Daewoo DLP-2622 User manual

JUN. 2004
Model : DLP-2622
DLP2622001
26” LCD (Liquid Cystal Display) TV

DLP-2622 SERVICE MANUAL
MODEL NAME DOCUMENTNO REVISIONNO REVISIONDATE PAGE
DLP-2622 ELT040605-002 00 04/06/11 2/71
CONTENTS
REVISION..4
SPECIFICATION.. ...5
CONTROLDESCRIPTIONS .7
REMOTE CONTROLBUTTONS .. ...9
TELETEXTFUNCTIONS .. .10
PINCONFIGURATION 11
FACTORYMENU .20
WHITEBALANCEADJUSTMENT .. ....31
DESCRIPTIONOFSPECIALFUNCTIONS ...34
CIRCUITOPERATION&WAVEFORM ...36
MODULEPOWERSEQUENCE ... ...43
MODULEPRECAUTIONS .45
EXPLODEDOVERVIEW 47
REPLACEMENTPARTS LIST(explodedoverview). ..48

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DISASSEMBLYPROCEDURE ...50
TROUBLE SHOOTING ....54
REPLACEMENTPARTS LIST 56
RS-232C COMMUNICATION ..65
WIRINGDIAGRAM .... ..70
BLOCK DIABRAM 71

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REVISIONHISTORY
VERSION
DATA DESCRIPTION NOTE
00
2004.06.11 정
Note: Specification and othersaresubject tochange withoutnoticeforimprovement.

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TV
1.InputSignal :
PAL
SECAM
SD,HD
VGA~SXGA
2.Tuner : PAL
SECAM
3.InputVoltage :AC100V~240V,@50/60Hz,2A
4. Power Consumption :140W
5.LCDModule : LTA260W1-### (SEC)
6. Speaker Impedance :8
7. SoundOutput :7W+7W(Max)
8. Feature : - AVInput
- Component1Input(DVD)
- Component2Input(DTV)
- D-SUB(Analog RGB15 pin)
- S-Video Input
- CompositeInput
- SCART1Input(Full/RGB,CVBS)
- SCART2Input(Half/CVBS)
- Tuner(PAL,SECAM)
- AudioInput(Composite, Component1/2,S-Video, PC)
- RS-232C (9pin)
9. Function :
- ZOOM
- PIP
- PBP(4:3,16:9)
- MTS
- TELETEXT
10. ExternalInterface
1)AV/COMPONENT /ANALOG RGBInput

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ITEM MIN TYP MAX UNIT
AVVideo Input Level 0.85 1.00 1.15 Vpp
AVSyncInputLevel 0.24 0.29 0.32 Vpp
AVBurstInput Level 0.14 0.28 0.35 Vpp
AVVideo Input Level 0.47 0.63 0.79 V
AVAudioInput L/R 0.47 0.63 0.79 V
Component Video Input Level
(Y,Cb/Pb,Cr/Pr) 0.6 0.7 0.8 Vpp
Analog RGBLevel 0.6 0.7 0.8 Vpp
H/VSyncInputLevel 3.5 3.7 4.5 Vpp
3)COMPONENTMode (Y,Cb/Pb,Cr/Pr)
RESOLUTION
H-Freq(KHz)
V-Freq(Hz) Timing Note
720*480 15.73 60.00 480i
720*576 15.63 50.00 576i Component1
(DVD)
720*480 31.47 59.94 480p
1280*720 45.00 60.00 720p
1280*720 44.96 59.94 720p
1920*1080 33.75 60.00 1080i
1920*1080 33.72 59.94 1080i
Component2
(DTV)
4)SUPPORTING DISPLAYMode
RESOLUTION H-Freq(KHz) V-Freq(Hz)
31,47 60
37.86 72
640*480 37.50 75
720*400 31.47 70
35.15 56
37.88 60
48.88 72
800*600
46.88 75
48.36 60
56,48 70
1024*768 60.02 75
1280*1024 64.00 60
CONTROLDESCRIPTIONS

