Daewoo DTJ - 28A6F Service Manual
  1. Manuals
  2. Brands
  3. Daewoo Manuals
  4. TV
  5. DTJ-28G8F
  6. Service manual
Daewoo DTJ - 28A6F Service Manual

Daewoo DTJ - 28A6F Service Manual

66 cm stereo colour television
Hide thumbs Also See for DTJ - 28A6F:
Table of Contents

Advertisement

Quick Links

Download this manual

Service Manual

66 Cm STEREO Colour Television
DAEWOO ELECTRONICS CO., L TD.
http://svc.dwe.co.kr
S/M No: CP810P-010
CHASSIS : CP-810
MODEL : DTJ - 28A6F
DTJ - 28A7F
DTJ - 28B1F
DTJ - 28G6F
DTJ - 28G7F
DTJ - 28G8F
MAR,2000

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DTJ - 28A6F and is the answer not in the manual?

Questions and answers

Related Manuals for Daewoo DTJ - 28A6F

Summary of Contents for Daewoo DTJ - 28A6F

  • Page 1: Service Manual

    S/M No: CP810P-010 Service Manual 66 Cm STEREO Colour Television CHASSIS : CP-810 MODEL : DTJ - 28A6F DTJ - 28A7F DTJ - 28B1F DTJ - 28G6F DTJ - 28G7F DTJ - 28G8F DAEWOO ELECTRONICS CO., L TD. http://svc.dwe.co.kr MAR,2000...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. Safety Instruction ........................2 2. Specifications ..........................3 3. Circuit block Diagram ......................... 5 4. Alignment Instructions ....................... 6 5. IC Description ..........................12 6. IC DC Voltage Charts ........................32 7. Service Parts List/Recommendable Spare Parts List .............. 35 8.

  • Page 3: Safety Instruction

    1. 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

    2. Specifications 28" : A66EAK071X54 ( PHILIPS ) System PAL/SECAM-B/G, D/K, PAL-I/I’, SECAM-L/L’, NTSC-3.58/4.43 (Play back ) Main Voltage 230V AC, 50Hz Power Consumption Stand-by mode : 2.0 Watts Normal operating mode : 80 Watts Sound output 10 + 10 Watts, 10% THD at RF 60% mod. ( 1 kHz ) Speaker 12W 8ohm x 2 EA Antenna Impedance...
  • Page 5 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 6: Circuit Block Diagram

    3. Circuit Block Diagram...

  • Page 7: Alignment Instructions

    4. Alignment Instructions 4-1. User Remocon R-22D05...
  • Page 8 Alignment Instructions R-23D05...
  • Page 9 Alignment Instructions * How to Enter the “ Service Mode ” with user remocon. 1) Set the TV Pr 91 2) Sharpness “ MIN “ control. 3) Red, Green, Yellow buttons in regular sequency within 5 seconds after setting TV power off. 4) You can see the Menu of “...
  • Page 10 Alignment Instructions 4-2. AFT 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 11 Alignment Instructions 4-6-3 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 12 Alignment Instructions 4-8. WHITE BALANCE 4-8-1 RGB Reference R 4-8-2 Beam Reference LOW ( 288, 301 : 10Cd/ HIGH ( 288, 301 : 10Cd/ 4-8-3 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 13: Ic Description

    5. IC description 5-1. ST92195 (1) General Description 1.1 INTRODUCTION ports enter high impedance mode. A reset is necessary to exit from Halt mode. The ST92195 microcnontoller is developed and manufac- 1.1.3 I/O Ports tured by STMicroelecrtonics using a proprietary n-well Up to 28 I/O lines are dedicated to digital Input/Output.
  • Page 14 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 15 IC description (3) Block Diagram...
  • Page 16 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 17 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 18 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. This pin supplies the front sync information.
  • Page 19 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 20 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. A high level voltage switches all outputs to Pin 29 - AVI Active Video Input tristate mode, and power consumption is signigicantly In a DIGIT 2000 application, this input can be connected...
  • Page 21 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 22 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 23 IC description 5-4. SDA9255 (Scan Rate Converter ) (1) Features • 100/120 Hz interlaced scan conbersion • Data format 4:1:1 • On chip field memory • Digital vertical zooming • Digital vertical panning] • Motion adaptive temporal noise reduction, field based •...
  • Page 24 IC description (3) Block Diagram...
  • Page 25 IC description (4) Pin Description Pin No. Name Type Description 2,8,24,26,41,55 Supply voltage ( = 0V) 9,25,40,56 Supply voltage ( = 5V) Data input Y (see data format) 42,...,49 YIN0 ... 7 I/TTL Data input UV (see data format) 36,...,39 UVIN4 ...
  • Page 26 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 tubes.
  • Page 27 IC description (4) Pin Description The vertical protection circuitry prevents the picture tube from burn-in in the event of a malfunction of the vertical Pin 1 - Supply Voltage, Output Pin Driver VSUPP* deflection stage. If the peak-to-peak value of the vertical sawtooth signal is too small, the RGB output signals are This pin is used as supply for the following digital output blanked.
  • Page 28 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 Pin 21 - East/West Parabola Output EW and BIN2 inputs.
  • Page 29 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 30 IC description 5-6. DPL 3519A (Dolby Pro Logic Processor) (1) General Description The DPL 3519A is designed as a coprocessor to the MSP family but has analog output channels in addition to the fea- tures of the DPL 3518A. Together with the MSP, a TV set with up to six outputs (L, R, C, SUB, )can be developed together with headphones and several line outputs.
  • Page 31 IC description (3) Block Diagram (4) Pin Description Pin No. PIN Name Type Description D_CTR_IN Digital control input AUD_CL_OUT Audio clock output D_CTR_IO1 IN/OUT Digital control IO1 D_CTR_IO1 IN/OUT Digital control IO 0 ADR_SEL -Bus address select STANDBYQ Standby (low-active) I2C_CL clock I2C_DA...
  • Page 32 IC description Pin No. PIN Name Type Description I2S_DA_OUT - data output RESETQ Power-on-reset 20/19:DACC2_R 18:NC Analog output Channel2, right 20/19:DACC2_R 18:NC Analog output Channel2, left 20/19:VREF2 18:NC Reference ground2 high voltage part 20/19:DACC1_R 18:NC Analog output Channel1, right 20/19:DACC1_L 18:NC Analog output Channel1, left Not connected 20/19:SC2_OUT_R 18:NC...

