VESTEL 11AK19 User manual

SERVICEMANUAL
CHASSIS11AK19
FIRMEN:EUROLINE
PALLADIUM
S.E.G.
TECHLINE
VESTEL
.

CONTENTS
Contents ....................................*............................................................................................................................................. 1
Safety Precautions ........................................................................;.......................................................................................... 2
TV Set switched off ..................................................................................................................................................................2
Measurements.......................................................................................................................................................................... 2
PERI-TV SOCKET ...................................................................................................................................................................2
SCART 1................................................................................................................................................................................... 2
SCART 2................................................................................................................................................................................... 2
INTRODUCTION ...................................................................................................................................................................... 2
SMALL SIGNAL PART WITH TDA884X.................................................................................................................................. 2-3
TUNER...................................................................................................................................................................................... 4
VIDEO SWITCH TEA6415C .................................................................................................................................................... 4
AM DEMODULATOR TDA9830 ............................................................................................................................................... 4-5
DIGITAL TV SOUND PROCESSOR TDA9875 .......................................................................................................................5
SOUND OUTPUT STAGE TDA2614/TDA2615/TDA2616Q.................................................................................................... 5
VERTICAL OUTPUT STAGE WITH TDA8351/TDA8356........................................................................................................ 6
VIDEO OUTPUT AMPLIFIER TDA6107Q ............................................................................................................................... 6
SINGLE/MULTISTANDARD VIF/SIF-PLL and FM-PLL/AM DEMODULATOR TDA9818....................................................... 6
COMB FILTER SAA4961 .........................................................................................................................................................6
POWER SUPPLY (SMPS)....................................................................................................................................................... 6
MICROCONTROLLER SDA525X ............................................................................................................................................ 6
SERIAL ACCESS CMOS 8K (1024*8) EEPROM ST24C08 ...................................................................................................6
CLASS AB STEREO HEADPHONE DRIVER TDA1308......................................................................................................... 7
SAW FILTERS.......................................................................................................................................................................... 7
ICDESCRIPTIONS AND INTERNAL BLOCKDIAGRAM.......................................................................................................7
TDA8840H'DA8842/TDA8844 ...........................................................................................................................................7-8
UV1315/UV1316/UV1336 ..................................................................................................................................................9-10
TEA6415C.......................................................................................................................................................................... 10
TDA9830 ............................................................................................................................................................................10
TDA2614/TDA2615/TDA2616Q......................................................................................................................................... 11-12
TDA8351/TDA8356............................................................................................................................................................ 12
TDA6107Q .........................................................................................................................................................................13
SAA4961 ...............................................................-.............,........................................................................—...............13-14
MC44604............................................................................................................................................................................ 14-15
SDA525X............................................................................................................................................................................ 16-17
TDA9875 ............................................................................................................................................................................ 17-18
TDA9818 ............................................................................................................................................................................18
ST24C08 ............................................................................................................................................................................18
TDA1308 ............................................................................................................................................................................ 18
G1965M.............................................................................................................................................................................. 18
TDA9855 ............................................................................................................................................................................ 19
AK19CHASSISMANUALADJUSTMENTPROCEDURE...................................................................................................... 20
For AdjustSettings.............................................................................................................................................................20
WHITEBALANCEADJUSTMENT .................................................................................................................................... 20
AGC ADJUSTMENT .......................................................................................................................................................... 20
IF-PLLNEGATIVE ADJUSTMENT.................................................................................................................................... 20
IF-PLL POSITIVE ADJUSTMENT ..................................................................................................................................... 20
LUMINANCE DELAY ADJUSTMENT ................................................................................................................................20
VERTICAL ZOOM ADJUSTMENT ....................................................................................................................................20
VERTICAL SCROLL ADJUSTMENT................................................................................................................................. 20
43 HORIZONTAL SHIFTADJUSTMENT................................................................................................................... 20
43 VERTICALSLOPE ADJUSTMENT....................................................................................................................... 20
43 VERTICALAMPLITUDEADJUSTMENT.............................................................................................................. 21
43 S-CORRECTIONADJUSTMENT.......................................................................................................................... 21
43 VERTICALSHIFTADJUSTMENT......................................................................................................................... 21
43 EW WIDTHADJUSTMENT................................................................................................................................... 21
43 EW PARABOLA WIDTHADJUSTMENT .............................................................................................................. 21
43 EW CORNERPARABOLA ADJUSTMENT........................................................................................................................21
43 EW TRAPEZIUM ADJUSTMENT........................................................................................................................................21
169HORIZONTALSHIFTADJUSTMENT.................................................................................................................................21
16 9 VERTICAL SLOPE ADJUSTMENT ..................................................................................................................................... 21
16 9 VERTICALAMPLITUDE ADJUSTMENT........................................................................................................................... 21
169 S-CORRECTION ADJUSTMENT.........................................................................................................................................21
16 9 VERTICAL SHIFT ADJUSTMENT....................................................................................................................................... 21
16 9 EW WIDTH ADJUSTMENT.................................................................................................................................................. 21
16 9 EWPARABOLAWIDTHADJUSTMENT...........................................................................................................................21
16 : 9 EW CORNERPARABOLA ADJUSTMENT ....................................................................................................................... 22
16: 9 EW TRAPEZIUMADJUSTMENT.......................................................................................................................................22
For Option Settings ..................................................................................................................................................................................... 22
OPTION 00 .......................................................................................................................................................................................... 22
OPTION 01 .......................................................................................................................................................................................... 23
OPTION 02 .......................................................................................................................................................................................... 23
OPTION 03 .......................................................................................................................................................................................... 23-24
OPTION 04 .......................................................................................................................................................................................... 24
OPTION05 ..........................................................................................................................................................................................24
OPTION 06 .......................................................................................................................................................................................... 24
OPTION 07 .......................................................................................................................................................................................... 24-25
OPTION 08 .......................................................................................................................................................................................... 25
OPTION 09 ..........................................................................................................................................................................................25
OPTION 10 ...... .................................................................................................................................................................................25
GENERAL BLOCK DIAGRAM OF CHASSIS AK19 .............................................................................................................................. 26
ELECTRONIC COMPONENT PART LIST............................................................................................................................................... 27-28

DONOTCHANGE ANY MODULEUNLESSTHESETISSWITCHOFF
Themainssupplyside ofthe switch modepowersupplytransformer islive.
