Toshiba 32WL66Z User manual

SERVICE MANUAL
Color Television
32WL66Z Ver.1
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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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.
1.
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

3.Ifthepanelsurface becomes soiled, wipe with cotton ora softcloth. Ifthis doesnot
remove the soiling, breatheon the surface and then wipe again.
Ifthepanelsurface is extremely solied, use aCRT cleaneras a cleaner. Wipe offthe
panelsurface by drop the cleaneron thecloth. Do notdrop the cleaneron thepanel.
Pay attention notto scratch the panelsurface.
4.Leaving waterorotherfluids on the panelscreen foran extended period oftimecan
resultin discolorationorstripes. Immediately remove any type offluid fromthe screen.
5.Glass is used in the panel, so do notdrop orstrikewith hard objects. Such actions can
damage the panel.
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Handling theLCD Module

6.CMOS-LSIcircuitry is used in the LCDmodule, so avoid damage dueto static
electricity. When handling the module, use a wristground oranchorground.
7.Do notexpose theLCD module to directsunlightorstrongultravioletrays foran
extended periodoftime.
8.Do notstore the LCDmodule belowthe temperature conditions described in the
specifications. Failure to do so could resultin freezing ofthe liquid crystaldue to cold
airorlossofresilience orotherdamage.
9.Do notdisassemble theLCDmodule. Such actionscould resultin improperoperation.
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Handling theLCD Module

10.When transporting the LCDmodule, do notuse packing containing epoxy resin
(amine)orsilicon resin (alcoholoroxim). The gas generated by these materialscan
cause loss ofpolarity.
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Handling theLCD Module

PCB LAYOUT
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RF
N
o
n
6
5
6
Y
C
b
C
r
1
6
b
i
t
B
t
6
0
1
8
B
i
t
H
D
,
V
D
,
C
L
K
U
A
R
T
R
E
Q
HDMI
CORTEZ Plus
Analog
Front
End
(16port)
Video
Decoder
MUX
VBIData
Processor
DCDi
MADi
Scaling
BEP
OSD
LVD
S
Micro-
processor
IRI/F AD
C
GPI
O
Digital
InputA
Digital
InputB
2nd
Channel
Process
Cortez
Regulator
EEPROM
DDRRAM
FLASHROM
I
2
C
I
2
C
SIGNALBOARD
I
2
C
FLI8538
Input
Terminal
(Video)
CVBS
S-VIDEO
YCbCr
PCIN
+LowB
POWERBOARD
SoundAMP
ACINPUT&
Power
AVBOARD
TIF
PANEL
PANELI/F
Standby
uCON
HDMI
MTS+
APRO
MSP
PLL
VOC
SPEAKER
DACAMP
HP_AMP
Headphone
Input
Terminal
(Audio)
CVBS(L/R)
S-VIDEO(L/R)
YCbCr(L/R)
PC_IN(L/R) SW

SCHEMATIC DIAGRAM
Precaution
Note:
1.RESISTOR
Resistance isshownin ohm[K=1,000, M=1,000,000]. Allresistors are 1/6 W and 5 %
tolerance carbon resistor, unless otherwisenoted as thefollowing marks.
2.CAPACITOR
Unless otherwise noted in schematic, allcapacitorvalues less than 1 areexpressed in
µF, and thevalues more than 1 in pF.
WARNING: BEFORESERVICINGTHISCHASSIS,READ THE "X-RAY
RADIATIONPRECAUTION"FORDIRECTVIEWCTVONLY,"SAFETY
PRECAUTION"AND"PRODUCTSAFETYNOTICE"OFTHISMANUAL.
CAUTION:Theinternationalhazard symbols" "intheschematicdiagram
and the partslistdesignatecomponentswhichhave specialcharacteristics
importantfor safetyand
shouldbe replaced onlywithtypesidenticaltothose inthe originalcircuit
or specified inthepartslist.
The mountingpositionofreplacementsistobe identicalwithoriginals.
Before replacinganyof thesecomponents,read carefullytheSAFETY
PRECAUTIONand PRODUCTSAFETYNOTICE.
Donot degrade thesafetyofthe receiverthrough improper servicing.
1/2R
:
MetalorMetaloxide of1/2 watt
1/2S
:
Carbon composition of1/2 watt
1RF
:
Fuse resistorof1 watt
10 W
:
Cementof10 watt
K
:
±10 %
G
:
±2 %
F
:
±1 %
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Allcapacitors are ceramic 50 V, unless otherwisenoted as thefollowing marks.
3.The parts indicated with " "have specialcharacteristics, and should bereplaced with
identicalparts only.
4.Voltages read with DIGITAL MULTI-METERfrompointindicated to chassis ground,
using a colorbarsignalwith allcontrols atnormal, line voltage atnominalACvolts.
5.Waveforms are taken receiving colorbarsignalwith enough sensitivity.
6.Voltage readingshown are nominalvalues and may vary ±20 %exceptH.V.
=
Electrolytic capacitor
= Mylarcapacitor
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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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