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Daewoo WP-895, Service Manual


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

Pin

Symbol

Function

19

V

SW

AFC switch

20, 21

V

VCO

VCO circuit

22

V

AFC

AFC output

23

V

S

Supply voltage

24

V

O, FM

Intercarrier output

25

V

O, AM

AF output-AM sound

26

R

COMP

Offset compensation

27, 28

V

i,SIF2

SIF2 input (symmetrical)

4-3-4 Block diagram

Offset

26

18

20

21

14

VCO

l' switch

VCO

Control

phase shift

FPLL

VIF amp

Loop
filter

comp.

(optional)

+

4,9,16

AM det.

FM det.

25

24

17

Cref

23

13

22

19

6

7

8

15

11

10

27

28

3

1

2

SIF 1

CAGC

5

Standard

Video det.

VIF

CAGC

CBL

AGC
(VIF)

Tuner
AGC

AGC
(SIF)

Tuner

SIF 2

SIF input
   switch

SIF amp

Take over
    point

Video

AFC

 AFC
switch

AFC

Supply

Standard
  switch

V

AF

(AM)

Intercarrier

(FM/NICAM)

Summary of Contents for WP-895

Page 1: ...evision 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...

Page 2: ...th embedded 8 bit Controller 19 4 1 1 Block diagram off the VCT 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...

Page 3: ...nal 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 Controll...

Page 4: ...8 1 Flybac k voltage 57 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 aral descr...

Page 5: ...erial input 75 ohm unbalanced Channel coverage Off 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 indica...

Page 6: ...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...

Page 7: ...Input 0 7 Vpp 0 1V Impedance 75 16 Fast Switching 0 to 0 4V Logic 0 1 to 3V Logic 1 Impedance 75 17 Video Out Earth 18 Video In Earth 19 Video Output 1 Vpp 3dB Impedance 75 20 Video Input 1 Vpp 3dB Im...

Page 8: ...7 Service manual WP 895 895F CP885 885F CP485F 19 Video Output 1 Vpp 3dB Impedance 75 Monitor output Not available for cp885 20 Video Input Y In 1 Vpp 3dB Impedance 75 21 Common Earth...

Page 9: ...83 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...

Page 10: ...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...

Page 11: ...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...

Page 12: ...e pro grams from the selected country and named by the TV controlling softw are Within this group the sorting order is fixed by the A TSS list Group II It contains all the pro grams with a strong sign...

Page 13: ...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 ec...

Page 14: ...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 an...

Page 15: ...exit SERVICE menu press menu key or Std By key 3 2 Service mode navigation Pr Up Down remote keys cycle through the service items available Vol remote keys Decrement Increment the values within range...

Page 16: ...OP text off FASTEXT FLOF off TUBE 4 3 AUTO 4 3 switch to PANORAMA SVHS3 disable 0 TOP text on FASTEXT FLOF on TUBE 16 9 AUTO 4 3 switch to 4 3 X SVHS3 enable Tuner options 00 Philips 01 ALPS 10 Philip...

Page 17: ...g 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 en...

Page 18: ...EN 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 Ser...

Page 19: ...95 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...

Page 20: ...coder 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...

Page 21: ...ble 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 cor...

Page 22: ...ideo 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 se...

Page 23: ...lter Panorama Scaler 4 1 11 IC marking and version Chassis OSD languages ATSS countries Text CP885 VCT3832A CP885F VCT3834A WP895F CP485F VCT3834A WP895 VCT3834A Pan European Latin Cyrillic Greek GB F...

Page 24: ...Vertical Sawtooth Output 36 EW OUT Vertical Parabola Output 37 SENSE IN SenseADC Input 38 GNDM SUPPLY Ground MADC Input 39 RSW1 OUT Range Switch1 for MeasurementADC 40 RSW2 OUT Range Switch2 for Measu...

Page 25: ...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 Power 1 2 3 4 5 7 8 9 10 17 19 20 21 22 23 24 25 26 27 28 29 31 30 32 18 11 12 13 14 15 1...

Page 26: ...tection 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 algori...

Page 27: ...sh 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 c...

Page 28: ...Mono NICAM PAL UK D K 6 5 6 2578125 D K1 FM Stereo SECAM East USSR 6 5 6 7421875 D K2 6 5 5 85 D K NICAM FM Mono NICAM Hungary Architecture of MSP341x Pin connections and short description Pin No Pin...

Page 29: ...ed 35 VREF1 Reference ground 1 high voltage part 36 SC1_OUT_R Out Scart output 1 right 37 SC1_OUT_L Out Scart output 1 left 38 NC Not Connected 39 AHVSUP Analog power supply 8 0V 40 CAPL_M Volume capa...

Page 30: ...lation 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...

