Sharp LC-13SH1U User manual

1
LC-13SH1U
S74Y1LC13SH1U
SERVICE MANUAL
In the interests of user-safety (Required by safety
regulations in some countries) the set should be
restored to its original condition and only parts
identical to those specified be used.
MODEL
SERVICE MANUAL LCD COLOR TV MODEL LC-13SH1U
LCD COLOR TV
This document has been published to be used for
after sales service only.
Thecontentsaresubjecttochangewithoutnotice.
SHARP CORPORATION
LC-13SH1U
Page
SPECIFICATIONS ................................................................................................................................ 1-1
IMPORTANT SAFEGUARDS AND PRECAUTIONS............................................................................ 2-1
STANDARD NOTES FOR SERVICING................................................................................................ 3-1
CABINET DISASSEMBLY INSTRUCTIONS ........................................................................................ 4-1
ELECTRICAL ADJUSTMENT INSTRUCTIONS................................................................................... 5-1
TROUBLESHOOTING .......................................................................................................................... 6-1
BLOCK DIAGRAMS.............................................................................................................................. 7-1
SCHEMATIC DIAGRAMS/ CBA’S AND TEST POINTS ....................................................................... 8-1
WAVEFORMS & VOLTAGE CHART.................................................................................................... 9-1
WIRING DIAGRAM ............................................................................................................................. 10-1
IC PIN FUNCTION DESCRIPTIONS .................................................................................................. 11-1
EXPLODED VIEWS ............................................................................................................................ 12-1
MECHANICAL PARTS LIST ............................................................................................................... 13-1
ELECTRICAL PARTS LIST ................................................................................................................ 14-1
CONTENTS

1-1 L0170SP
SPECIFICATIONS
<TUNER>
ANT. Input ........................... 75ohm Unbal., F type
Reference Level..................20Vp-p (CRT Green Cathode)
Test Input Signal ................. 400Hz 30% modulation
Description Condition Unit Nominal Limit
1. Intermediate Freq. Sound
Picture MHz MHz 41.25 45.75 - -
2. Color Killer Sens. CH-55 CH-10
CH-2
dBµV
dBµV
dBµV
15
15
15
20
20
20
(10mV input)
3. AFT Pull In Range - MHz ±2.1 ±0.7
<LCD PANEL>
Description Condition Unit Nominal Limit
1. Number of Pixels Vertical
Horizontal pixels pixels 480 640 x 3 - -
2. Brightness cd/m
2
420 -
3. Color Gamut - % 64 -
4. Response Time - msec 16 -
5. Support Color - - 16mil.(8bit)-
(at contrast 1:10 min.)
6.Viewing Angle Vertical
Horizontal -85 to 85 -85 to 85 -
°
°
The LCD panel is manufactured to provide many years of useful life. Occasionally a
few non active pixels may appear as a tiny spec of color. This is not to be considered
a defect in the LCD screen.

1-2 L0170SP
<VIDEO>
Description Condition Unit Nominal Limit
1. Over Scan Vertical
Horizontal % % 5 5- -
2. Color Temperature (80% WHITE)y
x
-°K0.307
0.292
8500+10MPCD
±0.01
±0.01
-
3. Color Temperature (40% WHITE)y x
-°K0.299
0.286
9000
±0.01
±0.01
-
4. Resolution Vertical
Horizontal line line 350 400 - -
<AUDIO>
All items are measured across 8Ωload at speaker output terminal with L.P.F.
Description Condition Unit Nominal Limit
1. Audio Output Power 10% THD: Lch/Rch W 1.0/1.0 0.8/0.8
2. Audio Distortion 500mW: Lch/Rch % 1.0/1.0 4.0/4.0
3. Audio Freq. Response -3dB: Rch
-3dB: Lch Hz Hz 50 to 12K 50 to 12K - -
Note:
Nominal specifications represent the designspecifications. All units should be able to approximate these. Somewill
exceed and some may drop slightly below these specifications. Limit specifications represent the absolute worst
condition that still might be considered acceptable. In no case should a unit fail to meet limit specifications.

