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Daewoo DTW - 28W2F Service Manual

Colour television 66 cm wide stereo
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Service Manual

Colour Television 66 Cm WIDE STEREO
CHASSIS : WP-811N
MODEL : DTW - 28W2F
DTW - 2810F
Specifications
CRT
28" : W66ECK001X44
SYSTEM
PAL / SECAM-B/K, PAL-I/I', SECAM-L/L', NTSC-3.58/4.43 (Play back)
MAIN VOLTAGE
230V AC, 50Hz
Stand-by mode : 2.0 Watts
POWER CONSUMPTION
Normal operating mode : 100 Watts
10 + 10 Watts, 10% THD at RF 60% mod. (1 kHz )
SOUND OUTPUT
12W 8 ohm x 2 EA
SPEAKER
75 ohm unbalanced input ( Din Standard )
ANTENNA IMPEDANCE
TUNING SYSTEM
Frequency Systhesize (FS) Tuning System
TUNER
DT5-BF14D
100 program
NUMBER OF PROGRAM
21 pin EURO-SCART jack (AV input, TV output, RGB input)
AUX. TERMINAL
21 pin EURO-SCART jack (AV input, S-VHS input)
RCA type AV input jack
Headphone jack (3.5 mm )
JACK AUDIO TERMINAL (AUDIO OUT L, R)
REMOTE CONTROL
R-22D05(or R-23D05) with 2 "AAA" type batteries
TOP(5 Page memory) & FLOF(7 Page memory)
TELETEXT
- West option : English, German/Dutch/Flemish, French, Italian, Spanish/Portuguese,
- East option : Polish, Czech/Slovak, Rumanian, Servo-croat, German/Dutch/Flemish,
- West : English, German, French, Italian, Spanish, Nethelands, Swedish
OSD LANGUAGE
- East : English, Russian, Polish, Rumanian, Czech, Hungarian
 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
S/M No: TWP811MEF0
Swedish/Finnish/Danish, Hungarian, Rumanian, Turkish
French, Estonian, Lettish
DEC.2000

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Summary of Contents for Daewoo DTW - 28W2F

  • Page 1: Service Manual

    S/M No: TWP811MEF0 Service Manual Colour Television 66 Cm WIDE STEREO CHASSIS : WP-811N MODEL : DTW - 28W2F DTW - 2810F Specifications 28" : W66ECK001X44 SYSTEM PAL / SECAM-B/K, PAL-I/I', SECAM-L/L', NTSC-3.58/4.43 (Play back) MAIN VOLTAGE 230V AC, 50Hz Stand-by mode : 2.0 Watts...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SAFETY INSTRUCTION ........................2 SPECIFICATIONS ..........................3 CIRCUIT BLOCK DIAGRAM ......................4 ALIGNMENT INSTRUCTION ......................5 SCHEMATIC DIAGRAM ........................11 EXPLODED VIEW ..........................13 PRINTED CIRCUIT BOARD ......................15 SERVICE PARTS LIST ........................16 APPENDIX (" Appendix is provided only by internet [http://svc.dwe.co.kr] ") IC DESCRIPTION ..........................

  • Page 3: Safety Instruction

    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 prodece potentially haz- 2. The only source of X-RAY Radiation in this TV receiver ardous X-RAY RADIATION.

  • Page 4: Specifications

    SPECIFICATIONS Signal Designation Matching Value Audio Out (linked with 3) 0.5Vrms, Imp < 1 k (RF 60% MOD) Audio In (linked with 6) 0.5Vrms, Imp < 10 k Audio Out (linked with 1) 0.5Vrms, Imp < 1 k (RF 60% MOD) Audio Earth Blue Earth Audio in (linked with 2)

  • Page 5: Circuit Block Diagram

    CIRCUIT BLOCK DIAGRAM...

