Text preview for : MO17W.pdf part of Samsung MO17W* TFT-LCD MONITOR MO17W* Service Manual



Back to : MO17W.rar | Home

CONFIDENTIAL
TFT-LCD MONITOR
MO17W*




SERVICE Manual

TFT-LCD MONITOR CONTENTS
1. Precautions

2. Product Specifications

3. Disassembly & Reassembly

4. Troubleshooting

5. Exploded View & Parts List

6. Electrical Parts List

7. Block Diagram

8. Wiring Diagram

9. Schematic Diagrams

10. Panel Description
Samsung Electronics Co.,Ltd.
416, Maetan-3Dong, Paldal-Gu, Suwon City, Kyungki-Do, Korea.
Printed in Korea
P/N : BN82-00088A-00
http://www.samsungmonitor.com (SyncMaster Worldwide)
http://www.samsung-monitor.com (SyncMaster USA)
http://www.sec.co.kr/monitor (Korea)
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

1-1-1 Warnings
1. For continued safety, do not attempt to modify the (READING SHOULD
circuit board. NOT BE ABOVE 0.5mA)


2. Disconnect the AC power and DC Power Jack
before servicing. DEVICE
LEAKAGE
CURRENT
UNDER TESTER
3. When the chassis is operating, semiconductor TEST
TEST ALL
heatsinks are potential shock hazards. EXPOSED METAL
SURFACES


1-1-2 Servicing the LCD Monitor 2-WIRE CORD



1. It is essential that service technicians have an
accurate voltage meter available at all times. ALSO TEST WITH
PLUG REVERSED
Check the calibration of this meter periodically. (USING AC ADAPTER
PLUG AS REQUIRED) EARTH
GROUND

1-1-3 Fire and Shock Hazard
Figure 1-1. Leakage Current Test Circuit
Before returning the monitor to the user, perform the
following safety checks:
4. With the unit completely reassembled, plug the AC
1. Inspect each lead dress to make certain that the
line cord directly into a 120V AC outlet. With the
leads are not pinched or that hardware is not
unit's AC switch first in the ON position and then
lodged between the chassis and other metal parts in
OFF, measure the current between a known earth
the monitor.
ground (metal water pipe, conduit, etc.) and all
2. Inspect all protective devices such as nonmetallic exposed metal parts, including: metal cabinets,
control knobs, insulating materials, cabinet backs, screwheads and control shafts. The current
adjustment and compartment covers or shields, measured should not exceed 0.5 milliamp. Reverse
isolation resistor-capacitor networks, mechanical the power-plug prongs in the AC outlet and repeat
insulators, etc.
the test.
3. Leakage Current Hot Check (Figure 1-1):
WARNING: Do not use an isolation transformer
during this test. 1-1-4 Product Safety Notices
Use a leakage current tester or a metering system Some electrical and mechanical parts have special
that complies with American National Standards safety-related characteristics which are often not
Institute (ANSI C101.1, Leakage Current for evident from visual inspection. The protection they give
Appliances), and Underwriters Laboratories (UL may not be obtained by replacing them with
components rated for higher voltage, wattage, etc. Parts
Publication UL1410, 59.7).
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.




MO17W* 1-1
1 Precautions
CONFIDENTIAL
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
1. Always unplug the unit's AC power cord from the 4. Check the insulation between the blades of the AC
AC power source and disconnect the DC Power plug and accessible conductive parts (examples:
Jack before attempting to: metal panels, input terminals and earphone jacks).
(a) remove or reinstall any component or assembly, 5. Insulation Checking Procedure: Disconnect the
(b) disconnect PCB plugs or connectors, (c) connect power cord from the AC source and turn the power
a test component in parallel with an electrolytic switch ON. Connect an insulation resistance meter
capacitor. (500 V) to the blades of the AC plug.
2. Some components are raised above the printed The insulation resistance between each blade of the
circuit board for safety. An insulation tube or tape AC plug and accessible conductive parts (see
is sometimes used. The internal wiring is above) should be greater than 1 megohm.
sometimes clamped to prevent contact with
6. Always connect a test instrument's ground lead to
thermally hot components. Reinstall all such
the instrument chassis ground before connecting
elements to their original position.
the positive lead; always remove the instrument's
3. After servicing, always check that the screws, ground lead last.
components and wiring have been correctly
reinstalled. Make sure that the area around the
serviced part has not been damaged.



1-3 Electrostatically Sensitive Devices (ESD) 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.

