Samsung S27A350H, S24A350H, S23A350H, S22A350H, L3S27HS Service Manual
...
LCD-Monitor
Chassis : L3S22HS
L3S23HS
L3S24HS
L3S27HS
Model : S22A350H
S23A350H
S24A350H
S27A350H
Manual
SERVICE
TFT-LCD Monitor Contens
1. Precautions
2. Product specications
3. Disassembly and Reassemble
4. Troubleshooting
5. Wiring Diagram
S22A350H / S23A350H /
S24A350H / S27A350H
Contents
1. Precautions
1-1. Safety Precautions ......................................................................................................... 1-1
1-2. Servicing Precautions ..................................................................................................... 1-2
1-3. Static Electricity Precautions .......................................................................................... 1-2
1-4. Installation Precautions .................................................................................................. 1-3
2. Product specications
2-1. Feature & Specications ................................................................................................. 2-1
2-2. Spec Comparison to the Old Models .............................................................................. 2-3
2-3. Accessories .................................................................................................................... 2-4
2-4. Accessories (Sold separately) ........................................................................................ 2-5
3. Disassembly and Assembly
3-1. Disassembly ................................................................................................................... 3-1
4. Troubleshooting
4-1. Troubleshooting .............................................................................................................. 4-1
4-2. When the Power Does Not Turn On ............................................................................... 4-2
4-3. When the screen is blank (Analog) .................................................................................4-4
4-4. When a blank screen is displayed (HDMI) ..................................................................... 4-7
4-5. Error Examples and Actions ......................................................................................... 4-10
4-6. Adjustment .................................................................................................................... 4-11
5. Wiring Diagram
5-1. Wiring Diagram - Main Board ......................................................................................... 5-1
5-2. Board Connection - Main Board ..................................................................................... 5-2
5-3. Connector Functions ...................................................................................................... 5-3
5-4. Cables ............................................................................................................................ 5-3
This Service Manual is a property of Samsung Electronics Co.,Ltd.
Any unauthorized use of Manual can be punished under applicable
International and/or domestic law.
© 2010 Samsung Electronics Co.,Ltd.
All rights reserved.
Printed in Korea
3. Disassembly and Assembly
3. Disassembly and Assembly
This section describes the disassembly and reassembly sequences for this monitor.
Warning: As this monitor has parts that are sensitive to static electricity, be careful when handling them.
3-1. Disassembly
Caution: 1. Turn the monitor off before beginning the disassembly process.
2. When disassembling the monitor, do not use any metal tools except for the provided jig.
3. Disassemble the monitor carefully as directed in the following procedures.
Description Photo Screws
1. Removethestandbodyshowninthegure.
2. ① Turn the monitor over and insert your hands
into the top of the monitor at the center and
separate the front cover in the direction of the
arrowasshowninthegure.
② Separate the sides of the front cover up to the
directedlineasshowninthegure.
3. Remove the LVDS, LAMP wire, FUNCTION
cable, and then remove the SHIELD-COVER.
4. Remove the LCD panel.
3-1
3. Disassembly and Assembly
Description Photo Screws
5. Remove the main PCB from the SHIELDHOLDER.
6. We get the PBA.
※ Reassembly procedures are in the reverse order of disassembly procedures.
3-2
1. Precautions
1. Precautions
1-1. Safety Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1-1. Warnings
For continued safety, do not attempt to modify the circuit board.1.
Disconnect the AC power and DC power jack before servicing.2.
1-1-2. Servicing the LCD Monitor
When servicing the LCD Monitor, Disconnect the AC line cord from the AC outlet.1.
It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of 2.
this meter periodically.
1-1-3. Fire and Shock Hazard
Before returning the monitor to the user, perform the following safety checks:
Inspect each lead dress to make certain that the leads are not pinched or that hardware is not lodged between the 1.
chassis and other metal parts in the monitor.
Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and 2.
compartment covers or shields, isolation resistorcapacitor networks, mechanical insulators, etc.
Leakage Current Hot Check (Figure 1-1): 3.
WARNING : Do not use an isolation transformer during this test.
Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI
C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).
(READING SHOULD)
NOT BE ABOVE 0.5mA
DEVICE
UNDER
TEST
2-WIRE CORD
*ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
TEST ALL
EXPOSED METAL
SURFACES
LEAKAGE
CURRENT
TESTER
EARTH
GROUND
Figure 1-1. Leakage Current Test Circuit
With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch 4.
rst in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit,
etc.) and all exposed metal parts, including: metal cabinets, screwheads and control shafts.
