Samsung LE15V series, LE17KS, LE17LS, LE17KT, LE17JS Service Manual
...
COLOR MONITOR
LE15V*/
LE17LS/LE17LT/LE17KS/
LE17KT/LE17JS/LE17JT
Manual
SERVICE
COLOR 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. PCB Layout
11. Schematic Diagrams
Samsung Electronics Co.,Ltd.
416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Kyungki-Do, Korea, 443-742
Printed in Korea
P/N : BH82-00015J-00
URL : http://itself.sec.samsung.co.kr/
❈ 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.
WARNINGS
1. For continued safety, do not attempt to modify the
circuit board.
2. Disconnect the AC power before servicing.
3. When the chassis is operating, semiconductor
heatsinks are potential shock hazards.
1-1-1 Servicing the High Voltage circuit
and CRT :
1. When servicing the high voltage circuit, remove the
static charge by connecting a 10 kohm resistor in
series with an insulated wire (such as a test probe)
between the chassis and the anode lead.
2. When troubleshooting a monitor with excessively
HV, avoid being unnecessarily close to the monitor.
Do not operate the monitor for longer than is
necessary to locate the cause of excessive voltage.
3. High voltage should always be kept at the rated
value, no higher. Only when high voltage is
excessive are X-rays capable of penetrating the shell
of the CRT, including the lead in glass material.
Operation at high voltages may also cause failure of
the CRT or high voltage circuitry.
4. When the HV regulator is operating properly, there
is no possibility of an X-ray problem. Make sure the
HV does not exceed its specified value and that it is
regulating correctly.
5. The CRT is especially designed to prohibit
X-ray emissions. To ensure continued X-ray
protection, replace the CRT only with one that is
the same or equivalent type as the original.
6. Handle the CRT only when wearing shatterproof
goggles and after completely discharging the high
voltage anode.
7. Do not lift the CRT by the neck.
1-1-2 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).
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.
Figure 1-1. Leakage Current Test Circuit
1-1-3 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.
Components identified by on schematics and parts
lists must be sealed by a soldering iron after
replacement and adjustment.
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
1-1
1 Precautions
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. Servicing precautions are printed on the cabinet,
and should be followed closely.
2. Always unplug the unit’s AC power cord from the
AC power source before attempting to: (a) remove
or reinstall any component or assembly, (b)
disconnect PCB plugs or connectors, (c) connect all
test components in parallel with an electrolytic
capacitor.
3. 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.
4. 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.
5. Check the insulation between the blades of the AC
plug and accessible conductive parts (examples:
metal panels, input terminals and earphone jacks).
6. 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.
7. Never defeat any of the +B voltage interlocks. Do
not apply AC power to the unit (or any of its
assemblies) unless all solid-state heat sinks are
correctly installed.
8. 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.
9. Indicates ESDs on the Schematic Diagram in
this manual.
1 Precautions
1-2 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
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.
1-2 Servicing Precautions
WARNING1: First read the “Safety Precautions” section of this manual. If unforeseen circumstances
create conflict between the servicing precautions and safety precautions, always
follow the safety precautions.
WARNING2: A high voltage VR replaced in the wrong direction may cause excessive X-ray
emissions.
WARNING3: An electrolytic capacitor installed with the wrong polarity might explode.
2 Product Specifications
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
2-1
2 Product Specifications
2-1 LE15V* Specifications
Picture Tube: 15-Inch (38 cm): 13.8-inch (35 cm) viewable,
Full-square flat-face tube, 90˚ Deflection, Semi- tint, Non-glare, Invar shadow mask,
Anti-static silica coating, 0.28 mm Dot pitch
Scanning Frequency Horizontal 30 KHz ~ 55 KHz (Automatic)
Vertical 50 Hz ~ 120 Hz (Automatic)
Display Colors Unlimited colors
Maximum Resolution Horizontal 1024 Dots
Vertical 768 Lines
Input Video Signal Analog, 0.7 Vp-p positive at 75 Ω, internally terminated
Input Sync Signal Separate Sync : TTL level positive/negative
Maximum Pixel Clock rate 65 MHz
Active Display Horizontal : 267 mm ± 4 mm, Vertical : 200 mm ± 4 mm
Input Voltage AC 90 ~ 264 Volts, 60 Hz / 50 Hz ± 3 Hz
Power Consumption 70 Watt (Max)
Dimensions Set (W x D x H) 14.2 x 14.8 x 11.5 Inches (361 x 376 x 292 mm) Stand of stand installed
Package 17.3 x 18.3 x 14.8 Inches (439 x 464 x 376 mm)
Weight (Set/Package) 11.0 kg (24.3 lbs) Stan of stand installed / 12.5 kg (27.6 lbs)
Environmental Considerations Operating Temperature : 32°F ~ 104°F (0°C ~ 40°C)
Humidity : 10 % ~ 80 %
Storage Temperature : –4°F ~ 113°F (–20°C ~ 45°C)
Humidity : 5 % ~ 95 %
• Designs and specifications are subject to change without prior notice.
