Daewoo DLP-2622 User manual

DLP-2622 SERVICE MANUAL E-RAE ELECTRONICS
MODEL NAME DOCUMENT NO REVISION NO REVISION DATE PAGE
DLP-2622 ELT040605-002 00 04/06/11 1/71
Service Manual
26inch
LCD TV
Liquid Crystal Display

DLP-2622 SERVICE MANUAL E-RAE ELECTRONICS
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DLP-2622 ELT040605-002 00 04/06/11 2/71
CONTENTS
REVISION ……………………………………………………………..4
SPECIFICATION .. …………………………………………………...5
CONTROL DESCRIPTIONS ……………………………………….7
REMOTE CONTROL BUTTONS ……….. ……………….………..9
TELETEXT FUNCTIONS …………………………..……………….10
PIN CONFIGURATION ………………………………………………11
FACTORY MENU …………………………………………….………20
WHITE BALANCE ADJUSTMENT ….. …………….………….…..31
DESCRIPTION OF SPECIAL FUNCTIONS ……………….… … ..34
CIRCUIT OPERATION & WAVEFORM ……………………….…..36
MODULE POWER SEQUENCE …………………...….…………..43
MODULE PRECAUTIONS ………………………………………….45
EXPLODED OVERVIEW ……………………………………………47
REPLACEMENT PARTS LIST(exploded overview). …………..48

DLP-2622 SERVICE MANUAL E-RAE ELECTRONICS
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DISASSEMBLY PROCEDURE ……………………………………...50
TROUBLE SHOOTING ……………………………………………....54
REPLACEMENT PARTS LIST ………………………………………56
RS-232C COMMUNICATION ………………………………………..65
WIRING DIAGRAM ………….... ……………………………….…….70
BLOCK DIABRAM ……………………………………………………71

DLP-2622 SERVICE MANUAL E-RAE ELECTRONICS
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REVISION HISTORY
VERSION DATA DESCRIPTION NOTE

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DLP-2622 ELT040605-002 00 04/06/11 5/71
Note : Specification and others are subject to change without notice for improvement.
TV
1.Input Signal :
PAL
SECAM
SD,HD
VGA ~SXGA
2. Tuner : PAL
SECAM
3. Input Voltage : AC 100V ~ 240V, @ 50/60Hz, 2A
4. Power Consumption : 140W
5. LCD Module : LTA260W1 -### (SEC)
6. Speaker Impedance : 8Ω
7. Sound Output : 7W + 7W (Max)
8. Feature : -AV Input
-Component1 Input (DVD)
-Component2 Input (DTV)
-D-SUB (Analog RGB 15 pin)
-S-Video Input
-Composite Input
-SCART1 Input (Full/RGB,CVBS)
-SCART2 Input (Half/CVBS)
-Tuner (PAL,SECAM)
-Audio Input (Composite, Component 1/2, S-Video, PC)
-RS-232C (9 pin)
9. Function :
-ZOOM
-PIP
-PBP (4:3,16:9)
-MTS
-TELETEXT

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10. External Interface
1) AV / COMPONENT / ANALOG RGB Input
ITEM MIN TYP MAX UNIT
AV Video Input Level 0.85 1.00 1.15 Vpp
AV Sync Input Level 0.24 0.29 0.32 Vpp
AV Burst Input Level 0.14 0.28 0.35 Vpp
AV Video Input Level 0.47 0.63 0.79 V
AV Audio Input 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 RGB Level 0.6 0.7 0.8 Vpp
H/V Sync Input Level 3.5 3.7 4.5 Vpp
3) COMPONENT Mode (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 DISPLAY Mode
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

