SANYO CTP3203 YEAR 1974.

 

SANYO CTP3203  is a 16 inches (37cm) portable (heavy) color television with 7 programs preselections for VHF and UHF channels.

 The mechanical turret approach to television tuning has been used almost exclusively for the past over  60 years. Even though replete with the inherent disadvantages of mechanical complexity, unreliability and cost, such apparatus has been technically capable of performing its intended function and as a result the consumer has had to bear the burdens associated with the device. However, with the " recent " Broadcast demands for parity of tuning for UHF and VHF channels, the increasing number of UHF and cable TV stations have imposed new tuning performance requirements which severely tax the capability of the mechanical turret tuner. Consequently, attempts are now being made to provide all electronic tuning to meet the new requirements.

The invention relates to a tuning unit with bandswitch for high frequency receivers, especially radio and television receivers, having a potentiometer system for the control of capacity diodes, the said potentiometer system consisting of a plurality of parallel resistance paths along which wiper contacts can be driven by means of screw spindles disposed adjacent one another in a common insulating material housing in which a bandswitch formed of metal rods is associated with each tuning spindle.

In these tuning units, the working voltages of the capacity diodes in the tuning circuits are recorded once a precise tuning to the desired frequency has been performed. A potentiometer tuning system has great advantages over the formerly used channel selectors operating with mechanically adjustable capacitors (tuning condensers) or mechanically adjustable inductances (variometers), mainly because it is not required to have such great precision in its tuning mechanism.

Tuning units with bandswitches formed of variable resistances and combined with interlocking pushbuttons controlling the supply of recorded working voltages to capacity diodes are known. Channel selection is accomplished by depressing the knobs, and the tuning or fine tuning are performed by turning the knobs. The resistances serving as voltage dividers in these tuning units are combined into a component unit such that they are in the form of a ladderlike pattern on a common insulating plate forming the cover of the housing in which the tuning spindles and wiper contacts corresponding to the variable resistances are housed. The number of resistances corresponds to the number of channels or frequencies which are to be recorded. The wiper contact picks up a voltage which, when applied to the capacity diodes determines their capacitance and hence the frequency of the corresponding oscillating circuit. The adjustment of the wipers is performed by turning the tuning spindle coupled to the tuning knob. By the depression of a button the electrical connection between a contact rod and a tuning spindle is brought about and thus the selected voltage is applied to the capacity diodes. Since the push buttons release one another, it is possible simply by depressing another button to tune to a different receiving frequency or a different channel, as the case may be.

 Moreover, using this arrangement, the only indication--during adjustment--of which channel is selected is by station identification.

 

• Telescopic antenna is present above cabinet.
• All manual commands are front placed.
• Upper side Vertical frequency and Horizontal frequency adjustment knobs are present. 

• Backside: chrominance oscillator switch to reduce the visibility on television screens in black and white transmissions of interference patterns  under certain conditions (particularly noisy signal reception or transmiitter differences). However, in many practical applications, because of component tolerances, the operating threshold of the frequency detector may be expected to differ from an optimum design value. As well known, a composite color television signal comprises a luminance signal and a chrominance signal suppression modulated on a subcarrier in a line scanning period, apart from a horizontal and vertical synchronizing signals in a blanking period and a burst signal at the back porch of the horizontal synchronizing signal. In a typical color television receiver, a luminance signal, horizontal and vertical synchronizing signals, and a chrominance signal plus a burst signal are separated for the purpose of signal processing. For the purpose of processing a chrominance signal, a composite chrominance signal including a chrominance signal suppression modulated on a subcarrier and a burst signal is provided. On the other hand, a burst gate pulse is also provided to sample a burst signal in the composite chrominance signal. A subcarrier is locally generated responsive to the sampled burst signal and the original color signals are demodulated responsive to the chrominance signal and as a function of the locally generated subcarrier. In a color television receiver, after amplification and detection of the composite color signal, the luminance and chrominance components are separated and applied to luminance and chrominance channels, respectively, of the receiver for further signal processing. The synchronizing bursts of the color subcarrier are also applied to the chrominance section of the receiver.
  This configuration renders the color television receiver capable of reproducing either monomchrome or color signal broadcasts. For a color broadcast, the luminance and chrominance signals are processed through their respective channels and recombined at the picture tube to produce the color image. For a monochrome broadcast, the monochrome signal is processed in normal fashion through the luminance channel of the receiver and is applied to the picture tube to recreate the black and white image. However, in the absence of a color signal, it is necessary to disable the chrominance channel to avoid spurious color in the picture. This function is accomplished using color killer circuitry which is operative in response to an absence of color signals to cut off one of the stages of the chrominance channel.

