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Service Manual
Colour Television
CHASSIS WP-895 WP-895F CP-885 CP-885F CP-485F
S/M No. : TWP895BEF0R2
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).
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr Jun. 2002
Service manual WP-895/895F. CP885/885F. CP485F
Contents
1 - Main features ........................................................................................................................................................ 4 1-1 Specifications .................................................................................................................................................. 4 1-2 Channel table .................................................................................................................................................. 8 1-3 ATSS sorting method ....................................................................................................................................... 11 2 - Safety instruction ................................................................................................................................................. 13 3 - Alignment instructions ........................................................................................................................................ 3-1 Microcontroller configuration : Service mode ................................................................................................... 3-2 Service mode navigation ................................................................................................................................. 3-3 Microcontroller configuration : Option .............................................................................................................. 3-4 TV set Alignment ............................................................................................................................................. 3-4-1 Local oscillator alignment .................................................................................................................... 3-4-2 G2 alignment ....................................................................................................................................... 3-4-3 White balance ..................................................................................................................................... 3-4-4 Focus .................................................................................................................................................. 3-4-5 Vertical geometry ................................................................................................................................ 3-4-6 Horizontal picture centring ................................................................................................................... 3-4-7 East/West correction ........................................................................................................................... 3-4-8 AGC .................................................................................................................................................... 4 - IC description ....................................................................................................................................................... 4-1 VCT383xA TV signal processor - Teletext decoder with embedded 8 bit Controller ............................................................................................................................................................ 4-1-1 Block diagram off the VCT ................................................................................................................... 4-1-2 TV-signal Processor ........................................................................................................................... 4-1-2 -Controller ....................................................................................................... ................................... 4-1-4 Teletext Features ................................................................................................................................ 4-1-5 Displaty OSD Features ...................................................................................................................... 4-1-6 Audio Features ................................................................................................................................... 4-1-7 General Features ............................................................................................................................... 4-1-8 Data Capture ....................................................................................................................................... 4-1-9 Data Capture Features ........................................................................................................................ 4-1-10 TV processor version and -Controller capacity .............................................................................. 4-1-11 IC marking and version ....................................................................................................................... 4-1-12 Pinning ................................................................................................................................................ 4-2 MSP341x Multistandard Sound Processor ................................................................................................... 4-2-1 Basic Features of the MSP 341x ......................................................................................................... 4-3 TDA4470 - Multistandard Video-IF and Quasi Parallel Sound Processor ...................................................... 4-3-1 Description .......................................................................................................................................... 4-3-2 Features .............................................................................................................................................. 4-3-3 Pinning ................................................................................................................................................ 4-3-4 Block diagram .................................................................................................................................... 4-4 TDA894xJ Stereo Audio Amplifier ................................................................................................................. 4-4-1 Features ............................................................................................................................................... 4-5 TDA835xJ Vertical Amplifier ........................................................................................................................... 4-5-1 TDA8357J ........................................................................................................................................... 14 14 14 15 16 16 16 16 16 16 16 16 18 19 19 19 19 20 20 21 21 21 21 21 22 22 22 25 25 29 29 29 29 30 31 31 33 33
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Service ma n WP-895/895F. CP885/885F. CP485F ual
