Samsung RS21N Series User manual

TFT-LCD MONITOR
RS21N*/RS24N*
Manual
SERVICE
TFT-LCD MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignment & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams
11. Panel Description
CONFIDENTIAL

1-1-1 Warnings
1. For continued safety, do not attempt to modify the
circuit board.
2. Disconnect the AC power and DC Power Jack
before servicing.
1-1-2 Servicing the LCD Monitor
1. When servicing the LCD Monitor Disconnect the
AC line cord from the AC outlet.
2. 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:
1. 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.
2. Inspect all protective devices such as nonmetallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.
3. 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).
Figure 1-1. Leakage Current Test Circuit
4. 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
safety-related 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.
RS21N*/RS24N* 1-1
CONFIDENTIAL
1 Precautions
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as
electrical shock.
1-1 Safety Precautions
DEVICE
UNDER
TEST
TEST ALL
EXPOSED METAL
SURFACES
(READING SHOULD
NOT BE ABOVE 0.5mA)
LEAKAGE
CURRENT
TESTER
2-WIRE CORD
ALSO TEST WITH
PLUG REVERSED
(USING AC ADAPTER
PLUG AS REQUIRED) EARTH
GROUND
!

CONFIDENTIAL
2 Product Specifications
2-1 Specifications
LCD Panel TFT-LCD panel, RGB vertical stripe, normally black TFT-LCD panel, RGB vertical stripe, normally black
transmissive, (21.3-Inch) viewable, 0.27 pixel pitch transmissive, (24.06-Inch) viewable, 0.27 pixel pitch
Scanning Frequency Horizontal : 30 kHz ~ 85 kHz (Analog)
Vertical : 55 Hz ~ 85 Hz
Display Colors 16,777,216 Million colors
Maximum Resolution Horizontal : 1600 Pixels 1920 Pixels
Vertical : 1200 Pixels 1200 Pixels
Input Video Signal Analog, 0.7 Vp-p ± 5% positive at 75 Ω,
internally terminated
Input Sync Signal Type : Seperate H/V sync, Composite H/V, Sync-on-Green
Level : TTL level
Maximum Pixel Clock rate 162 MHz 193 MHz
Active Display
Horizontal/Vertical
AC power voltage & Frequency AC 90 ~ 264 Volts, 60~50 Hz ± 3 Hz
Power Consumption 110W (max) 120W (max)
Dimensions
Unit (W x D x H) 25.98 x 8.38 x 18.58 Inches (568.5 x 213 x 472 mm)
25.98 x 8.38 x 18.58 Inches (660 x 213 x 472 mm)
Carton (W x D x H) 30.55 x 24.01 x 13.62 Inches (687 x 608 x 340 mm)
30.55 x 24.01 x 13.62 Inches (776 x 610 x 346 mm)
Weight (Net / Gross)
Environmental Considerations Operating Temperature : 50°F ~ 104°F (10°C ~ 40°C)
Humidity : 10 % ~ 80 %
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Humidity : 5 % ~ 95 %
TV System
Sound Characteristics •Max Internal speaker Out : Right c5 W / Leftc5 W
•Bass control Range : -6 ± 2dB ~ +6 ± 2dB
•TREBLE control Range : -10 ± 2dB ~ +10 ± 2dB
•Output frequency : RFc80 Hz~15 KHz /A/Vc80 Hz~20 KHz
•Line out : RFc80 Hz~15 KHz /A/Vc80 Hz~20 KHz
•SyncMaster RS21N*/RS24N* comply with SWEDAC (MPRII) recommendations for reduced electromagnetic fields.
•Designs and specifications are subject to change without prior notice.
RS21N*/RS24N* 2-1
Item
Description
RS21N* RS24N*
518.4 ± 3 mm / 324 ± 3 mm
10.0 kg (26.78 lbs) / 20.2 kg ( 49.6 lbs) 12.15 kg (26.78 lbs) / 22.5 kg ( 49.6 lbs)
Antena Input 75Ω, Coaxial Cable
Tunning Frequency Synthesize
Color NTSC
Sound BTSC, A2 STEREO, EIAJ

3-1-1 Removing the Stand
1. Disconnect power cord and signal cable.
2. Remove 2 screws and bushing on the each
side of stand.
3-1-2 Main Body Disassembly
1. Remove the tuner-box.
2. Remove 3 cap-screw and screws on the Rear
Cover.
3. Remove Rear Cover from the Front Cover.
4. Remove 1 screw on the PCB and remove the
tuner-guide.
5. Remove 9 screws on the shield and remove
the shield.
6. Disconnect Inverter wire, Function PCB wire,
Audio wire, Interface wire, and IR sensor wire .
Remove 6 screws on the main PCB and 4
screws on the Inverter PCB.
7. Remove the main PCB Assembly and Inverter
PCB.
8. Remove 4 screws on the Rear Panel Bracket.
9. Remove the Bracket Assembly from the Front
Cover.
10. Remove 4 screws on the panel and then
remove the panel.
11. Remove 8 screws on the Bracket Hinge.
12. Remove the Braket Hinge.
RS21N*/RS24N* 3-1
CONFIDENTIAL
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
RS21N*/RS24N* monitor.
WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling
these components.
3-1 Disassembly
Cautions:1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.