Useanisolatingtransformer.
Thereceivers fulfill completelythesafety requirements.
Safetyprecautions:
Servicingof thisTV shouldonlybecarriedoutbya qualifiedperson.
-Components markedwith the warning symbolonthecircuitdiagramarecriticalforsafetyandmustonlybereplacedwithanidentical
component.
-Power resistor andfusable resistorsmustbemountedinanidenticalmannerto theoriginalcomponent.
-When servicing thisTV,check thatthe EHTdoes notexceed 26kV.
TV Setswitched off:
Makeshort-circuit between HV-CRT clipandCRT groundlayer.
ShortC804 (150mF) before changingIC802orothercomponentsinprimarysideofSMPS.
Measurements:
Voltage readingsandoscilloscopetraces are measured underfollowing conditions.
Antenna signal60dBfrom colourbar generator.(100%white,75%coloursaturation)
Brightness,contrast, colour set for a normalpicture.
Mainssupply,220VAC,50Hz.
PERI-TV SOCKET
2 4 6 8 10 12 141618 20
SCART 1 (SC050)SCART 2 (SC051)
1Audiorightoutput0,5Vrms /1K 1 AudiorightoutputO.SVrms /1K
2Audio rightinput0.5Vrms/10K2 Audiorightinput0.5Vrms/10K
3Audio leftoutput0.5Vrms/1K3 Audioleftoutput0.5Vrms/1K
4Ground AF 4 Ground AF
5GroundBlue5 Ground Blue
6Audio left input0.5Vrms/10K6 Audioleftinput0.5Vrms/10K
7Blueinput0.7Vpp/ 75ohm 7 Blueinput0.7Vpp/ 75ohm
8AV switching input0-12VDC/10K8 AV switchinginput0-12VDC/10K
9GroundGreen9 Ground Green
10 - 10 -
11Green input0.7Vpp/75ohm 11-
12- 12 -
13Ground Red 13GroundRed
14Ground Blanking14Ground Blanking
15Red input0.7Vpp/75ohm 15-
16Blanking input0-0.4VDC, 1-3VDC/75ohm16-
17Ground CVS output 17Ground CVS output
18Ground CVS input18Ground CVS input
19CVS output1Vpp/75ohm19CVS outputIVpp/75ohm
20 CVS input1Vpp/75ohm20CVS input1Vpp/75ohm
21 Ground 21 Ground
1.INTRODUCTION
11AK19 isa 90e and 1100 chassis capable ofdriving 20-21",24",25",28-29",32",33" tubes atappropriate currents.
The chassis iscapableofworking inbothPALandSECAM. Thesound system iscapable of giving6watts
RMS outputintoa loadof 8ohms.
One 8 pagesimpleTELETEXT, TOPTEXT andFASTEXT isprovided.
The chassisisequippedwith 21-pinscart connectorswhich canaccept viascarttheSVHSformatfromVCRs soequipped.
2.SMALL SIGNAL PART WITH TDA884X
The TDA8840/8842/8844 combine allsmallsignalfunctions required for a colourTV receiver,except tuning.
2.1.Vision IFamplifier
The IF-amplifiercontains 3 AC-coupled control stages with a totalgaincontrol rangewhich ishigherthan 66dB.
The sensitivity of the circuitiscomparable with thatof modemIF-IC's. Thevideo signalisdemodulatedbymeansofa PLL
carrier regenerator. Thiscircuitcontains a frequency detector anda phase detector. TheAFC outputisobtainedbyusingthe
VCO control voltage ofthe PLL andcanbe readvia the PC-bus.Forfast search tuning systemsthewindow of
the AFC can beincreased with a factor 3.Thesettingisrealisedwith the AFW bit.
Depending on the typethe AGC-detector operates ontop-sync level(singlestandardversions) orontop syncand top
white-level (multistandard versions). The demodulation polarity is switched via the rc-bus. The AGC detector time-constant capacitor
isconnected externally.Thismainlybecause oftheflexibilityofthe application.Thetime-constantof the AGC system duringpositive
2

modulationisratherlongtoavoidvisiblevariationsofthesignalamplitude,lo improvemespeed01meAUUsystem a circuithas
beenincludedwhichdetects whether the AGC detector isactivated every frame period.Whenduring3 frame periodsnoactionis
detected the speed of the system isincreased.Forsignalswithoutpeakwhite informationthesystem switches automaticallyto a
gated black level AGC. Becausea blacklevelclamppulseisrequired(orthiswayofoperationthecircuitwillonlyswitchto blacklevel
AGC inthe internal mode.
The circuits contain a videoidentificationcircuitwhichisindependentofthesynchronisationcircuit.Therefore searchtuningis
possiblewhen thedisplaysection of the receiver isused asa monitor.Theidentoutputissuppliedto the tuningsystem via
the PC-bus. The video identcircuitcanbemadelesssensitivebymeansofthe STMbit.Thismodecanbeusedduringsearchtuning
to avoid that the tuning system willstop atvery weak inputsignals.