2-1 LCVISP
IMPORTANT SAFEGUARDS AND PRECAUTIONS
Safety Precautions for TV Circuit
1. Before returning an instrument to the customer,
alwaysmakeasafetycheckoftheentireinstrument,
including, but not limited to, the following items:
a. Be sure that no built-in protective devices are
defective and have been defeated during servicing.
(1)Protectiveshieldsareprovidedonthischassisto
protect both the technician and the customer.
Correctly replace all missing protective shields,
including any removed for servicing convenience.
(2) When reinstalling the chassis and/or other
assemblyinthe cabinet,besuretoputbackin place
all protective devices, including but not limited to,
nonmetallic control knobs, insulating fishpapers,
adjustment and compartment covers/shields, and
isolationresistor/capacitornetworks.Donotoperate
thisinstrumentorpermitittobeoperatedwithout
all protective devices correctly installed and
functioning.Servicerswhodefeatsafetyfeatures
or fail to perform safety checks may be liable for
any resulting damage.
b. Be sure that there are no cabinet openings through
which an adult or child might be able to insert their
fingers and contact a hazardous voltage. Such
openings include, but are not limited to, (1) spacing
between the picture tube and the cabinet mask,
(2) excessively wide cabinet ventilation slots, and
(3) an improperly fitted and/or incorrectly secured
cabinet back cover.
c. AntennaCold Check-WiththeinstrumentACplug
removed from any AC source, connect an electrical
jumper across the two AC plug prongs. Place the
instrument AC switch in the on position. Connect
one lead of an ohmmeter to the AC plug prongs tied
together and touch the other ohmmeter lead in turn
toeachtunerantenna input exposedterminalscrew
and, if applicable, to the coaxial connector. If the
measured resistance is less than 1.0 megohm or
greaterthan5.2megohm,anabnormalityexiststhat
must be corrected before the instrument is returned
tothe customer.Repeatthistestwiththeinstrument
AC switch in the off position.
d. Leakage Current Hot Check - With the instrument
completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an
isolationtransformerduringthistest.)Usealeakage
current tester or a metering system that complies
with American National Standards Institute (ANSI)
C101.1 Leakage Current for Appliances and
Underwriters Laboratories (UL) 1410, (50.7). With
the instrument AC switch first in the on position and
Prior to shipment from the factory, our products are strictly inspected for recognized product safety and electrical
codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally
important to implement the following precautions when a set is being serviced.
thenintheoff position, measure fromaknownearth
ground(metalwaterpipe,conduit,etc.)toallexposed
metal parts of the instrument (antennas, handle
brackets, metal cabinet, screw heads, metallic
overlays,controlshafts,etc.),especiallyanyexposed
metal parts that offer an electrical return path to the
chassis.Anycurrentmeasuredmustnotexceed0.5
milli-ampere. Reverse the instrument power cord
plug in the outlet and repeat the test.
_
DEVICE
LEAKAGE
CURRENT
TESTER
ALSO TEST WITH
PLUG REVERSED
USING AC
ADAPTER PLUG
AS REQUIRED
TEST ALL EXPOSED
METAL SURFACES
+
READING SHOULD
NOT BE ABOVE 0.5 mA
EARTH
GROUND
BEING
TESTED
ANYMEASUREMENTSNOTWITHINTHELIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED
BEFORERETURNINGTHEINSTRUMENTTOTHE
CUSTOMER OR BEFORE CONNECTING THE
ANTENNA OR ACCESSORIES.
e. X-Radiation and High Voltage Limits - Because
the picture tube is the primary potential source of X-
radiation in solid-state TV receivers, it is specially
constructed to prohibit X-radiation emissions. For
continued X-radiation protection, the replacement
picture tube must be the same type as the original.
Also,becausethepicturetubeshieldsandmounting
hardwareperformanX-radiationprotectionfunction,
theymustbecorrectlyinplace.Highvoltagemustbe
measured each time servicing is performed that
involves B+, horizontal deflection or high voltage.
CorrectoperationoftheX-radiationprotectioncircuits
alsomustbereconfirmedeachtimetheyareserviced.
(X-radiation protection circuits also may be called
"horizontaldisable"or"holddown.")Readandapply
the high voltage limits and, if the chassis is so
equipped, the X-radiation protection circuit

