Daewoo WP-895 User manual

Service Manual
S/M No.:TWP895BEF0R2
DAEWOO ELECTRONICS CO.,LTD
http : //svc.dwe.co.kr Jun. 2002
Colour Television
CHASSIS
WP-895
WP-895F
CP-885
CP-885F
CP-485F
✔ 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 (http://svc.dwe.co.kr).

- 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 ............................................................................................................................................. 16
3-4-1 Localoscillatoralignment .................................................................................................................... 16
3-4-2 G2alignment....................................................................................................................................... 16
3-4-3 Whitebalance ..................................................................................................................................... 16
3-4-4 Focus .................................................................................................................................................. 16
3-4-5 Verticalgeometry................................................................................................................................ 16
3-4-6 Horizontalpicturecentring................................................................................................................... 16
3-4-7 East/Westcorrection ........................................................................................................................... 16
3-4-8 AGC.................................................................................................................................................... 18
4 - IC description ....................................................................................................................................................... 19
4-1VCT383xATV signal processor -Teletext decoder with embedded 8 bit -
Controller ............................................................................................................................................................ 19
4-1-1 Block diagram off theVCT................................................................................................................... 19
4-1-2 TV-signal Processor ........................................................................................................................... 19
4-1-2 -Controller .......................................................................................................................................... 20
4-1-4 Teletext Features ................................................................................................................................ 20
4-1-5 Displaty OSD Features...................................................................................................................... 21
4-1-6 Audio Features ................................................................................................................................... 21
4-1-7 General Features ............................................................................................................................... 21
4-1-8 DataCapture....................................................................................................................................... 21
4-1-9 DataCaptureFeatures........................................................................................................................ 21
4-1-10 TV processor version and -Controller capacity .............................................................................. 22
4-1-11 IC marking and version ....................................................................................................................... 22
4-1-12 Pinning ................................................................................................................................................ 22
4-2 MSP341x Multistandard Sound Processor ................................................................................................... 25
4-2-1 Basic Features of the MSP 341x ......................................................................................................... 25
4-3TDA4470 - MultistandardVideo-IF and Quasi Parallel Sound Processor ......................................................29
4-3-1 Description .......................................................................................................................................... 29
4-3-2 Features .............................................................................................................................................. 29
4-3-3 Pinning ................................................................................................................................................ 29
4-3-4 Blockdiagram.................................................................................................................................... 30
4-4TDA894xJ Stereo Audio Amplifier ................................................................................................................. 31
4-4-1 Features ............................................................................................................................................... 31
4-5TDA835xJ Vertical Amplifier ........................................................................................................................... 33
4-5-1 TDA8357J ........................................................................................................................................... 33
Service manual WP-895/895F. CP885/885F. CP485F

