Daewoo CHASSIS : SC-150 Model : DSC-3220E User manual

Service Manual
Color Television
CHASSIS : SC-150
Model : DSC-3220E/3220L
S/M No. : DSC150BEF0
DEC . 2002
DAEWOO ELECTRONICS Corp.
http ://svc.dwe.co.kr

Service manual SC-150
-1-
Contents
1 - Main features ........................................................................................................................................................ 4
1-1Specifications .................................................................................................................................................. 4
1-2Channeltable .................................................................................................................................................. 8
1-3 ATSS sorting method....................................................................................................................................... 11
2 - Safety instruction ................................................................................................................................................. 13
3 - Alignment instructions ........................................................................................................................................ 14
3-1 Microcontroller configuration :Service mode ................................................................................................... 14
3-2Service mode navigation ................................................................................................................................. 14
3-3 Microcontroller configuration :Option .............................................................................................................. 15
3-4TV set Alignment ............................................................................................................................................. 15
3-4-1 Localoscillatoralignment .................................................................................................................... 15
3-4-2 G2alignment....................................................................................................................................... 15
3-4-3 Whitebalance ..................................................................................................................................... 15
3-4-4 Focus .................................................................................................................................................. 15
3-4-5 Verticalgeometry ................................................................................................................................ 15
3-4-6 Horizontalpicture centring................................................................................................................... 16
3-4-7 East/Westcorrection ........................................................................................................................... 16
3-4-8 AGC .................................................................................................................................................... 17
4 - IC description ....................................................................................................................................................... 18
4-1VCT383xATV signal processor -Teletext decoder with embedded 8 bit -
Controller ............................................................................................................................................................ 18
4-1-1 Block diagram off theVCT................................................................................................................... 18
4-1-2 TV-signal Processor ........................................................................................................................... 18
4-1-2 -Controller
...................................................................................................... . ................................... 1 9
4-1-4 Teletext Features ................................................................................................................................ 19
4-1-5 Displaty OSD Features...................................................................................................................... 20
4-1-6 Audio Features ................................................................................................................................... 20
4-1-7 General Features ............................................................................................................................... 20
4-1-8 DataCapture....................................................................................................................................... 20
4-1-9 DataCaptureFeatures........................................................................................................................ 20
4-1-10 TV processor version and -Controller capacity .............................................................................. 21
4-1-11 IC marking and version ....................................................................................................................... 21
4-1-12 Pinning ................................................................................................................................................ 21
4-2 MSP341x Multistandard Sound Processor ................................................................................................... 24
4-2-1 Basic Features of the MSP 341x ......................................................................................................... 24
4-3TDA4470 - MultistandardVideo-IF and Quasi Parallel Sound Processor ...................................................... 28
4-3-1 Description .......................................................................................................................................... 28
4-3-2 Features .............................................................................................................................................. 28
4-3-3 Pinning ................................................................................................................................................ 28
4-3-4 Block diagram .................................................................................................................................... 29
4-4TDA894xJ Stereo Audio Amplifier ................................................................................................................. 30
4-4-1 Features ............................................................................................................................................... 30
4-5TDA835xJ Vertical Amplifier ........................................................................................................................... 32
4-5-1 TDA8357J ........................................................................................................................................... 32

