Hyundai HPT-4205 User manual

42 PLASMA TV
(Built-inTuner)
SERVICEMANUAL

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PlasmaTVServiceManual 14/03/2005
TABLEOFCONTENTS
1. INTRODUCTION......................................................................................................................................1
2. TUNER......................................................................................................................................................1
3. IFPART(TDA9886).................................................................................................................................1
4. MULTI STANDARD SOUND PROCESSOR............................................................................................2
5. VIDEOSWITCH TEA6415.......................................................................................................................2
6. AUDIOAMPLIFIERSTAGEWITHTDA8928...........................................................................................2
7. POWERSUPPLY(SMPS).......................................................................................................................3
8. MICROCONTROLLER.............................................................................................................................3
9. SERIALACCESSCMOS4Kx8(32Kbit)EEPROM24C32A.................................................................3
10.CLASS AB STEREOHEADPHONEDRIVERTDA1308.........................................................................3
11.SAWFILTERS..........................................................................................................................................3
12.ICDESCRIPTIONS..................................................................................................................................4
12.1.MC44608...........................................................................................................................................5
12.2.TCET1102G......................................................................................................................................6
12.3.TDA9886...........................................................................................................................................6
12.4.TEA6415C.........................................................................................................................................7
12.5.SAA3010T.........................................................................................................................................8
12.6.24C32A..............................................................................................................................................9
12.7.SAA5264.........................................................................................................................................10
12.8.LM317..............................................................................................................................................12
12.9.LM393..............................................................................................................................................12
12.10.ST24LC21.......................................................................................................................................13
12.11.TLC7733..........................................................................................................................................13
12.12.74LVC14A.......................................................................................................................................14
12.13.LM1086............................................................................................................................................15
12.14.LM1117............................................................................................................................................16
12.15.DS90C385.......................................................................................................................................16
12.16.TL431..............................................................................................................................................18
12.17.MSP34X0G(MSP3410G)...............................................................................................................18
12.18.TDA8928.........................................................................................................................................21
12.19.TDA1308.........................................................................................................................................22
12.20.PI5V330...........................................................................................................................................22
12.21.AD9883A.........................................................................................................................................22
12.22.SAA7118E.......................................................................................................................................26
12.23.TPS72501........................................................................................................................................31
12.24.TSOP1836.......................................................................................................................................32
12.25.PCF8591.........................................................................................................................................33
12.26.PW1231...........................................................................................................................................33
12.27.PW181.............................................................................................................................................34
12.28.SIL151B...........................................................................................................................................35
12.29.SDRAM 4Mx16 (MT48LC4M16A2TG-75).....................................................................................36
12.30.FLASH8MBit...................................................................................................................................38
13.SERVICEMENU SETTINGS.................................................................................................................39
13.1.displaymenu...................................................................................................................................39
13.2.calibration menu..............................................................................................................................41
13.3.deinterlacermenu............................................................................................................................43
13.4.factory settingsmenu......................................................................................................................45
14.BLOCKDIAGRAMS...............................................................................................................................46
15.CIRCUITDIAGRAMS.............................................................................................................................54

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1.INTRODUCTION
42 PlasmaTVisaprogressiveTVcontrol systemwithbuilt-in de-interlacer and scaler.Itusesa
852*480 panelwith16:9aspect ratio.TheTViscapableof operationin PAL, SECAM,NTSC(playback)
colourstandardsandmultipletransmissionstandardsasB/G,D/K,I/I!,and L/L´including German and
NICAM stereo.Sound systemoutputissupplying 2x10W(10%THD)forstereo 8 speakers.The
chassisisequipped withmanyinputsand outputsallowingittobe usedasacenterofamedia system.
Itsupportsfollowing peripherals:
2SCART sockets
1AVinput(CVBS+Stereo Audio)
1SVHSinput
1StereoHeadphoneoutput
1D-Sub 15PCinput
1DVIinput
1Stereoaudio inputforPC/DVI
1Stereoaudio output
2.TUNER
The tuners used in the design arecombined VHF,UHFtuners suitable forCCIRsystems B/G,H, L,L!,
I/I!,andD/K.Thetuningisavailable through the digitallycontrolledI2 Cbus(PLL).Below you willfind
infoon one oftheTunersin use.
