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.
Page
4
of
4

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.
Page
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
Page
2
of
4

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
Page
3
of
4

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.
Page
4
of
4

SAFETY INSTRUCTION
HandlingtheLCD Module
Safety Precaution
In the eventthatthescreen is damaged orthe liquid crystal(fluid)leaks, do notbreathein or
drink this fluid.
Also, nevertouch this fluid. Such actions could cause toxicity orskin irritation. If this fluid
should enterthemouth, rinse the mouth thoroughly with water. If the fluid shouldcontactthe
skin orclothing, wipeoff with alcohol, etc., and rinse thoroughly with water. Ifthe fluid
should entertheeyes, immediately rinse the eyes thoroughly with running water.
Precautions forHandlingthe LCD Module
TheLCDmodule can easily be damaged during disassembly orreassembly;therefore,
always observe the following precautions when handling the module.
1.
When attaching the LCDmodule to the LCDcover,position it appropriately and fasten
attheposition where the display can be viewed mostconveniently.
2.Carefully align theholes atallfourcorners ofthe LCDmodulewith thecorresponding
holes inthe LCDcoverand fasten with screws. Do notstrongly push on themodule
because any impactcan adversely affecttheperformance. Also use cautionwhen
handling the polarized screen because itcan easily be damaged.
CAUTION:The metaledges ofthe LCDmoduleare sharp,handleitwith
care.
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Handling the LCDModule

3.Ifthe panelsurface becomes soiled, wipewith cotton ora softcloth. Ifthis does not
removethe soiling, breathe on the surface and then wipeagain.
Ifthe panelsurface is extremely solied, use aCRTcleanerasa cleaner. Wipe offthe
panelsurface by drop thecleaneron thecloth. Do notdrop the cleaneron the panel.
Pay attention notto scratch the panelsurface.
4.Leaving waterorotherfluids on the panelscreen foran extended period oftime can
resultin discoloration orstripes. Immediately remove any typeoffluid fromthe screen.
5.Glass isused in thepanel, sodo notdrop orstrike with hard objects. Such actions can
damagethe panel.
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Handling the LCDModule

6.CMOS-LSIcircuitry is used in theLCD module, soavoid damage due to static
electricity. When handling the module, usea wristground oranchorground.
7.Do notexpose the LCDmodule todirectsunlightorstrong ultravioletrays foran
extended period oftime.
8.Do notstore the LCDmodule belowthe temperature conditions described in the
specifications. Failure to do so could resultin freezing ofthe liquid crystaldue to cold
airorlossofresilienceorotherdamage.
9.Do notdisassemblethe LCDmodule. Such actions could resultin improperoperation.
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Handling the LCDModule

10.When transporting theLCDmodule, do notuse packingcontaining epoxy resin
(amine)orsilicon resin (alcoholoroxim). Thegas generated by these materials can
cause loss ofpolarity.
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Handling the LCDModule

N
o
n
656
YCbCr16bit
Bt6018Bit
HD,VD,CLK
U
A
R
T
R
E
Q
ACINPUT&
POWERBOARD
CORTEZLite
Analog
Front
End
(16port)
Video
Decoder
MUX
VBIData
Processor
DCDi
MADi
Scaling BEP
OSD
LVDS
Micro-
processor
IRI/F ADC
GPIO
Digital
InputA
HDMI
Cortez
Regulator
EEPROM
FLASHROM
I2C
I2
C
MAINBOARD
I
2
C
FLI8541BE
+LowB
POWERBOARD
TIF
LCDPANEL
PANELI/F
Standby
uCON
H
D
M
I
DACAMP
SW
HDMI
DDRRAM*1
IC401
CIMax-SP2L
PJ400
DVB-CI×1
PJ212
Serialport
fordebug
IC221
256MbitDDRSDRAM
IC281
64MbitFlash
IC191
VCXO IC201
64KbitEEPROM
EBIF:ExternalBusInterface
MIF:DDRSDRAMMemoryInterface
IC801
COFDMDemod
IC301
AudioDAC
P212B
AudioOUT
CVBSOUT
IC100
Donau
TC90403FG
P820APOWER
3.3V2.5V33V 12V 6.0V
Uart2forcomm.
MIF
EBIF
H801
Tuner
IFAmp
P200B
DigitalVIDEOOUT
UART
M_TVRESE
T
IC302
AudioAmp
X801
20.48MHzClock
IC181
Reset
X191
27MHzX-tal
I2C
Uart0
TS
TS
RESET
CLK(27MHz)
8
I
T
U
-
R
6
5
6
C
V
B
S
CVBS/Audio(LR
)
DigitalBOARD
(A3030DONLY)
DTV8bit
RFInput
RF
EXT3
(FRONT) CVBS
L/R
EXT3
(REAR) Y/Cb/Cr
L/R
PC R/G/B/H/V
SoundAMP
MTS+
APRO
MSP
SPEAKER(L/R)
Headphone(L/R)
S
I
F
CVBS/RGBFB/SY/SC/(Y/Cb/Cr)or(RGBHV)
75ohm
Driver
75ohm
Driver
D
T
V
(
V
)
D
T
V
(
V
)
D
T
V
(
V
L
R
)
A
T
V
(
V
)
EXT1
(SCART)
CVBS
LR
R/G/B/FB
TVOUTV
TVOUTL/R
EXT2
(SCART)
SY/C
LR
TVOUTV
TVOUTL/R
L/RPC/HDMI
DIGITALDATA
CONNECTor
DISCONNECT
REMOTE
RECEIVER
TACT
KEY
L/R
AUDIO
OUT

SCHEMATIC DIAGRAM
Precaution
Note:
1.RESISTOR
Resistance isshown in ohm[K=1,000, M=1,000,000]. All resistors are1/6 W and 5 %
tolerancecarbon resistor, unless otherwise noted as the following marks.
2.CAPACITOR
Unless otherwise noted in schematic, allcapacitorvalues less than 1 are expressed in
µF, and the values more than 1 in pF.
Allcapacitors are ceramic 50 V,unless otherwisenoted as the following marks.
WARNING: BEFORESERVICINGTHISCHASSIS,READTHE"X-RAY
RADIATIONPRECAUTION"FORDIRECTVIEWCTVONLY,"SAFETY
PRECAUTION"AND"PRODUCTSAFETYNOTICE"OFTHISMANUAL.
CAUTION:The internationalhazard symbols" " inthe schematicdiagram
and thepartslist designatecomponentswhich havespecialcharacteristics
importantfor safetyandshouldbe replaced onlywithtypesidenticalto
thoseintheoriginalcircuitor specified inthe partslist.
The mountingpositionofreplacementsistobe identicalwithoriginals.
Before replacing any ofthesecomponents,read carefullythe SAFETY
PRECAUTIONand PRODUCTSAFETYNOTICE.
Donotdegrade thesafetyof thereceiver throughimproper servicing.
1/2R:MetalorMetaloxide of1/2 watt
1/2S:Carbon composition of1/2 watt
1RF:Fuseresistorof1 watt
10 W :Cementof10 watt
K:±10 %
G :±2 %
F :±1 %
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3.Theparts indicated with " "have specialcharacteristics, and should be replaced with
identicalparts only.
4.Voltages read withDIGITAL MULTI-METERfrompointindicated to chassis ground,
using a colorbarsignalwith allcontrols atnormal, line voltageatnominalAC volts.
5.Waveforms are taken receiving colorbarsignalwith enough sensitivity.
6.Voltage reading shown are nominalvalues and may vary±20 %exceptH.V.
= Electrolytic capacitor
= Mylarcapacitor
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