Daewoo SJ-210 Service Manual

S/M No. : DSJ210BEF0

Service Manual

LCD PROJECTION TV

(HDTV MONITOR)

Model : DSJ-6000LN

CHASSIS : SJ-210

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).

DAEWOO ELECTRONICS Corp.

http : //svc.dwe.co.kr

Nov. 2002



1.	Safety precautions	2
2.	Product specification	4
3.	Remocon specification	5
4.	Adjustment	7
5.	Circuit Manual	11
6.	Trouble shooting	27
7.	Block diagram	35
8.	Exploded View	36
9.	Connection diagram	37

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1. 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 insulators, barriers, covers, shields, strain relief, 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.

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Safety precautions

GRAPHIC SYMBOLS :

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the service personnel to the presence of uninsu-lated" dangerous voltage" that may be of suffi-cienty magnitude to constitute a risk of electric shock.

The exclamation point within an equilateral tri-angle 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 ser-vice manual with the following wording or equiv-alent

CAUTION : FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME TYPE (6.3A, 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 " 6.3A, 125V" .

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.

Caution for servicing

When the general troubles happen, Remove the back cover of the TV set. But , however if the components (the Air filter, Lamp, Lamp detect switch, or LCD Engine driver PCB, etc) in the front of TV set is out of order, Remove the speaker grill and the front panel of the TV set.

Specially, First you have to plug out socket , for exchanging the Fuse of TV set,.

When Lamp driver is operated, the high voltage(13~20kV) is generated from the Lamp. Therefore the person only who has the enough knowledge for the high voltage must handle it with care.

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KEY Button and Function

KEY BUTTON

FUNCTION

Remote controller

Green - TV in use

Lamp

Orange - VCR in use

Red - CATV in use

POWER

Use turning on, turning off TV

TV/VCR/CATV

TV / Video / Cable Converter

Use to select

Use to select channel directly 0~9

channel directly

100 Button

Use it when selecting a channel number of over 100

RECALL

It displays currently watching TV channel and its input signal.

VCR Function

REW, PLAY, FF, STOP, REC, PAUSE.

Use it to make picture adjustment, screen format, sound adjustment, input

selection, and utilities.

TV/ VIDEO

Use this function to make video input selection.

It changes in the fallowing sequence

VIDEO 1

VIDOE 2

VIDEO 3

DVD

PC/DTV

DTV can be selected alternately.

Use it when selecting either PC or DTV.

Channel/ Volume

Use this function to select the channel / to adjust the volume.

It returns to previous channel.

MUTE

Use to mute.

SCREEN MODE

This feature converts the screen mode each time you press the button

from

Normal

Bright

Soft

User

SCREEN SIZE

This feature converts the screen size by changing its aspect ratio. Each

time you press the button, it will be change from

Normal

Wide

Panorama

Enlarge(LB)

Enlarge(LBS)

DOLBY SOUND

This button allows you to choose one of the Pro-logic modes.

Normal

Off

3-stereo

Wide

SOUND MODE

This feature allows you to choose the mode, Each time the button is pressed,

it rotates from Normal

Music

Movie

News

User

ADD/ERASE

This feature either momorizes the current channel or erases a channel that

has previously memorized.

CAPTION

This feature allows you choose the caption. Each time the button is pressed it

rotates from CC1

CC2

CC3

CC4

off

SLEEP

This feature is use to set up the time out of automatic turn off..

MTS

This feature allows you to select the language while broadcasting.

TV/CATV

This button allows you to select the broadcasting alternately.

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4-1. Adjustment in Production

Set all adjustment after about 5 Min s heatruning

Note : Lamp wattage converted automatically from 160W to 130W after 3 min.

Heatrun must be operated after inputing White_Pattern, (no concerned ‘No Signal’)

Note : You select ‘White_Pattern’ in ‘Test Pattern’ of SVC Menu.

You select Screen Size is ‘Wide’ and Screen Mode is ‘Normal’.

1)How to Fix Engine.

You measure the range of screen s shifting after assembling set.

But, in case of the range is over spec ( H : 7mm, V: 3mm, Tilt : 2mm), adjust again in Local CH 8(RETMA) of the factory.

2)Adjustment H/V Position.

You select PC Mode to receive reference signal of VG-828 (Program #. 954 : 720p Pattern. 990 : Display Position Pattern)

Note : LCD Panel is 720p.

You can adjust screen size and position in operating User Menu ( Horizontal Size & Position, Vertical Size & Position).

3)White balance adjustment

Input the signal of VG-828 (Program #. 946(NTSC) White Window Pattern.(2020)) to Video 1. Confirm the initial data of PW364 Mode in SVC Menu.

Adjust the White Balance changing R/G/B Gain after setting signal level 100IRE( 255). How to adjust temperature of color. : X = 0.265 0.01 0.270 0.01.

You can set Luminance level .

