DAEWOO DTQ-20J5FC Service Manual

S/M No. : CN220A-010

Service Manual

Color Television

CHASSIS : CN-220A

Model : DTQ-20J5FC

Specification

Items	Model	DTQ-20J5FC
TV Standard		NTSC-M
Power Input		AC120V, 60Hz
Power Consumption		20=65W
Tuning System		Frequency Synthesizer(FS)Tuning System
Tuning Ranges		VHF : 2 - 13(12)
		UHF : 14 - 69(56)
		CATV : 1-125(125)
Sound Output		1.3W+1.3W
Speaker		3W 8 ohm
Antenna Input Impedance		75 ohm Unbalanced
Intermediate Frequencies		Picture IF Carrier Frequency : 45.75MHz
		Sound IF Carrier Frequency : 41.25MHz
		Color Sub-Carrier Frequency : 42.17MHz
Remote Control		R-38T01
		3-Language OSD
Special Function		With CAPTION
		Wake-up On/Off Time
		Sleep Timer
		Power Restore

DAEWOO ELECTRONICS CO., LTD

http : //svc.dwe.co.kr

Nov. 2000

TABLE OF CONTENTS
SAFETY PRECAUTIONS ....................................................................................................................	2
PRODUCT SAFTY SERVICING GUIDELINES FOR AUDIO - VIDEO PRODUCS .........................................	2
PRODUCT SAFTY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS .............................	3
SPECIFICATIONS ...............................................................................................................................	5
BLOCK DIAGRAM ..............................................................................................................................	6
ALIGNMENT INSTRUCTIONS ............................................................................................................	7
SERVICE MODE ADJUSTMENTS ..................................................................................................................	7
ASSEMBLY ADJUSTMENTS ..........................................................................................................................	8
ELECTRICAL PARTS LIST.................................................................................................................	12
EXPLODED VIEW ...............................................................................................................................	17
APPENDIX (Appendix is provide only by internet [http://svc.dwe.co.kr])
IC DESCRIPTION ................................................................................................................................	1
TROUBLE SHOOTING CHARTS........................................................................................................	10
NO POWER .....................................................................................................................................................	10
NO PICTURE ...................................................................................................................................................	11
NO SOUND ......................................................................................................................................................	12
CH DON’T STOP .............................................................................................................................................	13
NO COLOR ......................................................................................................................................................	14
NO VERTICAL DEFLECTION .........................................................................................................................	14
NO ON-SCREEN DISPLY ...............................................................................................................................	15
REMOTE CONTROL DOES NOT OPERATE .................................................................................................	15

1

PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO - VIDEO PRODUCTS

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.

A.C. VOLTMETER

GOOD EARTH GROUND			0.15 uF								PLACE THIS PROBE
			1500 OHM
SUCH AS THE WATER											ON EACH EXPOSED
PIPE, CONDUIT, ETC.			10WATT								METAL PART

SUBJECT : GRAPHIC SYMBOLS

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 CON-

STITUTE 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 : 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 VOLTAGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND UNDER CERTAIN CIRCUMSTANCES, AMY 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 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.

2

PRODUCT SAFETY SERVICING GUIDELINES FOR COLOR TELEVISION RECEIVERS

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 guidelines. 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 insulators, 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 foreign 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 surfaces must be avoided.

6.All critical components such as fuses, flameproof resistors, 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 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.

A.C. VOLTMETER

Good earth ground,					0.15 uF

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

GRAPHIC SYMBOLS :

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 UNIQUEMENT 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).

3

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 customized 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.

