JVC AV-29FH1BUG User manual

SERVICEMANUAL
COPYRIGHT©2003VICTORCOMPANYOFJAPAN, LIMITED No.YA008
2003/9
COLOURTELEVISION
YA00820039 AV-29FH1BUG,
AV-29FH1SUG
TABLEOFCONTENTS
1PRECAUTION. . .. . . . . . .. . .. . . . .. . . . .. . . . .. . .. .. . . . .. . .. . . . .. . . . . . . . . .. . . .. .. . . . . . . .. . .1-3
2SPECIFICSERVICEINSTRUCTIONS.. . . . .. .. . . . . . . .. . . . .. . .. . . . .. . . . .. . .. .. . . . . . . .. .. . . . . 1-4
3DISASSEMBLY. . . . .. . . . .. . .. .. . . . . . . .. . . . .. . . . .. . . . .. . .. . . . .. . . . .. . . . .. . .. .. . .. . .. .. . 1-5
4ADJUSTMENT. .. . .. . . . .. .. . . . . . . .. . . . .. .. . .. . .. .. . . . .. . . . . . . .. .. . . . .. . .. . . .. . .. . . . . . .1-8
5TROUBLESHOOTING. . .. . .. . . . .. .. . . . . . . .. . . . .. . . . .. . .. . . . . . .. . . . . . . .. . . . . . . .. .. . .. . .1-12

1-2(No.YA008)
SPECIFICATION
Design&specificationsaresubject tochangewithoutnotice.
Items Contents
AV-29FH1BUGAV-29FH1SUG
Dimensions( W IH ID)81.2cm I60.1cm I52.2cm
Mass40kg
TVRFSystemCCIR(B/G,D/K, I ,L/L')
ColourSystemPAL/SECAM/ NTSC(OnlyinEXTmode)
StereoSystemA2(B/G,D/K) /NICAM(B/G, I, D/K,L)
TeletextSystemFastext (UK system)
TOP(Germansystem)
WST(Worldstandardsystem)
Receiving
Frequency VHF47MHz~470MHz
UHF470MHz~862MHz
FrenchCATV116MHz~172MHz/ 220MHz~469MHz
Intermediate
Frequency VIFCarrier38.9MHz(B/G, D/K,I , L)/ 33.95MHz(L')
SIFCarrier33.4MHz(5.5MHz:B/G)
/ 32.9MHz(6.0MHz:I)
/ 32.4MHz(6.5MHz:L, D/K)
/ 40.45MHz(6.5MHz:L')
ColourSub
CarrierFrequency PAL4.43MHz
SECAM4.40625MHz/ 4.25MHz
NTSC3.58MHz/ 4.43MHz
Power InputAC220V~AC240V,50Hz
Power Consumption84W,standby: 3W
Aerial Input Terminal75 unbalanced, coaxial
PictureTubeVisiblesize: 68cm(Measureddiagonally)
AudioPower Output7W+7W
EXT-1/ EXT-2(Input / Output) 21-pinEuroconnector (SCARTsocket I2)
EXT-3(Input) Video1V(p-p)75 (RCApinjack I1)
Audio(L/R)500mV(rms)(-4dBs),Highimpedance(RCApinjackI2)
HeadphoneJackStereominijack( 3.5mm) I1
RemoteControlUnitRM-C1514B(AAA/R03drybattery I2)RM-C1514(AAA/R03 drybattery I2)

(No.YA008)1-3
SECTION1
PRECAUTION
1.1SAFETYPRECAUTIONS
(1)Thedesignofthisproductcontainsspecialhardware,
manycircuitsandcomponentsspeciallyforsafety
purposes.Forcontinuedprotection,nochangesshouldbe
madetotheoriginal design unlessauthorizedinwriting by
themanufacturer. Replacementpartsmustbeidenticalto
thoseusedintheoriginalcircuits.Serviceshouldbe
performedbyqualified personnel only.
