Text preview for : samsung_lw32a23w_lcd_tv_sm_188.pdf part of Samsung samsung lw32a23w lcd tv sm 188 Samsung LCD TV LW32A23W LCD TV samsung_lw32a23w_lcd_tv_sm_188.pdf
Back to : samsung_lw32a23w_lcd_tv_s | Home
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
LW32A23W/LW40A23W
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
VCC5I
SC2_SVHS_CI AGND VCC5P
AGND Y_COMP1
VCC5P
CN510
SC2_CVBS_OUT AGND
VCC5P
ANGD PB_COMP1 VCC5P
SC2_SVHS_CO PR_COMP1 GND_PANEL
GND_PANEL
GND_PANEL
Y_COMP2 AGND PANEL_Y_DEC
AGND SC1_L_OUT PANEL_Y_INC
PB_COMP2 SC1_R_OUT SW_ACCE
CN509
PR_COMP2 AGND GND_PANEL
D4_1_CON1 SC2_L_IN TXOUT 3+
D4_1_CONT2(SC1_S) SC2_R_IN TXOUT 3-
D4_1_CONT3 AGND GND_PANEL
D4_2_CONT1 SC2_L_OUT TXCLKOUT+
D4_2_CONT2(SC2_S) SC2_R_OUT TXCLKOUT-
D4_2_CONT3 AGND GND_PANEL
AV_L COMP1_L TXOUT 2+
AV_R COMP1_R TXOUT 2-
GND AGND GND_PANEL
SC1_L_IN COMP2_L TXOUT 1+
SC1_R_IN COMP2_R TXOUT 1-
GND_PANEL
TXOUT 0+
TXOUT 0-
PC_L DDC_DVI_SDAS GND_PANEL
PC_R IDENT_PC SW_INVERTER
AGND RX0- ANA_DIMMING
CN507
COAXIAL_IN RX0+ PWM_DIMMING
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 LW32A23W/LW40A23W
1 Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1 Safety Precautions
1-1-1 Warnings
1. For continued safety, do not attempt to modify the
(READING SHOULD
circuit board. NOT BE ABOVE 0.5mA)
2. Disconnect the AC power and DC Power Jack
before servicing. DEVICE
LEAKAGE
CURRENT
UNDER TESTER
1-1-2 Servicing the LCD Monitor TEST
TEST ALL
EXPOSED METAL
1. When servicing the LCD Monitor disconnect the SURFACES
AC line cord from the AC outlet.
2-WIRE CORD
2. It is essential that service technicians have an
accurate voltage meter available at all times. Check
the calibration of this meter periodically. ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
1-1-3 Fire and Shock Hazard GROUND
Before returning the monitor to the user, perform the Figure 1-1. Leakage Current Test Circuit
following safety checks:
1. Inspect each lead dress to make certain that the 4. With the unit completely reassembled, plug the AC
leads are not pinched or that hardware is not line cord directly into a 120V AC outlet. With the
lodged between the chassis and other metal parts in unit's AC switch first in the ON position and then
the monitor. OFF, measure the current between a known earth
2. Inspect all protective devices such as nonmetallic ground (metal water pipe, conduit, etc.) and all
control knobs, insulating materials, cabinet backs, exposed metal parts, including: metal cabinets,
adjustment and compartment covers or shields, screwheads and control shafts. The current
isolation resistor-capacitor networks, mechanical measured should not exceed 0.5 milliamp. Reverse
insulators, etc. the power-plug prongs in the AC outlet and repeat
3. Leakage Current Hot Check (Figure 1-1): the test.
WARNING:
Do not use an isolation transformer during this test. 1-1-4 Product Safety Notices
Use a leakage current tester or a metering system
Some electrical and mechanical parts have special
that complies with American National Standards
safety-related characteristics which are often not
Institute (ANSI C101.1, Leakage Current for evident from visual inspection. The protection they give
Appliances), and Underwriters Laboratories (UL may not be obtained by replacing them with
Publication UL1410, 59.7). components rated for higher voltage, wattage, etc. Parts
that have special safety characteristics are identified by
! on schematics and parts lists. A substitute
replacement that does not have the same safety
characteristics as the recommended replacement part
might create shock, fire and/or other hazards. Product
safety is under review continuously and new
instructions are issued whenever appropriate.
