DAEWOO DTD-29M1 MEO, DTD-29M2 MEO, DTD-29G1 MEO, DTD-29G4 MEO, DTD-29G5 MEO 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 PIP
MEO O O
MTO O X
MPO X O
MZO X X
DAEWOO ELECTRONICS CO., LTD
http : //svc.dwe.co.kr J un .2001
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 ............................................................................................... 20
CM-905 EACH MODEL PARTS LIST ................................................................................ 31
APPENDIX (“Appendix is provided only by internet [http://svc.dwe.co.kr]”)
IC DESCRIPTION .............................................................................................................. 1
TROUBLE SHOOTING CHARTS ...................................................................................... 14
- 1 -
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 75 Ohm Unbalanced. (DIN Standard)
Tuning System FS Tuning System
Memory Channel 100 Channels
Remocon Control R-44C07
Reception Channel VHF - BAND1 : CH2 - CH4
BAND2 : CH5 - CH12
CABLE BAND : S1’ - S3, S1 - S20
HYPER BAND : S21 - S41
UHF-BAND 4,5 : CH21 - CH69
Remark OSD ( GUI Format )
TELETEXT ( Top & Flop Teletext )
PIP ( AV PIP, Swap, Size, Position )
Digital Eye
- 2 -
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 hazardous X-RAY RADIATION. To avoid such hazards, the
high voltage must not exceed the specified limit. The
nominal value of the high voltage of this receiver is
29kV(29”) at max beam current. The high voltage must
not, under any circumstances, exceed 30.5kV(29”).
Each time a receiver requires servicing, the high voltage should be checked. It is recommended the reading
SAFETY PRECAUTIONS
1. Potentials of high voltage are present when this
receiver is operating. Operation of the receiver outside
the cabinet or with the back cover removed involves a
shock hazard from the receiver.
1) Servicing should not be attempted by anyone who is
not thoroughly familiar with the precautions necessary
when working on high voltage equipment.
2) Always discharge the picture tube to avoid the shock
harzard before removing the anode cap.
3) 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.
of the high voltage recorded as a part of the service
recorded as a part of the service records. It is important
to use an accurate and reliable high voltage meter.
2. The only source of X-RAY RADIATION in this TV
receiver is the picture tube. For continuous RADIATION
protection, the replacement tube must be exactly the
same type tube as specified in the “PART LIST”.
2. If any FUSE in this TV receiver is blown, replace it will
the FUSE specified in the “PART LIST”.
3. When replacing a high wattage resistor (oxide metal
film resistor) in circuit board, keep the resistor 10mm
away from circuit board.
4. Keep wires away from high voltage or high temperature
components.
5. This receiver must operate between AC 100~240 volts,
50/60Hz. NEVER connect to DC supply or any other
power or frequency.
PRODUCT SAFETY
Many electrical and mechanical parts in this chassis have
special safety-related characteristics.
These characteristics are often passed unnoticed by a
visual inspection and the X-RAY RADIATION protection
afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage,
etc.
Replacement parts which have these special safety characteristics are identified in this manual and its supple-
ments, electrical components having such features are
identified by designated symbol on the “PART LIST”.
Before replacing any of these components, read the “PART
LIST” in this manual carefully.
The use of substitute replacement part which do not have
the same safety characteristics as specified in the “PART
LIST” may created X-RAY RADIATION.
- 3 -
CIRCUIT BLOCK DIAGRAM
CAUTION
- 4 -
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” using the Vol-Up Key.
2. SCREEN ADJUSTMENT
1) Pattern : PAL B/G Retma
2) Press the NORMAL Key to set the “NORMAL 1” mode.
3) Press the S2 Key of Service Remocon.
4) Adjust the SCREEN VOLUME on FBT so that the horizontal line reach the cut-off point.
3. FOCUS ADJUSTMENT
1) Pattern : PAL B/G Retma
2) Adjust the FOCUS VOLUME on FBT to obtain clear resolution.
4. WHITE BALANCE ADJUSTMENT
1) Press the NORMAL Key to set the “NORMAL 1” mode.
2) Press the S8 Key of Service Remocon to enter the “WHITE BALANCE” mode.
3) Adjust the each color ( R,G,B ) which appears abnormally on the screen.
