Samsung CL21B501HLMXZS User manual

SERVICE
Manual
COLOR TELEVISION
Chassis: KSCB(N)_CB5H
Model : CL21B501HLMXZS
COLOR TELEVISION CONTENTS
1. Precaution
2. Product Specification
3. Disassembly & Reassembly
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
7. Schematic Diagram
Refer to the service manual in the GSPN (see the rear cover) for the more information.
CL21B501HL

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.
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
© Samsung Electronics Co.,Ltd. Jun. 2009
Printed in Korea
AA82-05984A

Table of Contents
1. Precaution
1-1 Safety Precautions ......................................................................................................................................................1-1
1-2 Servicing Precautions..................................................................................................................................................1-3
1-3 Static Electricity Precautions .......................................................................................................................................1-4
1-4 Installation Precautions ...............................................................................................................................................1-5
2. Product Specification
2-1 Product Specification...................................................................................................................................................2-1
2-2 Specifications Analysis ................................................................................................................................................2-2
2-3 Accessories .................................................................................................................................................................2-3
3. Disassembly & Reassembly
3-1 Overall Disassembly & Reassembly............................................................................................................................3-1
4. Troubleshooting
4-1 Troubleshooting ...........................................................................................................................................................4-1
4-2 Adjustment...................................................................................................................................................................4-14
5. Exploded View & Part List
5-1 CL21B501HLMXZS Exploded View ............................................................................................................................5-1
5-2 CL21B501HLMXZS Electrical Part List .......................................................................................................................5-3
6. Wiring Diagram
6-1 Overall Wiring ..............................................................................................................................................................6-1
6-2 Pin Connection ............................................................................................................................................................6-2
7. Schematic Diagram
7-1 Circuit Description .......................................................................................................................................................7-1
7-2 Schematic Diagram .....................................................................................................................................................7-5

Disassembly & Reassembly
Samsung Electronics 3-1
3. Disassembly & Reassembly
3-1 Overall Disassembly & Reassembly
3-1-1 Disassembling the Cabinet
Part Name Description Description Photo
Back
Cover
① Remove the 7 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
3-2 Samsung Electronics
3-1-2 Disassembling the CRT and Chassis
Part Name Description Description Photo
Chassis
Holder
① 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.
Pull the chassis while pushing the
clip fixing the Front Cabinet and
the Holder Chassis.
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.
Pull the chassis while pushing the
clip fixing the Front Cabinet and
the Holder Chassis.
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.
Pull the chassis while pushing the
clip fixing the Front Cabinet and
the Holder Chassis.
① Separate the CRT Ass’y from the CRT.
② Separate the TBC wire, GND cables from the CRT
Ass’y sequentially.
Pull the chassis while pushing the
clip fixing the Front Cabinet and
the Holder Chassis.

Disassembly & Reassembly
Samsung Electronics 3-3
Part Name Description Description Photo
Chassis
Holder
① 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
CRT
Ass’y
① Separate the cables connecting the Main Ass’y and the
CRT Ass’y.
Pull the wires while
pressing on the fixing clip.
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.
Pull the wires while
pressing on the fixing clip.

MEMO
3-4 Samsung Electronics

Troubleshooting
Samsung Electronics 4-1
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.
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.

Troubleshooting
4-2 Samsung Electronics
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 Install a satellite antenna (Parabola) and connect it to the TV.
2. Menu & Remote Control
Problem Solution
The remote control does not work.
■ PresstheSelectDevicebuttontoselecttheTVorexternaldevice.
■ Replacethebatteryoftheremotecontrolwithanewone.
■ Insertthebatterymakingsurethepolarity(+,-)iscorrect.
■ Checkiftheangleorthedistanceissufficient,orifthereisany
interference between the product and the remote control.
■ Makesuretheuserhaspressedthecorrectbutton.
■ ToavoiddirectsunlighttothereceivingpaneloftheTV,removeany
indoor lighting or change the location of the TV.
■ CheckifthepowerswitchatthebackleftoftheTVisturnedon..
Cannot change the channel with the remote control.
■ PresstheSelectDevicebuttontoselecttheTV.
■ Changethechannelusingtheremotecontrolofthecableorsatellite
receiver.
Cannot select an A/V channel.
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.
Cannot select a menu. Check if the menu is grayed out. If a menu is grayed out, it cannot be
selected.

