SAMSUNG CKE5507LXX Service Manual

COLOR MONITOR

CKE5507L/LM

Manual

SERVICE

COLOR MONITOR CONTENTS

1. Precautions

2. Reference Information

3. Product Specifications

4. Operating Instructions

5. Disassembly & Reassembly

6. Alignment & Adjustments

7. Troubleshooting

8. Exploded View & Parts List

9. Electrical Parts List

10. Block Diagram

11. PCB Diagrams

12. Wiring & Schematic Diagrams

Samsung Electronics Co., Ltd. March 1998 Printed in Korea Code No.: BH68-61035A

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 HV VR and CRT :

1. When servicing the high voltage system, 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. If the HV VR requires adjustment, (a) Replace the VR and adjust the high voltage to the specification. (b) Use a soldering iron to melt the adjustment cap on the HV VR to prevent any movement.

3. 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.

4. 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.

5. 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.

6. 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.

7. Handle the CRT only when wearing shatterproof goggles and after completely discharging the high voltage anode.

8. 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.

Figure1-1. Leakage Current Test Circuit

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.

Components identified by on schematics and parts lists must be sealed by a soldering iron after replacement and adjustment.

CKE5507L/LM 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 CKE5507L/LM

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

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.

CKE5507L/LM 2-1

2 Reference Information

2-1 List of Abbreviations, Symbols and Acronyms

2-1-1 Abbreviations

Abbreviation Definition Abbreviation Definition

ASS’Y Assembly B Blue B+ ADJ B+ Adjustment B-CUT Blue-Cutoff B-GAIN Blue Gain BRIGHT Brightness C R-Composition C-MIC Condenser Microphone CLK Clock CM R-Cement CN Connector CONT Contrast D-SUB D-Subminiature EEP-CLK Electrically Erasable and

Programmable Clock EXT External EXT-MIC External Microphone Freq. Frequency FU Fusible G Green G-CUT Green-Cutoff G-GAIN Green Gain GND Ground H Horizontal H Heater H-DRV Horizontal Drive H-DY Horizontal Deflection Yoke H-FLB Horizontal Flyback H-FV Horizontal-Feedback Voltage H-LIN Horizontal Linearity H-POSI Horizontal Position H-SIZE Horizontal Size H/PHONE Headphone Hz Hertz I-SENSE Current-Sense lb Pound MAX Maximum MIC Microphone MIN Minimum MP C-Metalized Polyester MPP Metal Polypropylene MO R-Metal Oxide

OSC Oscillator P C-Polyester PARA Parabola PARALL Parallelogram PIN-BAL Pincushion Balance PRE-AMP Pre-Amplifier PS1 Power Saving1 (suspend) PS2 Power Saving2 (off) PWR Power R Red R-CUT Red-Cutoff R-GAIN Red Gain RST Reset S-PIN Side Pincushion S-RASTER Self Raster S/W Switch SCAP S Correction Capacitor SPK Speaker SYNC Synchronization T C-Tantalum TR Transistor TRAP Trapezoid U-COM Microprocessor V Vertical V-DY Vertical Deflection Yoke V-FLB Vertical Flyback V-LIN Vertical Linearity V-MUTE Video Mute V-OUT Vertical Output V-PARA Vertical Parabola V-POL V-Polarity V-POSI Vertical Position V-SENSE Voltage-Sense V-SIZE Vertical Size WW R-Wire Wound X-TAL Crystal Ω ohm KΩ 1000 ohm MΩ 1000 KΩ uF microfarad (10-6F) nF nanofarad (10-9F) pF picofarad (10

-12

2 Reference Information

2-2 CKE5507L/LM

Acronym Definition Acronym Definition

ABL Automatic Brightness Limits AC Alternating Current ACL Automatic Contrast Limit AFC Automatic Frequency Control ANSI American National Standards Institute CMOS Complementary Metal Oxide

Semiconductor CRT Cathode Ray Tube DC Direct Current DDC Data Display Channel DF Dynamic Focus DMM Digital Multimeter DPMS Display Power Management Signaling DVM Digital Voltmeter DY Deflection York EEPROM Electrically Erasable and

