Samsung NK17A user manual

User manual for the device Samsung NK17A

Device: Samsung NK17A
Size: 2,11 MB
Date of adding : 2013-12-02 16:17:28
Number of pages: 115
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Samsung NK17A user manual
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Summaries

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Abstracts of contents
Summary of the content on the page No. 1

CONFIDENTIAL
TFT-LCD TV/MONITOR
NK15A*/NK17A*
Manual
SERVICE
TFT-LCD TV/MONITOR CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly & Reassembly
4. Alignment & Adjustments
5. Troubleshooting
6. Exploded View & Parts List
7. Electrical Parts List
8. Block Diagram
9. Wiring Diagram
10. Schematic Diagrams
11. Panel Description

Summary of the content on the page No. 2

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 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 before servicing. LEAKAGE DEVICE CURRENT UNDER TESTER TEST 1-1-2 Servicing the LCD Monitor TEST ALL EXPOSED METAL SURFACES 1. When servicing the

Summary of the content on the page No. 3

1 Precautions CONFIDENTIAL 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 unit’s AC

Summary of the content on the page No. 4

CONFIDENTIAL 2 Product Specifications 2-1 Specifications Description Item NK15A* NK17A* LCD Panel TFT-LCD panel, RGB vertical stripe, normaly TFT-LCD panel, RGB vertical stripe, normaly white, 15-Inch viewable, 0.261 mm pixel pitch white, 17-Inch viewable, 0.2895 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 61 kHz (Automatic) Vertical : 56 Hz ~ 75 Hz (Automatic) Display Colors 16.2 Million colors Maximum Resolution Horizontal : 1280 Pixels 1280 Pixels Vertical : 768 Pixels

Summary of the content on the page No. 5

2 Product Specifications CONFIDENTIAL 2-2 Pin Assignments 2-2-1 D-SUB 2-2-2 SCART1, SCART2 Pin Pin Separate Items Scart1 Scart2 No 1 Red 1 Audio Out (R;500mV/1KΩ ) OO 2 Green 2 Audio IN (R;500mV/10KΩ ) O O 3 Blue Audio Out (L;500mV/1KΩ ) 3 O O 4 GND Audio Common GND 4 O O 5 GND (DDC Return) 5 Blue GND O O 6 GND-Red 6 Audio IN (L;500mV/10K) O O 7 GND-Green O 7 Blue IN (700mV/75Ω ) 8 GND-Blue Function S/W O O 8 9 No Connection (0~2V/9, 5V~12V) 10 GND-Sync./Self Test 9 Green GND O O 11 GND 10 No Co

Summary of the content on the page No. 6

2 Product Specifications CONFIDENTIAL 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 µ s µ s µ s µ s µ s µ s µ s µ s NK15A*/NK17A* 2-3

Summary of the content on the page No. 7

2 Product Specifications CONFIDENTIAL 2-3-2 Supported Modes (1) µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s 2-4 NK15A*/NK17A*

Summary of the content on the page No. 8

2 Product Specifications CONFIDENTIAL 2-3-2 Supported Modes (2) µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s NK15A*/NK17A* 2-5

Summary of the content on the page No. 9

2 Product Specifications CONFIDENTIAL 2-3-2 Supported Modes (3) µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s µ s 2-6 NK15A*/NK17A*

Summary of the content on the page No. 10

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. Follow these directions carefully; never use metal instruments to pry apart the cabinet. 5. Connect the TV only to an DC power sourc

Summary of the content on the page No. 11

3 Disassembly and Reassembly CONFIDENTIAL 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. 3-3 Reassembly Reassembly procedures are in the reverse order of Disassembly procedures. 3-2 NK15A*/NK17A*

Summary of the content on the page No. 12

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. Correct impedance matching is essential. 4. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV. When inserting signal markers,do not allow the marker generator

Summary of the content on the page No. 13

4 Alignments and Adjustments CONFIDENTIAL 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 4-2 NK15A*/NK17A*

Summary of the content on the page No. 14

4 Alignments and Adjustments CONFIDENTIAL NK15A*/NK17A* 4-3

Summary of the content on the page No. 15

4 Alignments and Adjustments CONFIDENTIAL Memo 4-4 NK15A*/NK17A*

Summary of the content on the page No. 16

CONFIDENTIAL 5 Troubleshooting 5-1 No Power No Does proper DC 14V appear at DC Check SMPS PCB and Adapter. jack connected to CN801? Yes No Does proper DC 3.3V_A 1 Check IC801. (#2) appear at FT852? Yes No Does proper DC 2.5V_A Check IC802. appear at Pin 3 of IC802? Yes No Does proper DC 3.3V_B 2 Check IC805. (#1) appear at FT822? Yes No Does proper DC 2.5V_B Check IC806. appear at Pin 3 of IC806? WAVEFORMS IC801 #2 IC805 #1 1 2 NK15A*/NK17A* 5-1

Summary of the content on the page No. 17

5 Troubleshooting CONFIDENTIAL 5-2 No Video (PC Signal) Power indicator is green. Yes Does the signal appear No 3 at C306, C398, C397 Check CN401 and cable. of R, G, B input? Yes No Does the clock pulse appear at Check related circuit of IC350. output of RA351 ~ RA356? Yes No Does the clock pulse Check R354 and related appear at R354? circuit of R354. Yes No Does the clock pulse Check X201 and related 4 appear at X201? circuit of X201. Yes No Does the clock pulse appear at Replace RA301 ~ RA3

Summary of the content on the page No. 18

5 Troubleshooting CONFIDENTIAL 5-3 No Picture (TV, Video, S-Video, SCART) Check the CO44, CO45(S-Video), CO46(VCR) and CO42(RF-CVBS). No Check the CN888(Tuner) 5-1 IC011 #1 RF-CVBS and the CN702_1. 5-2 IC011 #5 S-Video 5-3 IC011 #8 VCR Yes No Check the #19 and 6 Does the signal appear at IC010. related circuit of IC011. Yes Check the IC010 (#31~34, No Does the signal appear at 7 37~44, 47~50) Data out IC200 and 3.3V_BA. and related circuit of IC010. Yes No Does the signal appear at Check t

Summary of the content on the page No. 19

5 Troubleshooting CONFIDENTIAL WAVEFORMS IC011 #1 RF-CVBS IC011 #5 S-Video IC011 #8 VCR 5-1 5-2 5-3 IC011 #19 IC010 Data Out 6 7 5-4 NK15A*/NK17A*

Summary of the content on the page No. 20

5 Troubleshooting CONFIDENTIAL 5-4 No Sound Does the signal appear at Pin 67 (Tuner sound signal) and Pin Check the CN403 (PC conector) and the No 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. (SCART2) Pin 50, 51 (VCR) of IC 919 (MSP3451)? Yes No Does the signal appear at Pin 27, Check the IC919 and 28 of IC919 (MSP3451)? related circuit of IC919. Yes No Does the signal appear Check the IC501 (Audio am


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