GeneraldescriptionofUV1316:
The UV1316 tunerbelongstothe UV1300 familyof tuners,whicharedesignedtomeetawide range of
applications. It isacombined VHF, UHF tunersuitable forCCIRsystemsB/G,H, L, L!,I and I!.The low
IFoutputimpedancehasbeendesigned fordirectdriveofawide varietyofSAWfilters withsufficient
suppressionoftripletransient.
Features ofUV1316:
1.MemberoftheUV1300 familysmall sized UHF/VHFtuners
2.Systems CCIR:B/G,H,L, L!,Iand I!;OIRT: D/K
3.Digitallycontrolled (PLL)tuningvia I2C-bus
4.Off-airchannels,S-cablechannelsand Hyperband
5.Worldstandardised mechanical dimensionsand world standardpinning
6.Compactsize
7.Compliesto "CENELECEN55020 and "EN55013
Pinning:
1.Gain controlvoltage (AGC):4.0V,Max:4.5V
2.Tuningvoltage
3.I²C-busaddressselect:Max:5.5V
4.I²C-busserial clock :Min:-0.3V,Max:5.5V
5.I²C-busserial data:Min:-0.3V,Max:5.5V
6.Not connected
7.PLL supplyvoltage :5.0V,Min:4.75V,Max:5.5V
8.ADC input
9.Tunersupplyvoltage :33V,Min:30V, Max:35V
10.Symmetrical IFoutput1
11.Symmetrical IFoutput2
3.IFPART(TDA9886)
The TDA9886 isan alignment-free multistandard(PAL,SECAMandNTSC)vision and sound IF signal PLL.
The following figureshowsthe simplified blockdiagramof the integrated circuit.
The integrated circuit comprisesthe following functional blocks:
VIF amplifier,Tunerand VIF-AGC,VIF-AGCdetector,FrequencyPhase-Locked Loop (FPLL)detector,VCO
and divider,Digital acquisition helpand AFC,Video demodulatorand amplifier,Sound carriertrap,SIF
amplifier,SIF-AGCdetector,SinglereferenceQSS mixer,AMdemodulator,FMdemodulatorand acquisition
help,Audio amplifierand mutetimeconstant, I²C-bustransceiversand MAD(module address),Internal
voltage stabilizer.

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4.MULTISTANDARD SOUND PROCESSOR
The MSP34x0Gfamilyofsingle-chipMultistandardSound Processorscovers the sound processingof
allanalogue TV-Standardsworldwide, aswellasthe NICAM digitalsound standards. The full TVsound
processing,startingwithanaloguesound IFsignal-in,down toprocessed analogue AF-out, is
performed on asingle chip.
TheseTVsoundprocessingICsinclude versionsforprocessing the multichannel television sound
(MTS) signalconforming tothestandardrecommended bytheBroadcastTelevision Systems
Committee(BTSC).TheDBX noisereduction,oralternatively,MicronasNoiseReduction (MNR)is
performed alignmentfree.OtherprocessedstandardsaretheJapaneseFM-FMmultiplexstandard
(EIA-J) and the FMStereo Radiostandard.
CurrentICshavetoperform adjustmentproceduresin ordertoachievegoodstereo separation for
BTSCand EIA-J.The MSP 34x1Ghasoptimumstereo performancewithoutanyadjustments.
5.VIDEO SWITCH TEA6415
Incaseofthreeormoreexternalsourcesareused,the video switchICTEA6415 isused.The main
function ofthisdeviceistoswitch8video-inputsourcesonthe 6outputs.
Eachoutputcanbe switched on onlyone ofeachinput.Oneachinputan alignmentofthe lowestlevel
ofthe signalismade (bottomofsync. topforCVBS orblacklevelforRGBsignals).
Eachnominal gain between anyinputandoutputis6.5dB.ForD2MACorChromasignalthe alignment
isswitched off byforcing,withan externalresistorbridge,5VDC on the input.Eachinputcan beused
asanormal inputorasaMACorChromainput(withexternalResistorBridge).Allthe switching
possibilitiesarechanged through the BUS. Driving75ohmload needsan externalresistor.It ispossible
tohavethe sameinputconnected toseveral outputs.
6.AUDIO AMPLIFIERSTAGEWITHTDA8928
The TDA8928 isaswitchingpowerstage forahighefficiency class-Daudiopoweramplifiersystem.