(2)Alterations of the designor circuitryof theproductsshould
notbemade.Anydesign alterationsoradditions willvoid
themanufacturer'swarrantyandwill furtherrelieve the
manufacturerofresponsibilityforpersonalinjuryor
propertydamageresultingtherefrom.
(3)Manyelectrical and mechanical partsintheproductshave
specialsafety-related characteristics.These
characteristicsareoftennot evidentfromvisual inspection
norcantheprotection affordedbythemnecessarilybe
obtainedbyusingreplacementcomponentsratedfor
highervoltage,wattage,etc.Replacementpartswhich
havethesespecialsafetycharacteristicsareidentified in
thepartslistofServicemanual. Electricalcomponents
havingsuchfeatures areidentifiedbyshadingon the
schematicsandby()onthe partslistinService
manual.Theuseofasubstitutereplacementwhichdoes
nothave thesamesafetycharacteristicsasthe
recommendedreplacementpartshowninthepartslistof
Servicemanual maycauseshock, fire, orotherhazards.
(4) Don'tshort betweenthe LIVEsidegroundand
ISOLATED(NEUTRAL)sidegroundorEARTHside
groundwhenrepairing.
Somemodel'spowercircuitispartlydifferentintheGND.
ThedifferenceoftheGNDisshownby theLIVE:()side
GND,the ISOLATED (NEUTRAL):()sideGNDand
EARTH: ( ) sideGND.
Don'tshortbetweentheLIVEsideGNDand ISOLATED
(NEUTRAL)sideGNDorEARTHsideGNDandnever
measurethe LIVEsideGND and ISOLATED(NEUTRAL)
sideGNDorEARTHsideGND atthesametimewitha
measuringapparatus(oscilloscopeetc.). If above notewill
not bekept, afuseor any partswill bebroken.
(5)If anyrepairhas beenmadetothechassis,it is
recommendedthatthe B1settingshouldbe checkedor
adjusted(SeeB1POWERSUPPLYcheck).
(6)Thehighvoltageapplied tothepicturetubemustconform
withthatspecifiedinServicemanual. Excessive high
voltage cancausean increase inX-Rayemission,arcing
andpossiblecomponentdamage,thereforeoperation
underexcessivehighvoltageconditionsshouldbekept to
aminimum,orshouldbeprevented.Ifseverearcing
occurs,removetheACpowerimmediatelyand determine
thecause by visualinspection (incorrectinstallation,
crackedormelted highvoltageharness,poorsoldering,
etc.).To maintainthe properminimumlevelofsoftX-Ray
emission,componentsinthe highvoltagecircuitry
includingthepicturetube mustbetheexact replacements
oralternativesapprovedby themanufacturerofthe
completeproduct.
(7)Donotcheckhighvoltageby drawinganarc.Use ahigh
voltage meterorahighvoltage probewithaVTVM.
Dischargethepicturetubebeforeattemptingmeter
connection,byconnectingaclipleadtothe ground frame
andconnectingtheotherendofthelead througha10k
2Wresistor totheanode button.
(8)Whenservice isrequired,observetheoriginalleaddress.
Extraprecautionshouldbe giventoassurecorrectlead
dressinthehighvoltage circuit area. Whereashort circuit
hasoccurred,thosecomponentsthat indicateevidenceof
overheatingshouldbereplaced.Alwaysusethe
manufacturer'sreplacementcomponents.
(9) IsolationCheck (SafetyforElectrical Shock Hazard)
Afterre-assemblingthe product, alwaysperforman
isolationcheckontheexposedmetalpartsofthecabinet
(antennaterminals,video/audioinputand outputterminals,
Control knobs,metalcabinet,screwheads,earphonejack,
controlshafts,etc.)tobesuretheproductissafetooperate
without dangerofelectrical shock.
a) DielectricStrengthTest
Theisolationbetween theACprimarycircuitandallmetal
partsexposedtotheuser, particularlyanyexposedmetal
part having areturnpathtothe chassisshouldwithstand a
voltage of 3000VAC(r.m.s.) for aperiod of one second. (.
