Toshiba 32CV505D User manual

SERVICE MANUAL
LCDColor Television
32CV505D Ver. 2.01
Thismodelis classified as a green product
(*1), as indicated by the underlined serialnumber.
ThisService Manualdescribes replacementpartsforthe green product. When repairing this
green product, usethe part(s)described in this manualand lead-free solder (*2).
For(*1)and (*2), referto GREENPRODUCTPROCUREMENT and LEAD-FREE
SOLDER.
©TOSHIBACORPORATION
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GREEN PRODUCT PROCUREMENT
The ECis actively promoting the WEEE &RoHS Directivesthatdefine standards for
recycling and reuseofWaste Electricaland Electronic Equipmentand forthe Restriction of
the use ofcertain HazardousSubstances. 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 key managementtasks, and is doing its
utmostto enhance and improve the quality and scopeofits environmentalactivities. In line
with this, Toshibaproactively promotes GreenProcurement, and seeks topurchase and use
products, parts and materials thathave lowenvironmentalimpacts.
Green procurementofparts isnotonly confined to manufacture. The same green parts used
inmanufacture mustalso beused asreplacementparts.
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GREENPRODUCT PROCUREMENT

LEAD-FREE SOLDER
Thisproductis manufactured using lead-freesolderas apartofa movementwithinthe
consumerproducts industry atlarge to beenvironmentally responsible. Lead-
freesoldermust
be used in the servicing and repairofthisproduct.
The melting temperatureoflead-freesolderishigherthan thatofleaded solderby 86 F to
104 F (30 Cto40 C). Useofa soldering iron designed forlead-based solders to repair
productmade with lead
-
free soldermayresultin damage to the componentand orPCB being
soldered. Greatcareshould bemadeto ensure high-quality soldering when servicing this
productespecially when soldering large components, through
-hole pins, and on PCBs asthe
levelofheatrequired to meltlead-free solderishigh.
WARNING: Thisproductismanufacturedusing lead free solder.
DONOTUSELEADBASEDSOLDER TOREPAIRTHISPRODUCT!
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LEAD
-
FREE SOLDER

SAFETY INSTRUCTION
SafetyPrecaution
1.An isolation transformershould be connected in the powerlinebetween the receiver
and the ACline before any service is performed on the receiver.
2.Always disconnectthe powerplug before any disassembling ofthe product. It may
resultin electricalshock.
3.When replacing a chassisin thecabinet, always be certain thatallthe protective
devices are putback in place, such as nonmetallic controlknobs, insulating covers,
shields, isolation resistor-capacitornetwork, etc.
4.
Always keep tools, componentsoftheproduct, etc away fromthe children, These items
may causeinjury to children.
5.Depending on the model, use an isolation transformerorwearsuitable gloves when
servicing with the poweron, and disconnectthepowerplug to avoid electricalshock
when replacing parts. In somecases, alternating currentis also impressed in the
chassis, so electricalshock ispossible ifthe chassis is contacted withthe poweron.
6.Always usethe replacementpartsspecified fortheparticularmodelwhen making
repairs. The parts used in products requirespecialsafety characteristicssuch as
WARNING: BEFORESERVICINGTHISCHASSIS,READ THE "SAFETY
PRECAUTION"AND"PRODUCTSAFETYNOTICE"INSTRUCTIONSBELOW.
WARNING: SERVICINGSHOULDNOTBEATTEMPTEDBYANYONE
UNFAMILIARWITHTHE NECESSARYPRECAUTIONSON THISRECEIVER.
THE FOLLOWINGARE THE NECESSARYPRECAUTIONSTOBEOBSERVED
BEFORESERVICINGTHISCHASSIS.
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inflammability, voltage resistance, etc. therefore, use only replacementparts thathave
these same characteristics. Use only the specifiedparts when the mark isindicated
in the circuitdiagramorparts list.
7.Parts mounting and routingdressing ofwiringsshould bethe sameas thatused
originally. Forsafety purposes, insulating materials such as isolation tube ortape are
sometimes used and printed circuitboardsare sometimes mounted floating. Also make
sure thatwirings is routed and clamped to avoid parts thatgenerate heatand which use
high voltage. Always followthe manufactured wiring routes /dressings.
8.Always ensure thatallinternalwirings are inaccordance beforere-assembling the
externalcasing aftera repairing completed. Do notallowinternalwiring to bepinched
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, orelectricalleakage and flame, which may behazardous.
10.Touch currentcheck. (Aftercompleting the work, measure touch currentto preventan
electric shock.)
lPlug the ACcord directly into the ACoutlet. Do NOTuse an isolation transformer
forthis check.
lConnecta measuring network fortouch currents between each exposed metallicpart
on the setand a good earth ground such as a waterpipe.
Annex D
(normative)
Measuring network for TOUCH CURRENTS
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lThe potentialatany point(TOUCHCURRENT)expressed as voltage and
doesnotexceed thefollowing value:
Resistance values in orms ( ).
Input resistance : 1 M
Input capacitance : 200pF
Frequency range : 15 Hz to 1 MHz and d.c. respectively
Note: Appropriate measures should be taken to obtain the correct valuein caseof non
sinusoidal waveforms.
Themeasuring instrument is calibratedby comparing the frequency factor of with the
solid line infigure F.2 of IEC 60990 at various frequencies. A calibration curveis
constructedshowing the deviation of from theideal curve asa function of frequency.
TOUCH CURRENT = /500 (peak value).
V: Voltmeter or oscilloscope
(r.m.s. or peak reading)
Thepart orcontact of a TERMINAL is not HAZARDOUS LIVE if:
Note: The limitvalues of =0.35 V (peak) for a.c. and =1.0 Vfor d.c. correspond to
the values 0.7 mA (peak) a.c. and 2.0 mAd.c.
a) Theopen-circuit voltage should notexceed 35 V (peak) a.c. or 60 V d.c. or, if a)is not
met.
b) Themeasurementof the TOUCH CURRENTshall be carried out inaccordance with
IEC60990, with themeasuring network describedin Annex D of this standard.
TheTOUCH CURRENTexpressed as voltages and , does not exceed the
following values:
- for a.c. : =35 V(peak) and =0.35 V (peak);
- for d.c. : =1.0 V
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ProductSafetyNotice
Manyelectricaland mechanicalparts in this chassishave specialsafety-related
characteristics. These characteristicsareoften passed unnoticed by a visualinspection and
the protection afforded by themcannotnecessarily be obtained by using replacement
components rated forhighervoltage, wattage, etc. Replacementparts which have these
specialsafety characteristics are identified in this manualand its supplements;electrical
components having such features are identified by the internationalhazard symbols on the
schematicdiagramand theparts list.
Before replacing any ofthese components, read the partslistin this manualcarefully. The
use ofsubstitutereplacementparts which do nothave the same safety characteristics as
specified in theparts listmay create electricalshock, fire, orotherhazards.
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PCB LAYOUT
U06A
KEY
U03A
ASSW
U01A
POWER
U05A
MAIN
U04B RMT
U04A LED
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IMPORTANT NOTICE
WARNING:
Youare requested thatyoushallnot modifyoralter theinformationor data
provided hereinwithout prior writtenconsentbyToshiba.Toshiba shall not
be liabletoanybody for any damages,losses,expenses or costs,ifany,
incurred inconnection withor asaresultofsuch modification oralteration.
THE INFORMATIONORDATAHEREINSHALLBEPROVIDED"ASIS"
WITHOUTANYWARRANTYOFANYKIND, EITHEREXPRESS ORIMPLIED
WARRANTYOFMERCHANTABILITYANDFITNESSFORAPARTICULAR
PURPOSE.
Toshibashallnot be liablefor anydamages,losses,expensesorcosts,if
any,incurred inconnectionwithoras aresultofuse ofanyinformationor
dataprovided herein.
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WARNING