2-2 LCVISP
specifications given on instrument labels and in the
Product Safety & X-Radiation Warning note on the
service data chassis schematic. High voltage is
maintainedwithinspecifiedlimitsbyclosetolerance
safety-relatedcomponents/adjustmentsinthehigh-
voltage circuit. If high voltage exceeds specified
limits,checkeachcomponentspecifiedonthechassis
schematic and take corrective action.
2. Readandcomplywith all caution andsafety-related
notes on or inside the receiver cabinet, on the
receiver chassis, or on the picture tube.
3. Design Alteration Warning - Do not alter or add to
themechanicalorelectricaldesignofthisTVreceiver.
Design alterations and additions, including, but not
limited to circuit modifications and the addition of
items such as auxiliary audio and/or video output
connections,mightalterthesafetycharacteristicsof
this receiver and create a hazard to the user. Any
design alterations or additions will void the
manufacturer's warranty and may make you, the
servicer, responsible for personal injury or property
damage resulting therefrom.
4. PictureTubeImplosionProtectionWarning-The
picturetubeinthisreceiveremploysintegralimplosion
protection. For continued implosion protection,
replace the picture tube only with one of the same
type number. Do not remove, install, or otherwise
handle the picture tube in any manner without first
putting on shatterproof goggles equipped with side
shields.Peoplenotsoequippedmustbekeptsafely
away while picture tubes are handled. Keep the
picturetubeawayfromyourbody.Donothandlethe
picturetubebyitsneck.Some"in-line"picturetubes
areequippedwithapermanentlyattacheddeflection
yoke; because of potential hazard, do not try to
remove such "permanently attached" yokes from
the picture tube.
5. Hot Chassis Warning -
a. SomeTVreceiverchassisareelectricallyconnected
directly to one conductor of the AC power cord and
maybe safety-serviced without an isolation
transformer only if the AC power plug is inserted so
that the chassis is connected to the ground side of
the AC power source. To confirm that the AC power
plug is inserted correctly, with an AC voltmeter,
measure between the chassis and a known earth
ground. If a voltage reading in excess of 1.0V is
obtained, remove and reinsert the AC power plug in
theoppositepolarity andagainmeasurethevoltage
potential between the chassis and a known earth
ground.
b. Some TV receiver chassis normally have 85V
AC(RMS) between chassis and earth ground
regardless of the AC plug polarity. This chassis can
besafety-servicedonlywithanisolationtransformer
inserted in the power line between the receiver and
the AC power source, for both personnel and test
equipment protection.
c. SomeTVreceiverchassishaveasecondaryground
system in addition to the main chassis ground. This
secondary ground system is not isolated from the
AC power line. The two ground systems are
electrically separated by insulation material that
must not be defeated or altered.
6. Observe original lead dress. Take extra care to
assure correct lead dress in the following areas:a.
near sharp edges,b. near thermally hot parts-be
sure that leads and components do not touch
thermallyhot parts,c. theAC supply,d.highvoltage,
and,e.antennawiring.Alwaysinspectinallareasfor
pinched, out of place, or frayed wiring. Check AC
power cord for damage.
7. Components, parts, and/or wiring that appear to
have overheated or are otherwise damaged should
be replaced with components, parts, or wiring that
meetoriginalspecifications.Additionally,determine
the cause of overheating and/or damage and, if
necessary, take corrective action to remove any
potential safety hazard.
8. Product Safety Notice - Some electrical and
mechanical parts have special safety-related
characteristics which are often not evident from
visual inspection, nor can the protection they give
necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc..
Parts that have special safety characteristics are
identifiedbya(#)onschematicsandinpartslists.
Use of a substitute replacement that does not have
thesamesafetycharacteristicsastherecommended
replacement part might create shock, fire, and/or
other hazards. The product's safety is under review
continuously and new instructions are issued
whenever appropriate. Prior to shipment from the
factory,ourproductsarestrictlyinspectedtoconfirm
they comply with the recognized product safety and
electrical codes of the countries in which they are to
be sold. However, in order to maintain such
compliance, it is equally important to implement the
following precautions when a set is being serviced.

2-3 LCVISP
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
CAUTION: FOR CONTINUED
PROTECTIONAGAINSTARISKOF
FIRE REPLACE ONLYWITH SAME
TYPE F3701 (2.0A, 250V), F3702
(1.25A, 250V), AND F6701 (6.3A,
250V) FUSE.
A V
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks:
1. Inspect all lead dress to make certain that leads are
not pinched, and check that hardware is not lodged
between the chassis and other metal parts in the
receiver.
2. Inspect all protective devices such as non-metallic
control knobs, insulation materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
•Plug the AC cord directly into a 110~240 volt AC
outlet, and connect the DC power cable into the
receiver’s DC jack. (Do not use an isolation
transformer for this test).
•Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series
with all exposed metal cabinet parts and a known
earth ground, such as electrical conduit or electrical
ground connected to an earth ground.
IMPORTANT SERVICE SAFETY PRECAUTION
Service work should be performed only by qualified service technicians who are
thoroughly familiar with all safety checks and the servicing guidelines which follow:
•UseanACvoltmeter having with5000ohmper volt,
orhigher,sensitivityormeasuretheACvoltagedrop
across the resistor.
•Connecttheresistorconnectiontoallexposedmetal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon,etc.) andmeasure the AC voltage drop
across the resistor.
All checks must be repeated with the AC cord plug
connection reversed. (If necessary, a nonpolarized
adaptor plug must be used only for the purpose of
completing these checks.)
Any reading of 0.75V peak (this corresponds to 0.5
mA. peak AC.) or more is excessive and indicates a
potential shock hazard which must be corrected
before returning the monitor to the owner.
DVM
AC SCALE
1.5k ohm
10W
T
O EXPOSED
M
ETAL PARTS CONNECT TO KNOWN EART
H
GROUND
0.15 F
TEST PROBE
Manyelectrical andmechanical partsin LCD television
have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarilyincreasedbyusingreplacementcomponents
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
componentshavingsuchfeaturesareidentifiedby“#”
andshadedareasintheReplacement Parts Listsand
Schematic Diagrams.
For continued protection, replacement parts must be
identical to those used in the original circuit.
The use of a substitute replacement parts which do not
have the same safety characteristics as the factory
recommended replacement parts shown in this service
manual, may create shock, fire or other hazards.
SAFETY NOTICE