Item
Description
2-2 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
2-2 LE17LS/LE17LT/LE17KS/LE17KT/LE17JS/LE17JT Specifications
Picture Tube 17-Inch (43 cm): 16-inch (40.6 cm) viewable,
Flat-face, 90˚ Deflection, 0.20 mm (Horizontal) Dot pitch,
Silica coated with anti-electrostatic properties (TCO: Multilayer coating),
Medium-short persistence phosphor
Scanning Frequency Horizontal : 30 kHz ~ 70 kHz , 30kHz ~ 85 kHz
Vertical : 50 Hz ~ 160 Hz
Display Colors Unlimited colors
Maximum Resolution Horizontal : 1280 Dots, 70K / 1600 Dots, 85K
Vertical : 1024 Lines, 70K / 1200 Dots, 85K
Input Video Signal Analog, 0.7 Vp-p positive at 75 Ω, internally terminated
Input Sync Signal Separate Sync: TTL level, positive/negative
Maximum Pixel Clock rate 110 MHz
Active Display Horizontal : 312 mm ± 4 mm, Vertical : 234 mm ± 4 mm
Input Voltage AC 100 - 240C, 60 / 50 Hz 1.2A
Power Consumption 90 Watt (Max) 85K, 80Watt (Max) 70K
Dimensions
Set (W x D x H) 15.8 x 16.1 x 12.7 Inches (401 x 410 x 323 mm) Stand of stand installed
Package 18.3 x 20.4 x 18.1 Inches (464 x 518 x 459 mm)
Weight (Set/Package) 14.3 kg (31.5 lbs) Stand of stand installed / 16.2 kg (35.7 lbs)
Environmental Considerations Operating Temperature : 32°F ~ 104°F (0°C ~ 40°C)
Humidity : 10 % ~ 80 %
Storage Temperature : -4°F ~ 113°F (-20°C ~ 45°C)
Humidity : 5 % ~ 95 %
• Designs and specifications are subject to change without prior notice.
Item
Description
2 Product Specifications
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
2-3
2-3 Pin Assignments
5
15
Figure 2-1. Male Type Figure 2-2. Male Type
Sync
Type
Pin No.
Macintosh
Separate
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Red
Green
Blue
GND
DDC Return
GND-R
GND-G
GND-B
DC 5V
GND-Sync/Self-raster
GND
DDC Data
H-Sync
V-Sync
DDC Clock
GND-R
Red
H/V Sync
Sense 0
Green
GND-G
Sense 1
Reserved
Blue
Sense 2
GND
V-Sync
GND-B
GND
H-Sync
2 Product Specifications
2-4 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
QRS
P
O
Video
Sync
Sync
Horizontal
Vertical
CDE
P
O
B
A
Video
Sync
Sync
Separate Sync
2-4 Timing Chart
This section of the service manual describes the timing that the computer industry recognizes as standard
for computer-generated video signals.
2-4-1 LE15V*
C D
A
O
E
B
P
Video
Sync
Sync
Video
Q R S
A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width
C : Back porch D : Active time Q : Back porch R : Active time
E : Front porch S : Front porch
fH (kHz)
A µsec
B µsec
C µsec
D µsec
E µsec
fV (Hz)
O msec
P msec
Q msec
R msec
S msec
Clock
Frequency
(MHz)
Polarity
H.Sync
V.Sync
Remark
VESA (LE15V* Only)
800/85 Hz
800 x 600
37.500
26.667
2.032
3.810
20.317
0.508
75.000
13.333
0.080
0.427
12.800
0.027
31.500
Negative
Negative
Separate
43.269
23.111
1.556
2.222
17.778
1.556
85.008
11.764
0.671
0.578
11.093
0.023
36.000
Negative
Negative
Separate
53.674
18.631
1.138
2.702
14.222
0.569
85.061
11.756
0.056
0.503
11.179
0.019
56.250
Positive
Positive
Separate
640/75 Hz
640 x 480
640/85 Hz
640 x 480
Table 2-1 Timing Chart
Mode
Timing
2 Product Specifications
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
2-5
QRS
P
O
Video
Sync
Sync
Horizontal
Vertical
CDE
P
O
B
A
Video
Sync
Sync
Separate Sync
C D
A
O
E
B
P
Video
Sync
Sync
Video
Q R S
A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width
C : Back porch D : Active time Q : Back porch R : Active time
E : Front porch S : Front porch
fH (kHz)
A µsec
B µsec
C µsec
D µsec
E µsec
fV (Hz)
O msec
P msec
Q msec
R msec
S msec
Clock
Frequency
(MHz)
Polarity
H.Sync
V.Sync
Remark
VESA
800/85 Hz
800 x 600
1024/85 Hz
1024 x 768
37.500
26.667
2.032
3.810
20.317
0.508
75.000
13.333
0.080
0.427
12.800
0.027
31.500
Negative
Negative
Separate
53.674
18.631
1.138
2.702
14.222
0.569
85.061
11.756
0.056
0.503
11.179
0.019
56.250
Positive
Positive
Separate
68.677
14.561
1.016
2.201
10.836
0.508
84.997
11.765
0.044
0.524
11.183
0.015
94.500
Positive
Positive
Separate
640/75 Hz
640 x 480
Table 2-2 Timing Chart
Mode
Timing
2-4-2 LE17LS/LE17LT/LE17KS/LE17KT
2 Product Specifications