Page 31: ...on 27 28 Vi SIF2 SIF2 input symmetrical 4 3 4 Block diagram Offset 26 18 20 21 14 VCO l switch VCO Control phase shift FPLL VIF amp Loop filter comp optional 4 9 16 AM det FM det 25 24 17 Cref 23 13 2...

Page 32: ...itive input2 4 4 TDA894xJ Stereo AudioAmplif ier 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 contai...

Page 33: ...32 Service manual WP 895 895F CP885 885F CP485F Block diagram TDA8944J...

Page 34: ...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 effici...

Page 35: ...le 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 s...

Page 36: ...35 Service manual WP 895 895F CP885 885F CP485F...

Page 37: ...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...

Page 38: ...37 Service manual WP 895 895F CP885 885F CP485F Block diagram TDA6107Q...

Page 39: ...tput 6 SCL Serial clock 7 WC Write control 8 Vcc Supply voltage 4 Vss Ground The memory device is compatible with the I2C memory standard This is a two wire serial interface that uses a bi directionna...

Page 40: ...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 pul...

Page 41: ...ff 9 10 11 V Circuit current in 4 5 IIN on 30 mA operation Circuit current in non 4 5 IIN off 100 A operation Maximum OFF time TOFF max 45 55 SEC Minimum time for input of 1 5 TTH 2 1 0 SEC quaxi reso...

Page 42: ...8 6 MOSFET electrical characteristics IC PINS RATING NUMBER MIN TYPE MAX Drain to source break 3 2 VDSS 650 V voltage Drain leakage current 3 2 IDSS 300 A On resistance 3 2 RDS on 1 15 Switching time...

Page 43: ...42 Service manual WP 895 895F CP885 885F CP485F 5 Circuit description 5 1 Block diagram...

Page 44: ...the differential input Pin 6 7 of the VIF amplifier 5 2 2 Vision IF Amplifier This amplifier consists of three AC coupled amplifier stages Each differential amplifier is gain controlled by the automat...

Page 45: ...ed to the tuner AGC to generate the tuner AGC current at Pin 11 open collector output The take over point of the tuner AGC can be adjusted at Pin 10 by a potentiometer or an external dc voltage from i...

Page 46: ...ion The SIF AGC is related to the average level of AM or FM carrier and controls the SIF amplifier to provide a constant SIF signal to the AM demodulator and QPS mixer 5 2 7 Quasi Parallel Sound QPS M...

Page 47: ...f S VHS carrier chrominance signal These inputs are internally biased and have a fixed gain amplifier 5 3 4 Clamping The composite video input signals are AC coupled to the IC The clamping voltage is...

Page 48: ...e for all colour standards The colour killer uses the burst phase burst frequency measurement to identify a PAL NTSC or SECAM colour signal For PAL NTSC the colour is switched off killed as long as th...

Page 49: ...it TheYC r C b signals are converted by a program mable matrix to RGB colour space The digital OSD insertion circuit allows the insertion of a 5 bit OSD signal The OSD signals and the display clock ar...

Page 50: ...witch back to BCL limited drives and brightness 5 3 17 Analogue RGB Insertion The VCT 38xxA allows insertion of external analogue RGB signals The RGB signal is key clamped and inserted into the main R...

Page 51: ...d digital circuitry VSUP D 5 4 Microcontroller 5 4 1 Introduction The TV controller basically consists of the CPU RAM ROM and a number of peripheral modules For instance a memory banking module is inc...

Page 52: ...ports serves as input for the analogue to digital converter Controller I O pin configuration and function table pin name description To reduce power consumption in stand by mode all ports not used ar...

Page 53: ...orizontal geometrical error typically 8 linear ZOOM 16 9 133 100 Picture is displayed 16 9 picture letter box filling the full screen format with 430 active width and height lines PANORAMA 100 100 Pic...

Page 54: ...l or on the television 4 S SW 1 or S SW 2 represent the SLOW SWITCHING inputs of the first SCART AV 1 or second SCART AV 2 these each being pin number 8 5 F SW 1 represents the FAST SWITCHING input of...

Page 55: ...nt for a given broadcaster the intended language that the teletext page should be displayed in As there are only 3 bits there are only 8 codes available to cover all the possible language combinations...

Page 56: ...erman Italian Spanish Dutch Danish Finnish Norwegian Swedish Greek Polish Hungarian Czech Slovakian Rumanial Russian 5 6 Sound processing 5 6 1 Analogue sound IF input section The input pins ANA_IN1 a...

Page 57: ...the signal quality and automatically switches to the analogue sound carrier 1 if the transmission quality is too poor To avoid unwanted automatic switching the threshold levels mono to stereo and ster...

