Daewoo SJ-210 Service Manual

Service Manual

LCD PROJECTION TV

(HDTV MONITOR)

CHASSIS : SJ-210

Model : DSJ-6000LN

S/M No. : DSJ210BEF0

Nov. 2002

DAEWOO ELECTRONICS Corp.

http : //svc.dwe .co.kr

✔

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).

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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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- 5 -

- 6 -

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.
MENU 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

TV VIDEO 1 VIDOE 2 VIDEO 3 DVD TV
PC/DTV PC 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.
PREV 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

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.(20 20)) 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.(20

20)) 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

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’.

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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

* 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

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)

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AD9884 (Adjusting Brightness Contrast of DTV/ PC input )

CXA2101 (Adjusting Brightness Contrast and White Balance of DTV 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

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