2-6 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
QRS
P
O
Video
Sync
Sync
Horizontal
Vertical
CDE
P
O
B
A
Video
Sync
Sync
Separate Sync
C D
A
O
E
B
P
Video
Sync
Sync
Video
Q R S
A : Line time total B : Horizontal sync width O : Frame time total P : Vertical sync width
C : Back porch D : Active time Q : Back porch R : Active time
E : Front porch S : Front porch
fH (kHz)
A µsec
B µsec
C µsec
D µsec
E µsec
fV (Hz)
O msec
P msec
Q msec
R msec
S msec
Clock
Frequency
(MHz)
Polarity
H.Sync
V.Sync
Remark
VESA
1024/85 Hz
1024 x 768
1280/75 Hz
1280 x 1024
37.500
26.667
2.032
3.810
20.317
0.508
75.000
13.333
0.080
0.427
12.800
0.027
31.500
Negative
Negative
Separate
68.677
14.561
1.016
2.201
10.836
0.508
84.997
11.765
0.044
0.524
11.183
0.015
94.500
Positive
Positive
Separate
79.976
12.504
1.067
1.837
9.481
0.119
75.025
13.329
0.038
0.475
12.804
0.013
135.000
Positive
Positive
Separate
640/75 Hz
640 x 480
Table 2-3 Timing Chart
Mode
Timing
2-4-3 LE17JS/LE17JT
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
3-1
3 Disassembly and Reassembly
This section of the service manual describes the disassembly and reassembly procedures for the
LE15V*/LE17LS/LE17LT/LE17KS/LE17KT/LE17JS/LE17JT TFT-LCD monitors.
WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling
these components.
3-1-1 LE15V*
Cautions:1. Disconnect the monitor from the power source before disassembly.
2. Follow these directions carefully; never use any metal instrument except provided jig to
separate the cabinet.
3. R/Cover opening jig : BH81-00001A
1. Release the snaps on the rear stand and pull
the stand backwards from the monitor and
remove 2 screws from the rear top shield.
2. Insert the openning jig into the grooves at
each side and press until it cilcks and lift up
the rear cover.
3. Disconnect 6 ground from the shield video
and carefully remove the silicon glue on the
CDT socket with a razor.
Caution : CDT socket may be easily
damaged. Please use caution when removing
the silicon glue.
4. High voltage may be present.
Caution : Remove the high voltage cap
from the CDT.
5. Disconnect DY cable, D-COIL cable from the
CDT socket. Using the jig, release the snaps
connecting the front cover and the PCB. Lift
up the bottom to separate the two shields.
!
!
3 Disassembly and Reassembly
3-2 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
6. Disconnect function wire connecter from the
MAIN board. Remove 4 screws from the front
cover.
7. Remove CDT from the front cover.
3-1-2 LE17KS/LE17KT/LE17JS/LE17JT
1. Release the snaps on the rear stand and pull
the stand backwards from the monitor and
remove 2 screws from the rear top shield.
2. Insert the opining jig into the grooves at each
side and press until it cilcks and lift up the
rear cover.
3. Remove 2 screws from the shield and lift up
the shield.
4. Disconnect 3 ground from the shield video
and carefully remove the silicon glue on the
CDT socket with a razor.
Caution : CDT socket may be easily
damaged. Please use caution when remoning
the silicon glue.
!
3 Disassembly and Reassembly
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
3-3
5. High voltage may be present.
Caution : Remove the high voltage cap
from the CDT.
6. Disconnect DY cable, D-COIL cable from the
CDT socket. Using the jig, release the snaps
connecting the front cover and the PCB. Lift
up the bottom to separate the two shields.
7. Disconnect function wire connecter from the
MAIN board. Remove 4 screws from the front
cover.
8. Remove CDT from the front cover.
!
3-1-3 LE17LS/LE17LT
1. Release the snaps on the rear stand and pull
the stand backwards from the monitor and
remove 2 screws from the rear top shield.
2. Insert the opining jig into the grooves at each
side and press until it cilcks and lift up the
rear cover.
3-2 Reassembly
Reassembly procedures are in the reverse order of disassembly procedures.
3 Disassembly and Reassembly
3-4 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
3. Disconnect 3 ground from the shield video
and carefully remove the silicon glue on the
CDT socket with a razor.
