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 TV
When servicing the LCD TV, 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. 2.
Check the calibration of this meter periodically.
1-1-3. Fire and Shock Hazard
Before returning the LCD TV 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 LCD TV.
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.
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 LCD TV.
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 a 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 (0.4m) between the product and the wall for ventilation purposes. 7.
A rise in temperature within the product may cause re.
Anynet+: Anynet+ is an AV network system that enables you to control all connected Samsung AV devices ሪ
with the TV’s remote.
To directly connect to TV
Connect the [HDMI 1], [HDMI 2] or [HDMI ] jack on the TV and the HDMI OUT jack of the corresponding
Anynet+ device using an HDMI cable.
To connect to Home Theater
Connect the [HDMI 1], [HDMI 2] or [HDMI ] jack on the TV and the HDMI OUT jack of the corresponding Anynet+ 1.
device using an HDMI cable.
Connect the HDMI IN jack of the home theater and the HDMI OUT jack of the corresponding Anynet+ 2.
device using the HDMI cable.
- Connect the Optical cable between [Digital Audio Out (Optical)] on your TV and Digital Audio Input on the
Home Theater.
- When following the connection above, the Optical jack only outputs 2 channel audio. You will only hear sound from
the Home Theater’s Front Left and Right speakers and the subwoofer. If you want to hear 5.1 channel audi
connect the DIGITAL AUDIO OUT (OPTICAL) jack on the DVD / Satellite Box (ie Anynet Device 1 or 2) directly
to the Ampli er or Home Theater, not the TV.
- Connect only one Home Theater.
- You can connect an Anynet+ device using the HDMI 1.3 cable. Some HDMI cables may not support Anynet+
functions.
- Anynet+ works when the AV device supporting Anynet+ is in the Standby or On status.
- Anynet+ supports up to 12 AV devices in total. Note that you can connect up to 3 devices of the same type.
2-17
2. Product specications
2-4. Accessories
ProductDescriptionModelCode. NoRemark
Remote Control & Batteries
(AAA x 2)
Power CordALL3903-000456
Cover-Bottom530/550/570
Stand
530/550/570
450
550/570
530
450
BN59-01014A
4301-000121
BN59-01012A
4301-000121
32” : BN63-06389A
37”/40”/46” : BN63-06339A
32" : BN90-02442B
37"/40" : BN90-02443B
46" : BN90-02444B
32" : BN90-02464B
37"/40" : BN90-02466B
46" : BN90-02467B
26" : BN90-02526B
32" : BN90-02527B
Samsung Electronics
Service center
Screw
(for the stand - M4, L6)
Owner’s Instructions
Cleaning ClothALLBN63-01798B
Warranty Card / Registration
Card / Safety Guide Manual
(Not available in all locations)
530/550/5706003-001003
530
550BN68-02688A
570BN68-02791D
450BN68-02592A
ALL
BN68-02542A
BN68-00514E
BN68-02839D
AA68-03242T
3. Disassembly and Reassembly
3. Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the LE37C53*** LCD TV.
WARNING: This LCD TV contains electrostatically sensitive devices. Use caution when handling these components.
3-1. Disassembly and Reassembly
Cautions: 1. Disconnect the LCD TV from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.
3. If Rear-cover is made of metal, be careful not to scratch.
DescriptionPicture DescriptionScrews
1. Place the TV face down on cushioned table.
Remove 4 screws from the stand.
N 450 26" : Remove 3 screws from
the bottom of stand.
Remove stand.
450 26" only
6003-001003
6002-001294
(450 26" only)
3-1
3-2
3. Disassembly and Reassembly
DescriptionPicture DescriptionScrews
2. Remove the screws of rear-cover.
► C5XX
32" : Remove the 9 screws of rear-cover.
37" : Remove the 13 screws of rear-cover.
40" : Remove the 11 screws of rear-cover.
46" : Remove the 14 screws of rear-cover.
► C45X
26" : Remove the 6 screws of rear-cover.
32" : Remove the 8 screws of rear-cover.