2-4 LCVISP
AVERTISSEMENT
1. N’entreprendre aucune modification de tout circuit.
C’est dangereux.
2. Débrancher le récepteur avant toute réparation.
PRECAUTION: POUR LA
PROTECTION CONTINUE
CONTRE LES RISQUES
D'INCENDIE, REMPLACER LE
FUSIBLE PAR UN FUSIBLE DE
MEME TYPE F3701 (2.0A, 250V),
F3702 (1.25A, 250V) F6701 (6.3A,
250V).
A V
VERIFICATIONS CONTRE L’INCEN-DIE
ET LE CHOC ELECTRIQUE
Avantderendrelerécepteuràl’utilisateur,effectuer
les vérifications suivantes.
1. Inspectertouslesfaisceauxdecâblespours’assurer
quelesfilsnesoientpaspincésouqu’unoutilnesoit
pas placé entre le châssis et les autres pièces
métalliques du récepteur.
2. Inspecter tous les dispositifs de protection comme
les boutons de commande non-métalliques, les
isolants,ledosducoffret,lescouverclesoublindages
de réglage et de compartiment, les réseaux de
résistance-capacité,lesisolateursmécaniques,etc.
3. S’assurer qu’il n’y ait pas de danger d’électrocution
en vérifiant la fuite de courant, de la facon suivante:
•Brancher le cordon d’alimentation directem-ent à
une prise de courant de 110-240V. (Ne pas utiliser
de transformateur d’isolation pour cet essai).
•Al’aidededeuxfilsàpinces,brancherunerésistance
de1.5kΩ10wattsenparallèleavecuncondensateur
de0.15µFensérieavectouteslespiècesmétalliques
exposéesducoffretetuneterreconnuecommeune
PRECAUTIONS A PRENDRE LORS DE LA REPARATION
Ne peut effectuer la réparation qu’ un technicien spécialisé qui s’est parfaitement
accoutumé à toute vérification de sécurité et aux conseils suivants.
conduite électrique ou une prise de terre branchée
à la terre.
•UtiliserunvoltmètreCAd’unesensibilitéd’aumoins
5000Ω/Vpourmesurerlachutedetensionentravers
de la résistance.
•Toucheraveclasonded’essailespiècesmétalliques
exposées qui présentent une voie de retour au
châssis (antenne, coffret métallique, tête des vis,
arbresdecommandeetdesboutons,écusson,etc.)
et mesurer la chute de tension CA en-travers de la
résistance.
Toutes les vérifications doivent être refaites après
avoir inversé la fiche du cordon d’alimentation. (Si
nécessaire, une prise d’adpatation non polarisée
peut être utilisée dans le but de terminer ces
vérifications.)
Touslescourantsmesurésnedoiventpasdépasser
0,5 mA.
Dans le cas contraire, il y a une possibilité de choc
électriquequidoitêtresuppriméeavantderendrele
récepteur au client.
DVM
ECHELLE CA
1.5k ohm
10W
0.15 F
SONDE D'ESSAI
A
UX PIECES
M
ETALLIQUES
E
XPOSEES
BRANCHER A UN
E
TERRE CONNUE
sont identifiées par la marque "#" et hachurées dans
laliste des piècesde remplacement etles diagrammes
schématiques.
Pour assurer la protection, ces pièces doivent être
identiques à celles utilisées dans le circuit d’origine.
L’utilisation de pièces qui n’ont pas les mêmes
caractéristiques que les pièces recommandées par
l’usine, indiquées dans ce manuel, peut provoquer des
électrocutions, incendies, radiations X ou autres
accidents.
De nombreuses pièces, électriques et mécaniques,
dans les téléviseurs présentent des caractéristiques
spéciales relatives à la sécurité, qui ne sont souvent
pasévidentesàvue.Ledegrédeprotectionnepeutpas
êtrenécessairementaugmentéeenutilisantdespièces
de remplacement étalonnées pour haute tension,
puissance, etc.
Les pièces de remplacement qui présentent ces
caractéristiques sont identifiées dans ce manuel; les
pièces électriques qui présentent ces particularités
AVIS POUR LA SECURITE