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REMOTECONTROLBUTTONS

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TeletextFunction

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PINCONFIGURATION
1. A/DBOARD PINCONFIGURATION
#I :InputPort,O:OutPort,G :Ground,I/O:Input/OutputPort,NC :NotConnected
PinNo I/O Specification Description
1(+12V) I +12V MAINB/D12VInput
2(+12V) I +12V MAINB/D12VInput
3(AC_DET) I +3.3V AC_DETECTPIN( 전시:high, 정전시:low)
4(GND) G GND Ground
5(GND) G GND Ground
6(GND) G GND Ground
7(S5V) I S5V Stand-by5VInput
8(GND) G GND Ground
9(BRITE_ADJ ) O BRIGHTNESS_ADJUST
LCD Brightness Adjustment(Min:3V,Max:0V)
10 (GND ) G GND Ground
11(BKL_ON) O BACKLIGHT_ONLCD BacklightON(ON:high, OFF:low)
CON4
12(POWER_
ON/OFF ) O POWER_ON/OFF POWERON_OFFControl(ON:low,OFF:high)
1(GND) G GND Ground
2(LEDG) O LED_GREEN GREENLEDCONTORL OUTPUT PORT
:High:GreenLEDOn
3(LEDR ) O LED_RED REDLEDCONTORLOUTPUT PORT
:High:RedLEDOn
4(IR) I 5V/ 0V IRRECEIVERSIGNALINPUTPORT
5(GND) G GND Ground
CON2
6(VCC ) O 5V/ 0V OSDB/D5VOutput
1(POWER) I 3.3V/0V POWERS/WPORT
:DC POWERON_OFF
2(SOURCE)
I 3.3V/0V InputSource Selecting/Enter
3(MENU) I 3.3V/0V OSDMENU Display
4(CH+) I 3.3V/0V TVCHANNELCONTROL(UP)
5(CH-) I 3.3V/0V TVCHANNELCONTROL(DOWN)
6(VOL+) I 3.3V/0V SOUND CONTROL(VOLUME UP)
7(VOL-) I 3.3V/0V SOUND CONTROL(VOLUME DOWN)
CON1
8(GND) G GND Ground

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1(VCC12) O VCC12 Power Supply+12.0V
2(VCC12) O VCC12 Power Supply+12.0V
3(VCC5A) O VCC5A Power Supply+5.0V
4(MSP_L_OUT1)
O MSP_L_OUT1 MSPLEFT SoundOutput1
5(MSP_R_OUT1)
O MSP_R_OUT1 MSPRIGHT SoundOutput1
6(GND) G GND Ground
7(MSP_L_OUT2)
O MSP_L_OUT2 MSPLEFT SoundOutput2
8(MSP_R_OUT2)
O MSP_R_OUT2 MSPRIGHT SoundOutput2
9(GND) G GND Ground
10 (AFT) I AFT AFTLevel
11(TUNER_SIF)
I TUNER_SIF RFTVSound Input
12((GND) G GND Ground
13(TUNER_CVBS)
I TUNER_CVBS RFTVVideoInput
14 (GND) G GND Ground
15 (S_MUTE) O S_MUTE SoundMute
16 (AMP_ST-BY)
O AMP_ST-BY SoundStand-by
17 (HEAD_MUTE)
I HEAD_MUTE Not used
18 (GND) G GND Ground
19 (SDA3) I SDA3 I2C Bus(DATA)
J5
20 (SCL3) O SCL3 I2C Bus(CLK)
1(VCC5) O VCC5 Power Supply+5.0V
2(VCC5) O VCC5 Power Supply+5.0V
3(SCART_R) I SCART_R Full ScartRedInput
4(SCART_G) I SCART_G Full ScartGREENInput
5(SCART_B) I SCART_B Full ScartBLUEInput
6(SCART_FB) I SCART_FB Full ScartFAST BLANK Input
7(GND) G GND Ground
8(FSCART_CVBS_IN)
I FSCART_CVBS_INFull ScartCompositeInput
9(GND) G GND Ground
10(HSCART_CVBS_IN) I HSCART_CVBS_INHalfScartCompositeInput
11(GND) G GND Ground
12 (FSCART_ID) I FSCART_ID Full ScartCheck SignalInput
13 (HSCART_ID) I HSCART_ID HalfScartCheck SignalInput
14 (GND) G GND Ground
15 (F_CVBS_OUT) O F_CVBS_OUT Full ScartCompositeOutput
16 (GND) G GND Ground
17 (H_CVBS_OUT) O H_CVBS_OUT HalfScartCompositeOutput
18 (GND) G GND Ground
19(F_CVBS_L_OUT) O F_CVBS_L_OUT Full ScartCompositeLeftSoundOutput
20(F_CVBS_R_OUT) O F_CVBS_R_OUT Full ScartCompositeRightSoundOutput
J1
21 (GND) G GND Ground

