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Brown goods TV SETS 14", 21" STV2248 chasis
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1. 6 2 Menu Controlled Function 6 2 1 General Menu Operations To minimize the number of keys on remote the less frequent used functions are only accessible via menus These menus are controlled by following keys w MENU button select the diffirent menus It is also used to return from a submenu to menu w P P keys for selecting items in a particular menu w V and V keys for changing the value of selected item w OK key to enter a Sub menu 6 2 2 PICTURE MENU If press the Menu key for the first time we can get Picture menu The Picture menu has following items a Brightness 64 Steps b Contrast 64 Steps c Colour 64 Steps d Sharpness 16 Steps TINT Only for NTSC 64 Steps These items could be selected through P P keys Item value can be modified by V V keys The graphic and numeric display of the control level of selected item is displayed at the bottom of the screen 254 41 v a 6 2 3 SOUND MENU If the Menu key is pressed for the second time we can get Sound menu The Sound menu has following items a Bass 64 Steps b Treble 64 Steps c Balance 64 Steps d Volume 16 Steps These items can be selected through P P keys Item value can be modified by V V keys The graphic and numeric display of the control level of selected item is displayed at the bottom of the screen 41 M 6 2 4 INSTALL MENU The Install menu has followi
2. MODE TV AV1 RGB AV2 S VHS 4 6 KEYBOARD INPUT It is ADC input of the micro The Voltage at the select ADC Pin of the micro is monitored and depending on the voltage value at this pin it is decided as to which key is pressed KEY PRESSED Volume 120 ohm Volume 270 ohm Program 470 ohm 2 3 2 1V MENU 1 Kohm OK 1 5 Kohm AV TV 2 2 Kohm 3 8 4 2V Analog 3 3 Kohm 4 7 Power mode control The STD BY Output specifies if the set is in Stanbby mode or operating mode STD BY Mode Pin 6 Standby Operating 4 8 2 Lines Pins 19 SDA and 20 SCL of the MCU are the I2C Lines The I2C bus is a 2 wire bidirectional bus 5 has an on chip bit level I2C interface This means the hardware takes the bus arbitration the reception and transmission of data bits and generation of START and STOP condition The software must handle the bits i e save a received bit and prepare the bits which must be transmitted 5 supports bytes EEPROM ST24C08 used for storage of analog controls Service settings Alarm Settings tuning data for 99 pre selected programmes and label for each of them The I2C address of the EEPROM is shown in the next chapter The Video processor STV223X 4X is controlled via I2C on address 8A hex 4 9 Design pin 7 It is available to enter SERVICE MENU when it is high for the voltage at pin 7 of MCU It is forbidden to enter the SERVICE MENU
3. P P key in different columns have different significance For Pr V V keys select the program All the following information gets tagged to the selected program For Label V V keys select the character to set and P P keys give access to alphanumeric characters in the sequence A to Z SPACE and 0 to 9 The label hence gets tagged to the particular program For Colour Select Colour standard as AUTO PAL SECAM NTSC1 4 43MHz NTSC2 3 58MHz The Standard selected gets tagged to the particular program For RF Std Select RF standard as BG DK I MN For Asia or BG DK LL for EUROPE The Standard selected gets tagged to the particular program For Skip To Skip or not the particular channel by pressing P P keys For Super sense Enable disable In Organize menu you can MOVE or DELETE a program For MOVE You can move one program to another In that case all the tuning info Label Picture info RF Std Info Skip info and super sense info are transferred from Source Program to destination Program Say if you want to move program 2 to program 7 slelect the corresponding Pr 2 Source by Pressing PP key The color of the selected line changes Now press V V key to go to Pr 7 Destination and press PP key Pr 2 will move to Pr 7 Select Program to be deleted using P P key and press AV Key If the Function is selected and press OK key the Function submenu will displayed As one of the items
4. 20 37 JTRSTO VDD 21 36 GND JIDO 22 35 AGND WSCF 23 34 TELETEXT WSCR 24 33 WSS ADD 25 32 JTNS TESTO 26 31 A DD2 27 30 COB 28 29 TXCF 4 5792195 PIN DESCRIPTION L pm PinName E O Function 1 IR Input 3 RESET RESET Hardware Reset Nc o MU meou L POS Ne HO Nor Used onor STANDBY OUTPUT 8 927 J SCARTI 1 Identifyscartentering 9 o Po SCART 1 ldentfrscartentering 10 9 AVSL AVSELECTON ERK ex e ex 2 6 Ss O AVIV k 16 G G OSD Green colour Signal R OSB Red colour Signal 18 BLANK BLANK O OSDBlankingOutut o O cek ine o mo 22 JTDO JTDO Test Pin 5 AnalogPinForVPS WPP 24 WscR WSCR Analog Pin For VPS WPP avos AVDD3 EV Analog VDD For PLL 26 780 TET k 27 Analog Pin for display pixel 28 Analog pin for VPS WSS_ 30 3 AVDD AVDD Analog Powersupply 32 Test Pin L e em it 36 GND GND Digital Ground 37 o JTRSTO 3s Pxm Analog Pin for display pixel Analo