DLP-2622 SERVICE MANUAL E-RAE ELECTRONICS
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CONTROL DESCRIPTIONS

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REMOTE CONTROL BUTTONS

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Teletext Function

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PIN CONFIGURATION
1. A/D BOARD PIN CONFIGURATION
# I : Input Port, O : Out Port, G : Ground, I/O : Input / Output Port, NC : Not Connected
Pin No I/O Specification Description
1 ( +12V ) I+12V MAIN B/D 12V Input
2 ( +12V ) I+12V MAIN B/D 12V Input
3 ( AC_DET ) I+3.3V AC_DETECT PIN (
입전시 :high, 정전시 :low)
4 ( GND ) GGND Ground
5 ( GND ) GGND Ground
6 ( GND ) GGND Ground
7 ( S5V ) IS5V Stand-by 5V Input
8 ( GND ) GGND Ground
9 ( BRITE_ADJ ) O
BRIGHTNESS_ADJUST
LCD Brightness Adjustment(Min:3V , Max:0V)
10 ( GND ) GGND Ground
11 ( BKL_ON ) OBACKLIGHT_ON LCD Backlight ON (ON:high, OFF:low)
CON4
12(POWER_
ON/OFF ) OPOWER_ON/OFF POWER ON_OFF Control ( ON:low, OFF:high)
1 ( GND ) GGND Ground
2 ( LEDG ) OLED_GREEN GREEN LED CONTORL OUTPUT PORT
: High : Green LED On
3 ( LEDR ) OLED_RED RED LED CONTORL OUTPUT PORT
: High : Red LED On
4 ( IR ) I5V / 0V
IR RECEIVER SIGNAL INPUT PORT
5 ( GND ) GGND Ground
CON2
6 ( VCC ) O5V / 0V OSD B/D 5V Output
1 ( POWER ) I3.3V / 0V POWER S/W PORT
:DC POWER ON_OFF
2 ( SOURCE )
I3.3V / 0V Input Source Selecting/Enter
3 ( MENU ) I3.3V / 0V OSD MENU Display
4 ( CH+ ) I3.3V / 0V TV CHANNEL CONTROL(UP)
5 ( CH-) I3.3V / 0V TV CHANNEL CONTROL(DOWN)
6 ( VOL+ ) I3.3V / 0V SOUND CONTROL(VOLUME UP)
7 ( VOL-) I3.3V / 0V SOUND CONTROL(VOLUME DOWN)
CON1
8 ( GND ) GGND Ground

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1 ( VCC12) OVCC12 Power Supply +12.0V
2 ( VCC12) OVCC12 Power Supply +12.0V
3 (VCC5A) OVCC5A Power Supply +5.0V
4 (MSP_L_OUT1)
OMSP_L_OUT1 MSP LEFT Sound Output1
5 (MSP_R_OUT1)
OMSP_R_OUT1 MSP RIGHT Sound Output1
6 (GND) GGND Ground
7 (MSP_L_OUT2)
OMSP_L_OUT2 MSP LEFT Sound Output2
8 (MSP_R_OUT2)
OMSP_R_OUT2 MSP RIGHT Sound Output2
9 (GND) GGND Ground
10 (AFT) IAFT AFT Level
11 (TUNER_SIF) ITUNER_SIF RF TV Sound Input
12( (GND) GGND Ground
13 (TUNER_CVBS)
ITUNER_CVBS RF TV Video Input
14 (GND) GGND Ground
15 (S_MUTE) OS_MUTE Sound Mute
16 (AMP_ST-BY)
OAMP_ST-BY Sound Stand-by
17 (HEAD_MUTE)
IHEAD_MUTE Not used
18 (GND) GGND Ground
19 (SDA3) ISDA3 I2C Bus(DATA)
J5
20 (SCL3) OSCL3 I2C Bus(CLK)
1 (VCC5) OVCC5 Power Supply +5.0V
2 (VCC5) OVCC5 Power Supply +5.0V
3 (SCART_R) ISCART_R Full Scart Red Input
4 (SCART_G) ISCART_G Full Scart GREEN Input
5 (SCART_B) ISCART_B Full Scart BLUE Input
6 (SCART_FB) ISCART_FB Full Scart FAST BLANK Input
7 (GND) GGND Ground
8 (FSCART_CVBS_IN)
IFSCART_CVBS_IN Full Scart Composite Input
9 (GND) GGND Ground
10(HSCART_CVBS_IN)
IHSCART_CVBS_IN Half Scart Composite Input
11 (GND) GGND Ground
12 (FSCART_ID)
IFSCART_ID Full Scart Check Signal Input
13 (HSCART_ID)
IHSCART_ID Half Scart Check Signal Input
14 (GND)
GGND Ground
15 (F_CVBS_OUT)
OF_CVBS_OUT Full Scart Composite Output
16 (GND) GGND Ground
17 (H_CVBS_OUT)
OH_CVBS_OUT Half Scart Composite Output
18 (GND) GGND Ground
J1
19 (F_CVBS_L_OUT)
OF_CVBS_L_OUT Full Scart Composite Left Sound Output

