AUTOVOX 32 TVC2271 ALGOL YEAR 1982.

The AUTOVOX 32 TVC2271 is awooden cabinet 22 inches (56cm) color television with 32 programs and VST Search system (Motorola Memotronic).
A television tuning device having a circuit for continuously scanning at least one frequency band. Scanning can take place at two speeds and controls are provided for starting and stopping the scanning procedure. The scanning speed is automatically changed from high speed to low speed when a television channel is detected to allow ample time for scanning to be stopped manually. Alternatively, the scanning may be stopped automatically. present invention relates to a television tuning device, comprising a circuit for continuously scanning at least one band of receivable frequencies, and having control means for starting and stopping the said scanning procedure and a terminal for applying a switch signal for switching from a first band-scanning speed to a second band-scanning speed slower than the first.
The name usually applied to a unit consisting of circuits of this type for selecting and memorising a given number of preferred channels is "station memory".

Many types of station memories are already being sold on the market which can be divided into two main groups: those with automatic and those with manual television channel searching.
The automatic types are fitted with electronic searching circuits which locate television channels automatically when started by the user. This is done by scanning a given band (VHF or UHF, for example) and stopping on the located channel. Data relative to the located channel can then be memorised by the user in a memory circuit and the same channel recalled whenever required by simply pressing a button which recalls the said data from the memory and supplies it to the channel selection circuit.
This type of circuit is also fitted with components which sense, during search, if a television channel has been tuned into and disable automatic searching to prevent television band scanning from continuing. Most of these circuits are fitted with a phase detector which senses the coincidence between the sync signals received and those regenerated in the receiver (in particular, the flyback signal).
Manual station memories, on the other hand, are fitted with controls which, when activated by the user, start a device for scanning a given television band. These controls also stop the said device when required by the user. When the user sees the required channel appear on the screen, the device is stopped to disable search and enable the channel to be memorised in the appropriate circuit.
In these cases, the simplest way of starting and stopping the search is to fit the circuits with a button which, when pressed, supplies a search-start signal and, when released, stops the searching operation. For best tuning, two buttons are usually provided for band scanning in both directions.

The search tuning starts with pressing the key "S" and  an apparatus for indicating a tuned frequency of a tuner of a radio or television receiver, said tuner comprising a tank circuit employing a voltage controlled variable capacitance diode as a circuit element, which diode is supplied in a reverse direction with a scanning control voltage from a solid state potential memory device, which control voltage is set as a result of tuning of said tuner, said indicating apparatus comprising a plurality of light emitting diodes arranged in a line, each illuminating the corresponding frequency indicating region out of a plurality of divided frequency indicating regions of a frequency band to be received by said receiver, said regions being arranged in succession to cover said frequency band, and a corresponding plurality of drivers responsive to said control voltage for energizing the corresponding light emitting diode for illuminating the corresponding frequency region to which said tuned frequency pertains. In a preferred embodiment of the invention, the frequency indicating regions to be covered by the adjacent light emitting diodes are adapted to be overlapped in part at the ends thereof, so that the frequency in the overlapped portion in the region is indicated by said two adjacent light emitting diodes.Further the RF bands class are also displayed with leds in similar way.

 With this aim in view, the present invention provides a television tuning device comprising a circuit for continuously scanning at least one band of receivable frequencies, manual control means for starting and stopping the said scanning procedure, a terminal for applying a switch signal for switching from a first band-scanning speed to a second band-scanning speed lower than the first, and detection means for detecting the presence of a television channel by comparing the received sync signals with local signals generated in the television receiver, and applying a switch signal to the said terminal for switching from the said first scanning speed to the said second scanning speed in the presence of the said switch signal, so that the band scanning continues at said lower speed until the manual control means produce the stopping scanning procedure.