LW32A23W/LW40A23W 1-1
1 Precautions
1-2 Servicing Precautions
WARNING: An electrolytic capacitor installed with the wrong polarity might explode.
Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions
section of this manual.
Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.
1-2-1 General Servicing Precautions
1. Always unplug the unit's AC power cord from the 4. Check the insulation between the blades of the AC
AC power source and disconnect the DC Power plug and accessible conductive parts (examples:
Jack before attempting to: metal panels, input terminals and earphone jacks).
(a) remove or reinstall any component or assembly, 5. Insulation Checking Procedure: Disconnect the
(b) disconnect PCB plugs or connectors, (c) connect power cord from the AC source and turn the power
a test component in parallel with an electrolytic switch ON. Connect an insulation resistance meter
capacitor. (500 V) to the blades of the AC plug.
2. Some components are raised above the printed The insulation resistance between each blade of the
circuit board for safety. An insulation tube or tape AC plug and accessible conductive parts (see
is sometimes used. The internal wiring is above) should be greater than 1 megohm.
sometimes clamped to prevent contact with
6. Always connect a test instrument's ground lead to
thermally hot components. Reinstall all such
the instrument chassis ground before connecting
elements to their original position.
the positive lead; always remove the instrument's
3. After servicing, always check that the screws, ground lead last.
components and wiring have been correctly
reinstalled. Make sure that the area around the
serviced part has not been damaged.
1-3 Electrostatically Sensitive Devices (ESD) Precautions
Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components are commonly
called Electrostatically Sensitive Devices (ESD). Examples of typical ESD are integrated circuits and some field-effect
transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor 6. Do not remove a replacement ESD from its
components or assemblies, drain the electrostatic protective package until you are ready to install it.
charge from your body by touching a known earth Most replacement ESDs are packaged with leads
ground. Alternatively, wear a discharging wrist- that are electrically shorted together by conductive
strap device. To avoid a shock hazard, be sure to foam, aluminum foil or other conductive materials.
remove the wrist strap before applying power to 7. Immediately before removing the protective
the monitor. material from the leads of a replacement ESD,
2. After removing an ESD-equipped assembly, place it touch the protective material to the chassis or
on a conductive surface such as aluminum foil to circuit assembly into which the device will be
prevent accumulation of an electrostatic charge. installed.
3. Do not use freon-propelled chemicals. These can Caution: Be sure no power is applied to the
generate electrical charges sufficient to damage chassis or circuit and observe all
ESDs. other safety precautions.
4. Use only a grounded-tip soldering iron to solder or
desolder ESDs. 8. Minimize body motions when handling
unpackaged replacement ESDs. Motions such as
5. Use only an anti-static solder removal device. Some brushing clothes together, or lifting your foot from
solder removal devices not classified as "anti-static" a carpeted floor can generate enough static
can generate electrical charges sufficient to damage electricity to damage an ESD.
ESDs.
1-2 LW32A23W/LW40A23W
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
LW32A23W/LW40A23W 4-1
4 Alignments and Adjustments
4-2 LW32A23W/LW40A23W
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
LW32A23W/LW40A23W 4-3
4 Alignments and Adjustments
4-2-3 32" Fatory Mode
Interlocking RF Interlocking RF
* The color default value on the menu screen of DVI, DTV mode is changed from 55 to 80
(It is including OSD).
4-4 LW32A23W/LW40A23W
4 Alignments and Adjustments
4-2-4 40" Fatory Mode
* The color default value on the menu screen of DVI, DTV mode is changed from 55 to 80
(It is including OSD).
LW32A23W/LW40A23W 4-5
4 Alignments and Adjustments
Table 4-2 Default Value
4-6 LW32A23W/LW40A23W
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.
LW32A23W/LW40A23W 4-7
4 Alignments and Adjustments
Memo
4-8 LW32A23W/LW40A23W
11 Schematic Diagrams
This Document can not be used without Samsung's authorization.
11-1 DPTV, VPC3230, MST 9883 Block Schematic Diagram
VCC3D_DPTV
OPTION C256 C257 C258 C259 C260
FT203
33pF 33pF 33pF 33pF 33pF
LFB30-3A1E223M VCC3D_DPTV
2
VCC3D_DPTV
B
C
3
FT204
1 A
1
A
VCC2.5D_DPTV
3
C
DG_DPTV
DG_DPTV
1
MD(0:63)
B