Daewoo DTQ-29U1SCV User 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 : TCN400FNF0
JUNE. 2005
CHSSIS MODEL
CN-400FN DTQ-29U1SCV
DTQ-29U1SSFV
DTQ-29U1SCSV
DTQ-29U5SSFV
CN-401FN DTQ-29U4SCV

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SAFETY PRECAUTIONS 2
SPECIFICATIONS 5
CIRCUIT BLOCK DIAGRAM 6
ALIGNMENT INSTRUCTIONS 7
YOUR REMOTE CONTROL 7
SERVICE MODE ADJUSTMENT 8
ASSEMBLY ADJUSTMENT 10
IC DESCRIPTION 14
UOC III SERIES 14
TDA8358J VERTICAL AMPLIFIER 19
TDA6107AJF 21
24WC16-16 KB EEPROM 22
LA42072N-E AUDIO AMPLIFIER 23
STR-W6735/56 24
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])

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CIRCUIT BLOCK DIAGRAM

-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 LEXIT
- 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)

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ALIGNMENT INSTRUCTION
Table-B. CN-400FN(DTQ-29U1SCV) EEPROM DATA
MODE NAME VAL
REMARKS
MODE NAME VAL
REMARKS
S1 HEAT RUN RUN OFF SOC 0
OEC : 650V PWLDAC 0
RCA : 850V CL 10
S5 AGC LEVEL 22 CLD 0
IFOFF 37 GAM 1
QSS 1 HCT 0
BPB 1 ACL 0
FMI 1 BPS 1
AGN 0 CHSE 2
BPBS 1 FCO 0
DSG RF:0, AV:1 CBPS 1
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 43 B-GAIN 40
V.CENTER 42 R-BIAS 32
V.SLOPE 28 G-BIAS 32
V.LINEARITY 37 SRC R-BIAS 32
S_CORRECTION 32 SRC G-BIAS 32
H.CENTER 45 CVI R-BIAS -8
H.SIZE 54 CVI G-BIAS 10
H.PARALLEL 33 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
S7-2
SCREEN ADJUSTS2
S9
S8
S6
S7-1

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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
S_CORRECT
32 CORNER TOP 54
H.CENTER 45 CORNER BOTTOM 46
H.SIZE 54
SELECT ADJUST EXIT

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ALIGNMENT INSTRUCTION
4-1). 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.
4-2). Vertical Position Adjustment
Select V.SLOPE item, adjust V.SLOPE data value to equalize half the screen with
center of the picture.
Select V.CENTER item, adjust V.CENTER data value to center the raster properly
on the screen.
4-3). Vertical Size Adjustment
Select V.SIZE item, adjust V.SIZE data value to proper vertical size as follows.
Select V.LINEARITYitem, adjust V.LINEARITYdata value to proper vertical linearty.

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ALIGNMENT INSTRUCTION
4-4). EAST / WEST Adjustment
Adjust the H.PARALLEL, H.SIZE, H-BOW, PARABOLA, EW TRAPEZ, CORNER TOP,
CORNER BOTTOM to compensate for geometrical distortion.
H.PARALLEL H.SIZE
PARABOLA CORNER TOP, CORNER BOTTOM
EW TRAPEZ

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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.
DP-Bri
g
htnes
s
10
DP-Contrast 10
DP-Color 5
DP-Shar
p
nes
s
18
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
SELECT ADJUST EXIT

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IC DESCRIPTION
1-1. UOC III BLOCK DIAGRAM
1. UOC III RERIES

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IC DESCRIPTION
2.

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IC DESCRIPTION

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IC DESCRIPTION
3.

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IC DESCRIPTION
4.

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IC DESCRIPTION
5. LA42072N-E AUDIO AMPLIFIER5. LA42072N-E AUDIO AMPLIFIER
LA42000 series is power IC which made Pin compatible possible a ltogether in 5 to 15W.
They consist of four kinds of power ICs.
(mono, stereo, mono with volume function , stereo with volume function.£'
They realized PCB layout communalization of an audio power block of TV.
Block Diagram
Operating Characteristics at Ta = 25¡,VCC = 12V,RL = 8¥,f = 1kH z,Rg = 600¥
min typ max
Quiescent current ICCO Rg=0 40 70 150 mA
Output power Po THD=10% 67-W
Total harmonic distortion THD Po=1W -0.06 0.2 %
Voltage gain VG Vo=0dBm 33 35 37 dB
Output noise voltage VNO Rg=0,BPF=20Hz to 20kHz -0.1 0.3 mVrms
Ripple rejection SVRR Rg=0,fR=100Hz,VCCR=0dBm 50 60 -dB
Channel separation Sep. Rg=10k¥, Vo=0dBm 50 60 -dB
Muting attenuation ATT Vo=1Vrms
,
BPF=20Hz to 20k
H
80 90 -dB
VMUTE - H Muting on 1.7 -3.0 V
VMUTE - L Muting off 0-0.5 V
VSTB - H Amplifier on 2.5 -20 V
VSTB - L Amplifier off 0-0.5 V
Input resistance Ri 21 30 39 k¥
Unit
Muting control voltage
£¤The Pin 6 voltage£'
Standby control voltage
(The Pin 5 voltage£'
ConditionsSymbolParameter Ratings