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20 (F_CVBS_R_OUT)
OF_CVBS_R_OUT Full Scart Composite Right Sound Output
21 (GND) GGND Ground
22 (H_CVBS_L_OUT)
OH_CVBS_L_OUT Half Scart Composite Left Sound Output
23 (H_CVBS_R_OUT)
OH_CVBS_R_OUT Half Scart Composite Right Sound Output
24 (GND) GGND Ground
1 (VCC5) OVCC5 Power Supply +5.0V
2 (F_SC_L_IN) IF_SC_L_IN Full Scart Left Sound Input
3 (F_SC_R_IN) IF_SC_R_IN Full Scart Right Sound Input
4 (GND) GGND Ground
5 (H_SC_L_IN) IH_SC_L_IN Half Scart Left Sound Input
6 (H_SC_R_IN) IH_SC_R_IN Half Scart Right Sound Input
7 (GND) GGND Ground
8 (AV_CVBS_IN)
IAV_CVBS_IN Composite Video Input
9 (AV_CVBS_DET)
IAV_CVBS_DET Composite Check Signal Input
10 (GND) GGND Ground
11 (SVIDEO_L_IN)
ISVIDEO_L_IN SVIDEO_Left Sound Input
12 (SVIDEO_R_IN)
ISVIDEO_R_IN SVIDEO_Right Sound Input
13 (GND) GGND Ground
14 (PC_L_IN) IPC_L_IN Analog RGB Left Sound Input
15 (PC_R_IN) IPC_R_IN Analog RGB Right Sound Input
16 (GND) GGND Ground
17 (DTV_L_IN) IDTV_L_IN Component2(DTV) Left Sound Input
18 (DTV_R_IN) IDTV_R_IN Component(DTV) Right Sound Input
19 (GND) GGND Ground
20 (DVD_L_IN) IDVD_L_IN Component1(DVD) Left Sound Input
21 (DVD_R_IN) IDVD_R_IN Component(DVD) Right Sound Input
22 (GND) GGND Ground
23 (AV_L_IN) IAV_L_IN Composite Left Sound Input
J2
24 (AV_R_IN) IAV_R_IN Composite Right Sound Input

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1 (NC) NC NC Not Connected
2 (ANLOG_DIM)
BRIGHTNESS_ADJUST
LCD Brightness Adjustment
3 (BLK_ON) BACKLIGHT_ON LCD Backlight ON
4 (GND) GGND Ground
5 (ODD0-) ORX0-Negative LVDS Differential data input. Channel 0
6 (ODD0+) ORX0+ Positive LVDS Differential data input. Channel 0
7 (GND) GGND Ground
8 (ODD1-) ORX1-Negative LVDS Differential data input. Channel 1
9 (ODD1+) ORX1+ Positive LVDS Differential data input. Channel 1
10 (GND) GGND Ground
11 (ODD2-) ORX2-Negative LVDS Differential data input. Channel 2
12 (ODD2+) ORX2+ Positive LVDS Differential data input. Channel 2
13 (GND) GGND Ground
14 (ODDCLK-) ORXCLK-Negative LVDS Differential Clock input.
15 (ODDCLK+) ORXCLK+ Positive LVDS Differential Clock input.
16 (GND) GGND Ground
17 (ODD3-) ORX3-Negative LVDS Differential data input. Channel 3
18 (ODD3+) ORX3+ Positive LVDS Differential data input. Channel 3
19 (GND) GGND Ground
20 (NC) NC NC Not Connected
21 (NC) NC NC Not Connected
22 (NC) NC NC Not Connected
23 (GND) GGND Ground
24 (GND) GGND Ground
25 (GND) GGND Ground
26 (VCC 5V) OVCC +5.0V Power Supply
27 (VCC 5V) OVCC +5.0V Power Supply
28 (VCC 5V) OVCC +5.0V Power Supply
29 (VCC 5V) OVCC +5.0V Power Supply
CON5
30 (VCC 5V) OVCC +5.0V Power Supply