The set was featuring the PHILIPS 30AX CRT TUBE and first time the AUTOVOX MODULAR CHASSIS 130.The 30AX system, which Philips introduced in 1979, is an important landmark in the development of colour picture systems. With previous systems the assembly technician had to workthrough a large number of complicated setting-up procedures whenever he fitted a television picture tube with aset of coils for deflecting the electron beams. These procedures were necessary to ensure that the beams for the three colours would converge at thescreen for every deflection. They are no longer necessary with the 30AX system: for a given screen format any deflection unit can be combined  with any tube to form a single 'dynamically convergent' unit. A colour-television receiver can thus be assembled from its components almost as easily as a monochrome receiver. The colour picture tube of the PHILIPS 30AX system displays a noticeably sharper picture over the entire screen surface. This will be particularly noticeable when data transmissions such as Viewdata and Teletext are displayed. This has been achieved by a reduction in the size of the beam spot by about 30%. Absence of coma and the retention of the 36.5 mm neck diameter have both contributed to increased picture sharpness. Coma has been eliminated by means of corrective field shapers embedded in the deflection coils which are sectionally wound saddle types. The new deflection unit has no rear flanges. enabling uniform self-convergence to be obtained for all screen sizes. without special corrections, adjustments, or tolerance compensations. Horizontal raster distortion is reduced and no vertical correction is required. One of the inventions in 30AX is an internal magnetic correction system which obviates static convergence and colour purity errors. This enables the usual multiple unit to be dispensed with. together with the need for its adjustment !  New techniques have been employed to achieve close tolerance construction of the glass envelope. In addition, the 30AX picture tube incorporates two features whereby it can be accurately adjusted during the last stages of manufacture. One is the internal magnetic correction system. The other is an array of bosses on the cone that establish a precise reference for the axial purity positioning of the deflection unit on the tube axis and for raster orientation. During its manufacture, each deflection unit is individually adjusted for optimum convergence. The coil carrier also incorporates reference bosses that co-operate with those on the cone of the tube. ' Since every picture tube and every deflection unit is individually pre-aligned, any deflection unit automatically matches with any picture tube of the appropriate size. The deflection unit has only to be pushed onto the neck of the tube unit it seats. Once the reference bosses are engaged, the combination is accurately aligned and requires no adjustment for convergence, colour purity or raster orientation. With no multiple unit and a flangeless deflection unit, there is more space in the receiver cabinet. Higher deflection sensitivity means that less current is consumed, and consequently less heat is produced. This increases the reliability of the TV receiver again. 30AX means simple assembly. Any picture tube is compatible with any deflection unit of the appropriate size and is automatically self-aligning as well as being self-convergent.

The well-known 20AX features of HI-Bri, Soft-Flash and Quick-vision are maintained in the new 30AX systern.  In their work on the design of deflection coils in the last few years the developers have expanded  the magnetic deflectionfields into 'multipoles', Thisapproach has improved the understanding  of the relations between coil and field and between field and deflection to such an extent that  designing deflection units is now more like playing a difficult but fascinating game of chess than  carrying out the obscure computing procedure once necessary.

In their work on the design of deflection coils in the last few years the developers have expanded
the magnetic deflectionfields into 'multipoles', Thisapproach has improved the understanding
of the relations between coil and field and between field and deflection to such an extent that
designing deflection units is now more like playing a difficult but fascinating game of chess than
carrying out the obscure computing procedure once necessary.

Was using first and last time the VIDEO ASIC TDA3300B (MOTOROLA) instead of multi ASIC'S ics.
Motorola's third generation PAL decoder system (Chroma III) employs a single 40 -pin i.c., type TDA3300. Amongst the features of this i.c. are low dissipation, typically 600mW, with a single 12V supply; a patented 90° phase - shift system requiring no adjustment; and direct inputs for on -screen (data, TV games, etc.) displays, with a complementary fast blanking input. Of particular interest is the beam limiting and automatic black -level adjustment system, the latter making it unnecessary to incorporate preset controls to set up the black level. These arrangements rely on three high -voltage transistors to monitor the beam currents, providing feedback signals for the i.c.  If the reference voltage is exceeded, the beam current limiting action comes into operation, reducing the contrast. The system has been designed to enhance the set's video and digital signal handling capability. During the flyback time the feedback input impedance rises, activating a further internal comparator. This compares the tube's cut-off current (a hot cathode doesn't cut off completely) with another internal reference voltage. The resultant signal is integrated and added to the output (at the output clamp) to provide the automatic black -level correction. Readers may recall that a similar idea, using discrete circuitry, is employed in certain B and 0 colour chassis. The advantage is that the black level is held constant throughout the tube's life, with no grey scale drift.
A front display shows program channel number.

