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S/M No. : SC110N-101

Service Manual
Relese 1
DIGITAL HDTV

CHASSIS : SC-110

Model : DSC-30W60N

DSC-30W60N R-V3

Specifications
Power Requirement AC 120V, 60Hz
Power Consumption 250W (1.7W in standby)
Dimensions(W/H/D) 890 x 573 x 560 mm
Weight 64kg
General
Antenna Two 75 ohm external input terminals for UHF/VHF/Cable
One 75ohm external output terminal for Cable

RF Band Coverage VHF 2 ~ 13
UHF 14 ~ 69
CATV 1, 14 ~ 125

Screen Size 32 inches Pure Flat 16:9 Aspect ratio
Picture Display Format 1920 x 1080i (Digital)
Upconversion to 1080i with line doubling (NTSC)
Horizontal Resolution 800 Lines

Digital Audio Dolby Digital AC-3 / Pro logic
Sound NTSC Audio Multi-CH TV Stereo (MTS) / Second Audio Program (SAP)
Audio Power 8W / ch (Main L/R, Woofer), 5W / ch (Center, SL, SR)

A/V In 4 each (Video / L / R)
S-Video In 2 each
HD Component Video In 2 each ( Y/ Pb / Pr, R / G / B )
Number of Inputs / Outputs HD Component Audio In 1 each ( L / R / SL / SR / Center / Woofer )
Digital Audio In 2 each ( Coaxial / Optical )
Digital Audio Out 2 each ( Coaxial / Optical )
External Speaker Out 1 each ( SL / SR / Woofer)

DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr Mar. 2000
TABLE OF CONTENTS
1. Product Safety ................................................................................................................................2
2. Specifications .................................................................................................................................4
3. Reote Control Overview.................................................................................................................5
4. Limited Warranty ............................................................................................................................7
5. Service Mode ..................................................................................................................................8
6. General Adjustment .......................................................................................................................11
7. Special Adjustment (When replacing new circuit boards) .........................................................17
8. Troubleshooting Charts.................................................................................................................18
9. Parts List .........................................................................................................................................45
10. Circuit Digram...............................................................................................................................59
10-1. Connection Diagram.................................................................................................................59
10-2. Signal Flow Diagram ................................................................................................................60
10-3. Power Circuit ............................................................................................................................61
10-4. Main Circcuit.............................................................................................................................62
10-5. Video 1 Circuit ..........................................................................................................................63
10-6. Video2 Circuit ...........................................................................................................................64
10-7. Audio Circuit .............................................................................................................................65
10-8. Com-Filter Circuit .....................................................................................................................66
10-9. VM Circuit................................................................................................................................. 67
10-10. Blanking Circuit ......................................................................................................................68
10-11. Jack A/V, Control, LED Circuit ............................................................................................... 68
10-12. CRT Circuit.............................................................................................................................70
11. Exploded View ..............................................................................................................................71
12. PCB Layout ...................................................................................................................................72