Caution : CDT socket may be easily
damaged. Please use caution when remoning
the silicon glue.
4. High voltage may be present.
Caution : Remove the high voltage cap
from the CDT.
5. Disconnect DY cable, D-COIL cable from the
CDT socket. Using the jig, release the snaps
connecting the front cover and the PCB. Lift
up the bottom to separate the two shields.
6. Disconnect function wire connecter from the
MAIN board. Remove 4 screws from the front
cover.
7. Remove CDT from the front cover.
!
!
4-1-1 Before Making Adjustments
4-1-1 (a) ORIENTATION
When servicing, always face the monitor to the
east.
4-1-1 (b) WARM-UP TIME
The monitor must be on for 30 minutes before
starting alignment. Warm-up time is especially
critical in color temperature and white balance
adjustments.
4-1-1 (c) SIGNAL
Analog, 0.7 Vp-p positive at 75 ohm, internal
termination
Sync: Separate
(TTL level negative/positive)
4-1-1 (d) SCANNING FREQUENCY
Horizontal :
30 kHz to 54 kHz (15” Automatic)
Horizontal :
30 kHz to 70 kHz (17” 70kHz Automatic)
Horizontal :
30 kHz to 85 kHz (17” 85kHz Automatic)
Vertical : 50 Hz to 120 Hz (15” Automatic)
Vertical : 50 Hz to 160 Hz (17” Automatic)
Unless otherwise specified, adjust at the
800 x 600 mode (15” 54 kHz/85 Hz),
1024 x 768 mode (17” 68 kHz/85 Hz),
Refer to Table 2-1 on page 2-3.
4-1-2 Required Equipment
The following equipment may be necessary for
adjustment procedures:
4-1-2 (a) DISPLAY CONTROL ADJUSTMENT
1. Non-metallic (–) screwdriver:
1.5, 2.5, 3 mm
2. Non-metallic (+) screwdriver:
1.5, 2.5, 3 mm
3. Digital Multimeter (DMM), or
Digital Voltmeter
4. Signal generator, or
DM200 software
5. Personal computer
4-1-2 (b) COLOR ADJUSTMENTS
1. All equipment listed in 4-1-2 (a), above
2. Color analyzer, or any luminance
measurement equipment.
4-1-3 After Making Adjustments
After finishing all adjustments, test the monitor in
all directions. If, for example, the monitor does not
meet adjustment specifications when facing north,
reposition the monitor to face east and readjust.
This time, try for an adjustment closer to the ideal
setting within the tolerance range. Test the unit
again in all directions. If the monitor again fails to
meet specifications in every direction, contact
your Regional After Service Center for possible
CRT replacement.
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
4-1
4 Alignment and Adjustments
This section of the service manual explains how to make permanent adjustments to the monitor. Directions
are given for adjustments using the monitor Interface Board Ver. 2.0 and software (Softjig).
4-1 Adjustment Conditions
Caution: Changes made without the Softjig are saved only to the user mode settings. As such, the
settings are not permanently stored and may be inadvertently deleted by the user.
4 Alignment and Adjustments
4-2 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
Signal: 800 x 600 (15” 54 kHz/85 Hz)
1024 x 768 (17” 68 kHz/85 Hz)
Display image: Don’t care
Contrast: Minimum
Brightness: Minimum
Limit: 25.0 kV ± 0.3 kV (15”)
26.0 kV ± 0.3 kV (17”)
Measure the high voltage level at the anode cap.
High voltage should be within the limit as above.
4-2-2 CENTER RASTER (17” 85kHz only)
Adjust SW401 so that the back raster comes to the
center when you apply basic mode for 17”.
4-2-3 Centering
Centering means to position the center point of
the display in the middle of the display area.
Horizontal size and position and vertical size and
position control the centering of the display.
Adjust the horizontal size and vertical size to their
optimal settings: 267 mm (H) x 200 mm (V) : (15”)
312 mm (H) x 234 mm (V) : (17”).
Adjust the horizontal position and vertical
position to ≤ 5.0 mm of the center point of the
screen.
|A-B| ≤ 5.0 mm. |C-D| ≤ 5.0 mm.
Figure 4-1. Centering
* In Softjig window, “Geometry” has to be
selected for GD adjustment.
4-2-3 (a) HORIZONTAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz (15”)
68 kHz/85 Hz (17”)
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Click Standard Dump on the right Menu in the
general field.
Use control bar after selecting size B+ in the left
Menu to adjust the horizontal size of the display,
Pattern to 267mm(Tolerance : ±4mm.)(15”)
Pattern to 312mm(Tolerance : ±4mm.)(17”)
Run the All Mode save in the Right Menu.
Caution :
Do not Run the All mode Save at the other
scannig times except for 800 x 600 (54 kHz/85 Hz) ->
15” 1024x768 (68kHz/85Hz) -> 17”.
