Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV VN30EO CHASSIS LW30A23W samsung_vn30eo_chassis_lw30a23w_lcd_tv_sm_134
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LCD-TV
Chassis Model
VN30EO LW30A23W
SERVICE Manual
LCD-TV CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignment & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. PCB Layout
11. Schematic Diagrams
12. Cosmetic Specification for LCD TV
This Service Manual is a property of Samsung Samsung Electronics Co.,Ltd.
Electronics Co., Ltd. 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Kyungki-Do, Korea,443-742
Any unauthorized use of Manual can be punished Printed in Korea
under applicable International and/or domestic law. P/N : BN82-00097H-00
URL : http://itself.sec.samsung.co.kr/
8 Block Diagram
This Document can not be used without Samsung's authorization.
8-1-1 Worldwide Full Multi-System Block diagram
LW30A23W 8-1
8 Block Diagrams
8-1-2 Sound Block diagram
8-2 LW30A23W
8 Block Diagrams
8-1-3 Video Block diagram
t
LW30A23W 8-3
8 Block Diagrams
8-1-4 Power Block diagram
~
8-4 LW30A23W
LW30A23W
SW_SMPS AGND
GND
GND
GND
GND
VCC5A
VCC5A
VCC5A
VCC12A
GND STD_VCC3B
VCC12BS
VCC12BS
VCC12BS
GND_AMP
GND_AMP
GND_AMP
STD_VCCGA VCC5B
CN505
AGND AGND
CH+_OUT IR
VOL+_OUT LED_GRN
9 Wiring Diagram
BUZER_IN LED_RED
AGND AGND
CN800
CH-_OUT AV_CVBS
VOL-_OUT AGND
SOURCE_OUT SVHS_Y
MENU_OUT AGND
AGND SVHS_C
STD_VCC5B AGND
VCC5DDC SC1_RGB_FB
SC1_R_SC1_SVHS_CI AGND
SC1_G Y_D1
SC1_B_SC1_SVHS_C0 AGND
CN506
AGND PB_D1
SC1_CVBS_IN PR_D1
AGND AGND
SC1_CVBS_OUT Y_D2
AGND AGND
SC2_CVBS_IN PB_D2
AGND PR_D2
NC
SC2_SVHS_CI AGND NC
AGND Y_COMP1
NC
CN510
SC2_CVBS_OUT AGND
NC
ANGD PB_COMP1 NC
SC2_SVHS_CO PR_COMP1 NC
NC
GND
Y_COMP2 AGND TXOUT 3+
AGND SC1_L_OUT TXOUT 3-
PB_COMP2 SC1_R_OUT TXCLKOUT +
CN509
PR_COMP2 AGND TXCLKOUT -
D4_1_CON1 SC2_L_IN GND
D4_1_CONT2(SC1_S) SC2_R_IN GND
D4_1_CONT3 AGND TXOUT 2+
D4_2_CONT1 SC2_L_OUT TXOUT 2-
D4_2_CONT2(SC2_S) SC2_R_OUT TXOUT 1+
D4_2_CONT3 AGND TXOUT 1-
AV_L COMP1_L TXOUT 0+
AV_R COMP1_R TXOUT 0-
GND AGND GND
SC1_L_IN COMP2_L GND
SC1_R_IN COMP2_R GND
GND
GND
VCC5P
PC_L DDC_DVI_SDAS VCC5P
PC_R IDENT_PC VCC5P
AGND RX0- VCC5P
CN507
COAXIAL_IN RX0+ VCC5P
AGND DGND
OPTICAL_IN RX1-
AGND RX1+
PC_RED DGND
PC_GREEN RX2-
PC_BLUE RX2+
AGND DGND
PC_DDC_HSYNC RXC-
PC_DDC_VSYNC RXC+
AGND DGND
DDC_DVI_SCLS DDC_VCC5D
GND_AMP MAIN_R_OUT1
HP_IDENT MAIN_R_OUT2
GND_AMP GND_AMP
CN508
HP_OUT_L SUR_L_OUT1
GND_AMP SUR_L_OUT2
HP_OUT_R GND_AMP
GND_AMP SUR_R_OUT1
WOOFER_OUT SUR_R_OUT2
GND_AMP GND_AMP
MAIN_L_OUT1 CENTER_OUT1
MAIN_L_OUT2 CENTER_OUT2
GND_AMP GND_AMP
9-1
9 Wiring Diagrams
Memo
9-2 LW30A23W
5 Troubleshooting
5-1 No Power
Does proper DC 6V appear at No WAVEFORMS
1 Check sub power PCB.
Pin 1 of power S/W board CN130?
