Samsung T220HD - SyncMaster - 22" LCD Monitor User manual

LCD-Monitor
Chassis : LS22TDD / LS20TDD
Model :
T220HD / T200HD
SERVICEManual
TFT-LCD Monitor Contens
T220HD / T200HD
Refer to the service manual in the GSPN (see the rear cover) for the more information.
1. Precautions
2. Product specifications
3. Disassembly and Reassemble
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
7. Schematic Diagram

Contents
1. Precautions.............................................................................................................. 1-1
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 specifications............................................................................................ 2-1
2-1. Feature & Specifications................................................................................................. 2-1
2-2. Spec Comparison to the Old Models.............................................................................. 2-3
2-3. Accessories .................................................................................................................... 2-4
3. Disassembly and Assembly ................................................................................... 3-1
3-1. Disassembly ................................................................................................................... 3-1
4. Troubleshooting ...................................................................................................... 4-1
4-1. First Checklist for Troubleshooting ................................................................................ 4-1
4-2. No Power........................................................................................................................ 4-2
4-3. No Video (Analog PC) ................................................................................................... 4-4
4-4. No Video (Digital-HDMI) ................................................................................................. 4-7
4-5. No Picture (Tuner_CVBS) ............................................................................................ 4-10
4-6. No Picture (Tuner_DTV) ............................................................................................... 4-13
4-7. No Sound...................................................................................................................... 4-16
4-8. Faults and Corrective Actions....................................................................................... 4-19
4-9. Adjustment.................................................................................................................... 4-20
4-11. Service Adjustment ..................................................................................................... 4-21
5. Exploded View & Part List ...................................................................................... 5-1
5-1. Exploded View -20”......................................................................................................... 5-1
5-2. Parts List......................................................................................................................... 5-3
5-3. Exploded View -22”....................................................................................................... 5-30
5-4. Parts List....................................................................................................................... 5-32
6. Wiring Diagram ........................................................................................................ 6-1
6-1. Wiring Diagram - Main Board ......................................................................................... 6-1
6-2. Wiring Diagram - IP Board.............................................................................................. 6-2
6-3. Connector Functions ...................................................................................................... 6-3
6-4. Cables ............................................................................................................................ 6-3
7. Schematic Diagram ................................................................................................. 7-1
7-1. Circuit Descriptions......................................................................................................... 7-1
7-2. Block description ............................................................................................................ 7-2
7-3. Schematic Diagrams ...................................................................................................... 7-3
7-3-1. Schematic Diagrams (POWER) .................................................................................. 7-3
7-3-2. Schematic Diagrams (SOUND) .................................................................................. 7-4
7-3-3. Schematic Diagrams -SIGNAL INPUT ( HDMI1,HDMI2,DSUB,AUDIO) ..................... 7-5
7-3-4. Schematic Diagrams - SIGNAL INPUT ( SCART,Component).................................... 7-6
7-3-5. Schematic Diagrams - Scaler/LVDS Output ................................................................ 7-7
7-3-6. Schematic Diagrams - Tuner....................................................................................... 7-8
7-3-7. Schematic Diagrams - DTV Audio............................................................................... 7-9
7-3-8. Schematic Diagrams - DTV IC Block ........................................................................ 7-10
7-3-9. Schematic Diagrams - PCMCIA ................................................................................ 7-11
7-3-10. Schematic Diagrams - TV PCMCIA......................................................................... 7-12
7-3-11. Schematic Diagrams - SIGNAL INPUT ( DVI) ......................................................... 7-13

GSPN (Global Service Partner Network)
Area Web Site
North America http://service.samsungportal.com
Latin America http://latin.samsungportal.com
CIS http://cis.samsungportal.com
Europe http://europe.samsungportal.com
China http://china.samsungportal.com
Asia http://asia.samsungportal.com
Mideast & Africa http://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.
© 2008 Samsung Electronics Co.,Ltd.
All rights reserved.
Printed in Korea
P/N: BN82-00361A-00

