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DTD-21H9
Service Manual
46 pgs2.41 Mb0

DAEWOO DTD-21H9 Service Manual

http : //svc.dwe.co.kr
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 Corp.
Jan. 2005
COLOR TELEVISION CHASSIS : CP-093F
MODEL : DTD-21H9
SM No :TCP093FEF0
CP-093F Service Manual
CONTENTS
1. MAIN FEATURES 2
1.1 SPECIFICATIONS 2
1.1.1 GENERAL 2
1.1.2 EURO-SCART 1(21Pin) 3
1.1.3 CHANNEL/FREQUENCY TABLE 4
2. SAFETY INSTRUCTION 7
3. ALIGNMENT INSTRUCTIONS 8
3.1 MICROCONTROLLER CONFIGURATION:SERVICE MODE 8
3.2 SERVICE MODE NADVIGATION 8
3.3 MICROCONTROLLER CONFIGURATION:OPTION BITS 8
3.4 OPTION 1 9
3.5 OPTION 2 9
3.6 NVM default setting 10
4. TV SET ALIGNMENT 12
4.1 G2 ALIGNMENT 12
4.2 WHITE BALANCE 12
4.3 FOCUS 12
4.4 VERTICAL GEOMETRY 12
4.5 HORIZONTAL PICTURE CENTRING 12
4.6 EAST/WEST CORRECTION 12
4.7 AGC 13
5 IC DESCRIPTION 14
5.1 UOC
///
Series 14
5.1.1 IC MARKING AND VERSION 14
5.1.2 BLOCK DIAGRAM 15
5.1.3 PINNING 16
5.1.4 FEATURES 17
5.2 TDA8944J STEREO AUDIO AMPLIFIER 22
5.2.1 FEATURES 23
5.3 TDA8357J VERTICAL AMPLIFIER 25
5.3.1 TDA8357J 25
5.4 TDA6107AJE 28
5.4.1 Features 28
5.4.2 Pin description 28
5.5 24WC16-16KB EEPROM 29
5.6 STR-F6756/4 30
5..6.1 Functions of Each Terminal 30
5..6.2 Block Diagram(Connection diagram) 30
5..6.3 CONTROL PART - ELECTRICAL CHARACTERISTICS 33
6. SPECIFICATIONS 34
7. SERVICE PARTS LIST 37
8. EXPLODED VIEW 51
9. SCHEMATIC DIAGRAM 55
1. MAIN FEATURES
2
1.1 SPECIFICATIONS
1.1.1 GENERAL
TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L’
Sound system NICAM B/G, I, D/K, L, Power
consumption 21” : 74W Sound Output Power 20” : 3W x 2 (at 60% mod, 10%THD) Speaker
Teletext system 10 pages memory FASTEXT (FLOF or TOP) Aerial input 75 ohm unbalanced Channel coverage Off-air channels, S-cable channels and hyperband Tuning system frequency synthesiser tuning system Visual screen size
Channel indication On Screen Display Program Selection 100 programmes Aux. terminal - EURO-SCART : Audio / Video In and Out, R/G/B
CP-093F Service Manual
Tuner PAL, SECAMColour system AV PAL, SECAM, PAL 60, NTSC M, NTSC 4.43
FM 2Carrier B/G, D/K
21” : 5W 8 ohm x2 is not connected)
21” : 51cm
In, Slow and Fast switching.
Remote Control Unit
- Headphone jack on front of cabinet (21”)
- AV2 : Video and Audio L/R out, Headphone jack at side of cabinet. R-52C03
CP-093F Service Manual
3
1.1.2 EURO-SCART 1 (21 Pin) Pin Signal Description Matching value
1 Audio Output Right 0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod ) 2 Audio Input Right 0.5 Vrms, Impedance > 10 kΩ 3 Audio Output Left 0.5 Vrms, Impedance < 1 kΩ, ( RF 54% Mod ) 4 Audio Earth
5 Blue Earth 6 Audio Input Left 0.5 Vrms, Impedance > 10 kΩ 7 Blue Input 0.7 Vpp ±0.1V, Impedance 75Ω 8 Slow Switching TV : 0 to 2V, AV 16/9 : 4.5 to 7V, AV 4/3 : 9.5 to 12V , Impedance
> 10 kΩ
9 Green Earth 10 N.C. 11 Green Input 0.7 Vpp ± 0.1V, Impedance 75Ω 12 N.C. 13 Red Earth 14 Blanking Earth 15 Red Input
16 Fast Switching 0 to 0.4V : Logic “0”, 1 to 3V : Logic “1”, Impedance 75Ω 17 Video Out Earth
18 Video In Earth 19 Video Output
20 Video Input 1 Vpp ± 3dB, Impedance 75Ω 21 Common Earth
0.7 Vpp ± 0.1V, Impedance 75Ω
1 Vpp ± 3dB, Impedance 75Ω
CP-093F Service Manual
4
1.2 CHANNEL/FREQUENCY TABLE
CHANNEL EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT
C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45
46.25 - 45.75 49.75
48.25 55.75 (L') 53.75 59.25
55.25 60.5 (L') 61.75 77.25
62.25 63.75 (L') 175.25 85.25
175.25 176.00 183.25 93.25
182.25 184.00 191.25 175.25
189.25 192.00 199.25 183.25
196.25 200.00 207.25 191.25
203.25 208.00 215.25 199.25
210.25 216.00 223.25 207.25
