Daewoo DTU-20XX MP, DTU-14XX MP, DTU-20XX MT, DTU-20XX MZ, DTU-20XX BZ Service Manual

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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.

Service Manual

Color Television

CHASSIS :

Model :

CM-500S

DTU-14XX ME/MP/MT/MZ/BZ/AT DTU-20XX ME/MP/MT/MZ/BZ/AT DTU-21XX ME/MP/MT/MZ/BZ/AT DTU-21XX MEF/MPF/MTF/MZF/BZF

S/G No.:TCM500SEF0

APR. 2006

MODEL OPTION LIST

MODEL TEXT PIP

ME O O MP X O MT O X MZ X X

-1-

1. MOBEL DISCRIPTIONS OF CM-500S CHASSIS 2

2. SPECIFICATIONS 3

3. SAFETY INSTRUCTION 4

4. ALIGNMENT INSTRUCTIONS 5

5. RECOMMANDED EEPROM DATA FOR CM-500S 18

6. ELECTRICAL PARTS LIST 19

7. DIFFERENT PARTS LIST FOR EACH MODELS 34

8. SCHEMATIC DIAGRAM 39

9. PRINTED CIRCUIT BOARD 40

10. MECHANICAL EXPLODED VIEW AND PARTS LIST 41

11. TROUBLE SHOOTING GUIDE 42

TABLE OF CONTENTS

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1. MODEL DESCRIPTIONS

1. Model Descriptions of Cm-500S Chassis

1-1. MODEL list

Model name

CRT size

(14,20,21)

Enclosure Type

(@@)

Power

Consumption

Sound Output

(at 1KHz 80% Mod.)

DTU-14@@##$$ DTU-14@@## DTU-14@@

14 inch FST

(Normal)

55 W 4W + 4W

DTU-20@@##$$ DTU-20@@## DTU-20@@

20 inch FST

(Normal)

64 W 4W + 4W

DTU-21@@##$$ DTU-21@@## DTU-21@@

21 inch FST

(Normal)

20,D2,D3,D4,D7,D8, D9, K2,K3,K5,K7 and Variants

72 W 6W + 6W

DTU-21@@##F$$ DTU-21@@##F DTU-21@@F

21 inch FLAT

U6,U8,30,31,32,34,3 5,36,37,F2, A7 and Variants

74 W

- 4W + 4W for 2130 & 21U6

- 6W + 6W for others

1-2. Suffix, ##. Indicates a fuctionas follws ;

Suffix, ## PIP TEXT Remark

MZ, BZ or None(Blank) X X Without Teletext and PIP

MT, BT, AT

X O Without PIP, With Text

MP, BP O X Without Text, with PIP

ME, BE O O With Text and PIP

1-3. Suffix, @@, Indicates Enclosure Type

1-4. Suffix, $$, Indicates Color of Enclousre

(All alphabet characters can be used for enclosure color, From A to Z)

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2. SPECIFICATIONS

Items Model DTU-14XX ME/MP/MT/MZ/BZ/AT

DTU-20XX ME/MP/MT/MZ/BZ/AT DTU-21XX ME/MP/MT/MZ/BZ/AT DTU-21XX MEF/MPF/MTF/MZF

TV Standard Color system PAL/SECAM, NTSC-4.43(AV)

Sound system B/G, D/K, I, H Rated Voltage AC 110-250V, 50/60Hz Power consumption 14”: 55W, 20”:64W, 21”: 72W, 21”FLAT:74W Sound Output Power 14” & 20”:4W+4W(at 1KHz 80% Mod.)

21” & 21” F: 6W + 6W(at 1KHz 80% Mod.)

Channel Conerage VHF BAND I : CH 02 ~ CH04(48.25MHz ~ 62.25MHz)

BAND II : CH05 ~ CH12(175.25MHz ~ 224.25MHz) CABLE BAND : S01 ~ S03, (69.25MHz ~ 83.25MHz)

S01 ~ S20, (105,25MHz ~ 294.25MHz)

HYPER BAND : S21~S41(303.25 ~ 463.25MHz)

UHF

BAND IV , V : CH21 ~ CH69(471.25MHz ~ 855.25MHz) Tuning System FS Tuning System Program No. Indication ON-Screen Display Program Selection 200 Programs Aux. Terminal AV1 input

AV2 input <REAR> (Model for 29U8 Seriese:

FRONT)

DVD1, DVD2

OUTPUT<OPTION:TV OUT or Monitor OUT> Remote Control Unit R-49C07 Screen size 67.6Cm

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3 SAFETY INSTRUCTION

NOTE :

BEFORE SERVICING THIS CHASSIS READ THE “X-RAY RADIATION PRECAUTIONS”, “SAFETY PRECAUTIONS” AND “PRODUCT SAFETY NOTICE” BELOW.

