PANASONIC TC-1785IR YEAR 1989

The PANASONIC TC-1785IR is a 17 inches (41cm) color portable television with 39 programs, remote, VST Tuning more specifically, the present  relates to a tuning voltage generating apparatus of a voltage synthesizer type for supplying a tuning voltage to a tuner employing a variable reactance element as a tuning element.
 

- A Scart socket is also present.

- Teletext unit is also present.

- The television receiver has an alphanumeric display which appears on the picture tube screen, to give the user data on the tuned channel number, colour settings and other operating data. The digital processor which generates the characters for display also controls the channel setting, etc., under the control of a digital remote control unit . The processor has an associated memory circuit for permanent tuning back up.

- The set was a first featuring the Panasonic Z3 Chassis series with high integration developed for portable sets and slightly smaller 14 inches such as the Panasonic TC1665 TC1675 and other types like TC1460 TC1465 TC1470.


- The set has still a contrast potentiometer on front panel and many others  too.

These sets aren't much around but they were good tellyes with super picture
(PHILIPS TUBE ! ) and a good deep sound even if mono.

A SCART Connector (which stands for Syndicat des Constructeurs d'Appareils Radiorécepteurs et Téléviseurs) is a standard for connecting audio-visual equipment together. The official standard for SCART is CENELEC document number EN 50049-1. SCART is also known as Péritel (especially in France) and Euroconnector but the name SCART will be used exclusively herein. The standard defines a 21-pin connector (herein after a SCART connector) for carrying analog television signals. Various pieces of equipment may be connected by cables having a plug fitting the SCART connectors. Television apparatuses commonly include one or more SCART connectors.

Although a SCART connector is bidirectional, the present invention is concerned with the use of a SCART connector as an input connector for receiving signals into a television apparatus. A SCART connector can receive input television signals either in an RGB format in which the red, green and blue signals are received on Pins 15, 11 and 7, respectively, or alternatively in an S-Video format in which the luminance (Y) and chroma (C) signals are received on Pins 20 and 15. As a result of the common usage of Pin 15 in accordance with the SCART standard, a SCART connector cannot receive input television signals in an RGB format and in an S-Video format at the same time.

Consequently many commercially available television apparatuses include a separate SCART connectors each dedicated to receive input television signals in one of an RGB format and an S-Video format. This limits the functionality of the SCART connectors. In practical terms, the number of SCART connectors which can be provided on a television apparatus is limited by cost and space considerations. However, different users wish the input a wide range of different combinations of formats of television signals, depending on the equipment they personally own and use. However, the provision of SCART connectors dedicated to input television signals in one of an RGB format and an S-Video format limits the overall connectivity of the television apparatus. Furthermore, for many users the different RGB format and S-Video format are confusing. Some users may not understand or may mistake the format of a television signal being supplied on a given cable from a given piece of equipment. This can result in the supply of input television signals of an inappropriate format for the SCART connector concerned.

This kind of connector is todays obsoleted !

They were reliable and durable in the majority.



Panasonic Corporation (Panasonikku Kabushiki-gaisha) (TYO: 6752, NYSE: PC), formerly known as Matsushita Electric Industrial Co., Ltd. ( Matsushita Denki Sangyō Kabushiki-gaisha), is a Japanese multinational consumer electronics corporation headquartered in Kadoma, Osaka, Japan. Its main business is in electronics manufacturing and it produces products under a variety of names including Panasonic and Technics. Since its founding in 1918, it has grown to become the largest Japanese electronics producer. In addition to electronics, Panasonic offers non-electronic products and services such as home renovation services. Panasonic was ranked the 89th-largest company in the world in 2009 by the Forbes Global 2000 and is among the Worldwide Top 20 Semiconductor Sales Leaders !