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22(H_CVBS_L_OUT) O H_CVBS_L_OUT HalfScartCompositeLeftSoundOutput
23(H_CVBS_R_OUT) O H_CVBS_R_OUT HalfScartCompositeRightSoundOutput
24 (GND) G GND Ground
1(VCC5) O VCC5 Power Supply+5.0V
2(F_SC_L_IN) I F_SC_L_IN Full ScartLeft SoundInput
3(F_SC_R_IN) I F_SC_R_IN Full ScartRightSoundInput
4(GND) G GND Ground
5(H_SC_L_IN) I H_SC_L_IN HalfScartLeftSound Input
6(H_SC_R_IN) I H_SC_R_IN HalfScartRightSoundInput
7(GND) G GND Ground
8(AV_CVBS_IN) I AV_CVBS_IN CompositeVideoInput
9(AV_CVBS_DET) I AV_CVBS_DET CompositeCheck Signal Input
10 (GND) G GND Ground
11(SVIDEO_L_IN) I SVIDEO_L_IN SVIDEO_Left SoundInput
12 (SVIDEO_R_IN) I SVIDEO_R_IN SVIDEO_RightSoundInput
13 (GND) G GND Ground
14 (PC_L_IN) I PC_L_IN Analog RGBLeftSoundInput
15 (PC_R_IN) I PC_R_IN Analog RGBRightSound Input
16 (GND) G GND Ground
17 (DTV_L_IN) I DTV_L_IN Component2(DTV)LeftSoundInput
18 (DTV_R_IN) I DTV_R_IN Component(DTV)RightSoundInput
19 (GND) G GND Ground
20 (DVD_L_IN) I DVD_L_IN Component1(DVD)LeftSoundInput
21 (DVD_R_IN) I DVD_R_IN Component(DVD)RightSoundInput
22 (GND) G GND Ground
23 (AV_L_IN) I AV_L_IN CompositeLeftSoundInput
J2
24 (AV_R_IN) I AV_R_IN CompositeRightSound Input
1(NC)NC
NC NotConnected
2(ANLOG_DIM)
BRIGHTNESS_ADJUST
LCD Brightness Adjustment
3(BLK_ON) BACKLIGHT_ONLCD BacklightON
CON5
4(GND)G GND Ground

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5(ODD0-)O RX0- Negative LVDSDifferentialdatainput.Channel0
6(ODD0+)O RX0+ Positive LVDSDifferentialdatainput.Channel0
7(GND)G GND Ground
8(ODD1-) O RX1- Negative LVDSDifferentialdatainput.Channel1
9(ODD1+) O RX1+ Positive LVDSDifferentialdatainput.Channel1
10 (GND) G GND Ground
11(ODD2-) O RX2- Negative LVDSDifferentialdatainput.Channel2
12 (ODD2+) O RX2+ Positive LVDSDifferentialdatainput.Channel2
13 (GND) G GND Ground
14 (ODDCLK-) O RXCLK- Negative LVDSDifferentialClock input.
15 (ODDCLK+) O RXCLK+ Positive LVDSDifferentialClock input.
16 (GND) G GND Ground
17 (ODD3-) O RX3- Negative LVDSDifferentialdatainput.Channel3
18 (ODD3+) O RX3+ Positive LVDSDifferentialdatainput.Channel3
19 (GND) G GND Ground
20 (NC) NC
NC NotConnected
21 (NC) NC
NC NotConnected
22 (NC) NC
NC NotConnected
23 (GND) G GND Ground
24 (GND) G GND Ground
25 (GND) G GND Ground
26 (VCC 5V) O VCC +5.0VPower Supply
27 (VCC 5V) O VCC +5.0VPower Supply
28 (VCC 5V) O VCC +5.0VPower Supply
29 (VCC 5V) O VCC +5.0VPower Supply
30 (VCC 5V) O VCC +5.0VPower Supply
2. I/O BOARD PINCONFIGURATION
#I :InputPort,O:OutPort,G :Ground,I/O:Input/OutputPort,NC :NotConnected
PinNo I/O Specification Description