5. GEOMETRIC ADJUSTMENT
1) Press the NORMAL Key to set the “NORMAL 1” mode.
2) Press the S6 Key of Service Remocon to enter the “GEOMETRIC” mode.
5-1. VERTICAL CENTER ADJUSTMENT
1) Pattern : PAL B/G Retma
2) Choose the “V-CENTER” using the Pr-Up/Down Keys.
3) Adjust the horizontal line of picture to coincide with the mechanical center marks of the CRT using the
Vol-Up/Down Keys.
If the pattern is smaller than the screen, adjust the V-size to fit.
*
5-2. VERTICAL SIZE ADJUSTMENT
1) Pattern : PAL B/G Retma
2) Choose the “V-SIZE” using the Pr-Up/Down Keys.
3) Adjust the vertical size of the picture using the Vol-Up/Down Keys.
- 5 -
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. HORIZONTAL SIZE ADJUSTMENT
1) Pattern : PAL B/G Retma
2) Choose the “H-SIZE” using the Pr-Up/Down Keys.
3) Set each side over scan to be 10% using the Vol-up/Down Keys.
5-5. PINCUSHION ADJUSTMENT
1) Pattern : PAL B/G Crosshatch
2) Choose the “PARABOLA” using the Pr-Up/Down Keys.
Adjust parabola width to fit on screen.
3) Choose the “CONER” using the Pr-Up/Down Keys.
Adjust coner parabola to fit on screen.
4) Choose the “TRAPEZIUM” using the Pr-Up/Down Keys,
Adjust trapezium to fit on screen.
5-6. S-CORRECTION ADJUSTMENT
1) Pattern : PAL B/G Crosshatch
2) Choose the “S-CORRECTION” using the Pr-Up/Down Keys.
3) Adjust each distance of horizontal line to be the same using the Vol-Up/Down Keys.
5-7. SUB-BRIGHTNESS ADJUSTMENT
1) Pattern : PAL B/G Retma
2) Press the NORMAL Keys to set the “NORMAL 1” mode.
3) Adjust the Brightness so that the second line of top appears, as follow.
- 6 -
6. REMOCON
6-1. SERVICE REMOCON 6-2. USER REMOCON
ALIGNMENT INSTRUCTIONS
RECALL
S1 S2 S3
S4 S5 S6
S7 S8 S9
S10 S12
TV/CATV
SOUND MODE
PIP M/S
POSITION
TV/VIDEO
VPOSITION
3456
7
R-34SVC
POWER
MUTE
S11
TV/VIDEO
ADD/ERASE
NOISE CLEAR
SURROUND
CH
MENU
CH
PAUSE/
CH VOL
STILL
SIZE SLEEP
1
890
VOLVOL
2
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
- 7 -
CM-905 TYPICAL SERVICE DATA
CAUTION
CM-905 SVC KEY & FUNCTION DESCRIPTION
EY N NAME RFUNCTION
HEATRUN MODE
S1
S2
S3
S4
S5
S6 PARABORA 22 40 27
S7
SCREEN
ADJUSTMENT
SOUND TEST
PICTURE TEST
NORMAL1
NAME
V-CENTER 03 05 04
V-SIZE 28 42 27
H-CENTER 13 13 14
H-SIZE 44 41 58
TRAPEZIUM 17 16 15
CORNER 04 05 05
H-EHT 03 03 03
S-CORRECTION 08 08 07
V-LINEARITY 10 09 09
V-EHT 03 03 03
PIP
R 180 180 128
G 180 180 128
B 180 180 128
PRESS THE S1 ONE TINE ----> PRESS THE S1 ANOTHER TIME
(HEATRUN MODE) (NORMAL OPRATION)
FBT SCREEN ADJUSTMENT
*
PRESS THE S2 ON TIME ----> PRESS THE S2 ANOTHER TIME
(HORIZONTAL KINE) (NORMAL OPRATION)
SOUND TEST
*
