Samsung CS21A550MLK, CS-21Z45MJ, CL21B501HLMXZS Service Manual
COLOR TELEVISION
Chassis : KSBH(P)_CB1J
Model : CS21A550MLKXXV
SERVICE
Manual
COLOR TELEVISION CONTENTS
1. Precaution
2. Product Specification
3. Disassembly & Reassembly
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
7. Schematic Diagram
CS21A550MLK
Refer to the service manual in the GSPN (see the rear cover) for the more information.
GSPN (Global Service Partner Network)
Area Web Site
North America service.samsungportal.com
Latin America latin.samsungportal.com
CIS cis.samsungportal.com
Europe europe.samsungportal.com
China china.samsungportal.com
Asia asia.samsungportal.com
Mideast & Africa mea.samsungportal.com
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.
© Samsung Electronics Co.,Ltd. Jan. 2009
Printed in Korea
AA82-00000A
Table of Contents
1. Precaution
1-1 Safety Precautions ......................................................................................................................................................1-1
1-2 Servicing Precautions ..................................................................................................................................................
1-3 Static Electricity Precautions .......................................................................................................................................
1-4 Installation Precautions ...............................................................................................................................................
2. Product Specification
2-1 Product Specification ...................................................................................................................................................2-1
2-2 Specifications Analysis ................................................................................................................................................
2-3 Accessories .................................................................................................................................................................
3. Disassembly & Reassembly
3-1 Overall Disassembly & Reassembly ............................................................................................................................3-1
4. Troubleshooting
4-1 Troubleshooting ...........................................................................................................................................................4-1
4-2 Adjustment ...................................................................................................................................................................
1-3
1-4
1-5
2-2
2-3
4-14
5. Exploded View & Part List
5-1 CS21A550MLKXXV Exploded View ............................................................................................................................5-1
5-2 CS21A550MLKXXV Electrical Part List .......................................................................................................................
6. Wiring Diagram
6-1 Overall Wiring ..............................................................................................................................................................6-1
6-2 Pin Connection ............................................................................................................................................................
7. Schematic Diagram
7-1 Circuit Description .......................................................................................................................................................7-1
7-2 Schematic Diagram .....................................................................................................................................................
5-3
6-3
7-5
Precaution
1. Precaution
To avoid possible damages or electric shocks or exposure to radiation, follow the instructions below with regard to safety,
installation, service and ESD.
1-1 Safety Precautions
1. Make sure all protective devices are properly installed including non-metallic handles and compartment covers when installing or
re-installing the chassis or chassis assemblies.
2. Make sure that no gaps exist between the cabinets for children to insert their fingers in to prevent children from receiving electric
shocks. Gaps mentioned above include ventilation holes of a too great magnitude between the vaccum tube and the cabinet
mask, and the improper installation of the rear cabinet.
㏁
Errors may occur when the resistance is below 1.0
In these cases, make sure that the device is repaired before sending it back to the customer.
or over 5.2 ㏁.
3. Check for Electricity Leakage (Figure 1-1)
Warning: Do not use an insulated transformer for checking the
leakage. Use only those current leakage testers or mirroring
systems that comply with ANSIC 101.1 and the Underwriter
Laboratory’s specifications (UL1410, 59.7).
DEVICE
UNDER
TEST
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED)
LEAKAGE
CURRENT
TESTER
(READING SHOULD
NOT BE ABOVE
0.5mA)
EARTH
GROUND
4. A high voltage is maintained within the specified limits using safety parts, calibration and tolerances. When voltage exceeds the
specified limits, check each special part.
5. Warning for Engineering Changes:
Never make any changes or additions to the circuit design or the internal part for this product.
Ex: Do not add any audio or video accessory connectors. This might cause physical damage. Furthermore, any changes or
additions to the original design/engineering will invalidate the warranty.
6. Warning - Hot Chassis:
Some TV chassis are directly connected to one end of the AC power cord for electrical reasons.
Without insulated transformers, the product can only be repaired safely when the chassis is connected to the earthed end of the
AC power source.