Service manual SC-150
-2-
4-5-2 TDA8358J .............................................................................................................................................. 33
4-6TDA6107Q .......................................................................................................................................................... 33
4-7 24C16 - 16 Kb EEPROM .................................................................................................................................... 35
4-8 STR - F6653....................................................................................................................................................... 36
4-8-1 General description ............................................................................................................................... 36
4-8-2 Features ................................................................................................................................................. 36
4-8-3 Block diagram ....................................................................................................................................... 36
4-8-4 Pin description ...................................................................................................................................... 37
4-8-5 Control part - electrical characteristics ................................................................................................. 37
4-8-6 MOSFET electrical characteristics ....................................................................................................... 38
4-9 CXA1315P
4-10 CXA1315P
......................................................................................................................................................... 39
4-9-1 General description................................................................................................................................ 39
4-9-2 Features ................................................................................................................................................39
4-9-3 Block diagram ........................................................................................................................................
4-9-4 Pin Description........................................................................................................................................39
40
..........................................................................................................................................................40
4-10-1 General description................................................................................................................................ 40
4-10-2 Features ................................................................................................................................................40
4-10-3 Block diagram ........................................................................................................................................40
4-10-4 Pin Description........................................................................................................................................40
4-11 LA6515 ..........................................................................................................................................................40
4-11-1 General description................................................................................................................................ 40
4-11-2 Features ................................................................................................................................................40
4-11-3 Block diagram ........................................................................................................................................40
4-11-4 Pin Description........................................................................................................................................40
5 - Circuit description..................................................................................................................................................
5-1 Block diagram.................................................................................................................................................... 43
43
5-2 IF section............................................................................................................................................................ 44
5-2-1 Block diagram ....................................................................................................................................... 44
5-2-2 Vision IF Amplifier .................................................................................................................................. 44
5-2-3 Tuner-andVIF-ACG ................................................................................................................................ 45
5-2-4 FPLL,VCO and AFC .............................................................................................................................. 45
5-2-5 Video Demodulation and Amplifier ...................................................................................................... 46
5-5-6 Sound IF Amplifier and SIF-AGC ....................................................................................................... 46
5-2-7 Quasi-Parallel-Sound (QPS)Mixer ......................................................................................................... 46
5-2-8 Standard Switch .................................................................................................................................... 46
5-2-9 LSwitch.................................................................................................................................................. 46
5-2-10 Internal Voltage Stabiliser ..................................................................................................................... 46
5-3Video -VCT description ...................................................................................................................................... 47
5-3-1 Introduction ............................................................................................................................................ 47
5-3-2 Video Front-end..................................................................................................................................... 47
5-3-3 Input Selector ........................................................................................................................................ 47
5-3-4 Clamping ................................................................................................................................................ 47
5-3-5 Automatic Gain Control ........................................................................................................................ 47
5-3-6 Digitally Controlled Clock Oscillator..................................................................................................... 47
5-3-7 Analogue Video Output ........................................................................................................................ 47
5-3-8 Adaptive Comb Filter (VCT3834A only)................................................................................................ 48
5-3-9 Color Decoder ....................................................................................................................................... 48
5-3-10 Horizontal Scaler................................................................................................................................... 48
5-3-11 Video Sync Processing ........................................................................................................................ 49
5-3-12 Display Processing................................................................................................................................ 49
5-3-13 Chroma Transient Improvement............................................................................................................ 49
5-3-14 Video Back-end ..................................................................................................................................... 49
5-3-15 CRT Measurement and Control........................................................................................................... 50
5-3-16 Average Beam Current Limiter ............................................................................................................. 50

Service manual SC-150
-3-
Fo
5-4-1 Introduction........................................................................................................................................... 51
5-4-2 CPU ...................................................................................................................................................... 51
............................................................................... 52
5-4-4 Tuning .................................................................................................................................................. 52
5-4-5 Automatic rmat switching and WSS ............................................................................................... 52
5-4-6 EXTERNAL source control logic........................................................................................................... 54
5-4-7 Over Current Protection........................................................................................................................ 55
5-5Teletext Display ................................................................................................................................................. 55
5-6 Sound processing............................................................................................................................................... 56
5-6-1 Analogue sound IF-input section............................................................................................................ 56
5-6-2 Quadrature Mixers................................................................................................................................ 56
5-6-3 Phase and AM discrimination........................................................................................................... 56
5-6-4 NICAM decoder.................................................................................................................................... 57
5-6-5 DSP section.......................................................................................................................................... 57
5-6-6 Sound Mode switching.......................................................................................................................... 57
5-7 Sound amplification........................................................................................................................................... 57
5-7-1 Power amplifier..................................................................................................................................... 57
5-7-2 Modeselection....................................................................................................................................... 58
5-8 Vertical deflection............................................................................................................................................. 58
5-8-1 Flyback voltage..................................................................................................................................... 58
5-8-2 Protection.............................................................................................................................................. 58
5-8-3 Guardcircuit.......................................................................................................................................... 58
5-8-4 Damping resistor................................................................................................................................... 58
5-8-5 EAST-WEST Amplifier (TDA8358J only)............................................................................................... 58
5-9 Power supply (STR F6653).. .............................................................................................................................. 59
5-9-1 STR-F6654 generaral description......................................................................................................... 59
5-9-2 Power supply primary part operations................................................................................................... 59
5-10TV start-up,TV normal run and stand by mode operations............................................................................... 63
5-10-1 TV start-up operations.......................................................................................................................... 63
5-10-2 TV normal run and stand-by mode operations....................................................................................... 64
6 - Se
6 -1 Service part list
rvice parts list..................................................................................................................................................
...........................................................................................................................................
.69
69
6 -2 Service part list option ............................................................................................................................... 79
7 - ExplodedView ........................................................................................................................................................ 80
.............................................................................................................. .......................................... 81
.............................................................................................................. .......................................... 83
8 - PCB Layout
......................................................................................................... .......................................... 81
8 -1 MAIN PCB
......................................................................................................... .......................................... 82
8 -2 UNION PCB
9 - Circuit Diagram
.......................................................................................... .......................................... 83
9 - 1 Circuit Diagram(MAIN)
........................................................................................ .......................................... 84
9 - 2 Circuit Diagram
(UNION)
5-4-3 -Controller I/O pin configuration and function
5-3-17 Analogue RGB Insertion .....................................................................................................................50
5-3-18 Fast-Blank Monitor ................................................................................................................................ 50
5-3-19 Vertical and East/West Deflection ....................................................................................................... 50
5-3-20 EHTCompensation................................................................................................................................ 51
5-3-21 Reset Function ...................................................................................................................................... 51
5-3-22 Standby and Power-On ........................................................................................................................ 51
5-4Micro-controller......................................................................................................................................................... 51