3-1 LCV_NOTE
NOTE: CBA AND PWB MEANS PRINTED WIRING
BOARD.
Circuit Board Indications
a. Theoutputpinofthe3pinRegulatorICsisindicated
as shown.
Top View
Out In
Bottom View
Input
b. For other ICs, pin 1 and every fifth pin are indicated
as shown.
5
10
Pin 1
< Bottom View >
c. The 1st pin of every male connector is indicated as
shown.
Pin 1
< Bottom View >
Instructions for Connectors
1. When you connect or disconnect the FFC (Flexible
FoilConnector)cable,besuretofirstdisconnectthe
AC cord.
2. FFC (Flexible Foil Connector) cable should be in-
serted parallel into the connector, not at an angle.
FFC Cable
Connector
CBA
* Be careful to avoid a short circuit.
Precautions for Using Lead-free Solder
1 Employing lead-free solder
Pb free mark (as shown below) indicates lead-free
solder, and is attached on the PWBs and service
manuals. For PWBs with Pb free mark, be sure to use
lead-free solder. For PWB without Pb free mark, use
standard solder. The alphabetical character following
Pb shows the type of lead-free solder.
2 Using lead-free wire solder
WhenfixingthePWBsolderedwiththelead-freesolder,
applylead-freewiresolder.Repairingwithconventional
lead wire solder may cause damage or accident due to
cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is
higherthantheleadwiresolderby40°C,werecommend
you to use a dedicated soldering bit, if you are not
familiar with how to obtain lead-free wire solder or
soldering bit, contact our service station or service
branch in your area.
3 Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is
about220°Cwhichishigherthantheconventionallead
solderby40°C,andasithaspoorsolderwettability,you
may be apt to keep the soldering bit in contact with the
PWB for extended period of time. However, Since the
landmaybepeeledofforthemaximumheat-resistance
temperature of parts may be exceeded, remove the bit
from the PWB as soon as you confirm the steady
soldering condition.
Lead-free solder contains more tin, and the end of the
soldering bit may be easily corroded. Make sure to turn
on and off the power of the bit as required.
If a different type of solder stays on the tip of the
soldering bit, it is alloyed with lead-free solder. Clean
the bit after every use of it.
When the tip of the soldering bit is blackened during
use, file it with steel wool or fine sandpaper.
Be careful when replacing parts with polarity indication
on the PWB silk.
Lead-free wire solder for servicing
STANDARD NOTES FOR SERVICING
Part No. Description Code
ZHNDAi123250E J 0.3mm 250g(1roll) BL
ZHNDAi126500E J 0.6mm 500g(1roll) BK
ZHNDAi12801KE J 1.0mm 1kg(1roll) BM

3-2 LCV_NOTE
How to Remove / Install Flat Pack-IC
1. Removal
With Hot-Air Flat Pack-IC Desoldering Machine:
(1)Prepare the hot-air flat pack-IC desoldering ma-
chine,thenapply hot airtotheFlat Pack-IC (about5
to 6 seconds). (Fig. S-1-1)
Fig. S-1-1
(2)Remove the flat pack-IC with tweezers while apply-
ing the hot air.
(3)Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
(4)Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Caution:
1. Donotsupplyhotairto the chip parts aroundtheflat
pack-IC for over 6 seconds because damage to the
chip parts may occur. Put masking tape around the
flat pack-IC to protect other parts from damage.
(Fig. S-1-2)
2. The flat pack-IC on the CBA is affixed with glue, so
becarefulnottobreakordamagethefoilofeachpin
or the solder lands under the IC when removing it.
Hot-air
Flat Pack-IC
Desoldering
Machine
CBA
Flat Pack-IC
Tweezers
Masking
Tape
Fig. S-1-2
With Soldering Iron:
(1)Using desoldering braid, remove the solder from all
pins of the flat pack-IC. When you use solder flux
whichisappliedtoallpinsoftheflatpack-IC,youcan
remove it easily. (Fig. S-1-3)
Flat Pack-IC Desoldering Braid
Soldering Iron
Fig. S-1-3
(2)Lift each leadofthe flat pack-ICupwardoneby one,
using a sharp pin or wire to which solder will not
adhere(ironwire).Whenheatingthepins,useafine
tip soldering iron or a hot air desoldering machine.
(Fig. S-1-4)
Fine Tip
Soldering Iron
Sharp
Pin
Fig. S-1-4
(3)Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
(4)Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
With Iron Wire:
(1)Using desoldering braid, remove the solder from all
pins of the flat pack-IC. When you use solder flux
whichisappliedtoallpinsoftheflatpack-IC,youcan
remove it easily. (Fig. S-1-3)
(2)Affixthewiretoaworkbenchorsolidmountingpoint,
as shown in Fig. S-1-5.
(3)While heating the pins using a fine tip soldering iron
orhot airblower, pull upthe wireas the solder melts
so as to lift the IC leads from the CBA contact pads
as shown in Fig. S-1-5.