CONFIDENTIAL
RS21N*/RS24N* 4-1
4 Alignments and Adjustments
This section of the service manual explains how to use the DDC JIG to adjust the black, red, green, and blue
levels of the FPD when you replace the AD Board, and how to update the microprocessor when you
change the Panel or Lamp(s).
4-1 General Alignment Instuction
1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation.
Check the basic characteristics such as height, horizontal and vertical sync.
2. Use the specified test equipment or its equivalent.
3. Correct impedance matching is essential.
4. Avoid overload. Excessive signal from a sweep generator might overload the front-end
of the TV. When inserting signal markers,do not allow the marker generator to distort
test result.
5. Connect the TV only to an DC power source with voltage and frequency as specified on
the backcover nameplate.
6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure
that the power cord is disconnected before replacing any parts.
7. To protect aganist shock hazard,use an isolation transform.
4-2 Adjustment Procedures
Use the following procedures whenever you replace the AD Board, Panel, or one or both of the Lamps.
4-2-1 (a) Color Auto Adjustment
1. After displaying 16-Gray pattern of XGA mode press channel “+”, ”–”, and “menu” buttons.
2. During normal execution of Auto Algorithm the screen image may change. If Auto Algorithm does
not excute properly, try one more.
3. After normal execution of Auto Algorithm, confirm optimal settings by observing the contrast of
several different patterns on the display.
4-2-2 (b) White Balance Adjustment
1. After displaying white pattern (on the WUXAG mode), press channel “+”,”–” and “Exit” buttons.
2. During normal execution df white balance the screen, image may change.

CONFIDENTIAL
RS21N*/RS24N* 5-1
5 Troubleshooting
Does proper DC 14 V appear at
DC jack connected to CN800? Check SMPS PCB and Adapter.
Yes
No
Does proper DC 5 V appear at
Pin 2 of IC815 and IC816? Check IC815 and IC 816
Check IC811 and IC817.
Yes
No
Does proper DC 2.5 V appear at
Pin 2 of IC804 and IC806? Check IC804 and IC806.
Yes
No
Does proper DC 3.3 V appear at
Pin 2 of IC800, IC801 and IC805? Check IC800, IC801 and IC805.
Yes
No
Does proper DC 5 V appear at
Pin 2 of IC810? Check IC810.
Yes
No
5-1 No Power