1. Immediately before handling any semiconductor 6. Do not remove a replacement ESD from its
components or assemblies, drain the electrostatic protective package until you are ready to install it.
charge from your body by touching a known earth Most replacement ESDs are packaged with leads
ground. Alternatively, wear a discharging wrist- that are electrically shorted together by conductive
strap device. To avoid a shock hazard, be sure to foam, aluminum foil or other conductive materials.
remove the wrist strap before applying power to 7. Immediately before removing the protective
the monitor. material from the leads of a replacement ESD,
2. After removing an ESD-equipped assembly, place it touch the protective material to the chassis or
on a conductive surface such as aluminum foil to circuit assembly into which the device will be
prevent accumulation of an electrostatic charge. installed.
3. Do not use freon-propelled chemicals. These can Caution: Be sure no power is applied to the
generate electrical charges sufficient to damage chassis or circuit and observe all
ESDs. other safety precautions.
4. Use only a grounded-tip soldering iron to solder or
desolder ESDs. 8. Minimize body motions when handling
unpackaged replacement ESDs. Motions such as
5. Use only an anti-static solder removal device. Some brushing clothes together, or lifting your foot from
solder removal devices not classified as "anti-static" a carpeted floor can generate enough static
can generate electrical charges sufficient to damage electricity to damage an ESD.
ESDs.




1-2 MO17W*
CONFIDENTIAL
2 Product Specifications
2-1 Specifications

Description
Item
Analog Digital

LCD Panel TFT-LCD panel, RGB vertical stripe, normally white transmissive,
17-Inch viewable, 0.2895 pixel pitch

Scanning Frequency Horizontal : 30 KHz ~ 61 KHz (Automatic)
Vertical : 56 Hz ~ 75 Hz

Display Colors 16.2 Million colors

Maximum Resolution Horizontal : 1280 Pixels @ 60 KHz
Vertical : 768 Pixels @ 75 Hz

Input Video Signal Analog, 0.7 Vp-p ± 5% positive at 75 , TMDS
internally terminated

Input Sync Signal Type : Separate H/V sync., In case of using option cable, Composite, Automatic Synchronization without external switch
Level : TTL level (V high 2.0 V, V low 0.8 V)

Maximum Pixel Clock rate 80 MHz

Active Display 370.560 (H) ± 3 mm
Horizontal/Vertical 222.336 (V)± 3 mm

AC power voltage & Frequency AC 90 ~ 264 Volts, 60/50 Hz ± 3 Hz

Power Consumption 40 W (max), 38 W (normal)

Dimensions
Unit (W x D x H) 431 x 216 x 362.3 mm (17.0 x 8.5x 14.3 inches)
Carton (W x D x H) 532 x 378 x 145 mm (20.9 x 14.9 x 5.7 inches)
Weight (Net/Gross)
Normal stand 4.7 kg (10.4 lbs) / 6.8 kg (15.0 lbs)
Multi stand 4.8 kg (10.6 lbs) / 6.9 kg (15.2 lbs)

Environmental Considerations Operating Temperature : 41°F ~ 95°F (5°C ~ 35°C)
Humidity : 10 % ~ 80 %
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Humidity : 5 % ~ 95 %

· MO17W* compies with TCO99 recommendations for reduced electromagnetic fields.
· Designs and specifications are subject to change without prior notice.




MO17W* 2-1
2 Product Specifications
CONFIDENTIAL
2-2 Pin Assignments

2-2-1 15Pin D-Sub

Pin No. Separate Composite Sync-on-green
1 Red Red Red
2 Green Green Green + H/V Sync.
3 Blue Blue Blue
4 GND GND GND
5 GND (DDC Return) GND (DDC Return) GND (DDC Return)
6 GND-Red GND-Red GND-Red
7 GND-Green GND-Green GND-Green
8 GND-Blue GND-Blue GND-Blue
9 No Connection No Connection Not Used
10 GND-Sync/Self Test GND-Sync/Self Test GND-Sync./Self Test
11 GND GND GND
12 DDC Data DDC Data DDC Data
13 Horizontal Sync. H/V Sync. Not Used
14 Vertical Sync. Not Used Not Used
15 DDC Clock DDC Clock DDC Clock




2-2-2 DVI-D

Pin No. Signal Assignment Pin No. Signal Assignment Pin No. Signal Assignment

1 T.M.D.S. Data2- 9 T.M.D.S. Data1- 17 T.M.D.S. Data0-
2 T.M.D.S. Data2+ 10 T.M.D.S. Data1+ 18 T.M.D.S. Data0+
3 T.M.D.S. Data2 Shield 11 T.M.D.S. Data1 Shield 19 T.M.D.S. Data0 Shield
4 No Connect 12 No Connect 20 No Connect
5 No Connect 13 No Connect 21 No Connect
6 DDC Clock 14 +5V Power 22 T.M.D.S. Clock Shield
7 DDC Data 15 Ground (for +5V) 23 T.M.D.S. Clock+
8 No Connect 16 Hot Plug Detect 24 T.M.D.S. Clock-




2-2 MO17W*
2 Product Specifications
CONFIDENTIAL
2-3 Timing Chart

This section of the service manual describes the timing that the computer industry recognizes as standard
for computer-generated video signals.

