Daewoo DTQ-29S2FCC User manual

Service Manual
Color Television
CHASSIS : CN-013
Model :
DTQ-29S2FCC
DTQ-26S2FCC
S/M No. :TCN013AEF0
Feb. 2002.
U.S.A
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
DTQ-26S2FCC / DTQ-29S2FCC
TV STANDARD
POWER INPUT
POWER CONSUMPTION
TUNING SYSTEM
SOUND OUTPUT
SPEAKER
ANTENNA INPUT
IMPEDANCE
AUXILIARY
INPUT TERMINAL
INTERMEDIATE
FREQUENCIES
REMOTE CONTROL
TUNING RANGES
SPECIAL FUNCTIONS
ITEMS
MODEL
NTSC-M
AC 120V 60Hz
97W 95W
Frequency Synthesizer(FS)Tuning System
VHF:2~13(12)
UHF:14~69(65)
CATV:1~125(125)
1.6W x 1.6W x 0.5W
3W 8ohm
75ohm Unbalanced
Front : Video, Audio
Rear:Video
(In/Out : MTI, Out :Matrix speaker)
, Audio
Picture IF Carrier Frequency :45.75MHz
Sound IF Carrier Frequency :41.25MHz
Color Sub-Carrier Frequency :42.17MHz
R-43A01
3-Language OSD
With CAPTION
Wake-up On/Off Time
Sleep Timer
Power Restore
SPECIFICATIONS
DTQ-26S2FCCDTQ-29S2FCC
✔ Caution
: In this Manual, some parts can be changed for improving, their
performance without notice in the parts list. So, if you need the
latest parts information,please refer to PPL(Parts Price List) in
Service Information Center (http://svc.dwe.co.kr).

1
TABLE OF CONTENTS
SAFETY INSTRUCTION................................................................................................... 2
SPECIFICATIONS ......................................................................................................... 4
CIRCUIT BLOCK DIAGRAM .......................................................................................... 5
ALIGNMENT INSTRUCTIONS.......................................................................................... 6
1. SERVICE MODE ADJUSTMENTS........................................................................................................ 6
2. ASSEMBLY ADJUSTMENTS................................................................................................................ 7
SCHEMATIC DIAGRAM................................................................................................ 11
EXPLODED VIEW......................................................................................................... 12
PRINTED CIRCUIT BOARD............................................................................................. 14
SERVICE PARTS LIST ..................................................................................................... 15
1. DIFFERENT PARTS LIST ..................................................................................................................... 22
IC DESCRIPTION......................................................................................................... 1
TROUBLE SHOOTING CHARTS ...................................................................................... 13
APPENDIX ( Appendix is provided only by internet [http://svc.dwe.co.kr] )

2
PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS
CAUTION:Donotattempttomodifythisproductinanyway.Unau-
thorizedmodificationswillnotonlyvoidthewarranty,butmayleadto
yourbeingliableforanyresultingpropertydamageoruserinjury.
Serviceworkshouldbeperformedonlyafteryouarethoroughly
familiarwithallofthefollowingsafetychecksandservicingguide-
lines.Todootherwise,increasestheriskofpotentialhazardsand
injurytotheuser.
SAFETY CHECKS
Aftertheoriginalserviceproblemhasbeencorrected,acheckshould
bemadeofthefollowing:
SUBJECT : FIRE & SHOCK HAZARD
1.Besurethatallcomponentsarepositionedinsuchawayasto
avoidpossibilityofadjacentcomponentshorts.Thisisespecially
importantonthosechassiswhicharetransportedtoandfromthe
repairshop.
2.Neverreleasearepairunlessallprotectivedevicessuchasinsula-
tors,barriers,covers,shields,strainreliefs,andotherhardware
havebeenreinstalledperoriginaldesign.
3.Solderingmustbeinspectedtodiscoverpossiblecoldsolderjoints,
frayedleads,damagedinsulation(includingA.C.cord),solder
splashesorsharpsolderpoints.Becertaintoremoveallloosefor-
eignparticals.
4.Checkforphysicalevidenceofdamageordeteriorationtoparts
andcomponents,andreplaceifnecessaryfolloworiginallayout,
leadlengthanddress.
5.Noleadsorcomponentsshouldtouchareceivingtubeoraresistor
ratedat1wattormore.Leadtensionaroundprotrudingmetalsur-
facesmustbeavoided.
6.Allcriticalcomponentssuchasfuses,flameproofresistors,capaci-
tors,etc.mustbereplacedwithexactfactorytypes.Donotuse
replacementcomponentsotherthanthosespecifiedormake
unrecommendedcircuitmodifications.
7.Afterre-assemblyofthesetalwaysperformanA.C.leakagetest
onallexposedmetallicpartsofthecabinet,(thechannelselector
knob,antennaterminals,handleandscrews)tobesurethesetis
safetooperatewithoutdangerofelectricalshock.Donotusea
lineisolationtransformerduringthistest.UseanA.C.voltmeter,
having5000ohmspervoltormoresensitivity,inthefollowing
manner:connecta1500ohm10wattresistor,paralleledbya15
mfd.150VA.C.typecapacitorbetweenaknowngoodearth
ground(9waterpipe,conduit,etc.)andtheexposedmetallicparts,
oneatatime.MeasuretheA.C.voltageacrossthecombinationof
1500ohmresistorand0.15MFDcapacitor.ReversetheA.C.plug
andrepeatA.C.voltagemeasurementsforeachexposedmetallic
part.Voltagemeasuredmustnotexceed0.75voltsR.M.S.This
correspondsto0.5milliampA.C.Anyvalueexceedingthislimit
constitutesapotentialshockhazardandmustbecorrectedimme-
diately.
GRAPHIC SYMBOLS :
Thelightningflashwitharrowheadsymbol,
withinanequilateraltriangle,isintendedtoalert
theservicepersonneltothepresenceofuninsu-
lated“dangerousvoltage”thatmaybeofsuffi-
cientymagnitudetoconstituteariskofelectric
shock.
Theexclamationpointwithinanequilateraltri-
angleisintendedtoalerttheservicepersonnel
tothepresenceofimportantsafetyinformation
inserviceliterature.
Fusesymbolisprintedonpcbadjacenttothe
fuse,with“RISKOFFIREREPLACEFUSEAS
MARKED”.Thesymbolisexplainedintheser-
vicemanualwiththefollowingwordingorequiv-
alent.
“CAUTION : FORCONTINUEDPROTECTIONAGAINSTFIRE
HAZARD,REPLACEONLYWITHSAMETYPE(5A,125V)”and
“ ATTENTION :AFIND’ASSUUNEPROTECTIONPERMANENTE
CONTRELESRISQUESD’INCENDIE,REMPLACERUNIQUE-
MENTPARUNFUSIBLEDEMEMETYPEETDE”5A,125V”.
SUBJECT : X-RADIATION
1.Besureproceduresandinstructionstoallservicepersonnelcover
thesubjectofX-raysincurrentT.V.receiversisthepicturetube.
However,thistubedoesnotemitX-rayswhenthehighvoltageis
atthefactoryspecifiedlevel.Thepropervalueisgivenintheappli-
cableschematic.Operationathighervoltagesmaycauseafailure
ofthepicturetubeorhighvoltagesupplyand,undercertaincir-
cumstances,mayproduceradiationinexcessofdesirablelevels.
2.OnlyfactoryspecifiedC.R.T.anodeconnectorsmustbeused.
DegaussingshieldsalsoserveasX-rayshieldincolorsets.
Alwaysre-installthem.
3.Itisessentialthattheservicemanhasavailableanaccurateand
reliablehighvoltagemeter.Thecalibrationofthemetershouldbe
checkedperio-dicallyagainstareferencestandard.Suchasthe
oneavailableatyourdistributor.
4.Whenthehighvoltagecircuitryisoperatingproperlythereisno
possibilityofanX-radiationproblem.Everytimeacolorchassisis
serviced,thebrightnessshouldberunupanddownwhilemonitor-
ingthehighvoltagewithametertobecertainthatthehighvoltage
doesnotexceedthespecifiedvalueandthatitisregulatingcor-
rectly.Wesuggestthatyouandyourserviceorganizationreview
testproceduressothatvoltageregulationisalwayscheckedasa
standardservicingprocedure.Andthatthehighvoltagereadingbe
recordedoneachcustomer’sinvoice.
5.Whentroubleshootingandmakingtestmeasurementsinareceiver
withaproblemofexcessivehighvoltage,avoidbeingunnecessarily
closetothepicturetubeandthehighvoltagecompartment.
Donotoperatethechassislongerthanisnecessarytolocatethe
causeofexcessivevoltage.
6.RefertoHV,B+andShutdownadjustmentproceduresdescribedin
theappropriateschematicanddiagrams(whereused).
10WATT
Good earth ground,
such as the water
pipe, conduit, etc. 1500 OHM
A.C. VOLTMETER
Place this probe
on each exposed
metal part.
0.15 uF

3
SUBJECT : IMPLOSION
1.Alldirectviewedpicturetubesareequippedwithanintegralimplo-
sionprotectionsystem,butcareshouldbetakentoavoiddamage
duringinstallation.Avoidscratchingthetube.Ifscratched,replace
it.2.Useonlyrecommendedfactoryreplacementtubes.
SUBJECT : TIPS ON PROPER INSTALLATION
1.Neverinstallanyreceiverinclosed-inrecess,cubbyholeorclosely
fittingshelfspaceover,orclosetoheatduct,orinthepathof
heatedairflow.
2.Avoidconditionsofhighhumiditysuchas:Outdoorpatioinstalla-
tionswheredewisafactor.Nearsteamradiatorswheresteam
leakageisafactor,etc.
3.Avoidplacementwheredraperiesmayobstructrearventing.The
customershouldalsoavoidtheuseofdecorativescarvesorother
coveringswhichmightobstructventilation.
4.Wallandshelfmountedinstallationsusingacommercialmounting
kit,mustfollowthefactoryapprovedmountinginstructions.A
receivermountedtoashelforplatformmustretainitsoriginal
feet(ortheequivalentthicknessinspacers)toprovideadequate
areflowacrossthebottom,boltsorscrewsusedforfasteners
mustnottouchandpartsorwiring.Performleakagetestoncus-
tomizedinstallations.
5.Cautioncustomersagainstthemountingofareceiveronsloping
shelforatiltedposition,unlessthereceiverisproperlysecured.
6.Areceiveronaroll-aboutcartshouldbestableonitsmountingto
thecart.Cautionthecustomeronthehazardsoftryingtorollacart
withsmallcastersacrossthresholdsordeeppilecarpets.
7.Cautioncustomersagainsttheuseofacartorstandwhichhasnot
beenlistedbyunderwriterslaboratories,inc.Forusewiththeir
specificmodeloftelevisionreceiverorgenericallyapprovedfor
usewithT.V.’softhesameorlargerscreensize.

SPECIFICATIONS
MODE DTQ-29S2FCC DTQ-26S2FCC REMARKS
ITEMS
TV STANDARD NTSC-M
POWER INPUT AC120V 60Hz
POWER CONSUMPTION 97W 95W
TUNNING SYSTEM Frequency Synthesizer (FS) Tuning System
VHF : 2 ~ 13 (12)
TUNING RANGES UHF : 14 ~ (56)
CATV : 1 ~ 125 (125)
SOUND OUTPUT 1.6W X 1.6W X 0.5W
SPEAKER 3W 8 ohm
ANTENNA INPUT 75 ohm Unbalanced
IMPEDANCE
AUXILARY Front : Video, Audio
INPUT TERMINAL Rear : Video, Audio
(In/Out : M.T.I, Out : Matrix Speaker)
INTERMEDIATE Picture IF Carrier Frequency : 45.75 MHz
FREQUENCIES Sound IF Carrier Frequency : 41.25 MHz
Color Sub-Carrier Frequency : 42.17 MHz
REMOTE CONTROL R-43A01
3-Language OSD
With CAPTION
SPECIAL FUNCTIONS Wake-up On/Off Time
Sleep Timer
Power Restore
4

A/V IN 1 A/V IN 2
RF 5V 33V
TUNER
DT5 -NF20F
SAW
FILTER
VIDEO S/W IC
TA7347P
MAIN IC
DCT814B
MICOM
LC863240
M.T.I.
(Multi
Television
Protocol
Interface)
IR
9V
POWER IC
STR-F6626
5V
9V SOUND
AMP
TDA7267
A
14V
SOUND IC
MSP3420G
SCL SDA
TRAP
IF DET.
OUT
BPF
j
k
SMPS TRANS
TSM-4242B5
HYBRID IC
SW1~6
EEPROM
5V
VERTICAL
LA7845
HOR.OUT
2SD2578
DEFLECTION YOKE
FBT
X-RAY
KTC-3229
200V
10V
27V
j
k
CONTROL
SOUND SCL SOUND SDA
SCL
SDA
SCL
SDA
CLOCK
SCL
RGB
SCREENFOCUS H.V
MATRIX SPEAKER OUT
SPEAKER OUT
12V
132V
14V
45V
OSD RGB RGB
KTC-3229
KTC-3229
SDA
5V
9V
HEATER
OCP
DATA IN DATA OUT
5
CIRCUIT BLOCK DIAGRAM

6
ALIGNMENT INSTRUCTIONS
1. SERVICE MODE ADJUSTMENTS
Follow the steps below whenever service adjustment is required. See Table- A and Table- B to determine if
service adjustments are required.
1) How to enter the service mode using the user remote control.
• Turn the set on.
• Direct the remote control to the reception window of TV.
• Push buttons of remote control in sequence as follows.
1 → MUTE → DISPLAY → MUTE
• Then, the screen will appear as follows.
• Using the channel up or channel down button, select the item you wish to adjust.
(The color of selected item turns into the red.)
• Press the volume up or down button to enter in the service mode you wish to adjust.
2) How to memorize the adjusted values in the service mode.
• Must press DISPLAY button the state which the screen is displaying each of service menus
after all adjustments are completed each of all service menu.
Table-A : Adjust the values of service mode when a part is replaced.
PART
REPLACED
ADJUSTMENT NOTES
NECESSARY UNNECESSARY
I701
(U-COM) OData is stored in I703.
I101
(MAIN) O
I703
(EEPROM) O
Initial setting values are written from I701.
Adjusting Items
CRT OAdjust items related to picture tube only.(White Balance adjustment)
S2 SCRN
S5 IFC
S6 GEO
S8 W/B
S9 DP
S12 FACT
S7 PTRN NORMAL
S5 RFAGCD
S6 H.PHASE/V.POSI/V.SIZE
S8 RD/BD/RB/GB/BB
S9 Subbrightness

7
ALIGNMENT INSTRUCTIONS
Table-B
* indicates the items with different settings each of sets
2. ASSEMBLY ADJUSTMENTS
1) SCREEN ADJUSTMENT (S2)
• Enter the service mode and select service adjustment S2.
• You can see the one horizontal line on the screen.
• Adjust the Screen Control Volume (located on FBT) so that the horizontal line onscreen may be
disappeared.
• Press the volume up or down button to exit in the screen adjustment mode.
MODE ADJUSTMENT ITEMS DATA REMARKS
INITIAL RANGE
S2 Screen Adjustment - -
S5
Auto RF AGC - -
Video Level (VIDEOL) 70 ~ 7 Must be set to 7
RF AGC Delay (RFAGCD) *0 ~ 63 Align RF AGC threshold
FM Level (FM.LEV) 20 0 ~ 31 Must be set to 20
AGC Point 3.75 -Select AGC reference voltage
A/DVALUE - -
S6
Horizontal Phase(H.PHASE) *0 ~ 31 Align sync to flyback pulse, using internal cross pattern(S7)
Vertical Position (V.POSI) *0 ~ 63 Align vertical DC bias, using internal cross pattern(S7)
Vertical Size (V.SIZE) *0 ~ 127 Align vertical amplitude, using internal cross pattern(S7)
NO SD POWER OFF YES -Automatically turn off in 15min for no received signal.
Vertical S-Correction (V SC) 30 ~ 31 Must be set to 6
Vertical Linearity (V LIN) 23 0 ~ 31 Must be set to 16
S7
Internal Black - - Display internal BLACK pattern
Internal 100% White - - Display internal 100% WHITE
Internal 60% White - - Display internal 60% WHITE
Internal Cross Pattern - - Display internal CROSS pattern
S8
Red Drive (RD) *0 ~ 127 Align RED OUT AC level
Green Drive (GD) 10 0 ~ 15 Must be set to 10
Blue Drive (BD) *0 ~ 127 Align BLUE OUT AC level
Red Bias (RB) *0 ~ 255 Align RED OUT DC level
Green Bias (GB) *0 ~ 255 Align GREEN OUT DC level
Blue Bias (BB) *0 ~ 255 Align BLUE OUT DC level
S9
Subbrightness *0 ~ 127 Align common RGB DC level
Contrast 27 0 ~ 27
Tint 27 0 ~ 27
Color 15 0 ~ 27
S12 Forwarding Mode -Factory Initialization
INTHESCREEN ADJUSTMENT MODE, DONT PRESS OTHERBUTTONSEXCEPTVOLUME UP OR DOWN BUTTON.
NOTE

8
2) FOCUS ADJUSTMENT
• TurninalocalstationandadjusttheFocusControlknob(locatedonFBT)forbestpicture
detailsathighlightcondition.
3) RF AGC DELAY ADJUSTMENT (S5)
• Receiveagoodlocalchannel.
• EntertheservicemodeandselectserviceadjustmentS5.
• YoucanseetheOSDasshowninbelow.
• SelectRFAGCDitem,pressthevolumeupordownbuttonuntilnoiseorbeatinpicturedisappears.
• PresstheDISPLAYbuttontomemorizethedata.
4) GEOMETRIC ADJUSTMENTS (S6)
• EntertheservicemodeandselectserviceadjustmentS7.
• Wheneveryouselectthe“S7”usingthevolumeupordownbutton,thescreenischanginglikethis.
• Usingthevolumeupordownbutton,selectinternalcrosspattern.
• SelectserviceadjustmentS6
• YoucanseetheOSDasshowninbelow.
4-1. Horizontal Position Adjustment
• SelectH.PHASEitem,adjustH.PHASEdatavaluetoobtainproperhorizontalcenteringofthe
internalcrosspatternattheleftandrightofthescreen.
4-2. Vertical Position Adjustment
• SelectV.POSIitem,adjustV.POSIdatavaluetocentertherasterproperlyonthescreen.
ALIGNMENT INSTRUCTIONS
IF CONTROL
AUTORFAGC START
VIDEOL 7
RFAGCD 10
FM.LEV 20
AGCPOINT 3.75
A/DVALUE:8DH
MOVE ADJUSTRECALL:SET
GEOMETRY
H.PHASE20
V.POSI29
V.SIZE70
NOSDPOWEROFFYES
VSC3
VLIN23
MOVE ADJUSTRECALL:SET
NORMAL BLACK WHITE100 WHITE60 CROSS

9
ALIGNMENT INSTRUCTIONS
4-3. Vertical Size Adjustment
• Select“V.SIZE”item,adjust“V.SIZE”datavaluetoproperverticalsizeasfollows.
5) WHITE BALANCE ADJUSTMENT(S8)
• Receiveagoodlocalchannel.
• EntertheservicemodeandselectserviceadjustmentS8.
• YoucanseetheOSDasshowninbelow.
• Usingvolumeuporvolumedown,adjustserviceadjustmentdataofRD/GD/BDandRB/GB/BBuntilagoodgray
scalewithnormalwhitesisobtained.ALIGNMENTINSTRUCTIONS
• PresstheDISPLAYbuttontomemorizethedata.
6) DIGITAL PRESET(D.P) ADJUSTMENTS(S9)
SUBBRIGHTNESS ADJUSTMENT
• Receiveagoodlocalchannel.
• EntertheservicemodeandselectserviceadjustmentS9.
• YoucanseetheOSDasshowninbelow.
RD 58
GD 10
BD 65
RB 105
GB 160
BB 100
MOVE ADJUSTRECALL:SET
D.P.SUBBRIGHTNESS 64
CONTRAST 27
TINT 27
COLOR 15
MOVE ADJUSTRECALL:SET