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 25.6KV [Normal Type](27.9KV [Flat Type]) at max beam current. The high voltage must not, under any circumstances, exceed 28.6KV [Normal Type] (30.9KV [Flat Type]). 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 XRAY RADIATION protection, the replacement tube must be exactly the same type tube as specified in the parts list.

SAFETY PRECAUTION

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.

2. If any Fuse in this TV receiver is blown, replace it with the FUSE specified in the Replacement Parts List.

3. When replacing a high wattage resistor (metal oxide film resistor) in the circuit board, keep the resistor 10 mm away from circuit board.

4. Keep wires away from high voltage or high temperature components.

5. This receiver must operate between AC 110-250 volts, 50/60Hz. NEVER connect to DC supply or any other power 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.

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4. ALIGNMENT INSTRUCTIONS

DOCUMENT HISTORY

VERSION DATE COMMENTS

V0.00 26/10/04

Document imported from project Cp520(Author J.D.Santos) V1.00 12/11/04 Major revision after visit in Gunpo RND V1.01 25/11/04 Tuner option revision(Byte1, bite2,1,0) V1.02 29/11/04 Curtain beep option added(Byte3, bits1)

Curtain ON/OFF bit setting corrected V1.03 02/12/04 Local key option bit changed.

Digital eye levels added V1.04 17/12/04 Local keyboard option 01 changed V1.05 20/01/05 AV stereo and Koran options added V1.06 16/02/05 Default setting in case of virgin EEPROM changed

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ALIGNMENT INSTRUCTIONS

4.1MICROCONTROLLER 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 V1.00”. To exit SERVICE menu press menu key or Stand By key.

4.2 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 OPTION3 12 V. LINEAR 13 V. SLOPE 14 S. CORRECT 15 VERT CENT 16 VERT SIZE 17 BRIGHINESS 18 SHIPPING

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ALIGNMENT INSTRUCTIONS

1 CONTROL BITS There are 4 option bytes available (16 bits in all). These option bits are available from FACTORY

and SERVICE mode. First find the OPTION1, OPTION2, OPTION3 or OPTION4 control, and then use the UP/DOWN and PLUS/MINUS keys on the relevant remote keypad to control the bits. The table below shows the three option bytes available; Default setting in case of virgin EEPROM are shown in light grey.

1.1 OPTOIN1 B7 B6 B5 B4 B3 B2 B1 B0

TOP

Teletext

OFF

FASTEXT

(FLOF)

OFF

TUBE

4:3

Teletext ON

Dolby

Virtual

OFF

TOP

Teletext

FASTEXT

(FLOF) ON

TUBE

16:9

Teletext OFF

Dolby

Virtual

TUNER OPTIONS

(see table below)

1.2 OPTION2

B7 B6 B5 B4 B3 B2 B1 B0

NEC remote control

AV out :

monitor

Koran

functions

enabled

Digital eye

disabled

PARS

logo OFF

Fixed to

Daewoo

Remote

control

AV out :

Tuner

Koran

functions

disabled

Local key option

(see table below)

Digital

eye

enabled

1.3 OPTION3 B7 B6 B5 B4 B3 B2 B1 B0

Curtain

OFF

Chassis

with E/W

correction

circuit

PIP

OFF

Beep at

curtain

opening :

OFF

Full

stereo

Curtain ON

Teletext language table

Chassis

without

E/W

correction

circuit

PIP ON

Beep at

curtain

opening :

Stereo

only

1.4 OPTION4 B7 B6 B5 B4 B3 B2 B1 B0

Koran direct key enabled

AV3

enabled

QSS

enabled

DVD2

enabled

Not used, must be set to 1 for future

compatibility

Koran

direct key

disabled

AV3

Disabled

Intercarri

enabled

DVD2

disabled

(DVD1

becomes

AV3)

WARNING :

- Until SW version x.56, Option Byte 4 can only be accessed by NVM editor at NVM address 0x752

- From SW version x.56, it can also be accessed from Factory mode or from Service mode

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ALIGNMENT INSTRUCTIONS

4.4 USER GUIDE

WARNING : Until SW version x.56, Option Byte 4 can only be accessed by NVM editor at NVM address 0x752 From SW version x.56, it can also be accessed fr om Factory mode or from Service mode.