1-1
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.
Disconnect the AC power and DC power jack before servicing.
1-1-2. Servicing the LCD Monitor
When servicing the LCD Monitor, Disconnect the AC line cord from the AC outlet.
It is essential that service technicians have an accurate voltage meter available at all times. Check the calibration of
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
chassis and other metal parts in the monitor.
Inspect all protective devices such as nonmetallic control knobs, insulating materials, cabinet backs, adjustment and
compartment covers or shields, isolation resistorcapacitor networks, mechanical insulators, etc.
Leakage Current Hot Check (Figure 1-1):
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).
With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. With the unit’s AC switch
first 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 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.
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DEVICE
UNDER
TEST
(READING SHOULD)
NOT BE ABOVE 0.5mA
LEAKAGE
CURRENT
TESTER
TEST ALL
EXPOSED METAL
SURFACES
2-WIRE CORD
*ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
GROUND Figure 1-1. Leakage Current Test Circuit

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 conflict 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
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
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
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,
input terminals and earphone jacks).
Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON.
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;
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 field-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
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
accumulation of an electrostatic charge.
Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESDs.
Use only a grounded-tip soldering iron to solder or desolder ESDs.
Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static” can generate
electrical charges sufficient to damage ESDs.
Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs
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
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,
or lifting your foot from a carpeted floor can generate enough static electricity to damage an ESD.
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1-3
1. Precautions
1-4. Installation Precautions
For safety reasons, more than two people are required for carrying the product.
Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock.
Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal
temperature may cause fire.
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.
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.
Keep the antenna far away from any high-voltage cables and install it firmly. Contact with the highvoltage cable or the
antenna falling over may cause fire or electric shock.
When installing the product, leave enough space (10cm) between the product and the wall for ventilation purposes.
A rise in temperature within the product may cause fire.
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1-4
1. Precautions
Memo

2-1
2. Product specifications
2. Product specifications
2-1. Feature & Specifications
Model T220HD / T200HD
Feature
Supreme Digital Interface & Networking
- With a built-in HD digital tuner, it supports HD broadcasting with no particular set-top box and provides simple
access with a single remote control.
Excellent Picture Quality
- DNIe technology provides life-like clear images.
Dynamic Contrast
- Automatically detects the input visual signal and adjusts to create optimum contrast.
SRS TruSurround XT
- SRS TruSurround XT provides a virtual Dolby surround system.
Convenience
-The TV utilizes the HDMI system to implement perfect digital sound and picture quality.
ሪሪሪሪሪSpecifications
Item
Description
T220HD T200HD
LCD Panel TFT-LCD Panel, RGB Vertical strip,
normaly White, 22-Inch viewable,
0.282(H) X 0.282(V)mm Pixel Pitch
TFT-LCD Panel, RGB Vertical strip,
normaly White, 20.1-Inch viewable,
0.258(H) X 0.258(V)mm Pixel Pitch
Scanning Frequency Horizontal : 30KHz ~ 81KHz(Automatic)
Vertical: 56Hz ~ 75Hz(Automatic)
Horizontal :30KHz ~ 81KHz(Automatic)
Vertical:56Hz ~ 75Hz(Automatic)
Display Colors 16.7 Million colors 16.7Million colors
Maximum resolution Horizontal: 1680pixels
Vertical: 1050pixels
Horizontal : 1680pixels
Vertical:1050pixels
Input Signal Analog 0.7Vp-p±10% positive at
75Ω,internally terminated
Analog 0.7Vp-p±10% positive at
75Ω,internally terminated
Input Sync Signal Type: separate H/V,composite
Level : TTL Level
Type: separate H/V,composite
Level : TTL Level
Maximum Pixel Clock rate 146.250MHz 146.250MHz
Active Display
(Horizontal/Vertical) 473.76(H) X 296.1(V) 433.44(H) X 270.9(V)
AC power voltage &
Frequency AC 110 ~ 240V, 50 ~ 60 Hz AC110 ~ 240V, 50 ~ 60Hz
Power Consumption 8⾘88⾘8Dimensions Set
(W x D x H)
520x215x441.5mm (After installation stand)
520x86.5x373.5mm (Without stand)
486x215x417.5mm (After installation stand)
486x86x350mm (Without stand)
Weight Set
(After installation Stand) 5.8kg 5.6kg
TV System Tuning Frequency Synthesize
System PAL, SECEM
Sound MONO, STEREO, NICAM