4-2-3 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz
68 kHz/85 Hz
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Use control bar after selecting “V-SIZE” in left
menu to adjust the vertical size of the display
pattern to 200 mm.(Tolerance: ± 4 mm.) : 15”,
234 mm.(Tolerance: ± 4 mm.) : 17”
4-2-3 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Use control bar after selecting “H-POSITION” in
left menu to center the horizontal image on the
raster.
4-2-3 (d) VERTICAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Use control bar after selecting “V-POSITION” in
left menu to center the vertical image on the
raster.
4-2 Display Control Adjustments
4-2-1 HIGH VOLTAGE
C
A
DISPLAY AREA
EDGE OF BEZEL
B
D
4 Alignment and Adjustments
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
4-3
4-2-4 Linearity
Linearity affects the symmetry of images as they
appear on the screen. Unless each row or column
of blocks in a crosshatch pattern is of equal size,
or within the tolerances shown in Tables 4-2 and
4-3, an image appears distorted, elongated or
squashed.
Table 4-1. Standard Modes Linearity:
800 x 600 / 85Hz (15”)
❈ Preset Mode : 54KHz / 85Hz
Pre-load Mode : Refer to Timing Chart
Table 4-2. Standard Modes Linearity:
1024 x 768 / 85Hz (17”)
Table 4-3. Other Modes Linearity:
above 40 KHz(Hf) : 17”
Off Spec : Under 40 KHz (Hf)
4-2-4 (a) VERTICAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
To adjust the Vertical Linearity, refer to Tables 4-2
and 4-3 for the tolerance range.
Use control bar after selecting “V-LINEARITY
BAL” in left menu to optimize the image.
4-2-5 Trapezoid Adjustment
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Use control bar after selecting “TRAPEZOID” in
left menu to make the image area rectangular.
Figure 4-2. Trapezoid
4-2-6 Pinbalance Adjustment
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Figure 4-3. Pinbalance
Use control bar after selecting “PINBALANCE” in
left menu to optimize the image.
4-2-7 Parallelogram Adjustment
CONDITIONS
Scanning Frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Brightness: Maximum
Contrast: Maximum
Use control bar after selecting “PARALLEL” in
left menu to make the image area rectangular.
Figure 4-4. Parallelogram
| A - B | < 4 mm
A
B
B
A
4 : 3
Horizontal: 20.5~23.5
Vertical : 20.5~23.5
Supported Timing Mode
Each block (14 %)
Difference between
adjacent blocks (5 %)
Horizontal: Less than 1.10 mm
Vertical : Less than 1.10 mm
4 : 3
Horizontal: 20.9~23.1
Vertical : 20.9~23.1
Standard Modes Linearity
Each block (10 %)
Difference between
adjacent blocks (4 %)
Horizontal: Less than 0.88 mm
Vertical : Less than 0.88 mm
D1 D2 D1
4 mm
Preset mode ≤ 4% ≤ 8%
Adjacent Linearity
Entire Linearity
Pre-load mode (48kHz~) ≤ 5% ≤ 14%
4-2-8 Side Pincushion Adjustment
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Crosshatch pattern
Use control bar after selecting “PINCUSHION” in
left menu to straighten the sides of the image area.
4-2-9 Degauss
No adjustments are available for the degaussing
circuit. The degaussing circuit can effectively
function only once every 30 minutes.
4-2-10 To Delete the User Mode Data
To delete the adjustment data from the user
modes, click “@4: USER DELETE” in right menu.
4-2-11 Save the Data
To save the adjustment data for a mode, press
“@3: ALL MODE SAVE” in right menu.
4 Alignment and Adjustments
4-4 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
4-3 Color Adjustments
| C1 |, | C2 | ≤ 2.0 mm, | D1 |, | D2 | ≤ 2.0 mm.
Figure 4-5. Pincushion
C2
C1
D1 D2
CAUTION:Check below condition before color
adjustment
Video signal : Analog 0.7 Vp-p (at 75 Ω)
Sync : TTL level (H, V seperate signal)
* Select “Color” in Softjig menu for color adjustment.
4-3-1 Color Coordinates (Temperature)
Color temperature is a measurement of the
radiant energy transmitted by a color. For
computer monitors, the color temperature refers
to the radiant energy transmitted by white. Color
coordinates are the X and Y coordinates on the
chromaticity diagram of wavelengths for the
visible spectrum.
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: White flat field at
center of display area
Luminance: Maximum
PROCEDURE
Use the directions in sections 4-3-2 through 4-3-3
to adjust the color coordinates for:
9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02
6500K to x = 0.313 ± 0.02, y = 0.329 ± 0.02
4-3-2 Color Adjustments for 9300K
4-3-2 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Back raster pattern
Brightness: Maximum
Contrast: Maximum
1. Select “@1: CHANNEL 1” in right menu to
control the color for 9300K.