2.2.Video Switches
Thecircuits havetwo CVBS inputs(internalandexternalCVBS) andY/C input.When theY/C inputisnotrequiredtheY inputcanbe
used asthird CVBS input.The selection ofthevarioussources ismadeviathePC-bus.ThecircuithasoneCVBS output.
2.3.SoundCircuit
The sound band passandtrapfilters have to beconnected externally.Thefiltered intercarriersignalisfed to a limitercircuit
andisdemodulated bymeans ofa PLLdemodulator.ThisPLLcircuittunesitselfautomatically to theincomingcarrier signal
so that noadjustmentisrequired.
Thevolume iscontrolled via the PC-bus. Thedeemphasiscapacitor hasto beconnected externally.Thenon-controlled audio
signal can beobtainedfromthispin.The FMdemodulator can bemutedvia the PC-bus.Thisfunction canbeusedto switch-off
thesound duringa channel changeso that highoutput peaksareprevented.The TDA8840/8842containanautomaticvolume
levelling(AVL) circuit which automaticallystabilisestheaudiooutputsignalto a certain levelwhich canbeset bythe viewer bymeans
of the volume control. Thisfunction prevents bigaudiooutputfluctuations dueto variationsofthe modulationdepthof the transmitter.
The AVL function can beactivated viathePC-bus.
2.4.Synchronisation circuit
Thesync seperator ispreceded bya controlledamplifierwhichadjuststhe syncpulseamplitudeto a fixedlevel.Thesepulsesarefed
to the slicing stage which isoperating at50% ofthe amplitude.The separated syncpulsesare fed to the first phasedetector andto the
coincidence detector. Thiscoincidence detector isused to detect whether the lineoscillatorissynchronisedandcanalsobeusedfor
transmitter identification. The first PLL has a very highstaticalsteepnessso thatthe phaseofthe pictureisindependentofthe line
frequency.
The horizontal outputsignalisgenerated bymeansofanoscillatorwhich isrunningattwicethelinefrequency.Itsfrequencyisdivided
by2 to lockthe first control loop to the incomingsignal.Thetime-constant ofthe loopcanbeforced bythe PC-bus(fast orslow).
Ifrequired the 1Ccan select the time-constant dependingonthe noisecontent oftheincomingvideo signal.
Toprotect the horizontal outputtransistor, thehorizontaldriveisimmediately switched off when a power-on-reset isdetected.
The drive signalisswitched-on againwhen the normalswitch-on procedure isfollowed.
Viathe PC-bus, adjustments can bemadeofthehorizontalandverticalgeometry.The vertical sawtooth generator drives the
vertical output drive circuit which has a differential outputcurrent. FortheEWdrivea single ended currentoutputisavailable.
When the horizontal scanisreduced to display4 : 3 picturesona 16: 9 picturetubeanaccuratevideoblankingcan beswitchedon
to obtain well defined edges onthe screen.
Overvoltage conditionscan bedetected viatheEHTtrackingpin.WhenanovervoKageconditionisdetectedthehorizontaloutput
drive signalwillbeswitched-off viathe slow stop procedure butitisalsopossiblethatthe driveisnot switched-off andthatjust a
protection indicationisgiveninthePC-busoutputbyte.ThechoiceismadeviatheinputbitPRO.
2.5.Chroma and Luminance processing
The circuits contain a chroma bandpass andtrapcircuit.Thefilters arerealisedbymeansofgyratorcircuitsandtheyare
automatically calibratedby comparing the tuningfrequency withtheX-tal frequency ofthe decoder.
The luminancedelay lineand the delay forthe peaking circuitare alsorealisedbymeansof gyrator circuits.
Thecentre frequency of the chroma bandpassfilterisswitchableviathePC-bussothattheperformance canbeoptimisedfor
"front-end" signalsandexternal CVBS signals.
DuringSECAM reception thecentrefrequencyofthechromatrapisreducedtogeta bettersuppressionoftheSECAM
carrier frequencies.
2.6.Colour Decoder
Thedecoder contains analignment-free X-tal oscillator,a killercircuitandtwo colourdifferencedemodulators.The90°phaseshiftfor
the reference signalismadeinternally.
The1Ccontains anautomatic colour limiting(ACL) circuitwhichprevents thatoversaturationoccurswhen signalswith a high
chroma-to-burst ratio are received. TheACL circuitisdesigned suchthatitonly reducesthe chromasignalandnottheburstsignal.
Thishas the advantage that the colour sensitivity isnotaffected by thisfunction.
Thebase-band delay lineisintegratedinthe PAL/SECAM 1C's.
Thedemodulated colour difference signals are internallysuppliedtothedelayline.Thematrixedsignalsareexternallyavailable.
Thecolour difference matrix switches automatically between
PAL/SECAM andNTSC,however,itisalsopossibleto fixthe matrixinthePALstandard.
Which colour standardthe1Ccan decodedepends ontheexternal X-tals. TheX-tal to beconnectedto pin34musthavea frequency
of3.5MHz(NTSC-M, PAL-M orPAL-N) andpin35 canhandleX-tals witha frequency of 4.4and3.5MHz. Topreventcalibration
problemsofthe horizontaloscillator the externalswitchingbetweenthe 2 X-tals shouldbecarriedoutwhen theoscillator isforced to
pin35.Fora reliablecalibration of the horizontal oscillatoritisvery importantthatthe X-tal indicationbits(XA andXB) arenot
corrupted. For this reason the X-tal bitscanberead intheoutputbytessothatthesoftware canchecktheW-bustransmission.