To make sure the AC power cord is properly connected, follow the instructions below. Use the voltmeter to measure the voltage
between the chassis and the earthed ground. If the measurement is over 1.0V, unplug the AC power cord and change the
polarity before re-inserting it. Measure the voltage between the chassis and the ground again.
7. Some TV chassis are shipped with an additional secondary grounding system. The secondary system is adjacent to the AC
power line. These two grounding systems are separated in the circuit using an unbreakable/unchangeable insulation material.
8. When any parts, material or wiring appear overheated or damaged, replace them with new regular ones immediately.
When any damage or overheating is detected, correct this immediately and make a regular check of possible errors.
Samsung Electronics 1-1
Precaution
9. Check for the original shape of the lead, especially that of the antenna wiring, any sharp edges, the AC power and the high
voltage power. Carefully check if the wiring is too tight, incorrectly placed or loose. Never change the space between the part and
the printed circuit board. Check the AC power cord for possible damages. Keep the part or the lead away from any heat-emitting
materials.
10. Safety Indication:
Some electrical circuits or device related materials require special attention to their safety features, which cannot be viewed by
the naked eye. If an original part is replaced with another irregular one, the safety or protective features will be lost even if the
new one has a higher voltage or more watts.
Critical safety parts should be bracketed with (
, ). Use only regular parts for replacements (in particular, flame resistance
and dielectric strength specifications). Irregular parts or materials may cause electric shock or fire.
When separate the cable connecting the FBT and CRT,using the JIG discharge the electricity inside the CRT.
picture is as below:
1-2 Samsung Electronics
1-2 Servicing Precautions
Warning 1: First carefully read the “Safety Instruction” in this service manual.
When there is a conflict between the service and the safety instructions, follow the safety instruction at all times.
Warning 2: Any electrolytic capacitor with the wrong polarity will explode.
1. The service instructions are printed on the cabinet, and should be followed by any service personnel.
Precaution
2. Make sure to unplug the AC power cord from the power source before starting any repairs.
(a) Remove or re-install parts or assemblies.
(b) Disconnect the electric plug or connector, if any.
(c) Connect the test part in parallel with the electrolytic capacitor.
3. Some parts are placed at a higher position than the printed board. Insulated tubes or tapes are used for this purpose.
The internal wiring is clamped using buckles to avoid contact with heat emitting parts. These parts are installed back to their
original position.
4. After the repair, make sure to check if the screws, parts or cables are properly installed. Make sure no damage is caused to the
repaired part and its surroundings.
5. Check for insulation between the blade of the AC plug and that of any conductive materials (i.e. the metal panel, input terminal,
earphone jack, etc).
6. Insulation Check Process: Unplug the power cord from the AC source and turn the switch on. Connect the insulating resistance
meter (500v) to the AC plug blade.
The insulating resistance between the blade of the AC plug and that of the conductive material should be more than 1
7. Any B+ interlock should not be damaged.
If the metal heat sink is not properly installed, no connection to the AC power should be made.
8. Make sure the grounding lead of the tester is connected to the chassis ground before connecting to the positive lead.
The ground lead of the tester should be removed last.
㏁
.
9. Beware of risks of any current leakage coming into contact with the high-capacity capacitor.
10. The sharp edges of the metal material may cause physical damage, so protect yourself by wearing gloves during the repair.
Samsung Electronics 1-3
Precaution
1-3 Static Electricity Precautions
1. Some semi-conductive (“solid state”) devices are vulnerable to static electricity. These devices are known as ESD. ESD
includes the integrated circuit and the field effect transistor. To avoid any materials damage from electrostatic shock, follow the
instructions described below.
2. Remove any static electricity from your body by connecting the earth ground before handling any semi-conductive parts or
assemblies. Alternatively, wear a dischargeable wrist-belt.
(Make sure to remove any static electricity before connecting the power source - this is a safety instruction for avoiding electric
shock)
3. Remove the ESD assembly and place it on a conductive surface such as aluminum foil to prevent accumulating static electricity.
