DAEWOO DTQ-2033SC, DTQ-27U4SC Service Manual

Service Manual

http : //svc.dwe .co.kr

S/M No : TCN230FEF0

COLOR TELEVISION

CHASSIS : CN-230F

Model : DTQ-20U4SC

DTQ-2033SC
DTQ-27U4SC

Mar. 2003

✔

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-

SAFETY PRECAUTIONS 2
SPECIFICATIONS 5
CIRCUIT BLOCK DIAGRAM 6
ALIGNMENT INSTRUCTIONS 7

YOUR REMOTE CONTROL 7
SERVICE MODE ADJUSTMENT 8

ASSEMBLY ADJUSTMENT 10
SCHEMATIC DIAGRAM 13
ELECTRICAL PARTS LIST 17
DIFFERENT PARTS LIST 37
EXPLODE VIEW 42
PRINTED CIRCUIT BOARD 45

IC DESCRIPTION 48
WAVEFORMS 54
TROUBLE SHOOTING GUIDE 57

NO POWER 57

NO PICTURE 58

NO SOUND 59

CH DON’T STOP 60

NO COLOR 61

NO VERTICAL DEFLECTION 61

NO ON-SCREEN DISPLAY 62

NO REMOCON RECEIPT 62

TABLE OF CONTENTS

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

-2-

SAFETY PRECAUTIONS

CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY.
NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC­TURER'S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID
THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULT­ING PROPERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOR­OUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND
SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF
POTENTIAL HAZARDS AND INJURY TO THE USER.
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION
FROM A.C. LINE SHOCK.

SAFETY CHECKS

AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED, A CHECK
SHOULD BE MADE OF THE FOLLOWING:

SUBJECT:FIRE & SHOCK HAZARD

1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY AS
TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS
ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANS­PORTED TO AND FROM THE REPAIR SHOP.

2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS
INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER
SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER
ORIGINAL DESIGN. BE SURE, THAT THE SAFETY PURPOSE OF THE
POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.

3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD SOL­DER JOINTS, SOLDER SPLASHES OF SHARP SOLDER POINTS. BE CER­TAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.

4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION TO
PARTS AND COMPONENTS, FOR FRAYED LEADS, DAMAGED INSULATION
(INCLUDING A.C. CORD), AND REPLACE IF NECESSARY. FOLLOW ORIGI­NAL LAYOUT, LEAD LENGTH AND DRESS.

5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING TUBE OR A
RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PRO­TRUDING METAL SURFACES MUST BE AVOIDED.

6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTOR,
CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES.
DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECI­FIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS.

7. AFTER RE-ASSEMBLY OF THE STE ALWAYS PERFORM AN A.C. LEAKAGE
TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET. (THE CHAN­NEL SELECTOR KNOB, ANTENNA TERMINALS, HANDLE AND SCREWS) TO
BE SURE THE SET IS SAFE TO OPERATE WITHOUT DANGER OF ELECTRI­CAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS
TEST USE AN A.C. VOLTMETER, HAVING 5000 OHMS PER VOLT OR MORE
SENSITIVITY, IN THE FOLLOWING MANNER : CONNECT A 1500 OHM 10
WATT RESISTOR, PARALLELED BY A .15 MFD. 150V A.C. TYPE CAPACI­TOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER POPE, CON­DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.
MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM
RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND
REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC
PART. VOLTAGE MEASURED MUST NOT EXCEED .75 VOLTS R.M.S THIS
CORRESPONDS TO 0.5 MILLIAMP A.C. NAY VALUE EXCEEDING THIS LIMIT
CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED
IMMEDIATELY.

SUBJECT : X-RADIATION

1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSON­NEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL
SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE.
HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLT­AGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN
IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLT-AGES MAY
CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY
AND UNDER CERTAIN CIRCUMSTANCES, AMY PRODUCE RADIA-TION IN
EXCESS OF DESIRABLE LEVELS.

2. ONLY FACTORY SPECIFIED C.R.T ANODE CONNECTORS MUST BE
USED.DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR
SETS. ALWAYS RE-INSTALL THEM.