  • Page 6: Alignment Instruction

    ALIGNMENT INSTRUCTIONS User Remocon 1. R-22D05...
  • Page 7 ALIGNMENT INSTRUCTIONS 2. R-23D05...
  • Page 8 ALIGNMENT INSTRUCTIONS * How to Enter the “ Service Mode ” with user remocon. 1) Set the TV Pr 91 2) Sharpness “ MIN “ control. 3) Push the Red, Green, Menu buttons in regular sequency within 5 seconds after setting TV power off. 4) You can see the Menu of “...
  • Page 9 ALIGNMENT INSTRUCTIONS Standard B/G, D/K, I and L 1) Set a Signal Generator with - RF FREQUENCY = 38.9 MHz, - RF OUTPUT LEVEL = 80 5dBuV - Pattern = Color Bar - System = PAL-B/G 2) Connect the Signal Generator RF Output to TP2 (Tuner IF Output). There must be no signal input to the tuner.
  • Page 10 ALIGNMENT INSTRUCTIONS 3. VERTICAL SIZE * The VERTICAL CENTER adjustment has to be done in advance. 1) Apply a RETMA PATTERN Signal. 2) Set the TV to Normal I mode. 3) Adjust the VERTICAL SIZE of the picture with the select V.size by volume UP/DOWN keys.
  • Page 11 ALIGNMENT INSTRUCTIONS WHITE BALANCE 1. RGB Reference R 2. Beam Reference LOW ( 288, 301 : 10Cd/ ) HIGH ( 288, 301 : 10Cd/ 3. Adjust G, B Gain with select Menu G,B of BIAS, DRIVE of select Menu so that R, G, B Bars are on the center position of the analog meter.

  • Page 12: Schematic Diagram

    SCHEMATIC DIAGRAM...

  • Page 14: Exploded View

    EXPLODED VIEW DTW-28W2F...
  • Page 15 EXPLODED VIEW DTW-2810F...

  • Page 16: Printed Circuit Board

    PRINTED CIRCUIT BOARD...

  • Page 17: Service Parts List

    Caution: In this Service 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) SERVICE PARTS LIST is a recommendable part for stock.
  • Page 18 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION C822 CH1AFE472M C CERA AC 4KV 4700PF M KX DE1610 L103 5.80E+42 COIL AFT TRF-A005 D401 DDTV32F--- DIODE DTV32F L401 58H0000054 COIL H-LINEARITY TRL-040F D809 DRGP30J--- DIODE RGP30J...
  • Page 19 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION CC702 HCFK103ZCA C CHIP CERA 50V Y5V 0.01MF Z 2012 HC-49/U 18.43200MHZ X601 5XE18R432E CRYSTAL QUARTZ CC704 HCBK472KCA C CHIP CERA 50V X7R 4700PF K 2012 30PPM CC705 HCBK222KCA C CHIP CERA...
  • Page 20 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION RC544 HRFT102JCA R CHIP 1/10 1K OHM J 2012 QC610 T2SC2412KB TR CHIP 2SC2412K-T146-BR RC546 HRFT202JCA R CHIP 1/10 2K OHM J 2012 QC611 T2SA812T2B TR CHIP 2SA812-T2B RC603...
  • Page 21 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION RC912 HRFT471JCA R CHIP 1/10 470 OHM J 2012 E114 4856310600 EYE LET BSR T0.2 (R2.3) RCA01 HRFT750JCA R CHIP 1/10 75 OHM J 2012 E115 4856310300 EYE LET...
  • Page 22 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION P702 485923162S CONN WAFER YW025-03 (STICK) C673 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP P703 485923182S CONN WAFER YW025-05 (STICK) C674 CEXF1H479C C ELECTRO 50V RUS 4.7MF (5X11) TP R401 RS02Z620JS...
  • Page 23 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION C719 CCZB1H220K C CERA 50V B 22PF K DA15 DUZ5R6BM-- DIODE ZENER UZ-5.6BM(TAPPING) C808 CCZB1H681K C CERA 50V B 680PF K (AXIAL) DA16 DUZ5R1B--- DIODE ZENER UZ-5.1B UNIZON DA17 DUZ5R1B---...
  • Page 24 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION R607 RD-AZ101J- R CARBON FILM 1/6 100 OHM J CCD02 HCFK105ZCA C CHIP CERA 50V Y5V 1MF Z 2012 R608 RD-AZ101J- R CARBON FILM 1/6 100 OHM J CCD03 HCFK105ZCA C CHIP CERA 50V Y5V 1MF Z 2012...
  • Page 25 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION LOC. PART CODE PART NAME DESCRIPTION RCD53 HRFT431JCA R CHIP 1/10 430 OHM J 2012 JCD07 HRFT000-CA R CHIP 1/10 0 OHM 2012 RCD54 HRFT101JCA R CHIP 1/10 100 OHM J 2012 JCD08 HRFT000-CA R CHIP...
  • Page 26 SERVICE PARTS LIST LOC. PART CODE PART NAME DESCRIPTION 2TM10006LB TAPE MASKING 3M #232-MAP-C 6.2X2000M A001 4859811224 PCB VIDEO 123X78(246X180/4) D2Z LS01 5MC0000100 COIL BEAD HC-3550 LS02 5MC0000100 COIL BEAD HC-3550 LS03 5MC0000100 COIL BEAD HC-3550 RD01 RD-AZ103J- R CARBON FILM 1/6 10K OHM J RS01 RD-4Z200J-...
  • Page 27 DAEWOO ELECTRONICS CO., LTD 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX : DWELEC K28177-8 CABLE : “ DAEWOOELEC” E-mail : djkoo@web.dwe.co.kr TEL : 82-2-360-7806 FAX : 82-2-360-7877...

