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7. VIDEO OUTPUT AMPLIFIER STV5112 8. POWER SUPPLY (SMPS) 9. POWER FACTOR CORRECTION 10. SERIAL ACCESS CMOS 8K EEPROM 24C08 11. CLASS AB STEREO HEADPHONE DRIVER TDA1308 12. CLASS AB MONO SUBWOOFER DRIVER TDA7261 13. SAW FILTERS IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM...
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also used in tuning mode to identify the presence of a signal whilst tuning. This is used in auto tuning mode to determine the optimum frequency setting for the channel. Tuner AGC voltage from pin 8 of IC403 is taken directly to the tuner.
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Vertical Size for 50 Hz (VSIZ and VZSZ) Vertical Position for 50 Hz(VPOS) Horizontal Size for 50 Hz (HSIZ) Horizontal Position for 50 Hz (HPOS) Horizontal Trap Correction for 50 Hz (HTCO) Vertical S Correction for 50 Hz (VSCO) Vertical C Correction for 50 Hz (VCCO) Horizontal Pincushion Correction for 50 Hz (HPCO) Horizontal Corner Correction for 50 Hz (HCCO) Vertical Size Offset for 60 Hz (VSOF)
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.
1. INTRODUCTION 11AK37 is a 110° chassis capable of driving 25”, 28”, 29”, 33” 4:3 and 28”, 32” 16:9 tubes at the appropriate currents. The chassis is capable of operating in PAL, SECAM and NTSC standards and multiple transmission standards as B/G, D/K, I/I’ , and L/L´. standards. The sound system is capable of giving 12 watts RMS output into a load of 8 ohms.
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. 2.4 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 or Y/C from either SCART2 or BAV/FAV or SVHS, and the third one is used for internal video.
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.
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UV1316 (VHF/UHF) is used as a PLL tuner. For only PAL M/N, NTSC M applications UV 1336 is used as the PLL tuner. UV 1315 (VHF/UHF) is used as a VST Tuner. Channel coverage of UV1316: OFF-AIR CHANNELS CABLE CHANNELS BAND CHANNELS FREQUENCY...
4. MULTISTANDARD SOUND PROCESSOR The MSP 34xxG is designed to perform demodulation of FM or AM-Mono TV sound. Three kinds of MSP’ s are used: MSP 3400G,MSP 3410G and MSP 3411G. The MSP 3400G is fully pin and software-compatible to the MSP 3410G, but is not able to decode NICAM. It is also compatible to the MSP 3411G,sound processor IC with virtual dolby sound.
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STV224X Video processor: The STV2246/2247/2248 are fully bus controlled ICs for TV including PIF, SIF, luma, 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/NTSC) sets with very few external components and no manual adjustments.
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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, H, L, L’ , I and I’...
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Band switching table: Pin 3 Pin 4 Pin 5 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, H, L, L’ , I and I’...
IF output TDA7269A General Description of TDA7269A The TDA7269A is a class AB dual Audio power amplifier, specially designed for high quality sound applications as Hi-Fi music centers and TV sets. Requires very few external components. – Wide supply voltage range up to ±20V –...
PINNING CRAMP CHOLD SYNC FLYBACK VOPS EWOUT SENS2 EWFB SENS1 BREATHING STV5112 General Description: The STV5112 includes three video amplifiers designed with a high voltage bipolar/CMOS/DMOS technology (BCD). It drives directly the three cathodes and is protected against flashovers. Thanks to its three cathode current outputs, the STV5112 can be used with both parallel and sequential sampling applications.
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technique enables the reduction of the stand–by power consumption to approximately 1W while delivering 300mW in a 150W SMPS. • Integrated start–up current source • Loss less off–line start–up • Direct off–line operation • Fast start–up General Features • Flexibility •...
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Detection). Furthermore, pilot levels and identification signals can be evaluated internally with subsequent switching between mono/ stereo/bilingual; no I C interaction is necessary (Automatic Sound Selection). General Features • Two selectable analog inputs (TV and SAT-IF sources) • Automatic Gain Control (AGC) for analog IF input. Input range: 0.10–3 V pp •...
AK37/TITANIUM SERVICE MENU SERVICE ADJUSTMENTS Parameter Notes OSD Horizontal Position IF Coarse Adjust IF Fine Adjust IF Coarse Adjust for L-Prime IF Fine Adjust for L-Prime Automatic Gain Control VLIN Vertical Linearity VS1A Vertical Size for 50 Hz / 4:3 ( AK30 ) VS1B Vertical Size for 50 Hz / 16:9 ( AK30 ) Vertical Position for 50 Hz ( AK30 )
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NIP2 NICAM Prescaler when AVL is ON STEREO ONLY SCP2 SCART Prescaler when AVL is ON STEREO ONLY SCART1 Volume STEREO ONLY SCART2 Volume STEREO ONLY High Byte of crossover frequency for VHF1-VHF3 Meaningful for only PLL Tuner Low Byte of crossover frequency for VHF1-VHF3 Meaningful for only PLL Tuner High Byte of crossover frequency for VHF3-UHF Meaningful for only PLL Tuner...
OPTION LIST OP1 – Peripheral Options NOT USED 1, Display “ AV-3” as “ F-AV” 0, Display “ AV-3” as “ B-AV” 1, Turn back TV mode after the last AV (with AV key) 0, Turn back first AV mode after the last AV 1, SVHS is available in AV key stream 0, SVHS is NOT available in AV key stream 1, RGB is available in AV key stream...
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OP3 – Video Options Xtal Configuration 00, 1 Xtal PAL 4.43 01, 2 Xtal PAL/NTSC 4.43/3.58 10, 1 Xtal PAL/SEC/NTSC 4.43 11, 2 Xtal PAL/SEC/NTSC 4.43/3.58 1, Enable Blue back when no signal in AV modes 0, No blue back in AV modes 1, White Insertion is ON 0, White Insertion is OFF 1, Blue Background when no signal...
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OP4 – TV Features 1, Headphone is available (for STEREO models) 0, Headphone is not available 1, Arabic/Persian is Available in Menu Languages (for A, D, E, F, and later) 0, Arabic/Persian is NOT Available in Menu Languages 1, Hebrew is Available in Menu Languages (for A, D, E, F, and later) 0, Hebrew is NOT Available in Menu Languages 1, Hotel Mode can be activated 0, Hotel Mode can not be activated...
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TX1 – Teletext Options 1, Auto APS after Stand-By 0, no APS after Stand-By RESERVED (must be 0) 5 4 3 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 –...
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GEOM – Geometry Options ( for AK37 ) NOT USED 1, SVHS audio input in FAV/BAV in 0, SVHS in AV2 1, AK37 adjustment values are valid ( default for AK37 ) 0, AK30 adjustment value are valid 1, ZOOM mode is available 0, ZOOM mode is not available 1, SUBTITLE mode is available 0, SUBTITLE mode is not available...
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AK37/TITANIUM – Languages Groups GROUP 1 - WEST • ENGLISH • FRENCH • SWEDISH • CZECH • GERMAN • PORTUGUESE • ITALIAN • RUMANIAN GROUP 2 – WEST / EAST • POLISH • FRENCH • SWEDISH • CZECH • GERMAN •...
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GROUP 5 - ARABIC • ENGLISH • FRENCH • SWEDISH • TURKISH • GERMAN • HEBREW • ITALIAN • ARABIC Using Remo te Control Buttons RED : Is used to switch AVL to ON or OFF mode on service menu. GREEN : Is used to enter the geometry menu.
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