2. Adjust the luminance of the back raster to
between 0.5 to 0.7 ft-L using control bar after
selecting “GREEN CUTOFF” in the menu.
3. Use control bar after selecting “BLUE
CUTOFF” in left menu to set the “y”
coordinate to 0.298 ± 0.02.
4. Use control bar after selecting “RED
CUTOFF” in left menu to 0.283 ± 0.02.
* If color values can not be matched to desirable
values, repeat sequences 3 and 4 after
readjusting “GREEN CUTOFF” control.
4 Alignment and Adjustments
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
4-5
4-3-2 (b) WHITE BALANCE ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: White box pattern
Brightness: 0.06ft-L at Back Raster
Pattern Display
Contrast: Maximum
Figure 4-6. White Box Pattern
1. Use control bar after selecting “RED GAIN”,
“GREEN GAIN” and “BLUE GAIN” to adjust
the luminance 47 ± 1 ft-L(15”), 42 ± 1 ft-L(17”)
with the color coordinates ranged for 9300K to
x = 0.283 ± 0.02, y = 0.298 ± 0.02.
4-3-2 (c) ABL ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Full white pattern
Brightness: Maximum
Contrast: Maximum
Figure 4-7. Full White Pattern
1. Check the ABL. If it is not within
specifications, use the ABL controls to adjust.
31 ± 1 ft-L
2. Select “@4: COLOR SAVE” to save the data.
3. Select “@6: ALL COLOR SAVE” to save CH2.
4-3-2 (d) WHITE BALANCE ADJUSTMENT VERIFICATION
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Back raster pattern
Full White Pattern
X-Y Coordinates: x = 0.283 ± 0.02,
y = 0.298 ± 0.02
ABL Luminance Refer to 4-3-2(c)
Brightness: Maximum
Contrast: 5 ft-L, 24 ft-L
1. Check whether the color coordinates of the
back raster satisfy the above spec.
If they do not, return to 4-3-2 (a) and readjust
all settings.
2. Display a full white pattern.
3. Select “Geometry” in softjig menu.
4. Select “@7: 5-ft “ in right menu.
5. Check whether the white coordinates of the
video meet the above coordinates spec.
6. Select “@8: 24-ft “ in right menu.
7. Check whether the white coordinates of the
video satisfies the above spec.
If they do not, return to 4-3-2 (a) and readjust
all settings.
Select “Color” and click “@2: CHANNEL 2”
for color ajdustment for 6500K
Repeat the sequence for 9300K adjustment.
luminance values are the same as 9300K, but
the color coordinats of back raster and white
box are : x = 0.313 ± 0.02 y = 0.329 ± 0.02
4-3-3 MAGIC BRIGHT ADJUSTMENT (MB MODEL ONLY)
CONDITIONS
Scanning frequency: 68 kHz/85 Hz : 17”
Display image: White box pattern
Brightness: 0.06ft-L at Back Raster
Pattern Display
Contrast: Maximum
Figure 4-8. White Box Pattern
1/3H-1/2H
1/3V-1/2V
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
1/3H-1/2H
1/3V-1/2V
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
4 Alignment and Adjustments
4-6 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
1. Use control bar after selecting “RED GAIN”,
“GREEN GAIN” and “BLUE GAIN” to adjust
the luminance 115 ± 1 ft-L (17”) with the color
coordinates ranged for 9300K to x = 0.283 ±
0.02, y = 0.298 ± 0.02.
4-3-4 Color Adjustments for sRGB
4-3-4 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Screen: Back raster pattern
Bright: MAX
Contraster: MAX
1. Select COLOR CHANNEL 4 to control the
color for sRGB.
2. Adjust the luminance of the back raster to
between 0.5 to 0.7 ft-L using the G_CUT
controls.
3. Click on the << or >> boxes next to R_CUT
and B_CUT to adjust the R-Bias to x = 0.312 ±
0.02 and the B-Bias to y = 0.329 ± 0.02.
4-3-4 (b) GAIN (WITHOUT ABL) ADJUSTMENT
1. Bright should be cut off.
2. Save after adjusting : (Color coordinates
x=0.312 ± 0.015, y=0.329 ± 0.015
Brightness : 28 ± 1 F/L) with R, G, B gain key.
Notice : The condition for adjusting is the same as
9300K.
Don't adjust ABL to SRGB Mode
Modify with ABL.
Delete all contents and add the contents
below.
4-3-4 (c) WHITE BALANCE ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: Full white pattern
Brightness: Cut-off
Contrast: Maximum
1. Click on the << or >> boxes next to R_GAIN
and B_GAIN to make the video white.
(For sRGB color adjustment:
x = 0.312 ± 0.02, y = 0.329 ± 0.02.)
2. Select COLOR FACTORY SAVE to save the
data.
Luminance Table 4-4.