4-5-2 TDA8358J .............................................................................................................................................. 34 4-6 TDA6107Q .......................................................................................................................................................... 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 Block diagram ....................................................................................................................................... 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 Block diagram ....................................................................................................................................... 43 5-2-2 Vision IF Amplifier .................................................................................................................................. 43 5-2-3 Tuner-and VIF-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 5-2-10 Internal Voltage Stabiliser ..................................................................................................................... 45 5-3 Video - 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 5-3-10 Horizontal Scaler ................................................................................................................................... 47 5-3-11 Video Sync Processing ........................................................................................................................ 48 5-3-12 Display Processing ................................................................................................................................ 48 5-3-13 Chroma Transient Improvement ............................................................................................................ 48 5-3-14 Video Back-end ..................................................................................................................................... 48 5-3-15 CRT Measurement and Control ........................................................................................................... 49 5-3-16 Average Beam Current Limiter ............................................................................................................. 49 5-3-17 Analogue RGB Insertion ...................................................................................................................... 49 5-3-18 Fast-Blank Monitor ................................................................................................................................ 49 5-3-19 Vertical and East/West Deflection ....................................................................................................... 50 5-3-20 EHT Compensation ................................................................................................................................ 50 5-3-21 Reset Function ...................................................................................................................................... 50 5-3-22 Standby and Power-On ........................................................................................................................ 50 5-4 Micro-controller ............................................................................................................... .......................................... 50
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Service manual WP-895/895F. CP885/885F. CP485F
5-4-1 Introduction........................................................................................................................................... 50 5-4-2 CPU ...................................................................................................................................................... 50 5-4-3 -Controller I/O pin configuration and function ............................................................................... 51 5-4-4 Tuning .................................................................................................................................................. 51 5-4-5 Automatic Format switching and WSS ............................................................................................... 51 5-4-6 EXTERNAL source control logic ........................................................................................................... 52 5-4-7 Over Current Protection ........................................................................................................................ 54 5-5Telete Displa ................................................................................................................................................. 54 xt y 5-6 Sound processing ............................................................................................................................................... 55 5-6-1 Analogue sound IF-input section ............................................................................................................ 55 5-6-2 Quadr ture Mix ................................................................................................................................ 55 a ers 5-6-3 Phase and AM discr imination........................................................................................................... 55 5-6-4 NICAM decoder................................................................................................................................... 56 . 5-6-5 DSP section .......................................................................................................................................... 56 5-6-6 Sound Mode switching .......................................................................................................................... 56 5-7 Sound amplification ........................................................................................................................................... 56 5-7-1 Power amplifier..................................................................................................................................... 56 5-7-2 Mode selection ....................................................................................................................................... 57 5-8 Vertical deflection............................................................................................................................................. 57 5-8-1 Flybac voltage..................................................................................................................................... 57 k 5-8-2 Protection.............................................................................................................................................. 57 5-8-3 Guard circuit.......................................................................................................................................... 57 5-8-4 Damping resistor.................................................................................................................................. 57 . 5-8-5 EAST -WEST Amplifier (TD A8358J only) .............................................................................................. 57 . 5-9 P ower supply (STR F6653) .............................................................................................................................. 58 .. 5-9-1 STR-F6654 gener descrption......................................................................................................... 58 aral i 5-9-2 Power supply primary par t operations ................................................................................................... 58 5-10TV start-up, TV normal run and stand by mode operations ............................................................................... 62 5-10-1 TV start-up operations......................................................................................................................... 62 . 5-10-2 TV normal run and stand-by mode operations ....................................................................................... 63 6 - Service parts list................................................................................................................................................... 68 7 - Exploded View ........................................................................................................................................................ 86 7-1 DWX-28W5 ....................................................................................................................................................... 86 7-2 DWF-28W8 ....................................................................................................................................................... 87 7-3 D T F-29U8 ....................................................................................................................................................... 88 7-4 D T P-28A7 ....................................................................................................................................................... 89 7-5 D T P-28B1 ....................................................................................................................................................... 90 7-6 D T P-28G7 ....................................................................................................................................................... 91 7-7 D T P-28G8 ....................................................................................................................................................... 92 7-8 DWF-28W9 ....................................................................................................................................................... 93
