CONFIDENTIAL 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.
CONFIDENTIAL 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.
CONFIDENTIAL 2 Product Specifications 2-2 Pin Assignments 2-2-1 D-SUB 2-2-2 DVD, DTV Separate RCA Green Green Pb (Cb) Blue RCA Blue GND (DDC Return) GND-Red Pr (Cr) GND-Green RCA Red GND-Blue No Connection Audio L GND-Sync./Self Test RCA White DDC Data H-Sync.
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CONFIDENTIAL 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. 2-3-1 LCD Panel Mode : 1 mode µs µs µs µs µs µs µs µs NK15N*/NK17N*...
CONFIDENTIAL 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the NK15N*/NK17N* monitor. 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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CONFIDENTIAL 3 Disassembly and Reassembly 2. Push down the stopper and slide the lamp unit. 3. Please take out the lamp units from the LCD module. 4. Please fix the new lamp units on the LCD module : opposite process 2 and 3 Replacement of lamp unit should be done at the power off state and recommended clean bench condition.
CONFIDENTIAL 4 Alignments and Adjustments 4-1 General Alignment Instuction 1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. 2. Use the specified test equipment or its equivalent. 3.
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CONFIDENTIAL 4 Alignments and Adjustments 4-2 Factory Mode Adjustments 4-2-1 Entering Factory Mode 1. To enter “Service Mode” Press the remote -control keys in this sequence : - If you do not have Factory remote - control - If you have Factory remote - control 4-2-2 Factory Mode Tree NK15N*/NK17N*...
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CONFIDENTIAL 4 Alignments and Adjustments NK15N*/NK17N*...
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CONFIDENTIAL 4 Alignments and Adjustments Memo NK15N*/NK17N*...
CONFIDENTIAL 5 Troubleshooting 5-1 No Power WAVEFORMS Does proper DC 14V appear at DC Check SMPS PCB and Adapter. jack connected to CN801? IC811 #2 Does proper DC 3.3V_A Check IC811. appear at FT852? Does proper DC 2.5V_A Check IC802. appear at Pin 3 of IC802? IC805 #1 Does proper DC 3.3V_B...
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CONFIDENTIAL 5 Troubleshooting 5-2 No Video (PC Signal) Power indicator is green. Does the signal appear at C491, C489, C488 Check CN401 and cable. of R, G, B input? Does the clock pulse appear at Check related circuit of IC350. output of RA351 ~ RA356? WAVEFORMS Does the clock pulse...
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CONFIDENTIAL 5 Troubleshooting 5-3 No Picture (TV, Video, S-Video, DVD, DTV) Check Pin 185, 196 (S-Video) Check the CN888 (Tuner) and the and Pin 184 (VCR) and Pin 183 CN702-1 (VCR connector). (RF-CVBS) of IC200 (DPTV_3D). Does the signal appear at Check the IC200 IC200 and +3.3V_BA? and related circuit of IC200.
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CONFIDENTIAL 5 Troubleshooting 5-4 No Sound Does the signal appear at Pin 67 (Tuner sound signal) and Pin Check the CN403 (PC conector) and the 47, 48 (PC sound) and Pin 56, 57 (VCR CN402 (VCR connector) and the CN200 sound) and Pin 53, 54 (DVD) Pin 50, (DVD) and the CN888 (Tuner).
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CONFIDENTIAL 6 Exploded View and Parts List 6-1 NK15N* NK15N*/NK17N*...
CONFIDENTIAL 9 Wiring Diagram CN601(15", 17") BRIGHT CONTROL KEY1 To Inverter CN706_1 KEY1 CN920 INVERTER ON/0FF SPK OUT R + CN502 SPK OUT R SPK OUT L + CN501 SPK OUT L AUDIO R IN AUDIO L IN VCR CVB S Y IN LED_GRN C IN...