Programmable Read only Memory ESD Electrostatically Sensitive Device ESF Electronic Static Field FBT Flyback Transformer FET Field Effect Transistor FH Horizontal Frequency FS Fail Safe FV Vertical Frequency GD Geometric Distortion

H/V Horizontal/Vertical HV High Voltage I/O Input/Output IC Integrated Circuit LED Light Emitting Diode MAC Macintosh MOFA Mask Outside Frame Assembly OCP Over Current Protection OP AMP Operational Amplifier OSD On Screen Display P-P Peak to Peak PCB Printed Circuit Board PLL Phase Locked Loop PWM Pulse Width Modulation SMPS Switch Mode Power Supply SVGA Super Video Graphics Array SWEDAC TP Test Point UL Underwriters Laboratories USB Universal Serial Bus VESA Video Electronics Standard

Association VGA Video Graphics Array VR Variable Registor W/B White Balance

2-1-2 Acronyms

2-1-2 Symbols

Can emit X-radiation Hot Ground Cold Ground Electrostatically Sensitive Device (ESD) Provides special safety considerations

CKE5507L/LM 3-1

3 Product Specifications

3-1 Specifications

Picture Tube: 15-Inch (38 cm); 13.8-inch (35 cm) viewable, Full-square flat-face tube, 90° Deflection,

0.28 mm Dot pitch, Semi-tint, Non-glare, Antistatic silica coating, Invar shadow mask, Mini-neck

Scanning Frequency Horizontal : 30 kHz to 61 kHz (Automatic)

Vertical : 50 Hz to 120 Hz (Automatic) Display Colors Unlimited colors Maximum Resolution Horizontal : 1024 Dots

Vertical : 768 Lines Input Video Signal Analog, 0.714 Vp-p positive at 75 Ω, internally terminated Input Sync Signal Separate Sync : TTL level positive/negative

Composite Sync : TTL level positive/negative Maximum Pixel Clock 80 MHz Active Display Horizontal : 267 mm ± 3 mm (4:3 ratio)

Vertical : 200 mm ± 3 mm Input Voltage AC 90 to 264 Volts, 60 Hz/50 Hz ± 3 Hz Power Consumption 85 Watt (max) DC Output DC 12 Volt Dimensions

Unit (W x D x H) 15.9 x 16.6 x 15.6 Inches (403 x 421.4 x 396.4 mm) Carton (W x D x H) 20.4 x 22.6 x 18.9 Inches (518 x 573 x 462 mm)

Weight (Net/Gross) 35.3 lbs (16.0 kg) / 41.9 lbs (19.0 kg) Environmental Considerations Operating Temperature: 32°F to 104°F (0°C to 40°C)

Humidity : 10 % to 80 %

Storage Temperature : -4°F to 113°F (-20°C to 45°C)

Humidity : 5 % to 95 %

• CKE5507L/LM complies with SWEDAC (MPR II) recommendations for reduced electromagnetic fields.

• Designs and specifications are subject to change without prior notice.

Item Description

3 Product Specifications

3-2 CKE5507L/LM

3-2 Pin Assignments

Sync Type

Pin No.

15-Pin Signal Cable Connector (Figure 3-1)

Cable Adapter (Figure 3-2)

Macintosh

Separate Composite

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 Reserved GND-Sync/Self-raster GND DDC Data H-Sync V-Sync DDC Clock

Red Green Blue GND DDC Return GND-R GND-G GND-B Reserved GND-Sync/Self-raster GND DDC Data H/V-Sync Not Used 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

