DAEWOO DTQ-20S1SSFV, DTQ-2130SSFV, DTQ-21D7SSPV, DTQ-21U6SSFV, DTQ-21U6SSV Service Manual

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

S/M No : TCN402FEF0

MAR. 2006

CHSSIS MODEL

CN-402FN DTQ-20S1SSFV

DTQ-2130SSFV DTQ-21D7SSPV DTQ-21U6SSFV DTQ-21U6SSV

-1-

CIRCUIT BLOCK DIAGRAM

IC DESCRIPTION 14

UOC III SERIES 14 TDA8358J VERTICAL AMPLIFIER 26 TDA6107AJF 28 24WC16-16 KB EEPROM 29 LA42072N-E AUDIO AMPLIFIER 30

STR-W6735/56 31 WAVEFORMS 33 TROUBLE SHOOTING GUIDE 35

NO POWER 35

NO PICTURE 36

NO SOUND 37

CH DON’T MEMORY or SKIP 38

NO COLOR 39

NO VERTICAL DEFLECTION 39

REMOTE CONTROL DOESNOT OPERATE 40 ELECTRICAL PARTS LIST 41 DIFFERENT PARTS LIST 53 PRINTED CIRCUIT BOARD 56 SCHEMATIC DIAGRAM 59 EXPLODE VIEW 61

TABLE OF CONTENTS

APPENDIX(Appendix is provide only by internet[http://svc.dwe.co.kr])

-6-

CIRCUIT BLOCK DIAGRAM

CN-402FN 21" MODEL for US(With Component Input)

3W 8 ohm

21"

+122V

+195V

+47V

+14V

+47V

+44V

195V

+122V

+44V

7.7V/5V

-8-

ALIGNMENT INSTRUCTION

1. SERVICE MODE ADJUSTMENTS Follow the steps below whenever service adjustment is required. See Table- A and Table- B to determine if service adjustments are required.

1) How to enter the service mode using the user remote control.

- Turn the set on.

- Direct the remote control to the reception window of TV.

- Push buttons of remote control in sequence as follows.

1 →→MUTE →→DISPLAY →→MUTE

- Then, the screen will appear as follows.

SERVICE 02 SERVICE 03 SERVICE 04 SERVICE 05 SERVICE 06 SERVICE 07 SERVICE 08 SERVICE 09 SERVICE 10 SERVICE 11 SERVICE 12

VWSELECT CBADJUST L EXIT

- Using the channel up or channel down button, select the item you wish to adjust. (The color of selected item turns into the blue.)

Press the volume up or down button to enter in the service mode you wish to adjust.

2) How to memorize the adjusted values in the service mode.

- Don’t have to press any button the state which the screen is displaying each of service menus after all adjustments are completed each of all service menu.

Table-A : Adjust the values of service mode when a part is replaced.

PART ADJUSTMENT

NOTES

REPLACED NECESSARY UNNECESSARY

I701 O Data is stored in I702.

(U-COM)

Initial setting values are written from I701.

I702 ADJUSTING ITEMS

(EEPROM) O S6 : Geometry adjustmrnt

S8 : White balance S9 : Subbrightness

Adjust items related to picture tube only.

CRT O (White Balance adjustment)

CRT OPTION (Screen Option adjustment)

-9-

ALIGNMENT INSTRUCTION

MODE NAME VAL REMARKS MODE NAME VAL REMARKS

S1 HEAT RUN RUN OFF SOC 0

PWLDAC 0

CL 4

S5 AGC LEVEL 22 CLD 0

IFOFF 37 GAM 1

QSS 1 HCT 0 BPB 1 ACL 0

FMI 1 BPS 0

AGN 0 CHSE 2

BPBS 1 FCO 0

DSG RF:0, AV:1 CBPS 0

Fine Tunning CB 0

FILTBW 0 MUS 0

IDMOD 1 FFI 0

OVMTHR 1 R-GAIN 32

IDMOD SLOW KOR 1 G-GAIN 32

V.SIZE 31 B-GAIN 40

V.CENTER 36 R-BIAS 32

V.SLOPE 33 G-BIAS 32

V.LINEARITY 35 SRC R-BIAS 32

S_CORRECTION 20 SRC G-BIAS 32

H.CENTER 45 CVI R-BIAS 0

H.SIZE 54 CVI G-BIAS 0

H.PARALLEL 44 DP-Brightness 10

H-BOW 35 DP-Contrast 10

PARABOLA 17 DP-Color 5

EW TRAPEZ 38 DP-Sharpness 18

CORNER TOP 54 S10 OPTION

CORNER BOTTOM 46 S12 FACTORY SET

CFCLF 1

YD TV RF:4, AV:7

DTR 0

BPYD 0

TCCON 1

TCI2X 0

PF 3

TFR 1

NRR 0

WS 3 BLS 0 DSK 0 AAS 2 BSD 0 BKS 1 DSA 0 RPO 3 RPA 2 BPD 0

CFA0 1

S7-1

S7-2

DTQ-20S1SSFV EEPROM DATA (050407)

CN-402FN

SCREEN ADJUSTS2 580V

* VOLUME : CENTER (32)

* OPTION 1 : 1110 1001 OPTION 2 : 0110 0011 OPTION 3 : 0000 0010

* SCREEN : 6AE ---> 18 (HEX)

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ALIGNMENT INSTRUCTION

2. ASSEMBLY ADJUSTMENTS

1) SCREEN ADJUSTMENT (S2) Enter the service mode and select service adjustment S2.