CONFIDENTIAL
RS21N*/RS24N* 6-1
6 Exploded View and Parts List
6-1 RS21N*

CONFIDENTIAL
- BN94-00268A ASSY PCB MAIN RS21NS SNA
C165 2401-000039 C-AL 1000uF,20%,16V,GP,TP,10x16,5
C167 2401-000039 C-AL 1000uF,20%,16V,GP,TP,10x16,5
C172 2401-003717 C-AL 220UF,20,50V,WT,TP,10 X 12.5 MM,5
C310 2409-001044 C-ORGANIC 100UF,+-20%,16V,WT,TP,8X10.5,5
C348 2409-001044 C-ORGANIC 100UF,+-20%,16V,WT,TP,8X10.5,5
C349 2401-003717 C-AL 220UF,20,50V,WT,TP,10 X 12.5 MM,5
C403 2409-001044 C-ORGANIC 100UF,+-20%,16V,WT,TP,8X10.5,5
C804 2409-001044 C-ORGANIC 100UF,+-20%,16V,WT,TP,8X10.5,5
C805 2409-001044 C-ORGANIC 100UF,+-20%,16V,WT,TP,8X10.5,5
C918 2409-001044 C-ORGANIC 100UF,+-20%,16V,WT,TP,8X10.5,5
CIS BN63-00086A SHIELD-D_SUB RU24NS,SPTE,T0.5,-,-,-,-
CN101 3722-001751 JACK-PIN 1P,-,NI,GRN,-
CN102 3722-001750 JACK-PIN 1P,-,NI,BLU,-
CN103 3722-001784 JACK-PIN 1P,-,SN,RED,-
CN104 3722-001751 JACK-PIN 1P,-,NI,GRN,-
CN105 3722-001750 JACK-PIN 1P,-,NI,BLU,-
CN106 3722-001784 JACK-PIN 1P,-,SN,RED,-
CN107 3722-001782 JACK-PIN 1P,-,SN,WHT,-
CN108 3722-001784 JACK-PIN 1P,-,SN,RED,-
CN109 3722-001055 JACK-PHONE 5P/2C,3.6PI,AG,BLK,#16-22 SNA
CN110 3722-001782 JACK-PIN 1P,-,SN,WHT,-
CN111 3722-001784 JACK-PIN 1P,-,SN,RED,-
CN112 3711-004228 CONNECTOR-HEADER BOX,6P,1R,2MM,ANGLE,SN SNA
CN113 3711-004261 CONNECTOR-HEADER BOX,12P,1R,2MM,ANGLE,SN SNA
CN200 3701-001219 CONNECTOR-DSUB 15P,3R,FEMALE,ANGLE,AUF
CN301 3701-001219 CONNECTOR-DSUB 15P,3R,FEMALE,ANGLE,AUF
CN401 3711-000024 CONNECTOR-HEADER BOX,3P,1R,2.5mm,STRAIGHT,SN SNA
CN800 3722-001267 JACK-DC POWER 4P,-,SN,BLK,- SNA
IC106 1201-001834 IC-AUDIO AMP
TDA7360HS,MULTIWATT11H,11P,771MIL,SINGLE,20DB/26DB,PLASTIC,18V,36W,-40TO+150C,-,
IC404_SOCK 3704-000255 SOCKET-IC 32P,DIP,SN,2.54mm
- BN97-00054U ASSY MICOM ES15AS,-,-,-,-,-,-,-,- SNA
IC404 1102-001121 IC-EPROM
27C2001,256Kx8Bit,DIP,32P,600MIL,100nS,5V,10%,CERAMIC,0to+70C,100uA,CMOS,ST
CIS BN46-00009Q MICOM-S/W RS21NS,-,-,-,-,-,- SNA
- BN97-00068A ASSY SMD-MAIN RS21NS SNA
BD102 2703-001334 INDUCTOR-SMD 1.5uH,10%,2x1.25x0.85mm
BD103 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD104 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD105 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD106 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD107 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD108 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD109 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD110 3301-001163 CORE-FERRITE BEAD AB,80ohm,2x1.25x1mm,300mA,TP,FERRITE,0.08ohm
BD120 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD121 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD122 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD123 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD124 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD125 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD201 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD202 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
BD203 3301-001176 CORE-FERRITE BEAD AB,2x1.25x0.9mm,-,-
RS21N*/RS24N* 7-1
Loc. No. Code No. Description Specification Remarks
7 Electrical Parts List
7-1 Main PCB Parts

CONFIDENTIAL
8 Block Diagram
RS21N*/RS24N* 8-1
Scaler
Jaguar200
Analog to Digital
Converter
(AD9884)
Analog
RGB
PC
Analog
Analog
RGB
PC
Analog
Analog to Digital
Converter
(AD9884)
Enhancer
(FLI2220)
Double Scan Rator
(FLI2200)
Memory
K4S643232C-TC70
ADC
(AD9883)
Video Decoder
(VPC3230)
Caption Decoder
(Z86129)
Audio Amp.
(TPA032)
Memory
K4S6432C-TC60
Memory
K4S6432C-TC60
MICOM
(TSC80251G2D)
Scaler
Jaguar200
Sound Processor
(MSP3451)
3X16
RGB
3X16
RGB LVDS
DS90C387
RGB
Caption
Vout
24" LCD
Y
Pb
Pr
DTV
Ready
YUV
DVD input
RCA-Jack
VCR input Tuner CVBS PC Audio Video Audio RE Audio
SPKL SPKR

RS21N*/RS24N* 9-1
CONFIDENTIAL
VOLO+
VOL-
CH+
CH-
EXIT
MENU
BUZZER
LED
AUTO
PIP
SOURCE
GND
CIN
GND
YIN
GND
VCR
SCL4
SCR4
LINE_L
LINE_R
GND
LINE-OUT
GND
GND
NC
GND
NC
VID_DATA
GND
QSS_IF
CHK_TVNER
NC
+5V_TVNER
GND
VID_SCLK
GND
+33V_T
+5V_TUNER
RF_CVBS
SCR1 SCL1 SCR1 SCL1
GND Y Y GND PB PB GND PR PR GND SCR2 SCR2 GND SCR2 SCR2
CN700
CN109
CN104 CN105 CN106 CN110 CN111
GND Y Y GND PB PB GND PR PR GND SCR2 SCR2 GND SCR2 SCR2
CN101 CN102 CN103 CN107 CN108
CN113
CN301
GND
SROUT
GND
LINE_OUT
GND
SROUT
CN112
CN800
CN702
9 Wiring Diagram