Daewoo DTX-21G2 Manuel utilisateur

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

COLOR Television

CHASSIS :

Model :

CP-520V

DTX-21G2/21B4/21U7

P/N:TCP520VEF0

Dec. 2006

CP-520V Service Manual

CONTENTS

DOCUMENT HISTORY 3

1 MAIN FEATURES 4

1.1 SPECIFICATIONS 4

1.1.1 GENERAL 4

1.1.2 EURO-SCART 1 (21 Pin) 4

1.1.3 EURO-SCART 2 (21 Pin) 5

1.2 CHANNEL/FREQUENCY TABLE 6

2 SAFETY INSTRUCTION 9

3 ALIGNMENT INSTRUCTIONS 10

3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE 10

3.2 SERVICE MODE NAVIGATION 10

3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS 10

3.4 OPTION 1 11

3.5 OPTION 2 11

3.6 NVM DEFAULT SETTING 12

3.7 TV SET ALIGNMENT 14

3.7.1 G2 ALIGNMENT 14

3.7.2 WHITE BALANCE 14

3.7.3 FOCUS 14

3.7.4 VERTICAL GEOMETRY 14

3.7.5 HORIZONTAL PICTURE CENTRING 14

3.7.6 AGC 14

4 IC DESCRIPTION 15

4.1 UOC III SERIES 15

4.1.1 IC MARKING AND VERSION 15

4.1.2 BLOCK DIAGRAM 16

4.1.3 PINNING 17

4.1.4 FEATURES 20

4.2 LA42032 STEREO AUDIO AMPLI FIER 23

4.2.1 FEATURES 24

4.3 LA78040 VERTICAL AMPLIFIER 26

4.3.1 FEATURES 26

4.4 24WC16 - 16 KB EEPROM 28

4.5 STR - W6754 29

4.5.1 GENERAL DESCRIPTION 29

4.5.2 FEATURES 29

4.5.3 BLOCK DIAGRAM 29

4.5.4 PIN DESCRIPTION 30

4.5.5 CONTROL PART - ELECTRICAL CHARACTERISTICS 30

CP-520V Service Manual

5 CIRCUIT DESCRIPTION 32

5.1 BLOCK DIAGRAM 32

5.2 FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR 33

5.2.1 Vision IF amplifier 33

5.2.2 QSS sound circuit 33

5.2.3 FM demodulator 33

5.2.4 Audio input selector and volume contro 34

5.2.4.1 STEREO AND AV STEREO VERSIONS 34

5.2.4.2 MONO VERSIONS 34

5.2.5 CVBS and Y/C input signal selection 34

5.2.5.1 ALL VERSIONS 34

5.2.6 Synchronisation circuit 35

5.2.7 Horizontal and vertical drive 36

5.2.8 Chroma, luminance and feature processing 36

5.2.9 Colour decoder 37

5.2.10 RGB output circuit 38

5.2.11 I2C-BUS USER INTERFACE DESCRIPTION 40

5.3 GENERAL DESCRIPTION OF THE TV SOUND OF SOUND PROCESSOR 40

5.3.1 Supported standards 41

5.4 FUNCTIONAL DESCRIPTION SOUND PROCESSOR 42

5.4.1 The UOC III TV Sound Concept 42

5.4.2 Functional Overview Of the digital controller sound part 43

5.4.3 Demodulator and decoder 44

6 SERVICE PARTS LIST 47

6.1 DTX-21G2FZP-SB 47

7 EXPLODED VIEW 52

7.1 DTX-21G2 52

7.2 DTX-21B4 53

7.3 DTX-21U7 54

8 PRINTED CIRCUIT BOARD 55

8.1 4859813693(OLD PCB) 55

8.2 4859816393(NEW PCB) 56

9 SCHEMATIC DIAGRAM 57

9.1 CP-520V 57

CP-520VService Manual

DOCUMENT HISTORY

VERSION DATE COMMENTS

V1.46 07/07/06 Creation of document (Author JS KIM)for project CP520 50Hz TV.

CP-520VService Manual

1MAIN FEATURES

1.1 SPECIFICATIONS

1.1.1 GENERAL

TV standard PAL -SECAM B/G D/K, PAL I/I, SECAM L/L’

Tuner PAL, SECAMColour system AV PAL, SECAM, PAL 60, NTSC M, NTSC 4.43

Sound system NICAM B/G, I, D/K, L,

FM 2Carrier B/G, D/K

Power

consumption

59W

Sound Output

Power 4.5W x 2 (at 60% mod, 10% THD)

Speaker 12W 8 ohm x2

Teletext system 10 pages memory FASTEXT (FLOF or TOP)

Aerial input 75 ohm unbalanced

Channel coverage Off-air channels, S-cable channels and hyperband

Tuning system frequency synthesiser tuning system

Visual screen size 51cm

Channel indication On Screen Display

Program Selection 100 programmes

Aux. terminal EURO-SCART 1 : Audio / Video In and Out, R/G/B

In, Slow and Fast switching.