2-2
2. Product specifications
Specifications
Item
Description
T220HD T200HD
Environmental Considerations Operating Temperature: 50˚C ~ 104˚F(10˚C ~ 40˚C)
Operating Humidity : 10% ~ 80%
Storage Temperature: -4˚C ~ 113˚C(-20˚C ~ 45˚C)
Storage Humidity: 5% ~ 95%
Antenna Input 75Ω
Sound Characteristic -MAX Internal speaker Out : Right : 3W / Left : 3W
-BASS Control Range : -8 dB ~ + 8dB
-TREBLE Control Range : -8 dB ~ +8 dB
-Headphone Out : 10 mW MAX
-Output Frequency : RF : 80 Hz ~ 15 kHz
A/V : 80 Hz ~ 20 kHz

2-3
2. Product specifications
2-2. Spec Comparison to the Old Models
Model T220HD / T200HD Curie (225MD)
Design
Screen Size 20” / 22” 22”
Frequency
Horizontal
Vertical
Display Color
30 ~ 81 kHz
56 ~ 75 Hz
16,777,216 colors
30 ~ 81 kHz
56 ~ 75 Hz
16,777,216 colors
PC Resolution
Maximum mode WXGA, 1680 x 1050 @ 60 Hz 1680 x 1050
Input Signal
Sync Signal
Video Signal
H/V Separate, TTL, P. or N.
0.7 Vp-p @ 75ohm
H/V Separate, TTL, P. or N.
0.7 Vp-p @ 75ohm
Power Consumption
Normal
Power Saving
22” 58W < 2W
20” 50W < 2W 58W < 2W
*Color Effect
- Grey scale: Images are displayed in a grey tone on the screen.
- Green: Images are displayed in a green tone on the screen.
- Aqua: Images are displayed in a blue tone on the screen.
- Sepia: Images are displayed in a brown tone on the screen.
Image Size : : If the resolution is not wide resolution, this option allows the screen size to be selected as normal or wide.

2-4
2. Product specifications
2-3. Accessories
Product Description Ccde. No Remark
Remote Control
&
Batteries (AAA x 2)
BN59-00624A
Samsung Electronics
Service center
Power Cord 3903-000085
Stand Body BN96-07347B
Stand Base BN96-07345A
D-Sub Cable BN39-00244G
CBF SIGNAL-DVI(D) BN39-00246K
User’s Guide,
Monitor Driver,
Natural Color Pro Software
BN96-07540A
Cleaning Cloth BN63-01798A

ZTX3. 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. Remove the signal cable and the power cord before beginning the disassembly.
Description Photo Screws
1. Place monitor face down on cushioned table.
Remove Stand, then remove 2 marked screws
from the rear cover.
Caution : If you do not tilt the stand and use too
much force to remove it, the connection
pin may break.
2. Remove the cover and the LCD panel using the
provided jig on both grooves at the bottom.

ZTYG3. Disassembly and Assembly
Description Photo Screws
3. Insert a flat screwdriver into the groove and then
lift up and remove the cover.
4. After remove COVER-REAR, then disconnect
SPEAKER , FUNCTION wire.
5. Disconnect LVDS cable from panel.

ZTZ3. Disassembly and Assembly
Description Photo Screws
6. After disconnecting SHIELD-LAMP of left side,
disassemble lamp wire between panel and IP
Board.
7. Remove 8 marked SCREW of left picture.
Disconnect IP board.
ⲼReassembly procedures are in the reverse order
of disassembly procedures.
8. Remove the LCD panel.

ZT[G3. Disassembly and Assembly
Description Photo Screws
9. Remove the IR module by tilting the left snap to
the right.
10. Remove the LED module by sliding the snap
designated in the right figure backwards.
11. Remove the two (2) screws and then remove the
holders from the four (4) snaps designated in the
right figure using the provided jig.

