Daewoo DLP-2612, DLP-3212 Schematic

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.

Service Manual

LCD TV

CHASSIS :

Model :

S/M NO. : DSL210PEF0

SL-210P

DLP-2612 DLP-3212

NOV. 2005

Contents

1. Safety Precaution 3

2. Product Specification

2-1. SPECIFICATION

2-2. Available Input Signal

3. BLOCK DIAGRAM

4. Description of Each BLOCK

4-1. Block Diagram of Main IC and TP

4-2. OVERVIEW

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

4-2-2. RF CVBS

4-2-3. DTV/DVD Signal

4-2-4. PC Signal

4-2-5. DVI Signal

4-2-6. Video Enhancer and LVDS transmitter

4-2-7. R/G/B PROCESSING (SCART1. TELETEXT R/G/B)

4-2-8. Audio signal processing, KEY and LED

4-3. POWER PCB

5. SERVICE MODE

5-1. Check initial Menu Data

5-2. Entering SERVICE MODE

6. White Balance Adjusting Method

7. Main PCBs Trouble Diagnosis

7-1. MAIN & SUB PCB Trouble Diagnosis

7-1-1. When No Signal or No raster

7-1-2. When No Sound

7-1-3. When Control KEY does not operate

7-1-4. When Remote Controller does not operate

7-2. POWER PCB

8. Trouble Diagnosis

8-1. Facts you must know when Diagnosis and Repairing

8-2. Typical Symptoms of PCB problem or bad connection

9. Structure of LCD Set

10. Service part list

10-1. DLP-2612APSB Part List

10-2. DLP-3212APSB Difference Part List

11. SCHEMATIC DIAGRAM

12. EXPLODED VIEW

-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 the 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, turn off the power (AC) to prevent 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 PCB are working as electric circuit GROUNDING, make sure to check if any screw is missing when assembling.

(5) A LCD Set contain different kind 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

2-1. SPECIFICATION

DLP-2612 DLP-3212

LCD Panel

Screen Size 26” 32” Aspect Ratio 16:9 16:9 Resolution 1366 768 (WXGA) 1366 768 (WXGA) Pixel Pitch 0.4215mm 0.51075mm Contrast Ratio 800:1 800:1

TV System Receiving System PAL, SECAM PAL, SECAM

Stereo System 2-Carrier/NICAM 2-Carrier/NICAM Channel Memory 99ch, Auto Preset 99ch, Auto Preset

INPUT Connector RF 75 Ohm Coaxial 75 Ohm Coaxial

S-Video 1 1 Scart 2 2 Component RCA 2 RCA 2 PC RGB D-Sub 1 D-Sub 1 PC Audio 3.5mm Mini-Jack 3.5mm Mini-Jack DVI 1 1

OUTPUT Connector Monitor-out 1 1

Headphone 3.5mm Mini-Jack 3.5mm Mini-Jack RF-out 1 1

SOUND OUTPUT 8W 8W Power Consumption Max. 140W 170W

Power Source 220-240V~50Hz 220-240V~50Hz

Dimension Set Dimension (850 518 231)mm (990 588.5 231) (W H D) (Contain Stand)

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2-2. Available Input Signal

RESOLUTION V-freq DVI D-SUB COMPONENT REMARK 640 480 60 IBM, VGA

66 APPLE, MAC66 72 VESA 75 VESA

720 400 70 IBM, VGA

85 IBM, XGA2

800 600 60 VESA

75 VESA

85 VESA 832 624 74 MAC74 1024 768 60 VESA

70 VESA 720P(1280 720) 50

60 1080i(1920 1080) 50

60 576P(704 576) 50 480P(720 480) 60 576i(704 576) 50 480i(720 480) 60

(2) VIDEO

- PAL, PAL-M, PAL-N

- NTSC, NTSC4.43

- SECAM

(1) PC/DVI/COMPONENT

-6-

Not Used

LCD 26", 32" (Europe ))

Block Diagram

DVI

D-SUB

COMPONENT1

SOUND1

SCART 2

AV1

SCART 1

S-VHS

PC(L,R)

