Daewoo DTH-29U3 User manual

OTC 2003
CHASSIS : CP-830F
MODEL : DTH-29U3
S/M No.TCN830FEF0

CP830F Service Manual
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CONTENTS
DOCUMENT HISTORY 5
1 MAIN FEATURES 5
1.1SPECIFICATIONS 5
1.1.1 GENERAL 5
1.1.2 EURO-SCART 1 (21 Pin) 5
1.1.3 EURO-SCART 2 (21 Pin) 6
1.2CHANNEL/FREQUENCY TABLE 7
1.3ATSS SORTING METHOD 10
1.3.1 GENERAL CASE 10
1.3.2 SPECIAL CASE 10
2 SAFETY INSTRUCTION 12
3 ALIGNMENT INSTRUCTIONS 13
3.1MICROCONTROLLER CONFIGURATION : SERVICE MODE 13
3.2SERVICE MODE NAVIGATION 13
3.3MICROCONTROLLER CONFIGURATION : OPTION BITS 13
3.3.1 OPTION 1 14
3.3.2 OPTION 2 14
3.4 TV SET ALIGNMENT 14
3.4.1 LOCAL OSCILLATOR ALIGNMENT 14
3.4.2 G2 ALIGNMENT 14
3.4.3 WHITE BALANCE 15
3.4.4 FOCUS 15
3.4.5 VERTICAL GEOMETRY 15
3.4.6 HORIZONTAL PICTURE CENTRING 15
3.4.7 EAST / WEST CORRECTION 15
3.4.8 AGC 16
4 IC DESCRIPTION 17
4.1TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER 17
4.1.1 BLOCK DIAGRAM OF THE SDA55XX 17
4.1.2 DESCRIPTION 17
4.1.3 IC MARKING AND VERSION 18
4.1.4 PINNING 18
4.2 VSP9412A - SCAN RATE CONVERTER INCLUDING MULTISTANDARD COLOUR
DECODER 19
4.2.1 BLOCK DIAGRAM OF THE VSP9412A 20
4.2.2 DESCRIPTION 20
4.2.3 PINNING 22
4.3DDP 3315C - DISPLAY AND DEFLECTION PROCESSOR 23
4.3.1 BLOCK DIAGRAM OF THE DDP 3315C 24
4.3.2 DESCRIPTION 24
4.3.3 PINNING 26
4.4MSP341X MULTISTANDARD SOUND PROCESSOR 28
4.4.1 BASIC FEATURES OF THE MSP 341X 28
4.4.1.1 Demodulator & NICAM Decoder Section 28
4.4.1.2 DSP-Section (Audio Baseband Processing) 29

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4.4.1.3 Analogue Section 29
4.4.1.4 NICAM & FM/AM-Mono 29
4.4.1.5 German 2-Carrier System (DUAL FM System) 29
4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR 32
4.5.1 DESCRIPTION 32
4.5.2 FEATURES 32
4.5.3 PINNING 32
4.5.4 BLOCK DIAGRAM 33
4.6TDA894XJ STEREO AUDIO AMPLIFIER 34
4.6.1 FEATURES 34
4.7TDA835XJ VERTICAL AMPLIFIER 35
4.7.1 TDA8357J 35
4.7.2 TDA8358J 37
4.8TDA6107Q 39
4.924C16 - 16 KB EEPROM 40
4.10 STR - F6654 41
4.10.1 GENERAL DESCRIPTION 41
4.10.2 FEATURES 41
4.10.3 BLOCK DIAGRAM 41
4.10.4 PIN DESCRIPTION 42
4.10.5 CONTROL PART - ELECTRICAL CHARACTERISTICS 42
4.10.6 MOSFET ELECTRICAL CHARACTERISTICS 43
5 CP830 CHASSIS DESCRIPTION 44
5.1BLOCK DIAGRAM 44
5.2IF SECTION 45
5.2.1 BLOCK DIAGRAM 45
5.2.2 VISION IF AMPLIFIER 46
5.2.3 TUNER-AND VIF-AGC 46
5.2.4 FPLL, VCO AND AFC 46
5.2.5 VIDEO DEMODULATION AND AMPLIFIER 47
5.2.6 SOUND IF AMPLIFIER AND SIF-AGC 47
5.2.7 QUASI-PARALLEL-SOUND (QPS) MIXER 47
5.2.8 STANDARD SWITCH 47
5.2.9 L SWITCH 47
5.2.10 INTERNAL VOLTAGE STABILISER 47
5.3VIDEO / RGB 51
5.3.1 FRONT END 47
5.3.1.1 CVBS Front-End 47
5.3.1.2 Input Selector 48
5.3.1.3 Signal Levels And Gain Control 48
5.3.1.4 Synchronization 48
5.3.1.5 Chroma Decoder 48
5.3.1.6 Luminance Processing 48
5.3.1.7 RGB Front-End 48
5.3.1.8 Signal Processing 48
5.3.1.8.1 Horizontal Prescaler 48
5.3.1.8.2 Noise Reduction 49
5.3.1.8.3 Noise Measurement 49
5.3.1.8.4 Operation Modes 49