5. O SERVICE MANUAL ww Quadro Brown goods TV SETS 14 21 STV2248 chasis MODELS CTV 55A15 TXT CTV 55AF15 TXT CTV 37A15 TXT DADA 71 5 RESISTANCE VALUES INO1 4W UNLESS OTHERWISE SPECIFIED 1 T 2 CAPACITANCE VALUES IN uFSOV LESS THAN 1 AND s SCH21ST9JL R7 yz 10 IN PSO IF NORE THAN 1 UNLESS OTHERWISE SPECIFIED O a GCI ARE SUBECT TONE WHOUTAOTCEFOR E gt e hu eo AZ ra DED E Hes var i Ej eo w J l IJ 448 408 TW 217 ere ze c11 0101 aus Ew 10001 Smetes BCLISAF NTALUBTUN AGCSIECAP AGCPIECAP AMIMOUT INTCVBSOUT 34
6. Sip 08 h es 4 0x2d AudoPP CYANke Analog 0x33 Audio adjust Sub brightness YELLOW key Recall 0x2a Status recall Menu 0x2b Menu switch Auto center Run time VCO mode choice Oxlc Channel Menu item up Item up Page plus Sr down 0x24 Volume Increase value Value 0x25 Volume Decrease value Value 0x29 Sourse changed Channel delete Auto adjust VCO e eh en _ NICAM NICAM 0x2c menu Menu ii RED enter Ta 3 Enerxt M C Em eee Pe See Mi Cancel OxOb Cancel Sus Reveal 0x00 Reveal Subcode 0x04 Subode 5 1 3 Non Volatile Memory The CTV5 tuning and sound system requires 1 KBytes non volatile memory 24C08 With such a memory the system is able to stores tuning information and label of the 99 preselected programs along with the last picture sound control settings Service and Alarm Settings The following is EEPROM Address map defined in EEPROM h Signature Byte address 0 amp 1023 Value 0xDC Service Signature Byte address 1 amp 1022 Value of service in 0x66 Value of service out 0x99 Power related byte address 3 EEPROM_TV_OPTIONS EEPROM STANDARD SELECTION EEPROM PP S PP EEPROM LAST CHANNEL EEPROM LANGUAGE EEPROM POWER STATUS START VIDEO Byte address 10 EEP
7. Adjust VPOS_OSD Adjust HPOS OSD Teletext Adjust VPOS OSD Teletext 3 BASIC HARDWARE DESCRIPTION 3 1 Basic Hardware Specification The CTV5 system has following components ST92195 MCU OSD TXT controller with CTV5 software inside 24C08 1K byte Non Volatile memory EEPROM STV2238 46 48 Controlled Multi standard TV Processor STV8203A Bus controlled Multistandard TV Sound Demodulator TDA7439 7449 Bus controlled Audio processer STV9306 Bus Controlled Vertical deflection system with E W correction output circuit M3004LAB Remote Controlled Transmitter Voltage Synthesis Tuner Communication between microcontroller master and all bus controlled devices slaves is done using a two wire bidirectional C bus 3 2 Microcontroller ST92195 Microcontroller OSD Teletext decoder VPS PDC WSS decoder are embedded in one chip For the details of microcontroller please refer to the ST92195 data sheet 3 3 Non Volatile Memory 24C08 The 24C08 is a 8K bit 5V electrically erasable programmable read only memory EEPROM organised as four pages of each 256 by 8 bits Data and instructions are transferred via the I2C bus Minimum programming time is 10 ms Data retention is at least 10 years independent of the power on off status The number of erase write cycles per address is greater than 10 for 24 08 3 4 Multi Standard TV Processor STV223X 4X STV223X 4X is a fully bus controlled IC for TV including PIF
8. In RF mode the PLLI time constant is set as Auto and in other modes AV1 AV2 SVHS RGB it is set as short time constant 6 1 10 Standby Pressing the standby key switch will put the set in Standby mode if it is ON If the Set is in Standby Pressing Standby key P P Key or any digit key will put the set in ON condition The last power status is stored in the EEPROM If the set was in standby before mains switch was put OFF by again turning ON the mains switch the set will go to standby If the set was in ON condition before main switch was put OFF by turning ON the mains switch the set will go in ON condition with the most recent program Sound and picture settings recalled from EEPROM 6 1 11 Sleep Timer The set will switch OFF if the sleep timer expires The Sleep timer can be set in steps of 10 minutes with a maximum of 120 minutes 6 1 12 Auto ShutOff Timer When no Front end IDENT from RF is detected for 5 minutes the set will switch to standby automatically 6 1 13 NICAM Status change and display If not in Teletext mode pressing the 1 11 key on remote displays the Nicam Zweiton Mono Standard on third line BG DK LL1 and stereo mode in the next line Duall Dual2 If the mono displayed in Red color that means the Nicam Zweiton is available and the user have force the sound to mono mode However if the mono in Green color maybe the Nicam Zweiton is not available now
