Samsung SyncMaster 150MP, SyncMaster ML15NS, SyncMaster ML15AS Service Manual
COLOR MONITOR
SyncMaster 150MP
(ML15NS / ML15AS)
Manual
SERVICE
COLOR MONITOR CONTENTS
CHMenuExitPIP
Source
TVV2V1PC
VOL
SyncMaster 150MP
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
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.
SyncMaster 150MP 1-1
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
!
1-2-1 General Servicing Precautions
1. 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.
2. 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.
3. 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.
1. 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 wriststrap device. To avoid a shock hazard, be sure to
remove the wrist strap before applying power to
the monitor.
2. After removing an ESD-equipped assembly, place it
on a conductive surface such as aluminum foil to
prevent accumulation of an electrostatic charge.
3. Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage
ESDs.
4. Use only a grounded-tip soldering iron to solder or
desolder ESDs.
5. 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.
4. Check the insulation between the blades of the AC
plug and accessible conductive parts (examples:
metal panels, input terminals and earphone jacks).
5. 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 the blades 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.
6. 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.
6. 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.
7. 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.
8. 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.
1 Precautions
1-2 SyncMaster 150MP
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 devices are integrated circuits and some fieldeffect transistors. The following techniques will reduce the incidence of component damage caused by static electricity.
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.
2 Product Specifications
2-1 Specifications
LCD Panel TFT-LCD panel, RGB vertical stripe, normaly white, 15-Inch viewable,
0.297 (H) x 0.297 (V) pixel pitch
Scanning Frequency Horizontal : 30 kHz to 70 kHz (Automatic)
Vertical : 56 Hz to 85 Hz (Automatic)
Display Colors 16,7 Million colors
Maximum Resolution Horizontal : 1024 Pixels
Vertical : 768 Pixels
Input Video Signal Analog, 0.7 Vp-p ± 5% positive at 75 Ω, internally terminated
Input Sync Signal Type: Seperate H/V Sync-on-Green, automatic synchronization
without external switch of sync type
Level: TTL level
Maximum Pixel Clock rate 95 MHz
Active Display 304.1 mm / 228.1 mm
Horizontal/Vertical
AC power voltage & Frequency AC 110 to 240 Volts, 60/ 50 Hz ± 3 Hz
Power Consumption 33 W (max)
Dimensions
Unit (W x D x H) 15.9 x 7.7 x 16.5 Inches (404 x 196 x 419 mm)
Carton (W x D x H) 18.7 x 11.1 x 20.1 Inches (475 x 282 x 510 mm)
Weight (Net/Gross) 1.3 kg
Environmental Considerations Operating Temperature : 50 °F to 104 °F (10 °C to 40 °C)
Humidity : 10 % to 80 %
Storage Temperature : -13 °F to 113 °F (-25 °C to 45 °C)
Humidity : 5 % to 95 %
ML15NS ML15AS
TV System Tunning Frequency Synthesize Frequency Synthesize
Color NTSC PAL
Sound BTSC.A2 STEREO.FM-FM NICAM.A2 STEREO
Antena Input 75Ω Coaxial Cable
– MAX Internal speaker Out::Right => 1W
Left => 1W
– BASS Control Range: -12dB~ + 12dB
– TREBLE Control Range: -12dB~ + 12dB
Sound Characteristic – Line Out: -7dBm (Fixed)
– Headphone Out: RF => 5mW max (400m Vrms)
A/V => 10mW max (580 Vrms), Max Input sound: -9dBm
– Output Frequency (TBD): RF => 80 Hz ~ 15 KHz
A/V => 80 Hz ~ 20 KHz
• SyncMaster 150MP comply with SWEDAC (MPR II) recommendations for reduced electromagnetic fields.
• Designs and specifications are subject to change without prior notice.
SyncMaster 150MP 2-1
Item Description
2 Product Specifications
2-2 SyncMaster 150MP
2-2 Pin Assignments
Sync
Type
Pin No.
15-Pin Signal Cable Connector
Separate Composite Sync-on-green
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Red
Green
Blue
GND
GND (DDC Return)
GND-Red
GND-Green
GND-Blue
No Connection
GND-Sync/Self Test
GND
DDC Data
Horizontal sync
Vertical sync
DDC Clock
Red
Green
Blue
GND
GND (DDC Return)
GND-Red
GND-Green
GND-Blue
No Connection
GND-Sync/Self Test
GND
DDC Data
H/V-Sync
Not Used
DDC Clock
Red
Green + H/V Sync
Blue
GND
GND (DDC Return)
GND-Red
GND-Green
GND-Blue
Not Used
GND-Sync/Self Test
GND
DDC Data
Not Used
Not Used
DDC Clock
2 Product Specifications
SyncMaster 150MP 2-3
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.