You can see the one horizontal line on the screen. Adjust the Screen Control Volume (located on FBT) so that the horizontal line

onscreen may be disappeared.

Press S2 button to exit in the screen adjustment mode.

2) FOCUS ADJUSTMENT Turn in a local station and adjust the Focus Control knob (located on FBT) for best

picture details at high light condition.

3) AGC ADJUSTMENT Adjust the antenna signal level at 60 dBuV

Tune a colour bar pattern. Find the

"AGC"

item in service mode.

(it's two way to entering the

"AGC"

item in service mode)

- Enter the service mode and select service adjustment S5 and select AUTO-AGC.

- Enter the service mode and select service adjustment S3.

Wait until AGC level stabilise to the optimum value. Alternatively,

Enter the service mode and select service adjustment S5 and select AGC LEVEL.

Use "Vol Up/Dwn" keys to adjust manually to the desired Tuner Take Over Point.

4) GEOMETRIC ADJUSTMENTS (S6) Select service adjustment S6

You can see the OSD as shown in below.

V.SIZE 43 H.PARALLEL 33 V.CENTER 42 H-BOW 35 V.SLOPE 28 PARABOLA 17 V.LINEARITY 37 EW TRAPEZ 38

32 CORNER TOP 54 H.CENTER 45 CORNER BOTTOM 46 H.SIZE 54

SELECT ADJUST EXIT

S_CORRECT

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ALIGNMENT INSTRUCTION

4-1) Vertical Position Adjustment.

- Select V.SLOPE item, adjust V.SLOPE data value till the horizontal line in the centre of the video signal is just at the position where the blanking stars.

- Select V.CENTER item, adjust V.CENTER data value to center the raster properly on the screen.

4-2) Vertical Size Adjustment

- Select V.SIZE item, adjust V.SIZE data value to proper vertical size as follows.

4-3) Horizontal Position Adjustment

- Select H.CENTER item, adjust H.CENTER data value to obtain proper horizontal centering of the internal cross pattern at the left and right of the screen.

-12-

ALIGNMENT INSTRUCTION

H.PARALLEL

4-4). H.BOW, PARABOLA Adjustment * Adjust the H.BOW, PARABOLA to compensate for geometrical distortion. * You can not adjust the H.PARALLEL, H.SIZE, EW TRAPEZ, CORNER TOP and CORNER BOTTOM.

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ALIGNMENT INSTRUCTION

5) WHITE BALANCE ADJUSTMENT(S8) Receive a good local channel.

Enter the service mode and select service adjustment S8. You can see the OSD as shown in below.

R-GAIN 32 SRC R-BIAS 32

G-GAIN 32 SRC G-BIAS 32

B-GAIN 40 CVI R-BIAS -8 R-BIAS 32 CVI G-BIAS 10 G-BIAS 32

Using volume up or volume down, adjust service adjustment data of R-GAIN/G-GAIN/B-GAIN and

R-BIAS/G-BIAS until a good gray scale with normal whites is obtained.ALIGNMENT INSTRUCTIONS

6) DIGITAL PRESET(D.P) ADJUSTMENTS(S9)

SUBBRIGHTNESS ADJUSTMENT

Receive a good local channel. Enter the service mode and select service adjustment S9. You can see the OSD as shown in below.

10 DP-Contrast 10 DP-Color 5

Select DP-Brightness item, adjust DP-Brightness data value to obtain normal

brightness level.

DP-Contrast

Fixed value = 10

DP-Color

Fixed value = 5

DP-Sharpness

Fixed value = 18

7) FACTORY OUTGOING MODE (S12 : FACT) If you select the S12, then the set becomes factory outgoing status.

