 4 2 3 Block diagram of TFA9842AJ IN 1 IN2 SIIORT CIRCUIT AND TEMPERATURE PROTECTION vc Volume control TFAS9842AJ MOBUZS GND 22 4 2 4 Pinning 4 2 5 Pin description Symbol Pin Description IN2 1 input 2 OUT2 2
24. t for at least 15 minutes Receive red full field pattern Power on the specific degausser and face it to the TV screen Turn on the degausser Slowly move it around the screen and slowly take it away from the TV Repeat the above steps until the TV is degaussed completely 2 2 2 Confirmation and Adjustment for Voltage Caution B voltage has close relation to high voltage To prevent X ray radiation set B voltage to the rated value The maximal radiator is not GND reason of linking to TP 12V Make sure that the supply voltage is within the range of the rated value Connect a digital voltmeter to the voltage output terminal of the main PCB Power on the TV and set the brightness and sub brightness to minimum Ensure that the voltage from the main PCB reads as follows Regulate voltage adjustment components on the power section until the B the voltage reaches the rated value Test Point Voltage Test Point Voltage TP 115V 117Vx1 5V 18 23 2 15 15 5V 1V 5 5 0 5 TP 3 3V 3 3V 0 3V TP 8V 8V 1V TP 12V 13V 2V TP 12V 13V 2V TP 195V 196 2 Note It s impossible to check the power part separately from the main chassis board as the part is mounted on the main chassis board The power components etc should be checked for burnout when power on If burned out do not power on the TV again until the cause is found out 2 2 3 High Voltage Inspection Measure vol
25. tages of test points on the main PCB with the digital voltmeter Measure the CRT high voltage with the high voltage testing equipment and heater voltage with the high frequency effective voltmeter The rated values are shown as below Test Point Voltage Test Point Voltage Negative of VD49 1 1 96x2V 14 GS CRT anode 22 1 5KV 2 FS CRT anode 26 1 5KV 21 PF CRT anode 27 1 5KV Heater 6 340 3 Vrms 2 2 4 Focus Adjustment Caution Dangerously high voltages are present inside the TV Extreme caution should be exercised when working on the TV with the back removed After removing the back cover look for the FBT on the main PCB There should be a FCB FOCUS on the FBT Power on the TV and preheat it for 15 min Receive a normal TV signal Rotate knob of the FCB until you get a sharp picture 2 25 SERVICE mode To enter the SERVICE mode Set the volume to 0 Then press and hold the MUTE button on the remote control and press the MENU button on the TV to enter the SERVICE mode To exit from the SERVICE mode turn off the TV set by the POWER button on the remote control Caution The user service mode adjustment can be changed only when service personnel adjust the whole set data during servicing As the control data have dramatic effects on functions and performance of the TV service personnel should not tell user how to enter the SERVICE mode to avoid improper data settings Adjustments and bus data
26. te replacement components which do not have the same safety characteristics as specified in the parts list may create X ray radiation 1 3 2 Do not slap or beat the cabinet or CRT since this may result in fire or explosion 1 3 3 Never allow the TV sharing a plug or socket with other large power equipment Doing so may result in too large load causing fire 1 3 4 Do not allow anything to rest on or roll over the power cord Protect the power cord from being walked on modified cut or pinched particularly at plugs 1 3 5 Do not place any objects especially heavy objects and lightings on top of the TV set Do not install the TV near any heat sources such as radiators heat registers stove or other apparatus that produce heat 1 3 6 Service personnel should observe the SAFETY INSTRUCTIONS in this manual during use and servicing of this TV set Otherwise the resulted damage is not protected by the manufacturer 1 4 SAFETY SYMBOL DESCRIPTION An The lightning symbol in the triangle tells you that the voltage inside this product may be strong nough to cause an electric shock Extreme caution should be exercised when working on the TV with the back removed 2 This is an international hazard symbol telling you that the components identified by the symbol have special safety related characteristics UL This symbol tells you that the critical components identified by the UL marking have special safety related characteristics VDE or TUV Th
27. ter 16 bit Data pointer Stand by Idle and Power Down modes 14 bits PWM for Voltage Synthesis Tuning 8 bit A D converter 4 multiplexed inputs for the A D converter and 5 PWM 6 bits outputs for control of TV analogue signals TDA95XX series 4 pins which can be programmed as general I O pin ADC input or PWM 6 bit output TDA93XX series Data Capture Text memory for 1 or 10 pages In the 10 page versions inventory of transmitted Teletext pages stored in the Transmitted Page Table TPT and Subtitle Page Table SPT Data Capture for US Closed Caption 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 16 Comprehensive teletext language coverage Full Field and Vertical Blanking Interval VBI data capture of WST data Display Teletext and Enhanced OSD modes Features of level 1 5 WST and US Close Caption Serial and Parallel Display Attributes Single Double Quadruple Width and Height for characters Scrolling of display region Variabl
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