Withthispowerstageacompact 2x10 Wselfoscillatingdigital amplifiersystemcan be built,operating
withhighefficiency and very low dissipation.No heatsinkisrequired.The systemoperatesoverawide
supplyvoltagerangefrom+-7.5Vupto+-30Vand consumesaverylowquiescentcurrent.

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7.POWERSUPPLY(SMPS)
The DC voltagesrequired atvariouspartsofthe chassisareprovidedbyan SMPS transformer
controlled bythe ICMC44608,whichisdesignedfordriving,controlling and protecting switching
transistorofSMPS.Thetransformergenerates145VforFBTinput,+/-14Vforaudio amplifier,5Vand
3.3Vstand byvoltageand8V,12Vand5Vsuppliesforotherdifferentpartsofthe chassis.
Anoptocouplerisusedtocontrolthe regulationofline voltage and stand-bypowerconsumption.There
isaregulation circuitin secondary side.Thiscircuitproducesacontrolvoltageaccording tothe
changesin 145VDC voltage,via an optocoupler(TCET1102G)topin3 oftheIC.
Duringthe switchon period ofthe transistor,energyisstored in the transformer.Duringthe switchoff
period energyisfedtothe loadvia secondarywinding.By varying switch-on timeofthe power
transistor,itcontrolseachportion ofenergytransferred tothe second side suchthattheoutputvoltage
remainsnearlyindependentofload variations.
8.MICROCONTROLLER
The microprocessorisembeddedinside PW181 chip whichalsohandlesscaling, framerateconversion
andOSDgeneration. Theon-chip 16-bit microprocessorisaTurbo x86-compatible processorcorewith
on-chipperipherals(timers,interruptcontroller,2-wireserial master/slaveinterface,UART,I/Oports,
andmore).SpecialperipheralssuchasInfrared (IR)pulsedecoders andadigital pulsewidthmodulator
(PWM) arealsoincluded.Therearetwo independent2-wireserial master/slaveinterfacemodulesthat
can bemultiplexedtocontrolup tofive2-wireserial ports.The slave2-wireinterfaceisdesignedfor
HDCPuseonly(andrequiresthe useofHDCPImage Processors).On-chipRAM ofup to64 Kbytesis
available.Acompletemicroprocessorsystemcan be implemented simplybyaddingexternal ROM.The
on-chipprocessorcan be disabledtoallow external processorcontrolof all internalfunctions.
9.SERIALACCESS CMOS4Kx8(32Kbit) EEPROM24C32A
The Microchip TechnologyInc.24C32Aisa4Kx8(32Kbit)Serial ElectricallyErasable PROM.Ithas
beendevelopedforadvanced,low powerapplicationssuchaspersonal communicationsordata
acquisition.The 24C32Aalsohasapage-writecapabilityofupto32 bytesofdata.The 24C32Ais
capable ofbothrandomand sequential readsuptothe 32Kboundary.Functional address linesallow
up toeight24C32Adeviceson the samebus,forup to256Kbitsaddressspace.AdvancedCMOS
technologyand broadvoltagerange makethisdeviceideal forlow-power/low-voltage, non-volatile code
anddataapplications.
10.CLASS AB STEREO HEADPHONEDRIVERTDA1308
The TDA1308 isan integrated class AB stereo headphone drivercontained inaDIP8plasticpackage.
The deviceisfabricated in a1mmCMOSprocessand hasbeenprimarilydevelopedforportable digital
audio applications.
11.SAWFILTERS
K9656M:
Standard:
$B/G
$D/K
$I
$L/L!
Features
$TVIFaudiofilterwithtwo channels
$Channel 1(L!)withone pass band forsound carriers at40.40MHz(L!)and 39.75 MHz(L!-NICAM)
$Channel 2(B/G,D/K,L, I)withone passband forsoundcarriers between 32.35 MHzand 33.40 MHz
Terminals
$TinnedCuFealloy
Pinconfiguration
1Input
2Switching input
3Chipcarrier-ground
4Output
5Output

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K3953M:
Standard:
$B/G
$D/K
$I
$L/L!