Service manual SC-150
-4-
1- Main Features
1-1 Specifications
TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L'
Sound system NICAM B/G, I, D/K, L,
FM 2Carrier B/G, D/K
Power consumption
Sound Output Power 7W x2 (at 1KHz, 60% mod, 10% THD)
Speaker
10W(Normal) 8 ohm X 2
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
V
isual screen 32" : 76Cm
Channel indication On Screen Display
program Selection 100 programmes
Aux. terminal
Remote Control Unit R-46G22
32" 16:9 Real Flat : 110W approx.
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 right side of cabinet.
Headphone jack (3.5 mm) on right side of cabinet
SVHS3 : Jack on right side of cabinet - sound input common with AV3.
Monitor Out

Service manual SC-150
-5-
Specification matrix
Chassis Name
3834
A
R46G22
4859812224(MAIN)/ 4959812324(Union)
16:9 Real Flat
Auto / 4:3 / 14:9 / Zoom 14:9 /Zoom
16:9 / Full Screen
3410G
Off / Spatial
Dedicated
10 Page
Available : Selectable in factory /
Service mode by option bits
Available : Selectable in factory /
Service mode by option bits
"Pan-European Latin, Cyrillic, Greek"
"English, French, German, Italian, Spanish,Dutch, Danish,
Finnish, Norwegian, Swedish, Greek,Polish, Czech, Slovakian,
Romanian, Russian, Bulgarian, Hungarian
"Philips, Alps,Partsnic"
3411G
Off / Spatial / Panorama /
Dolby Virtual
SC-150
VCT Version
Software Version
Remote Control
PCB Serial Number
Tube
SVHS 3
"Picture Improvements,
Comb Filter, Horizontal Scaler"
Teletext Split Screen
Formats Available in Video Mode
AV2 Monitor Output
MSP Version
Sound Dffects
Graphic Equalizer
AV3 Audio Input
Teletext Page Memory
Top Teletext
Flof Teletext
Text Character Support
OSD Languages
Tuner Options
Model Name DSC-3220E DSC-3220L

Service manual SC-150
-6-
21 Pin EURO-SCART 1 :
Pin Signal Description Matching value
1 Audio Output Right 0.5 Vrms, Impedance < 1 , ( RF 54% Mod )
2 Audio Input Right 0.5 Vrms, Impedance > 10
3 Audio Output Left 0.5 Vrms, Impedance < 1 , ( RF 54% Mod )
4 Audio Earth
5 Blue Earth
6 Audio Input Left 0.5 Vrms, Impedance > 10
7 Blue Input 0.7 Vpp ±0.1V, Impedance 75
8 Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V ,
Impedance > 10
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
21 Pin EURO-SCART 2 :
Pin Signal Description Matching value
1 Audio Output Right 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) - Not available for cp885
2 Audio Input Right 0.5 Vrms, Impedance > 10
3 Audio Output Left 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) - Not available for cp885
4 Audio Earth
5 Earth
6 Audio Input Left 0.5 Vrms, Impedance > 10
7 N.C.
8 Slow Switching TV: 0 to 2V, AV 16:9: 4.5V to 7V, AV 4:3: 9.5 to 12V
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

Service manual SC-150
-7-
19 Video Output 1 Vpp 3dB, Impedance 75 ( Monitor output ) - Not available for cp885
20 Video Input,Y In. 1 Vpp 3dB, Impedance 75
21 Common Earth

Service manual SC-150
-8-
CH EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT
C01 46.25 - 47.75 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
1-2 Channel table
FREQUENCY TABLE