3. IT IS ESSENTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCU­RATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE
METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE
STANDARD. SUCH AS THE ONE AVAILABLE AT YOUR DISTRIBUTOR.

4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE
IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR
CHASSIS IS SERVICED, THE BRIGHTNESS SHOULD BE RUN UP AND DOWN
WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN
THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND
THAT IT IS REGULATING CORRECTLY. WE SUGGEST THAT YOU AND YOUR
SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE
REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING
PROCEDURE, AND THAT THE HIGH VOLTAGE READING BE RECORDED ON
EACH CUSTOMER’S INVOICE.

5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A
PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING
UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE
SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY
TO LOCATE THE CAUSE OF EXCESSIVE VOLTAGE.

6. REFER TO HV, B+ AND SHUTDOWN ADJUSTMENT PROCEDURES
DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE
USED).

SUBJECT : IMPLOSION

1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTEGRA
IMPLOSION PROTECTION SYSTEM. BUT CARE SHOULD BE TAKEN TO
AVOID DAMAGE DURING INSTALLATION. AVOID SCRATCHING THE TUBE.
OF SCRATCHED REPLACE IT.

2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.

SUBJECT : TIPS ON PROPER INSTALLATION

1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR
CLOSELY FITTING SHELF SPACE, OVER OR CLOSE TO HEAT DUCT, OR IN
THE PATH OF HEATED AIR FLOW.

2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO
INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS
WHERE STEAM LEAKAGE IS A FACTOR, ETC.

3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING.
THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE
SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILA­TION.

4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCIAL
MOUNTING KIT, MUST FOLLOW THE FACTORY APPROVED MOUNTING
INSTRUCTIONS. A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST
RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPAC­ERS)TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR
SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR
WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.

5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON
SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS
PROPERLY SECURED.

6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNT­ING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRY­ING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR
DEEP PILE CARPETS.

7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH
HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES. INC. FOR
USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR
GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER
SCREEN SIZE.

8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS,
EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE
OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND
FAMILY.

THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL,
WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO
ALERT THE SERVICE PERSONNEL TO THE PRES-ENCE
OF UNINSULATED “DANGEROUS VOLTAGE”
THAT MAY BE OF SUFFICIENT MAGNITUDE TO CON­STITUTE A RISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL
TRIANGLE IS INTENDED TO ALERT THE SERVICE
PERSONNEL TO THE PRESENCE OF IMPORTANT
SAFETY INFORMATION ON SERVICE LITERATURE.

SUBJECT : GRAPHIC SYMBOLS

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-

SAFETY PRECAUTIONS

CAUTION : Do not attempt to modify this product in any way. Unau­thorized modifications will not only void the warranty, but may lead to your
being liable for any resulting property damage or user injury.
Service work should be performed only after you are thoroughly familiar
with all of the following safety checks and servicing guide-lines. To do
otherwise, increases the risk of potential hazards and injury to the user.

SAFETY CHECKS

After the original service problem has been corrected, a check should be
made of the following:

SUBJECT : FIRE & SHOCK HAZARD

1. Be sure that all components are positioned in such a way as to avoid
possibility of adjacent component shorts. This is especially important on
those chassis which are transported to and from the repair shop.

2. Never release a repair unless all protective devices such as insula-tors,
barriers, covers, shields, strain reliefs, and other hardware have been
reinstalled per original design.

3. Soldering must be inspected to discover possible cold solder joints,
frayed leads, damaged insulation (including A.C. cord), solder splashes
or sharp solder points. Be certain to remove all loose for-eign particals.

4. Check for physical evidence of damage or deterioration to parts and
components, and replace if necessary follow original layout, lead length
and dress.

5. No leads or components should touch a receiving tube or a resistor
rated at 1 watt or more. Lead tension around protruding metal sur-faces
must be avoided.

6. All critical components such as fuses, flameproof resistors, capaci-tors,
etc. must be replaced with exact factory types. Do not use replacement
components other than those specified or make unrecommended circuit
modifications.