Features
TVIF video filterwithNyquist slopesat 33.90 MHzand 38.90 MHz
Constant groupdelay
Suitable forCENELECEN55020
Terminals
Tinned CuFealloy
Pin configuration
1Input
2Input -ground
3Chipcarrier-ground
4Output
5Output
12.ICDESCRIPTIONS
MC44608
TCET1102G
TDA9886
TEA6415C
SAA3010T
24C32
SAA5264
LM317T
LM393
ST24LC21
TLC7733
74LVC257A
74LVC14A
LM1086
LM1117
DS90C385
TL431
MSP3410G
TDA8928
TDA1308
PI5V330
AD9883A
SAA7118E
TPS72501
TSOP1836
PCF8591
PW1231
PW181
SIL151B
SDRAM 4Mx16 (MT48LC4M16A2TG-75)
FLASH

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12.1.MC44608
12.1.1.Description
The MC44608 isahigh performancevoltage modecontrollerdesignedforoff%lineconverters. Thishigh
voltagecircuitthatintegratesthe start%up currentsourceand the oscillatorcapacitor,requiresfew
external componentswhile offering ahigh flexibilityand reliability.The devicealsofeaturesavery high
efficiency stand%bymanagementconsistingofan effectivePulsed Mode operation.Thistechnique
enablesthe reductionofthe stand%bypowerconsumptiontoapproximately1Wwhiledelivering 300mW
in a150WSMPS.
$Integrated Start%Up CurrentSource
$FastStart%Up
$Lossless Off%Line Start%Up
$DirectOff%Line Operation
12.1.2.GeneralFeatures
$Flexibility
$DutyCycleControl
$UndervoltageLockout withHysteresis
$OnChip OscillatorSwitchingFrequency 40,or75kHz
$SecondaryControl withFew ExternalComponents
Protections
$MaximumDutyCycleLimitation
$Cycle byCycleCurrentLimitation
$Demagnetization(ZeroCurrentDetection)Protection
$"OverVCC Protection AgainstOpenLoop
$Programmable Low Inertia OverVoltage Protection AgainstOpen Loop
$Internal ThermalProtection
GreenLineTM Controller
$PulsedMode TechniquesforaVery HighEfficiency LowPowerMode
$LosslessStartup
$LowdV/dTforLow EMIRadiations
12.1.3.PinConnections
PinNameDescription
1DemagTheDemagpinoffers3differentfunctions: Zerovoltage crossingdetection(50mV),24mAcurrent
detectionand120mAcurrentdetection.The24mAlevelisusedtodetectthesecondary
reconfigurationstatusand the120mAleveltodetectanOverVoltagestatuscalledQuick OVP.
2ISENSETheCurrentSensepinsensesthevoltagedevelopedontheseriesresistorinsertedinthesource
ofthepowerMOSFET.WhenIsensereaches1V,theDriveroutput(pin 5)isdisabled.Thisis
knownastheOverCurrentProtectionfunction.A200mAcurrent sourceisflowingout of thepin3
duringthestart%upphaseandduringthe switchingphaseincaseof thePulsedMode of operation.
Aresistorcanbeinsertedbetweenthesenseresistorandthepin3;thusaprogrammable peak
currentdetectioncanbeperformedduringtheSMPS stand%bymode.
3ControlInputAfeedbackcurrent fromthesecondarysideoftheSMPS via theopto%couplerisinjectedintothis
pin. Aresistorcanbeconnectedbetweenthispin andGND toallowtheprogrammingoftheBurst
dutycycleduringtheStand%bymode.
4GroundThispinisthegroundoftheprimarysideof the SMPS.
5DriverThecurrentandslewratecapabilityofthispinaresuitedtodrivePowerMOSFETs.
6VCC ThispinisthepositivesupplyoftheIC.Thedriveroutputgetsdisabledwhenthevoltagebecomes
higherthan15Vandtheoperatingrangeisbetween6.6Vand13V.Anintermediatevoltagelevel
of 10Vcreatesadisablingcondition calledLatchedOff phase.
7Thispinistoprovideisolationbetween theVipin8andtheVCC pin6.
8ViThispincan bedirectlyconnected toa500Vvoltagesourceforstart%upfunctionoftheIC. During
theStart%upphasea9mAcurrent sourceisinternallydeliveredtotheVCC pin6allowingarapid
chargeof theVCC capacitor. Assoon astheICstarts%up,thiscurrent sourceisdisabled.

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12.2.TCET1102G
12.2.1.Description
The TCET110/TCET2100/TCET4100 consistsofaphototransistoropticallycoupledtoagallium
arsenide infrared-emitting diodeina4-lead upto16-leadplasticdual inlinepackage.The elementsare
mounted on one leadframeusing a coplanartechnique, providing afixed distancebetweeninput and
output forhighestsafetyrequirements.