...Withstandavoltageof1100VAC(r.m.s.)toan
appliancerated upto120V,and3000VAC (r.m.s.)toan
appliancerated200Vormore,foraperiodofone second.)
Thismethodoftestrequiresatestequipmentnotgenerally
foundintheservicetrade.
b) LeakageCurrent Check
PlugtheAClinecorddirectlyintotheACoutlet(donotuse
alineisolationtransformerduringthischeck.).Usinga
"LeakageCurrentTester",measurethe leakage current
fromeachexposedmetalpartofthecabinet, particularly
anyexposedmetalpart havingareturnpathtothe chassis,
toaknowngoodearthground (waterpipe,etc.). Any
leakagecurrent mustnot exceed 0.5mAAC(r.m.s.).
However, intropical area,thismustnotexceed0.2mAAC
(r.m.s.).
AlternateCheckMethod
PlugtheACline corddirectlyintothe ACoutlet(donot
usealineisolationtransformerduring thischeck.).Use
anACvoltmeterhaving1000 pervolt ormore
sensitivityinthefollowingmanner.Connecta1500
10Wresistorparalleledbya0.15kFAC-typecapacitor
betweenanexposedmetalpart andaknowngoodearth
ground (waterpipe,etc.). MeasuretheACvoltage
across the resistorwiththe ACvoltmeter. Movethe
resistorconnectiontoeachexposedmetalpart,
particularlyanyexposedmetalpart havingareturnpath
tothechassis,andmeasuretheAC voltage acrossthe
resistor.Now,reversetheplugintheACoutletand
repeat eachmeasurement. Anyvoltagemeasured must
notexceed0.75VAC(r.m.s.). Thiscorrespondsto
0.5mAAC(r.m.s.).
However, intropicalarea,thismustnotexceed0.3VAC
(r.m.s.). Thiscorrespondsto0.2mAAC(r.m.s.).
ACVOLTMETER
(HAVING1000/V,
ORMORE SENSITIVITY)
PLACETHIS PROBE
ONEACH EXPOSED
METALPART
150010W
0.15FAC-TYPE
GOODEARTHGROUND

1-4(No.YA008)
SECTION2
SPECIFICSERVICEINSTRUCTIONS
2.121-pinEuroconnector(SCART) :EXT-1/EXT-2
(P-P=PeaktoPeak, B-W=Blankingtowhitepeak)
PinNo.Signal designationMatching valueEXT-1EXT-2
1AUDIORoutput500mV(rms)(Nominal), LowimpedanceUsed(TVOUT)Used(LINEOUT)
2AUDIORinput500mV(rms)(Nominal), HighimpedanceUsed(R1)Used(R2)
3AUDIOLoutput500mV(rms)(Nominal), LowimpedanceUsed (TVOUT)Used(LINEOUT)
4AUDIOGND---UsedUsed
5GND(B)---UsedUsed
6AUDIOLinput500mV(rms)(Nominal), HighimpedanceUsed(L1)Used(L2)
7Binput700mV(B-W), 75 UsedNC
8FUNCTIONSW(SLOWSW)Low: 0V-3V, High: 8V-12V, HighimpedanceUsedNC
9GND(G)---UsedNC
10SCL/T-VLINK---Not usedNC
11Ginput700mV(B-W), 75 UsedNC
12SDA---Not usedNC
13GND(R)---UsedUsed
14GND(YS)---UsedUsed
15R/ CinputR:700mV(B-W), 75
C: 300mV(P-P), 75 Used(R)Used(C)
16Ysinput(FASTSW)Low:0V-0.4V, High: 1V-3V,75 UsedNC
17GND (VIDEOoutput)---UsedUsed
18GND(VIDEOinput)---UsedUsed
19VIDEOoutput1V(P-P) (Negativesync), 75 Used(TVOUT)Used(LINEOUT)
20VIDEO/Yinput1V(P-P) (Negativesync), 75 UsedUsed
21COMMONGND---UsedUsed
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(No.YA008)1-5
SECTION3
DISASSEMBLY
3.1DISASSEMBLYPROCEDURE
3.1.1REMOVINGTHEREARCOVER
(1)Unplugthe powercord.