History

Panasonic was founded in 1918 by Konosuke Matsushita first selling duplex lamp sockets. In 1927, it produced a bicycle lamp, the first product it marketed under the brand name National. It operated factories in Japan and other parts of Asia through the end of World War II, producing electrical components and appliances such as light fixtures, motors, and electric irons. After World War II, Panasonic regrouped and began to supply the post war boom in Japan with radios and appliances, as well as bicycles. Matsushita's brother-in-law, Toshio Iue founded Sanyo as a subcontractor for components after WWII. Sanyo grew to become a competitor to Panasonic. Name For 90 years since establishment, the name of the company was always topped with "松下" ("Matsushita"). The company's name before 1 October 2008 had been "Matsushita Electric Industrial Co., Ltd.", used since 1935. In 1927, the company founder adopted a brand name "National" ( National) for a new lamp product, knowing "national" meant "of or relating to a people, a nation."[5] In 1955, the company labeled its export audio speakers and lamps "PanaSonic", which was the first time it used its "Panasonic" brand name. The company began to use a brand name "Technics" in 1965.[6] The use of multiple brands lasted for some decades.[6] In May 2003, the company put "Panasonic" as its global brand, and set its global brand slogan, "Panasonic ideas for life."[7] The company began to unify its brands to "Panasonic" and, by March 2004 replaced "National" for products and outdoor signboards, except for those in Japan[7]. On January 10, 2008, the company announced that it would change its name to "Panasonic Corporation" (effective on October 1, 2008) and phase out the brand "National" in Japan, replacing it with the global brand "Panasonic" (by March 2010). The name change was approved at a shareholders' meeting on June 26, 2008 after consultation with the Matsushita family. Panasonic owns RCTI, Global TV and MNC TV. Electronics In 1961, Konosuke Matsushita traveled to the United States and met with American dealers. Panasonic began producing television sets for the U.S. market under the Panasonic brand name, and expanded the use of the brand to Europe in 1979. The company used the National trademark outside of North America during the 1950s through the 1970s. (The trademark could not be used probably due to discriminatory application of trademark laws where brands like General Motors were registrable.) It sold televisions, hi-fidelity stereo receivers, multi-band shortwave radios, and marine radio direction finders, often exported to North America under various U.S. brand names. The company also developed a line of home appliances such as rice cookers for the Japanese and Asian markets. Rapid growth resulted in the company opening manufacturing plants around the world. National/Panasonic quickly developed a reputation for well-made, reliable products. The company debuted a hi-fidelity audio speaker in Japan in 1965 with the brand Technics. This line of high quality stereo components became worldwide favorites. The most famous product still made today is the SL-1200 record player, known for its high performance, precision, and durability. Throughout the 1970s and early 1980s, Panasonic continued to produce high-quality specialized electronics for niche markets such as shortwave radios, as well as developing a successful line of stereo receivers, CD players, and other components. Since 2004, Toyota has used Panasonic batteries for its Toyota Prius, an environmentally friendly car made in Japan. On January 19, 2006 Panasonic announced that, starting in February, it will stop producing analog televisions (then 30% of its total TV business) to concentrate on digital TVs. On November 3, 2008 Panasonic and Sanyo were in talks, resulting in the eventual acquisition of Sanyo. The merger was completed in December 2009, and resulted in a mega-corporation with revenues over ¥11.2 trillion (around $110 billion). As part of what will be Japan's biggest electronics company, the Sanyo brand and most of the employees will be retained as a subsidiary. In November 1999, the Japan Times reported that Panasonic planned to develop a "next generation first aid kit" called the Electronic Health Checker. At the time, the target market was said to be elderly people, especially those living in rural areas where medical help might not be immediately available, so it was planned that the kit would include support for telemedicine. The kits were then in the testing stage, with plans for eventual overseas distribution, to include the United States. In recent years the company has been involved with the development of high-density optical disc standards intended to eventually replace the DVD and the SD memory card. On July 29, 2010 Panasonic reached an agreement to acquire the remaining shares of Panasonic Electric Works and Sanyo shares for $9.4 billion. Panasonic and Universal Panasonic used to own Universal Studios, then known as the Music Corporation of America, since acquiring the company in 1990 but sold it to Seagram in 1995. Universal Studios is now a unit of NBC Universal.

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.

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AND STOP NOW SPRAYING CHEMICALS IN OUR SKY !

********************* ********************* ********************* ********************* *********************  

 

 

 

MAKE MANY PHOTO OF CHEMTRAILS AND SHARE THEM WORLDWIDE MILLIONS TIMES !!!
 

 FOR ALL OF US AND  THE GLOBAL BENEFIT !

 

 

READ HERE ------> (Tennessee State Senate Passes Bill Banning “Chemtrail” Spraying in Their Skies)

 

 

 

READ HERE ------> Arizona Legislature would ban geoengineering and certain other weather modification

 

 

 

READ HERE ------> Federal Agencies Admit Planes Alter Weather by Spraying Chemicals in the Sky

READ HERE ------> Bill Banning Geoengineering and Weather Modification Passes Florida Senate

( dubbed the “chemtrails bill” by the media )

PANASONIC TC-1785IR CHASSIS Z3 INTERNAL VIEW

 

 

 The Panasonic Z3 chassis was used in several 14, 16 17 and 21 in. models that were on sale during the years 1986-9. Models fitted with the chassis include the TC 1460, TC I465, TC 1470, TC 1475, TC 1665, TC 1675 and TC2175.