9. TABLE address 74 LOGO data start address 80 or 0x50 Lenght should lt MAX LOGO LENGTH 12 ASCII char LOGO characters ASCII char Tuning Data Offset 96 Total 99 3 Bytes bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 1 bit 0 O Band Band Tuning Value bit 13 8 _ Only for the SUPER TUNER is used Label Data Total 99 SB tes 2 Fine Tune data Total 99 1 Bytes bit7 bit X Fine tune bits 6 data Total 99 B Bytes Mone X L X X X 5 2 Tuning This section describes the tuning algorithm the corresponding OSD is described in the user interface section 5 2 1 Automatic tuning based on Voltage Synthesis Principle CTV5 provides an automatic tuning system in 3 different tuning bands The search tuning function requires a IDENT signal and AFC window status which is read via I2C from STV223X 4X AFC status could be in one out of the following 5 states F pll Fo lt 300 Khz 300KHz lt F pll Fo lt 60 KHz 60 KHz lt F pll Fo lt 60 KHz 60 KHz lt F pll Fo lt 300 Khz 300 KHz lt F pll Fo If the search is activated while the TV is tuned to a station IDENT available CTV5 will first try to escape from it The tuning voltage will be increased until ident fails After this the search for the new transmitter can start The tuning voltage is increased till the transmitt
10. the setting of the b1 and b2 is describing as below 1 If b1 b2 0 then the TEXT languages like ENGLISH FRENCH SWEDISH CZECH GERMAN PORTUGUESE SPANISH ITALIAN RUMANIAN can be decoded 2 If b1 1 02 0 then the TEXT languages like ENGLISH RUSSIAN SWEDISH TURKISH GERMAN PORTUGUESE SPANISH ITALIAN RUMANIAN can be decoded 3 If b1 0 b2 1 then the TEXT languages like POLISH RUSSIAN SWEDISH CZECH GERMAN SERBIAN ITALIAN RUMANIAN can be decoded 4 f b1 b2 1 then the TEXT languages like POLISH RUSSIAN SWEDISH CZECH GERMAN PORTUGUESE SPANISH LETTISH RUMANIAN can be decoded OPTIONG ST TEXT only for ST engineer b0 enable ST to change the process for adjusting Auto gain B1 b2 b3 select the correct process ROM 6 P valid OSDEPROM M6 R valid ROM M6 R valid EPROM M6 R valid EPROM M6 R valid ROMLESS H P valid ROM H5 P valid EPROM M6 A valid note ROMLESS valid ROM 6 valid APPENDIX A IR REMOTE CONTROL The M3004LABI transmitter IC is designed for infrared remote control systems The data format for the remote output is as follows 50 6 Command Bits The pattern is pulse distance coded These pulses are modulated Modulated pulses allow receivers with narrow band preamplifiers for improved noise rejection In the modulated transmission the first bit is a constant reference time bit This is used as a reference time for the decoding sequence Thi
11. will effective even if the TV set have been shutdown When OK key is pressed from item STORE another submenu appears with 2 items namely Program Program number to which you want to store the tuning info and Store If item Program is selected activation of V V keys will decrease increase the program number entry It can also be done by direct digit keys Key 0 to 9 on remote handset When item STORE is selected and OK key is pressed the existing tuning information along with AUTO colour standard and sound standard based on sound carrier strength level will be stored in the Program number entered in item PROGRAM and OK display will appear beside item STORE 6 2 5 SETUP MENU The Timer submenu has following items 2 2 b OffTimer d On Timer Pr _ Sub menu is accessed by using OK key For items a to the key is used to change the hour 0 to 23 and V Key to change minutes 0 to 59 For item 4 V key is used to decrement On Timer Program number V key is used to increment On Timer Program number 0 to 99 The On Off Timer and Program number will be disabled when the TV set is Power on However these setting will keep on when TV in Standby mode P P keys in the organize menu are used to jump from one column to other In the column Label you can access the entries of label character by pressing V V key