12.2.2.Applications
Circuitsforsafeprotectiveseparation againstelectricalshockaccordingtosafetyclass II(reinforced
isolation):
Forappl.class I %IVatmainsvoltage 300 V
Forappl.class I %IIIatmainsvoltage 600 V
According toVDE0884,table2,suitable for: Switch-modepower supplies,linereceiver,computer
peripheralinterface,microprocessorsysteminterface.
12.2.3.13.12.3.Features
VDE0884 relatedfeatures:
Rated impulsevoltage (transientovervoltage)V IOTM =8kV peak
Isolation testvoltage (partialdischargetestvoltage)V pd =1.6kV
Rated isolationvoltage(RMS includesDC)V IOWM =600V RMS (848Vpeak)
Rated recurring peakvoltage(repetitive)V IORM =600V RMS
Generalfeatures:
CTRoffered in 9groups
Isolationmaterialsaccording toUL94-VO
Pollution degree 2(DIN/VDE0110/resp.IEC664)
Climaticclassification 55/100/21 (IEC68 part1)
Specialconstruction:Therefore,extralow coupling capacityoftypical0.2pF, high Common Mode
Rejection
LowtemperaturecoefficientofCTR
G=Leadform10.16 mm;providescreepagedistance>8mm,forTCET2100/TCET4100optional;
suffixletter &G!isnot markedon theoptocoupler
Coupling SystemU
12.3.TDA9886
12.3.1.GeneralDescription
The TDA9886isan alignment-free single standard(withoutpositivemodulation)vision and sound IF signal
PLL.
12.3.2.Features
$5Vsupplyvoltage
$Gain controlled wide-band Vision IntermediateFrequency (VIF)amplifier(AC-coupled)
$Multistandardtrue synchronousdemodulation withactivecarrierregeneration(verylineardemodulation,
good intermodulation figures, reduced harmonics, excellent pulseresponse)
$Gated phasedetectorforL/Laccent standard
$Fullyintegrated VIF Voltage Controlled Oscillator(VCO),alignment-free;frequenciesswitchable forall
negativeand positivemodulated standardsvia I2C-bus
$Digital acquisition help, VIF frequenciesof 33.4, 33.9, 38.0, 38.9, 45.75 and 58.75 MHz
$4MHzreferencefrequency input[signal fromPhase-Locked Loop (PLL)tuning system]oroperating as
crystal oscillator
$VIFAutomaticGain Control (AGC)detectorforgain control,operating aspeaksyncdetectorfornegative
modulated signalsand asapeakwhitedetectorforpositivemodulated signals
$PrecisefullydigitalAutomaticFrequencyControl (AFC)detectorwith4-bitdigital-to-analogue converter;
AFCbitsvia I2C-busreadable

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$TakeOverPoint (TOP) adjustable viaI2C-busoralternativelywithpotentiometer
$Fullyintegrated soundcarriertrap for4.5, 5.5, 6.0and 6.5MHz, controlled byFM-PLL oscillator
$Sound IF (SIF)input forsingle referenceQuasiSplit Sound (QSS)mode (PLL controlled)
$SIF AGCforgain controlled SIF amplifier;single referenceQSSmixerabletooperatein high performance
singlereferenceQSSmode and in intercarriermode, switchable via I2C-bus
$AMdemodulatorwithout extrareferencecircuit
$Alignment-free selectiveFM-PLL demodulatorwithhigh linearityandlownoise
$I2C-buscontrol forallfunctions
$I2C-bustransceiverwithpin programmableModule Address(MAD).