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1(VCC5) I VCC5 Power Supply+5.0V
2(VCC5) I VCC5 Power Supply+5.0V
3(SCART_R) O SCART_R Full ScartRedOutput
4(SCART_G) O SCART_G Full ScartGREENOutput
5(SCART_B) O SCART_B Full ScartBLUEOutput
6(SCART_FB) O SCART_FB Full ScartFAST BLANK Output
7(GND) G GND Ground
8(FSCART_CVBS_IN)
O FSCART_CVBS_INFull ScartCompositeOutput
9(GND) G GND Ground
10(HSCART_CVBS_IN) O HSCART_CVBS_INHalfScartCompositeOutput
11(GND) G GND Ground
12 (FSCART_ID) I FSCART_ID Full ScartCheck SignalOutput
13 (HSCART_ID) I HSCART_ID HalfScartCheck SignalOutput
14 (GND) G GND Ground
15 (F_CVBS_OUT) O F_CVBS_OUT Full ScartCompositeOutput
16 (GND) G GND Ground
17 (H_CVBS_OUT) O H_CVBS_OUT HalfScartCompositeOutput
18 (GND) G GND Ground
19(F_CVBS_L_OUT) O F_CVBS_L_OUT Full ScartCompositeLeftSoundOutput
20(F_CVBS_R_OUT) O F_CVBS_R_OUT Full ScartCompositeRightSoundOutput
21 (GND) G GND Ground
22(H_CVBS_L_OUT) O H_CVBS_L_OUT HalfScartCompositeLeftSoundOutput
23(H_CVBS_R_OUT) O H_CVBS_R_OUT HalfScartCompositeRightSoundOutput
J1
24 (GND) G GND Ground
1(VCC5) I VCC5 Power Supply+5.0V
2(F_SC_L_) O F_SC_L_IN Full ScartLeft SoundOutput
3(F_SC_R_) O F_SC_R_IN Full ScartRightSoundOutput
4(GND) G GND Ground
5(H_SC_L_) O H_SC_L_IN HalfScartLeftSoundOutput
6(H_SC_R_) O H_SC_R_IN HalfScartRightSoundOutput
7(GND) G GND Ground
8(AV_CVBS_) O AV_CVBS_IN CompositeVideo Output
9(AV_CVBS_DET) O AV_CVBS_DET CompositeCheck SignalOutput
10 (GND) G GND Ground
11(SVIDEO_L_) O SVIDEO_L_IN SVIDEO_Left SoundOutput
12 (SVIDEO_R_) O SVIDEO_R_IN SVIDEO_RightSoundOutput
13 (GND) G GND Ground
14 (PC_L_) O PC_L_ Analog RGBLeftSoundOutput
15 (PC_R_) O PC_R_ Analog RGBRightSoundOutput
16 (GND) G GND Ground
J2
17 (DTV_L_) O DTV_L_ Component2(DTV)LeftSoundOutput