4.4.1 ENTERING FACTORY MODE

To switch the TV set into FACTORY mode, use the factory remote control, and press on SVC . The factory menu will appear on the screen, showing FACTORY Vx.xx (where x.xx is the software version).

4.4.2 ENTERING OPTION BITS MENU

To find the option bits, push the button OPT once. To find OPTION2 press the button OPT a second time.

4.4.3 SELECTING OPTION BITS

From left to right, bits 7 to 0 are shown. Navigation is done from the with the FACTORY remocon with the VOL MIN and VOL MAX buttons (otherwise known as EAST, WEST). The selected bit is highlighted.

4.4.4 TOGGLING OPTION BITS

This is done by using the PR UP and PR DOWN buttons (otherwise known as NORTH, SOUTH).

4.4.5 EXITING OPTION BITS MENU

Push the button OPT a third time. The full sequence enter to exit is; FACTORY -> OPTION1 -> OPTION2 -> OPTION3 -> FACTORY

4.4.6 AFTER SETTING OPTION BITS

Before pushing on the shipping key, BRI. , it is necessary to push the NORMAL key to obtain NORMAL I. This will reset all the sound and brightness settings to a factory defined level, as well as some other settings such as sound PRESET and WAKE TIME/PROG.

Then, on pushing the shipping key, these levels are memorised in the television, ready for packing and delivery.

4.4.7 VERIFICATION

On pushing the shipping BRI. key, a four digit hexadecimal number is displayed in addition to

SHIPPING . This number is there to verify the option bits setting that has been entered. For example the binary code 1001 1111 (OPTION3) 0000 0111 (OPTION2) 1100 0010 (OPTION 1) will give 9F 07 C2 hex. The order of display is therefore OPTION3, OPTION2 then OPTION1 when reading from left to right.

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ALIGNMENT INSTRUCTIONS

4.5 CONTROL DESCRIPTION

4.5.1 OPTION 1 BITS

TOP Teletext (Bit 7)

Enables/disables the TV from displaying TOP row 24 link titles, and the dedicated TOP menu table. A FLOF (if available) or SIMPLE / PAGETRACE presentation will be used.

FLOF/Fastext (Bit 6)

Enables/disables the TV from displaying FLOF row 24 link titles. A TOP (if available) or SIMPLE / PAGETRACE presentation will be used.

Tube (Bit 5)

Define as 4:3 or 16:9 tube. This will permit the ZOOM function to understand the formats that should be available.

Teletext ON/OFF (Bit 4)

Enables/disables the Teletext on TV. If Teletext is disabled, user can not select clock prog and zoom selection in features menu. WSS is also disabled.

Dolby Virtual (Bit 3)

Allows Dolby Virtual (trademark) 3D effect to be available from the user control (button 3D ). Note : Dolby Virtual is only available with some UOC reference.

Tuner (Bits 2, 1 & 0)

Configures the software to communicate with the tuner via i2c bus. Incorrect configuration may not be immediately obvious, but will result in loss of functionality (e.g. unable to tune UHF channels, unable to tune some hyperband channels).

Bit2 Bit1 Bit0 LNA Tuner

0 0 0 No Philips (external AGC) 0 0 1 No Philips (internal AGC) 0 1 0 No LG 0 1 1 No Partsnic / Samsung 1 0 0 - Should not be used 1 0 1 - Should not be used 1 1 0 yes LG 1 1 1 yes Partsnic / Samsung

See also NVM mapping to configure parameters for automatic AGC adjustment when external AGC is used. When internal AGC is used, the TOP is stored in NVM.

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ALIGNMENT INSTRUCTIONS

4.5.2 OPTION 2 BITS Remote control(Bit 7)

This is not intended to be changed by use of the FACTORY remote control.

NEC/Da ewoo Remocon (Bit 6)

User remote control configuration, the choice being between the following;

§ NEC remocon ( 1)

§ Daewoo R-46G22 (0)

The R-30SVC7 FACTORY remote control will never be affected by this setting.

AV out option (Bit 5)

This allow you to select the desired signal at output pin 46. When set to 1 the output is monitor out otherwise the output is the CVBS signal demodulated from the tuner IF. Sound output is also switched (#37 and #38).

Local keyboard option (Bit 3 & 2)

11 10 01 00 0 mV ~ 220 mV Not used Menu Menu 220 mV ~ 620 mV (TV/AV) Menu TV / AV Prog. Up 620 mV ~ 1.06 V Vol. Up Vol. Dwn Prog. Dwn

1.06 V ~ 1.48 V Vol. Dwn Vol. Up Vol. Up

1.48 V ~ 1.79 V Prog. Up Prog. Dwn Vol. Dwn

1.79 V ~ 2.07 V Prog. Dwn Prog. Up TV / AV

Not used

Digital eye ON/OFF (Bit 1)

Enables/disables the digital eye function. When enabled and selected, the microcontroller measures DC level on IC pin15, and adjusts picture setting according to the table below.