1 DC 6V
Yes
Does proper DC 6V appear at No
1 Check S/W board ass'y.
Pin 3 of input board CN144?
Yes 2 DC 5V
Does proper DC 6V appear at No
1 Check input board.
Pin 3 main board CN505?
Yes
3 DC 3V
Does proper DC 5V appear at No
2 Check IC800 and main power.
Pin 4 main board IC800?
Yes
Does proper DC 3 V appear at No
3 Check IC952, IC955 and IC958.
Pin 3 main board IC801?
Yes
Check IC917, IC902, IC901 and IC900.
LW30A23W 5-1
5 Troubleshooting
5-2 No Video (CVBS)
The power LED turns green.
Does proper signal appear at No
4 Check cable and input board.
Pin 26 of input board CN136?
Yes
Does proper signal appear at No
4 Check IC700 and related circuit.
Pin 15 of main board IC700?
Yes
6 Does proper clock pulse at Pin 3 of No
5
7 main board IC200 and communicates Check IC200 and related circuit.
with Pin 178 and 179?
WAVEFORMS
4 CVBS Signal 5 IC200,#3 Clock Signal 6 IC200,#178 Communichion Data Signal 7 IC200,#179 Communichion Clock Signal
5-2 LW30A23W
5 Troubleshooting
Yes
Does proper clock pulse at
9 No
8 Pin 205 of main board IC434 and Check IC400 and related circuit.
10
communicates with Pin 1 and 2?
Yes
Does proper clock pulse at
12 No
11 Pin 31, 27 and 28 of Check IC434 and related circuit.
13
main board IC500?
Yes
Does proper clock pulse at Pin 37, No
14
39 and 40 of main board IC500? Check IC500 and related circuit.
Yes
Replace LCD panel.
WAVEFORMS
8 IC434,#205 Clock Signal 9 IC400,IC434 Communichion Data Signal 10 IC400,IC434 Communichion Clock Signal 11 IC500,#31 Clock Signal
12 IC500,#27 H-Sync 13 IC500,#28 V-Sync 14 IC500,#37,39,40 Clock Output Signal
LW30A23W 5-3
5 Troubleshooting
5-3 No Video (S-Video)
The power LED turns green.
Does proper signal No
15 appear at Pin 26 and 28 of Check cable and input board.
main board CN505?
Yes
Does proper signal No
15 appear at Pin 18 and 19 of Check IC701 and related circuit.
main board IC701?
Yes
6 Does proper clock pulse at Pin 3 of No
5
7 main board IC200 and communicates Check IC200 and related circuit.
with Pin 178 and 179?
WAVEFORMS
5 IC200,#3 Clock Signal 6 IC200,#178 Communichion Data Signal 7 IC200,#179 Communichion Clock Signal 15 S-Video signal,CN505,#26(Y),28(C),
IC701,#18(Y),19(C)
5-4 LW30A23W
5 Troubleshooting
Yes
Does proper clock pulse at
9 No
8
10
Pin 205 of main board IC434 and Check IC400 and related circuit.
communicates with Pin 1 and 2?
Yes
Does proper clock pulse at No
12
11
13
Pin 31, 27 and 28 of Check IC434 and related circuit.
main board IC500?
Yes
Does proper clock No
14 pulse at Pin 37, 39 and 40 of Check IC500 and related circuit.
main board IC500?
Yes
Replace LCD panel.
WAVEFORMS
8 IC434,#205 Communichion Clock Signal 9 IC400,IC434 Communichion Data Signal 10 IC400,IC434 Communichion Clock Signal 11 IC500,#31 Clock Signal
12 IC500,#27 H-Sync 13 IC500,#28 V-Sync 14 IC500,#37,39,40 Clock Output Signal
LW30A23W 5-5
5 Troubleshooting
5-4 No Screen (DVD)
The power LED turns green.