- 2 -
4-5-2 TDA8358J ..............................................................................................................................................34
4-6TDA6107Q..........................................................................................................................................................35
4-7 24C16 - 16 Kb EEPROM....................................................................................................................................38
4-8 STR - F6653.......................................................................................................................................................39
4-8-1 General description...............................................................................................................................39
4-8-2 Features.................................................................................................................................................39
4-8-3 Blockdiagram.......................................................................................................................................39
4-8-4 Pin description......................................................................................................................................40
4-8-5 Control part-electrical characteristics.................................................................................................40
4-8-6 MOSFET electrical characteristics.......................................................................................................41
5 - Circuit description..................................................................................................................................................42
5-1 Block diagram....................................................................................................................................................42
5-2 IF section............................................................................................................................................................43
5-2-1 Blockdiagram.......................................................................................................................................43
5-2-2 Vision IF Amplifier..................................................................................................................................43
5-2-3 Tuner-andVIF-ACG................................................................................................................................44
5-2-4 FPLL,VCO and AFC..............................................................................................................................44
5-2-5 Video Demodulation and Amplifier......................................................................................................45
5-5-6 Sound IF Amplifier and SIF-AGC.......................................................................................................45
5-2-7 Quasi-Parallel-Sound(QPS) Mixer.........................................................................................................45
5-2-8 Standard Switch....................................................................................................................................45
5-2-9 L’Switch..................................................................................................................................................45
5-2-10Internal Voltage Stabiliser.....................................................................................................................45
5-3Video -VCT description......................................................................................................................................46
5-3-1 Introduction............................................................................................................................................46
5-3-2 Video Front-end.....................................................................................................................................46
5-3-3 Input Selector........................................................................................................................................46
5-3-4 Clamping ................................................................................................................................................46
5-3-5 Automatic Gain Control........................................................................................................................46
5-3-6 Digitally Controlled Clock Oscillator.....................................................................................................46
5-3-7 Analogue Video Output........................................................................................................................46
5-3-8 Adaptive Comb Filter (VCT3834A only)................................................................................................47
5-3-9 Color Decoder.......................................................................................................................................47
5-3-10Horizontal Scaler...................................................................................................................................47
5-3-11Video Sync Processing........................................................................................................................48
5-3-12Display Processing................................................................................................................................48
5-3-13Chroma Transient Improvement............................................................................................................48
5-3-14Video Back-end.....................................................................................................................................48
5-3-15CRT Measurement and Control...........................................................................................................49
5-3-16Average Beam Current Limiter.............................................................................................................49
5-3-17Analogue RGB Insertion......................................................................................................................49
5-3-18Fast-Blank Monitor................................................................................................................................49
5-3-19Vertical and East/West Deflection.......................................................................................................50
5-3-20EHTCompensation................................................................................................................................50
5-3-21Reset Function......................................................................................................................................50
5-3-22Standby and Power-On........................................................................................................................50
5-4Micro-controller.........................................................................................................................................................50
Service ma nual WP-895/895F. CP885/885F. CP485F

Fo
- 3 -
5-4-1Introduction...........................................................................................................................................50
5-4-2CPU......................................................................................................................................................50
...............................................................................51
5-4-4Tuning..................................................................................................................................................51
5-4-5Automaticrmatswitching andWSS...............................................................................................51
5-4-6EXTERNAL source control logic...........................................................................................................52
5-4-7Over Current Protection........................................................................................................................54
5-5Teletext Display.................................................................................................................................................54
5-6 Sound processing...............................................................................................................................................55
5-6-1Analogue sound IF-input section............................................................................................................55
5-6-2Quadrature Mixers................................................................................................................................55
5-6-3Phase and AM discrimination...........................................................................................................55
5-6-4NICAM decoder....................................................................................................................................56
5-6-5DSP section..........................................................................................................................................56
5-6-6Sound Modeswitching..........................................................................................................................56
5-7 Sound amplification...........................................................................................................................................56
5-7-1Power amplifier.....................................................................................................................................56
5-7-2Mode selection.......................................................................................................................................57
5-8Vertical deflection.............................................................................................................................................57
5-8-1Flybackvoltage.....................................................................................................................................57
5-8-2Protection..............................................................................................................................................57
5-8-3Guard circuit..........................................................................................................................................57
5-8-4Damping resistor...................................................................................................................................57
5-8-5EAST-WEST Amplifier (TDA8358J only)...............................................................................................57
5-9Power supply (STR F6653).. ..............................................................................................................................58
5-9-1STR-F6654 generaraldescription.........................................................................................................58
5-9-2 Power supply primary par t operations...................................................................................................58
5-10TV start-up, TV normal run and stand by mode operations...............................................................................62
5-10-1TV start-up operations..........................................................................................................................62
5-10-2TV normalrun and stand-by mode operations.......................................................................................63
6 - Service parts list...................................................................................................................................................68
7 - Exploded View........................................................................................................................................................86
8 - PCB Layout
9 - Circuit Diagram
Service manual WP-895/895F. CP885/885F. CP485F
5-4-3 -Controller I/O pin configuration and function
7-1 DWX-28W5
7-2 DWF-28W8
7-3 D T F-29U8
7-4 D T P-28A7
7-5 D T P-28B1
7-6 D T P-28G7
7-7 D T P-28G8
.......................................................................................................................................................
.......................................................................................................................................................
.......................................................................................................................................................
.......................................................................................................................................................
.......................................................................................................................................................
.......................................................................................................................................................
.......................................................................................................................................................
86
87
88
89
90
91
92
7-8 DWF-28W9
.............................................................................................................. . ............... . ........................ 93
7-9 DTB-21U7
.............................................................................................................. . ............... . .................... 94