4. Do not use any Freon-based chemicals. Such chemicals will generate static electricity that causes damage to the ESD.
5. Use only grounded-tip irons for soldering purposes.
6. Use only anti-static solder removal devices.
Most solder removal devices do not support an anti-static feature. A solder removal device without an anti-static feature can store
enough static electricity to cause damage to the ESD.
7. Do not remove the ESD from the protective box until the replacement is ready. Most ESD replacements are covered with lead,
which will cause a short to the entire unit due to the conductive foam, aluminum foil or other conductive materials.
8. Remove the protective material from the ESD replacement lead immediately after connecting it to the chassis or circuit
assembly.
9. Take extreme caution in handling any uncovered ESD replacements. Actions such as brushing clothes or lifting your leg from the
carpet floor can generate enough static electricity to damage the ESD.
CAUTION
These servicing instructions are for use by qualified
service personnel only.
To reduce the risk of electric shock do not perform any
servicing other than that contained in the operating
instructions unless you are qualified to do so.
1-4 Samsung Electronics
Precaution
1-4 Installation Precautions
1. For safety reasons, more than two people are required for carrying the product.
2. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock.
3. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may
cause fire.
4. Bend the external antenna cable when connecting it to the product. This is a measure to protect it from being exposed to
moisture. Otherwise, it may cause a fire or electric shock.
5. Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product. Also check the
antenna cable or the external connectors if they are fully unplugged. Damage to the cord may cause fire or electric shock.
6. Keep the antenna far away from any high-voltage cables and install it firmly. Contact with the high-voltage cable or the antenna
falling over may cause fire or electric shock.
7. Check the basics of the screen test.
- Image position/size, Tilt adjustment, Actuator activation .
Samsung Electronics 1-5
MEMO
1-6 Samsung Electronics
2. Product Specification
2-1 Product Specification
Features
Block Specification Major IC Remark
CRT 21” Slim CRT 21” Ultra Slim CRT AA03-00580A
RF Part 1 TUNER F/S TUNER EWT-5F6T2-EW
Product Specification
Power
Video
Sound Output : 5Wx2 LA42032
Cabinet 21AM0 Cabinet AM0 Cabinet
Model CS21A550MLK
Screen Size 21”
Dimensions (WxHxD) 610 x 504 x 371 mm
Weight 19.5 kg
Voltage
Speaker Output 5W + 5W
Input Voltage : SEA:220~240V
MID-ASIR:100~240V
MULTI SYSTEM(NT/PAL/SECAM)
1H Comb Filter
Specification
SEA: 220~240V
MID-ASIR: 100~240V
W6753F
UOC TOP
Samsung Electronics 2-1
Product Specification
2-2 Specifications Analysis
Model CS21A550MLK (KSBH) CS-21Z45MJ (KSCA)
Design
Product Type Ultra Slim Marathon CRT Ultra Slim Fit CRT
Digital TV Analog Analog
Basic
Visual
Quality
Audio
Function
Ports
※
For the power supply and power consumption, refer to the label attached to the product.
Digital Display 576i/480i 576i/480i
Screen Size 21 21
Aspect Ratio 4:3 4:3
Progressive Scan O O
Digital Comb Filter O O
Screen Pitch 0.73 0.73
Digital Noise Reduction O O
AKB O O
DNle Jr O O
3:2 Pull Down Support X X
Base/Treble/Balance X X
Equalizer X X
AVL X X
Surround X X
Speaker System Direct Direct
Sperker Output 5W + 5W 5W + 5W
Dual Screen Function X X
Double Screen X X
TTX X X
Still Picture X X
Auto Jack Recognition X X
EPG X X
Network X X
FM Radio O X
Antenna In Rear:1 Rear:1
Extermal In Rear: 2 Rear: 1
S-Video X X
Y/Pb/Pr O X
PC X X
DVI X X
HDMI X X
Digital Audio Out X X
Video Out Rear.1 Rear:1
Remote Controller TM930 TM930
※
: application, : non-application
2-2 Samsung Electronics
2-3 Accessories
2-3-1 Supplied Accessories
Accessories Item Item code Remark
Product Specification
Remote Control
Batteries
Power Cord AA39-10006X
Owner’s Instructions AA68-03999B
Warranty Card
Registration Card
Safety Guide Manual
2-3-2 Accessories that can be purchased additionally
Accessories Item Item code Remark
RF Cable -
BN59-00891A
4301-000121
Samsung Service center
AA68-03753A
AA68-03754A
AA68-03242M
Video Cable -
Audio Cable -
Component Cables (RCA) -
Electronics Store/
Internal shopping mall
Samsung Electronics 2-3
MEMO
2-4 Samsung Electronics
3. Disassembly & Reassembly
3-1 Overall Disassembly & Reassembly
3-1-1 Disassembling the Cabinet
Part Name Description Description Photo
①
Back
Cover
Remove the 9 screws fixing the Back Cover &
Terminal Board.
