Daewoo DLT22W4 Schematic

S/M NO. : DSL150TP00

Service Manual

19”,20”,22” LCD TV

CHASSIS: SL-150T/150P

Model: DLT-19W4 / DLP-19W4 DLT-22W4 / DLP-22W4 DLT-20J1 / DLP-20J1M DLT-20J3 / DLP-20J3M DLT-20J9 / DLP-20J9M DLT-19L1 / DLP-19L1 DLT-19L2 / DLP-19L2 DLT-22L1 / DLP-22L1 DLT-22L2 / DLP-22L2

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.

JAN. 2008

Contents

I. Parts with the exception of MODULE

1. Safety Precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2. Product Speciﬁcation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

4. Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

5. PCB Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

6. Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

7. Service Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

8. Diﬀerent part list for models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

9. Electrical Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

10. Out Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

11. Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

12. Software Install & Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

13. SVC keys function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

* Remarks

Points from 3 show data for DLT models. For DLP models diﬀrent part list for models (point 8) must be used.

1. Safety Precautions

(1) When moving or laying down a LCD Set, at least two people must work together. Avoid any

impact towards the LCD Set.

(2) Do not leave a broken LCD Set on for a long time. To prevent any further damages, after

checking the condition of the broken Set, make sure to turn the power (AC) oﬀ.

(3) When opening the BACK COVER, you must turn oﬀ power (AC) to prevent any electric

shock.

(4) When loosening screws, check the position and type of the screw. Sort out the screws and

store them separately for reassembling. Because screws holding PCBs are working as electric circuit grounding, make sure to check if any screw is missing when assembling / reassembling. Do not leave any screws inside the set.

(5) A LCD Set contains diﬀerent kinds of connector cables. When connecting or disconnecting

cables, check the direction and position of the cable beforehand.

(6) Connect/disconnect the connectors slowly with care especially FFC (ﬁlm) cables and FPC

cables. Do not connect or disconnect connectors instantaneously with force, and handle them carefully for reassembling.

(7) Connectors are designed so that if the number of pins or the direction does not match,

connectors will not ﬁt. When having problem in plugging the connectors, check their kind, position, and direction.

2. Product Speciﬁcations

Model DLT-19W4 / DLP-19W4 DLT-20Jx / DLP-20JxM DLT-22W4 / DLP-22W4

Screen Size 480mm (diagonal) 510.54mm (diagonal) 558.673mm (diagonal)

Display Colour 16.7 M

Aspect Ratio 16:10 4:3 16:10

Resolution 1440 x 900 (WXGA+) 640 x 480 (VGA) 1680 x 1050 (WSXGA+)

Pixel Pitch 0.2835 x 0.2835 0.6375 x 0.6375 0.2835 x 0.2835 Contrast Ratio 1000:1 350:1 1000:1 Appearance

(W x H x D) Weight

(Net) Power Consumption 42W / 39W 52W / 49W 50W / 46W Sound Output 2.0W + 2.0W

Terminals

Reception Channel

Power Source AC 220 ~ 240V, 50Hz

The following picture formats is available:

w/o stand

with stand

w/o stand

with stand

RF, AV1, AV2 MODE

COMPONENT, HDMI, PC

DVB-T MODE

476.3 x 346 x 80 514 x 460 x 85 545.4 x 400 x 81

476.3 x 401.5 x 190 514 x 498 x 239 545.4 x 426 x 190

4.9 Kg 7.0 Kg 5.6 Kg

5.2 Kg 8.0 Kg 5.9 Kg

AV IN : SCART, COMPOSITE VIDEO, AUDIO L/R, COMPONENT, PC, HDMI HEADPHONE : 3.5mm STEREO MINI-JACK DIGITAL AUDIO OUT: Coaxial ANT. IN : COAXIAL-TYPE

VHF BAND I : CH2-CH4 BAND II : CH5-CH12 UHF HYPER BAND : SI’-S3’, S1-S20 BAND IV, V : CH21-CH68 PAL-B/G, D/K, SECAM-L/L’, NTSC(AV input only)

WIDE, FULL SCREEN

4:3, FULL SCREEN

FULL SCREEN

WIDE, FULL SCREEN

4:3, FULL SCREEN

PC Input resolution in LCD

Resolution V-Freq

640 x 480 60Hz o o o o 800 x 600 60Hz o o x x 1024x768 60Hz o o x x

1280x768 60Hz o x x x

1440 x 900 60Hz o x x x

DLT/P-19W4, 22W4 DLT/P-20J1, 20J3, 20J9

PC(D-Sub) HDMI PC(D-Sub) HDMI

Multimedia input resolution table in LCD

Resolution V-freq

720 x 480i 60Hz oxox

720 x 480p 60Hz o o o o

720 x 576i 60Hz oxox

720 x 576p 60Hz o o o o

1280 x 720p

1920 x 1080i

50Hz o o o o 60Hz o o o o 50Hz o o o o 60Hz o o o o

DLT/P-19W4, 22W4 DLT/P-20J1, 20J3, 20J9

Component HDMI Component HDMI

Remark

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3. Block Diagram (Main)

* DLT model only

Block Diagram (Power Lips)

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4. Schematic Diagram (DLT-19W4, DLT-22W4)

Schematic Diagram (DLT-20J1, DLT-20J3)

Schematic Diagram

This page can be used only for DLT models

Schematic Diagram

5. PCB Data (DLT-19W4, DLT-22W4 - TOP)

PCB Data (DLT-19W4, DLT-22W4 - BOTTOM)

PCB Data (DLT-20J1, DLT-20J3 - TOP)

PCB Data (DLT-20J1, DLT-20J3 - BOTTOM)

PCB Data (DLT-19W4, DLT-22W4 - Control PCB - TOP)

PCB Data (DLT-19W4, DLT-22W4 - Control PCB - BOTTOM)

PCB Data (DLT-20J1, DLT-20J3 - Control PCB - TOP )

PCB Data (DLT-20J1, DLT-20J3 - Control PCB - BOTTOM)

6. Trouble Shooting

* Facts you must know at trouble diagnosis or repairing

(1) The trouble diagnosis and repairing of set means Module . In other words, ﬁnd out which PCB modules are not working and replace them with normal PCB

modules.

(2) This TROUBLE SHOOTING list only contains representative and simple PCB trouble diagnosis and

Module Exchange method. Therefore, if you ﬁnd Sets which are diﬃcult to diagnose or to repair, contact Daewoo Electronics.

(3) Basic TROUBLE SHOOTING procedure : Check Trouble Symptoms Detach Back Cover Trouble Diagnosis Replace broken PCB module

Adjust ADC Function Check Repair Complete.

(4) Required equipments for trouble diagnosis

- Digital Multi-meter (measure Dc voltage, measure Diode Voltage, Short-Open test)

- Screwdriver (or electric screwdriver), plastic adjusting tool

(5) Before assemble/disassemble PCBs, check to see if AC Switch is OFF.

(6) After Back cover is closed, redo Heat-run for at least one hour by inputting Full white pattern.

Symptoms of power, inverter, panel Trouble

<Symptom.1> Not even weak discharge (luminescence) shows on screen.

<Symptom.2> Discharge (luminescence) on screen is unstable

<Symptom.3> Set is producing unusual noise Symptoms of VIDEO or JACK PCB Trouble

<Symptom.1> Only weak discharge (luminescence) shows on screen, but No Data is on screen

<Symptom.2> Screen DATA is abnormal

<Symptom.3> Particular input signal (Video, etc.) does not operate

<Symptom.4> No SOUND

<Symptom.5> Remote Control or KEY does not operate

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