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Service manual WP 895/895F, CP885/885F, CP485F
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 21” Real Falt : 59 W approx.
28” 4:3, FST : 69 W approx.
Sound Output Power21” : 4.5W x 2 (at 1kHz, 60% mod, 10%THD)
28”, 29" : 7W x 2 (at 1kHz, 60% mod, 10%THD)
Speaker21” : 7W 8 ohm x2
28”, 29” : 12W 8 ohm x2
Teletext system 10 pages memory FASTEXT (FLOF or TOP)
Aerial input 75 ohm unbalanced
Channel coverageOff-air channels, S-cable channels and hyperband
Tuning system frequency synthesiser tuning system
Visual screen 21” : 51 cm
28” : 66 cm
29” : 68 cm
Channel indication On Screen Display
Program Selection 100 programmes
Aux. terminal EURO-SCART 1 : Audio / Video In and Out, R/G/B In, Slow and
Fast switching.
EURO-SCART 2 : Audio / Video In and Out, SVHS In.
AV3 : Audio-Video Jack on front of cabinet.
Headphone jack (3.5 mm) on front of cabinet
SVHS3 (option) : Jack on front of cabinet - sound input common with AV3.
Remote Control Unit R-46G22
29" 4:3, REAL FALT : 74 W approx.
28” 16:9, WIDE : 69 W approx.
Monitor Out(option)

CHASSIS NAME WP-895 / CP-485F WP-895F CP885 CP885F
VCT VERSION 3834 3834 3832 3834
SOFTWARE VERSION A A B A
REMOTE CONTROL R46G22 R46G22 R46G22 R46G22
PCB SERIAL NUMBER 4859805093 4859805193 4859805093 4859805193
TUBE 16:09 16:9 REAL FLAT 4:03 4:3 REAL FLAT
SVHS3
"PICTURE IMPROVE-
MENTS, COMB FILTER,
HORIZONTAL SCALER"
TELETEXT SPLIT SCREEN
FORMATS AVAILABLE IN
VIDEO MODE
AUTO / 4:3 / 14:9 / ZOOM 14:9 /
ZOOM 16:9 / FULL SCREEN
AUTO / 4:3 / 14:9 / ZOOM 14:9 /
ZOOM 16:9 / FULL SCREEN
AUTO / FULL SCREEN / 14:9 /
16:9
AUTO / FULL SCREEN / 14:9 /
16:9 / WATERGLASS
AV2 MONITOR OUTPUT
MSP VERSION (OPTION) 3410 3411 3410 3411 3410 3415 3410 3411
SOUND EFFECTS OFF / SPATIAL OFF / SPATIAL
/ PANORAMA /
VIRTUAL
DOLBY
OFF / SPATIAL OFF / SPATIAL
/ PANORAMA /
VIRTUAL
DOLBY
OFF / SPATIAL OFF / SPATIAL OFF / SPATIAL OFF / SPATIAL
/ PANORAMA /
VIRTUAL
DOLBY
GRAPHIC EQUALIZER
AV3 AUDIO INPUT DEDICATED DEDICATED DEDICATED DEDICATED DEDICATED AV2 COMMON DEDICATED DEDICATED
TELETEXT PAGE MEMORY 10 PAGE 10 PAGE 10 PAGE 10 PAGE
TOP TELETEXT AVAILABLE : SELECTABLE IN FACTORY/SERVICE MODE BY OPTION BITS
FLOF TELETEXT AVAILABLE : SELECTABLE IN FACTORY/SERVICE MODE BY OPTION BITS
TEXT CHARACTER
SUPPORT
"Pan-European Latin, Cyrillic, Greek"
OSD LANGUAGES "English, French, German, Italian, Spanish, Dutch, Danish, Finnish, Norwegian, Swedish, Greek, Polish, Hungarian, Czech, Slovakian, Roma-
nian, Russian."
TUNER OPTIONS "Philips, Alps, Partsnic"
Specification matrix
Service manual WP 895/895F, CP885/885F, CP485F
- 5 -