2.7.RGB output circuit andblack-current stabilisation
Thecolour-difference signalsare matrixedwith theluminance signalto obtaintheRGB-signals.TheTDA884Xdevicehasonelinear
RGB input.ThisRGB signalcanbecontrolledoncontrast andbrightness.
The outputsignalhasanamplitudeofabout2 volts black-to-whiteatnominalinputsignalsandnominalsettingsofthecontrols.
Toincrease the flexibility ofthe1Citispossibleto insertOSD and/orteletext signalsdirectlyatthe RGB outputs.
This insertionmode iscontrolled viathe insertioninput(pin26intheS-DIP56- andpin38 intheQFP-64level).Thisblankingaction
atthe RGB outputs hassome delay whichmustbecompansated externally.
Toobtain anaccurate biasingofthe picturetubea "ContinuousCathodeCalibration"circuithasbeendeveloped.
Thisfunction isrealised bymeansofa 2-pointblacklevelstabilisationcircuit.
When the TV receiver isswitched-on, the RGB outputsignalsareblankedandtheblack currentloopwilltry to set the rightpicture
tubebiaslevels.ViatheAST bita choicecanbemadebetweenautomaticstart-upora start-upviathem-processor.

3.TUNER
Eithera PLLora VST tunerisusedasa tuner.
UV1316(VHF/UHF)isusedasa PLLtuner.ForonlyPALM/N,NTSCM applicationsUV1336isusedasthe PLLtuner.UV1315(VHF/
UHF)isusedasaVSTTuner.
ChannelcoverageofUV1316:
BAND
Low Band
MidBand
HighBand
OFF-AIR CHANNELS
CHANNELS
RANGE(MHz)
E2toC
E5toE12
E21 to E69
FREQUENCY
48.25to 82.25(1)
175.25 to 224.25
471.25 to 855.25 (2)
CABLE CHANNELS
CHANNELS
S01 to S08
S09 to S3 8
S39toS41
FREQUENCY
RANGE(MHz)
69.25to 154.25
161.25to439.25
447.25 to 463.25
(1). Enough marginisavailableto tune down to 45.25MHz.
(2).Enoughmarginisavailableto tune upto 863.25MHz.
NoiseTypicalMax.
Lowband: 5dB9dB
Midband: 5dB9dB
Highband: 6dB9dB
ChannelCoverageUV1336:
GainMin.
All channels: 38dB
GainTaper(of-air channels): -
Typical
44dB
Max.
52dB
8dB
BAND
LowBand
MidBand
HighBand
CHANNELS
2toD
EtoPP
QQ to 69
FREQUENCY
RANGE (MHz)
55.25to139.25
145.25to391.25
397.25to801.25
Noiseistypically6dBfor allchannels.Gainisminimum38dBandmaximum50dBfor allchannels.
ChannelCoverage ofUV1315:
BAND
LowBand
MidBand
HighBand
OFF-AIR CHANNELS
CHANNELS
E2toC
E5to E12
E21 to E69
FREQUENCY
RANGE (MHz)
48.25(082.25(1)
175.25to224.25
471.25 to 855.25(2)
CABLE CHANNELS
CHANNELS
S01 to S10
S11 toS39
S40to S41
FREQUENCY
RANGE (MHz)
69.25to 168.25
231.25to447.25
455.25to 463.25
(1).Enoughmarginisavailableto tunedown to 45.25MHz.
(2). Enoughmarginisavailableto tuneupto 863.25MHz.
Noise
Lowband
Midband
Highband
Typ.
:6dB
:6dB
:6dB
Max.
9dB
10dB
11dB
Gain
All Channels
GainTaper
(off-airchannels)
Min.
38dB
•
Typ.
44dB
•
Max.
50dB
8dB
4.VIDEO SWITCH TEA6415C
Incaseofthreeormoreexternalsourcesareused,thevideoswitch1CTEA6415Cisused.Themainfunctionofthisdevice istoswitch
8video inputsources onthe6 outputs.
Eachoutput can beswitched ononly oneof eachinput.Oneach inputanalignmentofthe lowestlevel ofthe signalismade(bottom
ofsync. top for CVBS or blacklevel for RGBsignals).
Each nominalgainbetween anyinputandoutputis6.5dB.ForD2MACorChroma signalthealignmentisswitched off by forcing, with
anexternal resistor bridge,5VDC onthe input.Eachinputcanbeusedasa normalinputorasa MACorChromainput(withexternal
resistorbridge).All the switching possibilitiesarechangedthroughthe BUS.
Driving75ohmloadneedsanexternalresistor.
Itispossibleto havethe sameinputconnected to several outputs.
5.AMDEMODULATORTDA9830
TheTDA9830 isdesignedfor AM-sound demodulationusedinL andL"standard.

SoundIFInput:
The soundIFamplifierconsists ofthreeAC-coupled differentialamplifierstages eachwithapproximately20dBgain.
At the output ofeach stageisa multiplierfor gaincontrolling.The overallcontrolrangeisapproximately-6to +60dBandthe
frequency response(-3dB)oftheIFamplifierisapproximately6 to 70MHz.Thesteepnessofgaincontrol isapproximately10mV/dB.
IFAGC:
The automaticgaincontrolvoltageto maintaintheAM demodulatoroutputsignalataconstantlevelisgeneratedbya mean
leveldetector.The AGC-detector charges anddischargesthe capacitoratpin3 controlledbythe outputsignalofthe
AM-demodulator compared to aninternalreference voltage.Themaximumcharge/dischargecurrentisapproximately 5 mA.
AM-demodulator
The IFamplifier outputsignalisfed to a limitingamplifier(twostages)andto a multipliercircuit.
