Daewoo DTD-14D3 ME Bedienungsanleitung

Service Manual

Items Model DTD-14D3/20D3/21D3 ME/MT/MP/MZ

14D4/20D4/21D4 ME/MT/MP/MZ

14D6/21D6 ME/MT/MP/MZ

14D7/20D7/21D7 ME/MT/MP/MZ

21U6/21U8 ME/MT/MP/MZ

TV Standards PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV)

MainsVoltage AC 100~250V, 50/60Hz

Power Consumption Stand-by mode : 5W

Normal Operating Mode :14”=85W, 20”=95W, 21”=105W, 21”(flat)=115W

Sound Ouput1 14/20”=5W+5W Over(80% MOD.at 1KHz THD.10%)

21U6=5W+5W Over(80% MOD.at 1KHz THD.10%)

21”,21U8=7W+7W Over(80% MOD.at 1KHz THD.10%)

Speaker 14/20”=7.5W 8 Ohm (2pcs)

21U6=5W 8 Ohm (2pcs) , 21”,21U8=12W 8 Ohm (2pcs)

Antenna 75 Ohm Unbalanced. (DIN Standard)

Tuning System FS Tuning System

Memory Channel 100 Channels

Remocon Control R-44C07

ReceptionChannel VHF - BAND1 : CH2-CH4

BAND2 : CH5-CH12

CABLE BAND : S1’-S3, S1-S20

HYPER BAND : S21-S41

UHF-BAND : CH21-CH69

Remark OSD

TELETEXT (Top & Flop Teletext)

PIP(AV PIP, Swap, Size, Position)

Digital Eye

Colour Television

CHASSIS : CM-905S/SF

Model :

DTD-

14D3/20D3/21D3 ME/MT/MP/MZ

14D4/20D4/21D4 ME/MT/MP/MZ

14D6/21D6 ME/MT/MP/MZ

14D7/20D7/21D7 ME/MT/MP/MZ

21U6/21U8 ME/MT/MP/MZ

S/M No. :TCM905SEF0

DAEWOO ELECTRONICS CO., LTD

http : //svc.dwe.co.kr June.2001

Specification

- 1 -

TABLE OF CONTENTS

SPECIFICATIONS .............................................................................................................. 2

SAFETY INSTRUCTION .................................................................................................... 3

CIRCUIT BLOCK DIAGRAM ............................................................................................. 4

ALIGNMENT INSTRUCTIONS .......................................................................................... 5

CM-905S/SF TYPICAL SERVICE DATA ............................................................................ 8

SCHEMATIC DIAGRAM ..................................................................................................... 11

PRINTED CIRCUIT BOARD .............................................................................................. 12

MECHANICAL EXPLODED VIEW AND PARTS LIST ...................................................... 13

ELECTRICAL PARTS LIST ............................................................................................... 19

CM-905S/SF EACH MODEL PARTS LIST ........................................................................ 29

APPENDIX (“Appendix is provided only by internet [http://svc.dwe.co.kr]”)

IC DESCRIPTION .............................................................................................................. 1

TROUBLE SHOOTING CHARTS ...................................................................................... 19

- 2 -

Items Model DTD-14D3/20D3/21D3 ME/MT/MP/MZ

14D4/20D4/21D4 ME/MT/MP/MZ

14D6/21D6 ME/MT/MP/MZ

14D7/20D7/21D7 ME/MT/MP/MZ

21U6/21U8 ME/MT/MP/MZ

TV Standards PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV)

MainsVoltage AC 100~250V, 50/60Hz

Power Consumption Stand-by mode : 5W

Normal Operating Mode :

14”=85W, 20”=95W, 21”=105W, 21”(flat)=115W

Sound Ouput1 14/20”=5W+5W Over(80% MOD.at 1KHz THD.10%)

21U6=5W+5W Over(80% MOD.at 1KHz THD.10%)

21”,21U8=7W+7W Over(80% MOD.at 1KHz THD.10%)

