Daewoo DTH-20D5FSN Bedienungsanleitung

ColourTelevision

CHASSIS : CM-220N

Model : DTH-20D5FSN

DTH-21D4FSN

S/M No. : TCM220NEF0

Service Manual

DAEWOO ELECTRONICS CO., LTD

http : //svc.dwe.co.kr May.2001

SPECIFICATIONS

DTH-20D5FSN DTH-21D4FSN

MODEL

ITEM

TV STANDARD PAL-M/N

POWER INPUT 220V 50/60HZ

POWER CONSUMPTION 88W

TUNING SYSTEM Frequency Synthesizer (FS)Tuning System

TV VHF(L) : CH2 ~ CH6

UHF(H) : CH7 ~ CH13

UHF : CH14 ~ CH69

CATV VHF(L) : 5A,A,B,A-5-A-1

TUNING RANGES CH2-CH6

VHF(H) : C-W+11

CH7-CH13

UHF : W+12-W+84

SOUND OUTPUT 5W + 5W

SPEAKER 8 ohm 5W X 2EA

ANTENNA INPUT IMPEDANCE 75 ohm Unbalanced

Font :Video, Audio, Earphone

Rear:Video, Audio,(R,L)

Picture IF Carrier Frequency : 45.75 MHZ

INTERMEDIATE FREQUENCIES Sound IF Carrier Frequency :41.25 MHZ

Color Sub-Carrer Frequency :3.579545 MHZ

REMOTE CONTROL R-43A01

1) ICON MENUTYPE

2) 3-Language OSD

3) WITH CAPTION

4) CH LABEL

DTH-20D5FSN DTH-21D4FSN

SPECIAL FUNCTIONS

AUXILIARY INPUT TERMINAL

SPECIFICATIONS..................................................................................................................................... 2

CIRCUITBLOCKKIAGRAM .................................................................................................................... 3

ALIGNMENTINSTRUCTION.................................................................................................................... 4

YourRemoteControl ..........................................................................................................................................4

Service Mode Adjustment...................................................................................................................................5

Assembly Adjustment .........................................................................................................................................6

SCHEMATICDIAGRAM ........................................................................................................................... 10

PRINTEDCIRCUITBOARD ..................................................................................................................... 11

EXPLODEDVIEW..................................................................................................................................... 12

SERVICEPARTSLIST ............................................................................................................................. 14

APPENDIX (“Appendix is provided only by internet [http://svc.dwe.co.kr]”)

TROUBLESHOOTINGGUIDE................................................................................................................. 34

. No Power......................................................................................................................................................34

2. No Picture .....................................................................................................................................................35

3. No Sound......................................................................................................................................................36

4. CH Don’t Stop...............................................................................................................................................37

5. No Color........................................................................................................................................................38

6.NoVertical Deflection....................................................................................................................................38

7. No On-Screen Display ..................................................................................................................................39

8.RemoteControlDoesNot Operate................................................................................................................39

TABLE OF CONTENTS

SPECIFICATIONS

CAUTION

CM-220N

MODEL

ITEM

TV STANDARD PAL-M/N

POWER INPUT 220V 50/60HZ

POWER CONSUMPTION 88W

TUNING SYSTEM Frequency Synthesizer (FS)Tuning System

TV VHF(L) : CH2 ~ CH6

UHF(H) : CH7 ~ CH13

UHF : CH14 ~ CH69

CATV VHF(L) : 5A,A,B,A-5-A-1

TUNING RANGES CH2-CH6

VHF(H) : C-W+11

CH7-CH13

UHF : W+12-W+84

SOUND OUTPUT 5W + 5W

SPEAKER 8 ohm 5W X 2EA

ANTENNA INPUT IMPEDANCE 75ohmUnbalanced

Font :Video, Audio, Earphone

Rear:Video, Audio,(R,L)

Picture IF Carrier Frequency : 45.75 MHZ

INTERMEDIATE FREQUENCIES Sound IF Carrier Frequency :41.25 MHZ

Color Sub-Carrer Frequency :3.579545 MHZ

REMOTE CONTROL R-43A01

1) ICON MENUTYPE

2) 3-Language OSD

3)WITH CAPTION

4) CH LABEL

DTH-20D5FSN DTH-21D4FSN

SPECIAL FUNCTIONS

AUXILIARY INPUT TERMINAL

CIRCUIT BLOCK DIAGRAM

Your Remote Control

ALIGNMENT INSTRUCTION

CAUTION

1. POWER

Use this button to turn yourTV on or off.

2. MUTE

Use to turn theTV’s sound on and off.

3. CH

Use these buttons to change yourTV’s volume, to

activate selections in the menu system.

4. VOL

Use these buttons to change yourTV’s volume, to

activate selections in the meny system,or to change

audio and video settings.

5. MENU

Use this button to turn theTV’s menu system on and off.

6. DISPLAY

Use this button to display the channel numbeer and

status.

7. INPUT

Use this button to select theTV’s signal source.

8.VIDEO

Use this button to display video adjustment.

9. 0-9

Use these buttons to change channels.

10. SLEEP

Use this button to program theTV to turn off after a

certain time.

11.PREVIOUS

Use this button to return to the previous channel you

werewatching.

Table-A :Adjust the values of service mode when a part is replaced.

ADJUSTMENT

NECESSARY UNNECESSARY

I701 Data is stored in I703

(U-COM)

I101

(MAIN) Initial setting values are written from I701.

Adjustingltems

S5 RFAGCD

S6 H.PHASE/V.POSI/V.SIZE

S8 RD/BD/RB/GB/BB

S9 Subbrightness

CRT Adjust items related to picture tube only. (White Balance adjustment)

ALIGNMENT INSTRUCTIONS

SERVICE MODE ADJUSTMENTS

Follow the steps below whenever service adjustment is required.SeeTable- A andTable- B to determine if

serviceadjustments are required.