However the limiteroutputsignal(whichisnotanymore AM modulated)isalsofed to the multiplier,which providesAM
demodulation(inphase demodulation).After lowpassfiltering(fg@ 400kHz)for carrierrejectionandbuffering,
the demodulator outputsignalispresent atpin6.
Audio Switch
This circuit isanoperationalamplifierwith three inputstagesandinternalfeedbacknetworkdetermininggain(OdB)and
frequency response (fg @ 700kHz).Two oftheinputstagesare connected to pin7 andpin9,the thirdinputstageto an
internalreference voltage.Controlledbythe switchingpins10and12,oneofthethreeinputstages canbeactivatedanda
choice madebetween two different AFsignalsormutestate. The selected signalispresent atpin8.Thedecouplingcapacitors
atthe inputpinsareneeded, because the internallygeneratedbiasvoltagefor theinputstages mustnotbeinfluenced
bytheapplicationinorderto avoidOC-plopincaseofswitching.
ReferenceCircuit:
This circurt-isa bandgapstabiliserincombinationwitha voltage regulationamplifier,whichprovidesaninternalreference voltage
ofabout 3.6V nearly independent from supplyvoltage andtemperature. Thisreference voltageisfiltered bythe capacitorat
pin4 inorder to reducenoise. Itisused asa reference to generateallimportantvoltages andcurrentsof the circuit.
Forapplication in12Vpower supply concepts,there isaninternalvoltage dividerincombinationwitha Darlingtontransistorin
order to reduce the supplyvoltage for all1Cfunctionblockstoapproximately6V.
6.DIGITAL TV SOUND PROCESSOR TDA9875
The TDA9875 isa single-chipDigitalTV SoundProcessor.
Supported standards are M,B/G,D/K,I andL.
Description ofthe demodulator and decoder section:
SIFInput:
Two inputpins are provided, SIF1 e.g.forterrestrial TV andSIF2e.g.for a satellitetuner.Theselected signalispassedthrough an
AGC circuitandthendigitizedbyan8-bitADC operatingat24.576MHz.
AGC:
The gainofthe AGC amplifieriscontrolledfrom the ADC outputbymeansofa digitalcontrolloopemployinghysteresis.
The AGC has a fast attack behaviour to prevent ADC overloadsand slowdecaybehaviourAGC oscillations.
For AM demodulationAGC mustbeswitched off.
Mixer
The digitized inputsignal isfedto the mixers,which mixoneorbothinputsoundcarriersdownto zeroIF.A 24-bitcontrolword for
eachcarrier sets the required frequency.
FMand AM Demodulation
An FMorAM inputsignal isfed viaa band-limitingfilterto a demodulatorthatcanbeusedfor eitherFMorAM demodulation.
Apart fromthe standard (fixed) de-emphasis characteristic, anadaptivede-emphasisisavailableforencodedsatelliteprograms.
Astereo decoder recovers theleftandrightsignalchannels from the demodulatedsoundcarriers.
FMIdentification:
The identification oftheFMsound modeisperformed byAM synchronousdemodulationofthepilotsignalandnarrow-banddetection
of the identification frequencies. The resultisavailableviathe TC-businterface.
NICAM Demodulation:
The NICAM signal istransmitted ina DQPSK code ata bitrateof 728 kbit/s.The NICAMdemodulatorperforms DQPSK
demodulationandfeeds the resultingbitstream andclocksignalontotheNICAM decoderand,for evaluationpurposes,to PCLK
(pin1)and NICAM (pin2).
NICAMDecoder:
The device performs alldecodingfunctionsinaccordancewiththe"EBUNICAM728specification".After lockingto theframe
alignmentword, the data isdescrambledbyapplying thedefinedpseudo-randombinarysequence;the device willthensynchronise
to the periodicframe flagbitCO.
Thestatus of the NICAM decoder can bereadoutfrom the NICAM statusregister bytheuser.TheOSB bitindicatesthatthe
decoder haslocked to the NICAM data.The VDSP bitindicates thatthe decoderhaslockedtotheNICAMdataandthatthe
data isvalid sound data.
7.SOUND OUTPUTSTAGE TDA2614H'DA2615n'DA26160
TDA2614 isusedasthe AF outputamplifierfor monoapplications.Itissuppliedby±12VDC comingfrom a separatewindinginthe
SMPS transformer. Anoutputpower of2'6W (THD=0.5%)canbedeliveredintoan8ohmload.
TDA2615isusedasthe AF output amplifier for stereo applications.Itissuppliedby
±12VDCcoming from a separate windinginthe SMPS transformer.An outputpower of2'6W (THD=0.5%)
can bedelivered intoan 8ohm load.
TDA2616Q isused astheAF outputamplifierfor stereo anddolbyprologicapplications.Itissuppliedby±16VDCcoming from
aseparate winding inthe SMPStransformer.An outputpowerof2'12W(THD=0.5%)canbedeliveredintoan8ohmload.

8.VERTICAL OUTPUT STAGE WITHTDA8351/8356
TheTDA8351/8356 verticaldeflectioncircuitcanbeused in90°and110°deflectionsystems with fieldfrequenciesfrom
50upto 1201-fz. With itsbridgeconfiguration the deflection outputcan be DCcoupled with few externalcomponents.
Onlya singlesupplyvoltage forthescan anda second supplyfortheflybackare needed.TheTDA8356 isintendedfor 90°
systemsandtheTDA8351 isintendedfor110°systems.
Thedrivevoltage isamplifiedbyanamplifierandfed to two amplifiers,oneisinvertingandthe otherisa noninvertingamplifier.