Speaker 14/20”=7.5W 8 Ohm (2pcs)

21U6=5W 8 Ohm(2pcs) , 21”,21U8=12W 8 Ohm (2pcs)

Antenna 75 Ohm Unbalanced. (DIN Standard)

Tuning System FS Tuning System

Memory Channel 100 Channels

Remocon Control R-44C07

Reception Channel VHF - BAND1 : CH2-CH4

BAND2 : CH5-CH12

CABLE BAND : S1’-S3, S1-S20

HYPER BAND : S21-S41

UHF-BAND : CH21-CH69

Remark OSD

TELETEXT (Top & Flop Teletext)

PIP(AV PIP, Swap, Size, Position)

Digital Eye

SPECIFICATIONS

CAUTION

- 3 -

SAFETY INSTRUCTION

CAUTION

NOTE

BEFORE SERVICING THIS CHASSIS READ THE “X-RAY RADIATION PRECAUTIONS”,

“SAFETY PRECAUTIONS” AND “PRODUCT SAFETY NOTICE” BELOW.

X-RAY RADIATION PRECAUTIONS

1. Excessivehigh voltagecan produce potentially hazard-

ousX-RAYRADIATION.To avoidsuch hazards,the

high voltage must not exceed the specified limit. The

nominal value of the high voltage of this receiver is

25kV(21”) at max beam current. The high voltage must

not,under any circumstances, exceed 27kV(21”).

Each time a receiver requires servicing, the high volt-

age should be checked. It is recommended the reading

SAFETY PRECAUTIONS

1. Potentials of high voltage are present when this

receiver is operating. Operation of the receiver outside

the cabinet or with the back cover removed involves a

shock hazard from the receiver.

1) Servicing should not be attempted by anyone who is

not thoroughly familiar with the precautions necessary

whenworking onhigh voltage equipment.

2) Always discharge the picture tube to avoid the shock

harzard before removing the anode cap.

3) Discharge the high potential of the picture tube before

handlingthe tube.The picturetube ishighly evacuated

and if broken, glass fragments will be violently expelled.

PRODUCT SAFETY

Many electrical and mechanical parts in this chassis have

specialsafety-related characteristics.

These characteristics are often passed unnoticed by a

visualinspection andthe X-RAYRADIATION protection

afforded by them cannot necessarily be obtained by using

replacementcomponents ratedfor highervoltage, wattage,

etc.

Replacement parts which have these special safety char-

acteristics are identified in this manual and its supple-

ments,electrical components having such featuresare

identified by designated symbol on the “PART LIST”.

Beforereplacing anyof thesecomponents, readthe “PART

LIST” in this manual carefully.

The use of substitute replacement part which do not have

the same safety characteristics as specified in the “PART

LIST”may created X-RAY RADIATION.

of the high voltage recorded as a part of the service

recorded as a part of the service records. It is important

to use an accurate and reliable high voltage meter.

2. The only source of X-RAY RADIATION in this TV

receiveris thepicture tube.For continuousRADIATION

protection, the replacement tube must be exactly the

same type tube as specified in the “PART LIST”.

2. If any FUSE in this TV receiver is blown, replace it will

the FUSE specified in the “PART LIST”.

3. When replacing a high wattage resistor (oxide metal

film resistor) in circuit board, keep the resistor 10mm

awayfrom circuitboard.

4. Keepwires awayfrom high voltage or high temperature

components.

5. Thisreceiver mustoperate betweenAC 100~240volts,

50/60Hz. NEVER connect to DC supply or any other

power or frequency.

- 4 -

CIRCUIT BLOCK DIAGRAM

CAUTION

- 5 -

ALIGNMENT INSTRUCTIONS

CAUTION

1. AGCADJUSTMENT

1) Pattern : PAL B/G 10CH Color BAR (RF Level = 60 dB)

2) Connect the Pattern Generator RF Output to Tuner RF Input.

3) Press the S10 Key of Service Remocon to enter the “AGC MODE”.