3-3 LCV_NOTE
(4)Bottom of the flat pack-IC is fixed with glue to the
CBA; when removing entire flat pack-IC, first apply
soldering iron to center of the flat pack-IC and heat
up. Then remove (glue will be melted). (Fig. S-1-6)
(5)Release the flat pack-IC from the CBA using twee-
zers. (Fig. S-1-6)
Note:
When using a soldering iron, care must be taken to
ensurethattheflatpack-ICisnotbeingheldbyglue.
When the flat pack-IC is removed from the CBA,
handle it gently because it may be damaged if force
is applied.
To Solid
Mounting Point
Soldering Iron
Iron Wire
or
Hot Air Blower
Fig. S-1-5
Fine Tip
Soldeing Iron
CBA
Flat Pack-IC
Tweezers
Fig. S-1-6
2. Installation
(1)Usingdesolderingbraid,removethesolderfromthe
foilof eachpin ofthe flatpack-IC onthe CBA so you
can install a replacement flat pack-IC more easily.
(2)The“ ”markontheflatpack-ICindicatespin1.(See
Fig. S-1-7.) Be sure this mark matches the 1 on the
PCB when positioning for installation. Then presol-
der the four corners of the flat pack-IC. (See Fig. S-
1-8.)
(3)Solder all pins of the flat pack-IC. Be sure that none
of the pins have solder bridges.
Example :
Pin 1 of the Flat Pack-IC
is indicated by a " " mark. Fig. S-1-7
Presolder
CBA
Flat Pack-IC
Fig. S-1-8

3-4 LCV_NOTE
Instructions for Handling
Semi-conductors
Electrostatic breakdown of the semi-conductors may
occurduetoapotentialdifferencecausedbyelectrostatic
charge during unpacking or repair work.
1. Ground for Human Body
Besuretowearagroundingband(1MΩ)thatisproperly
grounded to remove any static electricity that may be
charged on the body.
2. Ground for Workbench
Besuretoplaceaconductivesheetorcopperplatewith
proper grounding (1MΩ) on the workbench or other
surface, where the semi-conductors are to be placed.
Becausethestaticelectricitychargeonclothingwillnot
escapethrough the body grounding band, be careful to
avoid contacting semi-conductors with your clothing.
CBA
< Incorrect >
CBA
Grounding Band
Conductive Sheet or
Copper Plate
< Correct >

4-1 L0170DC
CABINET DISASSEMBLY INSTRUCTIONS
NOTE: CBA AND PWB MEANS PRINTED WIRING
BOARD.
1. Disassembly Flowchart
This flowchart indicates the disassembly steps to gain
access to item(s) to be serviced. When reassembling,
followthestepsinreverseorder.Bend,route,anddress
the cables as they were originally.
1: Identification (location) No. of parts in the figures
2: Name of the part
3: Figure Number for reference
4: Identification of parts to be removed, unhooked,
unlocked, released, unplugged, unclamped, or de-
soldered.
P=Spring, L=Locking Tab, S=Screw,
CN=Connector,
*=Unhook, Unlock, Release, Unplug, or Desolder
e.g.5(S-1) = five Screws (S-1),
2(L-2) = two Locking Tabs (L-2)
5: Refer to "Reference Notes."
2. Disassembly Method
↑↑↑ ↑ ↑
123 4 5
[1] Rear Cabinet
[2] Main CBA
[3] LCD Main CBA
[5] Function CBA
[4] Liquid Crystal Panel
[6] Speaker L
[8] Front Cabinet
[7] Speaker R
No.
LOC.
ID/
PART
REMOVAL
No.
Fig.
UNPLUG/DESOLDER
UNLOCK/RELEASE/
REMOVE/*UNHOOK/
Not
e
[1] Cabinet
Rear D1 7(S-1), (S-2)-
[2] Main CBA D3
D2
*CN404, *CN104
*CN402, *CN403,
*CN802, *CN401,
*CN103A, *CN801,
*CN101A, *CN102A,
3(S-3), 3(S-4), 2(S-5),
-
[3] CBA
LCD Main D3 D2 *CN311A, *CN321A 4(S-6), *CN310A, -
[4] Panel Crystal
Liquid D3
D2 4(S-7)-
[5] CBA
Function D3 D2 3(S-8)-
[6] Speaker L D3
D2 2(S-9)-
[7] Speaker R D3
D2 2(S-10)-
[8] Cabinet
Front D2 ---------- -

4-2 L0170DC
S-1
S-1
S-1
S-1
S-2
S-1
[1] Rear Cabinet
Fig. D1

4-3 L0170DC
Fig. D2
S-3
S-3
S-4
S-4
S-5
S-6
S-6
S-7
S-7
S-8
S-9
S-10
[2] Main CBA
[3] LCD Main CBA
[4] Liquid Crystal
Panel
[7] Speaker R
[6] Speaker L
[8] Front Cabinet
[5] Function
CBA