Figure 3-1. Male Type Figure 3-2. Male Type

3 Product Specifications

CKE5507L/LM 3-3

3-3 Timing Chart

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

QRS

Video

Sync

Horizontal

Vertical

CDE

Video

Sync

Separate Sync

C D

Video

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

VIDEO

Horizontal

Vertical

H/V Composite Sync

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

IBM VESA

800/85 Hz 800 x 600

1024/75 Hz 1024 x 768

640/60 Hz 640 x 480

720/70 Hz

720 x 400

31.469

31.777

3.813

1.907

25.422

0.636

70.087

14.268

0.064

1.080

12.711

0.413

28.322

Negative

Positive

Separate

31.469

31.778

3.813

1.907

25.422

0.636

59.940

16.683

0.064

1.048

15.253

0.318

25.175

Negative Negative Separate

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

0.069

0.578

11.093

0.023

36.000

Negative Negative Separate

46.875

21.333

1.616

3.232

16.162

0.323

75.000

13.333

0.064

0.448

12.800

0.021

49.500

Positive Positive

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

60.023

16.660

13.003

3.658

13.206

3.454

75.029

13.328

12.795

0.533

12.812

0.516

78.750

Positive Positive

Separate

800/75 Hz 800 x 600

640/75 Hz 640 x 480

640/85 Hz 640 x 480

Table 2-1. Timing Chart

Mode

Timing

Memo

3 Product Specifications

3-4 CKE5507L/LM

4-1 Front View and Controls

CKE5507L/LM 4-1

4 Opearating Instructions

151416

6 7 8

Figure 4-1. Front Control Panel

Location Symbol Description

1 Power Button

Power Indicator LED (Dual Color) Contrast Control Brightness Control Horizontal Position Button

Trapezoid Button

Degauss Button

Side Pincushion Button Adjustment Buttons Parallelogram Pinbalance Button Moire ON/OFF

Vertical Size Button

Vertical Position Button Horizontal Size Button

Recall Button

3 4

9 10 11 12 13 14 15 16

Table 4-1. Front Panel Controls

+ + +

Note 1:When used with a computer equipped

with VESA DPMS functions, this monitor is EPA Energy Star compliant and NUTEK compliant.

Table 4-2. Display Power Management Signaling (DPMS)

4 Operating Instructions

4-2 CKE5507L/LM

State

Items

Normal

Operation

Horizontal Sync Vertical Sync Video

Power Indicator

Power Consumption/hr

Active Active Active

Green Amber

Alternating

Amber/Green

Blinking

Amber

Blinking

85 W (max.)

75 W

(nominal)

Less than

15 W

70 W (max.)

66.5 W

Less than

8 W

Inactive

Active

Blanked

Active Inactive Blanked

Power saving function EPA/NUTEK

Stand-By

Mode

Suspend Mode

Position A

Power Off Mode

Position B

Inactive Inactive Blanked

5-1-1 Cabinet Disassembly

1. With a pad beneath it, stand the monitor on its front with the screen facing downward and the base closest to you. Make sure nothing will damage the screen.

2. Press in the tab on the Cabinet Bottom and pull the Tilt and Swivel Base upward to remove it.

3. Working from the back of the monitor, remove the four screws and remove the Rear Cover.

4. Using pinch-nose pliers or long-nose pliers, carefully disconnect the Anode Cap from the CRT.

Caution: Do not touch the anode contact on

the CRT.

5-1-2 Removing the CRT Socket PCB

1. Complete all previous steps.

2. Disconnect CRT and Main PCB ground wires on CRT Socket PCB and Shield Cover.

3. Desolder the 5 tabs on the underside of the CRT Socket PCB shield and remove the CRT Socket PCB Shield.

4. Using a knife, cut through the silicone bond and lift off the CRT Socket PCB.

5. Disconnect connectors CN101 and 3 ground wires on the CRT Socket PCB.

5-1-3 Removing the Main PCB

1. Complete all previous steps.

2. Disconnect Degaussing Coil at the CN601 connector on the Main PCB.

3. Disconnect all easily accessible ground wires on the Main PCB and Chassis Bottom.

4. Disconnect the DY connector between the DY and the CN301, CN302, CN502 and CN503 connector on the Main PCB.

5. Remove the screws on the back and along each side of the Chassis Bottom.

6. Carefully lift the Main PCB Ass’y.

7. Remove all other ground wires.

5-1-4 CRT Ass’y Disassembly

1. Complete all previous steps.

2. Straighten the Degaussing Coil Assembly coated metal ties and lift Coil Ass’y from the CRT.

3. Remove the four corner screws and lift the CRT up and away from the Front Cover Assembly and place it on a padded surface.

