Daewoo DLP-26C2 Bedienungsanleitung

Service Manual

LCD TV

CHASSIS : SL-500P

Model : DLP-26C2

DLP-26C3

DLP-32C1

DLP-32C2

DLP-32C3

DLP-32C5

DLP-32C6

DLP-32C7

DLP-37C3

DLP-37C7

S/M NO. : DSL500PEF0

Aug. 2007

Contents

1.Safety Precaution ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 3

2.Product Specification ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 4

2-1.Product Specification⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 4

2-2.Available Input Signal ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 5

3.Block Diagram ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 6

4.Description of Each Block ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 8

4-1.Block Diagram of Main IC and TP ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 8

4-2.Overview ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 9

4-2-1.Composite video, Y/C(S-Video) and SCART(CVBS, RGB) composite video ⋯9

4-2-2.DTV/DVD signal ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 11

4-2-3.PC(Personal Computer)signal ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 13

4-2-4.HDMI signal ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 15

4-2-5.R/G/B Processing(SCART1, TELETEXT R/G/B) ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 15

4-2-6.Audio signal processing, KEY, and LED ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 17

4-3.POWER PCB ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 22

5.SERVICE MODE ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 24

5-1.Entering SERVICE MODE ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 24

6.Main PCBs Trouble Diagnosis ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 26

6-1.Main PCBs Trouble Diagnosis⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 26

6-1-1.Common checking process when “No signal of Noraster” ⋯⋯⋯⋯⋯⋯⋯⋯⋯ 26

6-1-2.When No Sound ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 33

6-1-3.When Control Key does not operate⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 35

6-1-4.When Remote Controller does not operate⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 36

6-2.POWER PCB ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 38

7.Trouble Diagnosis⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 39

7-1.Facts you must know when Diagnosis or Repairing⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 39

7-2.Typical Symptoms of PCB problem or bad connection ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 40

8.Structure of LCD Set ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 41

9.Exploded View ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 43

10.Service Part List ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 52

11.Circuit Diagram ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯100

-2-

-3-

1. Safety Precautions

(1) When moving or laying down a LCD Set, please deal with care. 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

check the broken Set’s condition, 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 connecting position and type of the screw.

Sort out the screws and store them separately

Because screws holding PCBs are working as electric circuit grounding,

make sure to check if any screw is missing when assembling.

(5) A LCD Set contains different kinds of connector cables.

When connecting or disconnecting connector cables, check the direction and position

of the cable beforehand.

(6) When disconnecting connectors unplug the connectors slowly with care.

(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, make sure to check their kind, position,

and direction.

-4-

2. Product Specification

Features

LCD Panel

TV System

Input

Connector

Output

Connector

Sound

Output

Power

Consumption

Dimension

(W x H x D)

Screen Size

Aspect Ratio

Resolution

Pixel Pitch

Contrast

Ratio

Receiving

System

Stereo

System

26” 32”

16 : 9

1200 : 1

PAL, SECAM PAL, SECAM

FM MONO /

2-Carrier, NICAM FM MONO /

2-Carrier, NICAM

Channel

Memory ANALOG : 0~99CH

75 Ohm Coaxial

S-Video 1

SCART 2

ANALOG : 0~99CH

75 Ohm Coaxial

Component RCA X 1

PC RGB D-Sub X 1

PC Audio 3.5mm Mini-Jack

Headphone 3.5mm Mini-Jack

10W

100W 115W

812 x 502.7 x 240

Max

Power

Source

Set

Dimension

180VAC ~ 264VAC,

50~60Hz

806 x 628.5 x 250

180VAC ~ 264VAC,

50~60Hz

806 x 628.5 x 250 940 x 720 x 328.7

180VAC ~ 264VAC,

50~60Hz 180VAC ~ 264VAC,

50~60Hz

HDMI 1

RCA X 1

D-Sub X 1

FM MONO /

2-Carrier, NICAM FM MONO /

2-Carrier, NICAM

ANALOG : 0~99CH ANALOG : 0~99CH

75 Ohm Coaxial 75 Ohm Coaxial

RCA X 1 RCA X 1

D-Sub X 1 D-Sub X 1

3.5mm Mini-Jack

10W

135W 150W

3.5mm Mini-Jack 3.5mm Mini-Jack

10W 10W

1366x768(WXGA)

0.421(H) x

0.140(W)*3mm

800 : 1

PAL, SECAM PAL, SECAM

800 : 1 800 : 1

1366x768(WXGA) 1366x768(WXGA) 1366x768(WXGA)

170.25um x

510.75um x RGB 0.51075(H) x

0.17025(W)*3 0.200mm x

0.600mm x RGB

16 : 9 16 : 9 16 : 9

32” 37”

DLP-26C2SMDB DLP-32C6LMBD DLP-37C3LMBDDLP-32C6SMBD

2-1.PRODUCT SPECIFCATION

-5-

Product Specification

2-2.Available Input Signal

2-2-1.HDMI/PC/COMPONENT

2-2-2.VIDEO

- PAL, PAL-M, PAL-N

- NTSC, NTSC4.43

- SECAM

Resolution

640 x 480

800 x 600

1024 x 768

1360 x 768

720 x 480

720 x 480i

720 x 576i

720 x 576

1280 x 720

1920 x 1080i

V-freg

60Hz

HDMI

OOX

72Hz

75Hz

60Hz

72Hz

75Hz

60Hz

70Hz

75Hz

60Hz

75Hz

60Hz

50Hz

60Hz

50Hz

60Hz

50Hz

OOX

PC(D-Sub) Component Standard

VESA Standard

-6-

3. Block Diagram

-7-

Block Diagram

-8-

4. Description of Each Block

4-1.Block Diagram of Main IC and TP

-9-

Description of Each Block

4-2.Overview

Digital PCB is Multi Media circuit board that can process carious input signals such

as Video, component, PC, HDMI, and analog TV signal.

4-2-1.Composite video, Y/C(S-Video) and SCART(CVBS, RGB) composite video

-Flow Chart of RF, Video, S-Video Signal

Y-pb-pr

Scart1-rgb-fb

R-G-B

Tuner Cvbs

HDMI

TMDS-IN

AV3-Y/C

U13

MST96889LD

Scart1-Cvbs

LVDS

Scart1-Cvbs

AV3-Cvbs

-10-

Description of Each Block

Color signal(input to U13)

Location:R204

Y signal(input to U13)

Location:R206

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