4-4 L0170DC
Fig. D3
To Speaker To Speaker
CN802
CN801
CN404
CN403
CN402
CN401
CN104
CLN104
CN103A
CN113B CN112B
CN321A CN310A CN311A
CN111B
CN102A CN101A
Main CBA
Function CBA
LCD Main CBA
To Liquid
Cristal Panel
To Liquid Cristal Panel

5-1 L0170EA
NOTE: CBA AND PWB MEANS PRINTED WIRING
BOARD.
NOTE:
Electricaladjustmentsarerequiredafterreplacingcircuit
componentsandcertainmechanicalparts.Itisimportant
to perform these adjustments only after all repairs and
replacements have been completed.
Also, do not attempt these adjustments unless the
proper equipment is available.
Test Equipment Required
1. NTSC Pattern Generator (Color Bar W/White Win-
dow, Red Color, Dot Pattern, Gray Scale,
Monoscope, Multi-Burst)
2. Remote control unit (attached remote control unit)
LCDTV
123
4 78
0
9
100
56
3. Color Analyzer
4. DC Voltmeter
How to set up the service mode:
Service mode:
1. Turnthepoweron.(UsemainpowerontheTVunit.)
2. In standby mode, simultaneously press “POWER”
button and “MENU” button on the TV unit. Version
ofmicrocomputerwilldisplayontheLCDordisplay.
(Ex: 0001AGP-0.11, 0002AGP-0.14 or 0003AGP-
0.17)
ELECTRICAL ADJUSTMENT INSTRUCTIONS
1. Initial Setting
General
Enter the Service mode.
Set the each initial data as shown on table 1 below.
Table 1: Initial Data
ITEM (on the service
remote control)
BUTTON
VALUE
DATA
BRT
MENU 1
126
CNT 198
CLR-R 72
CLR-B 72
TNT 56
V-TNT 65
SHR 28
S-BRT
MENU 2
126
S-CNT 198
S-CLR-R 72
S-CLR-B 72
S-TNT 65
S-SHR 28
C-BRT
MENU 3
126
C-CNT 198
C-CLR-R 67
C-CLR-B 72
C-TNT 72
C-SHR 28
SAIDO 5143
C-SAIDO 143
NORMAL 074
DARK 150
COR(C/D1)Vol down 1 512
COG(C/D1)Vol down 2 512
COB(C/D1)Vol down 3 512
DR(C/D1)Vol down 4 130
DG(C/D1)Vol down 5 132
DB(C/D1)Vol down 6 116
C-COR(C/D2)Vol down 1 512
C-COG(C/D2)Vol down 2 512
C-COB(C/D2)Vol down 3 512
C-DR(C/D2)Vol down 4 130

5-2 L0170EA
ITEM (on the service
remote control)
BUTTON
VALUE
DATA
C-DG(C/D2)Vol down 5 127
C-DB(C/D2)Vol down 6 131
7F
Vol down
FF
LANGUAGE SPA/FRA
STEREOTYP MTS
ACCESSCODE ON
BLACKLIGHT ON
HD OFF
HRD OFF
NCM OFF
ASPECT OFF
3. Flicker Adjustment
Note: Use remote control unit
1. Enter the Service mode. (See page 5-1)
2. Press “2” button on the remote control unit. T h e
following screen appears.
3. IfFlickerAdjustmentisnotfit,thescreenbecomethe
following.
FLASH
(Go and Off)
4. Press “CH o/p” buttons on the remote control unit
until flash stops.
4. TV Reset to Default
To reset software, press “5” button on the remote
control unit for at least 5 seconds after pressing
“FLASHBACK” button on the remote control unit.
2. +B Adjustment
Purpose: To obtain correct operation.
Symptom of Misadjustment: The picture is dark and
the unit does not operate correctly.
Test point Adj. Point Mode Input
TP401(B+)
TP300(GND)
M. EQ. Spec.
DC Voltmeter
--- ---
+13.0±0.5V DC.
VR601
Note: TP401, TP300(GND), VR601 --- Main CBA
1. ConnectDCVoltMetertoTP401andTP300(GND).
2. AdjustVR601sothatthevoltageofTP401becomes
+13.0±0.5V DC.

