Samsung DP17LS/LT, DP15HS/HT manual Parts Level Troubleshooting, No Power Supply

Page 17

5 Troubleshooting

5-1 Parts Level Troubleshooting

Notes: 1. If a picture does not appear, fully rotate the brightness and contrast controls clockwise and reinspect.

2.Check the following circuits.

•No raster appears: Power circuit, Horizontal output circuit.

•High voltage develops but no raster appears: Video output circuits.

•High voltage does not develop: Horizontal output circuits.

5-1-1 No Power Supply

Check and replace D601, FH1

Yes

Chirping noise exists?

Yes

Repeating start?

1IC601 Pin 1 waveform is right?

Yes

C622 Voltage is 13 V ± 0.5V?

Yes

Normal operation

Yes

Verify voltages.

Yes

Done.

Check and replace IC601.

Check and replace D606.

Check and replace D614, IC601,

Q602, ZD601.

Check and replace IC201, IC301,

IC401, Q402, Q404.

Replace Main board.

WAVEFORMS

1100 V (IC601, #1)

CH1 P-P = 100 V

CH1 RMS = 350.2 V

DP15H*/DP17L*

5-1

Image 17

Contents Color Monitor Copyright Safety Precautions PrecautionsProduct Safety Notices Servicing the High Voltage VR and CRTElectrostatically Sensitive Devices ESD Precautions Servicing PrecautionsSpecifications Product SpecificationsSync Type Separate Pin AssignmentsIBM Vesa Timing ChartMemo Adjustment Conditions Alignment and AdjustmentsBefore Making Adjustments Required EquipmentSetup 2, Without Signal Generator Connecting the SoftJigCentering Display Control AdjustmentsStandard Modes Linearity LinearityPinbalance Adjustment Trapezoid AdjustmentParallelogram Adjustment Side Pincushion AdjustmentColor Adjustments for 9300K Color AdjustmentsColor Coordinates Temperature Luminance Uniformity Check Focus AdjustmentColor Purity Adjustment For trained and experienced service technicians only No Power Supply TroubleshootingParts Level Troubleshooting Dpms Failure Correction Failure HDeflection FailureAbnormal HSize HLin. FailureInvariable HSize Tilt Failure Side Pin or Trap FailurePara. or Pin Balance Failure Size or Pos. Variation Failure Deflection FailureABL Failure High Voltage FailureDynamic Focus Failure No Video Micom Failure OSD Failure Degaussing Failure User Control FailureShut Down General TroubleshootingNo Picture Missing Color Visible Retrace Unsynchronized Image Misconvergence Purity Failure Poor FocusDP15HS Exploded View and Parts ListDP17LS Front Cover & CRT Ass’y DP15HS Chassis & Stand Ass’y DP15HS Rear Cover Ass’y DP15HS Front Cover & CRT Ass’y DP17LS Chassis & Stand Ass’y DP17LS Rear Cover Ass’y DP17LS Main PCB Parts Electrical Parts ListLoc. No CIS FBT FH1 Fuse ASSY,HEAT/SINK Carbon Metal Carbons Carbon Carbons Carbon Carbons Metal Carbon Fusible Carbons 17 ! 15 ! 17 ! 15 ! 17 ! 15 ! 17 AA,3.5x1.0x5.7mm,1500 Video PCB PartsLJP1 VID VID+H/S Others Different Parts List CDT Memo Block Block Diagrams Main PCB Wiring DiagramSmps Part Schematic Diagram Schematic DiagramsSchematic Diagrams Micom Part Schematic Diagram DP15H*/DP17L 10-4 10-3 H/V OSC & Vertical Part Schematic Diagram DP15H*/DP17L 10-6 Deflection Part Schematic Diagram DP15H*/DP17L 10-8 Video Part Schematic Diagram DP15H*/DP17L 10-10 10-11 DP15H*/DP17L Code No. BH68-00129A

DP15HS/HT, DP17LS/LT specifications

The Samsung DP17LS/LT and DP15HS/HT are modern digital displays designed for commercial and professional use, showcasing cutting-edge technology and versatile features that cater to a variety of applications. These models are part of Samsung’s commitment to innovation in display solutions, offering impressively vivid visuals and reliable performance.

One of the standout features of the DP17LS/LT and DP15HS/HT is their high-resolution display capabilities. The panels are engineered to deliver sharp and detailed images, making them ideal for advertising, information kiosks, and interactive displays. With a brightness level that exceeds industry standards, these models ensure visibility even in brightly lit environments, allowing content to stand out and capture attention effectively.

Both the DP17LS/LT and DP15HS/HT models are equipped with advanced LED technology, which not only enhances color accuracy and contrast but also provides energy efficiency. This makes them a sustainable choice for businesses looking to minimize their ecological footprint while maximizing visual impact. Moreover, the ultra-narrow bezels of these displays allow for a seamless multi-display setup, enabling businesses to create an immersive visual experience.

Another prominent characteristic is their user-friendly interface and connectivity options. The displays support multiple input types, including HDMI, DisplayPort, and USB, ensuring compatibility with a wide range of devices and systems. This versatility simplifies integration into existing setups and allows for easy content management.

The DP17LS/LT and DP15HS/HT models also incorporate advanced cooling technology to maintain optimal performance during extended operation, minimizing the risks of overheating. This is particularly crucial for environments where displays are running continuously, such as retail stores and transportation hubs.

Furthermore, Samsung’s commitment to durability and longevity is evident in the design of these displays. Built with high-quality materials, they are resistant to wear and tear, ensuring that they remain operational even in high-traffic areas.

In conclusion, the Samsung DP17LS/LT and DP15HS/HT displays stand out as reliable solutions for businesses seeking high performance, vibrant visuals, and robust features. Their combination of cutting-edge technology and practical design makes them an excellent choice for a variety of commercial applications, where quality and efficiency are paramount.