Theoutputs (pins7 and4) areconnected to theseries connectionofthevertical deflectioncoilandfeedback resistor Rsense
(R702//R703). Thevoltage acrossRsense isfed viapin9 to correctionamplifier,to obtaina deflection current which isproportional
to the drivevoltage.Thesupplyvoltageforthe TDA8351/8356 is15VDC atpin3.The supplyvoltagegenerator hasa separate
supply voltage of45VDC atpin6.
9.VIDEO OUTPUT AMPLIFIER TDA6107Q
The TDA6107Q consists ofthreemonolithicvideooutputamplifiers.Theamplifiercanbeseenasanoperationalamplifier
with negativefeedback.
Theadvantage of negativefeedback isthat the amplifiercharacteristicsdonotplayanimportantroleupto certainfrequencies.
The internalflash diodesprotectthe amplifiers againstflashover inthepicturetube.
Theonly protections requiredatthe cathode outputsarea flash resistorand a sparkgap.
TheTDA6107Qhas aninternalthermalprotection circuitwhich givesa decreaseoftheslew rateathightemperatures.
Furthermore,the deviceneedsonlyone powersupplyvoltage(Vdd).
Incontrastto previous types ofDMOSvideoamplifiers,allthe external resistors(Rf, RiandRa) areintegrated,sothe gainisfixed
andsaves 9 resistors.
Furthermore,thereference voltage isintegrated,itsaves a resistordivideranda decouplingcapacitor.So,thereplacement
valueofthe TDA6107Q isvery high.
The TDA6107Qisprovidedwith a blackcurrent datapin.SinceTDA884X isusedasdrivedevice,noadjustmentsarerequired
for gainandblacksetting,asthe TDA884X hasPCwhitepointadjustmentandblackcurrentset-up.
10.SINGLE/MULTISTANDARDVIF/SIF-PLLandFM-PLUAM
DEMODULATOR TDA9818
The TDA9818is an1CformultistandardvisionIFsignalprocessing, soundAM andFMdemodulation.
ItisagaincontrolledwidebandVIF-amplifier (AC-coupled). Itisapplicable(orIPfrequenciesof38.9MHz,45.75MHzand58.75MHz.
Truesynchronous demodulationisprovidedwithactivecarrierregeneration.Ithasa VCO frequencywhich canbeswrtchable
between L andL accent (alignmentexternal)picturecarrierfrequency.
The TDA9818 hasa SIF inputfor singlereference QSS mode(PLLcontrolled). SIFAGC detectoristo providegaincontrolled
SIFamplifier.TheAM demodulator iswithoutextra reference circuit.Thesupplyvoltageis+5VDC atpin21.
11.COMBFILTERSAA4961
The SAA 4961 isa one-chip, PAL/NTSCcombfilter 1Cwithinternaldelaylines,filters,clockcontrol,synchronisationand
signalswitches. The combfilterfunction isrealisedina switched capacitortechnique, so ithastime discrete butamplitude
continuous processing.
TheY/CVBS inputisfirst clampedand thenfed to the delay-lineandcombfiltersection viaa lowpasspre-filter
Thisfiltercan bebypassed viathe external LPF-on pin.Thispinisinternallypulledup,to putthefilterdefault on.The Y/CVBs
inputisalsofed tothe sync seperator, where horizontalandvertical reference pulses are made.
Bypassmodecan beforced viaBYP (pin3).FSC (pin1)isthesubcarrierinputwhichisconnected to thecolour decoder.
InputFSCSW pinindicates iffsc or2*fsc isused.
The Sys1,2pins(20,23)indicatewhich system standard isprocessed.Sys2isinternallypulledup,Sys1 isinternallypulleddown.
Therefore when the Sys1,2inputsare left open, automatically PAL 4.43MHzisforced.
SAA4961outputpin15"CVBS"can beusedforparallel-syncedteletextdecoders,toguaranteethattheteletextdisplayalways
hasa correct timingrelation withthemainpicture.Combfilterisdisabledbysetting SAA4961 pin3 "BYP"high.
12.POWER SUPPLY (SMPS)
TheDCvoltages required atvariouspartsofthechassisare provided byanSMPS transformercontrolledbythe 1CMC44604
which is designed (or driving,controllingand protecting switchingtransistor of SMPS. Thetransformer produces 150/115V for
FBTinput,±14Vforaudiooutput1C,S+5V for microcontroller, +15Vfor verticaloutput(fieldscan)and+33Vfortunerandsome
other ICsandtransistors.
13.MICROCONTROLLER SDA525X
Thedevice isTV TEXT tuning and control system basedontheSDA 525XTVTEXT microcontroller.Itisdesignedfor a low
costmonoTV-SETwith analogue pictureandsoundcontrol. Neverthlessthe system offers anonscreendisplay(OSD) and
IRremote control ofallfunctions.
SDA525X hasthefollowing features:
-Display ofprogram number,channel number,TVstandard,analoguevalues,sleeptimer,parentalcontrol, andmuteisdonebyOSD.
-SingleLEDforIRactive, standbyandon modeindication.
-1Controllineto selectexternal source.
-3 Control linesforTV standardselection.
-Frequencysynthesis tuning(62.5 kHzsteps)
-192steptinetuning
-Channelscorresponding to standardsB/G,OIRT,L andI (l+)
-Mono soundcontrol byanaloguevoltage
-Systemconfigurationwithservicemode
14.SERIAL ACCESS CMOS 8K(1024*8)EEPROM ST24C08
The ST24C08 isa 8Kbitelectricallyerasableprogrammablememory (EEPROM), organisedas4 blocks of256'8 bits.
The memory iscompatiblewith the PCstandard,two wire serial interface whichusesa bi-directionaldata bus andserialclock.