: RH,+,-,2S,M3,L6,ZPC(WHT), SWRCH18A,-
②
Tap the Back Cover 2 or 3 times and pull the cover
and remove it.
Since there is a danger of injury from the remaining
current and of damaging the product due to static
electricity, make sure to remove the power cord and
wait for a moment so that the remaining current is
discharged completely before disassembling the
product.
Disassembly & Reassembly
Samsung Electronics 3-1
Disassembly & Reassembly
Pull the chassis while pushing the
clip fixing the Front Cabinet and
the Holder Chassis.
Pull the chassis while pushing the
clip fixing the Front Cabinet and
the Holder Chassis.
3-1-2 Disassembling the CRT and Chassis
Part Name Description Description Photo
①
Chassis
Holder
Separate the Ass’y Holder chassis from the Front
Cabinet.
②
Pull the Holder Chassis while pushing the catch up.
If you pull it with excessive power, it may cause
damage to the catch or connector. Therefore, pull it
until the catch is out of the hole.
①
Separate the CRT connection, the TBC wire,and the
the speaker connection.
Since there is a hinge fixing the Wire Connector and
Connector Header, if the wire is pulled with excessive
power, it may damage the catch or connector.
Therefore, pull it only after pressing the hinge down
completely.
①
Separate the D-Coil, DY-Cable and power cord from
the Front Cabinet and Main Board.
②
Separate the power cord, DY-Cable by pushing the
fixing catch to the side and pulling the wire up.
①
Separate the CRT Ass’y from the CRT.
②
Separate the TBC wire, GND cables from the
CRT Ass’y sequentially.
3-2 Samsung Electronics
Disassembly & Reassembly
Pull the wires while
pressing on the fixing clip.
Part Name Description Description Photo
①
Chassis
Holder
Separate the cable connecting the FBT and CRT
from the CRT.
Since a high voltage current resides inside the CRT,
do not to touch the CRT hole with metal or your body
when separating the cable.
3-1-3 Disassembling the CRT Ass’y
Part Name Description Description Photo
①
CRT
Ass’y
Separate the cables connecting the Main Ass’y and the
CRT Ass’y.
①
Separate the wires from the FBT of the Main Board and
the CRT Ass’y.
②
To separate thick wire, pull the wires while pressing the
push-type clip at the connector.
Take care when separating the wires because pulling
the wires by force may damage the socket. In addition,
separate
the wires on a flat and clean surface so as to prevent
scratching of the material and the PCB.
Samsung Electronics 3-3
MEMO
3-4 Samsung Electronics
4. Troubleshooting
4-1 Troubleshooting
4-1-1 First Checklist for Troubleshooting
1. Power LED: Check that the LED works when the power cord is connected to a 90-264 wall outlet.
2. LED Indicators: See table 4-1-2 Basic Troubleshooting: LED Diagnosis on the Front Panel.
Troubleshooting
3. In case of a power failure or abnormal screen, check the following items.
①
Check that the power cord is correctly connected to a 90-264 wall outlet.
②
Check that the Master Switch has been pressed.
③
Ch eck that the transmitter is turned on.
④
Check that transmitter device selection is set to TV.
⑤
Check that the signal cable is properly connected.
⑥
Check that channel setting has been set.
Samsung Electronics 4-1
Troubleshooting
4-1-2 Checkpoints by Error Mode
1. Troubleshooting Summary
Problem Solution
The power does not turn on. Check if the power cord is properly connected.