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5.3.1.8.5Digital 656 Output 49
5.3.2BACK END 49
5.3.2.1 Digital Input Interface 49
5.3.2.2 Horizontal Scaler 49
5.3.2.3 Luma Contrast and Brightness 49
5.3.2.4 Black Level Expander/Compressor (BLEC) 49
5.3.2.5 Luma Sharpness Enhancer (LSE) 50
5.3.2.6 Dynamic Peaking 50
5.3.2.7 Luma Transient Improvement (LTI) 50
5.3.2.8 Mixing of Dynamic Peaking and LTI 50
5.3.2.9 Chroma Transient Improvement 50
5.3.2.10 Analog Back End 51
5.3.2.11 Analog RGB Insertion 51
5.3.2.12 CRT Measurement and Control 51
5.3.2.13 Synchronization and Deflection 52
5.3.2.14 EHT Compensation 52
5.4MICROCONTROLLER 52
5.4.1MICROCONTROLLER FEATURES 52
5.4.2ACQUISITION FEATURES 53
5.4.3PORTS 53
5.4.4 -CONTROLLER I/O PIN CONFIGURATION AND FUNCTION TABLE 53
5.4.5TUNING 54
5.4.6AUTOMATIC PICTURE FORMAT SWITCHING 54
5.4.6.1 WSS Data 54
5.4.6.2 SCART Pin 8 Data (Slow Switching) 55
5.4.6.3 Picture Format Description 55
5.4.6.3.1 16:9 CRT 55
5.4.6.3.2 4:3 CRT 56
5.4.7EXTERNAL SOURCE CONTROL LOGIC 57
5.4.8OVER CURRENT PROTECTION 58
5.5TELETEXT DISPLAY 58
5.6SOUND PROCESSING 59
5.6.1ANALOGUE SOUND IF - INPUT SECTION 59
5.6.2QUADRATURE MIXERS 59
5.6.3PHASE AND AM DISCRIMINATION 59
5.6.4NICAM DECODER 60
5.6.5DSP SECTION 60
5.6.6SOUND MODE SWITCHING 60
5.7SOUND AMPLIFICATION 60
5.7.1POWER AMPLIFIER 60
5.7.2MODE SELECTION 60
5.8VERTICAL DEFLECTION 61
5.8.1FLYBACK VOLTAGE 61
5.8.2PROTECTION 61
5.8.3GUARD CIRCUIT 61
5.8.4DAMPING RESISTOR 61
5.8.5EAST-WEST AMPLIFIER (TDA8358J ONLY) 61
5.9POWER SUPPLY (STR F6654) 61
5.9.1STR-F6654 GENERAL DESCRIPTION 61

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5.9.2POWER SUPPLY PRIMARY PART OPERATIONS 61
5.9.2.1 Start -up Circuit: VIN 62
5.9.2.2 STR-F6654 Oscillating Operation 63
5.9.2.3 STR-F6654 Protection Circuits 64
5.10 TV START-UP, TV NORMAL RUN AND STAND BY MODE OPERATIONS 65
5.10.1 TV START-UP OPERATIONS 65
5.10.1.1 Schematic Diagram For Start-Up Operations 65
5.10.1.2 TV Start-Up And Microcontroller Initialisation 65
5.10.2 TV NORMAL RUN AND STAND-BY MODE OPERATIONS 67
5.10.2.1 TV On Normal Run Mode 67
5.10.2.2 TV Set On Stand-By Mode 70
6 SERVICE PARTS LIST 72
6.1 DTH-29U7ZL 72
7 EXPLODED VIEW 88
7.1 DTH-29U7 88
8 PRINTED CIRCULT BOARD 93
8.1 MAIN PCB 93
8.2 CRT PCB 94
8.3 PFC PCB 95
9 SCHEMATIC DIAGRAM 96