Si1 169Si1 169

DVI RXDVI RX

TMDS

INPUT

BA7657BA7657

SWSW

MSP3410MSP3410

SOUND PROCESSORSOUND PROCESSOR

MST9883MST9883

AD CONVERTERAD CONVERTER

VPC3230VPC3230

COLOR DECODERCOLOR DECODER

PI5V330PI5V330

SWSW

PCF8574PCF8574

I/O

PCF8591PCF8591

AD/DAAD/DA

EL-LV385EL-LV385

LVDS TXLVDS TX

PANELPANEL

(SS/AUO)(SS/AUO)

TDA7480TDA7480

R, G, B, H, V

8M8M

SDRAMSDRAM

8M8M

SDRAMSDRAM

PANEL TV VSPPANEL TV VSP

PANEL TV SVPPANEL TV SVP

3D COMB/3D COMB/

COLOR DECODER/COLOR DECODER/

DE-INTERLADER/DE-INTERLADER/

SCALER/SCALER/

GUI/PIP/POPGUI/PIP/POP

DIGITALDIGITAL

IMAGEIMAGE

CXA1855CXA1855

AUDIO/VIDEO SWAUDIO/VIDEO SW

SW1

PC L,R

24 BIT R, G, B

8 BIT

H, V, CLK

SDA5, SCL5

MSP RESET

SDA 5550MSDA 5550M

MICOMMICOM

512K BYTE512K BYTE

FLASHROMFLASHROM

CVBS, Y, C OUT1

CVBS3, Y3, C3,

R3, L3

MONITOR CVBS OUT3

MAIN L,R

MONITOR

L, R

MONITOR L, R

CVBS2, R2, L2

RF CVBS OUT

SIF

CVBS1, Y1, C1, R1, L1

MAIN L, R

COMP1 L, R

RF L, R

24BIT R, G, B,

H, V, CLK

SVP RESET

PC L,R

Y, C, CVBS OUT2

VPC RESET

R, G, B, FB

TTX R, G, B, FB

R, G, B, FB

SW2

SDA5, SCL5

8BIT

PARALLEL

SDA5, SCL5

SDA33,

SDA5, SCL5

POWER FAIL

MSP_VDD5 (HP_ID)

S/SW1

S/SW2

Y, Cb, Cr

CVBS, H, V

AFT

SUB L, R

POWER

DOWN

MUTE

SW1

SW2

MSP_RESET

VPC RESET

BLK ON

DIMM PWM

MUTE

LCD ON

SDA5,

SCL5

2005.09.09

HP L,R

HP(L,R)

HP ID

RF CVBS

KEY

SVP RESET

POWER DOWN

Y, Cb, Cr

R, G, B, H,

J-L003J-L003

JEPICOJEPICO

VIDEOVIDEO

ENHANCEMENTENHANCEMENT

SDA 6000SDA 6000

TELETEXTTELETEXT

16M BIT16M BIT

FLASHROMFLASHROM

2M BYTE2M BYTE

SDRAMSDRAM

COMPONENT2

SOUND2

Y, Cb, Cr

MAIN

TUNER

SUB

TUNER

AFT

PI5V330PI5V330

SWSW

Y1,Cb1,Cr1

COMP2 L, R

COMP1

L, R

SUB CVBS

SW3

COMP2

L, R

Y2,Cb2,Cr2

MONO

PCF8574PCF8574

I/O

SDA5, SCL5

SW3

SPI

(CSB, JCLK, SI, SO)

S/SW2

S/SW1

3-1. MAIN BLOCK DIAGRAM

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3-2. POWER BLOCK DIAGRAM

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TP564 TP565 TP566

ICS2

TP603 TP604 TP605

PW30

TP159 TP160 JP11 TP161 TP246

PW11 TP162 TP247

TP248

JP12

PW12 TP494 TP508

TP495 TP509

PW7 TP496 TP529

PW15 JP3

PW6

PW21 PW20

P204

TP56 TP63

TP149 TP100 TP57 TP64

P601 TP101 TP58 TP67

TP144 TP102

PW602 TP103

TP143 TP120 TP104

TP121 TP105

TP106 TP107 TP108

TP141 TP109

JP201 JP202 TP27

TP29 TP19

IC201

IC604

IC603

TU1

ICA10

ICV10

JP206

IC601

ICU3

ICD10

ICL10

ICJ10

ICS3 ICS1

ICU10

ICU2

4-1. Block Diagram of main IC and TP

4-2. Overview

A/V block (Main and Sub PCB) is Multi Media circuit board that can process various input signals such as video, component, PC, DVI, and analog TV signal. It is mainly composed of switching, sync processing, decoding, analog TV, digital image processing, and system control part.

