CONTENTS - e-Rusu
Contents
1. STR ST92195C 48K SW E 7 P MONO STR WSS IC ST92195C 64K SW F 1 P MONO STR APS WSS IC ST92195C 64K SW G 10 2 STV224X Video processor The STV2246 2247 2248 are fully bus controlled ICs for TV including PIF SIF Chroma and deflection processing Used with a vertical frame booster TDA1771 or TDA8174 for 90 chassis STV9306 for 110 chassis they allow the design of multi standard BGDKIMNLL PAL SECAM NTSO sets with very few external components and no manual adjustments PIN CONNECTIONS STV224X 8X SDIP56 VIDEO STEREO PAL SECAM NTSC OK OK OK OK OK OK 10 3 UV1315 UV1316 UV1336 General description of UV1315 The UV1315 tuner belongs to the UV 1300 family of tuners which are designed to meet a wide range of applications It is a combined VHF UHF tuner suitable for CCIR systems B G L and Features of UV1315 e Member of the UV1300 family small sized UHF VHF tuners Systems CCIR B G and OIRT D K e Voltage synthesized tuning VST e Off air channels S cable channels and Hyper band e Standardized mechanical dimensions and pinning PINNING PIN VALUE 1 Gain control voltage AGC 4 0V Max 4 5V 2 Tuning voltage 3 High band switch 5V Min 4 75V Max 5 5V 4 Mid band switch 5V Min 4 75V Max 5 5V 5 Low band switch 5V Min 4 75V Max 5 5V 6 Supply voltage 5V M2. EAHA JO Guiuoyws pueg esa LAHA 40 eq pueg 189 KouenbeJ J AO SSOIO JHA ESHA eq 42 Je o ssoJo Jo HZ4 KouenbeJ J8 0 ss0JO JHA L JHA JO aKa 714 KouenbaeJ 5500 JHA LJHA suoneuej dx3 OLLLOOOL 00010000 01000000 10000000 OLOOLLLL OOLLLOOO OLOOOOLL LLOLOOOO ZHIN SZ 526 Vv00 63daL OLLLOOOL 00010000 01000000 L0000000 01000000 LOLLLOOO OLOOLOLO LLOLOOOO HW 6 ZHN SZ Zv v9cecxeaadaL sdiv OLLLOOOL 00010000 101000000 10000000 0LOOOO0L OLLLLOOO OLOOLOOO LOLLOOOO ZHIN ZH 9 021 9869967620091 OLLLOOOL 00100000 0LOOOO00 L0000000 OLOOOOOL LLLLLOOO 01001000 LOLLOOOO Sz sor ZH 6 021 982969620031 OLLLOOOL 10100001 01 00000 1000000 0L00000L LLOLLOOO OLOOLOOL 10010000 ZH SZ 10 ZHIN LL 009110 uosuiou OLLLOOOL 00100000 101000000 L0000000 101000000 OLLLLOOO OLOOLLOO OOLLOOOO ZHIN SZ Lr ZHIN SC 96 EAN SILEAN sdiliud 5 csd 1589 led ZU bu ZU SINSLINNAI SOIANSS O MV 3HO 3HA ONILLAS 19 20
3. GROUND RAMP GENERATOR BUFFER OUTPUT INVERTING INPUT 0 Vs 1 FLYBACK GENERATOR Ao On OO AO oO Boe 10 6 UC3842 3 General description DESCRIPTION TheUC3842 3 4 5family of control ICs provides the necessary features to implement off line or DC to DC fixed frequency current mode control schemes With a minimal external parts count Internally implemented circuits include under voltage lockout featuring start up current less than 1 mA a precision reference trimmed for accuracy at the error amp input logic to insure latched operation a PWM comparator which also provides current limit control and a totem pole output stage designed to source or sink high peak current The output stage suitable for driving N Channel MOSFETs is low in the off state Differences between members of this family are the under voltage lockout thresholds and maximum duty cycle ranges The UC3842 and UC3844 have UVLO thresholds of 16V on and 10V off ideally suited off line applications The corresponding thresholds for the UC3843 and UC3845 are 8 5 V and 7 9 V The UC3842 and UC3843 can operate to duty cycles approaching 10096 A range of the zero to 50 96 is obtained by the UC3844 and UC3845by the addition of an internal toggle flip flop which blanks the output off every other clock cycle General Features OPTIMIZED FOR OFF LINE AND DC TO DC CONVERTERS LOWSTART UP CURRENT lt 1 mA AUTOMATIC FEED FORWARD COMPENSA TION PULSE BY PULSECURRENT LIMITING E
4. item in AUTOSTORE menu is visible 0 Programme item in AUTOSTORE menu is invisible 0 French OS Channel Table is not available 0 French Channel Table is not available 0 England Channel Table is not available 0 East Europe Channel Table is not available BIT 0 1 West Europe Channel Table is available 1 when B G system is available PTO o west Europe Cnamnel Tabie i not avaianie TX1 Teletext Options NOTE BIT 7 NOT USED 0 default value BIT 6 RESERVED must be 0 0 default value 543 Teletext Language Groups 000 Group 1 West English French Swedish Czech German Portuguese Italien Rumanian 001 Group 2 West East Polish French Swedish Czech German Serbian Italien Rumanian 010 Group 3 West Turkish English French Swedish Turkish German Portuguese Italien Rumanian 011 Group 4 East Cyrillic English Cyrillic Swedish Czech German Serbian Lettish Rumanian 100 Group 5 Arabic English French Swedish Turkish German Hebrew Italien Arabic 2 1 0 Device type selection 000 EPROM M6A 001 ROM H5 P 010 ROMLESS H5 P 011 EPROM M6 R 100 ROM M6 R 101 OSDEPROM M6 R OTP 110 ROM M6 P MASK 111 Read Auto Gain Table for the device from EEPROM Note TX1 option is visible Service Men for only with Text SW Version 18 101 for OTP IC use 110 for MASK IC use AHN 46 eq pueg esd
