Toshiba 32A3030D User manual

SERVICE MANUAL
LCDColor Television
32A3030D Ver.2.00
This modelis classified as a green product
(*1), asindicated by the underlined serialnumber.
This Service Manualdescribesreplacementparts forthe green product. When repairing this
green product, use the part(s)described in this manualand lead-free solder (*2).
For(*1)and (*2), referto GREENPRODUCTPROCUREMENT and LEAD-FREE
SOLDER.
©TOSHIBACORPORATION

IMPORTANT NOTICE
WARNING:
You are requestedthat you shall notmodifyor alter theinformation or data
provided hereinwithoutprior writtenconsentby Toshiba.Toshibashall not
be liabletoanybody foranydamages,losses,expensesor costs,if any,
incurredinconnectionwithor asaresultofsuchmodification or alteration.
THEINFORMATIONORDATAHEREINSHALL BEPROVIDED"ASIS"
WITHOUTANYWARRANTYOFANYKIND, EITHEREXPRESSORIMPLIED
WARRANTYOFMERCHANTABILITYANDFITNESS FORAPARTICULAR
PURPOSE.
Toshiba shallnotbe liableforanydamages,losses, expensesor costs,if
any,incurredinconnection withorasaresultof use ofany information or
dataprovided herein.
WARNING

GREEN PRODUCTPROCUREMENT
TheECis actively promoting the WEEE &RoHS Directives thatdefine standardsfor
recycling and reuse ofWaste Electricaland Electronic Equipmentand forthe Restrictionof
the use ofcertain Hazardous Substances. FromJuly 1, 2006, the RoHS Directive will
prohibitany marketing ofnewproducts containing the restricted substances.
Increasing attention is given to issues related to the globalenvironmental. Toshiba
Corporation recognizes environmentalprotection as a keymanagementtasks, andis doing its
utmostto enhance and improve the quality and scope ofits environmentalactivities. In line
with this, Toshiba proactively promotes Green Procurement, and seeks to purchase and use
products,partsand materialsthathave lowenvironmentalimpacts.
Green procurementofpartsis notonly confined to manufacture. The same green parts used
in manufacture mustalso be used as replacementparts.
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GREENPRODUCT PROCUREMENT

LEAD-FREESOLDER
This productis manufactured using lead-free solderas a part ofa movementwithin the
consumerproducts industry atlarge to be environmentally responsible. Lead-
free soldermust
beused in the servicing and repairofthis product.
Themelting temperature oflead-free solderis higherthan thatofleaded solderby 86 F to
104 F (30 Cto 40 C). Use ofa soldering iron designed forlead-based solders to repair
productmade withlead
-
free soldermayresultin damage to the componentand orPCB being
soldered. Greatcareshould be made to ensure high-quality soldering when servicing this
productespecially when soldering large components, through
-hole pins, and on PCBs as the
levelofheatrequired to meltlead-free solderis high.
WARNING: Thisproductismanufacturedusingleadfree solder.
DONOTUSELEADBASEDSOLDERTOREPAIRTHISPRODUCT!
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LEAD
-
FREESOLDER