Brightness Contrast Colour Sharpness 0 mV ~ 450 mV 18 30 26 27 450 mV ~ 900 mV

28 46 28 29

900 mV ~ 1.35 V 30 50 29 30

1.35 V ~ 1.80 V 32 55 30 31

1.80 V ~ 2.25 V 34 60 31 32

2.25 V ~ 2.70 V 36 63 32 33

PARS Logo ON/OFF (Bit 0)

Enables/disables the display of PARS logo at power on.

4.5.3 OPTION 3 BITS

Curtain function at power ON(Bit 7)

Enables/disables the curtain function at power ON. The frequency and volume of associated beep sound is controlled by NVM data.

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ALIGNMENT INSTRUCTIONS

4.5.4 Teletext language option (Bit 6, 5& 4) Bit 6, 5& 4

Latin West 000 Latin East 001 Russia 010 Persia 011 Arabic 100 Automatic 101 .. Automatic 111

Teletext National Option table for each language option :

Teletext table C12 C13 C14 Basic Char.

Set

Twist Char. Set

NOT E/W

0 0 0 Latin Latin English West 0 0 1 Latin Latin German West 0 1 0 Latin Latin Swedish/FIn West 0 1 1 Latin Latin Italian West 1 0 0 Latin Latin French West 1 0 1 Latin Latin Spanish/Portuguese West 1 1 0 Latin Latin Turkish West

Latin West

1 1 1 Latin Latin English West 0 0 0 Latin Latin Polish East 0 0 1 Latin Latin German East 0 1 0 Latin Latin Estonian East 0 1 1 Latin Latin German East 1 0 0 Latin Latin German East 1 0 1 Latin Latin Slovenian East 1 1 0 Latin Latin Czech/Slovak East

Latin East

1 1 1 Latin Latin Rumanian East 0 0 0 Latin Latin English West 0 0 1 Latin Latin German West 0 1 0 Latin Latin Estonian East 0 1 1 Latin Latin German East 1 0 0 Cyrillic Latin Russia East 1 0 1 Cyrillic Latin Ukrainian East 1 1 0 Latin Latin Czech/Slovak East

Russian

1 1 1 Latin Latin Rumanian East 0 0 0 Latin Latin English West 0 0 1 Latin Latin German West 0 1 0 Latin Latin Swedish/Fin West 0 1 1 Latin Latin Italian West 1 0 0 Latin Latin French West 1 0 1 Latin Latin Spanish/Portuguese West 1 1 0 Latin Latin Turkish West

Arabic / Persian

1 1 1 Arabic Latin Arabic West

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ALIGNMENT INSTRUCTIONS

East / West correction (Bit 3)

You must enable this bit for large screen CRT which need EAST WEST correction circuitry.

PIP (Bit 2)

Enable disable PIP function. Make sure PIP board is inserted in the main board.

Beep at curtain opening (Bit 1)

Enable / disable beep sound at power ON.

4.5.5 OPTION 4 BITS

Koran direct key option (Bit 3)

When set to 1, pressing Yellow key makes the pray menu come on screen. When set 0, the function is disabled. If OSD language is not Persian, this option bit is ignored.

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ALIGNMENT INSTRUCTIONS

4.5.2 OPTION 2 BITS

- Remote control(Bit 7) This is not intended to be changed by use of the FACTORY remote control.

- NEC/Daewoo Remocon(Bit 6)

User remote control configuration, the choise being between the following;

- NEC remocon(‘1’)

- Daewoo R-49C07(‘0’)

The R-30SVC7 “FACTORY” remote control will never be affected by this setting.

- Local keyboard option (Bit 3 & 2)

- Digital eye ON/OFF(Bit 1)

Enables/disables the digital eye function. When enabled and selected, the microcontroller measures DC level on IC pin 15, and adjusts picture setting according to the table below.

- PARS Logo ON/OFF(Bit 0)

Enables/disables the display of PARS logo at power on.

4.5.3 OPTION 3 BITS

- Curtain function at power ON(Bit 7) Enables/disables the curtain function at power ON. The frequency and volume of associated beep sound is controlled by NVM data.