7. After re-assembly of the set always perform an A.C. leakage test on all
exposed metallic parts of the cabinet, (the channel selector knob,
antenna terminals, handle and screws) to be sure the set is safe to
operate without danger of electrical shock. Do not use a line isolation
transformer during this test. Use an A.C. voltmeter, having 5000 ohms
per volt or more sensitivity, in the following manner : connect a 1500
ohm 10 watt resistor, paralleled by a 15 mfd. 150V A.C. type capacitor
between a known good earth ground (9water pipe, conduit, etc.) and
the exposed metallic parts, one at a time. Measure the A.C. voltage
across the combination of 1500 ohm resistor and 0.15 MFD capacitor.
Reverse the A.C. plug and repeat A.C. voltage measurements for each
exposed metallic part. Voltage measured must not exceed 0.75 volts
R.M.S. This corresponds to 0.5 milliamp A.C. Any value exceeding this
limit constitutes a potential shock hazard and must be corrected imme­diately.

The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to alert
the service personnel to the presence of uninsu­lated “dangerous voltage” that may be of suffi­cienty magnitude to constitute a risk of electric
shock.

The exclamation point within an equilateral tri­angle is intended to alert the service personnel
to the presence of important safety information
in service literature.

Fuse symbol is printed on pcb adjacent to the
fuse, with “RISK OF FIRE REPLACE FUSE AS
MARKED”. The symbol is explained in the ser­vice manual with the following wording or equiv­alent.

“CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD, REPLACE ONLY WITH SAME TYPE (4A, 125V)” and
“ATTENTION: AFIN D’ASSU UNE PROTECTION PERMANENTE
CONTRE LES RISQUES D’INCENDIE, REMPLACER UNIQUE-MENT
PAR UN FUSIBLE DE MEME TYPE ET DE ”4A, 125V”.

SUBJECT : X-RADIATION

1. Be sure procedures and instructions to all service personnel cover
the subject of X-rays in current T.V. receivers is the picture tube.
However, this tube does not emit X-rays when the high voltage is at
the factory specified level. The proper value is given in the appli­cable schematic. Operation at higher voltages may cause a failure
of the picture tube or high voltage supply and, under certain cir­cumstances, may produce radiation in excess of desirable levels.

2. Only factory specified C.R.T. anode connectors must be used.
Degaussing shields also serve as X-ray shield in color sets. Always
re-install them.

3. It is essential that the serviceman has available an accurate and
reliable high voltage meter. The calibration of the meter should be
checked perio - dically against a reference standard. Such as the
one available at your distributor.

4. When the high voltage circuitry is operating properly there is no
possibility of an X-radiation problem. Every time a color chassis is
serviced, the brightness should be run up and down while monitor­ing the high voltage with a meter to be certain that the high voltage
does not exceed the specified value and that it is regulating cor­rectly. We suggest that you and your service organization review
test procedures so that voltage regulation is always checked as a
standard servicing procedure. And that the high voltage reading be
recorded on each customer’s invoice.

5. When troubleshooting and making test measurements in a receiver
with a problem of excessive high voltage, avoid being unnecessarily
close to the picture tub eand the high voltage compartment. Do not
operate the chassis longer than is necessary to locate the cause of
excessive voltage.

6. Refer to HV, B+and Shutdown adjustment procedures described in
the appropriate schematic and diagrams(where used).

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

-4-

SAFETY PRECAUTIONS

SUBJECT : IMPLOSION

1. All direct viewed picture tubes are equipped with an integral implo­sion protection system, but care should be taken to avoid damage
during installation. Avoid scratching the tube. If scratched, replace it.

2. Use only recommended factory replacement tubes.

SUBJECT : TIPS ON PROPER INSTALLATION

1. Never install any receiver in closed-in recess, cubbyhole or closely
fitting shelf space over, or close to heat duct, or in the path of
heated air flow.

2. Avoid conditions of high humidity such as : Outdoor patio installa­tions where dew is a factor. Near steam radiators where steam
leakage is a factor, etc.