4-3-5 Luminance Uniformity Check
Luminance is considered uniform only if the ratio
of lowest to highest brightness areas on the screen
is not less than 7.5:10.
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: White flat field
Brightness: Cut off point at 24 ft-L
Contrast: Maximum
PROCEDURE
Measure luminance at nine points on the display
screen (see figure below).
4-3-6 Focus Adjustment
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: “H” character pattern
Brightness: Cut off point
Contrast: MaximumPROCEDURE
1. Adjust the Focus VR on the FBT to display the
sharpest image possible. (17” only)
2.
Use Locktite to seal the Focus VR in position. (17” only)
4-3-7 Color Purity Adjustment
Color purity is the absence of undesired color.
Conspicuous mislanding (unexpected color in a
uniform field) within the display area shall not be
visible at a distance of 50 cm from the CRT
surface.
Without ABL 28 ft-L
Figure 4-9. Luminance Uniformity Check Locations
CONDITIONS
Orientation: Monitor facing east
Scanning frequency: 54 kHz/85 Hz : 15”
68 kHz/85 Hz : 17”
Display image: White flat field
Luminance: Cut off point at the center
of the display area
Note: Color purity adjustments should only be
attempted by qualified personnel.
PROCEDURE
Use the following procedure to correct minor
color purity problems : 15”
1. Make sure the display is not affected by
external magnetic fields.
2. Make sure the spacing between the PCM
assembly and the CRT stem is 29 mm ± 1 mm.
3. Display a green pattern over the entire display
area.
4. Adjust the purity magnet rings on the PCM
assembly to display a pure green pattern.
(Optimum setting: x = 0.295 ± 0.015, y = 0.594 ± 0.015)
Table 4-5. Color Purity Tolerances
(For 9300K color adjustment: x = 0.283 ± 0.015, y = 0.298 ± 0.015)
5. When you have the PCMs properly adjusted,
carefully glue them together to prevent their
movement during shipping.
Use the following procedure to correct minor
color purity problems : 17”
1. Make sure the display is not affected by
external magnetic fields.
2. Make sure the spacing between the PCM
assembly and the CRT stem is 29 mm ± 1 mm.
3. Display a green pattern over the entire display
area.
4. Adjust the purity magnet rings on the PCM
assembly to display a pure green pattern.
Optimum setting: x = 0.285 ± 0.015,
y = 0.600 ± 0.015
5. Repeat steps 4 and 5 using a red pattern and
then again, using a blue pattern.
Table 4-6. Color Purity Tolerances
(LE17KS/KT Model)
(For 9300K color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02)
Table 4-7. Color Purity Tolerances
(LE17LS/LT Model)
(For 9300K color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02)
6. When you have the PCMs properly adjusted,
carefully glue them together to prevent
movement during shipping.
4 Alignment and Adjustments
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
4-7
Red: x = 0.640 ± 0.015 y = 0.323 ± 0.015
Green: x = 0.295 ± 0.015 y = 0.594 ± 0.015
Blue: x = 0.142 ± 0.015 y = 0.066 ± 0.015
Red: x = 0.645 ± 0.015 y = 0.318 ± 0.015
Green: x = 0.276 ± 0.015 y = 0.596 ± 0.015
Blue: x = 0.145 ± 0.015 y = 0.060 ± 0.015
Red: x = 0.645 ± 0.015 y = 0.321 ± 0.015
Green: x = 0.285 ± 0.015 y = 0.600 ± 0.015
Blue: x = 0.142 ± 0.015 y = 0.057 ± 0.015
Memo
4 Alignment and Adjustments
4-8 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-1
5 Troubleshooting
5-1 Parts Level Troubleshooting
Notes: Check the following circuits.
• No raster appears: Power circuit, Horizontal output circuit.
• High voltage develops but no raster appears: Video output circuits.
• High voltage does not develop: Horizontal output circuits.
5-1-1 No Power Supply
Chirping noise exists?
Check and replace IC601.
Check and replace D601 and FH1
Done
No
Yes
Repeating start?
Check and replace D606.
No
Yes
IC601 Pin 1 waveform is right?
Check and replace IC601.
Yes
No
C627 Voltage is 13 V ± 0.5V?
Check and replace IC201,
IC301, IC401, Q590, Q490,
and 12V regulator circuit.
Yes
Yes
No
Normal operation?
Replace main board.
Verify voltages.
No
WAVEFORMS
1
1
332 Vpp (IC601, #1)
5 Troubleshooting
5-2 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-1-2 DPMS Failure
Make no H/V Sync. (power off mode)
Check signal source
H/V sync. video level.
LED blinks?
Check IC201 Pin 40.
Yes
No
+12 V line off?
Check IC201 Pin 5/Pin 6 and
Q624, Q625 operation.
No
Yes
IC601 Pin 1 output
voltage exists?
Refer to 5-1-1 no power supply.