  • Page 28: Ic Description

    APPENDIX IC DESCRIPTION 5-1. ST92195 (1) General Description 1.1 INTRODUCTION the CPU and its peripherals stop operation and the I/O The ST92195 microcnontoller is developed and manufac- ports enter high impedance mode. A reset is necessary to tured by STMicroelecrtonics using a proprietary n-well exit from Halt mode.
  • Page 29 APPENDIX IC DESCRIPTION 1.1.9 PWM Output - Rounding, fringe, double width, double height, scrolling, cursor, full background colour, Control of TV settings is able to be made with up to eight semitransparent mode and reduced intensity colour 8-bit PWM outputs, with a frequency maximum of supported 23,437Hz at 8-bit resolution(INTCLK=12 MHz).
  • Page 30 APPENDIX IC DESCRIPTION (3) Block Diagram...
  • Page 31 APPENDIX IC DESCRIPTION (4) PIN DESCRIPTION RESET Reset (input, active low). The ST9+ is initialised HYNC/CSYNC Horizontal/Composite sync. Horizontal by the Reset signal. With the deactivation of RESET, or composite video synchronisation input to OSD. Posi- program execution begins from the Program memory tive or negativety.
  • Page 32 APPENDIX IC DESCRIPTION 5-2. VPS 3215C(Video Processor) (1) Description including all substandards - 4 composite, 1 S-VHS input, 1 composite output The VPC 3215C is a high-quality, single-chip video front- - integrated high-quality A/D converters and associated end, which is targeted for 4:3 and 16:9, 100/120Hz TV clamp and AGC circuits sets.
  • Page 33 APPENDIX IC DESCRIPTION Pin 12 - Vertical Sync Pulse, VS Pin 52 - VGAV-Input. This pin supplies the vertical sync signal. This pin is connected to the vertical sync signal of a VGA Pin 13 - Front Sync Pulse, FSY signal.
  • Page 34 APPENDIX IC DESCRIPTION 5-3. CIP3250A (Component Interface Processor) (1) Description - digital matrix RGB => YUV (Y, B-Y, R-Y) The CIP 3250A is a new CMOS IC that contains on a sin- - luma contrast and brightness correction for signals from gle chip the entire circuitry to interface analog YUV/RGB/ analog input Fast Blank to a digital YUV system.
  • Page 35 APPENDIX IC DESCRIPTION (4) Pin Description nal(pure binary) or the digital chroma V signal (2’ s compo- Pin 1 - STANDBY Input nent). Leave vacant if not used. Via this input pin, the standby mode of the CIP 3250A is enabled.
  • Page 36 APPENDIX IC DESCRIPTION Pin 44 to 51 - L0 to L7 Luma Input 66, and 68) must be connected together low resistive. The These are the inputs for the digital luma signal which must layout of the PCB must take into consideration the need be in pure binary coded format.
  • Page 37 APPENDIX IC DESCRIPTION Pin 65 - GY Analog Green/Luma Input This input pin takes the AC-coupled analog compinent sig- nal Green or Luma. The amplitude is 1.0V maximum at 75 Ohms and a couplign capacitor of 220nF. Internally, the DC-offset of the input signal is adjusted via the program- mable internal clamping circuit.