The Panasonic chassis Z3 is completely organized on one orizontal pcb board with all parts on it.
It has an uncommon parts placement in a semi diagonally mixed way starting from left to right.

Power Supply part is centrally placed, Line deflection + EHT on right side.

Signal part are left front placed, center side is the  video part, bottom right is the microcontroller section placed.

Tuner + IF is upper left placed

It uses the TDA3562A (PHILIPS) as a Lum+Chrom combination but it doesn't implement the automatic cut-off function of it.

MICOM - MN14841
IR PREAMP - uPC1475HA
EAROM - MN1220T  EAROM (Electrically Alterable ROM) 16bit, DIP-16.
The tuning voltage is supplied by TAHBX6270
The AN5071 is the integrated circuit incorporating TV tuner band-switch circuits and 31V-power-supply circuit.

The Panasonic Z3 chassis was used in several 14, 16 17 and 21 in. models that were on sale during the years 1986-8. Models fitted with the chassis include the TC 1460, TC I465, TC 1470, TC 1475, TC 1665, TC 1675 and TC2175.

The Z3 chassis is fairly complex , with everything under the control of an MN14841 microcomputer chip (IC1101). The self -oscillating chopper power supply STR55041N  also provides mains isolation. IC101 (AN5150N) contains the i.f. circuitry and the timebase generators. A somewhat unusual chip is the TAHBX6267 (IC501) which produces the sandcastle pulses at pin 7, a mute output from a coincidence detector at pin 10, and an `X-ray protection' output at pin 12. This output is fed to pin 27 of IC101, where it shuts down the line oscillator in the event of excessive beam current or a shorted line output transformer - input sensing is at pin 13, via zener diode D502 for beam current and D510 for a line output transformer short.

Power Supply Circuit:
Fig. 1 shows the basic power supply circuit. The chopper transistor Q3 is within the STR55041N chip IC801. It's connected as a blocking oscillator, with feedback to its base (pin 2) from a secondary winding on the transformer (T801) via R81

2 and C809. There are two other connections to pin 2. D809 feeds in pulses from a winding on the line output transformer to synchronise the operation of the chopper and line output stages. The other connection is to the collector of Q801, whose base senses the voltage across R811. This resistor is in series with the emitter of the chopper .transistor. In the event of excessive chopper current, the voltage across R811 rises and Q801 switches on, shorting out the input to the base of the chopper transistor. R803 supplies the chopper transistor with base bias, providing the start-up action and a discharge path for C809. D807 produces a negative voltage across C808. This voltage is applied to pin 1 of IC101 for regulation. Q1 is the error amplifier, comparing the fixed zener voltage at its emitter with the voltage produced at its base by a potential divider. Q1 's collector sets the voltage at the base of Q2, which in turn sets the d.c. conditions at the base of Q3.

No Life:
The first thing to do is to check the chopper circuit outputs. There should be 103V at TPE1 and 16V at TPE4. If both voltages are missing, check the 3.15A mains fuse F801. If this is open -circuit, check the bridge rectifier diodes (D801) and the chopper chip (IC801) for shorts. If the fuse is o.k. and there are low output voltages from the power supply IC801 is probably faulty. Check it by replacement. Low h.t. voltage can be caused by the C2408N rectifier D851 being defective, its 33μF reservoir capacitor C854 being open -circuit or the R2G over -voltage protection diode D854 being leaky. If these items are all o.k., there's probably a fault in the line output stage. If the line output transformer T551 goes short-circuit the voltage at pin 6 (h.t. input) falls. This is communicated via the MA165 diode D510 to pin 13 of the TAHBX6267 chip IC501, which produces a high output at pin 12. This shuts down the line oscillator in IC101. If T551 is not short-circuit, the main possibilities are that the 2SD1439RL line output transistor Q551 is short-circuit or T551 has shorted turns. Intermittent fuse blowing can be caused by the degaussing posistor D805.

A dead line output stage can also be caused by failure of the line driver stage. Check the driver transformer T531 for dry -joints then, if necessary, check whether the 11(12 feed resistor R531 or the 2SC1573AH driver transistor is open -circuit. There's an optocoupler (D811) in the power on/off circuitry in some models. If this is at fault there will be no operation. Also check, if necessary, Q1109 and the microcomputer chip IC1101. If the set is stuck in standby, check whether crystal X1101 is faulty or dry -jointed then suspect IC1101.

No Line Sync
For loss of line sync check whether C505 (4.7nF) or C506 (33nF) is short-circuit. If necessary check the associated components then replace IC101 (AN5150N).