4

SPECIFICATIONS

	MODEL	DTQ-20J5FC	REMARKS
	ITEMS
	TV STANDARD	NTSC-M
	POWER INPUT	AC 120V 60 Hz
	POWER CONSUMPTION	20 = 65W
	TUNING SYSTEM	Frequency Synthesizer ( FS ) Tuning System
		VHF : 2 ~ 13 (12)
	TUNING RANGES	UHF : 14 ~ 69 (56)
		CATV : 1 ~ 125 (125)
	SOUND OUTPUT	1.3 W+1.3 W
	SPEAKER	3 W 8 ohm
	ANTENNA INPUT	75 ohm Unbalanced
	IMPEDANCE
	INTERMEDIATE	Picture IF Carrier Frequency : 45.75 MHz
		Sound IF Carrier Frequency : 41.25 MHz
	FREQUENCIES
		Color Sub-Carrier Frequency : 42.17 MHz
	REMOTE CONTROL	R-38T01
		3-Language OSD
		With CAPTION
	SPECIAL FUNCTIONS	Wake-up On/Off Time
		Sleep Timer
		Power Restore

5

ANTENNA

33V 5V

BLOCK

TUNER

I101

U102

SOUND

2 AUDIO

16

+10V

SP2

RF INPUT

AUDIO DEMOD/VOL CONTROL

I601

I603

CXA2104S

TDA-

51

IF

AGC

7496L

SP1

DIAGRAM

SAW

5

11

3 4

SDA

SCK

FILTER

6

SF101

VIF

SPEAKER

L501

IF VCC

PLL

49

SCL

29 30

DEMOD

VCO

SDA

POWER

5V

48

15

RF AGC

4

AGC

VOIL

CH +/-

13

AFT

VOL +/-

AFT

14

10

MENU

V. OUT

46

Z501

19

Q703

CVBS

40

TRAP

PRE

V. IN

4.5MHz

34

AMP

44

VIDEO/VER.

HEATER

V.SYNC

43

I901

ST-BY 5V

12

20

VCC (5V)

21

H.SYNC

CHROMA/

TDA6103Q

CRT

42

RESET (L)

17

I701

X-RAY

34

LUMINANCE

RED

1

9

PROCESS

19

MICROCOMPUTER

ABL

GREEN

10

13

20

2

8

BLUE

6

22

OSD RED

14

21

3

7

X701

11

23

OSD GREEN

15

28

FBP

6

32.768KHz

OSD BLUE

24

16

HORIZONTAL

25

HOR/BUS VCC

200V

PW ON(H) 42

25

OSD BLANK

17

/VERTICAL

A.MUTE(H) 40

PROCESS

18

RGB VCC

27

SDA

SDA

SCK

SDA

11

IF/VIDEO

H.OUT(L) 37

5V

28

SCK

5

6

SCK

12

Hcp

H.V.

23

27

I703

ST-BY 5V

8 EEPROM

VER. OUT

I401

133V

FOCUS

7805

B

C

VIDEO

(200V)

SCREEN

5

Q401

C

T401

Q402

133V

B

HEATER

I301

HOR. DR

HOR. OUT

ABL

AC 120V

LA7841

45V

6

60Hz

T801

C

45V

10V

L801

D801

SMPS TRANS

33V

Q403

(RGB 9V/TUNER 5V)

LINE

BRIDGE

B

U-COM

HOR

25.5V

FILTER

DIODE

ST-BY 5V

VER. B+

#37

ON/OFF

(VER. B+)

D

SOUND 12V

HOR.

133V

G

Q801

S

I801

12V

VERT.

FET

DPM001T1

PW ON(H)

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.

∙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.

S2	SCRN
S5	IFC
S6	GEO
S8	W/B
S9	DP
S12	FACT
S7	PTRN	NORMAL

∙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	ADJUSTMENT				NOTES
REPLACED	NECESSARY	UNNECESSARY
I701		O	Data is stored in I703.
(U-COM)
I101		O
(MAIN)
			Initial setting values are written from I701.
			Adjusting Items
I703	O			S5	RFAGCD
				S6	H.PHASE/V.POSI/V.SIZE
(EEPROM)
				S8	RD/BD/RB/GB/BB
				S9	Subbrightness
CRT	O		Adjust items related to picture tube only.(White Balance adjustment)