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2. I/O BOARD PIN CONFIGURATION
# I : Input Port, O : Out Port, G : Ground, I/O : Input / Output Port, NC : Not Connected
Pin No I/O Specification Description
1 (VCC5) IVCC5 Power Supply +5.0V
2 (VCC5) IVCC5 Power Supply +5.0V
3 (SCART_R) OSCART_R Full Scart Red Output
4 (SCART_G) OSCART_G Full Scart GREEN Output
5 (SCART_B) OSCART_B Full Scart BLUE Output
6 (SCART_FB) OSCART_FB Full Scart FAST BLANK Output
7 (GND) GGND Ground
8 (FSCART_CVBS_IN)
OFSCART_CVBS_IN Full Scart Composite Output
9 (GND) GGND Ground
10(HSCART_CVBS_IN)
OHSCART_CVBS_IN Half Scart Composite Output
11 (GND) GGND Ground
12 (FSCART_ID)
IFSCART_ID Full Scart Check Signal Output
13 (HSCART_ID)
IHSCART_ID Half Scart Check Signal Output
14 (GND)
GGND Ground
15 (F_CVBS_OUT)
OF_CVBS_OUT Full Scart Composite Output
16 (GND) GGND Ground
17 (H_CVBS_OUT)
OH_CVBS_OUT Half Scart Composite Output
18 (GND) GGND Ground
19 (F_CVBS_L_OUT)
OF_CVBS_L_OUT Full Scart Composite Left Sound Output
20 (F_CVBS_R_OUT)
OF_CVBS_R_OUT Full Scart Composite Right Sound Output
21 (GND) GGND Ground
22 (H_CVBS_L_OUT)
OH_CVBS_L_OUT Half Scart Composite Left Sound Output
23 (H_CVBS_R_OUT)
OH_CVBS_R_OUT Half Scart Composite Right Sound Output
J1
24 (GND) GGND Ground
1 (VCC5) IVCC5 Power Supply +5.0V
2 (F_SC_L_) OF_SC_L_IN Full Scart Left Sound Output
3 (F_SC_R_) OF_SC_R_IN Full Scart Right Sound Output
4 (GND) GGND Ground
5 (H_SC_L_) OH_SC_L_IN Half Scart Left Sound Output
6 (H_SC_R_) OH_SC_R_IN Half Scart Right Sound Output
7 (GND) GGND Ground
8 (AV_CVBS_)
OAV_CVBS_IN Composite Video Output
9 (AV_CVBS_DET)
OAV_CVBS_DET Composite Check Signal Output
10 (GND) GGND Ground
J2
11 (SVIDEO_L_)
OSVIDEO_L_IN SVIDEO_Left Sound Output

