Daewoo DTD-14D3 Service Manual
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Daewoo DTD-14D3 Service Manual

Daewoo DTD-14D3 Service Manual

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Service Manual

Colour Television

CHASSIS : CM-905S/SF
Model :
DTD-14D3/20D3/21D3 ME/MT/MP/MZ
14D4/20D4/21D4
14D6/21D6
14D7/20D7/21D7
21U6/21U8
Specification
Items
Model
DTD-14D3/20D3/21D3 ME/MT/MP/MZ
14D4/20D4/21D4 ME/MT/MP/MZ
14D6/21D6 ME/MT/MP/MZ
14D7/20D7/21D7 ME/MT/MP/MZ
21U6/21U8 ME/MT/MP/MZ
TV Standards
PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV)
Mains Voltage
AC 100~250V, 50/60Hz
Power Consumption
Stand-by mode : 5W
Normal Operating Mode :
Sound Ouput1
14/20"=5W+5W Over(80% MOD.at 1KHz THD.10%)
21U6=5W+5W Over(80% MOD.at 1KHz THD.10%)
21",21U8=7W+7W Over(80% MOD.at 1KHz THD.10%)
Speaker
14/20"=7.5W 8 Ohm (2pcs)
21U6=5W 8 Ohm (2pcs) , 21",21U8=12W 8 Ohm (2pcs)
Antenna
75 Ohm Unbalanced. (DIN Standard)
Tuning System
FS Tuning System
Memory Channel
100 Channels
Remocon Control
R-44C07
Reception Channel
VHF - BAND1 : CH2-CH4
UHF-BAND : CH21-CH69
Remark
OSD
TELETEXT (Top & Flop Teletext)
PIP(AV PIP , Swap, Size, Position)
Digital Eye
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
S/M No. : TCM905SEF0
ME/MT/MP/MZ
ME/MT/MP/MZ
ME/MT/MP/MZ
ME/MT/MP/MZ
14"=85W, 20"=95W, 21"=105W, 21"(flat)=115W
BAND2 : CH5-CH12
CABLE BAND : S1'-S3, S1-S20
HYPER BAND : S21-S41
June.2001

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Summary of Contents for Daewoo DTD-14D3

  • Page 1: Service Manual

    VHF - BAND1 : CH2-CH4 BAND2 : CH5-CH12 CABLE BAND : S1’-S3, S1-S20 HYPER BAND : S21-S41 UHF-BAND : CH21-CH69 Remark TELETEXT (Top & Flop Teletext) PIP(AV PIP , Swap, Size, Position) Digital Eye DAEWOO ELECTRONICS CO., LTD http : //svc.dwe.co.kr June.2001...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SPECIFICATIONS ......................2 SAFETY INSTRUCTION ....................3 CIRCUIT BLOCK DIAGRAM ..................... 4 ALIGNMENT INSTRUCTIONS ..................5 CM-905S/SF TYPICAL SERVICE DATA ................8 SCHEMATIC DIAGRAM ..................... 11 PRINTED CIRCUIT BOARD ....................12 MECHANICAL EXPLODED VIEW AND PARTS LIST ............13 ELECTRICAL PARTS LIST ....................

  • Page 3: Specifications

    SPECIFICATIONS CAUTION Items Model DTD-14D3/20D3/21D3 ME/MT/MP/MZ 14D4/20D4/21D4 ME/MT/MP/MZ 14D6/21D6 ME/MT/MP/MZ 14D7/20D7/21D7 ME/MT/MP/MZ 21U6/21U8 ME/MT/MP/MZ TV Standards PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV) Mains Voltage AC 100~250V, 50/60Hz Power Consumption Stand-by mode : 5W Normal Operating Mode : 14”=85W, 20”=95W, 21”=105W, 21”(flat)=115W Sound Ouput1 14/20”=5W+5W Over(80% MOD.at 1KHz THD.10%) 21U6=5W+5W Over(80% MOD.at 1KHz THD.10%)

  • Page 4: Safety Instruction

    SAFETY INSTRUCTION CAUTION NOTE BEFORE SERVICING THIS CHASSIS READ THE “X-RAY RADIATION PRECAUTIONS”, “SAFETY PRECAUTIONS” AND “PRODUCT SAFETY NOTICE” BELOW. X-RAY RADIATION PRECAUTIONS 1. Excessive high voltage can produce potentially hazard- of the high voltage recorded as a part of the service ous X-RAY RADIATION.