Does proper signal No
17
16
18
appear at Pin 4, 14 and 15 of Check IC102 and related circuit.
main board IC102?
Yes
Does proper signal No
17
16
18
appear at Pin 16, 17 and 18 of Check IC702 and related circuit.
main board IC702?
Yes
Does proper synchronization pulse No
19 21
20 22
at Pin 64 and 66 of main board IC202 and Check IC202 and related circuit.
communicates with Pin 56 and 57?
WAVEFORMS
16 DTV,DVD,Y Signal 17 DTV,DVD,Pb(Cb) Signal 18 DTV,DVD,Pr(Cr) Signal 19 IC202,#66,H-Sync Output Signal
IC101,IC102,#14,IC702,#18 IC101,IC102,#15,IC702,#17 IC101,IC102,#4,IC702,#16
20 IC202,#64,H-Sync Output Signal 21 IC202,#56 Communichion Data Signal 22 IC202,#57 Communichion Clock Signal
5-6 LW30A23W
5 Troubleshooting
Yes
Does proper synchronization No
23
24
pulse at Pin 30, 31 of Check IC205 and related circuit.
main board IC202?
Yes
Does proper clock No
25 pulse at Pin 71~78, 2~10 of Check IC202 and related circuit.
main board IC202?
Yes
Does proper clock pulse No
6
5
7 at Pin 3 of main board IC200 and Check IC200 and related circuit.
communicates with Pin 178 and 179?
WAVEFORMS
5 IC200,#3 Clock Signal 6 IC200,#178 Communichion Data Signal 7 IC200,#179 Communichion Clock Signal 23 IC202,#30 H-Sync intput Signal
24 IC202,#31 V-Sync Intput Signal 25 IC202,#71~78, 2~10 Data Puls Signal
LW30A23W 5-7
5 Troubleshooting
Yes
Does proper clock pulse No
9
8
10
at Pin 205 of main board IC434 and Check IC400 and related circuit.
communicates with Pin 1 and 2?
Yes
Does proper clock No
12
11
13
pulse at Pin 31, 27, 28 of Check IC434 and related circuit.
main board IC500?
Yes
Does proper clock No
14 pulse at Pin 37, 39, 40 of Check IC500 and related circuit.
main board IC500?
Yes
Replace LCD panel.
WAVEFORMS
8 IC434,#205 Communichion Clock Signal 9 IC400,IC434 Communichion Data Signal 10 IC400,IC434 Communichion Clock Signal 11 IC500,#31 Clock Signal
12 IC500,#27 H-Sync 13 IC500,#28 V-Sync 14 IC500,#37,39,40 Clock Output Signal
5-8 LW30A23W
5 Troubleshooting
5-5 No Screen (D-TV)
The power LED turns green.
Does proper signal No
17
16
18 appear at Pin 4, 14 and 15 of Check cable and input board.
main board CN101?
Yes
Does proper signal No
17
16
18
appear at Pin 16, 17 and 18 of Check IC702 and related circuit.
main board IC702?
Yes
Does proper synchronization pulse No
19 21
at Pin 64 and 66 of main board IC202 and Check IC202 and related circuit.
20 22
communicates with Pin 56 and 57?
Yes
Does proper synchronization No
23
pulse at Pin 30, 31 of Check IC205 and related circuit.
24
main board IC202?
16 DTV,DVD,Y Signal
IC101,IC102,#14,IC702,#18
WAVEFORMS
17 DTV,DVD,Pb(Cb) Signal 18 DTV,DVD,Pr(Cr) Signal 19 IC202,#66,H-Sync Output Signal 20 IC202,#64,H-Sync Output Signal
IC101,IC102,#15,IC702,#17 IC101,IC102,#4,IC702,#16
21 IC202,#56 Communichion Data Signal 22 IC202,#57 Communichion Clock Signal 23 IC202,#30 H-Sync intput Signal 24 IC202,#31 V-Sync intput Signal
LW30A23W 5-9
5 Troubleshooting
Yes
Does proper clock No
25 pulse at Pin 71~78, 2~10 of Check IC202 and related circuit.
main board IC202?