12. 9 can be directly accessed through keys 0 to 9 on remote but for programs 10 99 it can be accessed by pressing key first Say if you want to access program 23 press key to see on the screen then press 2 and within 3 seconds of pressing 2 press key 3 If key 3 is not pressed within 3 seconds the program accessed is program number 2 Digit entry is not possible in AV mode 6 1 2 Program key The P P keys can be used to select 1 99 unskipped programs The program which is skipped can t be accesed through program UP DOWN keys 6 1 3 The status and time display When STATUS key is pressed for the first time the source status along with time appears on screen for 5 seconds If the Nicam is detected the OSD will be as following When STATUS key is pressed for the second time the time will always dispalyed as following When STATUS key is pressed for the third time all the OSD will hide 6 1 4 Image ambiance Key PICTURE_PP The TV picture can be adapted to suit the current lighting conditions Press Successively to select the desired settings Soft Dynamic Favourite Standard STANDARD SOFT and DYNAMIC are preset values of Brightness Contrast and Colour whereas FAVOURITE is the last analog setting that the user had set 6 1 5 Sound ambiance Key SOUND The TV picture can be adapted to suit the current conditions Press Successively to select the desired settings Music News Favourit
13. C Blue 0 127 g APR threshold 0 15 h LOGO the first show the length of logo and the followed is the logo 1 R Cutoff 0 63 j G Cutoff 0 63 The display of Service 1 menu is as follows 6 3 2 SERVICE MISC ADJUSTMENT When in Service 1 menu if OK key is pressed Service 2 menu appears and the display is as follows The parameters controlled in the Service 2 menu are a Tuner AGC 0 63 b Horizontal position 50 Hz 0 63 c Vertical position 50 Hz 0 15 d Vertical amplitude 50Hz 0 63 e Vertical linearity 50Hz 0 63 f Horizontal position 60 Hz 0 63 g Vertical position 60 Hz 0 15 h Vertical amplitude 60 Hz 0 63 i Vertical linearity 60 Hz 0 63 j Sub Bright Maximum 0 63 k Sub Bright Minimum 0 63 1 Sub Tint 0 63 VCO Coarse 0 15 VCO Fine 0 127 VCO Coarse L1 0 15 VCO Fine L1 0 127 The display of Service 2 menu is as follows STATUS The VCO status bar at the bottom of the screen appears only if either VCO Coarse item or VCO Fine item is selected The VCO status is read from the Read register of STV223X 4X and guides whether to Increase Decrease the VCO registers to attain VCO OK Status For doing VCO adjustment Feed a 38 9MHZ Carrier as IF input and adjust VCO Coarse and fine parameters to get VCO OK Status If the cursor is in VCO Coarse or Fine and the display shows VCO OK status then pre
14. ROM BRIGHTNESS EEPROM_ CONTRAST EEPROM COLOR EEPROM SHARPNESS EEPROM_ TINT EEPROM VOLUME EEPROM BALANCE EEPROM BASS EEPROM TREBLE Service RGB Byte address 19 EEPROM RED GAIN EEPROM GREEN GAIN EEPROM BLUE GAIN EEPROM DC RED EEPROM DC GREEN EEPROM DC BLUE EEPROM APR THRESHOLD EEPROM RED CUT OFF EEPROM GREEN CUT OFF Service Byte address 28 EEPROM_ AGC EEPROM HORIZONTAL SHIFT VERTICAL POSITION EEPROM VERTICAL POSITION 60 EEPROM VERTICAL AMPLITUDE EEPROM VERTICAL AMPLITUDE 60 EEPROM BRIGHT MAX EEPROM BRIGHT MIN EEPROM SUB TINT EEPROM PLLI EEPROM PLLO EEPROM PLLI 11 EEPROM PLLO LI Design Byte address 41 EEPROM AGC GAIN ADJUST EEPROM MISCI EEPROM MISC2 EEPROM MISC3 EEPROM 4 EEPROM 5 EEPROM MISC6 EEPROM HPOS OSD EEPROM VPOS OSD 16 EEPROM HPOS OSD TELETEXT EEPROM VPOS OSD TELETEXT Service STV9306 Byte address 52 EEPROM V SAW50 EEPROM V SAW60 EEPROM V SH50 EEPROM V SH60 EEPROM V SC EEPROM V CC EEPROM EW VDC EEPROM EW AMP EEPROM EW SHAPE EEPROM EW TRAP 5 BRIGHTNESS address 62 EEPROM S COLOR address 63 EEPROM S CONTRAST address 64 Alarm Byte address 65 EEPROM ALARM SET EEPROM ALARM CHANNEL EEPROM ALARM ON HOUR EEPROM ALARM ON MINUTE EEPROM ALARM OFF HOUR EEPROM ALARM OFF MINUTE Child Lock Byte address 71 EEPROM CHILDKEY CODEI EEPROM CHILDKEY CODE2 EEPROM CHILDKEY CODE3 EEPROM RUN TIME CHOICE
15. SIF Luminance Chrominance and deflection processing It is a bus controlled PAL SECAM NTSC single chip TV Processor For details of STV223X 4X features please refer to the STV223X 4X datasheet 3 5 Multi Standard Sound Demodulator STV8203A The STV8203A provides all the necessary circuitry for demodulation of all Nicam and German Stereo audio transmission For details of STV8203A features please refer to the STV8203A datasheet 3 6 Sound Processor TDA7439 TDA7449 TDA7439 7449 is a volume tone bass and treble balance Left Right processor for quality audio TDA7449 provide 2 stereo inputs while TDA74439 provide 4 inputs For details of TDA7439 7449 features please refer to the TDA7439 7449 datasheet 3 7 E W Correction processor STV9306 The STV9306 is a fully bus controlled IC for vertical deflection and designed for use in 110 4 3 or 16 9 CRT application It integrates both vertical deflection and E W correction circuit necessary for design of 110 chassis 3 7 Remote Control Transmitter M3004LAB1 See Appendix A For details see M3004LABI datasheet IRIN 1 56 KB INPUT RESET 2 55 NC 3 54 VSOUT MUIE 4 53 LED NC 5 52 LET ONOFF 6 51 DESIGN 7 50 SCART1 8 4 VOLPWM SCART2 9 48 Vin PAM AVSEL 10 47 NC so f 46 SAWSW2 s 12 2 45 NC Nc 13 N 4 SANSM NC 44 2 43 BW 15 o 42 G 16 41 VSYNC R 17 40 HSYNC FB 18 39 AVDDI SDA 19 38 PXAM sa