(2)Removethe8screws [A].
(3)Removethe1screw [B].
(4)WithdrawtheREARCOVERtowardyou.
3.1.2REMOVINGTHESIDESPEAKER
•RemovetheREARCOVER.
(1)Removethe4screws [D], attachingthe SPEAKER.
(2)Followthesamesteps whenremoving theotherhand
SPEAKER.
3.1.3REMOVINGTHEPFCFILTERPWB
•RemovetheREARCOVER.
(1)Removethe2screws [C] asshowninthefigure.
(2)Take off the2connectorslinkingchassistoPFCFILTER
PWBandwithdrawthe PFCFILTERPWB.
3.1.4REMOVINGTHEMAINPWB
•RemovetheREARCOVER.
(1)Slightlyraisethebothsidesof theMAINPWBbyhandand
withdrawtheMAINPWBbackward.
(Ifnecessary,takeoff thewireclamp, connectorsetc.)
3.1.5CHECKINGTHEPWBOARD
•Tocheckthebacksideof the PWBoard.
(1)Pull outtheMAINPWB. (Refer toREMOVINGTHEMAIN
PWB).
(2)ErecttheMAINPWBverticallysothatyoucaneasilycheck
thebackside ofthePWBoard.
3.1.6CAUTION
•Whenerecting the MAINPWB, becarefulsothat therewill be
nocontactingwithother PWBoard.
•Beforeturning on power, makesurethat the wireconnectoris
properlyconnected.
•Whenconductingacheckwithpowersupplied,be suretocon-
firmthattheCRTEARTHWIRE(BRAIDEDASS'Y)isconnect-
edtotheCRTSOCKETPWboard.
3.1.7WIRECLAMPINGANDCABLETYING
(1)Besuretoclampthewire.
(2)Neverremovethecabletieused fortyingthewires
together.
Shouldit beinadvertentlyremoved,besuretotiethe wires
withanewcabletie.
SPEAKER
CRTSOCKET
PWB
MAINPWB
PFCFILTER
PWB
FBT POWERCORD
FRONTCABINET
REARCOVER
SPEAKER
A
B
D
D
C

1-6(No.YA008)
3.2REPLACEMENTOFMEMORYIC
3.2.1MEMORYIC
ThisTVusememoryIC. InthememoryIC, therearememorizeddatafor correctlyoperatingthe videoanddeflectioncircuits.When
replacingmemoryICwithablankingmemoryIC, the setisautomaticallymemorizedfollowing SERVICEMANUinitialdata.
3.2.2SERVICEMENU ADJUSTMENTITEMS
Thereare21SERVICEADJUSTMENTITEMS.Afterreplacing
memoryIC, automaticallymemorizedfollowinginitial data.
3.2.3FACTORYSETTING
3.2.3.1FRONTBUTTONSETTINGANDINITIALSEETING
3.2.3.2USERMENUSETTING
No.Adjustment item
1HORCEN
2REDGAIN
3GRNGAIN
4BLUEGAIN
5REDBIAS
6GRNBIAS
7AGCLEVEL
8G2-SCREEN
9AFT
10OPTION1
11OPTION2
12AVL
13PARABOLA
14HORWIDTH
15CORNERT
16CORNERB
17HORPARAL
18V. LINEAR
19EWTRAPEZ
20SCORRECT
21VERTCENT
22VERTSIZE
23SHIPPING
ItemValue
MAINPOWEROFF(SUBPOWERON)
PRPOSITION01
INPUTMODETV
ItemValue
PICTURE
BRIGHTNESSCenter
CONTRASTCenter
COLOURCenter
SHARPNESSCenter
TINTCenter
NOISERED.WEAK
SOUND
VOLUME18
BALANCECenter
BASSCenter
TREBLECenter
FEATURES
CHILDLOCKOFF
WAKETIMEOFF
WAKEPROG.01
CLOCK--:--
CLOCKPROG01
PROG.INFOON
ZOOMAUTO4:3
LANGUAGEGB
INSTALL
ATSSOthers
EDIT
SYSTEMEURO
CHANNELC02
FREQUENCY048. 25
NAME-------
PROGRAM01
STORE TO01

(No.YA008)1-7
3.3REPLACEMENTOFCHIPCOMPONENT
3.3.1CAUTIONS
(1)Avoidheatingfor morethan3seconds.