Tone control is present, Search tuning was even possible to start via remote !

The set is build with a Modular chassis design because as modern television receivers become more complex the problem of repairing the receiver becomes more difficult. As the number of components used in the television receiver increases the susceptibility to breakdown increases and it becomes more difficult to replace defective components as they are more closely spaced. The problem has become even more complicated with the increasing number of color television receivers in use. A color television receiver has a larger number of circuits of a higher degree of complexity than the black and white receiver and further a more highly trained serviceman is required to properly service the color television receiver.
Fortunately for the service problem to date, most failures occur in the vacuum tubes used in the television receivers. A faulty or inoperative vacuum tube is relatively easy to find and replace. However, where the television receiver malfunction is caused by the failure of other components, such as resistors, capacitors or inductors, it is harder to isolate the defective component and a higher degree of skill on the part of the serviceman is required.
Even with the great majority of the color television receiver malfunctions being of the "easy to find and repair" type proper servicing of color sets has been difficult to obtain due to the shortage of trained serviceman.
At the present time advances in the state of the semiconductor art have led to the increasing use of transistors in color television receivers. The receiver described in this application has only two tubes, the picture tube and the high voltage rectifier tube, all the other active components in the receiver being semiconductors.
One important characteristic of a semiconductor device is its extreme reliability in comparison with the vacuum tube. The number of transistor and integrated circuit failures in the television receiver will be very low in comparison with the failures of other components, the reverse of what is true in present day color television receivers. Thus most failures in future television receivers will be of the hard to service type and will require more highly qualified servicemen.
The primary symptoms of a television receiver malfunction are shown on the picture tube of the television receiver while the components causing the malfunction are located within the cabinet. Also many adjustments to the receiver require the serviceman to observe the screen. Thus the serviceman must use unsatisfactory mirror arrangements to remove the electronic chassis from the cabinet, usually a very difficult task. Further many components are "buried" in a maze of circuitry and other components so that they are difficult to remove and replace without damage to other components in the receiver.
Repairing a modern color television receiver often requires that the receiver be removed from the home and carried to a repair shop where it may remain for many weeks. This is an expensive undertaking since most receivers are bulky and heavy enough to require at least two persons to carry them. Further, two trips must be made to the home, one to pick up the receiver and one to deliver it. For these reasons, the cost of maintaining the color television receiver in operating condition often exceeds the initial cost of the receiver and is an important factor in determining whether a receiver will be purchased.
Therefore, the object of this invention is to provide a transistorized color television receiver in which the main electronic chassis is easily accessible for maintenance and adjustment. Another object of this invention is to provide a transistorized color television receiver in which the electronic circuits are divided into a plurality of modules with the modules easily removable for service and maintenance. The main electronic chassis is slidably mounted within the cabinet so that it may be withdrawn, in the same manner as a drawer, to expose the electronic circuitry therein for maintenance and adjustment from the rear closure panel after easy removal. Another aspect is the capability to be serviced at eventually the home of the owner.

This set has spark like pictures and colors and very high contrast and bright perfectly focused and was very reliable.


AUTOVOX SpA HISTORY

Giordano Bruno Verdesi founded in Rome in 1933 the Industry Italian Radio engineering, IRI, for the production of professional apparates, but this had its single development in 1945 with the war reconstruction post.

Previewing a strong development of the motorization, with Carlo Daroda, it comes up the Autovox SpA, with the specialization car radio production.

In 1953 the company is upgraded and constructed on the way Pays wages to Rome, the new plant for the production of television sets, antennas, car radio, transistor radio receivers, beyond a production of radiosondes and professional apparatuses for the aeronautical meteorology.