The memory carries a built-in 4 bit,unique device identificationcode (1010) corresponding to the PC busdefinition.
Thisisusedtogetherwith 1 chipenableinput(E)so thatupto 2*8KdevicesmaybeattachedtotheK;busandselectedindividually.

15. CLASS AB STEREO HEADPHONE DRIVER TDA1308
The TDA1308isanintegrated class AB stereo headphonedrivercontainedina DIPSplasticpackage.
Thedevice isfabricated ina 1 mmCMOSprocessandhasbeenprimarilydeveloped for portabledigitalaudioapplications.
16.SAWFILTERS
Saw filter type Model:
G1965MPAL-SECAM B/GMONO
G3962M PAL-SECAM B/GGER&NIC STEREO,PALI'NICSTEREO,INT.1
G1984PAL-SECAM B/GGER&NIC STEREO INT-2
J1951MPAL-IMONO
J3950M PAL-I NICSTEREO
J1956MPAL-I'MONO
K2955M PAL-SECAM B/G-D/KMONO,PAL-SECAMB/G-D/K-I',MONO,PAL-SECAMB/G-D/K-LMONO
K2958M PAL-SECAM B/G-D/K (38)MONO
K2962M PAL-SECAM B/G-LA' MONO
G3957M PAL-SECAM B/G-L/L'GER&NIC BQ/LSTEREO
K6256KPAL-SECAM B/G-D/K-l-L/L MONO, PAL-SECAM B/G-D/K-I,L/L'GER&NICBG/LSTEREO,
PAL-SECAM B/G-D/K-l-L/L I,NICAM STEREO, PAL-SECAM B/G-D/K-I-IA'GER&NICI'-B/G-L,STEREO
K6259K PAL-SECAM B/G-D/K-I-M/N (EURO) MONO
M1963M PALM/NMONO,NTSCM MONO,PALM/N-NTSCM MONO
17.BTSC STEREO/SAP/DBX-DECODER andAUDIO PROCESSOR TDA9855
The TDA9855 isa BTSC stereo/SAP/dbx decoderandaudioprocessor.Itperformsallfunctionsto transform the compositebaseband
signalintothe appropriateaudiooutputsignalsto lineoutandto theloudspeakeroutputstages.
1CDESCRIPTIONS AND INTERNAL BLOCK DIAGRAM
TDA8840/8842/8844
TUNER (UV1315,UV1316,UV1336)
TEA6415C
TDA9830
TDA2614/2615/2616Q
TDA8351/8356
TDA6107Q
SAA4961
MC44604
SDA525X
TDA9875
TDA9818
ST24C08
TDA1308
G1965M
TDA9855
TDA8840/8842/8844:
The TDA884X islyC-bus controlledsinglechipTV processorwhichisintendedto beappliedinPAL,NTSC,PAL/NTSCand
multi-standard television receivers. These 1C's arenearly pincompatiblewiththe TDA837X TV processors buthavea higher
degreeof integration because the delayline(TDA4665 function) andtheSECAM decoderhavebeenintegrated.Inadditionto
these functions some additionalfeatures havebeenaddedlike"Continuous Cathode Calibration"(2-point blackcurrent loop
which resultsinanaccurate biasingofthe3 guns),adjustableluminancedelaytime,bluestretching anddynamicskintone control.
Features:
Vision IFcircuitwithPLLdemodulator
Alignment-free multi-standard FMsounddemodulator (4.5MHzto6.5MHz)
Audio switch
Flexible source selection withCVBS switch andY(CVBS)/C inputso thata combfiltercanbeapplied
Integrated chrominance trapcircuit
Integrated luminance delay line
Asymmetrical peaking inthe luminancechannel with a noise coringfunction
Blackstretching ofnon-standard CVBS orluminancesignals
Integratedchroma band-pass filterwith switchable center frequency
Bluestretchcircuitwhichoffsetscolours near whitetowards blue
RGBcontrolcircuitwith"Continuous Cathode Calibration" and white point adjustment
LinearRGBinputsand fast blanking
Possibilityto inserta "blue black" option when no video signal is available
Horizontalsynchronisationwithtwo control loops and alignment-free horizontal oscillator
Verticalcount-down circuit
VerticaldriveroptimisedforDC-coupled vertical output stages
I•'C-buscontrolofvarious functions
Low dissipation(850 mW)
FunctionalDifferences betweenthe 8840/8842/8844:

1CVERSION (TDA) 884088428844
Multi-standardIFXX
AutomaticVolume LimitingX X
PALDecoderXXX
SECAM Decoder X X
NTSCDecoderX X
DynamicSkinControlX
Colour Matrix PAL/NTSC(Japan)X X
ColourMatrixNTSCJapan/USA
YUV interface X
Base-banddelaylineXXX
Adjustable luminancedelaytimeX
Horizontalgeometry X
Horizontalandvertical zoom X
VerticalscrollX
PINNINGPINVALUE
1.Sound IFinput: ImVrms
2.External audioinput: SOOrnVrms
3.IFdemodulatortunedcircuit1
4.IFdemodulatortunedcircuit2
5.IF-PLLloopfilter Min:32-Max:60MHz
6.IFvideooutput4.7V (Negative Modulation),2V (PositiveModulation)
7.Serial clock inputLowlevelmax."!.5V,Highlevelmin3.5V
8.Serialdatainput/outputLowlevel max:1.5 V,Highlevelmin3.5V
9.Bandgapdecoupling
10.Chrominance input(S-VHS) 1Vpp,Max:1.4Vpp