3. Avoid placement where draperies may obstruct rear venting. The
customer should also avoid the use of decorative scarves or other
coverings which might obstruct ventilation.

4. Wall and shelf mounted installations using a commercial mounting
kit, must follow the factory approved mounting instructions. A
receiver mounted to a shelf or platform must retain its original
feet(or the equivalent thickness in spacers) to provide adequate are
flow across the bottom, bolts or screws used for fasteners must not
touch and parts or wiring. Perform leakage test on cus-tomized
installations.

5. Caution customers against the mounting of a receiver on sloping
shelf or a tilted position, unless the receiver is properly secured.

6. A receiver on a roll-about cart should be stable on its mounting to
the cart. Caution the customer on the hazards of trying to roll a cart
with small casters across thresholds or deep pile carpets.

7. Caution customers against the use of a cart or stand which has not
been listed by underwriters laboratories, inc. For use with their
specific model of television receiver or generically approved for use
with T.V.’s of the same or larger screen size.

-5-

SPECIFICTION

Model

DTQ-20U4SC DTQ-2033SC DTQ-27U4SC

Item
CHASSIS CN-230F
TV Standard NTSC-M
Power Input AC 120v, 60Hz
Power Consumption 90W 120W
Tuning System Frequency Synthesizer(FS) Tuning System
Tuning Ranges TV VHF(L) : CH2 - CH6

UHF(H) : CH7 - CH13
UHF : CH14 - CH69
CATV VHF(L) : 5A, A,B,A-5-A-1

CH2-CH6

VHF(H) : C-W+11

CH7 - CH13

UHF : W+12-W+84”
Sound Output 3W + 3W 5W + 5W
Speaker 8 ohm 3W x 2EA 8 ohm 7W x 2EA
Antenna Input Impedance 75 ohm Unbalanced

Auxiliary Input Terminal Front : Video, Audio(L,R) - AV3

Rear : Video, Audio(L,R) - AV1

Video, Audio(L,R) - AV2

Y, Cb, Cr, Audio(L,R) - CVI
Auxiliary Output Terminal Rear : Video, Audio(L,R) - MONITOR OUT
Intermediate Frequencies Picture IF Carrier Frequency : 45.75MHz

Sound IF Carrier Frequency : 41.25MHz

Color Sub-Carrier Frequency : 3.579545MHz
Remote Control R-43A07
Special Function 1) Closed Caption

2) V-Chip

3) Channel Label

-6-

CIRCUIT BLOCK DIAGRAM

-7-

ALIGNMENT INSTRUCTION

1. POWER
use this button to turn your TV on or off.

2. MUTE
Use to turn the TV's sound on and off.

3. CH
Use these buttons to change your TV's volume, to
activate selections in the menu system.

4. VOL
Use thesebuttons to change your TV's volume, to
activate selections in the meny system, or to change
audio and video settings.

5. MENU
Use this button to turn the TV's menu system on and off.

6. DISPLAY
Use this button to display the channel numbeer and
status.

7. INPUT
Use this button to select the TV's signal source.

8. VIDEO
Use this button to display video adjustment.

9. 0-9
Use these buttons to change channels.

10. SLEEP
Use this button to program the TV to turn off after a
certain time.

11. PREVIOUS
Use this button to return to the previous channel you
were watching.

1

3

4

11

8
7

2

4
5

3

9

10

6

POWERMUTE

MENU

CH

SLEEP PREVIOUS

VIDE OINPU TDISPLAY

1 2 3

4 5 6

7 8

0

9

VOL VOL

Your Remote Control(R-43A07)

-8-

ALIGNMENT INSTRUCTION

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)

O

Data is stored in I703.

I101

(MAIN)

O

I703

(EEPROM)

Initial setting values are written from I701.

