User manual PIONEER VSX-4900S

[. . . ] SOUND OUTPUT STAGE TDA7269A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6. VERTICAL OUTPUT STAGE WITH STV9306. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 7. VIDEO OUTPUT AMPLIFIER STV5112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8. POWER SUPPLY (SMPS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 9. [. . . ] 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 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). · A vertical countdown system to generate all vertical windows (vertical synchronization window, frame blanking pulses, 50/60Hz identification window. . . ). · 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). 2. 6 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 only protections required at the cathode outputs are a flash resistor and a spark gap. Furthermore, the device has a high voltage power supply (VDD) and a low voltage one (VCC). POWER SUPPLY (SMPS) The DC voltages required at various parts of the chassis are provided by an SMPS transformer controlled by the IC MC44608 which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer produces 150V for FBT input, ±12V for audio output IC, +5V and +8V for ST92195. POWER FACTOR CORRECTION Passive components are used for the solution of power factor correction. 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 I²C standard, two wire serial interface which uses a bi-directional data bus and serial clock. CLASS AB STEREO HEADPHONE DRIVER TDA1308 The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package. CLASS AB MONO SUBWOOFER DRIVER TDA7261 The TDA7261 is a class AB dual Audio power amplifier, specially designed for high quality sound applications in mono TV chassis. SAW FILTERS Saw filter type: G1975M: K2966M: J1981 : K2958M: K2962M: L9653M: G3967M: G9353M: K3958M: K9356M: K9656M: K3958M: K9356M: M1962M: M3953M: M9370M: Model: PAL B/G MONO PAL SECAM B/G/D/K/I MONO PAL-I MONO PAL-SECAM B/G-D/K (38) MONO PAL-SECAM B/G/D/K/I/L/L'MONO SECAM L/L'AM MONO (AUDIO IF) PAL-SECAM B/G STEREO (VIDEO IF) PAL-SECAM B/G STEREO (AUDIO IF) PAL-SECAM B/G/D/K/I/L/L'STEREO (VIDEO IF) PAL-SECAM B/G/D/K/I STEREO (AUDIO IF) PAL-SECAM B/G/D/K/I/L/L'STEREO (AUDIO IF) PAL I NICAM (VIDEO IF) PAL I NICAM (AUDIO IF) PAL M/N NTSC M MONO PAL M/N NTSC M STEREO (VIDEO IF) PAL M/N NTSC M STEREO (AUDIO IF) IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM · ST92195 · STV224X · TUNER (UV1315, UV1316, UV1336) · TDA7269A · STV9306 · STV5112 · MC44608 · MSP 34XXG · 24C08 · TDA1308 · SAW FILTERS G1975M, K2966M, K2962M, L9653M, G3962M, G9353M, K3958M, K9356M, K9656M, K6263K, K9652M, M1962M, M3953M, M9370M 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. [. . . ] Max:16V (Operating range 6. 6V-13V) Min:50V Max:500V MSP 34XXG General description: The MSP 34xxG family of single-chip Multi-standard Sound Processors covers the sound processing of all analog TV standards worldwide, as well as the NICAM digital sound standards. The full TV sound processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on a single chip. Two-carrier FM systems according to the German or Korean terrestrial specs or the satellite specs can be processed with the MSP 34x0G. Digital demodulation and decoding of NICAM-coded TV stereo sound, is done only by the MSP 3410G. [. . . ]