217.25 189.25 (LUX) 231.25 215.25
224.25 69.25 (L') 239.25 223.25
53.75 76.25 (L') 247.25 -
- 83.25 (L') 49.75 -
82.25 90.25 57.75 -
- 97.25 65.75 -
183.75 - 77.75 -
192.25 - 85.75 -
201.25 - - -
- - - -
471.25 471.25 471.25 471.25
479.25 479.25 479.25 479.25
487.25 487.25 487.25 487.25
495.25 495.25 495.25 495.25
503.25 503.25 503.25 503.25
511.25 511.25 511.25 511.25
519.25 519.25 519.25 519.25
527.25 527.25 527.25 527.25
535.25 535.25 535.25 535.25
543.25 543.25 543.25 543.25
551.25 551.25 551.25 551.25
559.25 559.25 559.25 559.25
567.25 567.25 567.25 567.25
575.25 575.25 575.25 575.25
583.25 583.25 583.25 583.25
591.25 591.25 591.25 591.25
599.25 599.25 599.25 599.25
607.25 607.25 607.25 607.25
615.25 615.25 615.25 615.25
623.25 623.25 623.25 623.25
631.25 631.25 631.25 631.25
639.25 639.25 639.25 639.25
647.25 647.25 647.25 647.25
655.25 655.25 655.25 655.25
663.25 663.25 663.25 663.25
CP-093/F Service Manual
5
C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C72 C73 C74 C75 C76 C77 S01 S02 S03 S04 S05 S06 S07 S08 S09 S10 S11 S12 S13 S14 S15 S16 S17
671.25 671.25 671.25 671.25
679.25 679.25 679.25 679.25
687.25 687.25 687.25 687.25
695.25 695.25 695.25 695.25
703.25 703.25 703.25 703.25
711.25 711.25 711.25 711.25
719.25 719.25 719.25 719.25
727.25 727.25 727.25 727.25
735.25 735.25 735.25 735.25
743.25 743.25 743.25 743.25
751.25 751.25 751.25 751.25
759.25 759.25 759.25 759.25
767.25 767.25 767.25 767.25
775.25 775.25 775.25 775.25
783.25 783.25 783.25 783.25
791.25 791.25 791.25 791.25
799.25 799.25 799.25 799.25
807.25 807.25 807.25 807.25
815.25 815.25 815.25 815.25
823.25 823.25 823.25 823.25
831.25 831.25 831.25 831.25
839.25 839.25 839.25 839.25
847.25 847.25 847.25 847.25
855.25 855.25 855.25 855.25
863.25 863.25 863.25 863.25
69.25 - - -
76.25 - - -
83.25 - - -
90.25 - - -
97.25 - - -
59.25 - - -
93.25 - - -
105.25 104.75 103.25 105.25
112.25 116.75 111.25 112.25
119.25 128.75 119.25 119.25
126.25 140.75 127.25 126.25
133.25 152.75 135.25 133.25
140.25 164.75 143.25 140.25
147.25 176.75 151.25 147.25
154.25 188.75 159.25 154.25
161.25 200.75 167.25 161.25
168.25 212.75 - 168.25
231.25 224.75 - 231.25
238.25 236.75 - 238.25
245.25 248.75 255.25 245.25
252.25 260.75 263.25 252.25
259.25 272.75 271.25 259.25
266.25 284.75 279.25 266.25
273.25 296.75 287.25 273.25
CP-093F Service Manual
6
S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38 S39 S40 S41
280.25 136.00 295.25 280.25
287.25 160.00 303.25 287.25
294.25 - - 294.25
303.25 303.25 - 303.25
311.25 311.25 311.25 311.25
319.25 319.25 319.25 319.25
327.25 327.25 327.25 327.25
335.25 335.25 335.25 335.25
343.25 343.25 343.25 343.25
351.25 351.25 351.25 351.25
359.25 359.25 359.25 359.25
367.25 367.25 367.25 367.25
375.25 375.25 375.25 375.25
383.25 383.25 383.25 383.25
391.25 391.25 391.25 391.25
399.25 399.25 399.25 399.25
407.25 407.25 407.25 407.25
415.25 415.25 415.25 415.25
423.25 423.25 423.25 423.25
431.25 431.25 431.25 431.25
439.25 439.25 439.25 439.25
447.25 447.25 447.25 447.25
455.25 455.25 455.25 455.25
463.25 463.25 463.25 463.25
CP-093F Service Manual
7
2. 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 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 25-26 KV (20 ”-21”) or 26 KV (25” - 28 ”) at max beam current. The high voltage must not, under any circumstances, exceed 27.5 KV (20 ”), 29KV (21”), 29.5 KV (25") or 30 KV (28"). Each time a receiver requires servicing, the high voltage should be checked. 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 continued
X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as specified in the parts list.