5. 2 22 03 ie tee i e ei A dee ee tee edes eie a get eda mo abeat le 18 15 5 OP5 ChanrielTabl s e tee e te tee xr ep ed 18 15 6 TXI Teletext OptlOriS cR EE PH Ree Os Gees 18 16 TUNER SETTING eer Gre ctetu esee ane 19 17 CIRCUIT DIAGRAM of VIDEO PRECESSOR 20 CIRCUIT DIAGRAM of SMPS nnne nennen 21 CIRCUIT DIAGRAM of MICRO CONTROLLER 22 22 CIRCUIT DIAGRAM OF VIDEO 3 e E 23 CIRCUIT DIAGRAM of DEFLECTION nnne 24 CIRCUIT BIAGRAM OF CRT eite rte te Cose t ee ee tus i 25 18 WAVEFORMS it de nare recie le e D oce EC duds 20 DO NOT CHANGE ANY MODULE UNLESS THE SET IS SWITCHED OFF The mains supply part of the switch mode power supply s transformer is live Use an isolating transformer The receiver complies with the safety requirements SAFETY PRECAUTIONS The service of this TV set must be carried out by qualified persons only Components marked with the warning symbol on the circuit diagram are critical for safety and must only be replaced with an identical component Power resistor and fused resistors must be mounted in an identical manner to the original component When servicing this TV check that the EHT does not exc
6. and DOC Canada regulations e Low power consumption e Both Phono connector and F connector are available PINNING PIN VALUE 1 Gain control voltage 4 0V Max 4 5V 2 Tuning voltage 3 Address select Max 5 5V 4 Serial cloc Min 0 3V Max 5 5V 5 Serialdata Min 0 3V Max 5 5V 6 Not connected 7 Supply voltage 5 0 Min 4 75V Max 5 5V 8 ADC input optional 9 Tuning supply voltage 33V Min 30V Max 35V 10 Ground 11 IF output 10 4 TDA2822 General Description of TDA2822 The TDA2822 is a mono bridge amplifier specially designed for TV and Portable Radio applications Requires very few external components WIDE SUPPLY VOLTAGE RANGE 3 15V MINIMUM EXTERNAL COMPONENTS NO SVR CAPACITOR NO BOOTSTRAP NO BOUCHEROT CELLS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION PINNING Output 1 Vcc Output 2 Gnd Input 2 Input 2 Input 1 Input 1 QUO Or Ae o 10 5 TDA8174AW INDEPENDENT VERTICALAMPLITUDE ADJUSTEMENT BUFFER STAGE POWER AMPLIFIER FLYBACKGENERATOR THERMALPROTECTION INTERNAL REFERENCE VOLTAGE DECOU PLING General Description TDA8174Aand TDA8174AWare a monolithic integrated circuits It is a full performance and very efficient vertical deflection circuit intended for direct drive of a TV picture tube in Color and B amp W television as well as in Monitor and Data displays PINNING POWER OUTPUT OUTPUT STAGE Vs TRIGGER INPUT HEIGHTADJUSTMENT VOLTAGE REF DECOUPLING
7. equipped with a 21 pin Eu Scart connector 2 SMALL SIGNAL PART WITH STV2248 STV2248 video processor is essential for realizing all small signal functions for a color TV receiver 2 1 Vision IF Amplifier3 The vision IF amplifier can demodulate signals with positive and negative modulation The PLL demodulator is completely alignment free Although the VCO Toko coil of the PLL circuit is external yet the frequency is fixed to the required value by the original manufacturer thus the Toko coil does not need to be adjusted manually The setting of the various frequencies 38 9 or 45 75 MHz can be made via changing the coil itself 2 2 QSS Sound Circuit QSS Versions The sound IF amplifier is similarto the vision IF amplifier and has an external AGC de coupling capacitor The single reference QSS mixer is realised by a multiplier In this multiplier the SIF signal is converted to the inter carrier 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
8. output via the volume control 2 3 AM DEMODULATOR The AM demodulated signal results from multiplying the input signal by itself it is available on AM FM output 2 4 FM Demodulator and Audio Amplifier Mono Versions The FM demodulator is realized as narrow band PLL with external loop filter which provides 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 Forthis reason the inter carrier 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 that uses the clock frequency of the p controller Teletext decoder as a reference The setting to the wanted frequency is realized by means of the software 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 is realized by means of a software loop that alternate the demodulator to various frequencies then select the frequency on which a lock condition has been found De emphasis output signal amplitude is independent of the TV standard and has the same value for a frequency deviation of x25 kHz at the 4 5 MHz standard and for a deviation of 50 kHz for