CP830F Service Manual
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DOCUMENT HISTORY
VERSION DATE COMMENTS
V1.00 18/11/02 Creation of document (Author M Hearn) for project CP830 100Hz TV.
V1.01 22/11/02 Reformatting of the document, plus insertion of Document History section
1 MAIN FEATURES
1.1 SPECIFICATIONS
1.1.1 GENERAL
TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L
Colour system Tuner PAL, SECAM
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 29"(4:3) Real Flat :84W approx.
consumption
Sound Output Power 7W x 2 (at 60% mod, 10%THD)
Speaker 12W 8 ohm x2
Teletext system 9 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
29" : 68cm
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 R-46G22
Unit
1.1.2 EURO-SCART 1 (21 Pin)
Pin Signal Description Matching value
1 Audio Output Right 0.5 Vrms, Impedance < 1 k , ( RF 54% Mod )
2 Audio Input Right 0.5 Vrms, Impedance > 10 k
3 Audio Output Left 0.5 Vrms, Impedance < 1 k , ( RF 54% Mod )
4 Audio Earth
5 Blue Earth
6 Audio Input Left 0.5 Vrms, Impedance > 10 k
7 Blue Input 0.7 Vpp 0.1V, Impedance 75

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1.1.3 EURO-SCART 2 (21 Pin)
9 Green Earth
10 N.C.
11 Green Input 0.7 Vpp 0.1V, Impedance 75
12 N.C.
13 Red Earth
14 Blanking Earth
15 Red Input 0.7 Vpp 0.1V, Impedance 75
16 Fast Switching 0 to 0.4V : Logic 0, 1 to 3V : Logic 1, Impedance 75
17 Video Out Earth
18 Video In Earth
19 Video Output 1 Vpp 3dB, Impedance 75
20 Video Input 1 Vpp 3dB, Impedance 75
21 Common Earth
Pin Signal Description Matching value
1 Audio Output Right 0.5 Vrms, Impedance < 1 k ( RF 54% Mod )
2 Audio Input Right 0.5 Vrms, Impedance > 10 k
3 Audio Output Left 0.5 Vrms, Impedance < 1 k , ( RF 54% Mod )
4 Audio Earth
5 Earth
6 Audio Input Left 0.5 Vrms, Impedance > 10 k
7 N.C.
8 N.C.
9 N.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 75 ( Monitor output )
20 Video Input, Y In. 1 Vpp 3dB, Impedance 75
21 Common Earth
13579111315171921
2468101214161820

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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 503.25 503.25 503.25503.25
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

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CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT
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 751.25 751.25 751.25 751.25
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

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CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT
S17 273.25 296.75 287.25 273.25
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

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1.3 ATSS SORTING METHOD
The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each
program checks if a VPS CNI code is transmitted (this system exists for German, Swiss and Austrian transmissions).
If no VPS CNI code is found, then the system checks if a CNI code is transmitted as part of the teletext transmission
( Packet 8/30 format 1 and format 2). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the
program is automatically named.
If the transmission does not have VPS CNI, and no teletext service is available, then there is no possibility of the
program being automatically named.
The programs found are then sorted in 4 groups :
Group I : It contains all the programs from the selected country and named by the TV controlling software. Within this
group the sorting order is fixed by the ATSS list.
Group II : It contains all the programs with a strong signal strength which are not listed in group I.
Group III : It contains all the programs with a weak signal strength which are not listed in group I.
Group IV : If two or more programs with the same code are found, only the strongest ( or if they have the same level
the one with the lowest frequency) is listed in group I, II or III. The others are listed in group IV.
1.3.1 GENERAL CASE 1.3.2 SPECIAL CASE
Program Group Skip
number
1
2 Group I
...
n
n+1
... Group II
m
m+1
... Group III
p
p+1
... Group IV
q
q+1
... not used
99
0
Program Group Skip
number
1
... Group II
m
m+1
... Group III
p
p+1
... Group IV
q
q+1
... not used
99
0
Special case : Country selection = Others