Yes
Does proper clock pulse
6 No
5 at Pin 3 of main board IC200 and Check IC200 and related circuit.
7
communicates with Pin 178 and 179?
Yes
Does proper clock No
12
11
13 pulse at Pin 31, 27, 28 of Check IC434 and related circuit.
main board IC500?
Yes
Does proper clock No
14 pulse at Pin 37, 39, 40 of Check IC500 and related circuit.
main board IC500?
Yes
Replace LCD panel.
WAVEFORMS
5 IC200,#3 Clock Signal 6 IC200,#178 Communichion Data Signal 7 IC200,#179 Communichion Clock Signal 11 IC500,#31 Clock Signal
12 IC500,#27 H-Sync 13 IC500,#28 V-Sync 14 IC500,#37,39,40 Clock Output Signal 25 IC202,#71~78, 2~10 Data Puls Signal
5-10 LW30A23W
5 Troubleshooting
5-6 No Screen [PC signal(Along)]
27
Does proper input signal No WAVEFORMS
26
28
appear at Pin 8, 9, 10, 12 and Check cable and input board.
13 of main board CN507? 9 IC400,IC434 Communichion Data Signal
Yes
Does proper signal appear at No
27
28
Pin 3, 6 (H-sync), 8 and 10 Check IC907 and related circuit.
(V-sync) main board IC907?
10 IC400,IC434 Communichion Clock Signal
Yes
27 Does proper input signal appear No
Check IC903 and related circuit.
28 at Pin 6, 8 of main board IC903?
Yes
14 IC500,#37,39,40 Clock Output Signal
Does proper communicate No
9
pulse appear at Pin R410 and Check IC400 and related circuit.
10
R457 of main board IC400?
Yes
Does proper signal No
14 appear at Pin 37, 39, 40 and 37 Check IC500 and related circuit. 26 CN507 PC RGB Signal #8,9,10
of main board IC500?
28 PC V-Sync Input Signal 27 PC H-Sync Input Signal
LW30A23W 5-11
5 Troubleshooting
5-7 No Screen [PC signal(Digital)]
Does proper input signal
No WAVEFORMS
29 appear at Pin 18, 19, 21, 22, 24, 25, Check cable and input board.
27 and 28 of main board CN507? 9 IC400,IC434 Communichion Data Signal
Yes
Does proper signal appear at No
27
28
Pin 48 (H-sync) and 47 (V-sync) Check IC300 and related circuit.
main board IC300?
10 IC400,IC434 Communichion Clock Signal
Yes
27 Does proper input signal appear No
Check IC903 and related circuit.
28 at Pin 4, 10 of main board IC903?
Yes
27 PC H-Sync Input Signal
Does proper communicate No
9
10
pulse appear at Pin R410 and Check IC400 and related circuit.
R457 of main board IC400?
Yes
Does proper signal No
appear at Pin 39, 40 and 37 of Check IC500 and related circuit. 28 PC V-Sync Input Signal
main board IC500?
29 PC Digtal Input Signal
#18,19,21,22,24,25,27,28
5-12 LW30A23W
4 Alignments and Adjustments
4-1 Factory Mode Adjustments
4-1-1 Entering Factory Mode
1. To enter "Service Mode" Press the remote -control keys in this sequence :
- If you do not have Factory remote - contro
- If you have Factory remote - control
4-1-2 Factory Mode Tree
LW30A23W 4-1
4 Alignments and Adjustments
4-2 LW30A23W
4 Alignments and Adjustments
4-2 SUB Menu 1
- In sub menu 1,you can adjust the white balance.
- As the adjustment and data values differ depending on input sources, different adjustments are required
for RF, DVD, DTV and PC modes.
- Optimum condition data for each mode are saved as default values. (Refer to Table 2, W/B default value)
- As the RF mode is applied with the same values as for video and S-VHS, adjustment can be made in any
of RF, video and S-VHS modes.
Table 4-1 White Balance Setting Conditions
4-2-1 Conditions for Measurement
On the basis of ToshibaABL Pattern
Optical measuring device : CA210
4-2-2 Method of Adjustment
1. Set the input to the mode in which the adjustment will be made (RF/DVD/DTV/PC).
The sequence of adjustment is RF DVD DTV PC.
2. Enter factory video adjust, confirm the data,and if it differs from the default values, perform video
recall and return to factory video adjust.
*Video recall restores the values in video adjust to the default.
3. Adjust the low value. (Refer to table 2 in adjustment positions by mode)
- Adjust green cutoff to set the Y value (except for PC).
- Adjust red cutoff and blue cutoff to the color coordinates.
*For the high value, the gain value is fixed to the default and is not adjusted.
Low value
measurement point
Toshiba ABL Pattern
LW30A23W 4-3
4 Alignments and Adjustments
4-2-3 30" Fatory Mode
4-4 LW30A23W
4 Alignments and Adjustments
4-2-3 30" Fatory Mode
* The color default value on the menu screen of DVI, DTV mode is changed from 55 to 80
(It is including OSD).
Table 4-2 Default Value
LW30A23W 4-5
4 Alignments and Adjustments
4-3 SUB Menu 2 (Panel Adjustment)
You can adjust the brightness of the panel lamps and the woofer sound output.
Default Adjustment Remark
ANA Dimming You can alter the brightness by adjusting the lamp operating current.
208 (d0) FIX
*The life of the lamps is affected by adjustment,so fix the value at the default.
255 (ff) FIX You can adjust the brightness by adjusting the lamp operating PWM.
PWM Dimming
*The life of the lamps is affected by adjustment,so fix the value at the default.
Adjusts the woofer output frequency characteristics.
SW Fiter 220 Hz FIX
Allows the woofer output up to 220 Hz.
Bus Sotp
Default Adjustment Remark
If set to on,12C communication will stop.
ANA Dimming 208 (d0) FIX As it is an option for developers,do not change the value.
The default is restored when power is off.
4-4 SUB Menu 3 (Option)
You can add or delete Options.
Default Adjustment Remark
Option to select the relevant MICOM for different panel size. This option is set
Inch 32" or 40" FIX
according the panel size.
FIX CW : Worldwide color system (Europe area) PAL, SECAM, SECAM-L , NTSC 4.43
System CW
CZ : Color system PAL, SECAM, NTSC 4.43
This option is selected for different panel types with each relevant default settings
for video adjustment. Each panel supplier has different panel optical characteristics,
Panel Panel 0 FIX which may have different default settings for video adjustment.
Panel 0 : Samsung AMLCD Panel
Others : None
On : OSD with Help bar
Help Off FIX
Off : OSD without Help bar
DNIe Demo On FIX Option to demonstrate DNle function.
TTX TOP Off FIX Option for' TTXTOP'- type search
External power on / off : Automatically powered with the set
Auto power On FIX Shipping : on
*Do not change the fixed values without good reason .
Displays the current CheckSum size of the MICOM.
CheckSum xxxx
(Varies depending on program update)
Initializes the data in the MICOM. (Set to default value)
Reset
The values set in factory mode remain unchanged.
Displays the panel running hours.
LCD ON Time OHr It is reset (0Hr) at the factory or when the MICOM is replaced .
04/02 T-VENUSN01-093 Displays the MICOM program version.
4-6 LW30A23W
11 Schematic Diagrams
11 Schematic Diagrams
This Document can not be used without Samsung's authorization.
11-1 SVP Block Schematic Diagram
4 5
VCC3D_DPTV
OPTION C256 C257 C258 C259 C260 FT203
33pF 33pF 33pF 33pF 33pF LFB30-3A1E223M
ANYNET+DDC+TTX+SWITCH+30" SOUND VCC3D_DPTV
2
VCC3D_DPTV
B
C
FT204
1 A
3
1
3
A
VCC2.5D_DPTV
C
DG_DPTV
DG_DPTV
B
DG_DPTV MD(0:63)
A 1
2
DG_DPTV
FT200
3
C266 C267 C268 C269 C270 C271 C272
C
C236 C237 C238 C239 C240 FT202 C261 C262 C263 C264 C265
100nF 100nF 100nF 100nF 100nF 100nF 100nF
B
2
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