SAFETY INSTRUCTION
SafetyPrecaution
1.An isolation transformershould be connectedin the powerline between thereceiver
and the ACline before any service is performed on the receiver.
2.Always disconnectthe powerplug before any disassembling ofthe product. Itmay
resultin electricalshock.
3.When replacing a chassis in the cabinet, always be certain thatallthe protective
devices areputback inplace, such as nonmetalliccontrolknobs, insulating covers,
shields, isolation resistor-capacitornetwork, etc.
4.
Always keep tools,components oftheproduct, etc away fromthe children, These items
may cause injury to children.
5.Depending on the model, use anisolation transformerorwearsuitable gloves when
servicing withthe poweron, and disconnectthe powerplugto avoid electricalshock
when replacing parts. In some cases, alternating currentis alsoimpressed in the
chassis, so electricalshock is possible ifthe chassis is contacted with the poweron.
6.Always usethe replacementparts specified forthe particularmodelwhen making
repairs. The parts used in products requirespecialsafetycharacteristicssuch as
WARNING: BEFORESERVICINGTHISCHASSIS,READTHE"SAFETY
PRECAUTION"AND"PRODUCTSAFETYNOTICE"INSTRUCTIONSBELOW.
WARNING: SERVICINGSHOULDNOTBEATTEMPTEDBYANYONE
UNFAMILIARWITHTHENECESSARYPRECAUTIONSONTHISRECEIVER.
THEFOLLOWINGARETHENECESSARYPRECAUTIONSTO BEOBSERVED
BEFORESERVICING THISCHASSIS.
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inflammability, voltageresistance, etc. therefore, use only replacementparts thathave
these same characteristics. Use only the specified parts when the markis indicated
in the circuit diagramorpartslist.
7.Parts mounting and routing dressing ofwirings should be the same as thatused
originally. Forsafety purposes, insulating materials such as isolation tube ortapeare
sometimes used and printed circuitboards are sometimes mounted floating. Also make
sure thatwirings isroutedand clamped to avoid parts thatgenerateheatand which use
high voltage. Always followthe manufactured wiring routes /dressings.
8.Always ensure thatallinternalwirings are in accordance before re-assembling the
externalcasing aftera repairing completed. Do notallowinternalwiring to be pinched
by cabinets, panels, etc. Any errorin reassembly orwiring can resultin electrical
leakage, flame, etc., and may be hazardous.
9.
NEVERremodelthe productin any way. Remodeling can resultin improperoperation,
malfunction, orelectricalleakageand flame, which may be hazardous.
10.Touch currentcheck. (Aftercompleting the work, measure touch currentto preventan
electric shock.)
lPlug the ACcord directly into the ACoutlet. Do NOT use an isolation transformer
forthis check.
lConnecta measuring network fortouch currents between each exposed metallic part
on the setand a good earth ground such as a waterpipe.
Annex D
(normative)
Measuring network for TOUCH CURRENTS
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lThepotentialatany point(TOUCHCURRENT)expressed as voltage and
does notexceed the following value:
Resistance valuesinorms( ).
Input resistance: 1M
Input capacitance: 200 pF
Frequency range: 15 Hzto1MHz andd.c. respectively
Note: Appropriatemeasuresshouldbe takentoobtainthe correct value incase of non
sinusoidal waveforms.
The measuringinstrument iscalibrated by comparing the frequencyfactorof withthe
solidlineinfigure F.2of IEC 60990 at variousfrequencies. Acalibration curve is
constructed showing thedeviation of fromthe idealcurve asafunction offrequency.
TOUCHCURRENT= /500 (peak value).
V: Voltmeter or oscilloscope
(r.m.s. or peak reading)
The part or contact of aTERMINAL isnot HAZARDOUSLIVE if:
Note: The limit values of =0.35 V(peak) fora.c. and =1.0Vfor d.c. correspondto
the values0.7mA(peak) a.c.and 2.0mA d.c.
a)The open-circuit voltage shouldnot exceed35 V(peak) a.c. or 60Vd.c.or, if a)isnot
met.
b)The measurement ofthe TOUCH CURRENT shall be carriedout inaccordance with
IEC 60990, withthe measuringnetworkdescribed in AnnexD of thisstandard.
The TOUCH CURRENT expressedas voltages and ,does not exceedthe
followingvalues:
- for a.c. : =35V(peak) and =0.35 V(peak);
- for d.c. : =1.0V
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ProductSafetyNotice
Many electricaland mechanicalpartsin this chassis have specialsafety-related
characteristics. These characteristics are often passed unnoticedby avisualinspection and
the protection afforded by themcannotnecessarily beobtained by using replacement
components rated forhighervoltage, wattage, etc. Replacementparts whichhave these
specialsafetycharacteristicsare identified in this manualand its supplements;electrical
components having such features are identified bythe internationalhazard symbols on the
schematic diagramandthe parts list.
Before replacing any ofthese components, read the parts listin this manualcarefully. The
use ofsubstitute replacementparts which do nothavethe same safety characteristicsas
specifiedin the partslistmay create electricalshock, fire, orotherhazards.
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SAFETY INSTRUCTION
SafetyPrecaution
1.An isolation transformershould be connectedin the powerline between thereceiver
and the ACline before any service is performed on the receiver.
2.Always disconnectthe powerplug before any disassembling ofthe product. Itmay
resultin electricalshock.
3.When replacing a chassis in the cabinet, always be certain thatallthe protective
devices areputback inplace, such as nonmetalliccontrolknobs, insulating covers,
shields, isolation resistor-capacitornetwork, etc.
4.
Always keep tools,components oftheproduct, etc away fromthe children, These items
may cause injury to children.
5.Depending on the model, use anisolation transformerorwearsuitable gloves when
servicing withthe poweron, and disconnectthe powerplugto avoid electricalshock
when replacing parts. In some cases, alternating currentis alsoimpressed in the
chassis, so electricalshock is possible ifthe chassis is contacted with the poweron.
6.Always usethe replacementparts specified forthe particularmodelwhen making
repairs. The parts used in products requirespecialsafetycharacteristicssuch as
WARNING: BEFORESERVICINGTHISCHASSIS,READTHE"SAFETY
PRECAUTION"AND"PRODUCTSAFETYNOTICE"INSTRUCTIONSBELOW.
WARNING: SERVICINGSHOULDNOTBEATTEMPTEDBYANYONE
UNFAMILIARWITHTHENECESSARYPRECAUTIONSONTHISRECEIVER.
THEFOLLOWINGARETHENECESSARYPRECAUTIONSTO BEOBSERVED
BEFORESERVICING THISCHASSIS.
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1
of
4

inflammability, voltageresistance, etc. therefore, use only replacementparts thathave
these same characteristics. Use only the specified parts when the markis indicated
in the circuit diagramorpartslist.
7.Parts mounting and routing dressing ofwirings should be the same as thatused
originally. Forsafety purposes, insulating materials such as isolation tube ortapeare
sometimes used and printed circuitboards are sometimes mounted floating. Also make
sure thatwirings isroutedand clamped to avoid parts thatgenerateheatand which use
high voltage. Always followthe manufactured wiring routes /dressings.
8.Always ensure thatallinternalwirings are in accordance before re-assembling the
externalcasing aftera repairing completed. Do notallowinternalwiring to be pinched
by cabinets, panels, etc. Any errorin reassembly orwiring can resultin electrical
leakage, flame, etc., and may be hazardous.
9.
NEVERremodelthe productin any way. Remodeling can resultin improperoperation,
malfunction, orelectricalleakageand flame, which may be hazardous.
10.Touch currentcheck. (Aftercompleting the work, measure touch currentto preventan
electric shock.)
lPlug the ACcord directly into the ACoutlet. Do NOT use an isolation transformer
forthis check.
lConnecta measuring network fortouch currents between each exposed metallic part
on the setand a good earth ground such as a waterpipe.
Annex D
(normative)
Measuring network for TOUCH CURRENTS
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2
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4