4)Execute the“AUTOAGC”using theVol-UpKey.

2.SCREEN ADJUSTMENT

1) Pattern : PAL B/G Retma

2) Press the NORMAL Key to set the “NORMAL 1” mode.

3) Press the S2 Key of Service Remocon.

4) Adjust the SCREEN VOLUME on FBT so that the horizontal line reach the cut-off point.

3. FOCUSADJUSTMENT

1) Pattern : PAL B/G Retma

2) Adjust the FOCUS VOLUME on FBT to obtain clear resolution.

4.WHITE BALANCEADJUSTMENT

1) Press the NORMAL Key to set the “NORMAL 1” mode.

2) Press the S8 Key of Service Remocon to enter the “WHITE BALANCE” mode.

3) Adjust the each color ( R,G,B ) which appears abnormally on the screen.

5. GEOMETRIC ADJUSTMENT

1) Press the NORMAL Key to set the “NORMAL 1” mode.

2) Press the S6 Key of Service Remocon to enter the “GEOMETRIC” mode.

5-1.VERTICALCENTERADJUSTMENT

1) Pattern : PAL B/G Retma

2)Choose the“V-CENTER” using thePr-Up/Down Keys.

3) Adjust the horizontal line of picture to coincide with the mechanical center marks of the CRT using the

Vol-Up/Down Keys.

*If the pattern is smaller than the screen, adjust the V-size to fit.

5-2.VERTICALSIZEADJUSTMENT

1) Pattern : PAL B/G Retma

2)Choose the“V-SIZE” using thePr-Up/Down Keys.

3) Adjust the vertical size of the picture using the Vol-Up/Down Keys.

- 6 -

5-3.HORIZONTALCENTERADJUSTMENT

1) Pattern : PAL B/G Retma

2)Choose the“H-CENTER” usingthe Pr-Up/Down Keys.

3) Adjust the vertical line of picture to coincide with the mechanical center marks of the CRT usingthe

Vol-Up/DownKeys.

5-4.HORIZONTALSIZEADJUSTMENT

1) Pattern : PAL B/G Retma

2) Choosethe “H-SIZE”using thePr-Up/DownKeys.

3) Set each side over scan to be 10% using the Vol-up/Down Keys.

5-5.PINCUSHION ADJUSTMENT

1) Pattern : PAL B/G Crosshatch

2)Choose the“PARABOLA”usingthe Pr-Up/DownKeys.

Adjust parabola width to fit on screen.

3) Choosethe “CONER”using thePr-Up/DownKeys.

Adjust coner parabola to fit on screen.

4)Choose the“TRAPEZIUM” usingthe Pr-Up/DownKeys,

Adjust trapezium to fit on screen.

5-6.S-CORRECTION ADJUSTMENT

1) Pattern : PAL B/G Crosshatch

2)Choose the“S-CORRECTION” usingthe Pr-Up/Down Keys.

3) Adjust each distance of horizontal line to be the same using the Vol-Up/Down Keys.

5-7.SUB-BRIGHTNESS ADJUSTMENT

1) Pattern : PAL B/G Retma

2) Press the NORMAL Keys to set the “NORMAL 1” mode.

ALIGNMENT INSTRUCTIONS

- 7 -

ALIGNMENT INSTRUCTIONS

6. REMOCON

6-1. SERVICEREMOCON 6-2. USER REMOCON

6-3.SERVICEREMOCON

1) Enter SERVICE MODE : Press keys of User Remocon, as follows.

Ch91, Sharpness 0, Skip(red), Move(green), Menu.