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12 (SVIDEO_R_)
OSVIDEO_R_IN SVIDEO_Right Sound Output
13 (GND) GGND Ground
14 (PC_L_ ) OPC_L_ Analog RGB Left Sound Output
15 (PC_R_) OPC_R_ Analog RGB Right Sound Output
16 (GND) GGND Ground
17 (DTV_L_) ODTV_L_ Component2(DTV) Left Sound Output
18 (DTV_R_) ODTV_R_ Component(DTV) Right Sound Output
19 (GND) GGND Ground
20 (DVD_L_) ODVD_L_ Component1(DVD) Left Sound Output
21 (DVD_R_) ODVD_R_ Component(DVD) Right Sound Output
22 (GND) GGND Ground
23 (AV_L_) OAV_L_ Composite Left Sound Output
24 (AV_R_) OAV_R_ Composite Right Sound Output
3. TUNER BOARD PIN CONFIGURATION
# I : Input Port, O : Out Port, G : Ground, I/O : Input / Output Port, NC : Not Connected
Pin No I/O Specification Description
1 ( VCC12) IVCC12 Power Supply +12.0V
2 ( VCC12) IVCC12 Power Supply +12.0V
3 (VCC5A) IVCC5A Power Supply +5.0V
4 (MSP_L_OUT1)
OMSP_L_OUT1 MSP LEFT Sound Output1
5 (MSP_R_OUT1)
OMSP_R_OUT1 MSP RIGHT Sound Output1
6 (GND) GGND Ground
7 (MSP_L_OUT2)
OMSP_L_OUT2 MSP LEFT Sound Output2
8 (MSP_R_OUT2)
OMSP_R_OUT2 MSP RIGHT Sound Output2
9 (GND) GGND Ground
10 (AFT) OAFT AFT Level
11 (TUNER_SIF) OTUNER_SIF RF TV Sound Output
12( (GND) GGND Ground
13 (TUNER_CVBS)
OTUNER_CVBS RF TV Video Output
14 (GND) GGND Ground
15 (S_MUTE) OS_MUTE Sound Mute
16 (AMP_ST-BY)
OAMP_ST-BY Sound Stand-by
17 (HEAD_MUTE)
OHEAD_MUTE Head Phone Mute(
사용하지 않음 )
18 (GND) GGND Ground
19 (SDA3) OSDA3 I2C Bus(DATA)
J5
20 (SCL3) OSCL3 I2C Bus(CLK)

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4. OSD BOARD PIN CONFIGURATION
# I : Input Port, O : Out Port, G : Ground, I/O : Input / Output Port, NC : Not Connected
Pin No I/O Specification Description
1 ( POWER ) I3.3V / 0V POWER S/W PORT
:DC POWER ON_OFF
2 ( SOURCE )
I3.3V / 0V Input Source Selecting/Enter
3 ( MENU ) O3.3V / 0V OSD MENU Display
4 ( CH+ ) O3.3V / 0V TV CHANNEL CONTROL(UP)
5 ( CH-) O3.3V / 0V TV CHANNEL CONTROL(DOWN)
6 ( VOL+ ) O3.3V / 0V SOUND CONTROL(VOLUME UP)
7 ( VOL-) O3.3V / 0V SOUND CONTROL(VOLUME DOWN)
CON1
8 ( GND ) GGND Ground
5. IR/LED BOARD PIN CONFIGURATION
# I : Input Port, O : Out Port, G : Ground, I/O : Input / Output Port, NC : Not Connected
Pin No I/O Specification Description
1 ( GND ) GGND Ground
2 ( LEDG ) OLED_GREEN GREEN LED CONTORL OUTPUT PORT
: High : Green LED On
3 ( LEDR ) OLED_RED RED LED CONTORL OUTPUT PORT
: High : Red LED On
4 ( IR ) O5V / 0V
IR RECEIVER SIGNAL INPUT PORT
5 ( GND ) GGND Ground
CON1
6 ( VCC ) I5V / 0V OSD B/D 5V Output

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6. POWER BOARD PIN CONFIGURATION

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7. MODULE BASIC CONFIGURATION
[LTA260W1 -### (SEC)]

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FACTORY MENU
1. CALIBRATION MENU
FACTORY MODE
n 1. Calibration
: Automatic adjustment of white balance for Analogue input (PC) and Component2 (DTV)
input.
n 2. Option Table 0002
: Initial installation of OSD.
n 3. Color control
: Adjustment of contrast and brightness for scaler generating power.
n 4. PW565
: Adjustment of contrast and brightness for scaler input port (CH1 or CH2).
n 5. VPC3230-MAIN
: Value adjustment for video decoder’s brightness and contrast, color tickness in
the main window.
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 language and video, protocol, logo.