Caution: Do not lift the CRT by the neck.

If you will be returning this CRT to the monitor, be sure to place the CRT face downward on a protective pad.

CKE5507L/LM 5-1

5 Disassembly and Reassembly

This section of the service manual describes the disassembly and reassembly procedures for the CKE5507L/LM monitor.

WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling

these components.

5-1 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.

5-2-1 Replacing the CRT

1. Loop the CRT Ground Ass’y around the back of the CRT and under the four corner metal ears. Position last the corner with the spring.

2. With the Front Cover Assembly lying face down on a protective pad, position the CRT so that the corner metal ears fit properly in the Front Cover Assembly.

3. Secure the CRT ground Ass’y and CRT at each of the four corners with the CRT screws.

4. Replace the Degaussing Coil Assembly and wrap the Coil with the ties to hold the Coil in place.

5-2-2 Replacing the Main PCB

1. Stand the monitor on its front with the screen facing downward.

2. Slide the Main PCB into the Chassis Bottom and replace the wires and screws on the Chassis Bottom.

3. Replace connector CN203 on the Main PCB.

4. Position the Main PCB Ass’y in the front Cabinet and secure it with the screws.

5. Replace both side CRT ground wires on the Chassis Bottom.

6. Replace the Degaussing Coil at the CN601 connector on the Main PCB.

7. Replace the DY connector at the CN301, CN302, CN502 and CN503 connector on the Main PCB.

8. Replace all easily accessible ground wires on the Main PCB and Chassis Bottom.

9. Replace the Anode Cap.

5-2-3 Replacing the CRT Socket PCB

1. Lock the Focus (G3) wire on the CRT Socket and reconnect the Screen (G2) wire on the CRT Socket PCB.

2. Reconnect the CRT Socket on the CRT pins and apply silicon bond at the Plug/Socket Junction.

3. Replace the CRT and Main PCB ground wires on CRT Socket PCB and Shield Cover.

4. Reconnect the connectors CN202 to the Main PCB.

5. Solder the 5 tabs on the underside of the CRT Socket Shield.

5-2-4 Cabinet Reassembly

1. Complete all previous steps.

2. Position the Rear Cover marking sure the tabs along the front edge are properly snapped in place. Replace the four screws.

3. Snap the Tilt and Swivel Base into position.

4. Set the monitor on its Base and make sure that the CRT faceplate was not scratched or otherwise damaged.

5 Disassembly and Reassembly

5-2 CKE5507L/LM

5-2 Reassembly

With the CRT facing downward on a protective pad, use the steps that follow to reassemble the monitor.

6-1-1 Before Making Adjustments

6-1-1 (a) ORIENTATION

When servicing, always face the monitor to the east.

6-1-1 (b) MAGNETIC FIELDS

Whenever possible, use magnetic field isolation equipment such as a Helmholtz field to surround the monitor. If a Helmholtz field is not available, frequently degauss the unit under test.

Caution: Other electrical equipment may cause

external magnetic fields which may interfere with monitor performance.

Use an external degaussing coil to limit magnetic build up on the monitor. If an external degaussing coil is not available, use the internal degaussing circuit. However, do not use the internal degaussing circuit more than once per 30 minutes.

6-1-1 (c) WARM-UP TIME

The monitor must be on for 30 minutes before starting alignment procedures. Warm-up time is especially critical in Color Temperature and White Balance adjustments.

6-1-1 (d) SIGNAL

Analog, 0.714 Vp-p positive at 75 ohm, internal termination Sync: Separate (TTL level negative/positive)

6-1-1 (e) SCANNING FREQUENCY

Horizontal: 30 kHz to 61 kHz (automatic) Vertical: 50 Hz to 120 Hz (automatic)

Unless otherwise specified, adjust at the 800 x 600 mode (H : 53.7 kHz, V: 85 Hz) signals.

Refer to Table on page 3-3.