1
1.PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS

CAUTION : Do not attempt to modify this product in any way. Unau- GRAPHIC SYMBOLS :
thorized modifications will not only void the warranty, but may lead to
your being liable for any resulting property damage or user injury. The lightning flash with arrowhead symbol,
Service work should be performed only after you are thoroughly within an equilateral triangle, is intended to alert
familiar with all of the following safety checks and servicing guide- the service personnel to the presence of uninsu-
lines. To do otherwise, increases the risk of potential hazards and lated "dangerous voltage" that may be of suffi-
injury to the user. cienty magnitude to constitute a risk of electric
shock.
SAFETY CHECKS
The exclamation point within an equilateral tri-
After the original service problem has been corrected, a check should angle is intended to alert the service personnel
be made of the following: to the presence of important safety information
in service literature.
SUBJECT : FIRE & SHOCK HAZARD
Fuse symbol is printed on pcb adjacent to the
1. Be sure that all components are positioned in such a way as to fuse, with "RISK OF FIRE REPLACE FUSE AS
avoid possibility of adjacent component shorts. This is especially MARKED". The symbol is explained in the ser-
important on those chassis which are transported to and from the vice manual with the following wording or equiv-
repair shop. alent.
2. Never release a repair unless all protective devices such as insula-
tors, barriers, covers, shields, strain reliefs, and other hardware CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE
have been reinstalled per original design. HAZARD, REPLACE ONLY WITH SAME TYPE (6.3A, 125V)" and
3. Soldering must be inspected to discover possible cold solder joints, "ATTENTION: AFIN D'ASSU UNE PROTECTION PERMANENTE
frayed leads, damaged insulation (including A.C. cord), solder CONTRE LES RISQUES D'INCENDIE, REMPLACER UNIQUE-
splashes or sharp solder points. Be certain to remove all loose for- MENT PAR UN FUSIBLE DE MEME TYPE ET DE "6.3A, 125V".
eign particals.
4. Check for physical evidence of damage or deterioration to parts SUBJECT : X-RADIATION
and components, and replace if necessary follow original layout,
lead length and dress. 1. Be sure procedures and instructions to all service personnel cover
5. No leads or components should touch a receiving tube or a resistor the subject of X-rays in current T.V. receivers is the picture tube.
rated at 1 watt or more. Lead tension around protruding metal sur- However, this tube does not emit X-rays when the high voltage is
faces must be avoided. at the factory specified level. The proper value is given in the appli-
6. All critical components such as fuses, flameproof resistors, capaci- cable schematic. Operation at higher voltages may cause a failure
tors, etc. must be replaced with exact factory types. Do not use of the picture tube or high voltage supply and, under certain cir-
replacement components other than those specified or make cumstances, may produce radiation in excess of desirable levels.
unrecommended circuit modifications. 2. Only factory specified C.R.T. anode connectors must be used.
7. After re-assembly of the set always perform an A.C. leakage test Degaussing shields also serve as X-ray shield in color sets.
on all exposed metallic parts of the cabinet, (the channel selector Always re-install them.
knob, antenna terminals, handle and screws) to be sure the set is 3. It is essential that the serviceman has available an accurate and
safe to operate without danger of electrical shock. Do not use a reliable high voltage meter. The calibration of the meter should be
line isolation transformer during this test. Use an A.C. voltmeter, checked perio - dically against a reference standard. Such as the
having 5000 ohms per volt or more sensitivity, in the following one available at your distributor.
manner : connect a 1500 ohm 10 watt resistor, paralleled by a 15 4. When the high voltage circuitry is operating properly there is no
mfd. 150V A.C. type capacitor between a known good earth possibility of an X-radiation problem. Every time a color chassis is
ground (9water pipe, conduit, etc.) and the exposed metallic parts, serviced, the brightness should be run up and down while monitor-
one at a time. Measure the A.C. voltage across the combination of ing the high voltage with a meter to be certain that the high voltage
1500 ohm resistor and 0.15 MFD capacitor. Reverse the A.C. plug does not exceed the specified value and that it is regulating cor-
and repeat A.C. voltage measurements for each exposed metallic rectly. We suggest that you and your service organization review
part. Voltage measured must not exceed 0.75 volts R.M.S. This test procedures so that voltage regulation is always checked as a
corresponds to 0.5 milliamp A.C. Any value exceeding this limit standard servicing procedure. And that the high voltage reading be
constitutes a potential shock hazard and must be corrected imme- recorded on each customer's invoice.
diately. 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.
A.C. VOLTMETER
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).

0.15 uF
Good earth ground,
such as the water
1500 OHM Place this probe
pipe, conduit, etc.
on each exposed
10WATT metal part.

2
SUBJECT : IMPLOSION 4. Wall and shelf mounted installations using a commercial mounting
kit, must follow the factory approved mounting instructions. A
1. All direct viewed picture tubes are equipped with an integral implo- receiver mounted to a shelf or platform must retain its original
sion protection system, but care should be taken to avoid damage feet(or the equivalent thickness in spacers) to provide adequate
during installation. Avoid scratching the tube. If scratched, replace are flow across the bottom, bolts or screws used for fasteners
it. must not touch and parts or wiring. Perform leakage test on cus-
2. Use only recommended factory replacement tubes. tomized installations.
5. Caution customers against the mounting of a receiver on sloping
SUBJECT : TIPS ON PROPER INSTALLATION 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
1. Never install any receiver in closed-in recess, cubbyhole or closely the cart. Caution the customer on the hazards of trying to roll a cart
fitting shelf space over, or close to heat duct, or in the path of with small casters across thresholds or deep pile carpets.
heated air flow. 7. Caution customers against the use of a cart or stand which has not
2. Avoid conditions of high humidity such as : Outdoor patio installa- been listed by underwriters laboratories, inc. For use with their
tions where dew is a factor. Near steam radiators where steam specific model of television receiver or generically approved for
leakage is a factor, etc. use with T.V.'s of the same or larger screen size.
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.

3
2. Specification

General
Power Requirement AC 120V, 60Hz
Power Consumption 250W (1.7W in standby)
Dimensions(W/H/D) 890 x 573 x 560 mm
Weight 64kg
Antenna Two 75 ohm external input terminals for UHF/VHF/Cable
One 75ohm external output terminal for Cable
RF Band Coverage VHF 2 ~ 13
UHF 14 ~ 69
CATV 1, 14 ~ 125

Picture
Screen Size 32 inches Pure Flat 16:9 Aspect ratio
Display Format 1920 x 1080i (Digital)
Upconversion to 1080i with line doubling (NTSC)
Horizontal Resolution 800 Lines