Air broadcasting does not work. Check if the antenna is properly installed.
Cable broadcasting does not work. Subscribe to a local cable broadcasting firm and get support.
Satellite broadcasting does not work.
2. Menu & Remote Control
Problem Solution
The remote control does not work.
Cannot change the channel with the remote control.
Cannot select an A/V channel.
Cannot select a menu.
Install a satellite antenna (Parabola) and connect it to the TV.
■ PresstheSelectDevicebuttontoselecttheTVorexternaldevice.
■ Replacethebatteryoftheremotecontrolwithanewone.
■ Insertthebatterymakingsurethepolarity(+,-)iscorrect.
■ Checkiftheangleorthedistanceissufficient,orifthereisany
interference between the product and the remote control.
■ Makesuretheuserhaspressedthecorrectbutton.
■ ToavoiddirectsunlighttothereceivingpaneloftheTV,removeany
indoor lighting or change the location of the TV.
■ CheckifthepowerswitchatthebackleftoftheTVisturnedon..
■ PresstheSelectDevicebuttontoselecttheTV.
■ Changethechannelusingtheremotecontrolofthecableorsatellite
receiver.
Press the source button and check if the AV item is grayed out. When the
AV item is grayed out, you cannot select an A/V channel. Check if the
connector is properly connected.
Check if the menu is grayed out. If a menu is grayed out, it cannot be
selected.
4-2 Samsung Electronics
3. Screen
Problem Solution
■ Checkifthepowercordisproperlyconnected.
The screen is black and there is no sound.
Only the screen is blank/it is dark or too bright. Adjust the screen brightness.
■ Turnonthepower.
■ SelectanAVchannelthatcorrespondstotheexternaldevice.
Troubleshooting
The screen is blue/the external channel is not
displayed.
The screen overlaps (double/triple).
The screen is snowy or unclear. The picture quality
gets worse when it is windy
Dotted or semi-dotted lines are displayed on the
screen.
The screen is black and white.
The colors of the screen are odd/strange.
Unusual lines appear on the screen.
Unusual lines appear on the screen when watching
or recording to video.
4. Sound
Problem Solution
There is no sound.
■ Checkiftheconnectorisproperlyinstalled.
■ SelectanAVchannelthatcorrespondstotheexternaldevice.
■ Checkiftheantennaisproperlyinstalled.
■ Adjusttheposition,angleordirectionoftheantenna.
■ Checkiftheantennahasbeenbentormovedbythewind.
■ Checktheantennaforitslifetime.
(Normally 3 - 5 years, 1-2 years near the coast)
Install the antenna as far away from the road as possible.
■ Adjustthecolordensity.
■ Checkiftheconnectorisproperlyinstalled.
Adjust the color tones.
Keep the antenna away from the power cord or connectors if possible.
Keep the video player as far away from the TV as possible.
■ Increasethevolume.
■ PresstheMutebutton.
The sound is very low.
■ Increasethevolume.
■ SettheautovolumecontroltoON.
There is a lot of noise. Keep the antenna away from the power cord or connectors if possible.
The selected language does not appear. Press the Multiplex button to select the TV.
Samsung Electronics 4-3
Troubleshooting
5. Channel
Problem Solution
■ Checkiftheantennaisproperlyinstalled.
There are no channels available.
■ PresstheAutoChannelbuttontostorechannels.
■ Contactyourlocalbroadcastingservicestation.
■ Adjusttheposition,angleordirectionoftheantenna.
■ ActivatetheReceptionSensitivityBoostfeature.
Some channels are not available.
■ Contactyourlocalbroadcastingservicestation.
■ UsethenumberkeystoselectaspecificchannelandpressStore/Clear
to memorize it.
Only the UHF (14-69) channels are not available. Check if the antenna is able to receive UHF signals.
6. Others
Problem Solution
The TV makes a noise as if something is dropping
inside.
This noise may occur when the plastic material inside the TV expands or
contracts according to the seasonal temperature or humidity. This is like the
noise from a furniture/cabinet/sink unit, and there is no need for concern.
4-4 Samsung Electronics
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