(2)Donot rub the electrodesandthe resistpartsof thepattern.
(3)Whenremovingachippart, meltthesolderadequately.
(4)Donot reuseachippartafterremovingit.
3.3.2SOLDERINGIRON
(1)Useahigh insulationsolderingiron withathinpointed endofit.
(2)A30wsolderingiron isrecommendedforeasilyremovingparts.
3.3.3REPLACEMENTSTEPS
1.Howtoremove Chipparts
[Resistors, capacitors, etc.]
(1)Asshowninthe figure,pushthepart withtweezersand
alternatelymelt the solderateachend.
(2)Shift withthetweezersandremove the chippart.
[Transistors, diodes,variableresistors, etc.]
(1)Applyextrasoldertoeachlead.
(2)Asshowninthe figure,pushthepart withtweezersand
alternatelymeltthesolderateachlead.Shift andremove
thechippart.
NOTE:
Afterremovingthepart,removeremainingsolderfromthe
pattern.
2.Howtoinstall Chipparts
[Resistors, capacitors, etc.]
(1)Applysoldertothepatternas indicatedinthefigure.
(2)Graspthechippartwithtweezersandplaceitonthe
solder. Thenheatand meltthesolderatbothendsofthe
chippart.
[Transistors, diodes,variableresistors, etc.]
(1)Applysoldertothepatternas indicated inthe figure.
(2)Graspthechippartwithtweezersandplaceitonthe
solder.
(3)Firstsolderlead Aasindicatedinthefigure.
(4)Then solderleads Band C.
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1-8(No.YA008)
SECTION4
ADJUSTMENT
4.1ADJUSTMENTPREPARATION
(1)Thereare2waysofadjustingthisTV:OneiswiththeREMOTECONTROLUNITand theotheristheconventionalmethod
usingadjustmentpartsandcomponents.
(2)Makesurethat connection iscorrectlymade ACtoACpower source.
(3)Turnon thepoweroftheTVand measuringinstrumentsfor warningupfor at least30 minutesbeforestartingadjustments.
(4)If thereceiveor input signal isnot specified, use the most appropriatesignal foradjustment.
(5)Nevertouchtheparts(suchasvariableresistors,transformersandcondensers)notshownintheadjustmentitemsofthisservice
adjustment.
4.2MEASURINGINSTRUMENTANDFIXTURES
(1)DCvoltmeter (ordigital voltmeter)
(2)Signal generator (Patterngenerator :PAL/SECAM/ NTSC)
(3)Remotecontrol unit.
4.3BASICOPERATIONOFSERVICE MENU
4.3.1TOOLOFSERVICEMENUOPERATION
OperatetheSERVICEMENU withthe REMOTE CONTROLUNIT.
4.3.2SERVICEADJUSTMENTITEMS
Thereare23adjustment items.
4.3.3HOWTOENTERSERVICEMENU
(1)Press[i](Information)keyand[](Muting)keysametime
then enterSERVICEMENU.
(2)Adjust sharpnesstominimumandexitallmenus.
(3)Within2secondspressthekeysequence[RED]-[GREEN]-
[MENU]key.
4.3.4SELECTIONOFMENUSCREEN
(1)Press[ ]/[ ]keysoftheREMOTECONTROLUNITand
select adjustmentitem.
4.3.5SETTINGVALUEOFADJUSTMENTITEMS
(1)Press[ ]/[ ]keysoftheREMOTECONTROLUNITand
settingvalueof adjustment items.