N
o
n
656
YCbCr16bit
Bt6018Bit
HD,VD,CLK
U
A
R
T
R
E
Q
Sequoia
Analog
Front
End
(16port)
Video
Decoder
MUX
VBIData
Processor
DCDi
MADi
Scaling BEP
OSD
LVDS
Micro-
processor
IRI/F ADC
GPIO
Digital
InputA
HDMI
Sequoia
Regulator
EEPROM
FLASHROM
I
2C
I2C
MAINBOARD
I
2
C
FLI32626H-AC
ACINPUT&+LowB
POWERBOARD
TIF
LCD
PANEL
PANELI/F
StandbyuCON
(LPM)DAC
AMP
HDMI
DDRRAM*1
VideoCVBS/DigitalAudioL/R
DTV8bit
IC701~IC714
Levelsift
LogicIC
PJ700
DVB-CIx1
IC107
256Mbit
DDRSDRAM
IC110
64MbitFlash
IC105
VCXO IC106
64KbitEEPROM
EBIF:ExternalBusInterface
MIF:DDRSDRAMMemoryInterface
IC100
DonauTC90403FG MIF
EBIF
M_TVRESE
T
X8001
20.48MHzClock
IC102
Reset
X1001
27MHzX-tal
I2C
TS
TS
RESET
CLK(27MHz)
8
I
T
U
-
R
6
5
6
CVBS
DigitalBlock
RF
EXT3
(REAR) Composite
L/R
SoundAMP
MTS+
APRO
MSP
SPEAKER(L/R)
Headphone(L/R)
S
I
F
EXT1
(SCART)
CVBS
LR
R/G/B/FB
TVOUTV
75ohm
Driver
75ohm
Driver
TVOUTL/R
EXT2
(SCART)
SY/C
LR
TVOUTV
TVOUTL/R
L/RDVI/HDMI
REMOTE
RECEIVER
TACT
KEY
AudioL/R
IF
UART
P950BPOWER
3.3V5V2 24V9.0V6.0V
P951BPOWER
5V1 32V
COFDM
Demod
ADCInput Audio
Mux Audio
DSP
EXT4
(REAR) R/G/B
L/R I2S
S
P
D
I
F
D
T
V
(
A
o
u
d
i
o
L/R)
IC650
AudioDAC
IC651
AudioAmp
WatchDog
Timer