• Also backside a couple of setpoints regulations  for white  balance. In a color CRT display system, when monochrome image data is reproduced, the same color temperature must be ensured despite the various brightnesses of the screen. To obtain such an image, the white balance is adjusted, i.e., the drive voltage of the video signal amplifier inside the color CRT display system is adjusted.To adjust a white balance, the light energies emitted from the three red, green, and blue color phosphors must be adjusted to a predetermined ratio. The light efficiencies of the light emitted from the currently used three color phosphors differ slightly, but the ratio of currents of the red, green, and blue electron beams for obtaining a white color is substantially the same. Therefore, it is sufficient to slightly adjust the ratio of the currents. There is some variation, however, with individual color CRT systems, so a manually regulated circuit is provided for the adjustment of the white balance.
  Usually, the white balance is adjusted by two types of adjustment: adjustment of the background to adjust the black levels of the individual color signals and adjustment of the drive voltage to adjust the white peak level of the video signal so that the pedestal level of the video signals (level close to substantially black) gives a completely black display.

• A service switch to obtain a feature of managing adjustments without removing the back.It is conventional practice in the television industry to adjust the G2 voltage of a receiver's CRT (cathode ray tube) so that the electron gun with the highest cut-off point is barely emissive.Television receivers normally employ a multi-gun color cathode ray tube with each one of the electron guns providing an electron beam. The cathode ray tube also utilizes a screen or surface having a plurality of phosphor areas which are impinged by the electron beams in a manner well known in the art. Moreover, the electron guns, the electron beams, and the phosphor areas all vary with respect to one another in each manufactured cathode ray tube. Such variations necessitate what is usually referred to as "setting-up" or adjusting the color cathode ray tube to achieve optimum operation.  To manually adjust the color temperature in a television receiver or a video display apparatus, various circuits in the television receiver are disabled including the vertical deflection circuit.

• Front command for  AFC ON/OFF switch.If there are any stations transmitting at frequencies in the space between the frequency at which the receiver was originally set and the frequency at which the AFC/AFT lets go, the output will not be detected by the receiver because of this effect on the AFC/AFT signal. For this reason, especially in FM receiver sets, there is provided an AFC ON/OFF switch whereby the AFC can be manually disabled during tuning. However, the purpose of this switch is usually not understood by the user of the set, so that the AFC/AFT is very seldom manually disabled when the set is being tuned. Even if it were understood, as it is left to the user to manually disable the AFC/AFT, it is quite conceivable that the switch will never be used. If it is used, it is possible that the user will forget to enable the AFC/AFT once he has completed tuning, so that the receiver will be operating without benefit of the AFC/AFT circuit.      It is known to use Automatic Frequency Control (AFC) and Automatic Fine Tuning (AFT) circuits for maintaining the tuning of frequency of receivers such as FM receivers and television receivers lined to the frequency of a selected radio or television station. Although AFC/AFT is useful for maintaining the alignment of frequencies when the receiver has been tuned, the signals provided by the AFC/AFT could provide problems when attempting to tune to a different station or channel. Specifically, if the AFC/AFT signal is strong enough, then the AFC will "pull" the receiver to the frequency at which it was last set even though the tuning dial is being turned. The AFC/AFT will only "let go" after the distance between the originally set frequency and the tuning dial is sufficiently large to overcome the effect of the AFC/AFT signal. 

• Features a Toshiba CRT tube triple electron gun members each having a cathode electrode, plane grid electrode and cylindrical electrodes coaxially arranged in succession are placed side by side in the same plane with a prescribed convergence angle defined therebetween.

 SANYO Electric Co., Ltd. (San'yō Denki Kabushiki-gaisha) (TYO: 6764, Pink Sheets: SANYY) is a major electronics company and member of the Fortune 500 whose headquarters is located in Moriguchi, Osaka prefecture, Japan. Sanyo targets the middle of the market and has over 230 Subsidiaries and Affiliates.