3. Lift up the rear-cover.
6003-001003
6002-001294
(450 26" only)
4. Remove the left and right speaker.
5. Remove the 5 screws of main board.
Remove the screws of SMPS board.
► C5XX
32", 37" : Remove the 5 screws of rear-cover.
40", 46" : Remove the 7 screws of rear-cover.
► C5XX
26", 32" : Remove the 5 screws of rear-cover.
6. Remove the 5 screws of bracket stand link.
Remove the screws of panel and front.
► C5XX
32" : Remove the 4 screws of rear-cover.
37" : Remove the 2 screws of rear-cover.
40"/46" : Remove the 3 screws of rear-cover.
► C5XX
26" : Remove the 2 screws of rear-cover.
32" : Remove the 4 screws of rear-cover.
6001-002284
6003-001439
6003-000337
6003-001003
3-3
3. Disassembly and Reassembly
DescriptionPicture DescriptionScrews
7. Lift up the stand link.
8. Lift up the panel.
Reassembly procedures are in the reverse order of disassembly procedures. ※
Screw Size
Code No.A (mm)B (mm)C (mm)Q’ty
6001-0022848.3±0.58.0±0.63.83~3.98-
6002-0012948.3±0.516.0±0.83.85~4.0-
6003-0003377.3~8.39.2~10.03.73~3.83-
6003-0010037.80~8.3011.20~12.003.81~3.91-
6001-0026048.3±0.510.0±0.53.83~3.98-
4. Troubleshooting
4-1. Troubleshooting
4-1-1. Previous check
Check the various cable connections rst. 1.
• Check to see if there is a burnt or damaged cable.
• Check to see if there is a disconnected or loose cable connection.
• Check to see if the cables are connected according to the connection diagram.
Check the power input to the Main Board.2.
4. Troubleshooting
4-1
4-2
4. Troubleshooting
4-1-2. No Power
Symptom
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Major
checkpoints
The LEDs on the front panel do not work when connecting the power cord. The SMPS relay does not work when connecting the power cord. The units appears to be dead. -
Check the internal cable connection status inside the unit. Check the fuses of each part. Check the output voltage of SMPS. Replace the Main Board. -
Diagnostics
Lamp(Backlight) Off,
power indicator LED off?
Yes
Lamp(Backlight) Off,
power indicator LED on?
Yes
Does proper Stand-By DC A5V
appear at TP - A5V1?
Yes
Does proper Main DC B13V, B5V
appear at TP - B13V1, B5V2?
Yes
Does proper DC A3.3V appear at
TP - A3.3V1?
Yes
Does proper B3.3V, B1.8V, SPI_3.3V
appear at TP - B3.3V1, B1.8V1, SPI_A3.3 ?
No
No
No
No
No
No
Change the 18p power cable.
Change INVERTER/BALANCE B’D.
Change the Main Assy.
Yes
Does proper DC B13V appear at
LVDS connector Pin #1~5 of T-con b’d?
Yes
Does proper DC B13V appear at
F1 of T-con b’d?
Yes
A power is supplied to set?
CautionMake sure to disconnect the power before working on the IP board.
No
No
Change the LVDS cable.
Change the T-con b’d.
Check a other function.(No picture part)
Replace a LCD Panel.
4-3
4. Troubleshooting
4-4
4. Troubleshooting
4-1-3. No Video (Analog PC signal)
SymptomAudio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the PC source -
Check the Arsenal, Check the Chelsea. This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the PC source and
check the connection of D-SUB ?
No
No
Check a set in the ‘Stand-by mode’
or ‘DPMS mode’.
Input the analog PC signal properly.
Diagnostics
Yes
Does the signal appear at
TP - PC_R, PC_G, PC_B, PC_HS, PC_VS
1
(R, G, B, H, V) ?
Yes
Does the digital data appear at
2
TP-E_TXCLK+, E_TXCLK-,
O_TXCLK+, O_TXCLK-?
Yes
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
No
No
Check CN902, PC cable.
Change the Main Assy.
Check IC1102 (SX1).
Change the Main Assy.
Please, Contact Tech support.
CautionMake sure to disconnect the power before working on the IP board.
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