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COLOR MONITOR
SyncMaster 330TFT
SyncMaster 530TFT
SyncMaster 331TFT
SyncMaster 531TFT
Manual
SERVICE
COLOR MONITOR CONTENTS
1. Precautions
2. Reference Information
3. Product Specifications
4. Operating Instructions
5. Disassembly & Reassembly
6. Troubleshooting
7. Exploded View & Parts List
8. Block Diagram
SAMSUNG
EXIT
MENU
- +
9. Electrical Parts List
10. PCB Diagrams
11. Wiring Diagram
12. Schematic Diagrams
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Samsung Electronics Co., Ltd. July 1998 Printed in Korea Code No.: BN68-60017A
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1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings 1. For continued safety, do not attempt to modify the (READING SHOULD NOT BE ABOVE 0.5mA) circuit board. 2. Disconnect the AC power and DC Power Jack LEAKAGE before servicing. DEVICE CURRENT UNDER TESTER TEST 3. When the chassis is operating, semiconductor TEST ALL heatsinks are potential shock hazards. EXPO
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1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. 1-2-1 General Servicing Precautions 1. Always unplug the unitÕs AC power cord fr
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2 Reference Information 2-1 List of Abbreviations, Symbols and Acronyms 2-1-1 Abbreviations Abbreviation Definition Abbreviation Definition AUTO_MENB AUTO ENABLE (NEG.) OSCOUT1 24MHz CLOCK AUTO_SOG SINK ON GREEN ENABLE PANEL_EN +12V_PANEL/+5V_PANEL ENABLE BL_EN LCD PANEL BACK LIGHT ENABLE PC_BLUE_IN BLUE COLOR SIGNAL FROM PC BRIGHT BRIGHTNESS CONTROL PC_GREEN_IN GREEN COLOR SIGNAL FROM PC DAB(7:0) BLUE COLOR DATA (ODD) FROM IC305 PC_HSYNC_IN HSYNC FROM PC DAG(7:0) GREEN COLOR DATA (ODD) FROM
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2 Reference Information 2-1-2 Symbols Hot Ground Cold Ground Provides special safety considerations ! 2-1-2 Acronyms Acronym Definition Acronym Definition ABL Automatic Brightness Limits H/V Horizontal/Vertical AC Alternating Current HV High Voltage ACL Automatic Contrast Limit I/O Input/Output IC Integrated Circuit AFC Automatic Frequency Control ANSI American National Standards Institute LED Light Emitting Diode CMOS Complementary Metal Oxide MAC Macintosh Semiconductor MOFA Mask Outside Frame
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3 Product Specifications 3-1 Specifications Item Description LCD Panel TFT-LCD panel, RGB vertical stripe, normaly white, 15-Inch viewable, 0.297 (H) x 0.297 (V) pixel pitch, 13.3-Inch viewable, 0.264 (H) x 0.264 (V) pixel pitch Scanning Frequency Horizontal : 30 kHz to 61 kHz (Automatic) Vertical : 50 Hz to 75 Hz (Automatic) Display Colors 16.7 Million colors Maximum Resolution Horizontal : 1024 Pixels Vertical : 768 Pixels Input Video Signal Analog, 0.714 Vp-p ± 5% positive at 75 Ω, inte
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3 Product Specifications 3-2 Pin Assignments Sync 15-Pin Signal Cable Connector Type Separate Composite Sync-on-green Pin No. 1 Red Red Red 2 Green Green Green + H/V Sync 3 Blue Blue Blue 4 GND GND GND 5 GND (DDC Return) GND (DDC Return) GND (DDC Return) 6 GND-R GND-R GND-R 7 GND-G GND-G GND-G 8 GND-B GND-B GND-B 9 No Connection No Connection Not Used 10 GND-Sync/Self Test GND-Sync/Self Test GND-Sync/Self Test 11 GND GND GND 12 DDC Data DDC Data DDC Data 13 H-Sync H/V-Sync Not Used 14 V-Sync Not
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3 Product Specifications 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. Table 3-1. Timing Chart Mode IBM VESA VGA1/70 Hz VGA2/70 Hz VGA3/60 Hz 640/72 Hz 640/75 Hz 800/56 Hz 800/60 Hz 640 x 350 720 x 400 640 x 480 640 x 480 640 x 480 800 x 600 800 x 600 Timing fH (kHz) 31.469 31.469 31.469 37.861 37.500 35.156 37.879 A µsec 31.778 31.777 31.778 26.413 26.667 28.444 26.400 B µsec 3.813
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3 Product Specifications Table 3-1. Timing Chart Continued Mode VESA MAC. 800/72 Hz 800/75 Hz 1024/60 Hz 1024/70 Hz 1024/75 Hz 640/67 Hz 832/75 Hz 800 x 600 800 x 600 1024 x 768 1024 x 768 1024 x 768 60 x 480 832 x 624 Timing fH (kHz) 48.077 46.875 48.363 56.476 60.023 35.000 49.726 A µsec 20.800 21.333 20.677 17.707 16.660 28.571 20.110 B µsec 2.400 1.616 2.092 1.813 1.219 2.116 1.117 C µsec 1.280 3.232 2.462 1.920 2.235 3.175 3.910 D µsec 16.000 16.162 15.754 13.653 13.003 21.164 14.524 E µsec