SAFETY PRECAUTION
Potentials of high voltage are present when this receiver is operating. Operation of the receiver outside the cabinet or with the back board removed involves a shock hazard from the receiver. Servicing should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment. 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. If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement Parts List. When replacing a high wattage resistor (metal oxide film resistor) in the circuit board, keep the resistor 10 mm away from circuit board. Keep wires away from high voltage or high temperature components. This receiver must operate under AC 230 volts, 50 Hz. NEVER connect to a DC supply or any other voltage or frequency.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this equipment 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 supplements, electrical components having such features are identified by designated symbol on the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitutes replacement parts which do not have the same safety characteristics as specified in the parts list may create X-RAY Radiation.
CP-093F Service Manual
8
3. ALIGNMENT INSTRUCTIONS
3.1 MICROCONTROLLER CONFIGURATION : SERVICE MODE
To switch the TV set into service mode please see instruction below. 1 - Select PR. number 91
2 - Adjust sharpness to minimum and exit all menus. 3 – Within 2 seconds press the key sequence : RED - GREEN - menu
The software version is displayed beside the word Service, e.g. “SERVICE VER 00.05”. To exit SERVICE menu press menu key or Std By key.
3.2 SERVICE MODE NAVIGATION
Pr Up/Down remote keys : cycle through the service items available. Vol -/+ remote keys : Dec./Increment the values within range – Cycle trough option bits. OK key : Toggle bits in option byte
Order Item Default setting
1 HOR CEN 2 RED GAIN 3 GRN GAIN 4 BLUE GAIN 5 RED BIAS 6 GRN BIAS 7 AGC LEVEL 8 G2 – SCREEN
9 OPTION1 10 OPTION2 11 AVL 12 PARABOLA 13 HOR WIDTH 14 CORNER T 15 CORNER B 16 HOR. PARAL 17 V. LINEAR 18 V. SLOPE 19 EW TRAPEZ 20 S CORRECT 21 VERT CENT 22 VERT SIZE
3.3 MICROCONTROLLER CONFIGURATION : OPTION BITS
There are two option bytes available (16 bits in all). These option bits are available from Service mode. First find the OPTION1 or OPTION2 control, and then use the Volume PLUS/MINUS buttons on the remote control keypad to locate the bits, and OK key to toggle them. The table below shows the two option bytes available;
3.4 OPTION 1
9
B7 B6 B5 B4 B3 B2 B1 B0
TOP
1
Teletext
OFF TOP
Teletext
0
ON
3.5 OPTION 2
B7 B6 B5 B4 B3 B2 B1 B0
1
Fixed to
‘0’
0
FASTEXT
(FLOF)
OFF
FASTEXT
(FLOF) ON
JVC
remote
control
Daewoo
Remote
control
TUBE
4:3
TUBE
16:9
AVL
control
OFF
AVL
control
ON
VAI bit set
to 1 in SECAM L VAI bit set
to 0 in SECAM L
PICTURE
TILT ON
PICTURE TILT OFF
Dolby
Virtual
OFF
Dolby
Virtual
ON
14” (AV2 OFF)
21” (AV2
ON)
SVHS3
disable
SVHS3
enable
Full
ATSS
Basic
ATSS
CP-093F Service Manual
TUNER OPTIONS
00 = Philips
01 = Not used
10 = Alps
11 = Parstnic (DW)
Double
Window
Enabled
Double
Window
Disabled
n.u.
Must
be set
to 1 for
future
compa
tibility
CP-093F Service Manual
10
3.6 NVM default setting
The purpose of this message, when you change a virgin EEPROM, is to allow to modify the NVM DATA to desired values.
1 - Introduction :
The NVM default values are fixed for the user, but for flexibility in service, these data are stored in NVM and can be changed when the TV set is in a special mode call "NVM EDITOR". This mode can only be access from "FACTORY" mode.
2 - Entering into "FACTORY" mode.
To switch the TV set into FACTORY mode, use the factory remote control, and press on “SVC” key. The factory menu will appear on the screen, showing “FACTORY” , plus other relevant information like software version and date.
WARNING : When in "FACTORY" mode you should not press any key other than the keys described in the procedure below. Unwanted key stroke could misadjust the TV set.
