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 SCART1, SCART2 Separate Items Scart1 Scart2 Audio Out (R;500mV/1KΩ) Green Audio IN (R;500mV/10KΩ) Blue Audio Out (L;500mV/1KΩ) Audio Common GND GND (DDC Return) Blue GND GND-Red Audio IN (L;500mV/10K) GND-Green Blue IN (700mV/75Ω) GND-Blue Function S/W...
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 NK15A*/NK17A*...
CONFIDENTIAL 3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the NK15A*/NK17A* 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 NK15A*/NK17A* Great user manuals database on...
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CONFIDENTIAL 4 Alignments and Adjustments NK15A*/NK17A* Great user manuals database on UserManuals.info...
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CONFIDENTIAL 4 Alignments and Adjustments Memo NK15A*/NK17A* Great user manuals database on UserManuals.info...
CONFIDENTIAL 5 Troubleshooting 5-1 No Power Does proper DC 14V appear at DC Check SMPS PCB and Adapter. jack connected to CN801? Does proper DC 3.3V_A Check IC801. (#2) appear at FT852? Does proper DC 2.5V_A Check IC802. appear at Pin 3 of IC802? Does proper DC 3.3V_B Check IC805.
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CONFIDENTIAL 5 Troubleshooting 5-2 No Video (PC Signal) Power indicator is green. Does the signal appear at C306, C398, C397 Check CN401 and cable. of R, G, B input? Does the clock pulse appear at Check related circuit of IC350. output of RA351 ~ RA356? Does the clock pulse Check R354 and related...
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CONFIDENTIAL 5 Troubleshooting 5-3 No Picture (TV, Video, S-Video, SCART) Check the CO44, CO45(S-Video), CO46(VCR) and CO42(RF-CVBS). Check the CN888(Tuner) IC011 #1 RF-CVBS and the CN702_1. IC011 #5 S-Video IC011 #8 VCR Check the #19 and Does the signal appear at IC010. related circuit of IC011.
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CONFIDENTIAL 5 Troubleshooting WAVEFORMS IC011 #1 RF-CVBS IC011 #5 S-Video IC011 #8 VCR IC011 #19 IC010 Data Out NK15A*/NK17A* Great user manuals database on UserManuals.info...
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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 CN402 (CN001) and the CN200 (CN002) (SCART1 sound) and Pin 53, 54 and the CN888 (Tuner) and the CN702_1.
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CONFIDENTIAL 5 Troubleshooting Memo NK15A*/NK17A* Great user manuals database on UserManuals.info...
CONFIDENTIAL 9 Wiring Diagram CN901(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...
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CONFIDENTIAL 9 Schematic Diagrams Memo NK15A*/NK17A* Great user manuals database on UserManuals.info...
CONFIDENTIAL 10 Schematic Diagrams 10-1 CPU Block & Signal Processing Part Schematic Diagram PAG(0:7) PAR(0:7) TO DPTV DIGITAL INPUT AD(0:7) PAB(0:7) +3.3V_A IC002 IC003 TO DPTV SUPLECODE SUPLECODE MCAD(0:7) MCAD(0:7) +3.3V_BD C336 C602 PARALLEL COMM 100uF IC004 IC005 100nF SUPLECODE SUPLECODE IC001 MCA(0:19)
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CONFIDENTIAL 10 Schematic Diagrams Full White R, G, B Input (C306, 398, 397) IC011 #1 RF-CVBS IC011 #5 S-Video IC011 #8 VCR IC011 #19 IC010 Data Out 10-2 NK15A*/NK17A* Great user manuals database on UserManuals.info...
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