Troubleshooting
Samsung Electronics 4-3
3. Screen
Problem Solution
The screen is black and there is no sound.
■ Checkifthepowercordisproperlyconnected.
■ Turnonthepower.
■ SelectanAVchannelthatcorrespondstotheexternaldevice.
Only the screen is blank/it is dark or too bright. Adjust the screen brightness.
Thescreenisblue/theexternalchannelisnot
displayed.
■ Checkiftheconnectorisproperlyinstalled.
■ SelectanAVchannelthatcorrespondstotheexternaldevice.
The screen overlaps (double/triple). ■ Checkiftheantennaisproperlyinstalled.
■ Adjusttheposition,angleordirectionoftheantenna.
The screen is snowy or unclear. The picture quality
gets worse when it is windy
■ Checkiftheantennahasbeenbentormovedbythewind.
■ Checktheantennaforitslifetime.
(Normally 3 - 5 years, 1-2 years near the coast)
Dotted or semi-dotted lines are displayed on the
screen.
Install the antenna as far away from the road as possible.
The screen is black and white. ■ Adjustthecolordensity.
■ Checkiftheconnectorisproperlyinstalled.
The colors of the screen are odd/strange. Adjust the color tones.
Unusual lines appear on the screen. Keep the antenna away from the power cord or connectors if possible.
Unusual lines appear on the screen when watching
or recording to video.
Keep the video player as far away from the TV as possible.
4. Sound
Problem Solution
There is no sound. ■ Increasethevolume.
■ PresstheMutebutton.
The sound is very low. ■ Increasethevolume.
■ SettheautovolumecontroltoON.
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.

Troubleshooting
4-4 Samsung Electronics
5. Channel
Problem Solution
There are no channels available.
■ Checkiftheantennaisproperlyinstalled.
■ PresstheAutoChannelbuttontostorechannels.
■ Contactyourlocalbroadcastingservicestation.
Some channels are not available.
■ Adjusttheposition,angleordirectionoftheantenna.
■ ActivatetheReceptionSensitivityBoostfeature.
■ Contactyourlocalbroadcastingservicestation.
■ UsethenumberkeystoselectaspecificchannelandpressStore/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.

Troubleshooting
Samsung Electronics 4-5
7. Basic Troubleshooting: Diagnosis of LED on the Front Panel
LED
● :Light is On
◑ :Light is Blinking
○ :Light is Off
Power Description
○
This happens when the TV have turned on or the power cord is disconnected.
●
This happens when the power cord is connected.
○→◑→●
The LED blinks, while the unit is starting up or the unit is turning off.
8. Troubleshooting by the Checksum
■ Diagnosisoftroublebythechecksumisneitherreliablenorconvenient.
You can only use the checksume of the current direct-view TV to determine whether the software is corrupted or not.
The Checksum value is determined according to the version of the software loaded on the set.
Therefore, you can determine whether the software has been properly downloaded, if you know the correct checksum for that
version of the software.
You can check the checksum according in the following order.
Factory Mode
→ Checksum → Enter → OutputChecksum(e.g.0xab2b)
■ ChecksumExamples
T-SIXNSAM -1000.0 Checksum = XXXX

Troubleshooting
4-6 Samsung Electronics
9. Flow Chart for Malfunction
Is there something on
the Screen.
Yes Does the OSD menu on the
screen work?
Yes
No
UOCTOPICReplace.
Yes
Is the power cord or the
master switch out of order?
Yes
Yes
Check that the cables ard
properly connected to Main
Board.
No
Connect the cable
No
Is
the cable from the
MainBoardththeCRTAss’y
properly innected?
IsCRThigivoltage
been measured?
Does the TV work?
SOUND IC
MICOM SMD IC
INPUT JACK
DY-JACK
VERTICALIC
MAINTRANS
SMPS-TR
OUTPUTTRQ401
BRIDGEDIODE
TUNER
FBT
EWDRIVER