Daewoo DTJ-28G8F Bedienungsanleitung

Service Manual

66 Cm STEREO Colour Television

CHASSIS : CP-810

DAEWOO ELECTRONICS CO., LTD.

http://svc.dwe.co.kr MAR,2000

MODEL : DTJ - 28A6F

DTJ - 28A7F

DTJ - 28B1F

DTJ - 28G6F

DTJ - 28G7F

DTJ - 28G8F

S/M No: CP810P-010

TABLE OF CONTENTS

1. Safety Instruction ........................................................................................................................ 2

2. Specifications .............................................................................................................................. 3

3. Circuit block Diagram ................................................................................................................. 5

4. Alignment Instructions ............................................................................................................... 6

5. IC Description .............................................................................................................................. 12

6. IC DC Voltage Charts ..................................................................................................................32

7. Service Parts List/Recommendable Spare Parts List .............................................................. 35

8. Mechanical Exploded View......................................................................................................... 45

9. Printed Circuit Board ..................................................................................................................51

10. Schematic Diagram ..................................................................................................................... 52

1. Safety Instruction

WARNING

:Onlycompetentservicepersonnelmaycarryoutworkinvolvingthetestingorrepairofthisequipment

1.Excessivehighvoltagecanprodecepotentiallyhaz-

ardousX-RAYRADIATION.Toavoidsuchhazards,

thehigh voltage must not exceed the specified limit.

Thenominalvalueofthehighvoltageofthisreceiveris

23-24kvatmax beam current.Thehigh voltagemust

not,underanycircumstances,exceed 30kv.

Eachtimeareceiverrequire servicing,thehigh volt-

ageshouldbechecked.Itisimprortanttouseanaccu-

rateandreliablehighvoltagemeter.

2.TheonlysourceofX-RAYRadiationinthisTVreceiver

isthepicturetube.ForcontinuedX-RAY RADIATION

protection, the replacement tube must be exactly the

sametype tube as specified in the partslist.

X-RAY RADIATION PRECAUTION

1.Potentialsofhighvoltagearepresentwhenthis

receiverisoperating.Operationofthereceiveroutside

thecabinetor withthe backboard removedinvolvesa

shockhazardfromthereceiver.

1)Servicingshouldnotbeattemptedbyanyonewhois

notthoroughlyfamiliarwiththeprecautionsneces-

sarywhenworkingonhigh-voltage equipment.

2)Dischangethehigh potentialof thepicture tube

beforehandlingthetube.Thepicturetubeishighly

evacuated andifbroken, glassfragmentswill be

violently expelled.

2.IfanyFuseinthisTVreceiverisblown,replaceitwith

theFUSEspecifiedin theReplacementParts List.

3.Whenreplacingahighwattage resistor(oxidemetal

filmresistor)in circuitboard,keepthe resistor10mm

awayfrom circuit board.

4.Keepwiresawayfromhighvoltageorhightempera-

turecomponents.

5.ThisreceivermustoperateunderAC230volts,50Hz.

NEVERconnect to DC supply or any other power or

frequency.

SAFETYPRECAUTION

Manyelectricaland mechanicalparts inthis have

specialsafety-related characteristics. Thesecharac-

teristicsareoftenpassedunnoticedbyavisual

inspectionandtheX-RAYRADIATIONprotection

affordedbythemcannotnecessarilybeobtainedby

usingreplacement components rated for higher volt-

age,wattage, etc.Replacement parts whichhave

thesespecial safety characteristics are identifiedin

thismanual and itssupplements, electricalcompo-

nentshavingsuchfeaturesareidentifieddesignated

symbolon the partslist.

Beforereplacinganyofthesecomponents,readthe

partslistinthis manualcarefully.Theuse ofsubstitute

replacementparts whichdo nothave thesame safety

characterisiticsasspecifideinthepartslistmaycreate

X-RAYRadiation.

PRODUCTSAFETYNOTICE

2. Specifications

CRT 28" : A66EAK071X54 ( PHILIPS )

System PAL/SECAM-B/G, D/K, PAL-I/I’, SECAM-L/L’, NTSC-3.58/4.43 (Play back )

Main Voltage 230V AC, 50Hz

Power Consumption Stand-by mode : 2.0 Watts

Normal operating mode : 80 Watts

Sound output 10 + 10 Watts, 10% THD at RF 60% mod. ( 1 kHz )

Speaker 12W 8ohm x 2 EA

Antenna Impedance 75 ohm unbalanced input (Din Standard )

Tuning system Frequency Synthesize(FS) Tuning System

Tuner DT5-BF14D, EL2782-105-B

Number of Program 100 programs

Aux. Terminal 21 pin EURO-SCART jack ( AV input, TV output, RGB input )

21 pin EURO-SCART jack ( AV input, S-VHS input )

RCA type AV input jack

Headphone jack ( 3.5 mm )

JACK AUDIO TERMINAL (AUDIO OUT L, R)