3 - Entering into "NVM EDITOR" mode.
To switch the TV set into NVM EDITOR mode, use the user remote control, and press on “ON/ENTER” key. The NVM EDITOR window will appear on the screen. This mode allow you to access all data stored in NVM. The current NVM address is given in column "ADDR." in both DECimal and HEXadecimal format. The column DATA gives the value contained at selected address in both DECimal and HEXadecimal format.
4 - Navigation in "NVM EDITOR" mode.
Use Program Up/Dwn keys to select the desired address. Use Volume Up/Down keys to change the data at selected address. You must press " OK/ENTER" key to store value after modification.
The data can be adjusted between 0 and 63.
5 - Exit "NVM EDITOR" mode.
To switch the TV set back into FACTORY mode, use the user remote control, and press on “MENU” key. The factory menu will appear on the screen, showing “FACTORY”.
6 - Exit "FACTORY" mode.
To exit "FACTORY" mode, use the factory remote control, and press on “SVC” key. The factory menu will disappear from the screen.
CP-093F Service Manual
11
NVM DATA CHANGE LIST
No Register Name Address Default 14H9 21H9
1 OCP_THRESHOLD 0x58F 0x91 <- <­2 DCXO 0x590 0x4E <- <­3 AVLLEV 0x621 0x5 <- <­4 TELETEXT - Brightness 0x642 0x19 <- <­5 OSD - Brightness 0x644 0x7 <- <­6 Nor1_Bright 0x64A 0x23 <- <­7 Nor1_contrast 0x64B 0x2E <- <­8 Nor1_Colour 0x64C 0x1C <- <­9 Nor1_Sharpness 0x64D 0x23 <- <-
10 Nor1_Tint 0x64E 0x20 0x1F 0x1F 11 Nor2_Bright 0x653 0x28 <- <­12 Nor2_Contrast 0x654 0x13 <- <­13 Nor2_Colour 0x655 0x19 <- <-
14 Nor2_Sharpness 0x656 0x1B <- <­15 Nor2_Tint 0x657 0x20 0x1F 0x1F 16 V - Linearity 0x667 0x2A 0x22 0x27 17 Peak White Level 0x671 0x1 <- <­18 Soft Clipping Level 0x672 0x5 0x7 0x7 19 PresetGainRGB 0x673 0x2A 0x1 0x7 20 PresetGainRGB 0x674 0x2A 0x1 0x7
(hex)
21 PresetGainRGB 0x675 0x2A 0x1 0x7 22 Cathode_Drive 0x67B 0x1 <- <­23 RPA 0x680 0x1 0x2 0x2 24 Black Stretch 0x682 0x1 0x2 0x2 25 BSD 0x683 0x1 0x0 0x0
26 AAS 0x684 0x1 0x0 0x0 27 BCS 0x685 0x1 <- <­28 Y_delay_PAL_BG 0x686 0x5 <- <­29 Y_delay_SECAM_BG 0x687 0x8 <- <-
30 Y_delay_PAL_DK 0x688 0x5 <- <­31 Y_delay_SCM_DK 0x689 0x5 <- <­32 Y_delay_PAL_I 0x68A 0x7 <- <­33 Y_delay_SECAM 0x68B 0x5 <- <­34 Y_delay_SECAM-L 0x68C 0x8 <- <­35 Y_delay_AV 0x68D 0xA <- <­36 G2_Bright 0x68E 0x1A <- <­37 G2_Contrast 0x68F 0x42 <- <-
CP-093F Service Manual
12
4. TV SET ALIGNMENT
4.1 G2 ALIGNMENT
- Tune a colour bar pattern.
- Find the “G2 – SCREEN ” item in service mode.
- Adjust screen volume (on FBT) to bring the cursor to central position (Green).
4.2 WHITE BALANCE
- Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature.
- Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature.
4.3 FOCUS
Adjust the Focus volume (on FBT) to have the best resolution on screen.
4.4 VERTICAL GEOMETRY
Adjust V. LINEAR (linearity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude), VERT CENT (vertical centring) to compensate for vertical distortion.
4.5 HORIZONTAL PICTURE CENTRING
Adjust HOR CEN (Horizontal centre) to have the picture in the centre of the screen.
4.6 EAST / WEST CORRECTION
Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, to compensate for geometrical distortion.
HOR PARAL
HOR WIDTH
13
adjust for 93% overscan.
CP-093F Service Manual
PARABOLA
CORNER B & CORNER T
EW TRAPEZ
4.7 AGC
- Make sure option bits are correct for the tuner fitted on the chassis (See above how to change option bits).
- Adjust the antenna signal level at 62 dBµV
- Tune a colour bar pattern.
- Find the “AGC” item in service mode.
- Press the key “OK ” on the remote keypad and wait until AGC level stabilise to the optimum value.
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