You can see the OSD

"SHIPPING OFF"

SELECT ADJUST EXIT

DP-Brightnes

DP-Sharpnes

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IC DESCRIPTION

1-1. UOC III BLOCK DIAGRAM

1. UOC III SERIES

-19-

IC DESCRIPTION

8180797877767574737271

88878685848382

666867

25262728293031323334353637

5678910111213141516171819

123

232422

4142434445

HERCULES FULL-STEREO (SSDIP90)

646362

575958

CVBS3/Y3

AUDIOIN3L//P1.4/P2.4

CVBSO/PIP

AUDOUTLSL

AUDOUTLSR

AUDOUTHPL

AUDOUTHPR

VREFAD

GNDA1

VDDA(1.8V)

GNDA2

VDDA3(3.3V)

P1.0/INT1

P1.1/T0

P3.0/ADC0

P2.1/PWM0//P0.1

P2.0/TPMW//P0.4

P1.7/SDA

P1.6/SCL1

VDDP(3.3)

XTALOUT

XTALIN

P3.3/ADC3

P3.1/ADC1

VDDA1(3.3V)

VSSA1

P3.2/ADC2

VDRA

VIFIN1

VIFIN2

VSC

SECPLL

DECDIG

PH1LF

DECBG

AVL/EWD

VDRB

IREF

AGCOUT

DVBIN1/SIFIN1

DVBIN2/SIFIN2

VP1

GNDIF

EHTO

VGUARD/SWIO

GND1

PH2LF

AUDIOIN5L

GND2

DVBO//IFVO/FMRO

AGC2SIF/SWO/AVL/

AUDIOIN4L//P2.2

SIFAGC/DVBAGC

PLLIF

VCC8V

AUDIOIN4R//P2.3

AUDIOIN2L//P0.2

AUDIOIN2R//P0.0

CVBS4

C2/3

CVBS2/Y2

VP2

SVO/IFOUT/CVBSI

AUDOUTSL

AUDOUTSR

VDDC(1.8)/RESET

VSSC

VDDA2(3.3V.)BOGO

BLKIN

BCLIN

VP3

GND3

INSSW3

R/P

-3

B/P

-3 G/Y-3

CVBSX

YOUT

YSYNC

VDDcomb

VSScomb

FBISO/CSY

SVM

HOUT

495150

(standard version)

AUDIOIN3R//P1.5/P2.5

P1.3/T1

SSIF/REFIN/REFOUT

P0.5/INT0//P1.2

-20-

IC DESCRIPTION

SYMBOL

STANDARD

VERSION

FACE DOWN

VERSION

DESCRIPTION

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

VSSP2 1 1 128 90 ground VSSC4 2 1 127 90 ground VDDC4 3 3 126 88 digital supply to SDACs (1.8V) VDDA3(3.3V) 4 16 125 75 supply (3.3 V) VREF_POS_LSL 5 16 124 75 positive reference voltage SDAC (3.3 V) VREF_NEG_LSL+HPL 6 17 123 74 negative reference voltage SDAC (0 V) VREF_POS_LSR+HPR 7 16 122 75 positive reference voltage SDAC (3.3 V) VREF_NEG_HPL+HPR 8 17 121 74 negative reference voltage SDAC (0 V) VREF_POS_HPR 9 16 120 75 positive reference voltage SDAC (3.3 V) XTALIN 10 18 119 73 crystal oscillator input XTALOUT 11 19 118 72 crystal oscillator output VSSA1 12 20 117 71 ground VGUARD/SWIO 13 69 116 22 V-guard input / I/O switch (e.g. 4 mA current

sinking capability for direct drive of LEDs) DECDIG 14 21 115 70 decoupling digital supply VP1 15 22 114 69 1st supply voltage TV-processor (+5 V) PH2LF 16 23 113 68 phase-2 lter PH1LF 17 24 112 67 phase-1 lter GND1 18 25 111 66 ground 1 for TV-processor SECPLL 19 26 110 65 SECAM PLL decoupling DECBG 20 27 109 64 bandgap decoupling EWD/AVL

(1)

21 66 108 25 East-West drive output or AVL capacitor VDRB 22 68 107 23 vertical drive B output VDRA 23 67 106 24 vertical drive A output VIFIN1 24 28 105 63 IF input 1

-21-

IC DESCRIPTION

VIFIN2 25 29 104 62 IF input 2 VSC 26 30 103 61 vertical sawtooth capacitor IREF 27 31 102 60 reference current input GNDIF 28 32 101 59 ground connection for IF ampli er SIFIN1/DVBIN1

(2)

29 33 100 58 SIF input 1 / DVB input 1 SIFIN2/DVBIN2

(2)

30 34 99 57 SIF input 2 / DVB input 2 AGCOUT 31 35 98 56 tuner AGC output EHTO 32 65 97 26 EHT/overvoltage protection input AVL/SWO/SSIF/

REFO/REFIN

(2)