ADJUSTING ITEMS

S5 : SOUND CONTROL

O S6 : H.PHASE/H.SIZE/V.POSI/V.SIZE

S8 : RD/GD/BD/RB/GB/BB
S9 Subbrightness

CRT O Adjust items related to picture tube only.(White Balance adjustment)

S2 SCRN
S5 SND
S6 GEO

VDP

S7
S8 W/B
S9 DP
S12 FACT

-9-

ALIGNMENT INSTRUCTION

MODE ADJUSTMENT DATA REMARKS

INITIAL20” INITIAL 27” RANGE
S2 Screen Adjustment
S5 SOUND CONTROL

FM/AM PRE 55 55 0~127
SCART PRE 49 51 0~127
MONI VOL 38 45 0~127
QUASI CHECK NO NO YES/NO
NO SD NO POWER NO NO YES/NO

S6 V-SIZE 387 416 0~510 *

V-POSI 1312 1280 240~1712 *
H-PHASE 43 43 0~255 *
H-SIZE 2182 676 4~4092 *
V-LIN 258 239 0~511 *
V-S 243 236 2~512
HBST 267 267 0~511
TILT 512 392 8~1016 **
P-PARA 512 645 3~1021 **
H-SYM 1024 1048 8~2040 **
H-COR 1024 904 8~2040 **
HBSO 367 367 0~511

S7 BCLTH 130 150 0~2047

BCLTM 5 8 0~15
BCLG 5 6 0~15
BCLTST 0 0 0~1020
PKINV 0 0 0/1
BLE 1 1 0/1
BTLT 8 0 0~15
BAM 12 9 0~31
SVG1 20 20 0~63
SVD1 7 2 0~7
SVLIM 127 100 0~127
SVDEL 0 7 0~15
OSDBR 130 255 0~511
OSDCO 130 120 0~511

S8-1 RD 700 800 0~1023 *

GD 700 800 0~1023 *
BD 700 800 0~1023 *
RB 350 350 0~511 *
GB 350 350 0~511 *
BB 350 350 0~511 *

S8-2 SCR R-BIAS 0 0 0~511

SCR G-BIAS 0 0 0~511
SCR B-BIAS 450 470 0~511
SCR R-DRIVE 0 0 0~1023
SCR G-DRIVE 0 0 0~1023
SCR B-DRIVE 200 200 0~1023

S9 DP-BRI 160 160 0~310 *

DP-CONT 5 13 0~13
DP-TINT 150 200 0~222
DP-COL 0 100 0~850
DP-OVPK 0 0 0~4
DP-UNPK 2 2 0~4

BRI-SET 74 80 0~100
S11 DVCO OK OK *
S12 Forwarding Mode Factory initialization

Table-B

* indicates the items with different settings each of sets (20”& 27”)
** indicates the items with different settings each of sets (only 27””)

-10-

ALIGNMENT INSTRUCTION

2) FOCUS ADJUSTMENT

•

Turn in a local station and adjust the Focus Control knob (located on FBT) for best picture

details at high light condition.

3) GEOMETRIC ADJUSTMENTS (S6)

•

Select service adjustment S6

•

You can see the OSD as shown in below.

3-1. Horizontal Position Adjustment

•

Select H-PHASE item, adjust H-PHASE data value to obtain proper horizontal centering of the

internal cross pattern at the left and right of the screen.

3-2. Vertical Position Adjustment

•

Select V-POSI item, adjust V-POSI data value to center the raster properly on the screen.

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.

IN THE SCREEN ADJUSTMENT MODE, DONT PRESS OTHER BUTTONS EXCEPT VOLUME UP OR DOWN BUTTON.

CAUTION

V-SIZE

V-POSI

H-PHASE

H-SIZE

V-LIN

V-S

HBST

TILT

P-PARA

H-SYM

H-COR

HBSO

392

645

1048

904

367

416

1280

43

676

239

236

267

-11-

ALIGNMENT INSTRUCTION

3-3. Vertical Size Adjustment

•

Select “V.SIZE” item, adjust “V.SIZE” data value to proper vertical size as follows.

4) WHITE BALANCE ADJUSTMENT(S8)

•

Receive a good local channel.

•

Enter the service mode and select service adjustment S8.

•

You can see the OSD as shown in below.

•

Using volume up or volume down, adjust service adjustment data of RD/GD/BD and RB/GB/BB until a good gray

scale with normal whites is obtained.ALIGNMENT INSTRUCTIONS

•

Press the DISPLAY button to memorize the data.