  • Page 33: Ic Dc Voltage Charts

    6. 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 34 IC DC Voltage Charts 4. TDA 7269 (I601) Pin No. V(DC) -14.2 +14.2 -14.2 5. ST92195 (I701) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) 6. AT24C16-10PC (I702) Pin No. V(DC) 7.
  • Page 35 IC DC Voltage Charts Pin No. V(DC) Pin No. V(DC) Pin No. V(DC) 9. TEA5101B (I901) Pin No. V(DC) 12.2 210.0 172.0 115.0 177.0 Pin No. V(DC) 119.0 168.0 116.0 10. P503 Pin No. V(DC) Pin No. V(DC) -0.3 12.1 11.

  • Page 36: Service Parts List/Recommendable Spare Parts List

    7. Service Parts List/Recommendable Spare Parts List is recommendable spare part. Caution is safety component, so it must be used the same component. PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK ZZ100 48B3822D05 TRANSMITTER R-22D05 P601A 4850704S30 CONNECTOR YH025-...
  • Page 37 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK C602 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C826 CEXF1E101V C ELECTRO 25V RSS 100MF (6.3X11) C603 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C605 CEXF1E471C C ELECTRO...
  • Page 38 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK CC604 HCFK103ZCA C CHIP CERA 50V Y5V 0.01MF Z 2012 CC701 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 CC609 HCBK102KCA C CHIP CERA 50V X7R 1000PF K 2012 CC702...
  • Page 39 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK D701 D1N4148--- DIODE 1N4148 (TAPPING) DA20 DUZ5R6BM-- DIODE ZENER UZ-5.6BM(TAPPING) D703 DUZ5R1B--- DIODE ZENER UZ-5.1B UNIZON DA21 DUZ5R6BM-- DIODE ZENER UZ-5.6BM(TAPPING) D705 D1N4148--- DIODE 1N4148 (TAPPING)
  • Page 40 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK I808 1KA7808--- IC REGULATOR KA7808 L610 58C0000116 COIL BEAD HC-3550R I809 1UPC574J-- UPC574J L620 5CPX100K04 COIL PEAKING 10UH K ELC0607RA I810 TX0202DA-- THYRISTOR X0202DA1BA2 L621...
  • Page 41 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK QC402 T2SC2412KB TR CHIP 2SC2412K-T146-BR R417 RF-4Y228K- R FUSIBLE 1/4 0.22 OHM K QC405 T2SA812T2B TR CHIP 2SA812-T2B R418 RF01Z188K- R FUSIBLE 1W 0.18 OHM K (TAPPING) QC501 T2SC2412KB...
  • Page 42 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK R907 RD-AZ242J- R CARBON FILM 1/6 2.4K OHM J RC411 HRFT123JCA R CHIP 1/10 12K OHM J 2012 R908 RS01Z683J- R M-OXIDE FILM 1W 68K OHM J (TAPPING) RC412 HRFT101JCA...
  • Page 43 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK RC730 HRFT101JCA R CHIP 1/10 100 OHM J 2012 SW704 5S50101090 SW TACT SKHV17910A RC731 HRFT161JCA R CHIP 1/10 160 OHM J 2012 SW801 5S40101143 SW POWER PUSH PS3-22SP (P.C.B)
  • Page 44 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK CCD12 HCBK473KCA C CHIP CERA 50V X7R 0.047MF K 2012 JCD03 HRFT000-CA R CHIP 1/10 0 OHM 2012 CCD13 HCBH224KCA C CHIP CERA 25V X7R 0.22MF K 2012 JCD04 HRFT000-CA...
  • Page 45 Service Parts List/Recommendable Spare Parts List PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK RCD20 HRFT750JCA R CHIP 1/10 75 OHM J 2012 RCS24 HRFT122JCA R CHIP 1/10 1.2K OHM J 2012 RCD21 HRFT750JCA R CHIP 1/10 75 OHM J 2012 RCS25 HRFT152JCA R CHIP...

  • Page 46: Mechanical Exploded View

    8. Mechanical Exploded View 1. DTJ-28A6F...
  • Page 47 Mechanical Exploded View 2. DTJ-28A7F...
  • Page 48 Mechanical Exploded View 3. DTJ-28B1F...
  • Page 49 Mechanical Exploded View 4. DTJ-28G6F...
  • Page 50 Mechanical Exploded View 5. DTJ-28G7F...
  • Page 51 Mechanical Exploded View 6. DTJ-28G8F...

  • Page 52: Printed Circuit Board

    10. Printed Circuit Board...
  • Page 54 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 : leesk@web.dwe.co.kr FAX : 82-2-360-7802 TEL : 82-2-360-7877...

Table of Contents