16. Z SPACE 0 to 9 Picture AUTO PAL SECAM NTSCI NTSC2 RF Std BG DK I LL MN for Europe Skip Yes No Function Blue back Yes No Children Lock Yes no Language English French German Italian Spanish Portuguese Greek Dutch Danish Swedish Finnish Norwegian 2 5 SOUND Volume control in 64 steps Stereo Sound Multistandard Nicam and Zweiton demodulation Automatic mute during program change Fully suitable for FE sound output on AVI connector 2 6 PERI TV AV has FE audio video input Output RGB inputs Full SCART Auto SCART level detection 2 7 MEMORY Storage of last Sound and Picture settings Storage of last Channel Power status Storage of Tuning information of the 99 programs Storage of Label of 99 programs Each of 4 characters Storage of Service settings Storage of Alarm settings Storage of Nicam Zweiton standard of 99 programs Storage of Child Lock value Storage of Customer character LOGO 2 8 POWER If the TV is in ON state before the mains switch is made OFF at power on reset via mains switch TV goes in to POWER ON mode If the Set is in Standby before the mains switch is made OFF at power on reset via mains switch the TV goes in to Standby mode The program provides a fixed delay of 1 second and screen blanking of about 500 msec to allow SMPS to stabilise After power on reset of microcontroller and first time swit
17. ching of the set the system tunes to program 1 and recalls analog picture and sound controls from the EEPROM If the set is in standby the TV set comes out of standby using Digit keys P and P keys 2 9 Standby Sleep timer selection of in steps of 10 minutes till a maximum of 120 minutes Automatic switching to standby mode when there is no valid signal for 5 minutes 2 10 Adjustments Initialize EEPROM ROM default values programmed into EEPROM Through Service menu 1 the following parameters could be adjusted Adjust Red Gain Adjust Green Gain Adjust Blue Gain Adjust DC Red Adjust DC Green Adjust DC Blue Adjust APR threshold Input the customer character LOGO Adjust Red cutoff Adjust Green cutoff Through Service menu 2 the following parameters can be adjusted Adjust Tuner AGC Adjust H position Adjust V position Adjust V amplitude Adjust Sub_tint Adjust Sub_ brightness VCO Coarse VCO Fine VCO Coarse L VCO fine L Through Service menu 3 STV9306 if there is no STV9306 then this menu is not displayed Adjust V Amplitude 50Hz 60Hz Adjust V Position Adjust C Correction Adjust S Correction Adjust H Amplitude Adjust EW Amplitude Adjust EW Trap Adjust EW Shape Through Service menu 4 Design menu following parameters are adjusted Adjust Tuner AGC gain Adjust Option Adjust Option2 Adjust Option3 Adjust Option4 Adjust Option5 Adjust Sttext Adjust HPOS_OSD
18. e Standard STANDARD SOFT and DYNAMIC are preset values of BASS TREBLE and BALANCE whereas FAVOURITE is the last analog setting that the user had set 6 1 6MUTE Sound can be switched OFF immediately with MUTE command A second reception of this command returns the sound to previous level Sound mute is cancelled by a Volume command When MUTE is activated the display appears as follows 6 1 7 Volume Control Volume can be controlled using V V keys The Volume string and bar are displayed at the bottom of the screen 24 6 1 8 ANALOG SETTING Press key ANALOG you will have the right to choose the picture and sound settings as follow VOLUME BRIGHT CONTRAST gt COLOR SSHARPNESSTINT NTSC gt BASS gt TREBLE gt BALANCE Color 24 6 1 9 AV1 AV2 SVHS RGB Selection The AV1 input AV2 input SVHS and RGB mode External inputs can be selected by pressing the AV key All those modes can be enabled or disabled in the servise mode one by one You can individually define whether or not to include AV1 AV2 SVHS and RGB mode If all these inputs are defined then by successively pressing AV key the source changes in the following sequence AVI AV2 SVHS Mode RGB Mode RF In case SVHS is not defined then the sequence will be as follows AVI AV2 RGB Mode RF In case of the AV2 disabled the AVI will displaying when it is selected Inside the menu AV command is not functional