  • Page 5: Circuit Block Diagram

    CIRCUIT BLOCK DIAGRAM CAUTION - 4 -...

  • Page 6: Alignment Instructions

    ALIGNMENT INSTRUCTIONS CAUTION 1. AGC ADJUSTMENT 1) Pattern : PAL B/G 10CH Color BAR (RF Level = 60 dB) 2) Connect the Pattern Generator RF Output to Tuner RF Input. 3) Press the S10 Key of Service Remocon to enter the “AGC MODE”. 4) Execute the “AUTO AGC”...
  • Page 7 ALIGNMENT INSTRUCTIONS 5-3. HORIZONTAL CENTER ADJUSTMENT 1) Pattern : PAL B/G Retma 2) Choose the “H-CENTER” using the Pr-Up/Down Keys. 3) Adjust the vertical line of picture to coincide with the mechanical center marks of the CRT using the Vol-Up/Down Keys. 5-4.
  • Page 8 ALIGNMENT INSTRUCTIONS 6. REMOCON 6-1. SERVICE REMOCON 6-2. USER REMOCON POWER RECALL MUTE ADD/ERASE SURROUND MENU POSITION PAUSE/ TV/VIDEO STILL POSITION SIZE SLEEP R-34SVC 6-3. SERVICE REMOCON 1) Enter SERVICE MODE : Press keys of User Remocon, as follows. Ch91, Sharpness 0, Skip(red), Move(green), Menu. 2) Choice SERVICE MENU : Pr-Up/Down 3) Enter SERVICE SUB MENU : Vol-Up/Down 4) Adjust SERVICE MENU : Vol-Up/Down...

  • Page 9: Cm-905S/Sf Typical Service Data

    CM-905S/SF TYPICAL SERVICE DATA CAUTION CM-905S/SF SVC KEY & FUNCTION DESCRIPTION EY N NAME RFUNCTION PRESS THE S1 ONE TINE ----> PRESS THE S1 ANOTHER TIME HEATRUN MODE ON/OFF (HEATRUN MODE) (NORMAL OPRATION) * FBT SCREEN ADJUSTMENT SCREEN PRESS THE S2 ON TIME ----> PRESS THE S2 ANOTHER TIME ON/OFF ADJUSTMENT (HORIZONTAL KINE)
  • Page 10 CM-905S/SF TYPICAL SERVICE DATA CM-905S/SF SVC KEY & FUNCTION DESCRIPTION WHITE BALANCE * ADJUST WHITE BALANCE DATA R LOW BEAM G LOW BEAM B LOW BEAM G HIGH BEAM B HIGH BEAM SUB-BRIGHT ADJUST BRIGHTNESS DATA SUB-CONTRAST ADJUST SUB CONTRAST DATA * MAIN RF AGC ADJUSTMENT KEY TUNER AGC VOLTAGE 3.5Vdc AUTO-AGC...
  • Page 11 CM-905S/SF TYPICAL SERVICE DATA CM-905S/SF SVC KEY & FUNCTION DESCRIPTION TV/TEXT LAST PR VOLUME PICTURE SIZE NORMAL ( 4:3 ) CHILD LOCK CH LOCK SUB MENU NAME FUNCTION PIP ON / OFF (PIP) ON/OFF display a sub-picture SWAP (PIP) The main picture and sub-picture are swapped SIZE (PIP) The sub-picture will be smaller.

  • Page 12: Schematic Diagram

    SCHEMATIC DIAGRAM - 11 -...

  • Page 13: Printed Circuit Board

    PRINTED CIRCUIT BOARD PCB MAIN - 12 -...

  • Page 14: Mechanical Exploded View And Parts List

    MECHANICAL EXPLODED VIEW AND PARTS LIST CAUTION 1. DTD-21D7 - 13 -...
  • Page 15 MECHANICAL EXPLODED VIEW AND PARTS LIST 2. DTD-21D6 - 14 -...
  • Page 16 MECHANICAL EXPLODED VIEW AND PARTS LIST 3. DTD-21D4 - 15 -...
  • Page 17 MECHANICAL EXPLODED VIEW AND PARTS LIST 4. DTD-21D3 - 16 -...
  • Page 18 MECHANICAL EXPLODED VIEW AND PARTS LIST 5. DTD-21U6 - 17 -...
  • Page 19 MECHANICAL EXPLODED VIEW AND PARTS LIST 6. DTD-21U8 - 18 -...