Done
Yes
No
2
2
332Vpp (IC601, #1)
WAVEFORMS
5 Troubleshooting
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-3
5-1-3 H_Deflection Failure
Does horizontal pluse signal
appear at Pin 26 of IC401?
Check IC401.
Yes
No
Does 110 Vp-p signal appear
at Collector of Q401?
Check Q401.
Yes
No
Check Q590, Q490 and T401.
4
Does PWM output signal appear
at Pin 28 (B_DRV) of IC401?
Check IC401.
Check 12 V line.
Yes
No
Does DC 12V appear at
Pin 29 of IC401?
Yes
No
3
5-1-4 S Correction Failure
S1~S3 signals are correct at each
frequency block?
Check S1 ~ S3 signal.
Check and replace Q451, Q452,
Q453, Q454, Q458, Q457, Q456,
Q455, D451, D452, D453, D454.
Yes
Check and replace IC201.
No
5
3
12 Vpp (IC401, #28)
4
2.00V (IC401, #26)
5
78 Vpp (Q401, Collector)
WAVEFORMS
5 Troubleshooting
5-4 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-1-5 H_Lin. Failure Check and Replace L441 (Fix Type)
5-1-6 Invariable H_Size
IC401 Pin 28 voltage varies with
different B_DRV DAC values?
Q590 gate output duty varies with
different B_DRV DAC values?
Check some parts around Q590,
Pin 14~16 of IC401.
Yes
No
Check and replace IC401.
No
5-1-7 Abnormal H_Size
IC401 Pin 24 output duty
varies with different B+ offset
DAC values?
Q490 collector
waveform is right?
Check and replace Q411,
Q412, Q413, and Q414.
Check components
around D405 and L411.
Yes
Yes
No
Check and replace IC201, IC401.
No
6
6
1300 Vpp (Q490, Collector)
WAVEFORMS
5 Troubleshooting
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-5
5-1-8 Side Pin or Trap Failure
IC401 Pin 24 output exists?
Yes
Check and replace IC401.
Refer to 5-1-7
abnormal H_Size
.
5-1-9 Para. or Pin Balance Failure
IC401 Pin 24 output varies with
different DAC values?
No
Replace IC401.
No
7
5-1-10 Tilt Failure ( Only 17” Function)
IC201 Pin 20 output duty varies
with different DAC values?
Q323 Base output varies with
different DAC values?
Check and replace Q323.
Check and replace Q321 and Q322.
Yes
Yes
No
Check and replace IC201.
No
Check tilt connector connection
Refer to 5-1-7
abnormal H_Size
.
Yes
7
0.44 Vpp (IC401, #24)
WAVEFORMS
5 Troubleshooting
5-6 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-1-11 V Deflection Failure
13V and –10V lines are on?
IC401 Pin 23 output exists?
Check and replace IC401.
Yes
Yes
No
Refer to 5-1-1 no power supply
No
IC301 Pin 6 output exists?
Check and replace
components around IC301.
Yes
No
Check DY connector connection.
8
9
5-1-12 V Size or Position Variation Failure
IC401 Pin 23 output varies with
different DAC values?
Yes
Check and replace IC201 and IC401.
Check and replace IC301.
No
8
2.5 Vpp (IC401, #23)
9
50 Vpp (IC301, #6)
WAVEFORMS
5 Troubleshooting
LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-7
5-1-13 High Voltage Failure
IC401 Pin 28 OSC pulse exists?
Q590 gate driving pulse exists?
Check and replace Q501 and Q502.
Yes
Yes
No
Check and replace IC401
and +12 V line.
No
Q590 drain pulse exists?
Check and replace
Q590, L501 and D501.
Check 50V Line.
Yes
No
Done
10
3
IC102 Pin 22 input exists and
varies with different patterns?
Check and replace IC102.
Input full white pattern to monitor.
Yes
No
T501 Pin 8 output exists?
Check and replace T501.
Yes
No
IC201 Pin 26 output exists and
varies with different patterns?
Check and replace IC201.
Yes
No
Done
Check CN201.
5-1-14 ABL Failure
11
3
12 Vpp (IC401, #28)
10
12 Vpp (Q590, Gate)
11
150 Vpp (Q590, Drain)
WAVEFORMS
5 Troubleshooting
5-8 LE15V*/LE17LS/LE17LT/
LE17KS/LE17KT/LE17JS/LE17JT
5-1-15 Dynamic Focus Failure ( Only 17” Function)
IC401 Pin 32 output is right?
Some parts around Q551 are right?
Replace failed part.
Yes
Yes
No
Replace the IC401.
No
T561 Pin 6 input is right?
Check and replace C443.
Yes
No
T561 Pin 1 output is right?
Replace the T561.
Yes
No
Check the connection between FBT
focus pin and CRT socket PCB.
13
14
12
12
0.58 Vpp (IC401, #32)
13
50.0 V (T561, #6)
14
380 Vpp (T561, #1)
WAVEFORMS
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