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S/M No. : TCN011NEF0

Service Manual
Color Television
CHASSIS : CN-011
Model :
DTQ-29S3FC U.S.A
DTQ-26S3FC Canada
DTQ-26S3FCM

DTQ-29S3FC DTQ-26S3FC DTQ-26S3FCM

SPECIFICATIONS
MODEL
ITEMS DTQ-29S3FC DTQ-26S3FC DTQ-26S3FCM

TV STANDARD NTSC-M
POWER INPUT AC 120V 60Hz
POWER CONSUMPTION 97W 95W 90W
TUNING SYSTEM Frequency Synthesizer(FS)Tuning System
VHF:2~13(12)
TUNING RANGES UHF:14~69(65)
CATV:1~125(125)
SOUND OUTPUT 1.8W 1.8W 1.8W+1.8W 1.8W
SPEAKER 3W 8ohm
ANTENNA INPUT
75ohm Unbalanced
IMPEDANCE
AUXILIARY Front : Video, Audio
INPUT TERMINAL Rear:Video, Audio

INTERMEDIATE Picture IF Carrier Frequency :45.75MHz
Sound IF Carrier Frequency :41.25MHz
FREQUENCIES Color Sub-Carrier Frequency :42.17MHz
REMOTE CONTROL R-43A01
3-Language OSD
With CAPTION
SPECIAL FUNCTIONS Wake-up On/Off Time
Sleep Timer
Power Restore

DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr Aug. 2000
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............................................................................................. 15
SERVICE PARTS LIST ..................................................................................................... 16
1. DIFFERENT PARTS LIST ..................................................................................................................... 23

APPENDIX ( Appendix is provided only by internet [http://svc.dwe.co.kr] )
IC DESCRIPTION ......................................................................................................... 1
TROUBLE SHOOTING CHARTS ...................................................................................... 13

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 (5A, 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 " 125V"
5A, .
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' invoice.
s
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.' of the same or larger screen size.
s
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
SPECIFICATIONS

MODEL
DTQ-29S3FC DTQ-26S3FC DTQ-26S3FCM REMARKS
ITEMS
TV STANDARD NTSC-M
AC 120V 60 Hz
POWER INPUT

POWER CONSUMPTION 97W 95W 90W
TUNING SYSTEM Frequency Synthesizer ( FS ) Tuning System
VHF : 2 ~ 13 (12)
TUNING RANGES UHF : 14 ~ 69 (56)
CATV : 1 ~ 125 (125)
SOUND OUTPUT 1.8W31.8W 1.8 W+1.8 W 1.8W
SPEAKER 3 W 8 ohm
ANTENNA INPUT
75 ohm Unbalanced
IMPEDANCE
AUXILIARY Front : Video, Audio
INPUT TERMINAL Rear : Video, Audio
Picture IF Carrier Frequency : 45.75 MHz
INTERMEDIATE
Sound IF Carrier Frequency : 41.25 MHz
FREQUENCIES
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(29 ONLY)

9V 5V
RF
5V 33V

SOUND IC
SOUND
T UNER 9V VIDEO S/W IC MSP3435G
AMP
DT5-NF20F TA7347P
TDA7267
CONTROL SCL S DA
A
SCL S DA TRAP
SAW MAIN IC
BPF 14V
IR FILTER DCT814B (1) (2)

IF DET.
SCL OUT
SW1 ~
SDA
SW5
u-COM IC
O SD RGB VIDEO
LC863240V

5
AMP
SCL RGB
EEPROM 5V TDA6103Q
SDA
CIRCUIT BLOCK DIAGRAM

X-RAY
9V
SOUND SCL (1)
5V
SOUND SDA (2)

200V

OCP VERTICAL HOR. OUTPUT 10V FBT Scr een Fouse H.V .
LA7845 2SD2578
26V 14V
27V HEATER
POWER IC
STR-F6626
DEFLECTION YOKE
SMPS TRANS
TSM-4242B5 FBT

HYBRID IC
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.