  • Page 20: Electrical Parts List

    ELECTRICAL PARTS LIST CAUTION “ ” is safety component, so it must be used the same component. “ ® ” is recomendable part for stock. PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK ZZ100 48B4844C07 R-44C07 (AA) TRANSMITTER REMOCON ZZ290 PTMPMSA686 PCB MAIN MANUAL AS DTD-14D3ME...
  • Page 21 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK 0000A 4857026900 HEAT SINK AL EX C825 CEXF1C102V C ELECTRO 16V RSS 1000MF (10X20) TP 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN C827 CEXF1E222V C ELECTRO 25V RSS 2200MF (16X25) TP IF01...
  • Page 22 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK C104 CEXF1H220V C ELECTRO 50V RSS 22MF (5X11) TP E041 4856310300 EYE LET BSR T0.2 (R1.6) C105 CCXB1H102K C CERA 50V B 1000PF K (TAPPING) E042 4856310300 EYE LET...
  • Page 23 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK C548 CEXF1C101V C ELECTRO 16V RSS 100MF (6.3X11) TP L601 58C0000096 COIL CHOKE 610G0233(470K) C550 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP L812 58C0000096 COIL CHOKE 610G0233(470K)
  • Page 24 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK D586 DUZ5R1B--- DIODE ZENER UZ-5.1B C525 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) D587 DUZ5R1B--- DIODE ZENER UZ-5.1B C532 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) D588 DUZ5R1B---...
  • Page 25 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK J071 RD-AZ101J- R CARBON FILM 1/6 100 OHM J J024 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J072 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J025 85801065GY WIRE COPPER...
  • Page 26 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK J122 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R113 RD-AZ392J- R CARBON FILM 1/6 3.9K OHM J J123 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R114 RD-AZ333J- R CARBON FILM...
  • Page 27 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK R525 RD-4Z111J- R CARBON FILM 1/4 110 OHM J R706 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R527 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R707 RD-AZ101J- R CARBON FILM...
  • Page 28 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK RF01 RD-AZ201J- R CARBON FILM 1/6 200 OHM J CP19 CCZF1H103Z C CERA 50V F 0.01MF Z RF02 RD-AZ221J- R CARBON FILM 1/6 220 OHM J CP24 CCZB1H820K C CERA...
  • Page 29 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK R915 RS01Y391J- R M-OXIDE FILM 1W 390 OHM J SCT1 4859303430 SOCKET CRT PCS633A ZZ200 PTCPJRA686 PCB CRT RADIAL AS DTD-14D3ME C902 CXCH1H120J C CERA 50V CH 12PF J (TAPPING) C904 CMXL2E104K C MYLAR 250V MEU 0.1MF K...

  • Page 30: Cm-905S/Sf Each Model Parts List

    Inch Different Part List Part_nm 14INCH 20INCH 21INCH 21INCH(Flat) C404 C Mylar 1.6KV BUP 7500PF J 1.6KV BUP 9100PF J 1.6KV BUP 8200PF J 1.6KV BUP 9100PF J Main Manul AS C408 C Mylar 200V PU 0.62MF J 200V PU 0.62MF J 200V PU 0.47MF J 200V PU 0.36MF J Main Manul AS...
  • Page 31 686, 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...