7

ALIGNMENT INSTRUCTIONS

Table-B

MODE	ADJUSTMENT ITEMS	DATA			REMARKS
		INITIAL		RANGE
S2	Screen Adjustment	-		-
	Auto RF AGC	-		-
	Video Level (VIDEOL)	7		0 ~ 7	Must be set to 7
S5	RF AGC Delay (RFAGCD)	*		0 ~ 63	Align RF AGC threshold
	FM Level (FM.LEV)	8		0 ~ 31	Must be set to 20
	AGC Point	3.75		-	Select AGC reference voltage
	A/D VALUE	-		-
	Horizontal Phase(H.PHASE)	*		0 ~ 31	Align sync to flyback pulse, using internal cross pattern(S7)
	Vertical Position (V.POSI)	*		0 ~ 63	Align vertical DC bias, using internal cross pattern(S7)
S6	Vertical Size (V.SIZE)	*		0 ~ 127	Align vertical amplitude, using internal cross pattern(S7)
	NO SD POWER OFF	YES		-	Automatically turn off in 15min for no received signal.
	Vertical S-Correction (V SC)	0		0 ~ 31	Must be set to 6
	Vertical Linearity (V LIN)	20		0 ~ 31	Must be set to 16
	Internal Black	-		-	Display internal BLACK pattern
S7	Internal 100% White	-		-	Display internal 100% WHITE
	Internal 60% White	-		-	Display internal 60% WHITE
	Internal Cross Pattern	-		-	Display internal CROSS pattern
	Red Drive (RD)	*		0 ~ 127	Align RED OUT AC level
	Green Drive (GD)	10		0 ~ 15	Must be set to 10
S8	Blue Drive (BD)	*		0 ~ 127	Align BLUE OUT AC level
	Red Bias (RB)	*		0 ~ 255	Align RED OUT DC level
	Green Bias (GB)	*		0 ~ 255	Align GREEN OUT DC level
	Blue Bias (BB)	*		0 ~ 255	Align BLUE OUT DC level
	Subbrightness	*		0 ~ 127	Align common RGB DC level
S9	Contrast	10		0 ~ 27
	Tint	27		0 ~ 27
	Color	15		0 ~ 27
S12	Forwarding Mode		-		Factory Initialization

* indicates the items with different settings each of sets

2.ASSEMBLY ADJUSTMENTS

1)SCREEN ADJUSTMENT (S2)

∙Enter the service mode and select service adjustment S2.

∙You cna 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.

NOTE

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

8

ALIGNMENT INSTRUCTIONS

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)RF AGC DELAY ADJUSTMENT (S5)

∙Receive a good local channel.

∙Enter the service mode and select service adjustment S5.

∙You can see the OSD as shown in below.

IF	CONTROL
AUTO	RFAGC	START
VIDEOL		7
RFAGCD		10
FM.LEV		8
AGC POINT		3.75
A/D VALUE : 8DH

¡ã ¡å MOVE ¢¸ ¢º ADJUST RECALL : SET

∙Select RFAGCD item, press the volume up or down button until noise or beat in picture disappears.

∙Press the DISPLAY button to memorize the data.

4)GEOMETRIC ADJUSTMENTS (S6)

∙Enter the service mode and select service adjustment S7.

∙Whenever you select the “S7”using the volume up or down button, the screen is changing like this.

NORMAL

BLACK

WHITE100

WHITE60

CROSS

∙Using the volume up or down button, select internal cross pattern.

∙Select service adjustment S6

∙You can see the OSD as shown in below.

GEOMETRY

H. PHASE 20

V.	POSI	29
V.	SIZE	70
NO SD POWER OFF YES
V	SC	0
V	LIN	20

¡ã ¡å MOVE ¢¸ ¢º ADJUST RECALL : SET

4-1. 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.

4-2. Vertical Position Adjustment

∙ Select V.POSI item, adjust V.POSI data value to center the raster properly on thescreen.

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ALIGNMENT INSTRUCTIONS

4-3. Vertical Size Adjustment

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

5)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.

RD	58
GD	10
BD	65
RB	105
GB	160
BB	100

¡ã ¡å MOVE ¢¸ ¢º ADJUST RECALL : SET

∙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.

6)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 shoown in below.

D.P.
SUB BRIGHTNESS	64
CONTRAST	10
TINT	27
COLOR	15

ã¡ å¡ MOVE ¸¢ º¢ ADJUST RECALL : SET

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