The current measured should not exceed 0.5 milliamp.
Reverse the power-plug prongs in the AC outlet and repeat the test.
1-1-4. Product Safety Notices
Some electrical and mechanical parts have special safetyrelated characteristics which are often not evident from visual
inspection. The protection they give may not be obtained by replacing them with components rated for higher voltage,
wattage, etc. Parts that have special safety characteristics are identied 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, re and/or other hazards. Product safety is under review continuously and new instructions are issued whenever
appropriate.
1-1
1-2
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 conict between the following servicing precautions and any of the
safety precautions, always follow the safety precautions.
1-2-1 General Servicing Precautions
Always unplug the unit’s AC power cord from the AC power source and disconnect the DC Power Jack before 1.
attempting to:
(a) remove or reinstall any component or assembly, (b) disconnect PCB plugs or connectors, (c) connect a test
component in parallel with an electrolytic capacitor.
Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes 2.
used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such
elements to their original position.
After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that 3.
the area around the serviced part has not been damaged.
Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, 4.
input terminals and earphone jacks).
Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. 5.
Connect an insulation resistance meter (500 V) to theblades of the AC plug.
The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be
greater than 1 megohm.
Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; 6.
always remove the instrument’s ground lead last.
1-3. Static Electricity 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 eld-effect
transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your 1.
body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. To avoid a shock hazard,
be sure to remove the wrist strap before applying power to the monitor.
After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent 2.
accumulation of an electrostatic charge.
Do not use freon-propelled chemicals. These can generate electrical charges sufcient to damage ESDs.3.
Use only a grounded-tip soldering iron to solder or desolder ESDs.4.
Use only an anti-static solder removal device. Some solder removal devices not classied as “anti-static” can generate 5.
electrical charges sufcient to damage ESDs.
Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs 6.
are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive
materials.
Immediately before removing the protective material from the leads of a replacement ESD, touch the protective 7.
material to the chassis or circuit assembly into which the device will be installed.
Caution: Be sure no power is applied to the chassis or circuit and observe all other safety precautions.
Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, 8.
or lifting your foot from a carpeted oor can generate enough static electricity to damage an ESD.
1-3
1. Precautions
1-4. Installation Precautions
For safety reasons, more than two people are required for carrying the product.1.
Keep the power cord away from any heat emitting devices, as a melted covering may cause re or electric shock.2.
Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal 3.
temperature may cause re.
Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed 4.
to moisture. Otherwise, it may cause a re or electric shock.
Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product. Also check 5.
the antenna cable or the external connectors if they are fully unplugged. Damage to the cord may cause re or electric
shock.
Keep the antenna far away from any high-voltage cables and install it rmly. Contact with the highvoltage cable or the 6.
antenna falling over may cause re or electric shock.
When installing the product, leave enough space (10cm) between the product and the wall for ventilation purposes. 7.
A rise in temperature within the product may cause re.
1. Precautions
Memo
1-4
2. Product specications
2-1. Feature & Specications
Feature
Panel Speciications ሪ
S22A350H, S23A350H, S24A350H : 250 cd/m2 , 2 ms, CR 1000:1, 170/160 (CR>10)
S27A350H : 300 cd/m2, 2 ms, CR 1000:1, 170/160 (CR>10)
DPMS ሪ
S22A350H, S23A350H, S24A350H : Typical 0.3W / Max 0.4W
S27A350H : Typical 0.5W / Max 0.6W
Off-Timer function for reducing standby power usages ሪ
Windows Vista/Windows 7 authentication ሪ
HDMI with HDCP ሪ
Picture;a screen size desire ሪ
Supported Magic Bright3 / Eco Saving / Magic Angle / Image Size ሪ
Specications
Item Description
2. Product specications
Model S22A350H S23A350H
LCD Panel TFT-LCD panel, RGB vertical stripe, normally white transmissive
21.5” Wide viewable
0.24825(H) x 0.24825(V)mm Pixel Pitch
Scanning Frequency Horizontal : 30kHz ~ 81kHz (Automatic)
Vertical: 56Hz ~ 75Hz
Display Colors 16.7 Million colors
Maximum resolution
Input Signal Analog / HDMI with HDCP
Input Sync Signal Separate H/V sync, Composite H/V, Sync-on-Green
Maximum Pixel Clock rate 164Mhz
Active Display
(Horizontal/Vertical)
AC power voltage & Frequency AC 100V~240V,50Hz~60Hz
Power Consumption Typical 23W / Max 25W Typical 29W / Max 32W
Dimensions Set
(W X H X D)
476.64(H) x 268.11(V) 509.76(H) x 286.74(V)
523.9 X 327.7 X 59.0 mm
(Without Stand)
523.9 X 406.9 X 239.6 mm
(With Stand)
Horizontal: 1920 Pixels
Vertical: 1080 Pixels
Level:TTL level
0.2655(H) x 0.2655(V)mm Pixel Pitch
23” Wide viewable
555.7 X 346.6 X 59.2 mm
(Without Stand)
555.7 X 426.4 X 239.2 mm
(With Stand)
Weight Set
(After installation Stand)
Environmental Considerations Operating Temperature: 10˚C ~ 40˚C(50˚F ~ 104˚F)
Note: Designs and specications are subject to change without prior notice.