33 44 96 47 Automatic Volume Levelling / switch output /

sound IF input / subcarrier reference output / external reference signal input for I signal mixer

for DVB operation AUDIOIN5 - - - - audio 5 input AUDIOIN5L 34 36/- 95 55/- audio-5 input (left signal) AUDIOIN5R 35 - 94 - audio-5 input (right signal) AUDOUTSL 36 37 93 54 audio output for SCART/CINCH (left signal) AUDOUTSR 37 38 92 53 audio output for SCART/CINCH (right signal) DECSDEM 38 -/72 91 -/19 decoupling sound demodulator QSSO/AMOUT/AUDEEM

(2)

39 -/36 90 -/55 QSS intercarrier output / AM output /

deemphasis (front-end audio out) GND2 40 39 89 52 ground 2 for TV processor PLLIF 41 40 88 51 IF-PLL loop lter SIFAGC/DVBAGC

(2)

42 41 87 50 AGC sound IF / internal-external AGC for DVB

applications DVBO/IFVO/FMRO

(2)

43 42 86 49 Digital Video Broadcastoutput / IF video output /

FM radio output DVBO/FMRO

(2)

44 - 85 - Digital Video Broadcast output / FM radio output

VCC8V 45 43 84 48 8 Volt supply for audio switches

SYMBOL

STANDARD

VERSION

FACE DOWN

VERSION

DESCRIPTION

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

-22-

IC DESCRIPTION

AGC2SIF 46 44/- 83 47/- AGC capacitor second sound IF VP2 47 45 82 46 2

supply voltage TV processor (+5 V)

IFVO/SVO/CVBSI

(2)

48 46 81 45 IF video output / selected CVBS output / CVBS

input AUDIOIN4 - - - - audio 4 input AUDIOIN4L 49 47 80 44 audio-4 input (left signal) AUDIOIN4R 50 48 79 43 audio-4 input (right signal) CVBS4/Y4 51 49 78 42 CVBS4/Y4 input C4 52 - 77 - chroma-4 input AUDIOIN2 - - - - audio 2 input AUDIOIN2L 53 50 76 41 audio 2 input (left signal) AUDIOIN2R 54 51 75 40 audio 2 input (right signal) CVBS2/Y2 55 52 74 39 CVBS2/Y2 input AUDIOIN3 - - - - audio 3 input AUDIOIN3L 56 53 73 38 audio 3 input (left signal) AUDIOIN3R 57 54 72 37 audio 3 input (right signal) CVBS3/Y3 58 55 71 36 CVBS3/Y3 input C2/C3 59 56 70 35 chroma-2/3 input AUDOUTLSL 60 57 69 34 audio output for audio power ampli er (left

signal) AUDOUTLSR 61 58 68 33 audio output for audio power ampli er (r ight

signal) AUDOUT/AMOUT/FMOUT - - - - audio output / AM output / FM output, volume

controlled AUDOUTHPL 62 59 67 32 audio output for headphone channel (left signal) AUDOUTHPR 63 60 66 31 audio output for headphone channel (right

signal) CVBSO/PIP 64 61 65 30 CVBS / PIP output

SYMBOL

STANDARD

VERSION

FACE DOWN

VERSION

DESCRIPTION

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

-23-

IC DESCRIPTION

SVM 65 62 64 29 scan velocity modulation output FBISO/CSY 66 63 63 28 ybac k input/sandcastleoutput or composite H/V

timing output HOUT 67 64 62 27 horizontal output VSScomb 68 70 61 21 ground connection for comb lter VDDcomb 69 71 60 20 supply voltage for comb lter (5 V) VIN (R/P

IN2/CX) 70 - 59 - V-input for YUV interface (2nd R input / PR input

or CX input) UIN (B/PBIN2) 71 - 58 - U-input for YUV interface (2

B input / PB input)

YIN (G/YIN2/CVBS-Y

) 72 72/- 57 19/- Y-input for YUV interface (2nd G input / Y input

or CVBS/YX input)) YSYNC 73 73 56 18 Y-input for sync separator YOUT 74 74 55 17 Y-output (for YUV interface) UOUT (INSSW2) 75 - 54 - U-output for YUV interface (2

RGB / YPBP

insertion input) VOUT (SWO1) 76 - 53 - V-output for YUV interface (general purpose

switch output) INSSW3 77 75 52 16 3rd RGB / YPBPRinsertion input R/P

IN3 78 76 51 15 3rd R input / PR input

G/YIN3 79 77 50 14 3

G input / Y input

B/P

IN3 80 78 49 13 3rd B input / PB input GND3 81 79 48 12 ground 3 for TV-processor VP3 82 80 47 11 3rd supply for TV processor BCLIN 83 81 46 10 beam current limiter input BLKIN 84 82 45 9 black current input RO 85 83 44 8 Red output GO 86 84 43 7 Green output BO 87 85 42 6 Blue output

SYMBOL

STANDARD

VERSION

FACE DOWN

VERSION

DESCRIPTION

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

STEREO +

AV STEREO QFP128

FULL-STEREO/

MONO+ AV STEREO SSDIP90

MONO

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