9. 75M PAL B G MONO K2966M PAL SECAM B G D K MONO J1981 PAL I K2966M PAL SECAM B G D K I l MONO K2962M PAL SECAM B G D K I L L MONO L9653 Secam L L audio M1962M PAL M N NTSC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM ST92195 STV224X e TUNER UV1315 UV1316 UV1336 TDA2822 e TDA8174A e UC3842 3 e 24 08 e SAWFILTERS G1975M K2966M K2962M M1962M 10 1 ST92195 The ST92195 is a member of the ST9 family of micro controllers completely developed and produced by SGS THOMSON Microelectronics using a proprietary n well HCMOS process The nucleus of the ST92195 is the advanced Core which includes the Central Processing Unit CPU the ALU the Register File and the interrupt controller The Core has independent memory and register buses to add to the efficiency of the code A set of on chip peripherals form a complete sys tem for TV set and VCR applications e Voltage Synthesis e VPS WSS Slicer e Teletext Slicer e Teletext Display RAM e OSD Additional peripherals include a watchdog timer a Serial peripheral interface SPI a 16 bit timer and an A D converter MICROCONTROLLER PIN DESCRIPTION tan u CONTROLLER VERSION TABLE FEATURE DESCRIPTION NO TXT MONO IC ST92195C 48K SW A NO TXT MONO IC ST92185B SW B 1 P MONO IC ST92195C 48K SW D P
10. ALACCESS CMOS 8K EEPROM 24008 sss eene nennen nennen nennen nns 6 9 SAW RILTERS E 6 10 IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM 6 10 1 ST92195 D ces ote ples Ae a ed rop e ftue t ard 6 7 10 2 STV224X 550 dete 7 10 3 0V1315 U0V1316 UV 1330 ipo ee dette 8 9 10 4 TDA2822 oe RR reU etie reris ier teres 9 10 5 TDAS1 4AW eet eee esr ee EI oet cae dar eor 9 10 6 0C39842 3 N A crt ene haer ani ce terc de eene ete ree etre ate eR RD 10 10 7 E Eprom 24C O8 10 Saw MISH set ede dates 11 11 GENERAL BLOCK DIAGRAM cte rte to i teg E reta eo er 12 12 AK36 TITANIUM TELETEXT Language Groups 13 13 AK36 CHASSIS MANUAL ADLUSTMENT PROCEDURE sse eene 14 14 SERV CE AD GUS Sees stet betonte tal cor f deeds seti 15 16 15 OPTION LIST EPI 17 15 31 OP1 Peripheral Options mri eres t c re coc eene e deans 17 15 2 OP2 Reception Standard Options 17 15 3 OPS Video Options ton re i nes RN Ee i d odes dade e iis diame 17 154 OPA4 TV Features
11. CONTENTS SAFETY PREGAUTIONS tod edite dp re SERT Hr eid p RIS iene deter 2 Ix ziniaUie icm 2 JN m 2 2 SMALLSIGNAL PART WITH STV2248 ssssssssssssssseeeeee eene nnne nennen nennen nsns 3 2 1 VISION IE beet te erect rito Per bee tbe Le Seele reme etd 3 22 QSSSoundCircuit QSS Versions 3 2 5 AM Demodulator seer e ees te te metet edere nde GS 3 24 FM Demodulator and Audio Amplifier Mono Versions 3 25 Video SW ONN ocio reto nie eere Hem 3 26 Synchronization Circuit ete ceti eed e eite etd 3 2 7 Chroma and Luminance Processing ccccccccceccssssseeeeeecececceeseeseeasseseeeeeeeeeeeeeeeeeseseasaeeeeeeeeseeeetes 4 2 8 RGB ee aetate ac ee si eis Sd eet 4 2 9 URCOntrOller ETE 4 XE zd LL 5 4 SOUND OUTPUT 2822 Ea a AACA 5 5 VERTICAL OUTPUT STAGE WITH 8174 5 6 POWER SUPPEY SMBSY neuf Pedir ret re ee n ad eedem ee 5 17 DISCRETE VIDEO AMPLIFIER tede ode teer o dei cce PE 5 8 SERI
12. CTURE button from remote controller to switch to 16 9 picture mode on service menu Change Vertical Size till the picture becomes 16 9 format Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done Vertical Position VP2 Enter a NTSC M circle test pattern via RF or video inputs Change Vertical Position till the test pattern is vertically centred Horizontal line at the centre pattern is in equal distance both to upper and lower side of the picture tube Check and readjust Vertical Position item if the adjustment becomes improper after some other geometric adjustments are done Horizontal Position HP2 Enter a NTSC M circle test pattern via RF or video inputs Change Horizontal Position till the picture is horizontally centred Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done 60 Hz NTSC PICTURE ADJUSTMENTS RGB MODE Horizontal Position RGBH Enter a RGB circle test pattern via video inputs Force the TV to RGB mode by pressing AV button from remote controller Change RGB Horizontal Position till the picture is horizontally centred Check and readjust RGBH item if the adjustment becomes improper after some other geometric adjustments are done 50 Hz 4 3 Geometry Adjustment 60 Hz 4 3 Geometry Adjustment E m 60 Hz 16 9 Geometry Adjustment OPTION SETTINGS Select concerned OPTION fr