Set : 2.70kg
(Without Stand)
3.15kg (With Stand)
Operating Humidity : 10% ~ 80%
Storage Temperature: -25˚C ~ 45˚C(-13˚F ~ 113˚F)
Storage Humidity: 5% ~ 90%
Set : 2.65kg
(Without Stand)
3.10kg (With Stand)
2-1
2-2
2. Product specications
Specications
Item Description
Model S24A350H S27A350H
LCD Panel TFT-LCD panel, RGB vertical stripe, normally white transmissive
24” Wide viewable
0.27675(H)x0.27675(V)mm Pixel Pitch
Scanning Frequency Horizontal : 30kHz ~ 81kHz (Automatic)
Vertical: 56Hz ~ 75Hz
Display Colors 16.7 Million colors
Maximum resolution
Input Signal Analog / HDMI with HDCP
Input Sync Signal Separate H/V sync, Composite H/V, Sync-on-Green
Maximum Pixel Clock rate 164Mhz
Active Display
(Horizontal/Vertical)
AC power voltage & Frequency AC 100V~240V,50Hz~60Hz
Power Consumption Typical 27W / Max 30W Typical 29W / Max 32W
Dimensions Set
(W X H X D)
Weight Set
(After installation Stand)
531.36(H) x 298.891(V) 597.6(H) X 336.15(V)
578.6 X 359.1 X 59.2 mm
(Without Stand)
578.6 X 438.7 X 239.2 mm
(With Stand)
Set : 3.45kg
(Without Stand)
3.90kg (With Stand)
Horizontal: 1920 Pixels
Vertical: 1080 Pixels
Level:TTL level
0.31125(H) x 0.31125(V)mm Pixel Pitch
27” Wide viewable
654.0 X 405.6 X 60.3 mm
(Without Stand)
654.0 X 483.0 X 249.2 mm
(With Stand)
Set : 4.10kg
(Without Stand)
4.80kg (With Stand)
Environmental Considerations Operating Temperature: 10˚C ~ 40˚C(50˚F ~ 104˚F)
Operating Humidity : 10% ~ 80%
Storage Temperature: -25˚C ~ 45˚C(-13˚F ~ 113˚F)
Storage Humidity: 5% ~ 90%
Note: Designs and specications are subject to change without prior notice.
2-3
2. Product specications
2-2. Spec Comparison to the Old Models
SA350
Model
Design
Resolution 1920 X 1080 1920 X 1080
Input Analog / HDMI with HDCP Analog / HDMI with HDCP
Response Time 2ms(G to G) 2ms(G to G)
Viewing Angle 170/160(CR>10) 170/160(CR>10)
Brightness
(S22A350H / S23A350H /
S24A350H / S27A350H)
250 cd/m²
(S22A350H / S23A350H / S24A350H)
300 cd/m² (S27A350H)
(BX2250 / BX2350 / BX2450)
50series
250 cd/m²
Contrast MEGA:1(DCR) MEGA:1(DCR)
MagicBright 5 step 5 step
MagicAngle
Feature
Magic Angle
Image Size
Magic Bright3
Magic Tune
Eco Saving
Win7
Image Size
Magic Bright3
Picture Mode
Magic Tune
Magic ECO
Magic Return
Win7
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