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18 (DTV_R_) O DTV_R_ Component(DTV)RightSoundOutput
19 (GND) G GND Ground
20 (DVD_L_) O DVD_L_ Component1(DVD)LeftSoundOutput
21 (DVD_R_) O DVD_R_ Component(DVD)RightSoundOutput
22 (GND) G GND Ground
23 (AV_L_) O AV_L_ CompositeLeftSoundOutput
24 (AV_R_) O AV_R_ CompositeRightSoundOutput
3.TUNERBOARD PINCONFIGURATION
#I :InputPort,O:OutPort,G :Ground,I/O:Input/OutputPort,NC :NotConnected
PinNo I/O Specification Description
1(VCC12) I VCC12 Power Supply+12.0V
2(VCC12) I VCC12 Power Supply+12.0V
3(VCC5A) I VCC5A Power Supply+5.0V
4(MSP_L_OUT1)
O MSP_L_OUT1 MSPLEFT SoundOutput1
5(MSP_R_OUT1)
O MSP_R_OUT1 MSPRIGHT SoundOutput1
6(GND) G GND Ground
7(MSP_L_OUT2)
O MSP_L_OUT2 MSPLEFT SoundOutput2
8(MSP_R_OUT2)
O MSP_R_OUT2 MSPRIGHT SoundOutput2
9(GND) G GND Ground
10 (AFT) O AFT AFTLevel
11(TUNER_SIF)
O TUNER_SIF RFTVSoundOutput
12((GND) G GND Ground
13(TUNER_CVBS)
O TUNER_CVBS RFTVVideoOutput
14 (GND) G GND Ground
15 (S_MUTE) O S_MUTE SoundMute
16 (AMP_ST-BY)
O AMP_ST-BY SoundStand-by
17 (HEAD_MUTE)
O HEAD_MUTE Head PhoneMute(사용하지 않음)
18 (GND) G GND Ground
19 (SDA3) O SDA3 I2C Bus(DATA)
J5
20 (SCL3) O SCL3 I2C Bus(CLK)
4. OSDBOARD PINCONFIGURATION
#I :InputPort,O:OutPort,G :Ground,I/O:Input/OutputPort,NC :NotConnected
PinNo I/O Specification Description

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1(POWER) I 3.3V/0V POWERS/WPORT
:DC POWERON_OFF
2(SOURCE)
I 3.3V/0V InputSource Selecting/Enter
3(MENU) O 3.3V/0V OSDMENU Display
4(CH+) O 3.3V/0V TVCHANNELCONTROL(UP)
5(CH-) O 3.3V/0V TVCHANNELCONTROL(DOWN)
6(VOL+) O 3.3V/0V SOUND CONTROL(VOLUME UP)
7(VOL-) O 3.3V/0V SOUND CONTROL(VOLUME DOWN)
CON1
8(GND) G GND Ground
5. IR/LEDBOARD PINCONFIGURATION
#I :InputPort,O:OutPort,G :Ground,I/O:Input/OutputPort,NC :NotConnected
PinNo I/O Specification Description
1(GND) G GND Ground
2(LEDG) O LED_GREEN GREENLEDCONTORL OUTPUT PORT
:High:GreenLEDOn
3(LEDR ) O LED_RED REDLEDCONTORLOUTPUT PORT
:High:RedLEDOn
4(IR) O 5V/ 0V IRRECEIVERSIGNALINPUTPORT
5(GND) G GND Ground
CON1
6(VCC ) I 5V/ 0V OSDB/D5VOutput
6. POWERBOARD PINCONFIGURATION

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7. MODULEBASICCONFIGURATION
[LTA260W1-###(SEC)]

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FACTORYMENU
1. CALIBRATION MENU
FACTORYMODE
n 1.Calibration
: Automatic adjustment of white balance for Analogue input (PC)and Component2 (DTV)
input.
n 2.OptionTable0002
:Initial installation ofOSD.
n 3.Colorcontrol
:Adjustment of contrastand brightness for scaler generating power.
n 4.PW565
: Adjustment of contrast and brightness for scaler input port (CH1 orCH2).
n 5.VPC3230-MAIN
:Valueadjustment for video decoder’s brightnessand contrast, color tickness in
the mainwindow.
n 6.VPC3230-SUB
: Value adjustment for video decoder’s brightness and contrast, color tickness in
the sub window.
n 7.ADC
: Value adjustment for brightness and contrat, color thickness of analogue RGB,
Y,Pb,Pr of AD9883 A/D convertor.
n 8.Heatrun
: The mode when you do aging.
n 9.Version
:It shows the information of Firmware version and Panel.
n 10.Setup
: Installation of TTX languageand video,protocol, logo.
2.CALIBRATION MENU