13. Input HIGH voltage Min Vcc 0 5 Vcc 1 8 Supply voltage Min 2 5V 5 5V 10 Saw filter s list K2962 K2966 PAL BG VIDEO AUDIO G1975M PS BG DK K2966M PAL J1981 PSBGDKK II K2966M PSBGDKK LL PINNING 1 Input 2 Input ground 3 Chip carrier ground 4 Output 5 Output L9653M PINNING 1 Input 2 Switching Input 3 Chip carrier ground 4 Output 5 Output K2962M 11 TIVLNOZIHOH 14 995 Y Y SLINDYID 9NIHOLIMS 55 0 duly yeeu0siq 15 ccscva L lt _ AZL lt lt Cv9 on YOSNOS dl YATIONLNOD 9612615 QVdA3M 9LEL SLELAN YANNL ISA Tid 9EMVLL SISSVHO JO INV3H9VIG 320718 IWYANAD 12 AK36 TITANIUM TELETEXT Languages Groups GROUP 1 WEST ENGLISH FRENCH SWEDISH CZECH GERMAN PORTUGUESE ITALIAN RUMANIAN GROUP 2 WEST EAST POLISH FRENCH e SWEDISH CZECH GERMAN e SERBIAN ITALIAN RUMANIAN GROUP 3 WEST TURKEY ENGLISH FRENCH SWEDISH TURKISH GERMAN PORTUGUESE ITALIAN e RUMANIAN GROUP 4 EAST CYRILLIC ENGLISH e CYRILLIC SWEDISH CZECH GERMAN e SERBIAN e LETTISH RUMA
14. MHz that requires the chroma Reference frequency 4 43MHz or 3 58MHz crystal oscillator reference signal a divider by 768 a line decoder and a phase comparator PLL2 The second phase locked loop that controls the phase of the horizontal output Compensation of horizontal deflection transistor storage time variation Also the horizontal position adjustment is also performed in PLL2 A vertical pulse extractor A vertical countdown system to generate all vertical windows vertical synchronization window frame blanking pulses 50 60Hz identification window Automatic identification of 50 60Hz scanning PLL1 time constant control Noise detector video identification circuits and horizontal coincidence detector Vertical output stage including de interlace function vertical position control Vertical amplitude control voltage output combined with chroma reference output and Xtal 1 indication 3 2 7 Chroma and Luminance Processing The chroma decoder is able to demodulate PAL NTSC and SECAM signals The decoder dedicated to PAL and NTSC sub carrier is based on a synchronous demodulator and an Xtal PLL locked on the phase reference signal burst The SECAM demodulation is based on a PLL with automatic calibration loop The color standard identification is based on the burst recognition Automatic and forced modes be selected through the I2C bus NTSC tint and auto flesh are controlled through I2C b
15. NHANCED LOAD RESPONSE CHARAC TERISTICS UNDER VOLTAGELOCKOUTWITHHYSTER ESIS DOUBLE PULSE SUPPRESSION HIGH CURRENT TOTEMPOLE OUTPUT INTERNALLY TRIMMED BANDGAP REFER ENCE 500 KHz OPERATION LOWRO ERRORAMP PINNING PIN VALUE 1 Comp Compensation input 2 Error amplifier input Regulation 3 Sense Over current protection voltage 1V typ 4 Rt Ct Timing network 5 Ground 6 Output MOSFET driver 7 Supply voltage 8 Vref 5V Reference output 10 7 E Eprom 24CO8 General description The 24C08 is a 8Kbit electrically erasable programmable memory EEPROM organized as 4 blocks of 256 08 bits The memory operates with a power supply value as low as 2 5V Features e Minimum 1 million ERASE WRITE cycles with over 10 years data retention e Single supply voltage 4 5 to 5 5V e Two wire serial interface fully compatible e Byte and Multi byte write up to 8 bytes e Page write up to 16 bytes e Byte random and sequential read modes e Selftimed programming cycle PINNING PIN VALUE 1 Write protect enable 0V 2 Not connected 0V 3 Chip enable input 0V 4 Ground 0V 5 Serial data address input output Input LOW voltage Min 0 3V 0 3 Vcc Input HIGH voltage Min 0 7 Vcc 1 6 Serial clock Input LOW voltage Min 0 3V 0 3 Vcc Input HIGH voltage 0 7 Vcc Vcc 1 7 Multibyte Page write mode Input LOW voltage Min 0 3V Max 0 5V
16. NIAN GROUP 5 ARABIC ENGLISH FRENCH SWEDISH TURKISH GERMAN HEBREW ITALIAN e ARABIC Using Coloured Buttons RED No function GREEN Is used to switch the aspect ratio between 4 3 and 16 9 YELLOW Is used to prepare the system for screen adjustments BLUE No function 13 AK36 CHASSIS MANUAL ADJUSTMENT PROCEDURE In order to enter service menu first enter the main menu and then press the digits 4 7 2 and 5 respectively To select adjust parameters use A or v buttons To change the selected parameter use lt or gt buttons Selected parameter will be highlighted Entire service menu parameters of AK36 CHASSIS are listed below For some of parameters the default values are given on the same table REGISTER OSD IF1 IF2 IF3 IF4 AGC VLIN VS1A VS1B VP1 HP1 VS2A VS2B VP2 HP2 RGBH WR WG WB BR BG APR FMP1 NIP1 SCP1 FMP2 NIP2 SCP2 F1H FAL F2H F2L BS1 BS2 BS3 OP1 OP2 4 5 PARAMETER OSD Horizontal Position IF Coarse Adjust IF Fine Adjust IF Coarse Adjust for L Prime IF Fine Adjust for L Prime Automatic Gain Control Vertical Linearity Vertical Size for 50 Hz 4 3 Vertical Size for 50 Hz 16 9 Vertical Position for 50 Hz Horizontal Position for 50 Hz Vertical Size for 60 Hz 4 3 Vertical Size for 60 Hz 16 9 Vertical Position for 60 Hz Horizontal Position for 60 Hz RGB Horizontal Shift Offset White Point Adjust for RED Whit