6-1-1 (f) CENTER RASTER

Adjust SW401 so that the back raster comes to the center when you apply a signal of 60 kHz/75 Hz.

6-1-1 (g) MINIMUM SIZE ADJUSTMENT

Scanning frequency: 60 kHz/75 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum

Check the horizontal size 252 mm ± 2 mm by using VR401.

6-1-1 (h) BRIGHTNESS AND CONTRAST

Unless otherwise specified, adjust External VRs. Brightness: Maximum (turn knob fully clockwise)

Contrast: Maximum (turn knob fully clockwise)

CKE5507L/LM 6-1

6 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).

6-1 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.

6-1-2 Required Equipment

The following equipment may be necessary for adjustment procedures:

6-1-2 (a) DISPLAY CONTROL ADJUSTMENT

1. Non-metallic (–) screwdriver: 1.5 mm Non-metallic (–) screwdriver: 3 mm

2. Philips (+) screwdriver: 1.5 mm

3. Non-metallic hexkey: 2.5 mm

4. Digital Multimeter (DMM), or Digital Voltmeter (DVM)

5. Signal generator, or Computer with a video board that uses the ET-4000 chipset (strongly recommended if using Samsung DM 200 software) and that displays: 800 x 600 @ 85 Hz, or 1024 x 768 @ 75 Hz (minimum).

6. Required software: Softjig.exe from Samsung, Samsung DM200, or DisplayMate for Windows from Sonera Technologies

7. Interface Board Ver. 2.0 Code No. BH81-90001K

8. Parallel communications cable (25-pin to 25-pin); Code No. BH81-90001H

9. Signal cable (15-pin to 15-pin cable with additional 3-pin connector); Code No. BH81-90001J

10. 5 V DC adapter, not supplied

Note: SoftJig Assembly (includes items 8, 9 and 10

Code No. BH81-90001L

6-1-2 (b) COLOR ADJUSTMENTS

1. All equipment listed in 6-1-2 (a), above

2. Color analyzer, or any luminance measurement equipment

6-1-3 Connecting the SoftJig

Connect the monitor to the signal generator and/ or PC as illustrated in Figures 6-1 and 6-2.

Note: The signal cable connector which includes

the 3-wire cable must connect to the monitor. If you use Setup 2 (PC only, no signal generator) you can only make adjustments to the signal timing available on that computer system. To make corrections to all factory timings requires the use of an additional signal generator.

6-1-4 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.

6 Alignment and Adjustments

6-2 CKE5507L/LM

MONITOR

INTERFACE BOARD VER. 2.0

SIGNAL GENERATOR

7 PIN MINI DIN CONNECTOR

SIGNAL CABLE

5V DC ADAPTOR

PARALLEL CABLE

Figure 6-1. Setup 1, With Signal Generator

MONITOR

INTERFACE BOARD VER. 2.0

7 PIN MINI DIN CONNECTOR

SIGNAL CABLE

PARALLEL CABLE

D-SUB CONNECTOR

5V DC ADAPTOR

Figure 6-2. Setup 2, Without Signal Generator

6-2-1 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)

Adjust the horizontal position and vertical position to within 4.0 mm of the center point of the screen.

l A - B l ≤ 4.0 mm. l C - D l ≤ 4.0 mm.

6-2-1 (a) HORIZONTAL SIZE ADJUSTMENT CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum

Adjust the horizontal size of the display pattern to 267 mm. (Tolerance ± 3 mm.)

6-2-1 (b) VERTICAL SIZE ADJUSTMENT CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern Brightness: Maximum Contrast: Maximum

Adjust the vertical size of the display pattern to 200 mm. (Tolerance: ± 3 mm.)

6-2-1 (c) HORIZONTAL POSITION ADJUSTMENT CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern

PROCEDURE

Center the test pattern on the raster.

6-2-1 (d) VERTICAL POSITION ADJUSTMENT CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern

Center the test pattern on the raster.

6-2-2 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 6-1 and 6-2, an image appears distorted, elongated or squashed.

The formular of linearity (%)

Table 5-1. Standard Modes Linearity: 800x600/85Hz

Table 5-2. Other Modes Linearity: VGA, SVGA, XGA,

MAC, etc.