EURO-SCART 2 : Audio / Video In and Out, SVHS

In.

AV3 : Audio-Video Jack on front of cabinet.

Headphone jack (3.5 mm) on front of cabinet

SVHS3 (option) : Jack on front of cabinet –sound

input common with AV3.

Remote Control

Unit R-49C10

1.1.2 EURO-SCART 1 (21 Pin)

Pin Signal Description Matching value

1Audio Output Right 0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod )

2Audio Input Right 0.5 Vrms, Impedance > 10 kΩ

3Audio Output Left 0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod )

4Audio Earth

5Blue Earth

6Audio Input Left 0.5 Vrms, Impedance > 10 kΩ

7Blue Input 0.7 Vpp ±0.1V, Impedance 75Ω

CP-520VService Manual

8Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , Impedance

> 10 kΩ

9Green Earth

10 N.C.

11 Green Input 0.7 Vpp ±0.1V, Impedance 75Ω

12 N.C.

13 Red Earth

14 Blanking Earth

15 Red Input 0.7 Vpp ±0.1V, Impedance 75Ω

16 Fast Switching 0 to 0.4V : Logic “0”, 1 to 3V : Logic “1”, Impedance 75Ω

17 Video Out Earth

18 Video In Earth

19 Video Output 1 Vpp ±3dB, Impedance 75Ω

20 Video Input 1 Vpp ±3dB, Impedance 75Ω

21 Common Earth

1.1.3 EURO-SCART 2 (21 Pin)

Pin Signal Description Matching value

1Audio Output Right 0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod )

2Audio Input Right 0.5 Vrms, Impedance > 10 kΩ

3Audio Output Left 0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod )

4Audio Earth

5Earth

6Audio Input Left 0.5 Vrms, Impedance > 10 kΩ

7N.C.

8N.C.

9N.C.