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Note : If two programs with the same name but a different code are found these two programs
are listed in group I, II or III .
The sorting order within group II, III, and IV is based on the channel frequency. The program
with the lowest frequency is allocated the first rank in its group, and so forth until the last
program of the group which has the highest frequency.
Special case : France
If France is selected, the TV controlling software first sweeps all TV bands with France system
selected ( positive video modulation) and then a second time with Europe system selected (
negative video modulation).
Special case : Switzerland
If Switzerland is selected the TV controlling software first sweeps all TV bands with Europe
system selected (negative video modulation) and then a second time with France system
selected ( positive video modulation).
Special case : GB
Note for satellite receiver users : Before starting ATSS turn on your satellite receiver and tune to
SKY NEWS .
If GB is selected the TV controlling software seeks for programs only in UHF ( C21 to C70 ).
The
sorting order is :
1 - BBC1
2 - BBC2
3 - ITV
4 - CH4
5 - CH5
6 ? NEWS (Sky News)
If two or more identical programs ( same name but different code e.g. BBC1 and BBC1
Scotland ) are found the following programs in the list will be shifted up. (1 - BBC1, 2 - BBC1, 3
-
BBC2, 4 - ITV, 5 - CH4, 6 - CH5, 7 - NEWS, ..)
If one of the programs above is not found, the associated program number remains empty (
freq.=467.25 MHz - Skip selected - no name ? system = GB).
example A : 1 - BBC1, 2 - BBC2, 3 - ITV, 4 - -----, 5 - CH5, 6 - NEWS, ...
example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - ITV, 5 - -----, 6 - CH5, 7 -
NEWS, ...

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2 SAFETY 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 25-26 KV (20 -21 ) or 26 KV (25 - 28 ) at max beam current. The
high
voltage must not, under any circumstances, exceed 27.5 KV (20 ), 29KV (21 ), 29.5 KV (25 )
or
30 KV (28 ). 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, 5O Hz. 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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3 ALIGNMENT INSTRUCTIONS
3.1MICROCONTROLLER CONFIGURATION : SERVICE MODE
To switch the TV set into service mode please see instruction below.
1 - Select PR. number 91
2 - Adjust sharpness to minimum and exit all menus.
3 - Within 2 seconds press the key sequence : RED - GREEN - menu
The software version is displayed beside the word Service, e.g. SERVICE V1.00 .
To exit SERVICE menu press menu key or Std By key.
3.2SERVICE MODE NAVIGATION
Pr Up/Down remote keys : cycle through the service items available.
Vol -/+ remote keys : Dec./Increment the values within range - Cycle trough option bits.
OK key : Toggle bits in option byte
Order Item Default setting
1 HOR CEN
2 RED GAIN
3 GRN GAIN
4 BLUE GAIN
5 RED BIAS
6 GRN BIAS
7 AGC LEVEL
8 G2 - SCREEN
9AFT
10 OPTION1
11 OPTION2
12 PARABOLA
13 HOR WIDTH
14 CORNER T
15 CORNER B
16 HOR. PARAL
17 V. LINEAR
18 EW TRAPEZ
19 S CORRECT
20 VERT CENT
21 VERT SIZE
3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS
There are two option bytes available (16 bits in all). These option bits are available from Service
mode. First find the OPTION1 or OPTION2 control, and then use the Volume PLUS/MINUS
buttons on the remote control keypad to locate the bits, and OK key to toggle them. The table
below shows the two option bytes available;