Field Timebase faults
The field drive output from pin 26 of IC101 is fed to pin 4 of the AN5521 field driver/output chip IC451 via C467 (33μF, 25V) and R452 (18012). If the fault is field collapse, check the field oscillator waveform at pin 24 of IC101 (AN5150N). If it's missing, check R401 (33k12), R402 (201(12 - field hold) and C401 (l pF) which could be short-circuit. If it's o.k., check for a field drive output at pin 26. Replace IC101 if it's missing. The first check in the field output stage should be for 24V at pin 7 of IC451. If the supply is missing, check D555 (EU02) and 8482 (TSF19631) which could be open -circuit, and C572 (2,200pF, 35V) which could be short-circuit. Then check whether there's an output waveform at pin 2. Replace IC451 if there is no waveform here. Other possibilities for field collapse are open -circuit scan coils (check at pins 4 and 2 of connector E4), R461 (3.312, 0.5W) which could be open -circuit and C458 (1,000pF, 35V) which could be short-circuit. For lack of height, check the values of R455 (15012) and R456 (50012 - height control). R456's carbon track could be faulty. The other things to check are diodes D455 (MR4270L) and D453 (MA700), by replacement if necessary.

Picture Faults
Distorted picture: Check the voltage at pin 3 of IC101 (TPE9). The reading should be 4.5V. If it's incorrect, IC101 could be faulty, giving incorrect or no r.f. a.g.c. output. If the voltage is correct, check whether R104 (1M) is open -circuit or C14 (22pF, 16V) short-circuit. Double image/ringing effect: Check for dry -joints at the F1045A SAW filter X101. Resolder as necessary. Low contrast: Can be caused by an incorrect a.f.c. output from IC101 (AN5150N). If replacing IC101 doesn't provide a cure, check the components connected to pins 12, 13 and 14.


No Picture/Snowy Picture/Poor Sound
These symptoms can be caused by a faulty tuner. Check also that the receiver is tuning, and if so that it's memorising the channels. If this is not happening, check the TAHBX6289 memory protector chip IC1106. Check the voltages carefully. There should be 5V at pin 4. If this is missing or low, check whether D1112 (MA165) and/or C1130 (lpF, 50V) is open -circuit. Also ensure that the 5V series regulator transistor Q1105 (2SCI317) is operating correctly. The feed to its collector comes via R115 (1012) which could be open -circuit - this resistor also supplies the tuner's BU pin, via L18. If these points are in order, check that the -27V supply is present at pin 9 of the MN1220T memory chip IC1102. If this voltage is missing, check whether R552 (0.8212, 0.5W) or D553 (ERA22-04) is open -circuit and/or C563 (22pF, 50V) is short-circuit. Alternatively R1165 (27012 safety) could be open -circuit. If the -27V supply is present, suspect ICI 102. Check it by replacement. Returning to the tuner, check that its 12V supply is present at pin 2 (BM). The tuner is type ENV -87455F1. If the 12V supply is missing, check the filter components: C19 (33pF, 16V) could be short-circuit and/or R12 (8.2(2, 0.5W) open -circuit. Alternatively the L78M12N I2V regulator chip IC551 could be faulty. It should produce 12V at pin 3. If it has no input at pin 1, check whether R852 (0.82S2, 1W) is open -circuit (this will remove the 16V supply at TPE4). If still in trouble, check that the r.f. a.g.c. control R102 (21d2) is set up correctly. Its carbon track could be dirty - check by replacement. If R102 is o.k., suspect the AN5150N i.f./timebase generator chip IC101. Check the pin voltages carefully. If necessary, check it by replacement. If the problem is tuning drift, D1118 (pPC574J) could be leaky. The tuning voltage  is supplied by IC1104 (TAHBX6270). If there is no tuning, check whether its 33V supply is present at pin 3 -R1142 (100 safety) could be open -circuit. If loss of tuning or tuning drift is still the problem, check IC1104 by replacement.

Colour Faults
No sync/colour smearing: Check that the amplitude of the sandcastle pulses at pin 7 of the TDA3562 colour decoder chip IC601 is correct. If the pulses are missing, suspect IC501 (TAHBX6267). If necessary, check it by replacement.

Loss of one colour: Check whether the relevant 2SC1473A output transistor is open -circuit - Q351 (green), Q352 (blue) and Q253 (red). Alternatively one of the 1.5kil, 0.5W flashover protection resistors could be open -circuit - R367 (green), 8366 (blue), R365 (red). The bases of the output transistors should be at about 3.3V. If this voltage is incorrect, check the associated MA165 diodes (D357 and D351 red, D356 and D352 blue, D355 and D353 green). D355/6/7 are in the switch -off spot suppression circuit, with Q356, while D351/2/3 with Q355 and Q354 provide on -screen displays. If everything is in order on the tube base panel, check the RGB outputs at pins 10 (red), II (green) and 12 (blue) of the TDA3565 colour decoder chip IC601. If necessary, check IC601 by replacement.