2-3-1 LCD Panel Mode : 1 mode




Definition of Terms "Active"Video Blanking
Video
Back Top/Left "Addressable"Video Bottom/Right Front Back
Sync Porch Border (Addr Time) Border Porch Sync Porch
HSync
VSync
Blank Start Blank Time
Sync Start Sync
Time




MO17W* 2-3
2 Product Specifications
CONFIDENTIAL
2-3-2 Supported Modes (1)




2-4 MO17W*
2 Product Specifications
CONFIDENTIAL
2-3-2 Supported Modes (2)




MO17W* 2-5
2 Product Specifications
CONFIDENTIAL
2-3-2 Supported Modes (3)




2-6 MO17W*
CONFIDENTIAL
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
MO17W* monitors.

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.



3-1-1 Main Body Disassembly

1. Locate the monitor on the table
face down.




2. Loosen the snaps hinge cap
through the slot in cover rear.




3. Remove the hinge cap &
connector-shield.




MO17W* 3-1
3 Disassembly and Reassembly
CONFIDENTIAL
4. Remove 2 flat head screws from
the hinge mounting.
Do not remove the screw for
cable clamp.




5. Disconnect the stand cable from
socket and remove stand
assembly.




6. Remove 2 screws on cover rear.




7. Open the cover rear.




8. Remove the 8 panel screws.




3-2 MO17W*
3 Disassembly and Reassembly
CONFIDENTIAL
9. Disconnect the function cable
from the connector on PCB.




10. Open the cover shield.




MO17W* 3-3
3 Disassembly and Reassembly
CONFIDENTIAL
3-2 Replacement Order of Lamp Assemblies


1. After confirm there is nothing
on the desk
turn the LCD module over
and put it on a flat desk.




2. Push down the stopper and
slide the lamp unit out.




3. Remove the lamp
unit from the LCD
module.




3-4 MO17W*
3 Disassembly and Reassembly
CONFIDENTIAL
4. Attach the new lamp
units on the LCD module :
opposite process 2 and 3




* Replacement of lamp unit should be done at the power off state on a clean work bench.



3-3 Reassembly

Reassembly procedures are in the reverse order of disassembly procedures.




MO17W* 3-5
3 Disassembly and Reassembly
CONFIDENTIAL
Memo




3-6 MO17W*
CONFIDENTIAL
4 Troubleshooting
Notes: 1. Before troubleshooting, setup the PC's display as below.
· Resolution: 1280 x 768
· H-frequency: 48 KHz
· V-frequency: 60 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
· No raster appears: Stand PCB, Main PCB
· 14V develop but no screen: Main PCB
· 14V does not develop: Main PCB
4. If you push and hold the Exit for more than 5 seconds, the monitor automatically returns back
to the factory preset.



4-1 No Power

Does proper DC 14V No Check signal cable and
appear at DC jack and
power adaptor and CN201.
Pin 39, 40, 41 of CN201?

Yes

Does proper DC 5V, DC 3.3V No Check IC101, IC103
appear at Pin 2 of IC101,
and related circuit.
and Pin 2 of IC103?

Yes

Does proper DC 2.5V No Check IC104
appear at Pin 3 of IC104? and related circuit.


Yes

Does proper 3.3V and 5.0V
appear at Pin 5, 6 of IC105 and No Check IC105, IC203
Pin 7, 8 of IC105? (Pin 2 (*OFF_SW)
and related circuit.
and Pin 4 (*PANEL_EN) of IC105
must be low level)

Yes

Check IC301.




MO17W* 4-1
4 Troubleshooting
CONFIDENTIAL
4-2-1 No Video [Analog]

Check signal cable and connection.

Does the video signal appear
at Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37 of
9 8 7 6 5
IC401?
Yes

Yes
Is Pin 2(BKLT_EN) of IC203 High? Check TFT-LCD panel and Inverter.


