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 VGA2/ VGA3/ 640/75 Hz 640/85 Hz 800/75 Hz 800/85 Hz 1024/60Hz 1024/75Hz...
3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the CN17A*/CN17B*/CN18A* TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly (CN17A* / CN17B*) Cautions:1. Disconnect the monitor from the power source before disassembly. 2.
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3 Disassembly and Reassembly 3-2 Disassembly (CN18A*) 3-2-1 Removing the Stand 6. Disconnect the Function PCB wire (10P) between the Function PCB and the CN303 1. Remove 4 screws on the Stand. connector on the Main PCB. 7. Disconnect 2 Inverter wires between the Panel 3-2-2 Main Body Disassembly and the CN2, CN3 connectors on the Inverter PCB.
4 Alignments and Adjustments This section of the service manual explains how to use the DDC JIG to adjust the black, red, green, and blue levels of the FPD when you replace the AD Board, and how to update the microprocessor when you change the Panel or Lamp(s).
4 Alignments and Adjustments 4-2-1 Main Menu 4-2-2 Sub Menu 4-2-2 (a) Panel Information 4-2-1 (a) Service JIG : DV17 Figure 4-3.Service JIG Menu Figure 4-4. Control JIG Menu Label Definition Label Definition Red max value Shows the red video signal max value Monitor On Time Total hours that the monitor has been actively functioning.
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4 Alignments and Adjustments 4-2-3 Adjustment Procedures 4-2-3 (c) When Replacing the Panel 1. Select the Read Buffer button ( ) to gather the Use the following procedures whenever you current information about this monitor. replace the AD Board, Panel, or one or both of the 2.
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4 Alignments and Adjustments Memo CN17A*/B* CN18A*...
5 Troubleshooting Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1280 x 1024 • H-frequency: 64 kHz • V-frequency: 60 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 5-2 No Video [Analog] Check signal cable and connection. Does the digital video signal appear at the Pin 26,27,28,29,31,32,33,34,36,37,38,39, 41,42,44,45,46,47,49, and 50 of IC302? The output of Pin 1 and 19 of IC500 is High? Check TFT-LCD panel and Inverter. Check IC500 and related circuit.
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5 Troubleshooting 5-2-1 No Video [Digital] Check signal cable and connection. Does the digital video signal appear at the Pin 26,27,28,29,31,32,33,34,36,37,38,39,41, 42,44,45,46,47,49, and 50 of IC302? The output of Pin 1 and 19 of IC500 is High? Check TFT-LCD panel and Inverter. Check IC500 and related circuit.
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5 Troubleshooting 5-3 No OSD WAVEFORMS There is video but no OSD. IC400 #2 Does input signal appear at the Pin 2, 5 and Check IC400 and related circuit. 16 17 18 10 of IC400? CH1 RMS = 2.462V IC400 #5 While pushing a front control button does any pulse appear Check IC400 and related circuit.
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DRAM ADC+PLL ANALOG AD9884/ FMS 9884 Panel I/F Scaller gmZ4S DIGITAL TMDS SiI161 CLOCK CN17B* Back Light Control Setup Data & User I/F Power Sequence Control User Key...