No colour: First check whether the 8.8MHz crystal X601 is dry -jointed or faulty (replace to test). Then check the waveforms at pins 13, 14 and 18 of the TDA3562 colour decoder chip IC601. Pin 18 provides the feed to the chroma delay line circuit, whose outputs are fed to pins 13 and 14. There could be a fault in the delay line DL601 or an associated component. Check that the sandcastle pulses are present at pin 7. If missing, check the continuity between pins 7 of IC601 and IC501 (TAHBX6267) which produces the sandcastle pulses. There could be a track break, R621 (2200) could be open -circuit or IC501 could be faulty. If all these points are in order, check IC501 by replacement.

No/low Sound
The AN5265 audio amplifier chip IC251 should have a 16V supply at pin 9 and a 12V supply at pin 1. Check first that the 16V supply is present. If missing, check whether D853 (EU02), R852 (0.820, 1W) or R258 (120, 1W) is open -circuit. If D556 (RD5.6EB1) is short-circuit there will be no sound. If the 12V supply is missing, IC551 (L78M12N) could be faulty, R251 (1012 safety) open -circuit and/or C254 (100pF, 16V) short-circuit. If the supplies are o.k., suspect IC251. The cause of the problem could be IC101 (AN5150N), which produces a demodulated audio output at pin 11.

No Remote Control Operation
Some of the models that use the Z3 chassis feature remote control. If there is no remote control operation, check the handset - for poor battery connections and dry -joints to the LED and maybe the crystal. Worn touch pads can be a problem with the handset. Water damage is another possibility. Within the set, IC1105 (pPC1475HA) is the remote control receiver chip which is coupled to the MN14841 microcomputer chip IC1101. Problems here are minimal. Check that the I.t. supply is present at pin 9 of IC1105 - the reading should be about 5V. IC1105 can cause loss of remote control when faulty.


Video chrominance and Luminance with TDA3562A,
TDA3562A
TDA3562A (Philips)PAL/NTSC ONE-CHIP DECODER, DESCRIPTION


The TDA3562A is a monolithic IC designed as
decode PAL and/or NTSC colour television standards
and it combines all functions required for the
identification and demodulation of PAL and NTSC
signals.


.CHROMINANCE SIGNAL PROCESSOR

.LUMINANCE SIGNAL PROCESSING WITH
CLAMPING

.HORIZONTAL AND VERTICAL BLANKING
.LINEAR TRANSMISSION OF INSERTED
RGB SIGNALS
.LINEAR CONTRAST AND BRIGHTNESS
CONTROL ACTING ON INSERTED AND MATRIXED
SIGNALS
.AUTOMATIC CUT-OFF CONTROL
.NTSC HUE CONTROL

FEATURES:
· A black-current stabilizer which
controls the black-currents of the
three electron-guns to a level low
enough to omit the black-level
adjustment

· Contrast control of inserted RGB
signals

· No black-level disturbance when
non-synchronized external RGB
signals are available on the inputs
· NTSC capability with hue control.



APPLICATIONS
· Teletext/broadcast antiope

 Channel number display.


GENERAL DESCRIPTION

IIt follows that the external switches and filters which are required for the TDA3562A are not required for the TDA3566A. There is no difference between the amplitudes of the colour output signals in the PAL or NTSC mode. · The clamp capacitor at pins 10, 20 and 21 in the black-level stabilization loop can be reduced to 100 nF provided the stability of the loop is maintained. Loop stability depends on complete application. The clamp capacitors receive a pre-bias voltage to avoid coloured background during switch-on. · The crystal oscillator circuit has been changed to prevent parasitic oscillations on the third overtone of the crystal. Consequently the optimum tuning capacitance must be reduced to 10 pF.

The hue control has been improved (linear) .
CHROMINANCE SIGNALPROCESSOR
.LUMINANCE SIGNAL PROCESSING WITH CLAMPING
.HORIZONTAL AND VERTICAL BLANKING
.LINEAR TRANSMISSION OF INSERTED RGB SIGNALS
.LINEAR CONTRAST AND BRIGHTNESS CONTROL ACTING ON INSERTED AND MATRIXED SIGNALS
.AUTOMATIC CUT-OFF CONTROL .NTSC HUE CONTROL DESCRIPTION

The TDA3562A is a monolithic IC designed as decode PAL and/or NTSC colour television standards and it combines all functions required for the identification and demodulation of PAL and NTSC signals.