4.3.6HOWTOEXITSERVICEMENU
(1)Press[MENU]key, thenexitSERVICEMENU.
No.AdjustmentitemNo.Adjustment item
1HORCEN13PARABOLA
2REDGAIN14HORWIDTH
3GRN GAIN15CORNER T
4BLUEGAIN16CORNERB
5REDBIAS17HORPARAL
6GRN BIAS18V. LINEAR
7AGCLEVEL19EWTRAPEZ
8G2-SCREEN20SCORRECT
9AFT21VERTCENT
10OPTION122VERTSIZE
11OPTION223SHIPPING
12AVL
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(No.YA008)1-9
4.4ADJUSTMENTPROCEDURE
4.4.1LOCALOSCILLATORADJUSTMENT
4.4.2AGC
4.4.3FOCUSADJUSTMENT
Item Measuring
instrument TestpointAdjustmentpartDescription
AFT
adjustment Signal generator
Remote
controlunit
AFT
AFT coil : (L150)
[MAINPWB]
(1)Receiveacolourbarpatternsignal.
(2)Thefrequency ofthesignal carriermustbeaccurate
(Max+/-10kHzdeviationfromthenominalchannel
frequency).
(3)Select <AFT>.
(4)AdjusttheAFTcoil (L150)tobringthecursortocen-
tral poison.
Item Measuring
instrument TestpointAdjustmentpartDescription
AGC
adjustment Signal generator
Remote
controlunit
AGC(1)Receiveacolourbar patternsignal.
(2)Select <AGC>.
(3)Pressthe[OK] keyandwait until AGClevelstabilize
totheoptimumvalue.
Item Measuring
instrument TestpointAdjustmentpartDescription
FOCUS
adjustment Signal generator
Remote
controlunit
FOCUSVR
[OnFBT] (1)Receiveacross-hatchsignal. (2)Adjustthe FOCUSvolumeontheFBTtohave the
best resolutiononthescreen.
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I502
I501
I601
L150
I101
I702 TUNER
FBT
MAINPWB
FOCUS
FBT
SCREEN

1-10(No.YA008)
4.4.4SCREENADJUSTMENT
4.4.5WHITEBALANCEADJUSTMENT
4.4.6DEFLECTIONCIRCUITADJUSTMENT
Item Measuring
instrument TestpointAdjustmentpartDescription
SCREEN
adjustment Signal generator
Remote
control unit
G2-SCREEN
SCREENVR
[OnFBT]
(1)Receive acolour barpatternsignal.
(2)Select <G2-SCREEN>.
(3)AdjusttheSCREENVRontheFBTtobringthe
cursortocentralposition.
Item Measuring
instrument TestpointAdjustmentpartDescription
WHITE
BALANCE
adjustment
Signal
generator
Remote
control unit
REDBIAS
GRNBIAS
REDGAIN
GRNGAIN
BLUEGAIN
(1)Receive ablackandwhitepatternsignal(colouroff).
(2)Select<REDBIAS>,<GRNBIAS>andadjustthe
screenuntiltheblackportioninthescreen becomes
black.
(3)Select<REDGAIN>, <GRNGAIN>,<BLUEGAIN>
andadjustthescreen untilthewhiteportioninthe
screenbecomewhite.
Item Measuring
instrument TestpointAdjustmentpartDescription
VERTICAL
GEOMETORY
adjustment
Signal
generator
Remote
control unit
V.LINEAR
SCORRECT
VERTSIZE
VERTCENT
(1)Receive acirclepatternsignal.
(2)Select<V.LINEAR>(Vereticallinearity),<S
CORRECT>(Scorrection), <VERTSIZE>(Vertical
size), <VERTCENT>(Vertical center)respectively.
(3)Adjust tocompensatefor verticaldistortion.
HORIZONTAL
POSITION
adjustment
Signal
generator
Remote
control unit
HORCEN(1)Receiveacirclepatternsignal.
(2)Select <HORCEN>(Horizontal center).
(3)Adjusttohavethepictureinthecenterofthescreen.