17. ORIZONTAL POSITION COMPENSATION 40 40 40 31 31 10 9 STEREO ONLY 20 STEREO ONLY 13 STEREO ONLY 13 STEREO ONLY 16 STEREO ONLY 13 STEREO ONLY MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table MEANINGFUL FOR ONLY PLL TUNER see tuner setting table PERIPHERAL OPTIONS see option table RECEPTION STANDART OPTIONS see option table VIDEO OPTIONS see option table TV FEATURE OPTIONS see option table CHANNEL TABLE OPTIONS see option table TELETEXT OPTIONS see option table 14 USING COLOUR BUTTONS ON SERVICE MENU RED BUTTON For Stereo models only It switches the AVL to ON or OFF mode on service menu AVL word is visible on service menu when AVL is on GREEN BUTTON It switched the PICTURE MODE to 4 3 or 16 9 on service menu It is usefull when it is necessary to adjust 16 9 picture mode vertical size YELLOW BUTTON It switches to VERTICAL SCAN DISABLE mode It is usefull to adjust screen voltage BLUE BUTTON It is used to adjust AGC and IF automatically on service menu WHITE BALANCE ADJUSTMENT The following three parameters are used to make white balance adj
18. VS1B Enter a PAL B G circle test pattern via RF Enter service menu and press GREEN PICTURE button from remote controller to switch to 16 9 picture mode on service menu Change VS1B Vertical Size till the picture becomes 16 9 format Check and eadjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done Vertical Position VP 1 Enter a PAL B G circle test pattern via RF Change Vertical Position till the test pattern is vertically centred Horizontal line at the centre pattern is in equal distance both to upper and lower side of the picture tube Check and readjust Vertical Position item if the adjustment becomes improper after some other geometric adjustments are done Horizontal Position HP 1 Enter a PAL B G circle test pattern via RF Change Horizontal Position till the picture is horizontally centred Check and readjust Horizontal Position item if the adjustment becomes improper after some other geometric adjustments are done 50 Hz PAL PICTURE ADJUSTMENTS Vertical Size VS2A Enter a NTSC M circle test pattern via RF or video inputs Change Vertical Size till the checkered parts of test pattern on both of upper and lower side dissappear Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done Vertical Size VS2B Enter a NTSC M circle test pattern via RF or video inputs Enter service menu and press GREEN PI
19. VST Tuner Channel coverage of UV1316 OFF AIR CHANNELS CABLE CHANNELS BAND CHANNELS FREQUENCY RANGE MHz CHANNELS FREQUENCY RANGE MHz Low Band E2 toC 48 25 to 82 25 1 S01 to 508 69 25 to 154 25 Mid Band E5 to E12 175 25 to 224 25 S09 to 538 161 25 to 439 25 High Band E21 to E69 471 25 to 855 25 2 1 Enough margin is available to tune down to 45 25 MHz 2 Enough margin is available to tune up to 863 25 MHz 539 to 541 447 25 to 463 25 Noise Typical Max Gain Min Typical Max Low band 5dB 9dB All channels 38dB 44dB 52dB Mid band 5dB 9dB Gain Taper of air channels 8dB High band 6dB 9dB Channel Coverage UV1336 BAND CHANNELS FREQUENCY RANGE MHz Low Band 20 55 25 to 139 25 Mid Band E to PP 145 25 to 391 25 High Band QQQ to 69 397 25 to 801 25 Noise is typically for all channels Gain is minimum 38dB and maximum 50 for all channels Channel Coverage of UV1315 OFF AIR CHANNELS CABLE CHANNELS BAND CHANNELS FREQUENCY RANGE MHz CHANNELS FREQUENCY RANGE MHz Low Band E2 to C 48 25 to 82 25 1 S01 to 508 69 25 to 168 25 Mid Band E5 to E12 175 25 to 224 25 511 to 539 231 25 to 447 25 High Band E21 to E69 471 25 to 855 25 2 540 to 541 455 25 to 463 25 1 Enough margin is available to tune down to 45 25 MH
20. e Point Adjust for GREEN White Point Adjust for BLUE Bias for RED Bias for GREEN APR Threshold FM Prescaler when AVL is OFF NICAM Prescaler when AVL is OFF SCART Prescaler when AVL is OFF FM Prescaler when AVL is ON NICAM Prescaler when AVL is ON SCART Prescaler when AVL is ON High Byte of crossover frequency for VHF1 VHF3 Low Byte of crossover frequency for VHF1 VHF3 High Byte of crossover frequency for VHF3 UHF Low Byte of crossover frequency for VHF3 UHF Band Switch Byte for VHF1 Meaningful for only Band Switch Byte for VHF3 Meaningful for only Band Switch Byte for UHF Meaningful for only Control Byte Meaningful for only PLL Tuner Option 1 see the Option List Option 2 see the Option List Option 3 see the Option List Option 4 see the Option List Option 5 see the Option List Teletext Option 1 see the Option List NOTE NUMBERS ARE DEFAULT VALUES FOR CONCERNED ARAMETER ADJUST HORIZONTAL POSITION FOR OSD IF1 Adjust Course Neg Adj WO L IF2 Adjust Fine Neg Adj WO L IF3 Adjust Course Pos Adj W 1 IF4 Adjust Fine Pos Adj W L AGC Adjust AGC ADJUST VERTICAL LINEARITY ADJUST VERTICAL SIZE FOR 4 3 MODE 50 HZ ADJUST VERTICAL SIZE FOR 16 9 MODE 50 HZ ADJUST VERTICAL POSITION 50 HZ ADJUST HORIZONTAL POSITION 50 HZ ADJUST VERTICAL SIZE FOR 4 3 MODE 60 HZ ADJUST VERTICAL SIZE FOR 16 9 MODE 60 HZ ADJUST VERTICAL POSITION 60 HZ ADJUST HORIZONTAL POSITION 60 HZ CVBS RGB H