  • Page 38 APPENDIX IC DESCRIPTION 5-4. MSM5412222 ( 262, 214-Word X 12-Bit Field Memory ) (1) DESCRIPTION The OKI MSM541222 is a high performance 3-Mbit, 256K x 12-bit, Field Memory. It is especially designed for high-speed serial access applications such as HDTVs, conventional NTSC TVs, VTRs, digital movies and Multi-media systems.
  • Page 39 APPENDIX IC DESCRIPTION (2) FEATURES •Single power supply : 5V •512 Rows x 512 Columns x 12 bits •Fast FIFO (First-In First-Out) operation •High speed asynchronous serial access Read / write cycle time 25 ns / 30 ns Access time 23 ns / 25 ns •Direct cascading capability •Write mask function (Input enable control)
  • Page 40 APPENDIX IC DESCRIPTION (4) Pin Description Pin No. Pin Name Function SWCK Serial Write Clock SRCK Serial Read Clock Write Enable Read Enable Input Enable Output Enable RSTW Write Resert Clock RSTR Read Reset Clock 2,3,5,6,7,8,10,11,12,13,15,16 D 0 ~ D 11 Data Input 29,30,32,33,34,35,37,38,39,40,42,43 0 ~ D...
  • Page 41 APPENDIX IC DESCRIPTION 5-5. DDP 3310B (Display and Deflection Processor) Deflection processing (1) Description - scan velocity modulation output The DDP 3310B is a single-chip digital Display and Deflec- - high-performance H/V deflection tion Processor designed for high-quality backend applica- - EHT compensation for vertical / East/West tions in 100/120MHz TV sets with 4:3- or 16:9 picture - soft start/stop of H-Drive...
  • Page 42 APPENDIX IC DESCRIPTION The vertical protection circuitry prevents the picture tube (4) Pin Description from burn-in in the event of a malfunction of the vertical deflection stage. If the peak-to-peak value of the vertical Pin 1 - Supply Voltage, Output Pin Driver VSUPP* sawtooth signal is too small, the RGB output signals are This pin is used as supply for the following digital output blanked.
  • Page 43 APPENDIX IC DESCRIPTION These pins are used to switch the RGB outputs to the Together with this pin, it can be used to drive symmetrical external analog RGB inputs. FBLIN1 switches the RIN1, deflection amplifiers. GIN1 and BIN1 inputs, FBLIN2 switches the RIN2, GIN2 and BIN2 inputs.
  • Page 44 APPENDIX IC DESCRIPTION Pin 65, 66 - Crystal Output / Input XTAL2 / XTAL1 Pin 51 - Supply Voltage, Digital Circuitry VSUPD* These pins are connectecd to an 5-MHz crystal oscillator. Pin 52 - Ground, Digital Circuitry GNDD* The security unit for the HOUT signal uses this clock sig- Digital Circuitry Input Reference nal as reference.

  • Page 45: Ic Dc Voltage Charts

    APPENDIX IC DC VOLTAGE CHARTS * Input signal PAL/CH5 - Video : 8 step colour bar ( 87% AM ) Audio : 1KHz sinewave ( 60% FM ) * User’ s control condition Contrast, Brightness, Colour, Volume Controls-max. * Line voltage AC 230V, 50Hz * All the voltage in each point are measured with Multimeter.
  • Page 46 APPENDIX IC DC VOLTAGE CHARTS 4. TDA 7269 (I601) Pin No. V(DC) -15.0 -0.1 +15.0 -0.1 +8.5 -15.0 5. ST92195 (I701) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) -0.3 Pin No. V(DC) 6.
  • Page 47 APPENDIX IC DC VOLTAGE CHARTS 9. P503 Pin No. V(DC) Pin No. V(DC) -0.3 12.1 10. P504 Pin No. V(DC) Pin No. V(DC)

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