PRESS THE S3 KEY IS TOGGLE
VOLUME 00 ----> VOLUME 32 ----> VOLUME 63--->
BALANS LEFT ----> BALANS RIGHT ----> BALANS 00 ----> RELEASE
PICTURE TEST
*
PRESS THE S4 KEY IS TOGGLE
CONTRAST 00 ----> CONTRASR 32 ----> CONTRAST 63 ---->
RRIGHT 00 ----> BRIGHT 32 ----> BRIGHT 63 ---->
COLOR 00 ----> COLOR 32 ----> COLOR 63 ----> RELEASE
ADJUST NORMAL1 DATA INITIAL DATA
*
CONTRAST 63 63
RRIGHT 32 32
COLOR 32 32
SHARPNESS 32 32
ADJUST GEOMETRY DATA
*
50 Hz (29”) NORMAL 50 Hz (25”) NORMAL INITIAL DATA(50Hz)
ADJUST PIP DATA
*
29” 25”
ON/OFF
ON/OFF
Line Production
Line Production
INITIAL DATA
- 8 -
CM-905S/SF TYPICAL SERVICE DATA
CM-905 SVC KEY & FUNCTION DESCRIPTION
WHITE BALANCE
RB R LOW BEAM ADJUSTMENT 128
S8
S9
S10
S11
POWER-ON-START ON/OFF ON
S12
COLOR SYSTEM PAL
SOUND SYSTEM BG
GB G LOW BEAM ADJUSTMENT 0
BB B LOW BEAM ADJUSTMENT 0
GG G HIGH BEAM ADJUSTMENT 64
BG B HIGH BEAM ADJUSTMENT 32
SUB-BRIGHT ADJUST BRIGHTNESS DATA 15
SUB-CONTRAST ADJUST SUB CONTRAST DATA 15
AGC TUNER AGC VOLTAGE 3.5Vdc
AUTO-AGC
DATA 32
TEXT ARABIC/CYRILLIC/IRANIAN/EAST-LATIN//WEST-LATIN ARABIC
DIGITAL EYE ON/OFF ON
PICTURE NORMAL 1
BLUE SCREEN ON
CLOCK
ON TIMER
ON TIMER
ON/OFF
ON PR 1
OFF TIMER
OFF TIMER
ON/OFF
LANGUAGE ENGLISH
SOUND MODE MEMORY
NAME(EACH PR) ----
TV/AV1/AV2 TV
TV/TEXT TV
LAST PR 1
VOLUME 20
PICTURE SIZE NORMAL (4:3)
ADJUST WHITE BALANCE DATA
*
MAIN RF AGC ADJUSTMENT KEY
*
OPTION MODE ADJUSTMENT KEY INITIAL DATA
*
OUT DATA
*
OFF
OFF
- 9 -
CM-905S/SF TYPICAL SERVICE DATA
CM-905 SVC KEY & FUNCTION DESCRIPTION
S12
CHILD LOCK OFF
CH LOCK OFF
SUB MENU
NO NAME RFUNCTION IITIAL DATA
1 PIP ON / OFF (PIP) PIP ON/OFF display a sub-picture OFF
2 SWAP (PIP) M/S The main picture and sub-picture are swapped
3 SIZE (PIP) To return to be normal size, Press this button
4 TV / VIDEO (PIP) TV/VIDEO To select the input for the sub pictrue
5 POSITION (PIP) POSITION The display position of the sub-picture will changed
6 SCREEN V-POSITION BB 0 0
SERVICE
REMOCON
NAME
The sub-picture will be smaller.
PAUSE/
STILL
again.
S2 DATA changed
RB 128 128
GB 0 0
GG 64 64
BG 64 64
Brightness 32 32
DIGITAL EYE
7
8 ZOOM SIZE Picture size changed ( 4:3 -> 16:9 -> ZOOM -> 4:3 ->)
9 TEXT SLEEP TEXT funtion ON/OFF
10 CH UP CH
11 CH DOWN CH
12 RESISTER VOL
13 RELEASE VOL
V-POSITION
DIGITAL EYE funtion ON/OFF
USING the SERVICE MODE to Channel UP/DOWN
USING the FACTIRY KEY
- 10 -
SCHEMATIC DIAGRAM
- 11 -
PRINTED CIRCUIT BOARD
PCB MAIN
- 12 -
- 13 -
PRINTED CIRCUIT BOARD
- 14 -
PRINTED CIRCUIT BOARD
- 15 -
SCHEMATIC DIAGRAM
- 16 -
PRINTED CIRCUIT BOARD
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