21. eed 26kV TV set switched off Make short circuit between HV CRT clip and CRT ground layer Short C808 before changing 841 or other components in primary side of the SMPS part Measurements Voltage readings and oscilloscope traces are measured underthe following conditions Antenna signal s level is 60dB at the color bar pattern from the TV pattern generator 100 white 75 color saturation Brightness contrast and color are adjusted for normal picture performance Mains supply 220VAC 50Hz PERI TV SOCKET 20 18 16 14 12 108 6 4 2 2119171513119 7 5 3 1 SCART 1 PINING 1 Audio right output 0 5Vrms 1K 2 Audio right input 0 5Vrms 10K 3 Audio left output 0 5Vrms 1K 4 Ground AF 5 Ground Blue 6 Audio left input 0 5Vrms 10K 7 Blue input 0 7Vpp 75ohm 8 AV switching input 0 12VDC 10K 9 Ground Green 10 11 Green input 0 7Vpp 75ohm 12 13 Ground Red 14 Ground Blanking 15 Red input 0 7Vpp 75ohm 16 Blanking input 0 0 4VDC 1 3VDC 75 Ohm 17 Ground CVBS output 18 Ground CVBS input 19 CVBS output 1Vpp 75ohm 20 CVBS input 1Vpp 75ohm 21 Ground 1 INTRODUCTION 11AK36 is a 90 chassis capable of driving 14 tubes at the appropriate currents The chassis is capable of operating in PAL SECAM and NTSC standards The sound system is capable of giving 3 watts RMS output into a load of 16 ohms One page and US Closed Caption is also provided The chassis is
22. in 4 75V Max 5 5V 7 Not connected 8 Not connected 9 Not connected 10 Symmetrical IF output 1 11 Symmetrical IF output 2 Band switching table BAND Low Band Mid Band High Band General description of UV1316 The UV1316 tuner belongs to the UV 1300 family of tuners which are designed to meet a wide range of applications It is a combined VHF UHF tuner suitable for CCIR systems B G and Features of UV1316 Member of the UV1300 family small sized UHF VHF tuners Systems CCIR B G L and OIRT D K Digitally controlled PLL tuning via IC bus Off air channels S cable channels and Hyper band World standardized mechanical dimensions and world standard pinning Complies to CENELEC EN55020 and EN55013 PINNING PIN VALUE 1 Gain control voltage AGC 4 0V Max 4 5V 2 Tuning voltage 3 address select Max 5 5V 4 C bus serial clock Min 0 3V Max 5 5V 5 serial data Min 0 3V Max 5 5V 6 Notconnected 7 PLL supply voltage 5 0 Min 4 75V Max 5 5V 8 ADC input 9 Tuner supply voltage 33V Min 30V Max 35V 10 Symmetrical IF output 1 11 Symmetrical IF output 2 General description of UV1336 UV1336 series is developed for reception of channels broadcast in accordance with the M N standard Features of UV1336 e Global standard pinning e Integrated Mixer Oscillator amp PLL function Conforms to CISPR 13 FCC
23. l Configuration 00 PAL only WO NTSC Playback BIT 6 00 1 Xtal PAL 4 43 01 PAL only W NTSC Playback 01 2 Xtal PAL NTSC 4 43 3 58 02 PAL SECAM W NTSC Playback 10 1 Xtal PAL SEC NTSC 4 43 03 PAL SECAM W NTSC Playbak 11 2 Xtal PAL SEC NTSC 4 43 3 58 0 blank back when no signal in AV mode 0 White Insertion is OFF 1 Blue Background when no signal in TV mode gt gt 0 Disable Blue Background in TV mode 0 Solid Menu background for OSD 0 Black Stretch is OFF 0 APR is OFF 17 OP4 TV Features NOTE BIT 7 1 Headphone 5 available for STEREO models Stereo Models only 0 Headphone is not available 1 BIT 6 1 Arabic Persian is available in menu languages 0 Arabic Persian is not available in menu languages BIT 5 1 Hebrew is available in menu languages 0 Hebrew is not available in menu languages 0 Hotel Mode can not be activated if 1 HP line is visible on sound Men BIT 4 1 Hotel Mode can be activated 0 defauld value D No Signal Timer is enabled min countdown and switch off when no signa 0 No Signal Timer is disabled 1 defauld value BIT 2 1 Frequency based search for PLL tuner selected needs to select also channel 0 Channel table based search for PLL tuner Tables from OPT 5 BIT 1 1 3 band tuning VHF1 VHF3 UHF 1 default value D BIT 0 Extra 200 msec blanking for V default value OP5 Channel Tables NOTE 0 no extra blanking 1 Programme