5) DIGITAL PRESET(D.P) ADJUSTMENTS(S9)

SUBBRIGHTNESS ADJUSTMENT

•

Receive a good local channel.

•

Enter the service mode and select service adjustment S9.

•

You can see the OSD as shown in below.

RD 800

GD 800

BD 800

RB 350

GB 350

BB 350

MOVE ADJUST RECALL : SET

DP-BRI 160

DP-CONT 13

DP-TINT 200

DP-COL 100

DP-OVPK 0

DP-UNPK 2

BRI-SET 80

MOVE ADJUST RECALL : SET

-12-

ALIGNMENT INSTRUCTION

•

Select Subbrightness item, adjust Subbrightness data value

to obtain normal

brightness level.

•

Press the DISPLAY button to memorize the data.

CONTRAST

•

Fixed value = 13

TINT

•

Fixed value = 200

COLOR

•

Fixed value = 100

6) FACTORY OUTGOING MODE (S12 : FACT)

•

If you select the S12, then the set becomes factory outgoing status.

•

You can see the OSD “outgoing OK”

-13-

SCHEMATIC DIAGRAM

20U4(SHEET-1)

-14-

SCHEMATIC DIAGRAM

20U4 (SHEET-2)

-15-

SCHEMATIC DIAGRAM

27U4(SHEET-1)

-16-

SCHEMATIC DIAGRAM

27U4(SHEET-2)

-17-

ELECTRICAL PARTS LIST

1 ZZ100 48B4343A07 TRANSMITTER REMOCON R-43A07 (AA)
2 ZZ110 PTACPWJ954 ACCESSORY AS DTQ-21U4SC
3 M821 4858213801 BAG INSTRUCTION L.D.P.E T0.05X250X400
4 ZZ120 PTBCSHJ954 COVER BACK AS DTQ-21U4SC
5 M211 4852161700 COVER BACK FR HIPS GY 21U4
6 M781 4857817630 CLOTH BLACK FELT 400X20X0.7
7 ZZ130 PTPKCPJ954 PACKING AS DTQ-21U4SC
8 10 6520010100 STAPLE PIN AUTO W65

9 M801 4858061500 BOX CARTON DW-3 21U4
10 M811 4858100B00 PAD EPS 21U4
11 M821 4858219101 BAG P.E P.E FOAM T0.5X1300X1150
12 ZZ131 48519A7110 CRT GROUND NET 2101F-1015-1P
13 ZZ132 58G0000154 COIL DEGAUSSING DC-21F1
14 ZZ140 PTCACAJ954 CABINET AS DTQ-21U4SC
15 M201A 4856013300 SCREW CRT FIXING 30X80 BK
16 M201B 4856013302 SCREW CRT FIXING 30X190 BK
17 M201C 4856219502 WASHER RUBBER CR T2.0 BLACK
18 M211A 7172401412 SCREW TAPPTITE TT2 TRS 4X14 MFZN BK
19 M211B 7178301212 SCREW TAPPTITE TT2 WAS 3X12 MFZN BK
20 M541 4855415800 SPEC PLATE 150ART P/E FILM (C/TV)
21 SP01A 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN
22 SP02A 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN
23 V901 4859636160 CRT A51QDK090X030 P38
24 ZZ200 PTFMSJJ954 MASK FRONT AS DTQ-21U4SC
25 M191 4851948100 BUTTON CTRL AS 4952500+5546800
26 M191A 7178301011 SCREW TAPPTITE TT2 WAS 3X10 MFZN
27 M201 4852081000 MASK FRONT FR HIPS GY 21U4
28 M481 4854862100 BUTTON POWER FR ABS GY 21U4
29 M481A 4856716000 SPRING SWPA PIE0.5
30 M561 4855617500 MARK BRAND CU AU+ABS BK
31 ZZ210 PTSPPWJ954 SPEAKER AS DTQ-21U4SC
32 PA601 4850704S27 CONNECTOR YH025-04+YRT205+ULW=400
33 SP01 4858314010 SPEAKER SP-5070F01 3W 8 OHM
34 SP02 4858314010 SPEAKER SP-5070F01 3W 8 OHM
35 ZZ290 PTMPMSJ954 PCB MAIN MANUAL AS DTQ-21U4SC
36 10 2193102005 SOLDER BAR SN:PB=63:47 S63S-1320
37 30 2291050616 FLUX SOLDER JS-64T3
38 40 2291050301 FLUX SOLVENT IM-1000
39 C212 CCZB1H181K C CERA 50V B 180PF K (AXIAL)
40 C310 CEXF1E222V C ELECTRO 25V RSS 2200MF (16X25) TP

