Toshiba 42AV501P Bedienungsanleitung

SERVICE MANUAL

LCDColor Television

42AV501P 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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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

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

PCB LAYOUT

U01A

SIGNAL U03A

POWER

U02A

KEY/LED/RMT

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BLOCKDIAGRAM

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SAFETY INSTRUCTION

SafetyPrecaution

1.An isolation transformershould be connected in the powerlinebetween the receiver

and the ACline beforeany 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.

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 routing dressing ofwiringsshould bethe sameas thatused

originally. Forsafetypurposes, 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.

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 the parts 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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SAFETY INSTRUCTION

Handling theLCDModule

Safety Precaution

In the eventthatthe screen is damaged orthe liquid crystal(fluid)leaks, do notbreathein or

drink this fluid.

Also, nevertouch this fluid. Such actions could cause toxicity orskin irritation. Ifthis fluid

should enterthe mouth, rinse the mouth thoroughly with water. Ifthe fluid should contactthe

skin orclothing, wipe offwith alcohol, etc., and rinse thoroughly with water. Ifthe fluid

should enterthe eyes, immediately rinsethe eyes thoroughly with running water.

Precautions forHandlingthe LCD Module

The LCDmodule can easily bedamaged during disassembly orreassembly;therefore,

always observe thefollowing precautions when handling the module.

When attaching the LCDmodule to the LCDcover, position itappropriately and fasten

atthe position wherethe display can beviewed mostconveniently.

2.Carefully align the holes atallfourcorners ofthe LCDmodulewith the corresponding

holes inthe LCDcoverand fasten with screws. Do notstrongly push on the module

because any impactcan adversely affectthe performance. Also use caution when

handling the polarized screen becauseitcan easily be damaged.

CAUTION:Themetaledgesofthe LCDmoduleare sharp,handleit with

care.

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Handling theLCD Module

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