2) Choice SERVICE MENU : Pr-Up/Down

3)Enter SERVICESUBMENU :Vol-Up/Down

4)Adjust SERVICEMENU: Vol-Up/Down

S1 S2 S3

S4 S5 S6

S7 S8 S9

S11

RECALL

S10 S12

MUTE POWER

TV/CATV

ADD/ERASE

TV/VIDEO

SOUND MODE

SURROUND

NOISE CLEAR

VOLVOL

PIP M/S

CH VOL

V-

POSITION

TV/VIDEO PAUSE/

STILL

SIZE SLEEP

3456

R-34SVC

890

- 8 -

CM-905S/SF TYPICAL SERVICE DATA

CAUTION

CM-905S/SF SVC KEY & FUNCTION DESCRIPTION

EY N NAME RFUNCTION

PRESS THE S1 ONE TINE ----> PRESS THE S1 ANOTHER TIME

(HEATRUN MODE) (NORMAL OPRATION)

*FBT SCREEN ADJUSTMENT

PRESS THE S2 ON TIME ----> PRESS THE S2 ANOTHER TIME

(HORIZONTAL KINE) (NORMALOPRATION)

*SOUNDTEST

PRESS THE S3 KEY IS TOGGLE

VOLUME00 ---->VOLUME 32----> VOLUME63--->

BALANS LEFT ----> BALANS RIGHT ----> BALANS 00 ----> RELEAS

*PICTURETEST

PRESS THE S4 KEY IS TOGGLE

CONTRAST 00 ----> CONTRASR 32 ----> CONTRAST 63 ---->

RRIGHT 00 ----> BRIGHT 32 ----> BRIGHT 63 ---->

COLOR 00 ----> COLOR 32 ----> COLOR 63 ----> RELEASE

*ADJUSTNORMAL1DATA INITIALDATA

CONTRAST 48 63

RRIGHT 38 23

COLOR 38 32

SHARPNESS 28 32

*ADJUSTGEOMETRYDATA

21 inch Normal 21 inch Flat Normal INITIALDATA(50Hz)

V-CENTER 04 04 04

V-SIZE 54 58 27

H-CENTER 11 12 14

H-SIZE 53 52 58

S6 PARABORA 27 48 27

TRAPEZIUM 15 17 15

CORNER 05 05 05

H-EHT 03 03 03

S-CORRECTION 08 08 07

V-LINEARITY 08 07 09

V-EHT 03 03 03

*ADJUSTPIP DATA

21 inch Normal 21 inch Flat Normal

R 220 220 128

G 220 220 128

B 220 220 128

S1 HEATRUN MODE

S2 SCREEN

ADJUSTMENT

S3 SOUND TEST

S4 PICTURE TEST

S7 PIP INITIALDATA

Line Production

ON/OFF

NORMAL1

- 9 -

CM-905S/SF SVC KEY & FUNCTION DESCRIPTION

WHITE BALANCE *ADJUST WHITE BALANCE DATA

RB R LOW BEAM 127

GB G LOW BEAM 146

BB B LOW BEAM 125

GG G HIGH BEAM 52

BG B HIGH BEAM 52

SUB-BRIGHT ADJUST BRIGHTNESS DATA 35

SUB-CONTRAST ADJUST SUB CONTRAST DATA 15

*MAIN RF AGC ADJUSTMENT KEY

AGC TUNER AGC VOLTAGE 3.5Vdc

AUTO-AGC

DATA 32

*OPTION MODE ADJUSTMENT KEY INITIAL DATA

TEXT ARABIC/CYRILLIC/IRANIAN/EAST-LATIN//WEST-LATIN ARABIC

POWER-ON-START ON/OFF ON

DIGITAL EYE ON/OFF ON

*OUTDATA

PICTURE NORMAL 1

BLUESCREEN ON

BASS CENTER

TREBLE CENTER

BALANCE CENTER

EFFECT OFF

CLOCK

ONTIMER

ON/OFF

ON PR 1

OFFTIMER

ON/OFF

LANGUAGE ENGLISH

COLORSYSTEM PAL

SOUNDSYSTEM BG

SOUND MODE MEMORY

NAME(EACHPR) ----

TV/AV1/AV2 TV

S10

S11

S12 OFF

OFF

CM-905S/SF TYPICAL SERVICE DATA

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