No
Check IC301 and related circuit.
No

Does the input signal appear at Pin 116, 117, 115 and 119 of Yes
Replace IC301.
IC301 (DHS,DVS,DEN,DCLK)? 4 3 2 1


No

Does the analog video signal appear at No
Check PC Signal.
R201, R202, R203? (RED, GREEN, BLUE)

Yes

Does the sync signal
appear at R225 and R224? No Check R225, R224
10 11 and related circuit.
(A_H*V_SYNC, A_V_SYNC) Check PC Signal.

Yes

Does the video signal No
Check IC301 and related circuit.
appear at the output port?




4-2 MO17W*
4 Troubleshooting
CONFIDENTIAL
4-2-2 No Video [Digital]

Check signal cable and connection.


Does the video signal appear
at Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37of
IC401? 9 8 7 6 5

Yes

Yes
Is Pin 2(BKLT_EN) of IC203 High? Check TFT-LCD panel and Inverter.


No
Check IC301 and related circuit.
No

Does the input signal appear at Pin 116, 117, 115 and 119 of Yes
Replace IC301.
IC301 (DHS,DVS,DEN,DCLK)? 4 3 2 1


12

Do signals appear at R216, R217, No
13 14 15 Check PC Signal.
R214,R215 R212, R213, R210, and R211?

Yes

No
Does the video signal appear at the output port? Check IC301 and related circuit.




MO17W* 4-3
4 Troubleshooting
CONFIDENTIAL
WAVEFORMS

1 2 3 4




5 6 7 8




9 10 11 12




13 14 15




4-4 MO17W*
CONFIDENTIAL
5 Exploded View and Parts List

Remark
SA



SNA



SNA

SNA



SA

SNA

SA

SNA

SA

SNA

SA

SNA




MO17W* 5-1
5 Exploded View & Parts List
CONFIDENTIAL
Memo




5-2 MO17W*
CONFIDENTIAL
7 Block Diagram




MO17W* 7-1
7 Block Diagrams
CONFIDENTIAL
Memo




7-2 MO17W*
MO17W*
8 Wiring Diagram




CN1
INVERTER




+14V DC
+14V DC
+14V DC
GND
GND
GND
GND
GND
BL_ON/OFF
GND
BRT_ADJ
GND




9
8
7
6
5
4
3
2
1




12
11
10
9
8
7
6
5
4
3
2
1




NC

GND
GND
GND
GND
GND
GND
BRIGHT




12 +14V DC
11 +14V DC
10 +14V DC
BKLT_EN




1 FRM_GND 22 R_GND
CN102




2 HPD 23 G_VIDEO




CN201
3 DVI_+5V 24 G_GND
4 DVI_SCL 25 B_VIDEO
5 DVI_SDA 26 B_GND
6 DVI_GND 27 DSUB_GND
7 CHK_DVI 28 H_SYNC
8 RXC- 29 V_SYNC
9 RXC+ 30 DSUB_+5V NC 1
10 RXC_GND 31 DSUB_SCL GND 2
11 RX0- 32 DSUB_SDA TXE3+ 3
12 RX0+ 33 DSUB_GND TXE3- 4
13 RX0_GND 34 CHK_DSUB GND 5
14 RX1- 35 AUDIO_DPMS TXECLK+ 6
15 RX1+ 36 P_GND TXECLK- 7
16 RX1_GND 37 P_GND GND 8
17 RX2- 38 P_GND TXE2+ 9
18 RX2+ 39 +14V DC TXE2- 10
MAIN PCB
CN401




19 RX2_GND 40 +14V DC GND 11
20 NC 41 +14V DC TXE1+ 12
21 R_VIDEO TXE1- 13
GND 14
TXE0+ 15
TXE0- 16
GND 17
GND 18
3.3V 19
10 LED_G1 3.3V 20
9 LED_R1
CN601




8 DGND
7 PWR_SW
6 AUTO_KEY
5 EXIT
4 MINUS_KEY
3 PLUS_KEY
2 MENU_KEY
1 DGND
CONFIDENTIAL




8-1
8 Wiring Diagram
CONFIDENTIAL
Memo




8-2 MO17W*
CONFIDENTIAL
9 Schematic Diagrams
9-1 Schematic Diagram
RA303
ER[0:7] 120ohm DER[0:7]




1




2
ER(7) DER(7)

+5V_M DVDD_3.3V AVDD_2.5V DVDD_2.5V AVDD_3.3V




3




4
+5V_M ER(6) DER(6)




5




6
ER(5) DER(5)




*LVDS_EN
ER(4) DER(4)




7




8
PWR_SW
ER(3) DER(3)




1




2
R301




GRN+
RX2+