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 For continued safety, do not attempt to modify the (READING SHOULD circuit board. NOT BE ABOVE 0.5mA) Disconnect the AC power and DC power jack before servicing.
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.
2 Product Specifications 2-2 Pin Assignments Sync 15-Pin D-Sub Signal Cable Connector Type Separate Composite Sync-on-green Pin No. Green Green Green + H/V Sync. Blue Blue Blue DDC Return (GND) DDC Return (GND) DDC Return (GND) GND-R GND-R GND-R GND-G GND-G GND-G GND-B...
2 Product Specifications 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 Mode VESA VESA (GY17MS*) VGA2/ VGA3/ 640/75 Hz 800/60 Hz 800/75 Hz 1024/60 Hz 1024/75 Hz...
3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the GY15MS*/GY17MS* TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly. 2.
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3 Disassembly and Reassembly 6. Remove 5 screws from the main board and lift up main board. 7. Remove cover front from the panel and remove 4 screws from the shield panel. 8. Lift up shield from the panel. 3-1-2 GY17MS* 1.
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3 Disassembly and Reassembly 4. Disconnect function cable and audio board. 5. Remove cover front from the panel and remove 4 screws from the shield panel. 6. Lift up the shield and disconnect LVDS cable from the main board and remove 6 screws from the main board.
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3 Disassembly and Reassembly 3-2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. GY15MS*/GY17MS*...
4 Alignments and Adjustments This section of the service manual explains how to use the RS232 JIG. This function is needed for AD board change and program memory (IC110) change. 4-1 Required Equipment The following equipment is necessary for adjusting the monitor: •...
4 Alignments and Adjustments 4-6 Service Function Spec. 4-6-1 How to Display Service Function OSD 1. The value for brightness and contrast should be changed to zero. 2. Within 5 seconds, press the exit key. 3. Service function OSD will be displayed. If you want to disable the service function OSD, you will have to power off.
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4 Alignments and Adjustments 4-6-3 How to Control Service Function OSD •After change the panel or lamp, you must reset service function OSD. •The case of panel change After changeing the panel, press the menu key within 5 seconds,. Then, panel Ch. No increases one step and the panel time information is reset to zero. Simultaneously, other information is reset to zero (Upper/Lower lamp, Panel cycle).
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4 Alignments and Adjustments Memo GY15MS*/GY17MS*...
5-1 Troubleshooting (GY15MS*) Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1024 x 768 • H-frequency: 61 kHz • V-frequency: 75 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3. Check the following circuits. •...
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5 Troubleshooting 5-1-2 No Video [Analog] Check signal cable and connection. Does the video signal appear at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37 of IC302? Is Pin 4 (BLIGHT_EN) of CN102 high? Check TFT-LCD panel and inverter. Check IC402 and related circuit.
5 Troubleshooting 5-2 Troubleshooting (GY17MS*) Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1280 x 1024 • H-frequency: 81 kHz • V-frequency: 75 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3.
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5 Troubleshooting 5-2-2 No Video [Analog] Check signal cable and connection. Does the video signal appear at the Pin 48, 47, 46, 45, 42, 41, 40, 39, 38, and 37 of IC301? Is Pin 4 (BLIGHT_EN) of CN302 high? Check TFT-LCD panel and inverter. Check IC201 and related circuit.
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6 Exploded View and Parts List You can search for updated part codes through CMS web site. URL : http://ecms. samsungelectronics. com/ 6-1 GY15MS* GY15MS*/GY17MS*...
7 Electrical Parts List You can search for updated part codes through CMS web site. URL : http://ecms. samsungelectronics. com/ 7-1-1 GY15MS* Main PCB Parts Loc. No. Code No. Description Specification Remarks BN94-00446G ASSY PCB MAIN-SX GY15MS C120 2401-001363 C-AL 470uF,20%,16V,GP,TP,10x12.5,5 C214 2409-001044...
9 Wiring Diagram 9-1 GY15MS* INVERTER CN401 IN L CN202 +14V DC +14V DC IN R +14V DC +14V DC OUTL +14V DC +14V DC CN102 OUTR BL_ON/OFF BKLT_EN BRT_ADJ BRIGHT CN103 CN101 CN103 GY15MS*/GY17MS*...
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9 Wiring Diagram 9-2 GY17MS* INVERTER CN301 IN L CN202 +14V DC +14V DC IN R +14V DC +14V DC OUTL +14V DC +14V DC CN302 OUTR BL_ON/OFF BKLT_EN BRT_ADJ BRIGHT CN103 CN101 CN303 GY15MS*/GY17MS*...