Adjust the White Balance changing R/G/B Bias after setting signal level 40IRE( 102).

Input the signal of VG-828 (Program #. 972(1080i) White Window Pattern.(2020)) to DTV.

Adjust the White Balance changing AD9884 s Register Value(CXA1315A, CXA1315B, CXA1315C) after setting signal level 40IRE( 102).

Adjust the White Balance changing CXA2101 s Register Value(R-Drive, G-Drive, B-Drive) after setting signal level 40 IRE( 102).

Confirm the range of White Balance being in limit and measure Luminance value

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4-2. SERVICE MODE

To operate Service : Press the USER Remote controller in order starting with CH Up Mute RECALL Mute (You can operate in case INPUT is TV mode, or being input signal)

Service Mode

SVC MAIN	(Initial Data of the Service mode)
PW364	(Adjusting Brightness Contrast and White Balance of full input)
AD9884	(Adjusting Brightness Contrast of DTV/ PC input)
CXA2101	(Adjusting Brightness Contrast and White Balance of DTV input)
VPC3230	(Adjusting Brightness Contrast of TV / VIDEO/DVD input)
Test Pattern	(Displaying in order R G B W BLK
Lamp Watt	(Adjusting Lamp Wattage 160W or 130W)
ENG Control	(Adjusting LCD ENGINE UNIT)
Use Time	(Total usage time of LCD panel)
Factory Set	(operating Initalization)
DSJ6000LW200209181500		(Model name, micom version)

* PW364 (Adjusting Brightness Contrast and White Balance of full Iinput)

Item	Initial Value	Description
S Bright	64	Screen Brightness	Fixing Value

S Contrast	64	Screen Contrast	Fixing Value

R Bias	63	Red Color of Low level signal	Adjusting Value

G Bias	63	Green Color of Low level signal	Adjusting Value

B Bias	63	Blue Color of Low level signal	Adjusting Value

R Gain	63	Red Color of Low High signal	Adjusting Value

G Gain	63	Green Color of Low High signal	Adjusting Value

B Gain	63	Blue Color of Low High signal	Adjusting Value

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AD9884 (Adjusting Brightness Contrast of DTV/ PC input )

R Gain	148		Fixing Value		RED MIN	148
G Gain	148		Fixing Value		RED MAX	148	Reading velue
B Gain	148		Fixing Value		GRN MIN	148	automatirally
CLP PL	4		Fixing Value		GRN MAX	148	accorling to
CLP DR	4		Fixing Value		BLU MIN	148	adjustment state
Phase	15		Fixing Value		BLU MAX	148


ITEM		Initial Value			Description

CXA1315A		42		Adjusting Red Color of Low level signal			Adjusting Value

CXA1315B		40		Adjusting Green Color of Low levelsignal			Adjusting Value

CXA1315C		40		Adjusting Blue Color of Low level signal			Adjusting Value

CXA2101 (Adjusting Brightness Contrast and White Balance of DTV input)

ITEM	Initial Value	Description

Picture	63	Contrast	Fixing Value

Bright	8	Brightness	Adjusting Value

R Drive	22	Adjusting Red Color of High level signal	Adjusting Value

G Drive	18	Adjusting Green Color of high levelsignal	Adjusting Value

B Drive	16	Adjusting Blue Color of high level signal	Adjusting Value

BLK BTM	15		Fixing Value

VPC3230 (Adjusting Brightness Contrast of TV / VIDEO / DVD input)

ITEM	Initial Value

Sub Bright	0	Adjusting Value

Sub Contrast	20	Adjusting Value

Test Pattern

R => G => B => W => BLK

Lamp Watt (160W is 25% brighter than 130W but lifetime of Lamp is shorter) 160W

130W

ENG Control (Adjusting LCD ENGINE UNIT )

GAMMA (NORMAL, Natural1, Natural2) : NORMAL(NO GAMMA compensation ),

	NATURAL1=NATURAL2
ROTATION	Scren Rotation (0, 90, 180, 270)
COLOR	Screen s color compensation
sub CPU	sub CPU s initalization in Engine Unit

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TEMP	Detecting the femperature in the inside of ENGINE
V-T	Engine V-T compensation

*Use Time : Total usage time of LCD panel *Factory Set (Operating Initalization)

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1. Specification / Feature

1-1. Product Specification

1-2. Product Feature

1-3. General Block Diagram

2. Power Supply

2-1. Summery

2-2. Block Diagram

2-3. Power structure

2-4. Power Action manual

3. Sound & Audio Amp

3-1. Summery

3-2. I/O Specification

3-3. Block Diagram

3-4. Action Manual

4. Video

4-1. Summery

4-2. Block Diiagram

4-3. Video Circuit Manual

4-4. *IF and Video Manual

5. Engine Drive

5-1. Summery

5-2. Block Diagram

5-3. Action Manual

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+ 27 hidden pages