7-9 DTB-21U7
................................................................................................................................................... 94
8 - PCB Layout 9 - Circuit Diagram
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Service manual WP 895/895F, CP885/885F, CP485F
1- Main Features 1-1 Specifications TV standard Sound system Power consumption PAL - SECAM B/G D/K, PAL I/I, SECAM L/L' NICAM B/G, I, D/K, L, FM 2Carrier B/G, D/K 21" Real Falt : 59 W approx. 28" 4:3, FST : 69 W approx. 29" 4:3, REAL FALT : 74 W approx. 28" 16:9, WIDE : 69 W approx. 21" : 4.5W x 2 (at 1kHz, 60% mod, 10%THD) 28", 29" : 7W x 2 (at 1kHz, 60% mod, 10%THD) 21" : 7W 8 ohm x2 28", 29" : 12W 8 ohm x2 10 pages memory FASTEXT (FLOF or TOP) 75 ohm unbalanced Off-air channels, S-cable channels and hyperband frequency synthesiser tuning system 21" : 51 cm 28" : 66 cm 29" : 68 cm On Screen Display 100 programmes 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. Monitor Out(option) 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. R-46G22
Sound Output Power Speaker Teletext system Aerial input Channel coverage Tuning system Visual screen
Channel indication Program Selection Aux. terminal
Remote Control Unit
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Service manual WP 895/895F, CP885/885F, CP485F
Specification matrix
CHASSIS NAME VCT VERSION SOFTWARE VERSION REMOTE CONTROL PCB SERIAL NUMBER TUBE SVHS3 "PICTURE IMPROVEMENTS, COMB FILTER, HORIZONTAL SCALER" TELETEXT SPLIT SCREEN FORMATS AVAILABLE IN VIDEO MODE AV2 MONITOR OUTPUT MSP VERSION (OPTION) SOUND EFFECTS 3410 OFF / SPATIAL 3411 OFF / SPATIAL / PANORAMA / VIRTUAL DOLBY DEDICATED 3410 OFF / SPATIAL 3411 OFF / SPATIAL / PANORAMA / VIRTUAL DOLBY DEDICATED 3410 OFF / SPATIAL 3415 OFF / SPATIAL 3410 OFF / SPATIAL 3411 OFF / SPATIAL / PANORAMA / VIRTUAL DOLBY DEDICATED 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 WP-895 / CP-485F 3834 A R46G22 4859805093 16:09 WP-895F 3834 A R46G22 4859805193 16:9 REAL FLAT CP885 3832 B R46G22 4859805093 4:03 CP885F 3834 A R46G22 4859805193 4:3 REAL FLAT
GRAPHIC EQUALIZER AV3 AUDIO INPUT TELETEXT PAGE MEMORY TOP TELETEXT FLOF TELETEXT TEXT CHARACTER SUPPORT OSD LANGUAGES TUNER OPTIONS DEDICATED DEDICATED DEDICATED AV2 COMMON DEDICATED 10 PAGE 10 PAGE 10 PAGE 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, Hungarian, Czech, Slovakian, Romanian, Russian." "Philips, Alps, Partsnic"
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Service manual WP 895/895F, CP885/885F, CP485F
21 Pin EURO-SCART 1 : Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Signal Description Audio Output Right Audio Input Right Audio Output Left Audio Earth Blue Earth Audio Input Left Blue Input Slow Switching Green Earth N.C. Green Input N.C. Red Earth Blanking Earth Red Input Fast Switching Video Out Earth Video In Earth Video Output Video Input Common Earth Matching value 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) 0.5 Vrms, Impedance > 10 0.5 Vrms, Impedance < 1 , ( RF 54% Mod )
0.5 Vrms, Impedance > 10 0.7 Vpp ±0.1V, Impedance 75 TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , Impedance > 10
0.7 Vpp
0.1V, Impedance 75
0.7 Vpp 0.1V, Impedance 75 0 to 0.4V : Logic "0", 1 to 3V : Logic "1", Impedance 75
1 Vpp 3dB, Impedance 75 1 Vpp 3dB, Impedance 75
21 Pin EURO-SCART 2 : Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Signal Description Audio Output Right Audio Input Right Audio Output Left Audio Earth Earth Audio Input Left N.C. Slow Switching N.C. N.C. N.C. N.C. Earth Earth Chroma Input N.C. Earth Video In Earth Matching value 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) - Not available for cp885 0.5 Vrms, Impedance > 10 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) - Not available for cp885
0.5 Vrms, Impedance > 10 TV: 0 to 2V, AV 16:9: 4.5V to 7V, AV 4:3: 9.5 to 12V
3dB for a luminance signal of 1 Vpp
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Service manual WP 895/895F, CP885/885F, CP485F
19 20 21 Video Output Video Input, Y In. Common Earth 1 Vpp 3dB, Impedance 75 ( Monitor output ) - Not available for cp885 1 Vpp 3dB, Impedance 75
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Service manual WP 895/895F, CP885/885F, CP485F
1-2 Channel table FREQUENCY TABLE CH C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 EUROPE CCIR 46.25 48.25 55.25 62.25 175.25 182.25 189.25 196.25 203.25 210.25 217.25 224.25 53.75 82.25 183.75 192.25 201.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 FRANCE 55.75 (L') 60.5 (L') 63.75 (L') 176.00 184.00 192.00 200.00 208.00 216.00 189.25 (LUX) 69.25 (L') 76.25 (L') 83.25 (L') 90.25 97.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 GB(IRELAND) 47.75 53.75 61.75 175.25 183.25 191.25 199.25 207.25 215.25 223.25 231.25 239.25 247.25 49.75 57.75 65.75 77.75 85.75 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25 EAST OIRT 49.75 59.25 77.25 85.25 93.25 175.25 183.25 191.25 199.25 207.25 215.25 223.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 535.25 543.25 551.25 559.25 567.25 575.25 583.25 591.25 599.25 607.25 615.25 623.25 631.25
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Service manual WP 895/895F, CP885/885F, CP485F
CH C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 S01 S02 S03 S04 S05 S06 S07 S08 S09 EUROPE CCIR 639.25 647.25 655.25 663.25 671.25 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 69.25 76.25 83.25 90.25 97.25 59.25 93.25 105.25 112.25 119.25 126.25 133.25 140.25 147.25 154.25 161.25 FRANCE 639.25 647.25 655.25 663.25 671.25 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 104.75 116.75 128.75 140.75 152.75 164.75 176.75 188.75 200.75 GB(IRELAND) 639.25 647.25 655.25 663.25 671.25 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 103.25 111.25 119.25 127.25 135.25 143.25 151.25 159.25 167.25 EAST OIRT 639.25 647.25 655.25 663.25 671.25 679.25 687.25 695.25 703.25 711.25 719.25 727.25 735.25 743.25 751.25 759.25 767.25 775.25 783.25 791.25 799.25 807.25 815.25 823.25 831.25 839.25 847.25 855.25 863.25 105.25 112.25 119.25 126.25 133.25 140.25 147.25 154.25 161.25
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Service manual WP 895/895F, CP885/885F, CP485F
CH S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 S41 EUROPE CCIR 168.25 231.25 238.25 245.25 252.25 259.25 266.25 273.25 280.25 287.25 294.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25 FRANCE 212.75 224.75 236.75 248.75 260.75 272.75 284.75 296.75 136.00 160.00 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25 GB(IRELAND) 255.25 263.25 271.25 279.25 287.25 295.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25 EAST OIRT 168.25 231.25 238.25 245.25 252.25 259.25 266.25 273.25 280.25 287.25 294.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25
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Service manual WP 895/895F, CP885/885F, CP485F
1-3 A TSS sorting method The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling softw for each are program checks if a VPS CNI code is transmitted ( this system e xists for German, Swiss and Austrian transmissions). If no VPS 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 the A TSS list, the program is automatically named. If the transmission does not have VPS CNI, and no teletext service is availab le, 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 softw Within this are. group the sorting order is fixed by the A TSS 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 ... n n+1 ... m m+1 ... p p+1 ... q q+1 .... 99 0
Group Group I
Skip
Group II
Group III
Group IV
Program number 1 ... m m+1 ... p p+1 ... q q+1 .... 99 0
Group Group II
Skip
Group III
Group IV
not used
not used
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 pro gram SW3 in Germany ).