11.External CVBS/Y input1Vpp,Max:1.4Vpp
12.Mainsupplyvoltage 1 8V,Min:7.2V,Max:8.8V
13.Internal CVBS input1Vpp,Max:1.4Vpp
14. Ground 1
15.Audio output700mVrms,Min:500mVrms,Max:900mVrms
16.SECAMPLLdecoupling
17.External CVBS inputVpp, Max:1.4Vpp
18.Black-currentinputAmplitudeof"low"referencecurrent: 8mA
Amplitude of "high"reference current : 20mA
19. Blueoutput2Vpp
20.Green output2Vpp
21.Red output2Vpp
22. Beamcurrentlimiterinput/V-guardinput
23.Red inputforinsertion0.7Vpp,Max:0.8Vpp
24.Green inputforinsertion0.7Vpp,Max:0.8Vpp
25. Blueinputtorinsertion0.7Vpp,Max:0.8Vpp
26. RGB insertion inputMax:0.3V
27.Luminanceinput1.4Vpp
28.Luminanceoutput1 -4Vpp
29.(B-Y) signaloutput1.05Vpp
30.(R-Y) signaloutput1.05Vpp
31.(B-Y) signal input1.05Vpp
32.(R-Y)signalinput1.05Vpp
33.Subcarrier reference output3.58/4.43MHz
34.3.58MHzcrystalconnection
35.4.43/3.58 MHzcrystal connection
36.Loopfilterphasedetector
37.2nd supplyvoltage 1 8V,Min:7.2V,Max:8.8V
38.CVBS output1 Vpp,Max:1.4Vpp
39.Decouplingdigitalsupply1.8V
40.HorizontaloutputMax:0.3V
41.Flyback input/sandcastleoutputMin:100ma, Max:300mA
42.Phase-2 filter 150ms/ms
43.Phase-1 filter±0.9kHz,Max:±1.2kHz
44.Ground2
45.East-westdriveoutput
46. Vertical drive A output0.95mA
47. Vertical drive B output 0.95mA
48.IFinput1
49.IFinput2
50.EHT/overvoltage protectioninputMin:1.2V, Max: 2.8V
51.Vertical sawtooth capacitor 3Vpp
52. Reference current input3Vpp
53.AGC decouplingcapacitor
54. TunerAGC outputMax:9V(MaximumtunerAGCOutputvoltage),300mV(Outputsaturationvoltage)
55. Audio deemphasis500mVrms
56.Decouplingsounddemodulator
8

UV1315,UV1316,UV1336
General description of UV1315:
The UV1315 tuner belongsto the UV 1300 familiy of tuners, whichare designed to meet a wide range of applications.
Itisa combined VHF, UHFtuner suitablefor CCIR systems B/G,H,L,L',I andI'.Thelow IPoutputimpedancehasbeen
designed for direct drive ofa widevarietyof SAW filterswithsufficientsuppressionof tripletransient.
FeaturesofUV1315:
•Member of the UV1300family smallsized UHF/VHFtuners
•Systems CCIR:B/G, H,L,L',I andI';OIRT:D/K
•Voltage synthesized tuning (VST)
•Off-air channels,S-cable channelsandHyperband
•Standardized mechanicaldimensionsandpinning
•Compact size
PINNING
Gain control voltage(AGC)
Tuningvoltage
Highbandswitch
Midbandswitch
Low band switch
Supplyvoltage
Not connected
Not connected
Not connected
10.Symmetrical IFoutput1
11.Symmetrical IFoutput2
PINVALUE
4.0V,Max:4.5V
5V,Min:4.75V,Max:5.5V
5V,Min:4.75V,Max:5.5V
5V,Min:4.75V,Max:5.5V
5V,Min:4.75V,Max:5.5V
Bandswitching table:
Lowband
Midband
Highband
Pin 3
0V
0V
+5V
Pin 4
0V
+5V
0V
Pin 5
+5V
0V
0V
Generaldescription ofUV1316:
The UV1316tunerbelongstotheUV1300 familyoftuners,whicharedesignedto meetawiderangeofapplications.
Itisa combined VHF,UHFtuner suitablefor CCIRsystems B/G,H,L,L',I andI'.The lowIFoutputimpedancehasbeendesigned
for directdriveofa wide varietyofSAW filterswithsufficientsuppressionoftripletransient
Features ofUV1316:
•Member oftheUV1300family smallsized UHF/VHFtuners
•Systems CCIR: B/G,H,L,L',I andI';OIRT:D/K
•Digitally controlled(PLL) tuningvia lyC-bus
•Off-air channels, S-cablechannelsandHyperband
•World standardizedmechanicaldimensionsandworld standardpinning
•Compact size
•Compliesto "CENELECEN55020"and"EN55013"
PINNING
1.Gaincontrol voltage (AGC)
2.Tuningvoltage
PC-busaddressselect
PC-bus serialclock
PC-bus serialdata
Not connected
PLLsupplyvoltage
ADCinput
Tuner supplyvoltage
10.Symmetrical IFoutput1
11.SymmetricalIFoutput2
PINVALUE
4.0V,Max:4.5V
Max:5.5V
Min:-0.3V,Max:5.5V
Min:-0.3V,Max:5.5V
5.0V,Min:4.75V,Max:5.5V
33V,Min:30V,Max:35V
Generaldescription of UV1336:
UV1336 series isdeveloped for receptionofchannelsbroadcastinaccordancewiththeM,N standard.Thetuningisavailable
through built-indigitallycontrolledlyCbus(PLL).
Features of UV1336:
Global standard pinning
IntegratedMixer-Oscillator&PLL function
Conforms to CISPR 13,FCC andDOC (Canada)regulations
Low power consumption
Both Phono connectorand'F'connector are available