Page 58: ...put current through the deflection coils measured as voltage across R398 which provides internal feedback information The voltage across R398 is proportional to the output current 5 8 1 Flyback voltag...

Page 59: ...control IC designed for flyback converter type switch mode power supply applications 5 9 2 Power supply primary part operations An oscillator generates pulses signals which turn on and off a MOSFET t...

Page 60: ...ding voltage does not increase to the set voltage immediately after the control circuit starts operating VIN starts dropping However as this winding voltage reaches the set value before VIN voltage dr...

Page 61: ...60 Service manual WP 895 895F CP885 885F CP485F 5 9 2 2 STR F6654 oscillating operation...

Page 62: ...ime determined by C1 and R1 is the OFF time of the MOSFET When C1 voltage falls to around 3 7V the STR F6654 internal oscillator is reversed again and the MOSFET turns ON C1 is quickly charged to arou...

Page 63: ...and There regulators provide 5V 3 3V DC voltage to I501 microcontroller power supply pins pin 3 pin 54 and to the reset pulse circuit which provides reset pulse to I501 microcontroller reset pin pin...

Page 64: ...before switching off the microcontroller switches TV set to stand by mode decreasing power pin voltage pin 1 5 10 2 TV normal run and stand by mode operations Depending on remote control commands I501...

Page 65: ...nnected to the ground and I810 controlled rectifier gate pin is set to low no conducting So current from 14V DC voltage from T801 SMPS transformer pin 13 does not flow through Q811 and Q810 transistor...

Page 66: ...an IC error amplifier I806 which corrects unexpected DC voltage variations on this line power supply IC delivery during TV set normal run power supply line IC power supply delivery Remarks 143V FBT FB...

Page 67: ...66 Service manual WP 895 895F CP885 885F CP485F...

Page 68: ...rolled rectifier gate pin is set to high and I810 is conducting So current flows from pin 16 SMPS transformer to the ground via I804 optocoupler and Q810 and Q811 transistors which are conducting In t...

Page 69: ...0 BAG P E PE FOAM t0 5x1600x1270 0000A 4857027800 HEAT SINK AL EX 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN SP01 4858311110 SPEAKER 12W 8 OHM SP 58126F SP02 4858311110 SPEAKER 12W 8 OHM SP 5812...

Page 70: ...CONN WAFER YPW500 02 Q401 T2SD1880 TR 2SD1880 Q401A 4857024500 HEAT SINK AL EX Q401B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN R398 RD 2Z109J R CARBON FILM 1 2 1 OHM J R399 RS02Y180JS R M OXIDE FILM...

Page 71: ...V RSS 1MF 5X11 TP C614 CEXF1H109V C ELECTRO 50V RSS 1MF 5X11 TP C615 CEXF1H109V C ELECTRO 50V RSS 1MF 5X11 TP C616 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP C617 CBXF1H104Z C CERA SEMI 50V F 0 1MF Z T...

Page 72: ...H220J C CERA 50V SL 22PF J AXIAL C163 CCZF1H103Z C CERA 50V F 0 01MF Z C500 CCZF1H103Z C CERA 50V F 0 01MF Z C501 CCZF1H103Z C CERA 50V F 0 01MF Z C503 CBZF1H104Z C CERA SEMI 50V F 0 1MF Z AXIAL C505...

Page 73: ...DBAV21 DIODE BAV21 TAPPING D913 DBAV21 DIODE BAV21 TAPPING D997 DBYT51J DIODE BYT51J TAPPING DA10 DTZX5V6B DIODE ZENER TZX5V6B TAPPING DA11 DTZX5V6B DIODE ZENER TZX5V6B TAPPING DA15 DTZX5V6B DIODE ZE...

Page 74: ...PPER AWG22 1 0 65 TIN COATING J883 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J885 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J887 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J888 858010...

Page 75: ...10K OHM J R532 RD AZ223J R CARBON FILM 1 6 22K OHM J R533 RD AZ103J R CARBON FILM 1 6 10K OHM J R535 RD AZ201J R CARBON FILM 1 6 200 OHM J R537 RD AZ201J R CARBON FILM 1 6 200 OHM J R540 RD AZ101J R C...

Page 76: ...HM J R829 RD AZ103J R CARBON FILM 1 6 10K OHM J R830 RD AZ332J R CARBON FILM 1 6 3 3K OHM J R841 RD 2Z470J R CARBON FILM 1 2 47 OHM J R851 RD AZ391J R CARBON FILM 1 6 390 OHM J R852 RD AZ102J R CARBON...

Page 77: ...RO 400V LHS 180MF 25X35 C811 CCYR3D681K C CERA 2KV R 680PF K 125C C812 CH1AFE472M C CERA AC 4KV 4700PF M KX DE1610 C813 CEXF2E101V C ELECTRO 250V RSS 100MF 18X35 5 C814 CEYF2E470V C ELECTRO 250V RSS 4...