With the planning of the first car radio in the world, the leggendaria Bikini, in 1942 it begins a long season of successes like with the car radio Piper, the blue line with the first tuning electronic, the Kanguro the first car extractable stereo, mythical the Shuttle and Challenger the first car radio with the frequency synthesis, represents for Autovox, the flag stones in the development of new technologies, beyond to a complete range of television set (in black and white) of great reliability and from the pretty aesthetic.

Successively it realizes first in Europe, a color television set with fully transistorized chassis.
(To see the Internal Chassis Just click on Older Post Button on bottom page, that's simple !)

Some references and  Notes:

^ AA.VV., Capitolium vol. 43, 1968, p. 14 ^ "L' agonia dell'Autovox, cinquant'anni di fatti e misfatti romani" - Corriere della Sera, 10 aprile 1996 ^ Bruce Weber, Kusisto envisions rainbows ahead, in Billboard, 15 gennaio 1972. ^ Richard Robson, Motorola UK bows cassette units, in Billboard, 1º luglio 1972.
Istituto Mobiliare Italiano, SpA v. Motorola, 689 F. Supp. 812 (N.D. Ill. 1988), su Justia Law. URL consultato il 26 gennaio 2016. ^ Aldo Grandi, Insurrezione Armata, BUR - Rizzoli, 2005, ISBN 978-88-17-00758-0. ^ Il Mondo vol. 36, 1985, p. 65 ^ "ALLA FINANZIARIA PUBBLICA REL IL 54% DELLA NUOVA AUTOVOX" - Repubblica, 8 giugno 1985 ^ "CONVOCATI DAL TRIBUNALE I CREDITORI DELL' AUTOVOX" - Repubblica, 12 novembre 1987 ^ "AUTOVOX, BATTAGLIA VUOLE IL FALLIMENTO" - Repubblica, 19 novembre 1987 ^ "NOVE ' IN CORDATA' PER SALVARE L' AUTOVOX" - Repubblica, 4 luglio 1992 ^ *** ATTO COMPLETO ***, su www.gazzettaufficiale.it. URL consultato il 21 gennaio 2016. ^ nuova autovox: a nissan Italia complesso aziendale Capena | Agi Archivio, su archivio.agi.it. URL consultato il 20 gennaio 2016 (archiviato dall'url originale l'8 marzo 2016). ^ LA NISSAN FAVORITA PER L'ACQUISTO AUTOVOX - la Repubblica.it, su Archivio - la Repubblica.it. URL consultato il 20 gennaio 2016. ^ AUTOVOX, cordata romana per riaccendere l'autoradio, su archiviostorico.corriere.it. URL consultato il 20 gennaio 2016. ^ Nuova autovox:commissariata anche la autovox video system | Agi Archivio, su archivio.agi.it. URL consultato il 20 gennaio 2016 (archiviato dall'url originale il 2 febbraio 2016). ^ Rifiuti: a Roma nuovo impianto e prima centrale biogas | Agi Archivio, su archivio.agi.it. URL consultato il 20 gennaio 2016 (archiviato dall'url originale il 2 febbraio 2016). ^ ACCORDO AMA - AUTOVOX RISCHIO DI ROTTURA - la Repubblica.it, su Archivio - la Repubblica.it. URL consultato il 20 gennaio 2016. ^ "OCCUPAZIONE. L' Autovox licenzia 234 lavoratori" - Corriere della Sera, 11 giugno 1996 ^ Italia lavoro dismette quota in Roma multiservizi | Agi Archivio, su archivio.agi.it. URL consultato il 20 gennaio 2016 (archiviato dall'url originale il 2 febbraio 2016). ^ Studio Multimediale Hangloose, Impianto di selezione e produzione CDR Salario - Ama Roma S.p.A., su www.amaroma.it. URL consultato il 26 gennaio 2016.

Further reading;

P. Toscano - Le origini del capitalismo industriale nel Lazio: imprese e imprenditori a Roma dall'unità alla seconda guerra mondiale - Cassino, Università degli studi di Cassino, 2002, ISBN 888317089X.