- 6 -
Service manual WP 895/895F, CP885/885F, CP485F
21 Pin EURO-SCART 1 :
Pin Signal Description Matching value
1Audio Output Right 0.5 Vrms, Impedance < 1 , ( RF 54% Mod )
2Audio Input Right 0.5 Vrms, Impedance > 10
3Audio Output Left 0.5 Vrms, Impedance < 1 , ( RF 54% Mod )
4Audio Earth
5Blue Earth
6Audio Input Left 0.5 Vrms, Impedance > 10
7Blue Input 0.7 Vpp ±0.1V, Impedance 75
8Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V ,
Impedance > 10
9Green Earth
10 N.C.
11Green Input 0.7 Vpp 0.1V, Impedance 75
12 N.C.
13Red Earth
14Blanking Earth
15Red Input 0.7 Vpp 0.1V, Impedance 75
16Fast Switching 0 to 0.4V : Logic “0”, 1 to 3V : Logic “1”, Impedance 75
17Video Out Earth
18Video In Earth
19Video Output 1 Vpp 3dB, Impedance 75
20Video Input 1 Vpp 3dB, Impedance 75
21Common Earth
21 Pin EURO-SCART 2 :
Pin Signal Description Matching value
1Audio Output Right 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) - Not available for cp885
2Audio Input Right 0.5 Vrms, Impedance > 10
3Audio Output Left 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) - Not available for cp885
4Audio Earth
5Earth
6Audio Input Left 0.5 Vrms, Impedance > 10
7N.C.
8Slow Switching TV: 0 to 2V, AV 16:9: 4.5V to 7V, AV 4:3: 9.5 to 12V
9N.C.
10 N.C.
11 N.C.
12 N.C.
13Earth
14Earth
15Chroma Input 3dB for a luminance signal of 1 Vpp
16 N.C.
17Earth
18Video In Earth

- 7 -
Service manual WP 895/895F, CP885/885F, CP485F
19Video Output 1 Vpp 3dB, Impedance 75 ( Monitor output ) - Not available for cp885
20Video Input,Y In. 1Vpp 3dB, Impedance 75
21Common Earth

- 8 -
Service manual WP 895/895F, CP885/885F, CP485F
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

- 9 -
Service manual WP 895/895F, CP885/885F, CP485F
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

- 10 -
Service manual WP 895/895F, CP885/885F, CP485F
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

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Service manual WP 895/895F, CP885/885F, CP485F
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 andAustrian 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 haveVPS 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 bythe 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.
Program
number
1
2Group 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 are found these two programs are listed in
group I, II or III ( e.g. Regional program SW3 in Germany ).

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Service manual WP 895/895F, CP885/885F, CP485F
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.
If France is selected, the TV controlling software first sweeps all TV bands with France 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 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 “ 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” 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 program 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 - IT V, 5 - -----, 6 - CH5, 7 -NEWS, ...
Special case : France

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Service manual WP 895/895F, CP885/885F, CP485F
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 (21” - 29”) at max beam current. The high voltage must not, under any circumstances,
exceed 29.5 KV (21" - 25") or 30 KV (28" - 29"). 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 underAC220~ 240 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.

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Service manual WP 895/895F, CP885/885F, CP485F
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 V1.00A”.
To exit SERVICE menu press menukey 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 wp 895
1PARABOLA +140
2HOR WIDTH -1100
3CORNER -80
4HOR.PARAL -1
5V.LINEAR -2
6EW TRAPEZ -12
7S CORRECT -15
8H BOW +100
9VERT SIZE +145
10VERT CENT +3939
11RED GAIN +92
12GRN GAIN +87
13BLUE GAIN +95
14RED BIAS +128
15GRN BIAS +128
16HOR CEN 98
17AGC LEVEL -
18 G2-SCREEN -
19 AFT -
20 OPTION -
21MAXVOL Not used