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Service manual WP 895/895F, CP885/885F, CP485F
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. Special case : France If France is selected, the TV controlling softw are f irst swe e ps all TV bands with Fr ance system selected ( positi ve video modulation) and the a second time with Europe system selected ( nega tive video modulation). Special case : Switzerland If Switzerland is selected the TV controlling softw are f irst s wee ps all TV bands with Eur ope system selected (ne ga tive 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 f ollowing 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, ...
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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 curr ent. 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 under AC 220 ~ 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 con figuration : 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 men u press men u key or Std By key. 3-2 Service mode navigation Pr Up / D own remote keys Vol- / + remote keys 0~7 digit keys Order 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
: cycle through the service items availa ble. : Decrement / Increment the values within range. : Toggle bits 0~7 in option byte Default settingh for wp 895 +140 -1100 -80 -1 -2 -12 -15 +100 +145 +3939 +92 +87 +95 +128 +128 98 Not used
Item PARABOLA HOR WIDTH CORNER HOR.PARAL V.LINEAR EW TRAPEZ S CORRECT H BOW VERT SIZE VERT CENT RED GAIN GRN GAIN BLUE GAIN RED BIAS GRN BIAS HOR CEN AGC LEVEL G2-SCREEN AFT OPTION MAXV OL
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Service manual WP 895/895F, CP885/885F, CP485F
3-3 Microcontroller configuration : Option bits
MICOM VCT3834A C4 DWO2 VCT3832A C4 DW03 Bits in OPTION NOT USED USED (set to `0') 7, 6, 5, 2, 1, 4, 3 0 Bits in OPTION2 NOT USED USED (set to `0') OPTION2 does not exist COMMENTS Up to, but not including COB version 0.14 No tuner option 11 (ROM V1.00 A/B) From V0.17 COB (ROM V2.00 A/B)
DW3834A-C4-AE2 DW3832A-C4-BE2
7, 6, 5, 4, 2, 1, 0
3
3, 2, 1, 0
7, 6, 5, 4
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;
B7 1 TOP text off TOP text on B6 FASTEXT FLOF off FASTEXT (FLOF) on B5 TUBE 4:3 TUBE 16:9 OPTION1 B4 AUTO 4:3 switch to PANORAMA AUTO 4:3 switch to 4:3 OPTION2 B4 B3 Normal I brightness Normal I brightness +5 steps B3 B2 SVHS3 disable X SVHS3 enable B1 B0 Tuner options 00 = Philips 01 = ALPS 10 = Philips(AGC intern) 11 = Daewoo
0
B7 1 Y 0
B6
B5
B2
B1
B0
Y
Y
Y
See table below. OPTION2 bits B2 B1 B0
B2 1 1 1 1 0 0 0 0
B1 1 1 0 0 1 1 0 0
B0 1 0 1 0 1 0 1 0
OPTION2 bits B2 B1 B0 Beam Current (mA) Nominal Max 0.95 1.00 1.05 1.10 1.20 1.25 1.30 0.90 1.10 1.15 1.20 1.25 1.44 1.49 1.53 1.05
Tube 28" 4:3 Normal (Philips, Thomson) 28" 16:9 Super Flat (Philips, Th omson)
28" 4:3 Normal (Tesla)
28" 16:9 Real Flat (Thomson) 29" 4:3 Real Flat (Thomson)
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.
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Service manual WP 895/895F, CP885/885F, CP485F
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.
Bit User remote control key
B7 Text HOLD
B6 Text SubPage Mode
B5 Text Reveal
B4 Text Double Height
B3 Red
B2 Green
B1 Yellow
B0 Blue
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.
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.
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Service manual WP 895/895F, CP885/885F, CP485F
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,
HOR PARAL
H BOW
HOR WIDTH
For HOR WIDTH, adjust for 91% overscan.
PARAROLA
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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.
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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 · Analogue YC r C b input · Composite video monitor · Multistandard colour decoder ( 1 crystal ) · Multistandard sync decoder · Black-line detector · Adaptive 2H comb filter Y/C separator
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Service manual WP 895/895F, CP885/885F, CP485F
· 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 · Adaptive data slicer · Signal quality detection · WST, PDC, VPS, and WSS acquisition
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Service manual WP 895/895F, CP885/885F, CP485F
· High-level command language · FLOF (Fastext), and TOP support · 10 pages memory on chip (10kB) 4-1-5- Display OSD Features · 3kB OSD RAM on chip · WST level 1.5 compliant · WST level 2 parallel attributes · 32 foreground/background colours · programmable colour look-up table · 1024 mask programmable characters · 17 national languages · (Latin, Cyrillic and Greek caracter sets) · Character matrix 10x10 · 4-color mode for user font 4-1-6- Audio Features · Three mono inputs · Two mono outputs · Programmable channel select · Volume control for one mono channel 4-1-7- General Features · Submicron CMOS technology · Low-power standby mode · Single 20.25 MHz crystal · 64-pin PSDIP package 4-1-8- Data Capture The Video Front End section takes in the analogue Composite Video and Blanking Signal (CVBS), and from this extracts the required data, which is then decoded and stored in memory. The extraction of the data is performed in the digital domain. The first stage is to select and convert the analogue CVBS signal into a digital form. This is done using 8 bit ADC sampling at 20.25 Mhz. The digital data services transmitted in the VBI are selected and acquired separately form the video part. This is done by the use of an adaptive data slicer. The following data types can be extracted : 625 line World System Teletext (WST), VPS, WSS. The data is acquired and decoded by the teletext decoder (TPU), then stored in an SRAM lnterface. 4-1-9- Data Capture Features · Video Signal Quality detector · Data Capture for 625 line WST · Data Capture for VPS data (PDC system A) · Data Capture for Wide Screen Signalling (WSS) bit decoding · Real-time capture and decoding for WST Teletext in Hardware, to enable optimised microprocessor throughput · 10 page memory stored On-Chip
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Service manual WP 895/895F, CP885/885F, CP485F
· Inventory of transmitted Teletext pages stored in the Page Table · Signal quality detector for WST data · Comprehensive Teletext language coverage · Full Field Vertical Blanking Interval (VBI) data capture of WST data 4-1-10- TV processor version and -Controller capacity IC version 8 bit -controller ROM size RAM size PAL decoder SECAM decoder NTSC decoder Picture improvement Teletext page memory Adaptive Comb filter Panorama Scaler 4-1-11- IC marking and version Chassis CP885 CP885F
WP895F/CP485F WP895
VCT 3832A 96k 1k
VCT 3834A 96k 1k
10 pages X
10 pages
IC marking VCT3832A VCT3834A VCT3834A VCT3834A
OSD languages English, French, German, Italian, Spanish, Dutch, Danish, Finnish, Norwegian, Swedish, Greek, Polish, Hungarian, Czech, Slovakian, Romanian, Russian.