On December 21, 2009, Panasonic completed a 400 billion yen ($4.5 billion) acquisition of a 50.2% stake in Sanyo, making Sanyo a subsidiary of Panasonic.

 In July 2010, Panasonic announced to acquire the remaining shares of Sanyo.


Corporate culture

Sanyo utilizes an extensive socialization process for new employees, so that they will be acclimatized to Sanyo's corporate culture.

New employees take a five-month course during which they eat together and share company-provided sleeping accommodation. They learn everything from basic job requirements to company expectations for personal grooming and the appropriate way in which to address their coworkers and superiors.

History

Sanyo was founded when Toshio Iue (Iue Toshio, 1902–1969), the brother-in-law of Konosuke Matsushita and also a former Matsushita employee, was lent an unused Matsushita plant in 1947 and used it to make bicycle generator lamps. Sanyo was incorporated in 1950; in 1952 it made Japan's first plastic radio and in 1954 Japan's first pulsator-type washing machine.

 The company's name means three oceans in Japanese, referring to the founder's ambition to sell their products worldwide, across the Atlantic, Pacific and Indian oceans.


Technologically Sanyo has had good ties with Sony, supporting the Betamax video format from invention until the mid 1980s (the best selling video recorder in the UK in 1983 was the Sanyo VTC5000), and later being an early adopter of the highly successful Video8 camcorder format. More recently, though, Sanyo decided against supporting Sony's format, the Blu-ray Disc, and instead gave its backing to Toshiba's HD DVD. This was ultimately unsuccessful, however, as Sony's Blu-ray triumphed.


In North America, Sanyo manufactures CDMA cellular phones exclusively for Sprint-Nextel corporation's Sprint PCS brand in the United States, and for Bell Mobility in Canada.


The 2004 Chūetsu earthquake severely damaged Sanyo's semiconductor plant and as a result Sanyo recorded a huge financial loss for that year. The 2005 fiscal year financial results saw a 205 billion yen net income loss. The same year the company announced a restructuring plan called the Sanyo Evolution Project, launching a new corporate vision to make the corporation into an environmental company, plowing investment into strong products like rechargeable batteries, solar photovoltaics, air conditioning, hybrid car batteries and key consumer electronics such as the Xacti camera, projectors and mobile phones.

Sanyo's 3-year restructuring project


Sanyo posted signs of recovery after the announcement of positive operating income of 2.6 billion yen. Sanyo remains the world number one producer of rechargeable batteries. Recent product innovations in this area include the Eneloop Low self-discharge NiMH battery, a "hybrid" rechargeable NiMH (Nickel-metal hydride battery) which, unlike typical NiMH cells, can be used from-the-package without an initial recharge cycle and retain a charge significantly longer than batteries using standard NiMH battery design. The Eneloop line competes against similar products such as Rayovac's "Hybrid Rechargeable" line.


In December 2005 Sanyo had their new Super Sharp Technology patented.


In January 2006 Sanyo received a massive capital injection from Goldman Sachs, Sumitomo Mitsui Banking Corporation and Daiwa Securities which resulted in five members of the banks represented joining the nine-person Board of Directors.


On 24 November 2006, Sanyo announced heavy losses and job cuts.


Tomoyo Nonaka, a former NHK anchorwoman who was appointed Chairman of the company, stepped down in March 2007. The President, Toshimasa Iue, also stepped down in April of that year; Seiichiro Sano was appointed to head the company effective April 2007. In October 2007, Sanyo cancelled a 110 billion yen ($942 million) sale of its semiconducter business, blaming the global credit crisis for the decision and stating that after exploring its other options, it had decided to keep the business and develop it as part of its portfolio.


On April 1, 2008, they merged their cell phone division with Kyocera.


On November 2, 2008, Sanyo and Panasonic announced that they have agreed on the main points of a proposed buyout that would make Sanyo a subsidiary of Panasonic  and a formal announcement of the acquisition was made on Sanyo's web site on December 19, 2008.

They became a subsidiary of Panasonic on December 21, 2009.


On July 15, 2010 Sanyo agreed to sell its semiconductor operations to ON Semiconductor for $366 million to be completed before the end of 2010.

On July 29. 2010 Panasonic reached an agreement to acquire the remaining shares of Panasonic Electric Works and Sanyo shares for $9.4 billion.


By April 2012, parent company Panasonic plans to terminate the Sanyo brand, however it will be remain on some of the products where the Sanyo brand still hold value to consumers.