24. n from remote controller Select the BAND VHF 1 C1 C4 for PLL tuners and standart as L L for PLL Tuner Enter service menu Select IF1 parameter from service menu and press BLUE INSTALL button from remote controller IF adjustment will be done automatically by software See the IF indicator on service menu it must be like on FIGURE 1 shown above OSD HORIZONTAL POSITION ADJUSTMENT Select OSD parameter on service menu Adjust the horizontal position of OSD to the middle of screen by using the reference bar on bottom of service menu OSD adjust also Horizontal position for text screen TELETEXT BRIGHTNESS ADJUSTMENT Set the TV set to a channel with TeleText Enter service menu Press TEXT button from remote controller Adjust BRIGHTNESS parameter to value 30 by using left right buttons from remote controller Press TV button and MENU button from remote controller respectively Adjustment is done 15 Vertical Linearty VLIN Enter a PAL B G circle test pattern via RF Change VLIN till you see circle as round as possible Vertical Size VS1A Enter a PAL B G circle test pattern via RF Change VS1A Vertical Size till horizontal black lines on both the upper and lower part of the test pattern become very close to the upper and lower horizontal sides of picture tube and nearly about to disappear Check and readjust Vertical Size item if the adjustment becomes improper after some other geometric adjustments are done Vertical Size
25. om service menu To change a bit on selected option press the same number from remote controller So this bit will be changed from 1 to 0 or from 0 to 1 If any option is selected on service menu you will see an indicator row shows you the bit numbers OP1 Peripheral Options NOTE BIT 7 NOT USED 0 default value BIT 6 1 Display AV 3 as F AV FAV or BAV IN selection option 0 Display AV 3 as B AV BIT 5 1 Turn back TV mode after the last AV with AV key 1 defauld value 0 Turn back first AV mode after the last AV 0 SVHS is NOT available in AV key stream 1 RGB is available in AV key stream 1 if AV 1 is selected 0 RGB is NOT available in AV key stream BIT 2 1 AV 3 is available in AV key stream 1 if FAV IN or BAV IN available 0 AV 3 is NOT available in AV key stream 1 AV 2 is available in AV key stream if SCART 2 available 0 AV 2 is NOT available in AV key stream BIT 0 1 AV 1 is available in AV key stream 1 if SCART 1 available 0 AV 1 is NOT available in AV key stream OP2 Reception Standard Options NOTE 0 4 5 button keyboard V V P P Menu 0 L L is not available 0 Lis not available BIT 4 1 DK is available 1 if TV system inculude DK 0 DK is not available BIT 3 1 BG is available 1 if TV system inculude BG 0 is notavailable BIT 2 RESERVED Keep as 0 0 default value BIT 1 RESERVED Keep as 0 0 default value RESERVED Keep as 0 0 default value OP3 Video Options BIT 7 Xta
26. rnal R G B inputs for OSD and Teletext display The main functions of the video part are Y U V inputs with integrated clamp loop allowing a DC link with YUV outputs External RGB inputs RGB to YUV conversion or direct YUV inputs Y U V switches Contrast saturation brightness controls YUV to RGB matrix OSD RGB input stages with contrast control RGB switches APR function DC adjustment of red and green channels Drive adjustments R G B gain Digital automatic cut off loop control Manual cut off capability with I2C adjustments Half tone oversize blanking external insertion detection blue screen Blanking control and RGB output stages 2 9 y Controller The ST92195 is the micro controller which is required for a color TV receiver ST92195D1 is the version with one page Teletext The IC has the supply voltages of 5 V and they are mounted in PSDIP package with 56 pins p Controller has the following features Display ofthe program number channel number TV Standard analogue values sleep timer parental control and mute is done by OSD Single LED for standby and on mode indication e System configuration with service mode 3levellogic output for SECAM and Tuner band switching 3 TUNER Either a PLL or a VST tuner is used as a tuner UV1316 VHF UHF is used as a PLL tuner For only PALM N NTSC M applications UV 1336 is used asthe PLL tuner UV 1315 VHF UHF is used as a
27. the other standards When the IF circuit is switched to positive modulation the internal signal on de emphasis pin is automatically muted The audio control circuit contains an audio switch and volume control In the mono inter carrier sound versions the Automatic Volume Leveling AVL function can be activated The pin to which the external capacitor has to be connected depends on the IC version For the 90 types the capacitor is connected to the EW output pin pin 20 When the AVL is active it automatically stabilizes the audio output signal to a certain level 2 5 Video Switching The video processor STV2248C has three CVBS inputs and two RGB inputs The first CVBS input is used for external CVBS from SCART 1 the second is used for either CVBS from FAV and the third one is used for internal video The selection between both external video inputs signals is realized by means of software switches 2 6 Synchronization Circuit The video processor STV224X performs the horizontal and vertical processing The external horizontal deflection circuit is controlled via the Horizontal output pulse HOUT The vertical scanning is performed through an external ramp generator and a vertical power amplifier IC controlled by the Vertical output pulse VOUT The main components of the deflection circuit are PLL1 the first phase locked loop that locks the internal line frequency reference on the CVBS input signal It is composed of an integrated VCO 12