19. er is found When the tuning reaches the top of the band it will change to the next higher band The band is tuned in the following order VHF L VHF H UHF During the search CTV5 continuosly scans its IDENT and AFC status read via I2C bus Good performance hence relies completely on the behaviour of these two signals 5 2 2 Automatic Following Once the system is tuned via automatic tuning the signal will stay locked by means of automatic following Using digital AFC This transmitter following will continue as long as the transmitter identification signal stays present Once fine tune is activated the automatic following is disabled If Compilation option of FINE TUNE STATUS is selected the AFC status is stored with the individual program If the fine tune value of a particular program is not zero the AFC following for that program is disabled 5 3 Sound System Presently the mono sound is received from STV223X AX This is fed as Mono I P to STV8203A In case the Nicam or Zweiton signal is not detected it switches to Mono input If in auto tuning France is selected AM sound system will be selected Also in Organize menu if RF std is selected as LL AM sound system will be selected By pressing NICAM key on remote in normal mode it is possible to change the language if the standard is NICAM DUAL or Zweiton DUAL 6 USER INTERFACE 6 1 Direct Controlled Functions 6 1 1 Digit Entry Programs to 9
20. g Power Supply Pe BSWI BandSwitchl pa BW Site 2 4 2 SAWSWI O SAWFiterSwichI 46 SAWSW2 SAWFilerSwich2 4s 46 ViPWM O Vdimarty PWM OUTPUT e VOLPWM O VOLPWMOUTPUT 50 xa xa 1 Clock Oscillator 52 225 2 LED LEDDRIVE 3 Ra VST Voltage Oupat 4 1 RESET Reset is active low Input The ST9 is initialized by the Reset Signal With the deactivation of RESET program execution begins from program memory locations 00h and Olh 4 2 R G B BLANK Red Green Blue Fast Blanking On Screen Display DAC outputs 4 3 XTAL These pins connect a parallel resonant crystal of 4 MHz 4 4 BAND SWITCHING OUTPUTS BSW1 BSW2 SELECTED BAND 0 NR C Z eee Ep 4 5 AV STATUS 4 5 1 SCART 1 SCART 2 pin 8 amp pin 9 SCART SW pin of the microcontroller monitors the status of the AV SCART Connector When the signal at this pin goes from low to high the set will automatically switch to AV and when it goes from high to low the set will automatically switch to the previous source 4 5 2 AV SELECTION pin 10 10 pin status 0 1 AV MODE AV1 RGB S VHS 4 5 3 AV SELECTION 11 pin 12 pin 850 11 pin 0 1 0 1 51 12 pin 0 0 1 1 TV
21. is accessed using P P keys the setting changed bu using V V keys If the child lock is changed from No to Yes the lock menu will appear In this mode three digit can be key in and saved as the locking number When the next time the TV is power on the user must key in the locked numbers for enter the TV And it s convenience for user to use the PP key three times when they forget the lock number If compilation option LANGUAGE is selected then Language menu appears on menu The Language menu has twelve items as following a English b French c German d Italian e Polish f Spanish g Portuguese h Czech i Swedish When one of the languages is accessed by using P P keys the language is instantaneously updated 6 3 Service controlled Function The Service 1 mode is entered by pressing the SERVICE key when the TV is in ON condition and not in any Menu mode In service mode by pressing key Service 2 is accessed by pressing key again Serivice 3 is accessed By pressing PP key we come out of Service mode 6 3 1 SERVICE RGB ADJUSTMENT The items within the Service 1 mode be accessed using P P keys and the selected item can be modified by using V V keys The parameters controlled in the Service 1 menu are a Red Gain 0 63 b DC Red 0 127 c Green Gain 0 63 d DC Green 0 127 e Blue Gain 0 63 f D
22. n b2 Super tuner 0 OFF 1 Sound Demod 0 Intercarrier MONO 1 QSS NICAM b0 logo display 0 off 1 on OPTION2 set to 0 by default b5 HALF_CONTRAST 0 OFF 1 ON b4 Color 6dB 0 OFF 1 ON b3 APR Feature 0 1 OFF b2 Black Strech 0 1 OFF b1 Auto Flesh 0 ON 1 OFF b0 Coring 0 ON 1 OFF OPTION3 b5 AVL 0 OFF 1 ON b4 PIF overmodulation 0 OFF 1 ON b3 Market France secam LL 0 OFF 1 b2 Manual Auto cutoff 0 1 b1 Mute pin low high to contol the speaker 0 1 b0 TDA7449 TDA7439 0 1 OPTION4 b4 SCART2 0 OFF 1 ON b3 RGB 0 OFF 1 ON b2 SVHS 0 OFF 1 b1 AV2 0 OFF 1 ON b0 AVI 0 OFF 1 OPTIONS There are 8 bits used in OPTION 5 They 50 b1 b2 b3 b4 b5 b6 and b7 For b0 normally ST suggests to set it to 0 For b1 b2 they are used to select teletext languages For b3 it s used to enable AV3 and SVHS When b3 is set to 0 SVHS is enabled When b3 is set to 1 in binary the value is 8 in decimal AV3 is enabled b4 b5 b6 and b7 are used to set the brightness of background in teletext mode When b4 b5 b6 b7 are all set to 0 the brightness of teletext background is set to minimum level When b4 b5 b6 and b7 are all set to 1 the brightness of teletext background is set to maximum level For CPU with 9 languages ST92195C7B1 MBF