Table 2-1. Timing Chart
2 Product Specifications
2-4 SyncMaster 150MP
Table 2-1. Timing Chart
(Continued)
Timing No.
Originator
Mode Name
Resolution (HxV)
12
VESA
800/56Hz
800x600
13
VESA
800/60Hz
800x600
14
VESA
800/72Hz
800x600
18
VESA
800/75Hz
800x600
16
VESA
1024/70Hz
1024x768
HORIZONTAL
Frequency
Total time
Active time
Blank time
Border (L / R)
Data time
Front porch
Sync. width
Back porch
Sync. polarity
35.156kHz
28.444µs
22.222µs
6.222µs
0.000µs
22.222µs
0.667µs
2.000µs
3.556µs
Positive
or Negative
37.879kHz
26.400µs
20.000µs
6.400µs
0.000µs
20.000µs
1.000µs
3.200µs
2.200µs
Positive
48.077kHz
20.800µs
16.000µs
4.800µs
0.000µs
16.000µs
1.120µs
2.400µs
1.280µs
Positive
46.875kHz
21.333µs
16.162µs
5.171µs
0.000µs
16.162µs
0.323µs
1.616µs
3.232µs
Positive
56.476kHz
17.707µs
13.653µs
4.054µs
0.000µs
13.653µs
0.320µs
1.813µs
1.920µs
Negative
VERTICAL
Frequency
Total time
Active time
Blank time
Border (T / B)
Data time
Front porch
Sync. width
Back porch
Sync. polarity
56.250Hz
17.778ms
17.067ms
0.711ms
0.000ms
17.067ms
0.028ms
0.057ms
0.626ms
Positive
or Negative
60.317Hz
16.579ms
15.840ms
0.739ms
0.000ms
15.840ms
0.026ms
0.106ms
0.607ms
Positive
72.188Hz
13.853ms
12.480ms
1.373ms
0.000ms
12.480ms
0.770ms
0.125ms
0.478ms
Positive
75.000Hz
13.333ms
12.800ms
0.533ms
0.000ms
12.800ms
0.021ms
0.064ms
0.448ms
Positive
70.069Hz
14.272ms
13.599ms
0.673ms
0.000ms
13.599ms
0.053ms
0.106ms
0.513ms
Negative
Dot Clock 36.000MHz 40.000MHz 50.000MHz 49.500MHz 75.000MHz
Sync. Type
Scan Type
Separate
N/I
Separate
N/I
Separate
N/I
Separate
N/I
Separate
N/I
2 Product Specifications
SyncMaster 150MP 2-5
Table 2-1. Timing Chart
(Continued)
Timing No.
Originator
Mode Name
Resolution (HxV)
19
VESA
1024/75Hz
1024x768
32
MAC
640/67Hz
640x480
33
MAC
832/75Hz
832x624
Frequency
Total time
Active time
Blank time
Border (L / R)
Data time
Front porch
Sync. width
Back porch
Sync. polarity
60.023kHz
16.660µs
13.003µs
3.657µs
0.000µs
13.003µs
0.203µs
1.219µs
2.235µs
Positive
35.000kHz
28.571µs
21.164µs
7.407µs
0.000µs
21.164µs
2.116µs
2.116µs
3.175µs
Negative
49.726kHz
20.110µs
14.524µs
5.586µs
0.000µs
14.524µs
0.559µs
1.117µs
3.910µs
Negative
VERTICAL
HORIZONTAL
Frequency
Total time
Active time
Blank time
Border (T / B)
Data time
Front porch
Sync. width
Back porch
Sync. polarity
75.029Hz
13.328ms
12.795ms
0.533ms
0.000ms
12.795ms
0.017ms
0.050ms
0.466ms
Positive
66.667Hz
15.000ms
13.714ms
1.286ms
0.000ms
13.714ms
0.086ms
0.086ms
1.114ms
Negative
74.551Hz
13.414ms
12.549ms
0.865ms
0.000ms
12.549ms
0.020ms
0.060ms
0.784ms
Negative
Dot Clock 78.750MHz 30.240MHz 57.284MHz
Sync. Type
Scan Type
*
Separate
N/I
Separate
Composite
Sync.-on-G
N/I
Separate
Composite
Sync.-on-G
N/I
Memo
2 Product Specifications
2-6 SyncMaster 150MP
3-1-1 Removing the Stand
1.Remove 4 screws in the hinge area.