ATSS countries GB, France, Germany, Italy, Belgium, Spain, Austria, Poland, Switzerland, Denmark, Finland, Netherlands, Norway, Sweden, Ireland, Hungary, Czech Republic, Others
Text
Pan-European Latin. Cyrillic, Greek.
4-1-12- Pinning
PSDIP 64-pin 1 2 3 4 5 6 7 8 9 10 11 12 13
Pin Name
Power AGC VSUPP1 GNDP1 MOD_SW SECAM L/L' AFC IR SC1.SW SC2.SW VOUT VRT SGND
Type
OUT IN SUPPLY SUPPLY OUT OUT IN IN IN IN OUT IN IN
Short Description
High = SMPS ON, Low = SMPS in stand by mode. For service only, tuner AGC, TOP alignment. Supply Voltage, Port ( pin 1, 2, 5, 6, 7, 8, 9, 10, 61, 62, 63, 64). Ground, Port. High = Negative modulation, Low = Positive modulation (L/L'). High = L', Low = L.
Analog Video Output Reference Voltage Top, Video ADC Signal Ground for Analog Input
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Service manual WP 895/895F, CP885/885F, CP485F
PSDIP 64-pin 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
Pin Name
GNDAF VSUPAF CBIN CIN1 CIN2/CRIN VIN1 VIN2 VIN3 VIN4 TEST HOUT VSUPD GNDD FBLIN RIN GIN BIN VPROT SAFETY HFLB VERTQ/ INTLC VERT EW SENSE GNDM RSW1 RSW2 SVMOUT ROUT GOUT BOUT VSUPAB GNDAB VRD XREF AIN3 AIN2 AIN1 AOUT2 AOUT1 VSUPS GNDS XTAL1 XTAL2 RESQ SCL SDA Mute LED KB OCP
Type
SUPPLY SUPPLY IN IN IN IN IN IN IN IN OUT SUPPLY SUPPLY IN IN IN IN IN IN IN OUT OUT OUT IN SUPPLY OUT OUT OUT OUT OUT OUT SUPPLY SUPPLY IN IN IN IN IN OUT OUT SUPPLY SUPPLY IN OUT IN/OUT IN/OUT IN/OUT OUT OUT IN IN
Short Description
Ground, Analog Front-end Supply Voltage, Analog Front-end Analog Component Cb Input Analog Chroma 1 Input Analog Chroma 2 Input / Analog Component Cr Input Analog Video 1 Input Analog Video 2 Input Analog Video 3 Input Analog Video 4 Input Test Pin, Reserved For Test Horizontal Drive Output Supply Voltage, Digital Circuitry Ground, Digital Circuitry Fast Blank Input Analog Red Input Analog Green Input Analog Blue Input Vertical Protection Input Safety Input Horizontal Flyback Input Differential Vertical Sawtooth Output Interlace Control Output Differential Vertical Sawtooth Output Vertical Parabola Output Sense ADC Input Ground, MADC Input Range Switch1 for Measurement ADC Range Switch2 for Measurement ADC Scan Velocity Modulation Output Analog Red Output Analog Green Output Analog Blue Output Supply Voltage, Analog Back-end Ground, Analog Back-end DAC Reference Reference Input for RGB DACs Analog Audio 3 Input Analog Audio 2 Input Analog Audio 1 Input Analog Audio 2 Output Analog Audio 1 Output Supply Voltage, Standby Ground, Standby Analog Crystal Input Analog Crystal Output Reset Input/Output, Active Low I 2 C Bus Clock I 2 C Bus Data High = Mute active High = Green, Low = Red Local keyboard ADC input Over Current Protection input - 23 -
Service manual WP 895/895F, CP885/885F, CP485F
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Power AGC S/B 5V Gnd MOD SW SECAM L' AFC/RES IR SC1 SW SC2 SW Vout VRT SGND GND 5V Cb in C in Cr in IF-IN SC1-IN SC2-IN RCA VIN TEST H out 3.3 V GND FBLIN Rin Gin Bin VPROT SAFETY
64 63 62 61 60 59 58 57 56 55 54 53 52 51
OCP KB LED MUTE SDA SCL RESET XTAL in OSC GND GND S/B 3.3V
GND GND GND XREF VRD GND 5V B out G out R out SVM out RSW2 RSW1 GND SENSE EW VERTQ VERT HFLB
VCT 383X
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
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Service manual WP 895/895F, CP885/885F, CP485F
4-2 MSP341x Multistandard Sound Processor The MSP 341x is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards. The MSP3411 has all functions of MSP3410 with the addition of a virtual surround sound feature. A Surround sound affect c be rproduced with two loudspeakers. The MSP3411 includes virtualizer can algorithm "3D Panorama" which has been approved by the Dolby laboratories for compliance with the "Virtual Dolby Surround" technology. In addition, the MSP3411 includes Micronas "Panorama" algorithm. MSP 341x features : - sound IF input - No external filters required - Stereo baseband input via integrated AD converters - Two pairs of DA converters - Two carrier FM or NICAM processing - AVC : Automatic Volume Correction - Bass, treble, volume processing - Full SCART in/out matrix without restrictions - Improved FM-identification - Demodulator short programming - Autodetection for terrestrial TV - sound standards - Precise bit-error rate indication - Automatic switching from NICAM to FM/AM or vice versa - Improved NICAM synchronisation algorithm - Improved carrier mute algorithm - Improved AM-demodulation - Reduction of necessary controlling - Less external components 4-2-1- Basic Features of the MSP 341x 4-2-1-1 Demodulator and NICAM Decoder Section The MSP 341x is designed to simultaneously perform digital demodulation and decoding of NICAM-coded TV stereo sound, as well as demodulation of FM or AM mono TV sound. Alternatively, two carrier FM systems according to the German terrestrial specs can be processed with the MSP 341x. The MSP 341x facilitates profitable multistandard capability, offering the following advantages: - Automatic Gain Control (AGC) for analogue input: input range: 0.10 - 3 Vpp - integrated A/D converter for sound-IF input - all demodulation and filtering is performed on chip and is individually programmable - easy realisation of all digital NICAM standards (B/G, I, L and D/K) - FM-demodulation of all terrestrial standards (include identification decoding) - no external filter hardware is required - only one crystal clock (18.432 MHz) is necessary
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Service manual WP 895/895F, CP885/885F, CP485F
- high deviation FM-mono mode (max. deviation: approx. ±360 kHz) 4-2-1-2 DSP-Section (Audio Baseband Processing) - flexible selection of audio sources to be processed - performance of terrestrial de-emphasise systems (FM, NICAM) - digitally performed FM-identification decoding and de-matrixing - digital baseband processing: volume, bass, treble - simple controlling of volume, bass, treble 4-2-1-3 Analogue Section - two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25 - one selectable analogue mono input (i.e. AM sound): Not used in this chassis - two high-quality A/D converters, S/N-Ratio: >85 dB - 20 Hz to 20 kHz bandwidth for SCART-to-SCART copy facilities - loudspeaker: one pair of four-fold oversampled D/A converters. Output level per channel: max. 1.4 VRMS output resistance: max. 5 . S/N-ratio: >85 dB at maximum volume Max. noise voltage in mute mode: < 10 V (BW: 20 Hz... 16kHz) - one pair of four-fold oversampled D/A converters supplying a pair of SCART-outputs. output level per channel: max. 2 V RMS, output resistance: max. 0.5 , S/N-Ratio: >85 dB (20 Hz... 16 kHz) 4-2-1-4 NICAM plus FM/AM-Mono According to the British, Scandinavian, Spanish, and French TV-standards, high-quality stereo sound is transmitted digitally. The systems allow two high-quality digital sound channels to be added to the already existing FM/AM-channel. The sound coding follows the format of the so-called Near Instantaneous Companding System (NICAM 728). Transmission is performed using Differential Quadrature Phase Shift Keying (DQPSK. Table below offers an overview of the modulation parameters.) In the case of NICAM/FM (AM) mode, there are three different audio channels available: NICAM A, NICAM B, and FM/AM-mono. NICAM A and B may belong either to a stereo or to a dual language transmission. Information about operation mode and about the quality of the NICAM signal can be read by the controlling software via the control bus. In the case of low quality (high bit error rate), the controlling software may decide to switch to the analogue FM/AMmono sound. Alternatively, an automatic NICAM-FM/AM switching may be applied. 4-2-1-5 German 2-Carrier System (DUAL FM System) Since September 1981, stereo and dual sound programs have been transmitted in Germany using the 2-carrier system. Sound transmission consists of the already existing first sound carrier and a second sound carrier additionally containing an identification signal. More details of this standard are given in Tables below. For D/K very similar system is used.