1) How to enter the service mode using the user remote control.

•Turn the set on.

• Direct the remote control to the reception window ofTV.

• Push buttons of remote control in sequence as follows.

1 MUTE DISPLAY MUTE

•Then, the screen will appear as follows.

• Using the channel up or channel down button, select the item you wish to adjust.

(The color of selected item turns into the red.)

• Press the volume up or down button to enter in the service mode you wish to adjust.

2) How to memorize the adjusted values in the service mode.

• Must press DISPL AY button the state which the screen is displaying each of service menus

after all adjustments are completed each of all service menu.

PART

REPLACED NOTES

I703

(EEPROM)

ALIGNMENT INSTRUCTIONS

Table-B DATA

INITIAL RANGE

S2 ScreenAdjustment - -

Auto RF AGC - -

VideoLevel(VIDEOL) 7 0~7 Must be set to 7

RF AGC Delay (RFAGCD) *0~63 Align RF AGC threshold

FM Level (FM.LEV) 8 0~31 Must be set to 20

AGC Point 3.75 - Select AGC reference voltage

A/DVALUE - -

HorizontalPhase(H.PHASE) *0~31 Align sync to flyback pulse, using internal cross pattern(S7)

Vertical Position (V.POSI) *0~63 Align vertical DC bias, using internal cross pattern(S7)

Vertical Size (V.SIZE) *0~127 Align vertical amplitude, using internal cross pattern(S7)

NO SD POWER OFF YES - Automatically turn off in 15min for no received signal.

Vertical S-Correction (V SC) 0 0~31 Must be set to 6

Vertical Linearity (V LIN) 20 0~31 Must be set to 16

InternalBlack - - Display internalBLACKpattern

Internal100%White - - Display internal100%WHITE

Internal 60%White - - Display internal 60%WHITE

InternalCross Pattern - - Display internalCROSSpattern

Red Drive (RD) *0~127 Align RED OUT Ievel

Green Drive (GD) 10 0~15 Must be set to 10

Blue Drive (BD) *0~127 Align BLUE OUT AC level

Red Bias (RB) *0~255 Align RED OUT DC Ievel

Green Bias (GB) *0~255 Align GREEN OUT DC Ievel

Blue Bias (BB) *0~255 Align BLUE OUT DC Ievel

Subbrightness *0~127 Align common RGB DC level

Contrast 10 0~27

Tint 27 0~27

Color 15 0~27

S12 ForwardingMode - FactoryInitialization

MODE ADJUSTMENT ITEMS REMARKS

* indicates the items with different settings each of sets

ASSEMBLY ADJUSTMENTS

1) SCREEN ADJUSTMENT (S2)

Enter the service mode and select service adjustment S2.

You cna see the one horizontal line on the screen.

Adjust the Screen ControlVolume (located on FBT) so that the horizontal line onscreen may be

disappeared.

Press the volume up or down button to exit in the screen adjustment mode.

NOTE

IN THE SCREEN ADJUSTMENT MODE, DONT PRESS OTHER BUTTONS EXCEPT VOLUME UP OR DOWN BUTTON.

ALIGNMENT INSTRUCTIONS

2) FOCUS ADJUSTMENT

•Turn in a local station and adjust the Focus Control knob (located on FBT) for best picture

details at high light condition.

3) RF AGC DELAY ADJUSTMENT (S5)

• Receive a good local channel.

• Enter the service mode and select service adjustment S5.

•You can see the OSD as shown in below.

• Select RFAGCD item, press the volume up or down button until noise or beat in picture disappears.

• Press the DISPLAY button to memorize the data.

4) GEOMETRIC ADJUSTMENTS (S6)

• Enter the service mode and select service adjustment S7.

•Whenever you select the“S7”using the volume up or down button, the screen is changing like this.

NORMAL BLACK WHITE100 WHITE60 CROSS

• Using the volume up or down button, select internal cross pattern.

• Select service adjustment S6.

•You can see the OSD as shown in below.

4-1.Horizontal Position Adjustment

• Select H.PHASE item, adjust H.PHASE data value to obtain proper horizontal centering of the

internal cross pattern at the left and right of the screen.

4-2.Vertical Position Adjustment

• SelectV.POSI item, adjustV.POSI data value to center the raster properly on the screen.

ALIGNMENT INSTRUCTIONS

4-3.Vertical Size Adjustment

Select “V.SIZE” item, adjust “V.SIZE”data value to proper vertical size as follows.

5) WHITE BALANCE ADJUSTMENT (S8)

Receive a good local channel.

Enter the service mode and select service adjustment S8.

You can see the OSD as shown in below.

Using volume up or volume down, adjust service adjustment data of RD/GD/BD and RB/GB/BB until a good gray

scale with normal whites is obtained.ALIGNMENT INSTRUCTIONS

Press the DISPLAY button to memorize the data.

6) DIGITAL PRESET(D.P) ADJUSTMENTS (S9)

SUBBRIGHTNESS ADJUSTMENT

Receive a good local channel.

Enter the service mode and select service adjustment S9.

You can see the OSD as shoown in below.

ALIGNMENT INSTRUCTIONS

Select Subbrightness item, adjust Subbrightness data value to obtain normal brightness level.

Press the DISPLAY button to memorize the data.

CONTRAST

Fixed value = 10

TINT

Fixed value = 27

COLOR

Fixed value = 15

7) FACTORY OUTGOING MODE (S12 : FACT)

If you select the S12, then the set becomes factory outgoing status.

You can see the OSD“outgoing OK”

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