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

Y/C(S-Video) and SCART(CVBS) have similar signal paths. For the Main signal, IC201 receives these inputted signals and switches out a selected signal. Then the signal goes into ICV10 for video processing, SCART(RGB) signal goes directly into ICV10. The output of ICV10 goes through ICS1 for de-interlacing and digital image processing respectively. However, at PIP mode, sub signal has a little bit different path from the Main signal. First of all, IC201 receives input signals such as composite video, Y/C or etc, and switches out the selected signal like as the Main signal. But the selected signal goes into ICS1 for video processing and image processing instead of going into ICV10.

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- Main Signal A. IC201 : Switching IC (Input: analog inputs, Output:: an analog output) B. ICV10 : Color Decoder (Input: Y/C, CVBS, R/G./B, Output: 8bit digital, H/V) C. ICS1 : Color Decoder/Image Processor(Input: 8bit Digital or 24bit Digital R/G/B,

H/V,Output: 24bit Digital R/G/B, H/V)

-Main TP (Input: Color Bar Pattern)

★CCV15(Y Signal), CCV14(C Signal), CCV16(CVBS Signal) ★RCS12(Horizontal sync), RCS13(Vertical sync), RCS14(Clock) RCS15(Data enable)

-Sub Signal(In PIP mode) A. IC201: Switching IC (Input: analog inputs, Output: an analog output) B. ICS1: Color Decoder/Image Processor (Input: 8bit Digital or 24bit Digital R/G/B,

H/V,Output: 24bit Digital R/G/B, H/V)

Y signal (input to ICV10)

Location: LCV13

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

-10-

Color signal (input to ICV10)

Location: LCV4

CVBS signal (Input to ICV10)

Location: LCV1

Data Enable(Output of ICS1)

Loacation(RCS15, ICD10.73PIN)

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Horizontal sync (Out of ICS1)

Location: RCS12, ICD10.72PIN

Vertical sync (Out of ICS1)

Location: RCS13, ICD10.71PIN

Clock for display (Out of ICS1)

Location: RCS14, ICD10.76PIN

4-2-2. TV signal

Tuner(TU1) receives antenna signal and outputs CVBS and sound signal. For the main signal, IC201 switches out the CVBS and the rest of the signal flow is same as composite video signal flow mentioned earlier. Also, Sub TV signal at PIP mode flows similar path to the Sub composite video signal pass except that IC201 switches out the CVBS signal

-12-

- Flow Chart of RF CVBS

- Main Signal A. TU1 : Tuner (Input: antenna signal, Output: CVBS) B. IC201 : Switching IC (Input: CVBS, Output: CVBS) C. ICV10 : Vided processor (Input: CVBS, Output: 8bit Digital, H/V) D. ICS1 : Color Decoder/Image Processor(Input: 24bit Digital R/G/B, H/V, Output: 24bit

Digital R/G/B, H/V)

- Sub Signal(In PIP mode) A. IC201 : Switching IC (Input Input: antenna signal, Output: CVBS) B. ICS1 : Color Decoder/Image Processor(Input: 24bit Digital R/G/B, H/V, Output: 24bit

Digital R/G/B, H/V)

- Main TP (Input: Color Bar Pattern)

★ CE220, CCV16 ★ RCS12(Horizontal sync), RCS13(Vertical sync), RCS14(Clock) RCS15(Data enable)

CVBS signal (Input to IC201)

4-2-3. DTV/DVD signal

Both DTV(Y, Pb, Pr) and DVD(Y, Cb, Cr) share same jack and signal path. Main and Sub in PIP mode have same path. ICI3 switches out signal and also detects type of signal so that ICA10 can convert the analog signal to digital. Then the signal goes through ICS1 for the image processing.

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- Flow Chart of COMPONENT

Y signal (Input to ICA10)

Location: LCA4, RCA12

Pb Signal (Input to ICA10)

Location: LCA5, RCA14

- Main Signal A. ICI3 : Switching IC (Input: Component, Output: Component, H/V) B. ICA10 : A/D converter (Input: Component, H/V, Output: 24bit Digital RGB, H/V) C. ICS1 : Color Decoder/Image Processor(Input: 24bit Digital R/G/B, H/V,Output: 24bit

Digital R/G/B, H/V)

- Main TP (Input: 576I, Color Bar Pattern)

-14-

Pr Signal (Input to ICA10)

Location: LCA3, RCA11

Clock (Output of ICA10) Location: LCA1, RCA10

Horizontal sync (Output of ICA10)

Location: RCA9

-15-

Vertical sync (Output of ICA10)

Location: RCA8

4-2-4. PC (Personal Computer) signal

PC signal is switched out by ICI3 and input to ICA10 for A/D conversion. Then the signal goes through ICS1 for digital image processing.

- Flow Chart of PC Signal

- Main IC A. ICI3 : Switching IC (Input: Analog RGB, H/V, Output: Analog RGB, H/V) B. ICA10 : A/D converter (Input: Analog RGB, H/V, Output: 24bit Digital RGB, H/V) C. ICS1 : Color Decoder/Image Processor(Input: 24bit Digital R/G/B, H/V, Output: 24bit

Digital R/G/B, H/V)

- Main TP (Input: Color Bar Pattern, 1024X768 60Hz)

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R Signal (Input to ICA10)

Location: LCA3, RCA11

G Signal (Input to ICA10)

Location: LCA4, RCA12

B Signal (Input to ICA10)

Location: LCA5, RCA14

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Clock (Output of ICA10) Location: LCA1, RCA10

Horizontal sync (Output of ICA10)

Location: RCA9

Vertical sync (Output of ICA10)

Location: RCA8

4-2-5 DVI (Digital Visual Interface) signal

To process DVI signal, graphic card of AV device reads EDID data from ICI5(ROM). Then DVI signal is directly inputted to ICD10, which output digital 24bit RGB and H/V. The output goes through ICS1 for digital image processing

-18-

- Flow Chart of DVI Signal

- Main IC A. ICI5 : ROM containing EDID data (EDID: display capabilities such as resolution, aspect

ratio etc.)

B. ICD10: DVI signal processor (Input: TMDS, Output: 24bit digital RGB, H/V)

- Main TP (Input: Color Bar Pattern)

Clock (Output of ICD10)

Location: LCD5, RCD5

Horizontal sync (Output of ICD10)

Location: RCD6

- Main IC A. ICI5 : ROM containing EDID data (EDID: display capabilities such as resolution, aspect

ratio etc.)

B. ICD10: DVI signal processor (Input: TMDS, Output: 24bit digital RGB, H/V)

- Main TP (Input: Color Bar Pattern)

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Vertical sync (Output of ICD10)

Location: RCD7

4-2-6. Video Enhancer and LVDS transmitter (for all inputs)

Outputs of ICS1 are inputted to ICJ10(Video signal enhancer, MGDI) which improves picture quality greatly. Outputs of ICJ10 are inputted to ICL10 which is a LVDS transmitter. The converted LVDS signal is transmitted to the LCD panel.