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4 Operating Instructions 4-1 Control and Connectors 4-1-1 SyncMaster 331TFT/531TFT SAMSUNG EXIT MENU - + DC 12V Power Port - + 1 2 Signal Cable Figure 4-2. Rear View G EXIT MENU Table 4-1. Front Panel Controls + - Location Symbol Description 1 Power Button 3 4 5 2 Power Indicator Figure 4-1. Front View and Control EXIT 3 EXIT Button 4 - + Up / Down / + / – Buttons MENU 5 MENU Button SyncMaster 33*TFT/53*TFT 4-1
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4 Operating Instructions 4-1-2 SyncMaster 330TFT/530TFT SAMSUNG EXIT MENU 2 - + Audio in port 1 MIC MIC AUDIO AUDIO OUT OUT IN IN Headphone jack External microphone jack Microphone out port Power port Figure 4-4. Rear View SAMSUNG EXIT MENU Table 4-2. Front Panel Controls + - 4 3 Location Symbol Description ON/OFF 5 VOLUME BASS TREBLE MIC 1 Power Button MIN MAX MIN MAX MIN MAX ON OFF 2 Power Indicator EXIT 6 9 3 Menu Button 78 MENU 4 Exit Button 10 11 5 + Up / Down / + / – Buttons
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4 Operating Instructions 4-2 Microprocessor Controls and Functions This monitor has no Òservice onlyÓ micom 4-2-1 OSD Window controls. Should there be a problem with the The adjustable features described below all use microprocessor, replace the entire circuit board. the on-screen menu system. There are, however, user accessible adjustment features that are described below. 1. Push the ↵ button to open the display the on- screen menu. This monitor has factory preset display settings 2. Use the
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4 Operating Instructions 4-3 Audio Controls Your LCD monitor provides four audio control buttons located on the front of the stand. 4-3-1 Audio Adjustments To access the on/off, volume, bass and treble functions push the appropriate blue control button until it pops out then turn it to the right or left to adjust the function. Effect of Control Movement Function Name Left Right Off On Audio On/Off and Volume Decrease volume Increase volume Bass Decrease Low sounds Increase low sounds Treble De
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5 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the SyncMaster 33*TFT/53*TFT monitors. 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. Disconnect Power Cord and Signal Cable. 5
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5 Disassembly and Reassembly 6. Remove 4 screws on the Rear Panel Bracket. (15Ó : 6 screws) Figure 5-7 Figure 5-5 14. Remove 2 screws between Rear Bracket and Inverter PCB. 7. Remove the Bracket Assembly from the Front Cover. 15. Remove the Interface wire on the Rear Side of Panel. 8. Remove 1 screw on the Power PCB. 9. Remove Function PCB from locking area of 5-1-3 Stand Disassembly Function Knob. 1. Stand the stand assembly with the base close to you. Figure 5-6 10. Remove 4 screws on the Shie
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5 Disassembly and Reassembly 2. Make a little gap between stand assembly and 5. Remove the screw and washer on the base of Rear Cover with a ÔÐÕ screw driver. And pry the stand. Rear Cover off stand assembly with the finger. Figure 5-11 Figure 5-9 6. Remove the Stand Base and Stand Top. 3. Remove the 10 screws from the stand assembly. Figure 5-10 4. Remvoe the hinge, neck front, PCB, signal cable. SyncMaster 33*TFT/53*TFT 5-3
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5 Disassembly and Reassembly 5-2 Replacement Order of Lamp Assemblies (13.3”) 1. Disconnect lamp lead- connector from the inverter. * Replacement of lamp assemblies should be done at the power off state and recommended clean bench condition. 2. Remove a screw which is used to hold a lamp assembly on. 3. Replace lamp assemblies. 4. Assemble new lamp assembly according to the counter order. 5-4 SyncMaster 33*TFT/53*TFT
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5 Disassembly and Reassembly 5-3 Replacement Order of Lamp Assemblies (15”) 1. Disconnect lamp lead- connectors from the inverter. (2EA) * Replacement of lamp assemblies should be done at the power off state and recommended clean bench condition. 2. Remove 2 screws which are used to hold the lamp assemblies on. 3. Replace 2 lamp assemblies. 4. Assemble new lamp assemblies according to the counter order. SyncMaster 33*TFT/53*TFT 5-5
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5 Disassembly and Reassembly 5-4 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures. 5-6 SyncMaster 33*TFT/53*TFT