3-3 Microcontroller configuration : Option bits
Bits in OPTION Bits in OPTION2
MICOM USED NOT USED
(set to ‘0’) USED NOT USED (set to ‘0’) COMMENTS
VCT3834A C4 DWO2
VCT3832A C4 DW03 7, 6, 5, 2, 1, 04, 3 OPTION2 does not exist Up to, but not including COB version 0.14
No tuner option 11
(ROM V1.00 A/B)
DW3834A-C4-AE2
DW3832A-C4-BE2 7, 6, 5, 4, 2, 1, 0 33, 2, 1, 0 7, 6, 5, 4 From V0.17 COB (ROM V2.00 A/B)
There are two option bytes available (16 bits in all). These option bits are available from Service
mode. First find the OPTION or OPTION2 control, and then use keys 0..7 on the remote keypad
to control bits 0 to 7 respectively. The table below shows the two option bytes available;
OPTION1
B7 B6 B5 B4 B3 B2 B1 B0
1TOP text
off FASTEXT FLOF off TUBE 4:3 AUTO 4:3
switch to
PANORAMA
SVHS3
disable
0TOP text
on FASTEXT (FLOF) on TUBE 16:9 AUTO 4:3 switch to 4:3
XSVHS3
enable
Tuner options
00 = Philips
01 = ALPS
10 = Philips(AGC
intern)
11 = Daewoo
OPTION2
B7 B6 B5 B4 B3 B2 B1 B0
1Normal I
brightness
0YYYYNormal I brightness
+5 steps
See table below.
OPTION2 bits B2 B1 B0
OPTION2 bits B2 B1 B0
Beam Current (mA)
B2 B1 B0 Nominal Max Tube
1110.95 1.10 28” 4:3 Normal (Philips, Thomson)
28” 16:9 Super Flat (Philips, Thomson)
1101.00 1.15
1011.05 1.20 28” 4:3 Normal (Tesla)
1001.10 1.25
0111.20 1.44 28” 16:9 Real Flat (Thomson)
29” 4:3 Real Flat (Thomson)
0101.25 1.49
0011.30 1.53
0000.90 1.05 21” 4:3 Real Flat (Philips)
Set all the unused bits, marked ‘X’, to be 0 for future compatibility.
Set all the unused bits, marked ‘Y’, to be 1 for future compatibility.
Service manual WP 895/895F, CP885/885F, CP485F
- 15 -

Entering Factory mode Option bits
To switch the TV set into FACTORY mode, use the factory remote control, and press on “SVC”. The factory menu
will appear on the screen, showing “FACTORY Vx.xxX” (where x.xx is the software version) and X is the project. A is
the correct project for WP895/895F, CP-485/885F, and B is for the CP885 chassis.
To find the option bits, push the button “OPT” once. Then “00000000 OPTION” will appear (assuming that all bits are
already zero) to indicate all 8 option bits. To find OPTION2 press the button “OPT” a second time. From left to right,
bits 7 to 0 are shown.
Toggling option bits
This is done from the user remote control, as there are no unallocated keys available from the factory remote control.
Each bit, from bit 7 to bit 0 is represented by its own key. Each key will, with repeated use, toggle on/off the
associated bit. See the table below for the keys to use.
After setting option bits
Before pushing on the shipping key, “AGC”, it is necessary to push the “NORMAL” key to obtain NORMAL I. This will
reset all the sound and brightness settings to a factory defined level, as well as some other settings such as sound
PRESET and WAKE TIME/PROG.
Then, on pushing the shipping key, these levels are memo rised in the television, ready for packing and delivery.
Verification
On pushing the shipping “AGC” key, a four digit hexadecimal number is displayed in addition to “SHIPPING”. This
number is there to verify the option bits setting that has been entered. For example the binary code 0000 0111
(OPTION2) 1100 0010 (OPTION) will give 07 C2 hex. The order of display is therefore OPTION2 then OPTION
when reading from left to right.
BitB7B6B5B4B3B2B1B0
User
remote
control key
Text
HOLD
Text
SubPage Mode
Text
Reveal
Text
DoubleHeightRedGreenYellowBlue
- 16-
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.
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.
Service manual WP 895/895F, CP885/885F, CP485F

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,
Service manual WP 895/895F, CP885/885F, CP485F
- 17 -
For HOR WIDTH, adjust for 91% overscan.

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Service manual WP 895/895F, CP885/885F, CP485F
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.

- 19 -
Service manual WP 895/895F, CP885/885F, CP485F
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