23. ng 4 items a Auto Tune b Manual Tune c Fine Tune d Store These items are accessed using P P key If Secam_LL is enabled If MARKET FRANCE is selected in option3 bit 4 then by pressing OK key on Autotune will make another sub menu appears to select between Worldwide France amp Both If Worldwide is selected and OK key is pressed then PIF modulation bit in STV223X 4X is selected as negative and sound demodulation bit is selected as FM If France is selected and OK key is pressed then PIF modulation bit in STV223X 4X is selected as Positive and sound demodulation is selected as AM For band I L bit in STV223X 4X is set as 1 and VCO Coarse L and VCO Fine L values stored in the EEPROM during Service menu will be loaded in the corresponding STV223X 4X registers If Both is selected and OK key is pressed then it will scan all 3 bands with worldwide selected followed by scanning the 3 bands with France selected This function is mainly used for regions closed to France where you have SECAM LL and other standards are broardcasted If OK is pressed once more and the auto search process will start If Secam_LL is disabled If MARKET FRANCE is not selected in option3 bit 4 then by pressing OK key on Autotune will start the auto search process w Auto Tune will automatically search through all the bands for any available stations in transmission and
24. o Multiplex 1 2 References ST92195 Datasheets STV223X 4X Datasheet STV8203A Datasheet TDA7439 7449 Datasheet STV9306 Datasheet 2 SPECIFICATION SUMMARY 2 1 Hardware The microcontroller has 24 32 48 64K ROM 256 bytes RAM 0 256 512 bytes Aux RAM bit level on chip 0 1 7 page teletext OSD 2 2 Tuning Voltage synthesis tuning system via 14 bits PWM DAC Automatic search tuning based on AFC and IDENT Tuning VST system in 3 bands VHF L VHF H UHF Fine up and down tuning Auto Program function to find and store all transmitters Automatic PAL SECAM NTSC recognition Suitable for negative and positive modulation Programme Up Down keys to select 99 programmes Silent tuning 2 3 Control 8 Local Keys P P V Menu OK TV AV Service Max 32 Remote Keys 2 4 OSD On Screen Display MENU CONTROL Picture Menu Brightness 64 Steps Contrast 64 Steps Colour 64 Steps Sharpness 16 Steps Tint 64 Steps Only for NTSC Sound Menu Bass 64 Steps Treble 64 Steps Balance 16 Steps Volume 64 Steps Install Menu Auto Tune Manual Tune Fine Tune 64 Steps from centre frequency Store Setup Menu The Setup Menu contains 4 submenus Timer Time Hour 0 23 Minute 0 59 On Timer Hour 0 23 Minute 0 59 Off Timer Hour 0 23 Minute 0 59 On Timer Pr 1 99 Organize Program 1 99 Label 4 digit with each program A to
25. rolled Function 6 3Service Controlled Function Appendix A IR Commands 1 INTRODUCTION CTVS is a Voltage Synthesis Tuning and control system for multi standard TV receivers with on screen display OSD for all relevent control functions The system is based on I2C bus controlled video processing IC STV223X 4X which also controls mono sound The Nicam and Zweiton demodulation is done using IC STV8203 It is also possible to do picture geometry correction using IC STV9306 The user interface is menu based control system with P P V V MENU OK and keys on Remote local keyboard Hence any menu related function could be accessed using these six keys Teletext is done by the microcontroller on chip teletext module 1 1 Definitions acronyms and abbreviations ADC AFC AV DAC IDENT FE LS MS NV memory OSD PP VST Video proc PIF SIF NICAM Analogue to Digital Converter Automatic Frequency Control Audio Video peripheral TV signal source Digital to Analogue Converter Inter IC bus 2 wire bidirectional multi master bus Horizontal coincidence signal transmitter IDENTification Front End Loud Speaker Multi Standard Non Volatile memory On Screen Display Personal Preference Voltage Synthesis Tuning STV2238 integrated bus controlled PAL SECAM NTSC TV processor Picture Intermediate Frequency Sound Intermediate Frequency Near Instantaneous Companded Audi
26. s is followed by a toggle bit The toggle bits function is to indicate to the decoder that next instruction is to be considered as a new command The next 3 bits for the Sub system address These bits have been hardwired as 101 for 5 The last 6 bits are command bits the codes of which for different commands are listed in Section 4 7 5792195 Crystal frequency of controller 4 MHz IR Receiver type 5380 IR Transmitter type M3004LABI Crystal Frequency of IR Transmitter 455 KHz For crystal of 455 KHz t osc 2 2 us Modulation period Tm 12 t osc 26 4 us Basic unit of pulse distance To 1152 t osc 2 534 ms Word distance 55296 t osc 121 65 ms Logic 0 2To Sms approx Logic 1 3To 7 5 ms Toggle bit Sms or 7 5 ms Reference bit 7 5 ms