JAPAN IS STRANGE

Strange how situations change. It seems not so long ago that Japan and its industries, particularly electronics, could do no wrong. They taught us how to make cars and TV sets properly. They invested heavily and came up with a seem- ingly endless stream of desirable, innova- tive products. Both outsiders and insiders could see no end to this success story. We were told, by more than one leading Japanese electronics industrialist, that the 21st century would be the Japanese one, when Japan became predominant industri- ally and culturally. For the last couple of years the situation has been somewhat different. Japan is still the world's second largest economy, but the previous confidence has gone. The econo- my has stalled, and doesn't look like getting going again for some time. Profitability has become appalling, and the talk now is all of restructuring and job losses. Sony has announced that some 17,000 jobs will be lost worldwide, ten per cent of its workforce, while fifteen of its seventy factories are to be closed. Mighty Hitachi, whose activities span a much wider field and whose turnover is equivalent to over two per cent of Japan's gross domestic product, has launched a detailed review of its businesses. 6,500 of its 66,000 parent company employees are to be made redun- dant by March next year. On a consolidat- ed basis Hitachi is Japan's largest employ- er, with 330,000 staff. Businesses are to be dropped or reorganised. The story from Mitsubishi Electric is similar: there is to be a "sweeping restructuring of its portfolio of businesses". In the UK, the latest manifes- tation of this is the closure of Mitsubishi's VCR plant at Livingston. 14,500 jobs will go (8,400 in Japan) at Mitsubishi Electric, nearly ten per cent of the workforce. Other manufacturers who have announced poor results and restructuring recently include NEC, Matsushita, Sharp and Toshiba. It's all a long way since the time when, it seemed, all the Japanese had to do was to get the product right and produce more and more of it. Some of this was foreseeable. Markets reach saturation point; new products are not always a runaway success; if investment in new plant is excessive you end up with too much capacity; and so on. Then there is the fact that Japan is not isolated from econom- ic problems elsewhere: no economy that is heavily dependent on exports can be. But there are also more specific Japanese prob- lems. The banking system is beset by non- performing loans that Japanese bankers are reluctant to write off. The bubble economy of a few years ago, when asset values rose to unrealistic levels, collapsed. This is part of the cause of the banking system difficul- ties. Then there is the practice of cross - ownership, with firms owning substantial stakes in each other. This can work nicely when everything is doing well: when reces- sion looms, it aggravates the problems. Japan's unemployment rate hit a new high of 4.8 per cent (3.39m) in March, part- ly because of the corporate sector restructur- ing. Japanese industrialists hope to improve their profitability in the second half of the year, and will be helped by improved condi- tions in SE Asia. But it will be hard going, particularly to improve domestic market conditions. The Japanese have always had a high propensity to save. This increases when the economic climate is poor, with unemployment a threat. Right now Japanese consumers are saving rather than buying. No one seems to know how to alter their behaviour. There is also a demographic problem: the Japanese population is ageing. Japanese interest rates are negligible. So borrowing is not a problem. But conversely all those savings are bringing in little income. In the Western world interest rate changes often have a considerable impact on the economy. This economic tool is not available when interest rates are negligible. The Japanese have been advised to get their banking system sorted out, but that's not the sort of thing that can be done overnight. Right now the best opportunity for Japan seems to be to export its way out of its dif- ficulties, something that shouldn't be too difficult once worldwide expansion has resumed. But the high value of the yen is a drawback. From the economic viewpoint it's an extremely interesting situation, one in which the laws of economics have little to offer. This could be because such laws are, basically, descriptive rather than prescrip- tive. In the real world you can't always ini- tiate economic activity through monetary or fiscal means. Some commentators have gone so far as to suggest that the Japanese government should spend, spend, spend and print money to kick-start the economy. This is a dangerous course that can go badly wrong. It has already been tried by the Japanese government to a limited extent, with similarly limited success. The one thing that we do know is that economies are not stable. Change is ever present in one form or another. The prob- lem lies in trying to control it. This is all rather humbling, and certainly something of a comeuppance for the rather arrogant Japanese industrialists who had talked about the century of Japanese economic hegemony.

See also:

Osaka portalCompanies portal Kyocera Communications

List of digital camera brands
Mitsubishi Heavy Industries
Panasonic Wild Knights
Primearth EV Energy Co

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