6-2-3 Trapezoid Adjustment

CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern

Make the the test pattern rectangular.

Figure 6-4. Trapezoid

6 Alignment and Adjustments

CKE5507L/LM 6-3

6-2 Display Control Adjustments

DISPLAY AREA

EDGE OF BEZEL

Figure 6-3. Centering

Supported Timing Mode

Each block (14 %)

Difference between

adjacent blocks (5 %)

Standard Timing Modes

Each block (10 %)

Difference between

adjacent blocks (4 %)

2 x (Max – Min)

= x 100

Max + Min

| A - B | < 4 mm

6-2-4 Parallelogram Adjustment

CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern

To activate the Parallelogram Adjustment function, push both the Horizontal Position and Vertical Position buttons and hold them in for longer than 3 seconds, or until the power indicator LED changes from amber to green and back to amber.

Use the Increase (+) and Decrease (–) buttons to correct the display shape.

Figure 6-5. Parallelogram

6-2-5 Side Pincushion Adjustment

CONDITIONS

Scanning frequency: 53.7 kHz/85 Hz Display image: Crosshatch pattern

After pushing the Side Pincushion button once, push the Increase (+) and Decrease (–) buttons to straighten the sides of the test pattern.

6-2-6 CRT Tilt Adjustment

TILT ADJUSTMENT

To activate the tilt adjustment, push both the vertical position and horizontal size buttons and hold then in for longer than 3 seconds, or until the power indicator LED changes from amber to green and back to amber.

Use the Increase (+) and Decrease (–) buttons to correct the display shape.

6-2-7 Pin Balance Adjustments

To activate the pin balacne function, push both the horizontal position and horizontal size buttons and hold then in for longer than 3 seconds, or until the power indicator LED changes from amber to green and back to amber.

Use the Increase (+) and Decrease (–) buttons to correct the display shape.

6-2-8 Degauss

Push the contrast and brightness buttons simultaneously. The degaussing circuit can effectively function only once per 30 minutes. If available, use an external degaussing coil during servicing.

WARNING: Do Not hold the Degauss button

down for longer than 3 seconds. If you do, it resets all of the data in the user memory area. If this occurs, you must remake the user adjustments.

6-2-9 Delete User Mode Data

To delete the picture data from the user modes, push the Degauss button for 5 or more seconds.

6-2-10 Recall

To delete the picture data from current user mode, push the Recall button.

6 Alignment and Adjustments

6-4 CKE5507L/LM

2.5 mm

| C1 |, | C2 | ≤ 1.5 mm, | D1 |, | D2 | ≤ 1.5 mm.

Figure 6-6. Pincushion

FRONT BEZEL

BACK RASTER

Figure 6-7. CRT Tilt Adjustment

D2D1

Note: To make color adjustments you must have a

color analyzer and one of the following configurations:

1. Signal Generator or

2. Computer with Samsung DM 200 software or DisplayMate for Windows software from Sonera Technologies

Before making adjustments, check that the video signals are as follows:

Video : Analog, 0.714 Vp-p (at 75 Ω termination) Sync : Separate TTL level

Unless otherwise specified, use 800 x 600 mode signal (53.7 kHz/85 Hz) for adjustments.

6-3-1 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: 53.7 kHz/85 Hz Display image: White flat field at

center of display area

Luminance: Maximum

PROCEDURE

Using the directions in sections 6-3-2 through 6-3-5, adjust the Color Coordinates for 9300K to x = 0.283 ± 0.02 and y = 0.298 ± 0.02

6-3-2 Back Raster Color Adjustment

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: Back raster pattern Brightness: Maximum Contrast: Maximum

PROCEDURE

1. Adjust the Screen VR on the FBT so that the brightness of the Back Raster is 0.3 to 0.5 ft-L (typically 0.4 ft-L).

2. Adjust VR102R (R-Bias) and VR102B (B-Bias) so Back Raster color is white. (x = 0.283 ± 0.02 and y = 0.298 ± 0.02)

6-3-3 Video Gain Adjustment

Figure 6-8. Green Box Pattern

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: Green box pattern

within range for which the ABL circuit is not active (1/3 to 1/2H and

1/3 to 1/2V). Brightness: Maximum Contrast: Maximum

PROCEDURE

1. Adjust VR102 (G-Gain) so that the brightness

of the green gain is 40 ± 1 ft-L (typically 40 ft-L).