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3.3.1 OPTION 1
B7 B6 B5 B4 B3 B2 B1 B0
TOP FASTEXT TUBE Headphone Dolby SVHS Tuner options
1 text (FLOF) 4:3 Volume/Balance Virtual 3 00 = Philips
OFF OFF control OFF OFF disable 01 = not used
TOP FASTEXT TUBE Headphone Dolby SVHS 10 = ALPS
0 text ON (FLOF) 16:9 Volume/Balance Virtual 3 11 = PARTSNIC
ON control ON ON enable (DW)
3.3.2 OPTION 2
B7 B6 B5 B4 B3 B2 B1 B0
1 Fixed to ‘0’ JVC remote control AVL control OFF PICTURE TILT ON Program list enabled
See table below.
0 Daewoo Remote control AVL control ON PICTURE TILT OFF Program list disabled
Beam Current
Tube (mA) B2 B1 B0
Nominal Max
0.95 1.10 0 0 0
1.00 1.15 0 0 1
4/3 - Super Flat, 16/9 – Super Flat 1.05 1.20 0 1 0
1.10 1.25 0 1 1
1.20 1.35 1 0 0
1.25 1.40 1 0 1
4/3 - Real Flat, 16/9 – Real Flat 1.30 1.45 1 1 0
1.35 1.50 1 1 1
All values modified are immediately memorised in eeprom.
3.4 TV SET ALIGNMENT
3.4.1 LOCAL OSCILLATOR ALIGNMENT
Tune a colour bar pattern. The frequency of the signal carrier must be accurate ( Max +/- 10KHz deviation from the
nominal channel frequency).
Find AFT item in service mode.
Adjust the coil L150 to bring the cursor to central position : 32.
3.4.2 G2 ALIGNMENT
- Tune a colour bar pattern.
- Find the G2 - SCREEN item in service mode.
- Adjust screen volume ( on FBT ) to bring the cursor to central position : 32.

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3.4.3 WHITE BALANCE
- Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature.
- Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature.
3.4.4 FOCUS
Adjust the Focus volume ( on FBT ) to have the best resolution on screen.
3.4.5 VERTICAL GEOMETRY
Adjust V. LINEAR (linearity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude), VERT CENT (vertical
centring) to compensate for vertical distortion.
3.4.6 HORIZONTAL PICTURE CENTRING
Adjust HOR CEN (Horizontal centre) to have the picture in the centre of the screen.
3.4.7 EAST / WEST CORRECTION
Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, to compensate for
geometrical distortion.
HOR PARAL
HOR WIDTH
adjust for 93% overscan.

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PARABOLA
CORNER B & CORNER T
EW TRAPEZ
3.4.8 AGC
- Make sure option bits are correct for the tuner fitted on the chassis (See above how to change option bits).
- Adjust the antenna signal level at 64 dB V± 2
- Tune a colour bar pattern.
- Find the AGC item in service mode.
- Press the key OK on the remote keypad and wait until AGC level stabilise to the optimum value.
- Alternatively, use Vol Up/Dwn keys to adjust manually to the desired Tuner Take Over Point (TOP).

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4 IC DESCRIPTION
4.1 TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER
TVText Pro is a 8-bit controller based on a enhanced 8051 core with embedded teletext, On screen Display and TV
controller functions.
4.1.1 BLOCK DIAGRAM OF THE SDA55XX
4.1.2 DESCRIPTION
The SDA 55xx is a single chip teletext decoder for decoding World System Teletext data as well as Video
Programming System (VPS), Program Delivery Control (PDC), and Wide Screen Signalling (WSS) data used for PAL
plus transmissions (line 23).
The device provides an integrated general-purpose, fully 8051-compatible Microcontroller with television specific
hardware features. The microcontroller has been enhanced to provide powerful features such as memory banking,
data pointers and additional interrupts etc.
The on-chip display unit for displaying Level 1.5 teletext data is also used for customer defined on-screen displays.
Internal XRAM consists of 16 Kbytes. Device has an internal ROM of 128 Kbytes.
The SDA 55xx supports a wide range of standards including PAL, NTSC and contains a digital slicer for VPS, WSS,
PDC, TTX and Closed Caption, an accelerating acquisition hardware module, a display generator for Level 1.5 TTX
data and powerful On screen Display capabilities based on parallel attributes, and Pixel oriented characters (DRCS).
The 8-bit Microcontroller runs at 360 ns. cycle time (min.). Controller with dedicated hardware does most of the
internal TTX acquisition processing, transfers data to/from external memory interface and receives/transmits data via I
2 C-firmware user-interface. The slicer combined with dedicated hardware stores TTX data in a VBI buffer of 1
Kilobyte. The Microcontroller firmware performs all the acquisition tasks (hamming-and parity-checks, page search