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IC DESCRIPTION
6. STR-W6735
FUNCTIONS OF EACH TERMINAL
TERMINAL
No. SYMBOLS DESCRIPTIONS FUNCTIONS
1 D DRAIN TERMINAL MOSFET DRAIN
3 S/GND SOURCE/GND MOSFET SOURCE / GND
4 Vcc SET UP TERMINAL INPUT OF POWER SUPPLY
FOR CONTROL CIRCUIT
5 SS/OLP DELAY AT OVERLOAD / SOFT START SET UP
TERMINAL
OVERLOAD PROTECTION
AND SOFT START
OPERATION TIME SET UP
6 FB FEEDBACK TERMINAL
CONSTANT VOLTAGE
CONTROL SIGNAL INPUT,
BURST(INTERMITTENT)
MODE OSCILLATION
7 OCP/BD
OVERCURRENT
PROTECTION INPUT /
BOTTOM DETECTION
TERMINAL
OVERCURRENT DETECTION
SIGNAL INPUT / BOTTOM
DECTION SIGNAL INPUT
BLOCK DIAGRAM

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IC DESCRIPTION
ELECTRICAL CHARACTERISTICS IN CONTROL PART
(Ta=25¡, Vcc=20V, UNLESS OTHERWISE SPECIFIED)
MIN TYP MAX
OPERATION START VOLTAGE 4-3 Vcc(on) 16.3 18.2 19.9 V
OPERATION STOP VOLTAGE 4-3 Vcc(off) 8.8 9.7 10.6 V
CIRCUIT CURRENT IN OPERATION 4-3 Icc(on) 6 mA
CIRCUIT CURRENT IN NON-OPERATION 4-3 Icc(off) 100 uH
OSCILLATION FREQUENCY 1-3 fosc 19 22 25 kHz
SOFT START OPERATION STOP VOLTAGE 5-3 Vssolp(ss) 1.1 1.2 1.4 v
SOFT START OPERATION CHARGING
CURRENT 5-3 Issolp(ss) -710 -550 -390 uA
BOTTOM-SKIP OPERATION THRESHOLD
VOLTAGE1 7-3 Vocpbd(bs1 )-0.72 - 0.660 -0.61 V
BOTTOM-SKIP OPERATION THRESHOLD
VOLTAGE2 7-3 Vocpbd(bs2 )- 0.485 - 0.435 - 0.385 V
OVERCURRENT DETECTION THRESHOLD
VOLTAGE 7-3 Vocpbd(lim) - 0.995 - 0.940 - 0.895 V
OCP/BD TERMINAL OUTFLOW CURRENT 7-3 Iocpbd -250 -100 -40 uA
QUASI-RESONANT OPERATION
THRESHOLD VOLTAGE1 7-3 Vocpbd(th1) 0.28 0.40 0.52 V
QUASI-RESONANT OPERATION
THRESHOLD VOLTAGE2 7-3 Vocpbd(th2) 0.67 0.80 0.93 V
FB TERMINAL THRESHOLD VOLTAGE 6-3 Vfb(off) 1.32 1.45 1.58 V
FB TERMINAL INFLOW CURRENT(NORMAL
OPERATION) 6-3 Ifb(on) 600 1000 1400 uA
STAND-BY OPERATION START VOLTAGE 4-3 Vcc(s) 10.3 11.2 12.1 V
STAND-BY OPERATION START VOLTAGE
INTERVA
L
4-3 Vcc(sk) 1.20 1.45 1.65 V
STAND-BY NON-OPERATION CIRCUIT
CURRENT 4-3 Icc(s) 20 56 uA
FB TERMINAL INFLOW CURRENT(STAND-
BY) 1-3 Ifb(s) 4 14 uA
STAND-BY OPERATION FB TERMINAL
THRESHOLD VOLTAGE 6-3 Vfb(s) 0.55 1.10 1.50 V
MINIMUM ON TIME 1-3 Ton(min) 0.75 1.20 uSec
MAXIMUM ON TIME 1-3 Ton(max) 27.5 32.5 39.0 uSec
OLP OPERATION THRESHOLD VOLTAGE 5-3 Vssolp(olp) 4.0 4.8 5.8 V
OLP OPERATION CHARGING CURRENT 5-3 Issolp(olp) -16 -11 -6 uA
OLP OPERATION VOLTAGE 4-3 Vcc(ovp) 25.5 27.7 29.9 V
LATCH CIRCUIT HOLDING CURRENT 4-3 Icc(h) 45 140 uA
LATCH CIRCUIT RELEASE VOLTAGE 4-3 Vcc(la.off) 6.0 7.2 8.5 V
NORMAL OPERATION
POWER SUPPLY START-UP OPERATION
STAND-BY OPERATION
PROTECTION OPERATION
TERMINALPARAMETER RATINGS UNITESSYMBOL

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IC DESCRIPTION
69 70 81 80 79 78 77 76 75 74 73 72 71 88 87 86 85 84 83 82 65 66 68 67 89 90
25 26 27 28 29 30 31 32 33 34 35 36 37 38 40 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
39 1 2 3 4 21 23 24 22 41 42 43 44 45
HERCULES FULL-STEREO (SSDIP90)
60 64 63 62 61 56 57 59 58 55 54
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.) BO GO RO
BLKIN BCLIN VP3 GND3 INSSW3 R/P
R
-3
B/P
B
-3
G/Y-3
CVBSX
YOUT
YSYNC VDDcomb VSScomb
FBISO/CSY SVM HOUT
52 53
48 49 51 50 47 46
(standard version)
AUDIOIN3R//P1.5/P2.5
P1.3/T1
SSIF/REFIN/REFOUT
P0.5/INT0//P1.2
UOC III SERIES

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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

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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 Broadcast output / 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