11 10 01 00

0 mV ~ 220 mV Not used Menu Menu 22 mV ~ 620 mV (TV/AV) Menu TV/AV Prog. Up 620 mV ~ 1.06 V Vol. Up Vol. Dwn Prog. Dwn Not used

1.06 V ~ 1.48 V Vol. Dwn Vol. Up Vol. Up

1.48 V ~ 1.79 V Prog.Up Prog. Dwn Vol. Dwn

1.79 V ~ 2.07 V Prog.Dwn Prog. Up TV/AV

Brightness Contast Colour Sharpness

0 mV ~ 450 mV 18 30 28 27 450 mV ~ 900 mV 28 46 28 29 900 mV ~ 1.35 V 30 50 29 30

1.35 V ~ 1.80 V 32 55 30 31

1.80 V ~ 2.25 V 34 60 31 32

2.25 V ~ 2.70 V 36 63 32 33

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Teletext table

C12 C13 C14 Basic Char.Set Twist Char.Set NOT EW

Latin West 0 0 0 Latin Latin English West

0 0 1 Latin Latin German West 0 1 0 Latin Latin Swedish/Fin West 0 1 1 Latin Latin Italian West 1 0 0 Latin Latin French West 1 0 0 Latin Latin

Spanish/Portuguese

West 1 1 0 Latin Latin Turkish West 1 1 1 Latin Latin English West

Latin East 0 0 0 Latin Latin Polish East

0 0 1 Latin Latin German East 0 1 0 Latin Latin Estontan East 0 1 1 Latin Latin German East 1 0 0 Latin Latin German East 1 0 1 Latin Latin Slovenian East 1 1 0 Latin Latin Czech/Slovak East 1 1 1 Latin Latin Rumanian East

Russian 0 0 0 Latin Latin English West

0 0 1 Latin Latin German West 0 1 0 Latin Latin Estonian East 0 1 1 Latin Latin German East 1 0 0 Cyrillic Latin Russia East 1 0 1 Cyrillic Latin Ukrainian East 1 1 0 Latin Latin Czech/Slovak East 1 1 1 Latin Latin Rumanian East

Arabic/ 0 0 0 Latin Latin English West

Persian 0 0 1 Latin Latin German West

0 1 0 Latin Latin Swedish/Fin West 0 1 1 Latin Latin Italian West 1 0 0 Latin Latin French West 1 0 1 Latin Latin

Spanish/Portuguese

West 1 1 0 Latin Latin Turkish West 1 1 1 Arabic Latin Arabic West

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ALIGNMENT INSTRUCTIONS

- Teletext language option(Bit 6, 5&4)

Teletext National Option table for each language option:

Bit6, 5&4

Latin West 000 Latin East 001 Russia 010 Persia 011 Arabic 100 Not used 101 .. Not used 111

- East/West correction (Bit 3) You must enable this bit for large screen CRT which need EAST WEST correction circuitry.

- PIP(Bit 2) Enable disable PIP function. Make sure PIP board is inserted in the main board.

- Beep at curtain opening(Bit 1) Enable/disable beep sound at power ON.

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ALIGNMENT INSTRUCTIONS

4.5.4 TV SET ALIGNMENT (1) G2 ALIGNMENT

- Tune a colour bar pattern.

- Fine the “G2-SCREEN” item in service mode.

- Adjust screen volume(on FBT) to make the horizontal line just before disappeared.

(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.

(3) FOCUS

Adjust the Focus volume ( on FBT ) to have the best resolution on screen.

(4) VERTICAL GEOMETRY

Adjust V. LINEAR (linearity), S CORRECT (S. Correction), VERT SIZE (Vertical amplitude), VERT CENT (vertical centring) to compensate for vertical distortion.

(5) HORIZONTAL PICTURE CENTRING

Adjust HOR CEN (Horizontal centre) to have the picture in the centre of the screen.

(6) EAST / WEST CORRECTION(

Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ, to compensate for geometrical distortion.

HOR PARAL

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ALIGNMENT INSTRUCTIONS

HOR WIDTH

adjust for 90% overscan.

PARABOLA

CORNER B & CORNER T

EW TRAPEZ

3.7.7 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 dB

V± 2

- Tune a colour bar pattern.

- Find the “AGC LEVEL”item in service mode.

- Press the key “OK”on the remote keypad and wait until AGC level stabilise to the optimum value.

- Alternatively, use “Vol Up/Dwn”keys to adjust manually to the desired Tuner Take Over Point (TOP).

+ 37 hidden pages

Daewoo DTU-20XX MP, DTU-14XX MP, DTU-20XX MT, DTU-20XX MZ, DTU-20XX BZ Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual