The chassis is a little center placed PCB with all part on it.
The whole board is built around the CD5151CP. Excluding passives this chip seems to have everything needed to build a TV receiver : video and audio intermediary frequency, tuner frequency control, automatic gain control, FM detector for audio, detection of synchronization pulses and horizontal and vertical deflection oscillators and drivers. There is also a TA8164P, which is a radio tuner IC. The CD5151CP already has integrated FM decoding circuitry. It may have something to do with the SECAM-L standard.CSC5151 - AN5151 TV VIF & SIF & DEFLECTION SYSTEM (FOR TV LARGE INTEGRATION)
DESCRIPTION
The UTC AN5151 is a monolithic integrated circuit containing
all stage for the VIF,SIF and deflection of television receivers.
GENERALLY, the operation of a conventional television receiver includes two main components. First, the receiver receives the incoming television signal in radio frequency (RF) and converts the incoming RF signal to an intermediate frequency (IF) signal. Then, the receiver converts the IF signal to a video baseband signal and an audio baseband signal. The baseband signals are coupled to appropriate video and audio decoders to generate the display video signals (e.g. RGB or only luminance for b/w) or sound. In general, the conventional television receiver includes a tuner for receiving the input RF signal and converting the RF signal to an IF signal by one or more frequency conversions. The frequency conversions are generally implemented as single or dual super-heterodyne conversions. In conventional television receivers, the intermediate frequency is dictated by the geographical area the receivers are to be used.
FEATURES*Hight integrated technology makes it possible the integration of
video IF circuit tuner AFC circuit sound. IF circuit and
deflection.-jungle circuit on one single chip.
*supply voltage range:8V to 12V
Also, the conventional television receiver also includes a channel filter and a demodulator for converting the IF signal to video and audio baseband signals. The channel filter is typically a discrete filter implemented as a SAW (Surface Acoustic Wave) filter see pictures. The shape of the SAW filter is designed specifically for the format (analog or digital TV) and the television standard (NTSC, PAL or SECAM) of the television signals being received. The demodulator is typically a dedicated component and designed specifically for a predetermined television signal format and a predetermined television standard. For analog television signal reception, the demodulator is a VIF/SIF module. The VIF/SIF module provides a video output called CVBS (Composite Video Baseband Signal) and audio outputs, such as MPX or A2.
FUNCTIONS
*IF Amplifier, IF AGC
*Video Amplifier, Video Detector
*Noise Canceller, Forward RF AGC
*Tuner AFT,SIF Amplifier
*Sound Detector, sync separation
*Vertical oscillation trigger and driver
*Horizontal oscillation driver and AFC
The circuit here shown is an extreme example of semplification of a b/w tv receiver in accordance of above statements.
TA8164P 3V MONAURAL RADIO IC
The TA8164P is AM/FM Tuner (FM F/E + AM/FM IF) IC, which is designed for AM/FM monaural radio. Combining with the TA7368P (Mono PW IC), a suitable monaural AM/FM radio system is able to be constituted.
FEATURES
Common output for AM/FM Switch over between AM/FM mode is possible with one- wake switch
The TA8164P is AM/FM Tuner (FM F/E + AM/FM IF) IC, which is designed for AM/FM monaural radio. Combining with the TA7368P (Mono PW IC), a suitable monaural AM/FM radio system is able to be constituted.
FEATURES
Common output for AM/FM Switch over between AM/FM mode is possible with one- wake switch
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