27. spa B ve A ai A s b E bi z P Ww m coe E ELS morer apum s cork t pm 102 nins V SYNG p kas F AM sx IT m E T bei gt m i SYNC RL207 pen 1305 EKM la Ja ZR 062 HSYNC BCS27 0101F T Tow 9 ms x 12x05 TE 0609 x i Ra LES gt x s CE E m 1S 250VA0 108K 7 2 A E Es d K xuti 1 ac DL Pt 5 yon 48 E E 5 YDDUUI0S C603 220 1 KV TABLE OF CONTENTS S N TOPIC 1 NTRODUCTO INTRODUCTION 1 1Definitions Acronyms and abbreviations 1 2References 2 SPECIFICATION SUMMARY 2 1Hardware 2 2 Tuning 2 40SD On Screen Display 3 3 8 REMOTE CONTROL TRANSMITTER M3004LABI 4 ST92195 PIN DESCRIPTION 4 1 RESET 4 2 G BBLANK 3 7 W CORRECTION PROCESSOR STV9306 4 3 XTAL 4 4 BAND SWITCHING OUTPUT 4 9 SAW SWITCHING 5 _ 6 1 Direct Controlled Function 62Menu Cont
28. ssing of TV AV key will automatically put VCO fine to the Centre of the 60 to 60 KHz window For doing VCO LI adjustment Feed a 33 9 MHZ carrier as IF input and adjust VCO Coarse L1 and VCO Fine LI to get VCO OK Status If the cursor is in VCO Coarse LI or Fine L1 and the display shows VCO OK status then pressing of TV A V key will automatically put VCO fine for L1 to the Centre of the 60 to 60 KHz window Another fast way of adjustment of VCO is to put the selection bar to either VCO Coarse or fine and press the TV AV key The VCO adjustment is done automatically Similarly if you put the selection bar to VCO Coarse LI or Fine LI and press the TV AV key the VCO LI adjustment will be done automatically 6 3 3 SERVICE STV9306 ADJUSTMENT When in Service 2 menu if Enter key is pressed Service 3 menu appears and the display is as follows if the IC STV9306 have not been detected then Service 4 design menu menu will appears 1 Vertical amplitude for 50Hz signal 2 Vertical amplitude for 60Hz signal 3 Vertical shift internal separated by 50Hz and 60Hz 4 S Correction 5 C Correction 6 Horizontal width adjustment 7 Pincushion Correction 8 E W Sharp Correction 9 Trapezium Correction 6 3 4 SERVICE DESIGN OPTION SETTINF Design mode OPTIONI b5 P N S crystals application 0 2 crystals 1 1 crystals b4 Cutoff Loop 0 OFF 1 ON b3 Safety Reset O active 1 no
29. store them consecutively into program numbers 01 onwards w Progression of operation will be indicated by moving of bar display changing of band and program number The Auto Tune can be aborted using MENU or POWER Key w Whenever a program is stored the Colour system is put as AUTO For sound system the Carrier levels 4 5 5 5 6 0 6 5 MHz are compared and the one with the highest level is tagged with the program Also the label is reset back to If Secam_LL is enabled If Manual Tune is selected and OK key is pressed another sub menu appears to select between Worldwide and France same as Auto tune but without item Both Now by pressing V V key Manual tuning will start and display as following on screen If Secam_LL is disabled Now by pressing V V key Manual tuning will start and display as following on screen w If V key was pressed in Manual Tune it will search for next available station and Stop where the signal is received If V key is pressed it searches in the negative direction and will search for the previous channel w During Manual Tune only MENU and POWER key is recognised rest of the keys are ignored If fine tune is selected activation of V V key will tune forward backward The bar graph will show the deviation in positive or negative direction with repect to the Stored tuning information If user store the fine tune value by using the STORE function then the value
30. when the voltage level is low at pin 7 of MCU 5 FUNCTIONAL DESCRIPTION This section describes all functions and hardware requirement of CTV5 Overall control of the system is done by the microcontroller which Decodes the data from the Remote controller Decides on which local key is pressed Controls the On Screen Display Exchanges information via I2C bus Selects the proper tuner band and generates the 14 bit data for the internal Voltage synthesised tuning DAC Selects proper IF and Sound demodulator Selects proper Nicam Zweiton decoder demodulator Controls analog picture settings and picture geometry Switches between internal and external audio and video signals 5 1 Interface Description 5 1 1 Remote Control Handset A remote control handset compatible with 5 be designed using M3004LABI 5 1 2 Remote control decoding The infra red remote control pulses are modulated at a frequency of 38 Khz The remote control signal active high from the IR receiver is fed to the external interrrupt input IR INPUT pin 1 of the microcontroller The following table lists all remote commands to which standard remote control responds to 220 0 50 0 Ose gt e c x12 2 2 2 L i 4 0 4 4 0x15 0x16 D lel 1 sr Tas Lem Review 0x28 Channel review Reveal Power on off Power on off Power on off Power on off
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