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Service manual WP 895/895F, CP885/885F, CP485F
TV standards TV system B/G B/G L I D/K Position of sound carrier (MHz) 5.5 / 5.7421875 5.5 / 5.85 6.5 / 5.85 6.0 / 6.552 6.5 / 6.2578125 D/K1 6.5 / 6.7421875 D/K2 6.5 / 5.85 D/K-NICAM Sound modulation FM Stereo FM-Mono / NICAM AM-Mono / NICAM FM-Mono / NICAM FM Stereo FM-Mono / NICAM Color system PAL PAL SECAM-L PAL SECAM-East Country Germany Scandinavia, Spain France UK USSR Hungary
Architecture of MSP341x
Pin connections and short description Pin No. Pin Name Type 1 TP Out 2 NC 3 NC 4 TP Out 5 TP Out 6 ADR_SEL In 7 STANDBYQ In 8 NC 9 I2C_CL In / Out 10 I2C_DA In / Out 11 TP In / Out
Short description Test pin Not Connected Not Connected Test pin Test pin I2C bus Address select Standby ( Low-active) Not Connected I2C Clock I2C data Test pin
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Service manual WP 895/895F, CP885/885F, CP485F
Pin No. 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Pin Name TP TP NC TP TP TP DVSUP DVSS NC NC NC NC RESETQ NC NC VREF2 DACM_R DACM_L NC TP NC NC NC VREF1 SC1_OUT_R SC1_OUT_L NC AHVSUP CAPL_M AHVSS AGNDC NC NC NC NC NC ASG2 SC2_IN_L SC2_IN_R ASG1 SC1_IN_L SC1_IN_R VREFTOP MONO_IN AVSS AVSUP ANA_IN1+ Type In / Out Out Out Out Out Short description Test pin Test pin Not Connected Test pin Test pin Test pin Digital power supply +5V Digital Ground Not Connected Not Connected Not Connected Not Connected Power-On-reset Not Connected Not Connected Reference ground 2 high voltage part Loudspeaker out Right Loudspeaker out Left Not Connected Test pin Not Connected Not Connected Not Connected Reference ground 1 high voltage part Scart output 1, right Scart output 1, left Not Connected Analog power supply 8.0V Volume capacitor MAIN Analog ground Analog reference voltage high voltage part Not Connected Not Connected Not Connected Not Connected Not Connected Analog Shield Ground 2 Scart input 2 in, left Scart input 2 in, right Analog Shield Ground 1 Scart input 1 in, left Scart input 1 in, right Reference voltage IF A/D converter Mono input Analog ground Analog power supply In IF input 1
In
Out Out Out
Out Out
In In In In In
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Service manual WP 895/895F, CP885/885F, CP485F
Pin No. 59 60 61 62 63 64 Pin Name ANA_IN1NC TESTEN XTAL_IN XTAL_OUT NC Type In In In Out Short description IF common Not Connected Test pin Crystal oscillator Crystal oscillator Test pin
4-3 TDA 4470-Multistandard Video-IF and Quasi Parallel Sound Processor 4-3-1- Description The TDA 4470 is an integrated bipolar circuit for multi-standard video/sound IF (VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals. 4-3-2- Features - 5V supply voltage ; low power consumption. - Active carrier generation by FPLL principle (frequency-phase-locked-loop) for true synchronous demodulation. - Very linear video demodulation, good pulse response and excellent intermodulation figures. - Alignment-free AFC without external reference circuit, polarity of the AFC curve is switchable. - VIF-AGC for negative modulated signals (peak sync. detection) and for positive modulation (peak white/black level detector). - Tuner AGC with adjustable take over point. - Alignment-free quasi parallel sound (QPS) mixer for FM/NICAM sound IF signals. - Intercarrier output signal is gain controlled (necessary for digital sound processing). - Complete alignment-free AM demodulator with gain controlled AF output. - Separate SIF-AGC with average detection - Two independent SIF inputs - Parallel operation of the AM demodulator and QPS mixer (for NICAM-L stereo sound). 4-3-3- Pinning Pin 1,2 3 4,9,16 5 6,7 8 10 11 12 13 14 15 17 18 Symbol Vi,SIF1 VSW GND VAGC Vi,VIF CAGC RTOP Itun VO,VID VSW VSW Cbl Cref LF Function SIF1 input ( symmetrical) Input selector switch Ground SIF-AGC (time constant) VIF input (symmetrical) VIF-AGC (time constant) Take Over Point, tuner AGC Tuner AGC output current Video output Standard switch L'switch Black level capacitor Internal reference voltage Loop Filter
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Service manual WP 895/895F, CP885/885F, CP485F
Pin 19 20, 21 22 23 24 25 26 27, 28 Symbol VSW VVCO VAFC VS VO, FM VO, AM RCOMP Vi,SIF2 Function AFC switch VCO circuit AFC output Supply voltage Intercarrier output AF output-AM sound Offset compensation SIF2 input (symmetrical)
4-3-4 Block diagram
Offset comp. (optional)
Loop filter
l' switch VCO
26
18
20
21
14
FPLL
VCO + phase shift
Control 19 AFC 22
AFC switch AFC
6 VIF CAGC 7
VIF amp Video Video det.