Service manual SC-150
-9-
CH EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT
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
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

Service manual SC-150
-10-
CH EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT
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
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

Service manual SC-150
-11-
1-3 ATSS sorting method
The TV set sweeps all the TV bands from beginning ofVHF 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 noVPS CNI code is found, then the system check if a CNI code is transmitted as part of the teletext transmission
( Packet 8/30 format 1 ). If such a code ( VPS or teletext ) is found and if this code is in theATSS 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 pro grams 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 pro grams with a strong signal strength which are not listed in group I.
Group III : It contains all the pro grams 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.
Program
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
Group Skip Program
number
1
... Group II
m
m+1
... Group III
p
p+1
... Group IV
q
q+1
.... not used
99
0
Group Skip
Special case : Country selection = Others
Special case : France
Note : If two programs with the same name but a different code ar e found these two programs are listed in
group I, II or III ( e.g. Regional program SW3 in Germany ).

Service manual SC-150
-12-
The sor ting order within group II, III, and IV is based on the channel frequency. The Pro gram with the lo west
frequency is allocated the first rank in its group, and so f orth until the last program of the group which has the
highest fr equency.
If France is selected, the TV controlling softw are first swe eps all TV bands with Fr ance system selected
( positive video modulation) and the a second time with Europe system selected ( negative video modulation).
Special case : Switzerland
If Switzerland is selected the TV controlling softw are first s weeps all TV bands with Eur ope system selected
(negative video modulation) and then a second time with France system selected ( positive video modulation).
Special case : GB
Note for sa tellite recei ver users : Before starting ATSS tur n On your satellite r ecei ver and tune “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
If two or more “identical”pr ograms ( same name but different code e.g. BBC1 and BBC1 Scotland ) are found
the following pro grams 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 progr am abo ve is not f ound, 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 - NEW S , ...
example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - IT V, 5 - -----, 6 - CH5, 7 -NEWS, ...
Special case : France

Service manual SC-150
-13-
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
26 KV (25”- 28”) at max beam current. The high voltage must not, under any circumstances,
exceed 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
1. 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.
1) Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary
when working on high voltage equipment.
2) 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.
2. If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement Parts List.
3. When replacing a high wattage resistor ( metal oxide film resistor) in the circuit board, keep the resistor
10 mm away from circuit board.
4. Keep wires away from high voltage or high temperature components.
5. This receiver must operate underAC 230 volts, 5O Hz. NEVER connect to DC supply or any other power 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.

Service manual SC-150
-14-
3 -Alignment instructions
3-1 Microcontroller 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 menu.
3 - Quickly press the key sequence : RED - GREEN - menu
To software version is displayed beside the word Service, e.g. “SERVICE V2.00A”.
To exit SERVICE menu press menu key or Std By key.
3-2 Service mode navigation
Pr Up / Down remote keys : cycle through the service itemsavailable.
Vol- / + remote keys : Decrement / Increment the values within range.
0~7 digit keys : Toggle bits 0~7 in option byte
Order Item
Default settingh for SC-150
1 PARABOLA +124
2 HOR WIDTH -1350
3 CORNER -97
4 HOR.PARAL -1
5 V.LINEAR 0
6 EW TRAPEZ -30
7 S CORRECT -21
8 H BOW +100
9 VERT SIZE +157
10 VERT CENT +3889
11 RED GAIN +97
12 GRN GAIN +87
13 BLUE GAIN +95
14 RED BIAS +128
15 GRN BIAS +128
16 HOR CEN 92
17 AGC LEVEL -
18 G2-SCREEN -
19 AFT -
20 OPTION1
OPTION2
-
-
21
22 MAXVOL
Not used

Service manual SC-150
-15-
3-3 Microcontroller configuration : Option bits
These option bits are available from Service mode. First find the OPTION control, and then use keys 0...7 on the
remote keypad to control bits 0 to 7 respectively. The table below shows the options a vailable ;
1
0
B7 B6
TOP text
off FASTEXT FLOF off
TOP text
on FASTEXT
(FLOF) on
B5 B4 B3 B2 B1 B0
TUBE 4:3
AUTO 4:3
switch to
PANORAMA
TUBE 16:9 AUTO 4:3
switch to 4:3
SVHS3
disable 00=Philips
01=ALPS
10=Philips (AGC intern)
11=DAEWOO
SVHS3
enable
X
Set all the unused bits, markde 'X', to be 0 for future compatibility.
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 fron 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.
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 REC, GRN and BLUE GAIN to the desired dolour temperature.
3-4-4- Forcus
Adjust the Forcus volume (on FBT) to have the best resolution on screen.
3-4-5- Vertical geometry
Adjust V.LINEAR (linearity), S CORRECT
(S. Corrention), VERT SIZE (Vertical amplitude),
VERT CENT (vertical centing) to compensate
for vertical distortion.
OPTION 1
1
0
B7 B6
YY
B5 B4 B3 B2 B1 B0
PICTURE
TILT on
YPICTURE
TILT off
See table below.
OPTION 2 bits B2 B1 B0
Normal I
brightness
Normal I
brightness
+5 steps
OPTION 2
Tuner options