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and evaluation of header control bits) once per field. Additionally, the firmware can provide high-end Teletext-features
like Packet-26-handling, FLOF, TOP and list-pages.
4.1.3 IC MARKING AND VERSION
Chassis IC marking OSD languages ATSS countries Text
CP830 BULGARIAN, Austria, Belgium,
CZECH, GERMAN, Switzerland, Czech
DANISH, SPANISH, Republic, Germany,
FRENCH, FINNISH, Denmark, Spain, PAN-EUROPEAN
ENGLISH, GREEK, France, Finland, GB, LATIN, CYRILLIC,
HUNGARIAN, Greece, Hungary, Italy, GREEK.
ITALIAN, Ireland, Norway,
NORWEGIAN, Netherlands, Portugal,
DUTCH, POLISH, Poland, Sweden,
ROMANIAN, Slovak Republic,
RUSSIAN, Others
SWEDISH,
SLOVAKIAN.
4.1.4 PINNING
PSDIP 52-pin Pin Name Type Short Description
1 SCL IN/OUT Software driven I2C bus Clock line
2 SDA IN/OUT Software driven I2C bus Data line
3 S/SW2 IN Slow switching control for SCART 2.
4 S/SW2 IN (See Microcontroller I/O pin configuration)
5 S/SW1 IN Slow switching control for SCART 1.
6 S/SW1 IN (See Microcontroller I/O pin configuration)
7 n.c.
8 Reset Out OUT Driven by controlling software to reset video IC s.
9 VDD2.5 IN Supply voltage 2.5V
10 VSS IN Ground (0V)
11 VDD3.3 IN Input/Output 3.3V
12 CVBS IN CVBS input for the acquisition circuit
13 VDDA2.5 IN Supply voltage for analog components
14 VSSA IN Ground for analog components
15 AFT IN ADC input, AFT input
16 AGC IN ADC input, for AGC alignment only
17 KEY IN ADC input, local key sensing
18 OCP IN Switch Off the set when the voltage goes below a trigger level
19 HS IN Horizontal sync for OSD/Txt synchronisation
20 VS IN Vertical sync for OSD/Txt synchronisation
21 MODESW OUT High : Negative video modulation (B, G, D, K,I)
Low : Positive video modulation (L / L )
22 L/L OUT High : L , Low : L
23 IR IN Remote control signal input
24 INT IN Interrupt input from audio processor

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PSDIP 52-pin Pin Name Type Short Description
25 n.c.
26 n.c.
27 n.c.
28 n.c.
29 VSS IN Ground (0V)
30 VDD3.3 IN Input/Output 3.3V
31 n.c.
32 n.c.
33 RESET IN A low level on this pin resets the device.
34 XTAL2 OUT Output of the inverting oscillator amplifier
35 XTAL1 IN Input of the inverting oscillator amplifier
36 VSSA IN Ground for analog components
37 VDDA2.5 IN Supply voltage for analog components
38 R OUT OUT Red output
39 G OUT OUT Green output
40 B OUT OUT Blue output
41 BK OUT OUT Blanking
42 VDD2.5 IN Supply voltage 2.5V
43 VSS IN Ground (0V)
44 VDD3.3 IN Input / Output 3.3V
45 n.c.
46 n.c.
47 n.c.
48 AGC OUT Tuner TOP adjustment
49 n.c.
50 n.c.
51 LED OUT High : Green LED, Low : Red LED
52 POWER OUT High : SMPS ON, Low : SMPS in stand by
4.2 VSP9412A - SCAN RATE CONVERTER INCLUDING MULTISTANDARD COLOUR DECODER
The VSP 94x2A comprises all main functions of a digital featurebox in one monolithic IC.
The device comprises a digital multistandard color decoder, a RGB interface with fast-blank capability (SCART), digital
ITU656 input, scaling units including panorama, embedded DRAM for upconversion, picture improvements, temporal
noise reduction as well as A/D and D/A converter.