SIGNAL FLOW
The incoming TV RF signal is applied to the U/V Tuner via the Antenna and RF input. The 45.75MHz IF
signal is developed within the U/V Tuner, then amplified by an IF Preamplifier located inside the Tuner. The
amplified IF signal is sent from Pins 10 and 11 of the U/V Tuner to the SAW filter, 1003. The SAW filter
produces bandpass shaping for the IF signal before it is applied to the TV Signal Processing Integrated
Circuit, 7250 for processing. AFT voltage is developed within 7250. These voltage values are then sent to
the microcomputer via the I2C bus for Tuner Oscillator frequency correction.
Sound IF signal processing for the E8 chassis is performed by coupling the 4.5MHz Sound IF signal from
7250 Pin 6 through transistor 7266 and a 4.5MHz band pass filter 1001 to Pin 1 of 7250. In the Mono
version, Baseband Audio from Pin 15 of 7250 is buffered by transistor 7951 before being applied to Bass
and Treble circuits. The outputs of the Base and Treble circuits are applied to a 1 watt amplifier 7954 in the
US version or a 2 or 3 watt amplifier 7953 in the Latin version. In sets equipped with a Stereo module,
Baseband Audio from Pin 15 of 7250 is fed to the Stereo Decoder module. The DBX Stereo Decoder
module has internal/external switching, AVL switching, volume control, and alignment settings via the I2C
bus (SDA & SCL). Internal/external switching, AVL switching, and volume control for the Normal Stereo
module are performed through individual control lines from the Microcomputer. Audio output amplifiers for
both the DBX and Normal Stereo versions are located on the Stereo module. AVL switching for the Mono
version is performed in 7250 via the I2C bus. Volume for the Mono set is controlled in the Audio Output
Содержание 13PR19C1
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Страница 18: ...Quick Use Guide for RC0702 ...
Страница 19: ...Quick Use Guide for RCU82C ...
Страница 20: ...Quick Use Guide for RCL9UB ...
Страница 21: ...Model to Chassis to Jack Panel JP9000 Jack Panel JP9202 Jack Panel JP9403 Jack Panel ...
Страница 22: ...JP9406 Jack Panel JP9410 Jack Panel ...
Страница 30: ...Display Cabinet Back Removal Illustration ...
Страница 31: ...Display Main Chassis Removal Illustration ...
Страница 32: ...Display Service Position Illustration ...
Страница 33: ...Display 13PT30 Disassembly Illustration ...
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Страница 73: ...13E8 7584 ...
Страница 74: ...13E8 7584 ...
Страница 75: ...13E8 7584 ...
Страница 77: ...All Models 7584 POWER SUPPLY SECT A1 SCHEMATIC ...
Страница 78: ...All Models 7584 LINE DEFLECTION SECT A2 SCHEMATIC ...
Страница 79: ...All Models 7584 FRAME DEFLECTION SECT A3 SCHEMATIC ...
Страница 80: ...All Models 7584 SYNCRONIZATION SECT A4 SCHEMATIC ...
Страница 81: ...All Models 7584 TUNER VIDEO IF SECT A5 SCHEMATIC ...
Страница 82: ...All Models 7584 VIDEO PROCESSING SECT A6 SCHEMATIC ...
Страница 83: ...All Models 7584 CONTROL PROCESSOR SECT A7 SCHEMATIC ...
Страница 84: ...All Models 7584 FRONT CONTROL SECT A8 SCHEMATIC ...
Страница 85: ...All Models 7584 SMART SOUND AMPLIFIER SECT A10 SCHEMATIC ...
Страница 86: ...All Models 7584 FRONT CINCH HEADPHONE SECT A11 SCHEMATIC ...
Страница 87: ...All Models 7584 REAR I O CINCH SECT A12 SCHEMATIC ...
Страница 88: ...All Models 7584 CRT PANEL SECT B SCHEMATIC ...
Страница 93: ...USED ONLY IN MODELS 20PT30B1 21LW392221 21LW393221 7584 SIDE JACK PANEL SECT E SCHEMATIC AVJ240 ...
Страница 94: ...USED ONLY IN MODELS CH1919C125 PA9019C121 PC9219C1 7584 INTERFACE PANEL A10777 SCHEMATIC ...
Страница 95: ...USED ONLY IN MODELS 13PT30L121 7584 SIDE INTERFACE SECT E SCHEMATIC ...
Страница 96: ...USED ONLY IN MODELS HC9913C121 HC9919C1 7584 HEALTHCARE PANEL A10779 SCHEMATIC ...
Страница 97: ...USED ONLY IN MODELS 13PT30L121 7584 TOP CONTROL LED SECT F SCHEMATIC ...
Страница 98: ...All Models 7584 CHANNEL 1 CARD A10680 SCHEMATIC ...
Страница 99: ...All Models 7584 PRO VIDEO CARD A10758 SCHEMATIC ...
Страница 100: ...All Models 7584 PRO VIDEO JACK PANEL A10759 SCHEMATIC ...
Страница 101: ...All Models 7584 CLOCK SCHEMATIC ...
Страница 102: ...All Models 7584 EVENT TIMER SCHEMATIC ...
Страница 103: ...All Models 7584 MAIN CHASSIS PCB TOP VIEW ...
Страница 104: ...All Models 7584 MAIN CHASSIS PCB BOTTOM VIEW ...
Страница 109: ...USED ONLY IN MODELS 13PT30L121 7584 SIDE INTERFACE PCB TOP VIEW ...
Страница 110: ...USED ONLY IN MODELS 13PT30L121 7584 SIDE INTERFACE PCB BOTTOM VIEW ...
Страница 111: ...USED ONLY IN MODELS 13PT30L121 7584 TOP CONTROL LED PANEL PCB TOP BOTTOM VIEW ...
Страница 112: ...All Models 7584 OVERALL BLOCK DIAGRAM ...
Страница 113: ...All Models 7584 POWER SUPPLY BLOCK DIAGRAM ...
Страница 114: ...All Models 7584 POWER SUPPLY TRAINING DIAGRAM ...
Страница 115: ...MAIN CABINET EXPLODED VIEW ...