Service manual SC-150
-16-
HOR PARAL
H BOW
HOR WIDTH
PARAROLA
3-4-6- Horizontal picture centring
Adjust HOR CEN(Horizontal center) to have the picture in the center of the screen.
3-4-7- Eau/West comection
Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, H BOW, to compensate for
geometrical distorrin,
For HOR WIDTH, adjust for 91% overscan.

Service manual SC-150
-17-
CORNER
EW TRAPEZ
3-4-8- AGC
- Adjust the antenna signal level at 70 dB V 2
- Tune a colour bar pattern.
- Find the “AGC”item in service mode.
- Adjust AGC volume ( RB10 ) to bring the cursor to central position : 32.

Service manual SC-150
-18-
4 - IC description
4-1 VCT383XA TV signal processor - Teletext decoder with embedded 8 bit - Controller.
4-1-1- Block diagram of the VCT
4-1-2- TV-signal Processor
Four composite video inputs, two S-VHS inputs
AnalogueYC r C b input
Composite video monitor
Multistandard colour decoder ( 1 crystal )
Multistandard sync decoder
Black-line detector
Adaptive 2H comb filterY/C separator
VIN
VRT SGND VSUPAF GNDAF VSUPD GNDD VERT EW PROT HOUT HFLB SENSE RSW GNDM VRD XREF
Video
Front-end Comb Filter Color Decoder Panorama Scaler
Display
Processor
Pict. Improv
Video
Back-end
Audio
CIN
VOUT
4
22 2
3
4
2
2
3
3RGBOUT
SVM
RGBIN
VSUPAB
GNDAB
AOUT
AIN
I2C
I2C Master
I2C
MSync
Color, Prio
VSync
8-bit PWM
14-bit PWM
15:1 Mux
10-bit ACD
2 Timer
2 CapCom
96 kB
CPU ROM
ADB, DB, CB
16 kB
Text
RAM
3 kB
OSD RAM
TPU
Video
24 kB ROM
31
12
1 kB
CPU RAM
CPUDMA
8
BE
RDY
Watchdog
24 IO Ports
RESQ
TEST
XTAL1
XTAL2
CLK20
CNDP1
VSUPP1
Pxy
GNDS
VSUPS
Clock
Oscillator
Reset
Logic
VCT 38xx

Service manual SC-150
-19-
Horizontal scaling ( 0.25 to 4 )
Panoramavision
Black-level expander
Dynamic peaking
Soft limiter (gamma correction)
Colour transient improvement
Programmable RGB matrix
Analogue RGB/Fastblank input
Half-contrast switch
Picture frame generator
Scan velocity modulation output
High-performance H/V deflection
Angle and bow correction
Separate ADC for tube measurements
EHT compensation
4-1-3- -Controller
8-bit, 10-Mhz CPU (65C02)
96 kB program ROM on chip
1 kB program RAM on chip
memory banking
16-input, 16-level interrupt controller
patch module for 10 ROM locations
two 16-bit reloadable timers
capture compare module
watchdog timer
14-bit PWM for voltage synthesis
Four 8-bit PWMs
10-bit ADC with 15:1 input MUX
I2C bus master interface
24 programmable I/O ports
80C51 -controller core standard instruction set and timing
1 s machine cycle
32-128Kx8-bit late programmed ROM
3-12Kx8-bit Auxiliary RAM (shared with Display and Acquisition)
Interrupt controller for individual enable/disable with two level priority
Two 16-bit Timer/Counter registers
WatchDog timer
Auxiliary RAM page pointer
16-bit Data pointer
IDLE and Power Down (PD) mode
14 bits PWM for Voltage Synthesis Tuning
8-bit A/D converter
4 pins which can be programmed as general I/O pin, ADC input or PWM (6-bit) output
4-1-4- Teletext Features
Four programmable video inputs
Adapt ive data slicer
Signal quality detection
WST, PDC, VPS, and WSS acquisition