NO LOC PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK

**This BOM is based on DTQ-20U4SC

"!" is a safety part, so it must be used the same part.

"R" is a recommendable part for essential stock.

CAUTION

✔ In this Service 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)

-18-

ELECTRICAL PARTS LIST

41 C331 CEYD1H689W C ELECTRO 50V RHD 6.8MF (16X35.5)
42 C404 CMYH3C912J C MYLAR 1.6KV BUP 9100PF J
43 C406 CMYE2G364J C MYLAR 400V PU 0.36MF J
44 C801 CL1UC3104M C LINE ACROSS WORLD AC250V 0.1UF M R.47
45 C804 CEYN2D331P C ELECTRO 200V LHS 330MF
46 C812 CEYF1E332V C ELECTRO 25V RSS 3300MF (16X31.5)
47 C814 CEYF2C221V C ELECTRO 160V RSS 220MF (18X35.5)
48 C852 CEYF1V222V C ELECTRO 35V RSS 2200MF (16X31.5)
49 D419 DRGP30J—- DIODE RGP30J
50 D424 DDG3——— DIODE DG3
51 D703 DLH2PR—— LED BLOCK LH-2P-R
52 D801 DPBS606GU- DIODE BRIDGE PBS606G
53 D807 DRGP30J—- DIODE RGP30J
54 D842 DRGP30J—- DIODE RGP30J
55 F801 5F1GB5021L FUSE GLASS TUBE CSA/UL 125V 5A
56 I201 1MM1118—- IC A/V SWITCH MM1118
57 I301 PTF2SW7921 HEAT SINK ASS`Y 1LA7848—- + 7174300811
58 00001 1LA7848—- IC VERTICAL LA7848
59 0000A 4857027921 HEAT SINK AL EX BK
60 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
61 I401 PTM2SW6902 HEAT SINK ASS`Y 1K78R05—- + 7174300811
62 00001 1K78R05—- IC REGULATOR KIA78R05PI
63 0000A 4857026902 HEAT SINK AL EX BK
64 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
65 I501 1VDP3130Y- IC VDP3130Y
66 I502 1LP295033- IC REGULATOR LP2950 3.3V
67 I601 1MSP3420V3 IC SOUND PROCESSOR MSP3420G-PP-B8-V3
68 I602 PTG2SW8210 HEAT SINK ASS`Y 1TDA8944J- + 7174300811
69 00001 1TDA8944J- IC SOUND TDA8944J
70 0000A 4857028210 HEAT SINK AL EX
71 0000B 7174301011 SCREW TAPPTITE TT2 RND 3X10 MFZN
72 I701 1DW8638TA1 IC MICOM LC863856A-51S2
73 I703 124LC16B1B IC MEMORY 24LC16B1B
74 I801 PTD2SW7720 HEAT SINK ASS`Y 1MR2520—- + 7174300811
75 00001 1MR2520—- IC POWER MR2520
76 0000A 4857027720 HEAT SINK AL EX
77 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
78 I803 1KA431L—- IC KA431L
79 I804 1LTV817C— IC PHOTO COUPLER LTV-817C
80 I805 1LTV817C— IC PHOTO COUPLER LTV-817C
81 IL701 1KRT30—— IC PREAMP KRT30
82 JP01 4859111550 JACK PIN BOARD YPJ501B
83 JP02 4859106440 JACK S-VHS PH-SJ-9503
84 JP03 4859108850 JACK PIN BOARD PH-JB-9512
85 JP04 4859108450 JACK PIN BOARD YSC03P-4120-14A