2.Pry it off the back of the monitor.
3.Disconnect Power Cord and Signal Cable.
3-1-2 Main Body Disassembly
1.Remove the 4 screws on the four corner of the
Rear Cover.
2.Remove Rear Cover from the Front Cover.
3.Remove 11 screws on the Shield and remove
the shield.
4.Disconnect Inverter wire, Function PCB wire
and Interface wire.
Remove 4 screws on the Main PCB and
remove 2 screws on the D sub shield.
5.Remove the Main PCB Assembly.
6.Remove 6 screws on the Inverter PCB
Assembly and then remove it
7.Remove 6 screws on the Rear Panel Bracket.
8.Remove the Bracket Assembly from the Front
Cover.
9.Remove 3 screws on the Function PCB from
locking area of Function knob and remove
Function PCB.
10.Remove 4 screws on the Shield of Panel.
11.Remove the Shield.
12.Remove Rear Bracket from Panel.
13.Remove 2 screws between Panel Rear and
Inverter PCB.
14.Remove the Interface wire on the Rear Side of
Panel.
3-1-3 Standard Stand Disassembly
1.Remove 5 screws from the Stand Rear
2.Remove 4 screws from the Stand Bottom.
3.Remove Stand Front from the Stand assembly.
4.Remove 2 screws from the Stand assembly.
5.Remove the Stand Rear from the Stand
assembly.
6.Remove 5 screws on the Vesa Brkt from the
Stand assembly.
7.Remove cover hinge from the Stand assembly.
8.Remove Stand Base from the Stand assembly.
3-1-4 Pivot Multi-media Stand Disassembly
(option)
1.Stand the stand assembly with the base close
to you.
2.Remove the 4 screws on the back cover of the
stand and remove it.
3.Stand the stand assembly upside down.
4.Remove the 4 screws.
5.Disconnect CN805, CN806, CN807, CN808,
CN809, CN812 and F1.
6.Remove the Back Cover of the Stand Front
assembly.
7.Remove 4 screws on the external adaptor and
remove the adaptor.
8.Remove 2 screws between hinge and Stand
Body.
9.Remove the hinge
10.Remove 2 screws on Audio main PCB and
remove it
11.Remove 2 screws on the Audio Function PCB
and remove it.
3-1-5 Angle Pivot Stand Disassembly (option)
1.Remove the cap pivot from the stand
assembly.
2.Remove the 4 screws on the hinge assembly.
3.Remove the 4 screws on the Stand Rear
SyncMaster 150MP 3-1
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
SyncMaster 150MP 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.
4. Remove the Stand Rear from the Stand
assembly.
5. Remove the Stand Front from the Stand
assembly.
6. Remove the Neck Rear from the Stand
assembly.
7. Remove the 4 Rubbers on the four corner of
the Stand Bottom and the 4 screws on the four
corner of the Stand Bottom.
8. Remove the 5 stopper hings from the Bracket
Bottom.
9. Remove the Stand Base from the Stand
Assembly.
3-1-6 Wire frame stand Disassembly (option)
1. Carefully pull the cover hinge.
2. Remove the cover vesa from the Stand
assembly.
3. Remove 4 screws on the assembly Bracket
assembly.
3 Disassembly and Reassembly
3-2 SyncMaster 150MP
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 set to
the ground.
2. Push down the stopper and
slide the lamp unit.
3 Disassembly and Reassembly
SyncMaster 150MP 3-3
3. Please take out the lamp
units from the LCD module.
4. Please fix the new lamp
units on the LCD module :
opposite process 2 and 3
3-3 Reassembly
Reassembly procedures are in the reverse order of Disassembly procedures.
* Replacement of lamp unit should be done at the power off state and rcommended clean bench
condition.
Memo
3 Disassembly and Reassembly
3-4 SyncMaster 150MP
SyncMaster 150MP 4-1
4 Alignments and Adjustments
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.
Memo
4 Alignments and Adjustments
4-2 SyncMaster 150MP
SyncMaster 150MP 5-1
5 Troubleshooting
5-1 No Power
Does proper DC 12 V appear at
DC jack connected to CN102?
Check SMPS PCB and Adapter.
Yes
No
Does proper DC 5 V appear at
Pin 1 of IC103?
Check IC103.
Check IC101.
Yes
No
Does proper DC 2.5 V appear at
Pin 2 of IC100?
Check FT116 and IC100.
Yes
No
Does proper DC 3.3 V appear at
Pin 1 of IC104?
Check IC104.
Yes
No
Loading...