10 N.C.

11 N.C.

12 N.C.

13 Earth

14 Earth

15 Chroma Input ±3dB for a luminance signal of 1 Vpp

16 N.C.

17 Earth

18 Video In Earth

19 Video Output 1 Vpp ±3dB, Impedance 75Ω( Monitor output )

20 Video Input, Y In. 1 Vpp ±3dB, Impedance 75Ω

21 Common Earth

CP-520VService Manual

1.2 CHANNEL/FREQUENCY TABLE

CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT

C01 46.25 -45.75 49.75

C02 48.25 55.75 (L') 53.75 59.25

C03 55.25 60.5 (L') 61.75 77.25

C04 62.25 63.75 (L') 175.25 85.25

C05 175.25 176.00 183.25 93.25

C06 182.25 184.00 191.25 175.25

C07 189.25 192.00 199.25 183.25

C08 196.25 200.00 207.25 191.25

C09 203.25 208.00 215.25 199.25

C10 210.25 216.00 223.25 207.25

C11 217.25 189.25 (LUX) 231.25 215.25

C12 224.25 69.25 (L') 239.25 223.25

C13 53.75 76.25 (L') 247.25 -

C14 -83.25 (L') 49.75 -

C15 82.25 90.25 57.75 -

C16 -97.25 65.75 -

C17 183.75 -77.75 -

C18 192.25 -85.75 -

C19 201.25 ---

C20 ----

C21 471.25 471.25 471.25 471.25

C22 479.25 479.25 479.25 479.25

C23 487.25 487.25 487.25 487.25

C24 495.25 495.25 495.25 495.25

C25 503.25 503.25 503.25 503.25

C26 511.25 511.25 511.25 511.25

C27 519.25 519.25 519.25 519.25

C28 527.25 527.25 527.25 527.25

C29 535.25 535.25 535.25 535.25

C30 543.25 543.25 543.25 543.25

C31 551.25 551.25 551.25 551.25

C32 559.25 559.25 559.25 559.25

C33 567.25 567.25 567.25 567.25

C34 575.25 575.25 575.25 575.25

C35 583.25 583.25 583.25 583.25

C36 591.25 591.25 591.25 591.25

C37 599.25 599.25 599.25 599.25

C38 607.25 607.25 607.25 607.25

C39 615.25 615.25 615.25 615.25

C40 623.25 623.25 623.25 623.25

C41 631.25 631.25 631.25 631.25

C42 639.25 639.25 639.25 639.25

C43 647.25 647.25 647.25 647.25

C44 655.25 655.25 655.25 655.25

C45 663.25 663.25 663.25 663.25

CP-520VService Manual

C46 671.25 671.25 671.25 671.25

C47 679.25 679.25 679.25 679.25

C48 687.25 687.25 687.25 687.25

C49 695.25 695.25 695.25 695.25

C50 703.25 703.25 703.25 703.25

C51 711.25 711.25 711.25 711.25

C52 719.25 719.25 719.25 719.25

C53 727.25 727.25 727.25 727.25

C54 735.25 735.25 735.25 735.25

C55 743.25 743.25 743.25 743.25

C56 751.25 751.25751.25 751.25

C57 759.25 759.25 759.25 759.25

C58 767.25 767.25 767.25 767.25

C59 775.25 775.25 775.25 775.25

C60 783.25 783.25 783.25 783.25

C61 791.25 791.25 791.25 791.25

C62 799.25 799.25 799.25 799.25

C63 807.25 807.25 807.25 807.25

C64 815.25 815.25 815.25 815.25

C65 823.25 823.25 823.25 823.25

C66 831.25 831.25 831.25 831.25

C67 839.25 839.25 839.25 839.25

C68 847.25 847.25 847.25 847.25

C69 855.25 855.25 855.25 855.25

C70 863.25 863.25 863.25 863.25

C71 69.25 ---

C72 76.25 ---

C73 83.25 ---

C74 90.25 ---

C75 97.25 ---

C76 59.25 ---

C77 93.25 ---

S01 105.25 104.75 103.25 105.25

S02 112.25 116.75 111.25 112.25

S03 119.25 128.75 119.25 119.25

S04 126.25 140.75 127.25 126.25

S05 133.25 152.75 135.25 133.25

S06 140.25 164.75 143.25 140.25

S07 147.25 176.75 151.25 147.25

S08 154.25 188.75 159.25 154.25

S09 161.25 200.75 167.25 161.25

S10 168.25 212.75 -168.25

S11 231.25 224.75 -231.25

S12 238.25 236.75 -238.25

S13 245.25 248.75 255.25 245.25

S14 252.25 260.75 263.25 252.25

S15 259.25 272.75 271.25 259.25

S16 266.25 284.75 279.25 266.25

S17 273.25 296.75 287.25 273.25

CP-520VService Manual

S18 280.25 136.00 295.25 280.25

S19 287.25 160.00 303.25 287.25

S20 294.25 --294.25

S21 303.25 303.25 -303.25

S22 311.25 311.25 311.25 311.25

S23 319.25 319.25 319.25 319.25

S24 327.25 327.25 327.25 327.25

S25 335.25 335.25 335.25 335.25

S26 343.25 343.25 343.25 343.25

S27 351.25 351.25 351.25 351.25

S28 359.25 359.25 359.25 359.25

S29 367.25 367.25 367.25 367.25

S30 375.25 375.25 375.25 375.25

S31 383.25 383.25 383.25 383.25

S32 391.25 391.25 391.25 391.25

S33 399.25 399.25 399.25 399.25

S34 407.25 407.25 407.25 407.25

S35 415.25 415.25 415.25 415.25

S36 423.25 423.25 423.25 423.25

S37 431.25 431.25 431.25 431.25

S38 439.25 439.25 439.25 439.25

S39 447.25 447.25 447.25 447.25

S40 455.25 455.25 455.25 455.25

S41 463.25 463.25 463.25 463.25

CP-520VService Manual

2SAFETY INSTRUCTION

WARNING: Only competent service personnel may carry out work involving the testing or repair

of this equipment.

X-RAY RADIATION PRECAUTION

1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid

such hazards, the high voltage must not exceed the specified limit. The nominal value of the high

voltage of this receiver is 25KV at max beam current.

The high voltage must not, under any circumstances, exceed 29KV.

Each time a receiver requires servicing, the high voltage should be checked. It is important to

use an accurate and reliable high voltage meter.

2. The only source of X-RAY Radiation in this TV receiver is the picture tube. For continued

X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as

specified in the parts list.

SAFETY PRECAUTION

Potentials of high voltage are present when this receiver is operating. Operation of the receiver

outside the cabinet or with the back board removed involves a shock hazard from the receiver.

Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions

necessary when working on high voltage equipment.

Discharge the high potential of the picture tube before handling the tube. The picture tube is

highly evacuated and if broken, glass fragments will be violently expelled.

If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement

Parts List.

When replacing a high wattage resistor (metal oxide film resistor) in the circuit board, keep the

resistor 10 mm away from circuit board.

Keep wires away from high voltage or high temperature components.

This receiver must operate under AC 230 volts, 50Hz. NEVER connect to a DC supply or any

other voltage or frequency.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this equipment have special safety-related

characteristics. These characteristics are often passed unnoticed by a visual inspection and the

X-RAY RADIATION protection afforded by them cannot necessarily be obtained by using

replacement components rated for higher voltage, wattage, etc. Replacement parts which have

these special safety characteristics are identified in this manual and its supplements, electrical

components having such features are identified by designated symbol on the parts list. Before

replacing any of these components, read the parts list in this manual carefully. The use of

substitutes replacement parts which do not have the same safety characteristics as specified in

the parts list may create X-RAY Radiation.

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