  • Page 32: Ic Description

    APPENDIX IC DESCRIPTION TB1251CN PAL/NTSC/SECAM 1CHIP ( IF + VCD PROCESSOR ) IC The TB1251N is a TV signal processor IC, which contains PIF, SIF, Video, Chroma and deflection signal processors for worldwide Multi-color systems. Also, it has V and EW geometric correction Outputs.
  • Page 33 APPENDIX IC DESCRIPTION TERMINAL INTERFACE PIN NAME FUNCTION INTERFACE IF VCC A Vcc terminal for the IF circuit. Supply 5V. RIPPLE A terminal should be connected to an internal FILTER bias filler. Put a capacilor. SIF OUT An output terminal for a 2’nd SIF signal, that is mixed down by a regenerated carrier.
  • Page 34 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE RF AGC An output terminal for RF AGC. A pull up resister is required because of its open collector output. A de-coupling capacitor is also connected to reduce noise. 1’st SIF IN An input terminal for 1’st SIF signal. IF AGC A terminal should be connceted to an IF AGC filter.
  • Page 35 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE CW OUT An output terminal for the continuous chroma sub-carrier frequency wave, with an amplitude of 0.7Vp-p (typ). Also the dc level shows chroma killer status, with a level of 3.5V for B/W and 1.5V for Color.
  • Page 36 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE IK IN An input terminal to sense AKB cathode current. Connect this terminals to GND if the AKB system is not being used. V RAMP A terminal should be connected wiht a capacitor to generate the V.Ramp signal. The V.Ramp amplitude is kept constant by the V.AGC.
  • Page 37 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE REF. R A terminal should be connected with resistance to stabilize internal current sources. Connect 5.6 1% resistance to GND. 6.8k ABCL IN An input terminal for ABL/ACL control. Control voltage range is 5.5~6.0V. The ratio of ABL versus ACL can be set by bus control.
  • Page 38 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE H OUT An output terminal for horizontal driving pulses. DIG GND A GND terminal for digital block. An input terminal for IICBUS clock. 3.25V An input/output terminal for IICBUS data. 3.25V BLACK DET A terminal should be connected with Black det.
  • Page 39 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE DIG.VDD A Vdd terminal for of digital block. Supply HVcc voltage through 270 ohms of H VCC resistance. The voltage of this terminal is clipped to approximately 3.3V by the internal regulator. 2.6V SYNC IN An input terminal for Sync signal.
  • Page 40 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE EW OUT An output terminal for E-W out. Y/C VCC An Vcc terminal for Y/C circuit. Supply 5V. C-IN An input terminal for chroma signal. (standard burst amplitude level 286mVp-p) The Iow/High impedance status of this pin can be read by bus to detect if S port is connceted or not.
  • Page 41 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE LOOP FILTER A terminal to be connected with loop filter for PIF PLL. The terminal voltage controls the PIF VCO frequency. 1.5k EHT IN The input terminal for EHT. The ratio of EW/V is controlled by bus. 3.5V De-Emphasis A terminal to De-Emphasis Audio signal, and...
  • Page 42 APPENDIX IC DESCRIPTION PIN NAME FUNCTION INTERFACE 52 DC NF A terminal for connect the capacitor for DC 53 VCO Bias Filter A terminal to be connected with a filler for PIF VCO. 1.5k 54 IF DET OUT Detected PIF output terminal. (typical output level 2.2Vp-p) 55 AFT OUT An output terminal for AFT.
  • Page 43 APPENDIX IC DESCRIPTION I701 SDA-55xx CMOS General • Feature selection via special function register • Simultaneous reception of TTX, VPS, PDC, and WSS (line 23) • Supply Voltage 2.5 and 3.3V • ROM version package P-SDIP 52, P-MQFP64 • Romless version package P-MQFP100, P-LCC84 P-SDIP-52 External Crystal and Programmable clock speed •...
  • Page 44 APPENDIX IC DESCRIPTION Memory • Non-multiplexed 8-bit data and 16 ... 20-bit address bus (ROMless Version) • Memory banking up to 1Mbyte (Romless version) • Up to 128 Kilobyte on Chip Program ROM • Eight 16-bit data pointer registers (DPTR) •...
  • Page 45 APPENDIX IC DESCRIPTION Acquisition Features • Multistandard Digital Data Slicer • Parallel Multi-norm Slicing (TTX, VPS, WSS, CC, G+) • Four Different Framing Codes Available • Data Caption only Limited by available Memory • Programmable VBL-buffer • Full Channel Data Slicing Supported •...
  • Page 46 APPENDIX IC DESCRIPTION Pin Configuration P-SDIP-52 (ROM Version) (top view) P-SDIP-52 (ROM Version of SDA 55xx) - 15 -...
  • Page 47 APPENDIX IC DESCRIPTION Port Alternate functions Alternate Alternate Default Port Function 2 Function 3 function Toggle Function Toggle Function Control bit Function Control bit Function P0(0...7) I/O Port pin P1(0) I/O Port pin PWME(E0) PWM 8 bit channel 0 P1(1) I/O Port pin PWME(E1) PWM 8 bit channel 1...
  • Page 48 APPENDIX IC DESCRIPTION SDA-9488X (PIP IC) Block Diagram - 17 -...