12.3.3.Pinning
SYMBOLPINDESCRIPTION
VIF11 VIFdifferential input 1
VIF2 2VIFdifferential input 2
OP1 3output 1(open-collector)
FMPLL 4FM-PLL forloop filter
DEEM 5de-emphasisoutput forcapacitor
AFD 6AFdecoupling input forcapacitor
DGND 7digitalground
AUD 8audio output
TOP 9tunerAGCTakeOverPoint (TOP)
SDA 10 I2C-busdatainput/output
SCL 11 I2C-busclock input
SIOMA 12 sound intercarrieroutput and MADselect
n.c. 13 not connected
TAGC 14 tunerAGCoutput
REF 15 4MHzcrystal orreferenceinput
VAGC 16 VIF-AGCforcapacitor; note1
CVBS 17 video output
AGND 18 analog ground
VPLL 19 VIF-PLL forloop filter
VP20 supplyvoltage (+5V)
AFC 21 AFCoutput
OP2 22 output 2(open-collector)
SIF1 23 SIFdifferential input 1
SIF2 24 SIFdifferential input 2
12.4.TEA6415C
12.4.1.GeneralDescription
The mainfunction ofthe ICistoswitch8video inputsourceson6outputs.Eachoutputcan be
switched on onlyoneof eachinput. Oneachinputan alignmentof thelowestlevel ofthe signalismade
(bottomofsynch.topforCVBS orblack level forRGBsignals).Eachnominalgain between anyinput
andoutputis6.5dB.ForD2MACorChromasignal the alignmentisswitched offbyforcing,withan
external resistorbridge,5VDC on the input.Eachinputcan beused asanormalinputorasaMACor
Chromainput(withexternalresistorbridge).Alltheswitching possibilitiesarechanged through the
BUS.Driving75 load needsan external transistor.Itispossibletohavethe sameinputconnectedto
severaloutputs. The startingconfiguration uponpoweron (powersupply:0to10V)isundetermined. In
thiscase,6wordsof16 bitsarenecessary todetermineone configuration.Inothercase,1wordof16
bitsisnecessary todetermine one configuration.
12.4.2.Features
$20MHzBandwidth
$Cascadable withanotherTEA6415C(Internaladdresscan be changed bypin7voltage)
$8Inputs(CVBS,RGB,MAC,CHROMA,...)
$6Outputs

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$PossibilityofMACorchromasignal foreachinputbyswitching-offtheclampwithan external resistor
bridge
$Buscontrolled
$6.5dBgainbetweenanyinputand output
$55dBcrosstalkat5mHz
$FullyESDprotected
12.4.3.Pinning
1.Input:Max:2Vpp,InputCurrent: 1mA,Max:3mA
2.Data:Low level :-0.3VMax:1.5V,
Highlevel:3.0VMax:Vcc+0.5V
3.Input:Max:2Vpp,InputCurrent:1mA, Max: 3mA
4.Clock :Low level :-0.3VMax:1.5V,
Highlevel:3.0VMax:Vcc+0.5V
5.Input:Max:2Vpp,InputCurrent: 1mA,Max:3mA
6.Input:Max:2Vpp,InputCurrent: 1mA,Max:3mA
7.Prog
8.Input:Max:2Vpp,InputCurrent:1mA,Max:3mA
9.Vcc:12V
10.Input:Max:2Vpp,InputCurrent:1mA,Max:3mA
11.Input:Max:2Vpp,InputCurrent:1mA,Max:3mA
12.Ground
13.Output:5.5Vpp,Min :4.5Vpp
14.Output:5.5Vpp,Min :4.5Vpp
15.Output:5.5Vpp,Min :4.5Vpp
16.Output:5.5Vpp,Min :4.5Vpp
17.Output:5.5Vpp,Min :4.5Vpp
18.Output:5.5Vpp,Min :4.5Vpp
19.Ground
20.Input:Max:2Vpp,InputCurrent:1mA,Max: 3mA
12.5.SAA3010T
12.5.1.Description
The SAA3010isintended asageneral purpose(RC-5)infrared remotecontrol systemforusewherealow
voltage supplyand alarge debouncetimeareexpected.The devicecangenerate2048 differentcommands
and utilizesakeyboardwithasingle pole switchforeachkey.Thecommandsarearranged sothat32
systems can be addressed,eachsystemcontaining 64differentcommands.The circuitresponsetolegal
(one keypressed atatime)and illegal (morethan one keypressed atatime)keyboardoperation isspecified
in the section "Keyboardoperation .
12.5.2.Features
Lowvoltage requirement
Biphasetransmission technique
Single pin oscillator
Test mode facility
12.5.3.Pinning
PinMnemonicFunction
1X7(IPU)senseinput fromkeymatrix
2SSM(I) sense modeselection input
3Z0-Z3(IPU)sense inputsfromkeymatrix
7MDATA (OP3)generated outputdatamodulated with1/12theoscillator frequencyata25%dutyfactor
8DATA(OP3)generatedoutputinformation
9-13DR7-DR3(ODN)Scandrivers
14VSS Ground(0V)
15-17 DR-2-DR0(ODN)Scandrivers
18OSC (I) Oscillator input
19TP2(I) test point2