28. us Xtal PLL can handle up to 3 crystals to work in PAL M PAL N and NTSC M for South America ACC an ACC overload control the chroma sub carrier amplitude within 26dB range Both ACC s are based on digital systems and do not need external capacitor All chroma filters are fully integrated and tuned via a PLL locked on Xtal VCO signal second PLL is used for accurate fine tuning of the SECAM bell filter This tuning is achieved during the frame blanking An external capacitor memorizes the bell filter tuning voltage A base band chroma delay line rebuilds the missing color line in SECAM and removes transmission phase errors in PAL The base band chroma delay line is clocked with 6MHz signal provided by the horizontal scanning VCO The luminance processor is composed of a chroma trap filter a luminance delay line a peaking function with noise coring feature a black stretch circuit Trap filter and luminance delay lines are achieved with the use of bi quad integrated filters auto aligned via a master filter phase locked loop 2 8 RGB output circuit The video processor performs the R G B processing There are three sources 1 Y U V inputs coming from luma part Y output and chroma decoder outputs R Y B Y outputs 2 External R G B inputs from SCART converted internally in Y U V with also the possibility to input YUV signals from a DVD player YUV specification is 0 7 V PP U 0 7 V PP V 0 7V PP for 100 color bar 3 Inte
29. ustment To do this use a Colour Analyser Using WR White point adjust for RED WG White point adjust for GREEN WB White point adjust for BLUE parameters insert the sign in the square which is in the middle of the screen The suggested values for these parameters are given on the table above AGC ADJUSTMENT In order to do AGC adjustment enter a 60dBmV RF signal level from channel C 12 224 25 MHz Select AGC parameter from service menu Press BLUE INSTALL button from remote controller The adjustment will be done automatically by software See the AGC indicator on service menu it must be 1 Check that picture is normal at 90dBmv signal level 1 IF INDICATOR AGC INDICATOR o IF NEGATIVE ADJUSTMENT WITHOUT L SYSTEMS Set the video pattern to a PAL colour bar pattern with frequency 38 9 MHz Apply this IF signal to PIN 10 and PIN 11 of tuner Press PROG 1 and after that BLUE INSTALL button from remote controller Select the standart as BG orl if BG is not available Enter service menu Select IF1 parameter from service menu and press BLUE INSTALL button from remote controller IF adjustment will be done automatically by software See the IF indicator on service menu it must be like on FIGURE 1 shown above IF POSITIVE ADJUSTMENT WITH L SYSTEMS Set the video pattern to a SECAM L colour bar pattern with frequency 33 9 MHz Apply this IF signal to PIN 10 and PIN 11 of tuner Press PROG 1 and after that BLUE INSTALL butto
30. z 2 Enough margin is available to tune up to 863 25 MHz Noise Typ Max Gain Min Max Low band 6dB 9dB All Channels 38dB 44dB 50 Mid band 6dB 10dB Gain Taper 8dB High band 6dB off air channels 4 SOUND OUTPUT STAGE TDA2822 TDA2822 is used as the AF output amplifier It is supplied by 12VDC coming from a separate winding in the SMPS transformer An output power of 3W THD 10 can be delivered into an 16 ohm load 5 VERTICAL OUTPUT STAGE WITH TDA8174A The TDA8174A is a power amplifier circuit for use in 90 and 110 colour deflection systems for 25 to 200 Hz field frequen cies and for 4 3 and 16 9 picture tubes 6 POWER SUPPLY SMPS The DC voltages required at various parts of the chassis are provided by an SMPS transformer controlled by the IC UC3842 3 which is designed for driving controlling and protecting switching transistor of SMPS The transformer produces 115V for FBT input 12V for audio output IC S 5V and 8V for ST92195 7 DISCRETE VIDEO AMPLIFIER Three high voltage high frequency transistor is used for RGB amplifier This application works on fixed AC and DC gains 5 8 SERIAL ACCESS CMOS 8K EEPROM 24C08 The 24C08 is a 8Kbit electrically erasable programmable memory EEPROM organized as 4 blocks of 256 08 bits The memory is compatible with the standard two wire serial interface which uses a bi directional data bus and serial clock 9 SAW FILTERS Saw filter type Model G19
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