8 AGC (VIF) 13 Standard
15 CBL Tuner 11 10 Take over point SIF 2 SIF input switch
Standard switch
23 Tuner AGC FM det. Supply 17 Cref 24
V
27 28 SIF amp 3
Intercarrier (FM/NICAM)
1 SIF 1 2 AGC (SIF) AM det. 25 AF (AM)
5 CAGC
4,9,16
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Service manual WP 895/895F, CP885/885F, CP485F
4-4 TDA894xJ Stereo Audio Amplif er i The TDA8944J( TDA 8946J) is a dual-channel audio po wer amplifier with an output power of 2 x 7W (2 X 15W) at an 8 load and a 12V supply. The circuit contains two Bridges Tied Load(BTL) amplif ers with an all-NPN output i stage and standby/mute logic. The TDA8944J comes in a 17-pin DIL power package. 4-4-1- Features - Few external components - Fixed gain - Standby and mute mode - No on/off switching pop noise - low standby current - High supply voltage ripple rejection - Outputs short-circuit protected to ground, supply and across the load - Thermally protected
Pin description Pin 1 2 3 4 5 6 7 8 9 10 11 12 Symbol OUT1GND1 Vcc1 OUT1+ n.c. IN1+ n.c. IN1IN2MODE SVR IN2+ Description negative loudspeaker terminal 1 ground channel 1 supply voltage channel 1 positive loudspeaker terminal 1 not connected poitive input1 not connected negative input1 negative input2 mode selection input half supply voltage decoupling (ripple rejection) positive input2
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Service manual WP 895/895F, CP885/885F, CP485F
Block diagram TDA8944J
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Service manual WP 895/895F, CP885/885F, CP485F
4-5 TDA835xJ Vertical Amplifier The TDA835xJ are power circuit for use in 90o and 110o colour deflection systems for field frequencies of 25 to 200Hz and 16/9 picture tubes. The circuit provides a DC driven vertical deflection output circuit, operating as a highly efficient class G system. Due to the full bridge output circuit the deflection coils can be DC coupled. The IC is constructed in a Low Voltage DMOS process that combines Bipolar, CMOS and DMOS devices. MOS transistors are used in the output stage because of the absence of second breakdown. 4-5-1 TDA8357J Features : - Few external components - High efficient fully DC-coupled vertical output bridge circuit - Short rise and fall time of the vertical flyback switch - Guard circuit - Temperature (thermal) protection - High EMC because of common mode inputs Pinning Pin 1 2 3 4 5 6 7 8 9 Symbol Vi(pos) Vi(neg) Vp VOB GND Vflb VOA VO(guard) VM Description input voltage (positive) input voltage (negative) supply voltage output voltage B ground flyback supply voltage output voltage A guard output voltage input measuring resistor
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Service manual WP 895/895F, CP885/885F, CP485F
4-5-2 TDA8358J An East-West output stage is provided that is able to sink current from the diode modulator circuit. Features : - Few external components - Highly efficient fully DC-coupled vertical output bridge circuit - Short rise and fall time of the vertical flyback switch - Guard circuit - Temperature (thermal) protection - High EMC because of common mode inputs - East-West output stage
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Service manual WP 895/895F, CP885/885F, CP485F
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Service manual WP 895/895F, CP885/885F, CP485F
4-6 TDA6107Q The TDA6107Q includes three video output amplifiers in one plastic DIL-Bent-SIL 9-pin medium power package, using high voltage DMOS technology, and is intended to drive the three cathodes of a colour CRT directly. To obtain maximum performance, the amplifier should be used with black-current control. Features - Typical bandwidth of 5.5 MHz for an output signal of 60 Vpp - High slew rate of 900V/ s - No external components required - Very simple application - Single supply voltage of 200V - Internal reference voltage of 2.5 V - Fixed gain of 50. - Black-current stabilisation (BCS) circuit - Thermal protection Pin description Pin 1 2 3 4 5 6 7 8 9 Symbol Vi(1) Vi(2) Vi(3) GND Iom VDD VOC(3) VOC(2) VOC(1) Description inverting input 1 inverting input 2 inverting input 3 ground (fin) black current measurement output supply voltage cathode output 3 cathode output 2 cathode output 1
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Service manual WP 895/895F, CP885/885F, CP485F
Block diagram TDA6107Q
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Service manual WP 895/895F, CP885/885F, CP485F
4-6 24C16 - 16 Kb EEPROM features : - 16 Kbit serial I2C bus EEPROM - Single supply voltage : 4.5 V to 5.5 V - 1 Million Erase/Write cycles (minimum) - 40 year data retention (minimum) Pin description Pin No. 1, 2, 3 5 6 7 8 4 Name E0, E1, E2 SDA SCL WC Vcc Vss Description Device address - not used Serral Data/Address Input/Output Serial clock Write control Supply voltage Ground
The memory device is compatible with the I2C memory standard. This is a two wire serial interface that uses a bi-directionnal data bus and serial clock. The memory carries a built-in 4-bit unique device type identifier code (1010) in accordance with the I2C bus definition. Serial Clock (SCL) The SCL input is used to strobe all data in and out of the memory. Serial Data (SDA) The SDA pin is bi-directionnal, and is used to transfer data in or out of the memory
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Service manual WP 895/895F, CP885/885F, CP485F
4-8 STR - F6654 4-8-1 General description The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications. 4-8-2 Features - Small SIP fully isolated molded 5 pins package - Many protection functions : * Pulse-by-pulse overcurrent protection (OCP) * Overvoltage protection with latch mode (OVP) * Thermal protection with latch mode (TSD) 4-8-3 Block diagram
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Service manual WP 895/895F, CP885/885F, CP485F
4-8-4 Pins description pin 1 2 3 4 5 name Overcurrent / feedback Source Drain Supply Ground symbol O.C.P./ F.B. S D VIN GND description Input of over current detection signal and feedback signal MOSFET source MOSFET drain Input of power supply for control circuit Ground
4-8-5 Control par