6-3-4 White Balance Adjustment

Figure 6-9. Full White Pattern

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: Full white pattern Brightness: Maximum Contrast: Maximum

PROCEDURE

1. Display the full white pattern.

2. Adjust VR101 (R-Gain) and VR103 (B-Gain) so

that the video is white. (x = 0.283 ± 0.02 and y = 0.298 ± 0.02)

6 Alignment and Adjustments

CKE5507L/LM 6-5

6-3 Color Adjustments

1/3H-1/2H

1/3V-1/2V

FRONT BEZEL OPENING BACK RASTER

GREEN WINDOW

FRONT BEZEL OPENING BACK RASTER

WHITE WINDOW

6-3-5 White Balance Fine Adjustment

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: Full white pattern X-Y coordinates: x = 0.283 ± 0.02

y = 0.298 ± 0.02

PROCEDURE

1. Adjust the Contrast control so that the brightness of the video is about 5 ft-L.

2. Check whether the white coordinates of the video meet the specification above. If they do not, adjust them so that they do.

3. Adjust the Contrast to maximum luminance.

4. Check whether the white coordinates still meet the specification above. If they do not, adjust them so that they do.

6-3-6 ABL Point Adjustment

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: Full white pattern Brightness: Maximum Contrast: Maximum

PROCEDURE

Adjust VR501 (ACL) so that the brightness level is 40 ± 1 ft-L.

6-3-7 Focus Adjustment

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: “H” character pattern Brightness: Maximum Contrast: Maximum

PROCEDURE

1. Adjust the Focus VR on the FBT to display the sharpest image possible.

2. Use Locktite to seal the Focus VR in position.

6-3-8 Luminance Uniformity Check

CONDITIONS

Measurement instrument: Color analyzer Scanning frequency: 53.7 kHz/85 Hz Display image: White flat field Brightness: Cut off point at

30~40 ft-L

PROCEDURE

Measure luminance at nine points on the display screen: top left corner, top center, top right corner, center row left side, center, center row right side, bottom left corner, bottom center, and bottom right corner.

6-3-9 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 50cm from the CRT surface.

CONDITIONS

Orientation: Monitor facing east Scanning frequency: 53.7 kHz/85 Hz Display image: White flat field Luminance: Cutoff point at the center

of the display area

Caution: Color purity adjustments should only

be attempted by qualified personnel.

PROCEDURE

For trained and experienced service technicians only.

Use the following procedure to correct minor color purity problems:

1. Make sure the display is not affected by external magnetic fields. Use an external degaussing coil to neutralize magnetic fields which may be affecting color purity.

2. Very carefully break the glue seal between the 2-pole purity convergence magnets (PCM), the band and the spacer (see Figure 6-9).

3. Make sure the spacing between the PCM assembly and the CRT stem is 22.5mm ± 1mm.

4. Display a red pattern over the entire display area.

5. Adjust the Purity Magnet Rings on the PCM assembly to display a pure green pattern. (Optimal setting: x = 0.310 ± 0.015, y = 0.592 ± 0.015)

6. Repeat steps 4 and 5 using a red pattern and then again, using a blue pattern.

Table 6-3. Color Purity Tolerances

(For 9300K white color adjustment: x = 0.283 ± 0.02, y = 0.298 ± 0.02)

7. When you have the PCMs properly adjusted, carefully gule them together with Locktite to prevent their movement during shipping.

6 Alignment and Adjustments

6-6 CKE5507L/LM

Red: x = 0.625 ± 0.015 y = 0.340 ± 0.015 Green: x = 0.310 ± 0.015 y = 0.592 ± 0.015 Blue: x = 0.150 ±0.015 y = 0.063 ±0.015

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