Page 78: ...PTION REMARK C508 CEXF1H220V C ELECTRO 50V RSS 22MF 5X11 TP C510 CCXF1H473Z C CERA 50V F 0 047MF Z TAPPING C511 CEXF1E100V C ELECTRO 25V RSS 10MF TP C519 CEXF1H109V C ELECTRO 50V RSS 1MF 5X11 TP C520...

Page 79: ...K C CERA 50V B 470PF K AXIAL CA16 CCZB1H471K C CERA 50V B 470PF K AXIAL CA17 CCZB1H471K C CERA 50V B 470PF K AXIAL LOC PART CODE PART NAME DESCRIPTION REMARK CA18 CCZB1H471K C CERA 50V B 470PF K AXIAL...

Page 80: ...WG22 1 0 65 TIN COATING J921 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J924 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J925 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J926 85801065GY W...

Page 81: ...BON FILM 1 6 1K OHM J R710 RD AZ102J R CARBON FILM 1 6 1K OHM J LOC PART CODE PART NAME DESCRIPTION REMARK R711 RD AZ103J R CARBON FILM 1 6 10K OHM J R712 RD AZ181J R CARBON FILM 1 6 180 OHM J R713 RD...

Page 82: ...TP C866 CCYR3A471K C CERA 1KV 470PF K 125C C900 CCXB3D102K C CERA 2KV B 1000 PF K TAPPING C910 CEXF2E479V C ELECTRO 250V RSS 4 7MF 10X16 TP C997 CEXF2E100V C ELECTRO 250V RSS 10MF 10X20 TP D403 DDG3 D...

Page 83: ...11 TP C608 CEXF1E100V C ELECTRO 25V RSS 10MF TP C610 CEXF1E100V C ELECTRO 25V RSS 10MF TP C611 CEXF1H339V C ELECTRO 50V RSS 3 3MF 5X11 TP C612 CEXF1H109V C ELECTRO 50V RSS 1MF 5X11 TP LOC PART CODE PA...

Page 84: ...IPTION REMARK D521 D1N4148 DIODE 1N4148 TAPPING D533 D1N4148 DIODE 1N4148 TAPPING D534 D1N4148 DIODE 1N4148 TAPPING D537 D1N4148 DIODE 1N4148 TAPPING D550 D1N4148 DIODE 1N4148 TAPPING D551 D1N4148 DIO...

Page 85: ...RBON FILM 1 6 2 2K OHM J R116 RD AZ682J R CARBON FILM 1 6 6 8K OHM J R117 RD AZ682J R CARBON FILM 1 6 6 8K OHM J R118 RD AZ151J R CARBON FILM 1 6 150 OHM J R120 RD AZ101J R CARBON FILM 1 6 100 OHM J R...

Page 86: ...1 4 1K OHM J R823 RD 4Z682J R CARBON FILM 1 4 6 8K OHM J LOC PART CODE PART NAME DESCRIPTION REMARK R829 RD AZ103J R CARBON FILM 1 6 10K OHM J R830 RD AZ332J R CARBON FILM 1 6 3 3K OHM J R841 RD 2Z470...

Page 87: ...Service Manual WP 895 895F CP885 885F CP485F 86 7 Exploded View 7 1 DWX 28W5...

Page 88: ...Service Manual WP 895 895F CP885 885F CP485F 87 7 Exploded View 7 2 DWF 28W8...

Page 89: ...Service Manual WP 895 895F CP885 885F CP485F 88 7 Exploded View 7 3 DTF 29U8...

Page 90: ...Service Manual WP 895 895F CP885 885F CP485F 89 7 Exploded View 7 4 DTP 28A7...

Page 91: ...Service Man ual WP 895 895F CP885 885F CP485F 90 7 Exploded View 7 5 DTP 28B1...

Page 92: ...Service Man ual WP 895 895F CP885 885F CP485F 91 7 Exploded View 7 6 DTP 28G7...

Page 93: ...Service Manual WP 895 895F CP885 885F CP485F 92 7 Exploded View 7 7 DTP 28G8...

Page 94: ...Service Manual WP 895 895F CP885 885F CP485F 7 8 DWF 28W9 93 7 Exploded View...

Page 95: ...94 Service Manual WP 895 895F CP885 885F CP 485F 7 9 DTB 21U7 7 Exploded view...

Page 96: ...SCHEMATIC DIAGRAM WP 895 CP 885...

Page 97: ...SCHEMATIC DIAGRAM WP 895F CP 885F...

Page 98: ...SCHEMATIC DIAGRAM CP 485F...

Page 99: ......

Page 100: ......

Page 101: ...CP 485F...

Page 102: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC...

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