ZT\3. Disassembly and Assembly
Description Photo Screws
12. Remove the two (2) connectors.
Caution : Servicing is not supported for the PCB.ⶺ"TTFNCMZ13. The assembly is in the reverse order of the
disassembly.
14. Connect the disassembled snap and the LED
module again.
15. Fix the connecting wire with filament tape
Caution : If the wire is damaged when closing the
cover, an operating error may occur.
Therefore, make sure to close the
cover after fixing it with filament tape.
filament tape
Ⲽ5IFBTTFNCMZJTJOUIFSFWFSTFPSEFSPGEJTBTTFNCMZ

ZT]G3. Disassembly and Assembly
Memo

4-1
4. Troubleshooting
4. Troubleshooting
4-1. First Checklist for Troubleshooting
Check the various cable connections first.
- Check to see if there is a burnt or damaged cable.
- Check to see if there is a disconnected cable connection or a connection is too loose.
- Check to see if the cables are connected according to the connection diagram.
Check the power input to the Main Board.
Check the following circuits.
• No raster appears: Function PBA, Main PBA, I/P PBA
• 55V develop but no screen: Main PBA
• 5V does not develop: I/P PBA
Check the voltage in and out between the IP⳪Main Board, between the IP⳪Panel, and between the Main LVDS
Boards.
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4-2
4. Troubleshooting
4-2. No Power
Symptom Though the power swtich on, the LED power off and the screen is blank.T
Major
checkpoints
Check Power cable.
Check whether the Lamp connector is connected correctly to the IP.
Check whether the power cable is connected correctly to the MAIN.
Check whether the Function cable is connected correctly to the MAIN.
TTTT
Diagnostics
Main Board Front
CN1001
C1109
Yes
No
LAMP off, power indicator
LED red color?
Check a connection a
power cable.
Yes
No
Does proper DC 13V appear
at DC5V. Change a Assy PCB Power.
Yes
No
Does proper DC13V appear
at C1004? Change a Assy PCB Power.
Yes
No
Does proper DC3.3V, 1.2v appear
at C1109?
Check IC1013, IC1005.
Change a main PBA.
No
A power is supplied to set?
Check a other function.(No picture
part) Replace a lcd panel.
Caution Make sure to disconnect the power before working on the IP board.

4-3
4. Troubleshooting
4-2-1. Circuit diagrams when the power does not turn on
5:GND
4:GND
3:GND
9:ON/OFF
8:A-DIMMING
7:5.1V/3.0A
6:5.1V/3.0A
2:13V/0.65A
1:PWM
L:INVERTER ON
H:INVERTER OFF
1
1
21
R1004
2 1
C1004
2 1
C1005
MGND2 MGND1
9
8
7
6
5
4
3
2
1
CN1001
21 R1301
3
2
1
Q1005
1
21
R1001_DE
21
C1002
1
1
1
2 1
R1032
1 2 1
R1031
1
2 1
C1003
1
21
C1001_22
2 1
R1002
1/10W
0OHM
PWM_DIMMING_OUT
0OHM
100NF
4.7KOHM
FGND
A13V
B5V
25V
100NF
FGND
A5V
B5V
0OHM
4.7KOHM
4.7KOHM
SW_INVERTER
CN_SMD_S_009
FGND
FGND
1UF
50V
25V
100UF KTC3875S-Y
6.3V
100UF
E
B
C
5A (MAX)
HIGH:ON
LOW:OFF
8
7
6
54
3
2
1
IC1023
TP1001 R1030
Q1006
R1043
C1107 R1040
C1120
BD1022
2 1
C1110
TP1002
3
2
1
IC1013
2 1
C1109 C1112
21
BD1034
6.3V
100UF
BEAD_CHIP
B3.3V_DTV
B3.3VD
100NF
25V
FGND
AP1084K33A
FGND FGNDFGND
B5V
BEAD_CHIP
100NF
25V
FGND
1/10W
10KOHM
FGND
2SC2412K-Q
SI4435BDY-T1-E3
POWER_ON
1/10W
10KOHM
1/10W
100KOHM
A5V
1UF
10V
6.3V
100UF
E
BC
GND
OUTIN