- Main IC A. ICJ10: Video enhancer (Input: 24bit digital RGB, H/V Output: 24bit digital RGB, H/V) B. ICL10: LVDS transmitter (Input: 24bit digital RGB, H/V Output: LVDS signal)

- Main TP

★ RCJ2: Horizontal sync (Output of ICJ10), refer to RCS12 ★ RCJ3: Vertical sync (Output of ICJ10), refer to RCS13 ★ RCJ1 : Data Enable sync (Output of ICJ10), refer to RCS15

4-2-7. R/G/B PROCESSING (SCART1, TELETEXT R/G/B)

- Flow Chart of SCART1, TELETEXT R/G/B

- Main TP

-20-

R Signal (Input to ICV10) Location: LCV10, RCV30

G Signal (Input to ICV10)

Location: LCV9, RCV28

B Signal (Input to ICV10)

Location: LCV8, RCV26

4-2-8. Audio signal processing, KEY, and LED

IC201 switches Audio signals and passes a switched signal to IC601 for audio signal processing. IC601 controls sound parameters such as Volume, Balance, and Equalize.

-21-

- Flow Chart of Audio Signal

- Main IC A. IC201: Switching IC B. IC601: Audio processing IC C. IC603,604: Amplifying IC

MSP3410 INPUT Location

- Main R sound: CE620, RC621 - Main L sound: CE619, RC620

- Sub R Sound: CE618, RC619 - Sub L Sound: CE617, RC618

- Component1 R sound: CE616, RC617 - Component1 L sound: CE615, RC616

- Component2 R sound: CE614, RC615 - Component2 L sound: CE613, RC614

PC_L Sound (Input to IC201)

Location (CE208, RC253)

The outputs of IC601 are passed to IC604(right), and IC603(left) respectively to amplify the signals. KEY and LED PCBs send signals received from key buttons and LED to ICU10 for command processing.

-22-

IC604, 605 INPUT

Location: L out(CE605), R out(CE604)

Tuner SIF Input

Location: CC613, TU1.9PIN

HEADPHONE Out

Location: CE636, CE639

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Remote control signal

Location: RCW17, CCW3

4-3. POWER PCB

4-3-1. POWER SPEC

Rating: 220V~240V Regulating Method: Input Frequency: 50Hz Inrush Current: Below 80A at AC230V Output Voltage and Current are shown below

Board

Output Minimum output Maximum output Output Current

Condition

Voltage voltage voltage Continuous +24Vdc

+22.8Vdc +25.2Vdc

0-6.0A

(

5%) (144Watt)

+15Vdc

+14.25Vdc +15.75Vdc

0-1.0A

( 5%) (30Watt) PWR-CTL

DEP +6Vdc

+5.7Vdc +6.3Vdc

0-4.0A ON

( 5%) (24Watt)

+5Vdc

+4.75Vdc +5.25Vdc

0-2.5A

( 5%) (12.5Watt)

ST+5Vdc

+4.75Vdc +5.25Vdc

0-1.0A PWR-CTL

( 5%) (5Watt) OFF

-24-

Ripple and Noise

Output

Output voltage

AC ripple, Switching

Condition

ripple and noise

Name Minimum output Maximum output

Continuous

voltage voltage +24V 22.8Vdc 25.2Vdc PWR-CTL +15V 14.25Vdc 15.75Vdc 500mVp-p ON

+6V 5.7Vdc 6.3Vdc Max Load +5V 4.75Vdc 5.25Vdc

ST+5V 4.75Vdc 5.25Vdc 500mVp-p PWR-CTL

Other Lines Don’t Care OFF

4-3-2. Connectors

A. AC Connectors

P801 (I-SHENG PLASTIC 7003 7.0MM 3P) Power Switch Connector

P802 (YEON-HO YDW236-02P)

PIN NO. CONFIGRATION

1 LIVE Switch PIN1 2 LIVE Switch PIN2

B. PL11, PL12 pin Spec (HAN JUN A2002WV2-14P 14p)

PIN NO. OUT PUT

1 +24V 2 +24V 3 +24V 4 +24V 5 +24V 6 GND 7 GND 8 GND

9 GND 10 GND 11 Not Connected 12 INV ON/OFF 13 GND 14 PWM-DIMMING

PL11(SAMSUNG PANNEL)

PIN NO. OUT PUT

1 +24V 2 +24V 3 +24V 4 +24V 5 +24V 6 GND 7 GND 8 GND

9 GND 10 GND 11 GND 12 INV ON/OFF 13 PWM-DIMMING 14 GND

PL12(AUO)

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