Sound
Digital Audio Dolby Digital AC-3 / Pro logic
NTSC Audio Multi-CH TV Stereo (MTS) / Second Audio Program (SAP)
Audio Power 8W / ch (Main L/R, Woofer), 5W / ch (Center, SL, SR)

Number of Inputs / Outputs
A/V In 4 each (Video / L / R)
S-Video In 2 each
HD Component Video In 2 each ( Y/ Pb / Pr, R / G / B )
HD Component Audio In 1 each ( L / R / SL / SR / Center / Woofer )
Digital Audio In 2 each ( Coaxial / Optical )
Digital Audio Out 2 each ( Coaxial / Optical )
External Speaker Out 1 each ( SL / SR / Woofer)

4
33. Remote control overview
The remote control has the following functions:
1. Power button
Press to turn the HDTV(and other equipment) on
and off.

2. MODE buttons
Press to select which equipment you wish your remote
control to operate:
* SAT(satelite)
* CATV (cable box)
* VCR
* TV
The Mode button you press will light up in red.

3. MENU button
Press once to display the HDTV menus. Press again to
make the menus disappear.

4. SEL ( Select) button
Press to select items on the HDTV menus.

5. Arrow buttons
Press to navigate through the HDTV menus.

6. STAT (Channel Station) button
Press to quickly select chammels to watch on your
HDTV.

7. VOL (Volume) buttons
press to raise and lower the volume on your HDTV.

8. Number buttons
Press to directly select channels or to enter the numbers
in the menus.

9. INFO (Information) button
Press to see the channel banner that provides information
while viewing your HDTV.

10. V MODE (Video Mode) button
Press to select a video mode : Normal, Dynamic,
Cinema or Customer.

5
Remote control overview

11. SOUND button 24. PREV (Previous) button
Press to select a sound option : Mono, Stereo, or Secondary Press to back up one menu at a time in the HDRV menus or to
Audio Programming (SAP). When you tune to a digital return to the previous channel.
channel, press to select various languages.
25. GUIDE button
12. SLEEP TIMER button Press this button to see the HDTV Program Guide.
Press to select the time before the HDRV turns off: 30
minutes, 60 minutes, 90 minutes, or 120 minutes. 26. MUTE button
Press to mute the HDTV sound.
13. CLOSED CAPTION button
Press to turn closed captions on and off. 27. TV / VIDEO button
Press to view components you have connected to the HDTV.
14. FF (Fast Forward) button. Press this button repeatedly to display:
Press to fast forward a videocassette. * TV mode
* HD comp (HD Component Video)
15. PLAY button * Video 1
Press to play a videocassette. * Video 2
* Video 3
16. PAUSE button * Video 4
Press to pause a VCR.

17. REC(Record) button
Press to record a videotape.

18. STOP button
Press to stop a VCR.

19. REW (Rewind) button
Press to rewind a videocassette.

20. SCREEN MODE button
Press to select how to view your HDTV:
Normal or Full.

21. ADD / ERASE button
Press to add and erase channels on your HDTV.

22. 100 button
Press to select cable channels over 100 on TV or DSS
broadcasts.

23. CH (Chnnel) buttons
Press to select channels.

6
4. Limited Warranty
Daewoo Electronics Corporation of America Inc. (also known as DECA) warrants this product to be free from defects in material
and workmanship and agrees to remedy any such defect.

This warranty covers 3 years labor and 3 years parts from the date of original purchase.

This warranty applies only to product purchased from authorized DECA dealer and used within the boundaries of U.S.A.

This warranty does not apply to product that has been improperly installed, subjected to usage for which the product was not
designed, misused or abused, damaged during transportation, or which has been altered in any way that affects the reliability or
detracts from its performance.

How you get warranty service
Warrany service can only be provided by an authorized DECA service center. For the closest authorized service center to you,
please contact your Dealer. In order to receive warranty service you must provide the authorized service center with a copy of proof
of purchase, signifying the date of purchase and the name of the Dealer from whom you purchased the product.

Statutory warranities
The purchase may have rights under existing provincial or federal laws, and where any terms of this warranty are prohibited by
such laws, they ard deemed null and void, but the remainder of the warranty shall remain in effect.

If you require further assistance, please call:

1-800-DAEWOO-8

7
5. Service Modes
1. Entering to Service Mode
1) With the user remote control
Press the button in the following order.

1 MUTE SELECT MUTE POWER 1,2,3, ... 9
.,

2) With the service remote control

S1 : Heat Run S2 : Screen Voltage S3 : Sound Controls

S4 : Video Controls S5 : Geometry S7 : White Balance

S8 : Sub Brightness S9 : Software Version S10: Factory Setting

2. Function of each service mode
1) S1 : Heat Run mode.

White Pattern

2) S2 : Screen Voltage Control mode
The vertical deflection is down, and a horizontal line appears on the screen.
3) S3 : Sound Controls mode