Remote controller R-22D05 with 2 "AAA" type batteries

Teletext TOP(5 Page memory) & FLOF(7 Page memory)

- West option : English, German/Dutch/Flemish, French, Italian, Spanish/Portuguese,

Swedish/Finnish/Danish, Hungarian, Rumanian, Turkish

- East option : Polish, Czech/Slovak, Rumanian, Servo-croat, German/Dutch/Flemish,

French, Estonian, Lettish

OSD language - West : English, German, French, Italian, Spanish, Nethelands, Swedish

- East : English, Russian, Polish, Rumanian, Czech, Hungarian

PIN Signal Designation Matching Value

1Audio Out (linked with 3) 0.5Vrms, Imp < 1 k (RF 60% MOD)

2Audio In (linked with 6) 0.5Vrms, Imp < 10 k

3Audio Out (linked with 1) 0.5Vrms, Imp < 1 k (RF 60% MOD)

4Audio Earth

5Blue Earth

6Audio in (linked with 2) 0.5Vrms, Imp < 10 k (RF 60% MOD)

7Blue in 0.7Vpp 2dB, Imp 75

8Slow (Function) Switching TV : 0-2V, PERI : 9.5 - 12V, Imp > 10 k

9Green Earth

10 NC

11 Green In 0.7Vpp 2dB, Imp 75

12 NC

13 Red Earth

14 Rapid(Blanking) Switching Earth

15 Red In, C In 0.7Vpp 2dB, Imp 75

16 Rapid(Blanking) switching Logic 0 : 0 - 0.4V, Logic 1 : 1 - 3V, Imp 75

17 Video Earth

18 Rapid Blanking Earth

19 Video Out 1Vpp 2dB, Imp 75

20 Video In, Y In 1Vpp 2dB, Imp 75

21 Common Earth

Specifications

3. Circuit Block Diagram

4. Alignment Instructions

4-1.UserRemocon

R-22D05

R-23D05

Alignment Instructions

*HowtoEnterthe“ServiceMode”withuserremocon.

1)SettheTVPr 91

2)Sharpness“MIN“control.

3)Red,Green,Yellowbuttons inregularsequencywithin 5secondsaftersettingTV poweroff.

4)YoucanseetheMenuof“servicemode“onthescreen.

5)The PRUP/DOWNbuttonsontheremotecontrollerareusedtomovetheselectionbarupordowntheMenus.

6)TheVOLUP/DOWNbuttonsontheremotecontrollerareusedtoadjustlevels.

7)Ifyouwanttoexitfrom“ServiceMode“thenpowertheTVoff.

-Youcansee theSVCMenu byOSDinTV set.

V. Slope

V.Center

V.Size

S.Curve

H.Center

H.Width

EW.Para

EW.CorT

EW.CB

EW.Sym

R.bias

G. b

B.b

R.drive

G. d

B.d

SubBri

005

995

220

019

-190

510

382

028

500

021

370

311

330

315

330

021

048

SVC v1

4-2.AFT

Standard B/G, D/K,Iand L

1)SetaSignalGeneratorwith

-RFFREQUENCY=38.9MHz,

-RFOUTPUTLEVEL=80 5dBuV

-Pattern =ColorBar

-System=PAL-B/G

2) ConnecttheSignalGeneratorRFOutput toTP2(TunerIFOutput).

Theremustbenosignal inputtothetuner.

3)SettheL109toTP1(I101,#22)withDCVoltageto2.5V 0.1V

4-3.AGC

1)SetaPatternGeneratorwithRFLEVEL60 3dBuV,RFFrequency210.25MHz(10CH),PatternColorBar.

2)ConnectaOSCILLOSCOPEPROBEtoP101(TUNERAGCINPUT).

3) SettheRBOItoP101(TunerAGCInput) withDCVoltageto2.8V 0.2V

4-4.SCREEN(G2)

1) SetaPatternGeneratorwith-RF Frequency:210.25MHz(10CH)

-Pattern:RETMA

2)Selectthe“G2”inMenu

3) AndaHorizontalLinewillappear onthescreen.

4)AdjusttheSCREENVOLUME onFBTbarelytoseetheHorizontalLine.

5)PressthePRUP/DOWNkeystofinishtheSCREENadjustment.

4-5.FOCUS

1)ApplyaRETMAPATTERNsignal.

2)AdjusttheFOCUSVOLUMEonFBTtoobtain optimalresolution.

4-6.GEOMETRY

4-6-1 VERTICAL SLOPE ( Fixed : Adjust if need be )

1)ApplyaRETMAPATTERNSignal.

2)SettheTVtoNormalI mode.

3)Adjustthehighersemicircleandthelowersemicircletobethesame,withtheV.Slopebyvolume

Up/Downkeys.

4-6-2 VERTICAL CENTER

1)ApplyaRETMAPATTERNSignal.

2)SettheTVtoNormalI mode.

3)Adjustthecenterof the picturewiththeV.Centerby volumeUp/Downkeys.

Alignment Instructions

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