NO LOC PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK

-19-

ELECTRICAL PARTS LIST

86 JP05 4859102130 JACK EARPHONE YSC-1537
87 L301 58C7070085 COIL CHOKE TLN-3062A
88 L401 58H0000020 COIL H-LINEARITY L-76(76.5UH)
89 L801 5PLF24A3— FILTER LINE LF-24A3
90 P502 4859235320 CONN WAFER YW025-10
91 PWC1 4859907810 CORD POWER AS ME301P+TER=2100
92 Q402 PTE2SW7609 HEAT SINK ASS`Y TKSC5386— + 7174300811
93 00001 TKSC5386— TR HORI KSC5386
94 0000A 4857027609 HEAT SINK AL EX
95 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN
96 R420 RD-4Z302J- R CARBON FILM 1/4 3K OHM J
97 R555 RD-AZ560J- R CARBON FILM 1/6 56 OHM J
98 R801 RX10B109JQ R CEMENT 10W 1 OHM J BEN 25MM 4P
99 R805 RW02Z128KS R WIRE WOUND 2W 0.12 OHM K SMALL

100 R882 DDB3R0M140 POSISTOR ECPBD3R0M140
101 RLY1 5SC0101338 SW RELAY GJ-SS-105LM
102 RS801 DSVC471D14 VARISTOR SVC471D14A
103 SW707 5S50101035 SW TACT KPT-1112 1C-1P
104 T401 50D10A3—- TRANS DRIVE TD-10A3
105 T402 50H0000223 FBT FFA64717M
106 T801 50M4242B9- TRANS SMPS TSM-4242B9
107 U101 4859723230 TUNER VARACTOR 115-V-F025AR
108 X501 5XE20R250E CRYSTAL QUARTZ HC-49/U 20.2500MHZ 30PPM
109 X601 5XE18R432E CRYSTAL QUARTZ HC-49/U 18.43200MHZ 30PPM
110 X701 5XYR03276C CRYSTAL QUARTZ C-001R 32.768000KHZ 20PPM
111 ZZ200 PTMPJ0J954 PCB MAIN (RHU) AS DTQ-21U4SC
112 C405 CEXA2D229E C ELECTRO 200V RUL 2.2MF (10X16) TP
113 C409 CMXE2G273J C MYLAR 400V PU 0.027MF J (TP)
114 C414 CEXF1V471V C ELECTRO 35V RSS 470MF (10X20) TP
115 C415 CEXF1C102V C ELECTRO 16V RSS 1000MF (10X20) TP
116 C420 CEXF2E220V C ELECTRO 250V RSS 22MF (13X20) TP
117 C702 CEXF1C102V C ELECTRO 16V RSS 1000MF (10X20) TP
118 C809 CBXB3D102K C CERA SEMI 2KV BL(N) 1000PF K (T)
119 C813 CBXB3D471K C CERA SEMI 2KV BL(N) 470PF K (T)
120 C815 CEXF2A470V C ELECTRO 100V RSS 47MF (10X16) TP
121 C817 CBXB3D471K C CERA SEMI 2KV BL(N) 470PF K (T)
122 C820 CEXF2C101V C ELECTRO 160V RSS 100MF (16X25) TP
123 C832 CBXB3D471K C CERA SEMI 2KV BL(N) 470PF K (T)
124 C842 CBXB3D471K C CERA SEMI 2KV BL(N) 470PF K (T)
125 C880 CH1BEE472M C CERA AC U/C/V 2.5KV 4700PF TP
126 C881 CH1BEE472M C CERA AC U/C/V 2.5KV 4700PF TP
127 ZZ200 PTMPJBJ954 PCB MAIN M-10 AS DTQ-21U4SC
128 10 2TM18006BE TAPE MASKING 6.2X500
129 E002 4856310600 EYE LET BSR T0.2 (R2.3)
130 E003 4856310600 EYE LET BSR T0.2 (R2.3)

NO LOC PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK