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Service Manual
Colour Television
CHASSIS : CM-905
Model
:
DTD-29M1/M2/G1/G4/G5 MEO
29M1/M2/G1/G4/G5 MTO
29M1/M2/G1/G4/G5 MPO
29M1/M2/G1/G4/G5 MZO
25G1/G4/G5 ME
25G1/G4/G5 MT
25G1/G4/G5 MP
25G1/G4/G5 MZ
MODEL OIPTION LIST
MODEL
MEO
MTO
MPO
MZO
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr
S/M No. : TCM905BEF0
TEXT
PIP
O
O
O
X
X
O
X
X
J un .2001
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Table of Contents
Related Manuals for Daewoo DTD-29M1 MEO
Summary of Contents for Daewoo DTD-29M1 MEO
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Page 1: Service Manual
S/M No. : TCM905BEF0 Service Manual Colour Television CHASSIS : CM-905 Model DTD-29M1/M2/G1/G4/G5 MEO 29M1/M2/G1/G4/G5 MTO 29M1/M2/G1/G4/G5 MPO 29M1/M2/G1/G4/G5 MZO 25G1/G4/G5 ME 25G1/G4/G5 MT 25G1/G4/G5 MP 25G1/G4/G5 MZ MODEL OIPTION LIST MODEL TEXT DAEWOO ELECTRONICS CO., LTD http : //svc.dwe.co.kr J un .2001... -
Page 2: Table Of Contents
TABLE OF CONTENTS SPECIFICATIONS ......................2 SAFETY INSTRUCTION ....................3 CIRCUIT BLOCK DIAGRAM ..................... 4 ALIGNMENT INSTRUCTIONS ..................5 CM-905 TYPICAL SERVICE DATA ..................8 SCHEMATIC DIAGRAM ..................... 11 PRINTED CIRCUIT BOARD ....................12 MECHANICAL EXPLODED VIEW AND PARTS LIST ............18 ELECTRICAL PARTS LIST .................... -
Page 3: Specifications
SPECIFICATIONS CAUTION Items Model DTD- 29M1/M2/G1/G4/G5 MEO 29M1/M2/G1/G4/G5 MTO 29M1/M2/G1/G4/G5 MPO 29M1/M2/G1/G4/G5 MZO 25G1/G4/G5 ME 25G1/G4/G5 MT 25G1/G4/G5 MP 25G1/G4/G5 MZ TV Standards PAL-SECAM-B/G,D/K,I,NTSC-M,NTSC-4.43(AV) Mains Voltage AC 110~250V, 50/60Hz Power Consumption 130Watts Sound Ouput 7Watts + 7Watts Over (80% MOD.at 1KHz THD.10%) Speaker 12W 8 Ohm (2 pcs) Antenna... -
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...
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Page 9: Cm-905 Typical Service Data
CM-905 TYPICAL SERVICE DATA CAUTION CM-905 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-905 SVC KEY & FUNCTION DESCRIPTION WHITE BALANCE * ADJUST WHITE BALANCE DATA R LOW BEAM ADJUSTMENT G LOW BEAM ADJUSTMENT B LOW BEAM ADJUSTMENT G HIGH BEAM ADJUSTMENT B HIGH BEAM ADJUSTMENT SUB-BRIGHT ADJUST BRIGHTNESS DATA SUB-CONTRAST ADJUST SUB CONTRAST DATA * MAIN RF AGC ADJUSTMENT KEY...
- Page 11 CM-905S/SF TYPICAL SERVICE DATA CM-905 SVC KEY & FUNCTION DESCRIPTION CHILD LOCK CH LOCK SUB MENU SERVICE NAME RFUNCTION IITIAL DATA REMOCON NAME PIP ON / OFF (PIP) ON/OFF display a sub-picture SWAP (PIP) The main picture and sub-picture are swapped The sub-picture will be smaller.
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Page 12: Schematic Diagram
SCHEMATIC DIAGRAM - 11 -... -
Page 13: Printed Circuit Board
PRINTED CIRCUIT BOARD PCB MAIN - 12 -... - Page 14 PRINTED CIRCUIT BOARD - 13 -...
- Page 15 PRINTED CIRCUIT BOARD - 14 -...
- Page 16 SCHEMATIC DIAGRAM - 15 -...
- Page 17 PRINTED CIRCUIT BOARD - 16 -...
- Page 18 PRINTED CIRCUIT BOARD - 17 -...
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Page 19: Mechanical Exploded View And Parts List
MECHANICAL EXPLODED VIEW AND PARTS LIST CAUTION 1. DTD-25G1 - 18 -... - Page 20 MECHANICAL EXPLODED VIEW AND PARTS LIST 2. DTD-29M2MEO - 19 -...
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Page 21: Electrical Parts List
ELECTRICAL PARTS LIST LOC PART CODE PART NAME DECSCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK ZZ100 48B4844C07 R-44C07 (AA) SP01 4858311110 SPEAKER 12W 8 OHM SP-58126F TRANSMITTER REMOCON ZZ110 PTACPWD405 ACCESSORY AS DTD-29M2MEO SP02 4858311110 SPEAKER 12W 8 OHM SP-58126F 4850Q00810 BATTERY R6P/LN... - Page 22 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK I804 1LP295033- IC REGULATOR LP2950 3.3V Z204 5PYXT6R5MB FILTER CERA XT 6.5MB Z501 5PXLT6R5MH FILTER CERA LT 6.5MH I805 PTH2SW6900 HEAT SINK ASS`Y 1KA7805--- + 7174301011 Z801 DSVC471D14 VARISTOR...
- Page 23 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK N012 4857417500 TERM PIN DA-IB0214(D2.3/DY PIN) E022 4856310300 EYE LET BSR T0.2 (R1.6) P602 485923172S CONN WAFER YW025-04 (STICK) E023 4856310300 EYE LET BSR T0.2 (R1.6) P603 485923182S CONN WAFER...
- Page 24 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK C507 CMXM2A222J C MYLAR 100V 2200PF J (TP) C628 CEXF1H100V C ELECTRO 50V RSS 10MF (5X11) TP C508 CXCH1H100D C CERA 50V CH 10PF D (TAPPING) C702 CEXF1E470V C ELECTRO...
- Page 25 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK R318 RN02B271JS R METAL FILM 2W 270 OHM J SMALL C822 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z R403 RN01B272JS R METAL FILM 1W 2.7K OHM J SMALL C826 CBZF1H104Z...
- Page 26 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK J006 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J061 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J007 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J062 85801065GY WIRE COPPER...
- Page 27 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK L504 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) J120 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING L505 5CPZ100K02 COIL PEAKING 10UH K (AXIAL 3.5MM) J121 85801065GY WIRE COPPER...
- Page 28 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK R304 RD-AZ683J- R CARBON FILM 1/6 68K OHM J R535 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R305 RD-AZ363J- R CARBON FILM 1/6 36K OHM J R581 RD-AZ750J- R CARBON FILM...
- Page 29 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK LOC PART CODE PART NAME DECSCRIPTION REMARK R713 RD-AZ102J- R CARBON FILM 1/6 1K OHM J C908 4SG0D00103 SPARK GAP S-23 900V-1.5KV R714 RD-AZ102J- R CARBON FILM 1/6 1K OHM J C909 4SG0D00103 SPARK GAP...
- Page 30 ELECTRICAL PARTS LIST LOC PART CODE PART NAME DECSCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK CF01 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) IP01 1SDA9488XE IC CHIP PIP SDA9488X D901 D1N4148--- DIODE 1N4148 (TAPPING) ZZ200 PTPMJRD405 PCB PIP RADIAL AS DTD-29M2MEO D903 D1N4148---...
- Page 31 ELECTRICAL PARTS LIST PART CODE PART NAME DESCRIPTION REMARK RP07 RD-AZ101J- R CARBON FILM 1/6 100 OHM J RP08 RD-AZ101J- R CARBON FILM 1/6 100 OHM J RP09 RD-AZ101J- R CARBON FILM 1/6 100 OHM J RP10 RD-AZ151J- R CARBON FILM 1/6 150 OHM J RP11 RD-AZ151J-...
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Page 32: Cm-905 Each Model Parts List
CM-905 EACH MODEL PARTS LIST CAUTION - 31 -... - Page 33 CM-905 EACH MODEL PARTS LIST - 32 -...
- Page 34 CM-905S EACH MODEL PARTS LIST - 33 -...
- Page 35 686, 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...
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Page 36: Ic Description
APPENDIX IC DESCRIPTION SDA-55XX ( Micro-controller & Teletext Decoder) Feature 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 P-SDIP-52 •... -
Page 37: Acquisition Features
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 VBI-buffer • Full Channel Data Slicing Supported •... - Page 38 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 39 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 40 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 41 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 42 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 43 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 44 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 45 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 46 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 47 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 48 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.
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Page 49: Trouble Shooting Charts
APPENDIX TROUBLE SHOOTING CHARTS CAUTION 1. NO RASTER CHECK MAIN B+(132V) NORMAL ABNORML CHECK Heater Voltage CHECK VOLTAGE VIDEO B+(220V) LINE OF C805(470uF) 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 50 APPENDIX TROUBLE SHOOTING CHARTS 2. NO OICTHRE (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 51 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 Q205,D202 CHECK / REPLACE...
- Page 52 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 Q205,JP01,JP02 HORI & VERTI SYNC ABNORMAL NORMAL CHECK 9V LINE &...
- Page 53 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 54 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 P604, P603 NORMAL ABNORMAL...