5-3 L0170EA
Thefollowingadjustmentnormallyarenotattempted
inthefield.OnlywhenreplacingtheLCDPanelthen
adjust as a preparation.
5. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Method 1
Vary the “RCUTOFF”, “BCUTOFF”, “RGAIN” and
“BGAIN” settings of the adjustment process below.
Adjustment Process
RCUTOFF
GCUTOFF
BCUTOFF
R-GAIN
G-GAIN
B-GAIN
0
0
0
0
0
0
Red cut - off adjustment
Green cut - off adjustment
Blue cut - off adjustment
White balance
White balance
White balance
1. Receive the black signal (white 40%).
Adjust the “RCUTOFF” and “BCUTOFF” settings to
have the black color temperature as specified.
2. Receive the white 80% signal.
Adjusttwoofthe“R-GAIN”,“G-GAIN”and“B-GAIN”
settings in the decreasing direction to be visible
white.
Note: Make sure at least one of the “R-GAIN”, “G-
GAIN” and “B-GAIN” settings is “0”.
3. Check to see if the black and white color tempera-
turesare as specified.Ifnot, repeat theabove steps
1 and 2.
Method 2
Test point Adj. Point Mode Input
Screen
M. EQ. Spec.
Pattern Generator,
Color analyzer
x (0.282 to 0.302)
y (0.297 to 0.317)
Figure
VIDEO 1
VIDEO 2
White Purity
(APL 80%
and 40%)
APL
80%
x (0.276 to 0.296)
y (0.289 to 0.309)
APL
40%
Color Analyzer
It carries out in a darkroom.
L = 50 cm
Perpendicularity
INPUT: WHITE 80%
Fig. 2
CH
buttons
Note: Use remote control unit
1. Operate the unit for more than 20 minutes.
2. Input the White Purity (APL 80%).
3. Set the color analyzer to the CHROMA mode and
bring the optical receptor to the center on the LCD-
Panel surface after zero point calibration as shown
above.
Note: The optical receptor must be set perpendicu-
larly to the LCD Panel surface.
4. Enter the Service mode. Press “VOL p” button on
the remote control unit and select “C/D” mode.
5. When “x” value and “y” value are not within specifi-
cation, adjust “DB” or “DR”. Refer to “1. Initial Set-
ting.”
6. Input the White Purity (APL 40%).
7. Press“VOLp”buttonontheremotecontrolunitand
select “C/D” mode.
8. When “x” value and “y” value are not within specifi-
cation, adjust “COB” or “COR”. Refer to “1. Initial
Setting.”
9. Also VIDEO 2 mode.

5-4 L0170EA
6. Sub-Brightness Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Confirmation at [VIDEO-1]
1. Set CG951 to 7/5/3 IRE 3-step grayscale.
TEST PATTERN (7/5/3 IRE)
7 IRE 5 IRE 3 IRE
2. Apply CG951 video signal to VIDEO1 input.
3. Enter the Service mode.
4. Make sure that contrast and brightness controls are
set to initial position.
5. Confirm “5 IRE” position was biginning to bright.
6. If “5 IRE” position was bigining to bright, no need to
adjust.
7. If “5 IRE” position is not avilable or to be highly
brightness,thenadjustthefollowingvaluesbyusing
remote control unit. Refer to “1. Initial Setting.”
RF/VIDEO1: BRT
VIDEO2: C-BRT
Confirmation at [VIDEO-2]
1. Set CG951 to 7/5/3 IRE 3-step grayscale.
2. Apply CG951 video signal to “Y” input.
3. Enter the Service mode.
4. Make sure that contrast and brightness controls are
set to initial position.
5. Confirm “5 IRE” position was beginning to bright.
6. If “5 IRE” position was beginning to bright, no need
to adjust.
7. If “5 IRE” position is not available or to be highly
brightness,thenadjustthefollowingvaluesbyusing
remote control unit. Refer to “1. Initial Setting.”
RF/VIDEO1: BRT
VIDEO2: C-BRT

6-1 L0370TS
TROUBLESHOOTING
Table of Contents for the Troubleshooting Flow Charts
No.
Chart
Flow Description Page
1 The power cannot be turned on. 6-2
2 The fuse blows out. 6-2
3 When the output voltage fluctuates. 6-2
4 When buzz sound can be heard in the vicinity of power circuit. 6-2
5 AL-8V is not outputted. 6-2
6 AL+3.3V is not outputted. 6-3
7 AL+40V is not outputted. 6-3
8 AL+5V is not outputted. 6-3
9 AL+33V is not outputted. 6-3
10 AL+12V is not outputted. 6-3
11 REG+5V(1) is not outputted. 6-4
12 REG+5V(2) is not outputted. 6-4
13 P-ON+3.3V(D) is not outputted. 6-4
14 P-ON+3.3V(A) is not outputted. 6-4
15 P-ON+1.8V(D) is not outputted. 6-4
16 PANEL+24V is not outputted. 6-5
17 PANEL+5.4V is not outputted. 6-5
18 PANEL-12V is not outputted. 6-5
19 PANEL+12V is not outputted. 6-5
20 PANEL+9V is not outputted. 6-5
21 The key operation is not functioning. 6-6
22 No operation is possible from the remote control unit. 6-6
23
Picture does not appear normally. (Tuner input / Video input/S-Video input.) 6-7
24 Picture does not appear normally.(Y / Pb / Pr input.)6-7
25 Audio is not outputted normally.(Tuner input.)6-8
26 Audio is not outputted normally.(Audio input terminals.)6-8
NOTE: CBA AND PWB MEANS PRINTED WIRING
BOARD.