  • Page 49: Pin Configuration

    APPENDIX IC DESCRIPTION Pin Configuration Numb Name Type Description crystal oscillator (input) or external clock input crystal oscillator (out put) I/TTL horizontal sync for parent channel I/TTL vertical sync for parent channel C-bus data C-bus clock digital supply voltage digital ground C Address O/TTL interrupt...

  • Page 50: Trouble Shooting Charts

    APPENDIX TROUBLE SHOOTING CHARTS CAUTION 1. NO RASTER CHECK MAIN B+(123V) NORMAL ABNORML CHECK Heater Voltage CHECK VOLTAGE VIDEO B+(220V) LINE OF C805(180uF) 27V & 12V 295Vdc AT AC 220V NORMAL NORMAL ABNORML ABNORML CHECK / REPLACE CHECK Horizontal drive CHECK /REPLACE I801 pluse AT PIN 32 OF I501...
  • Page 51 APPENDIX TROUBLE SHOOTING CHARTS 2. NO PICTURE (RASTER OK) CHECK SIGNAL AT PIN 39 OF I501 NORMAL ABNORML CHECK SIGNAL AT PIN CHANGE INPUT MODE 22,23,24 OF I501 RF -> AV -> RF NORMAL ABNORML CHECK SIGNAL CHECK VOLTAGE AT PIN IF OF TUNER 14 OF I501 ABNORML...
  • Page 52 APPENDIX TROUBLE SHOOTING CHARTS 3. NO COLOR CHECK SIGNAL AT PIN 43 OF I501 ABNORMAL NORMAL CHECK SIGNAL AT PIN CHECK SYSTEM MODE 3 OF I571 AUTO -> PAL -> SECAM ABNORMAL CHECK SIGNAL AT PIN CHECK / REPLACE 20,21,22 OF I501 Q203,Q201,D201 Q202,D202 ABNORMAL...
  • Page 53 APPENDIX TROUBLE SHOOTING CHARTS 4. NO PIP PICTURE & NO ON-SCREEN DISPLAY(PICTURE OK) 4-1. NO PIP PICTURE (MAIN PICTURE OK) CHECK SIGNAL AT P904 TV,AV,AV2(SIGNAL) ABNORMAL NORMAL CHECK SIGNAL AT CHECK SIGNAL AT P904 Q808,JP01,JP02 HORI & VERTI SYNC ABNORMAL NORMAL CHECK / REPLACE CHECK 9V LINE &...
  • Page 54 APPENDIX TROUBLE SHOOTING CHARTS 4-2. NO ON-SCREEN DISPLAY (PICTURE OK) CHECK SIGNAL AT PIN 38,39,40,41 OF I701 (OSD & TEXT SIGNAL) CHECK SIGNAL AT PIN 19,20 (HORI. & VERTI, ABNORMAL SYNC) OF I701 NORMAL CHECK SIGNAL AT PIN 15,16,17,18 OF I501 (OSD &...
  • Page 55 APPENDIX TROUBLE SHOOTING CHARTS 5. NO MAIN SOUND (PICTURE OK) CHECK VOLTAGE AT PIN OF I601 ABNORMAL NORMAL CHECK SIGNAL AT PIN CHECK / REPLACE 1,2,14,15 OF I601 D817,L601 NORMAL ABNORMAL CHECK SIGNAL AT PIN CHECK / REPLACE 4,12 OF I601 P602A,P602B NORMAL ABNORMAL...
  • Page 56 APPENDIX TROUBLE SHOOTING CHARTS 6. NO EXTERNAL A/V (RF OK) CHECK EXTERNAL AUDIO & VIDEO SIGNAL I602,I571 ABNORMAL NORMAL CHECK SIGNAL AT PIN CHECK RCA & CHECK / REPLACE 1,28,30,32 OF I602 SCART JACK I571 ABNORMAL NORMAL CHECK / REPLACE CHECK / REPLACE I602 I701...

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