Samsung DP17LS/LT, DP15HS/HT manual OSD Failure

Page 27

5-1-18 OSD Failure

Check CN104 and connector Ass’y.

19IC104 Pin 6 input is right?

Yes

20IC104 Pin 17 input is right?

Yes

IC104 Pins 7 and 8 inputs are

right?

Yes

IC104 Pins 12, 13 and 14

outputs are right?

No

IC101 Pins 21, 24 and 26

21

outputs are right?

Yes

Check and replace IC103.

Done

No

No

No

No

No

Check and replace Q102.

Check CN102 Pin 14.

Check and replace Q101.

Check CN102 Pin 8.

Check IC201 Pins 41 and 42.

Check and replace IC104.

Check and replace IC101.

5 Troubleshooting

WAVEFORMS

19 1.00 V (IC104, #6)

CH1 P-P = 1.00V

CH1 RMS = 4.516V

20 1.00 V (IC104, #17)

CH1 P-P = 1.00V

CH1 RMS = 5.024V

21 1.00 V (IC101, #21.24.26)

CH1 P-P = 1.00V

CH1 RMS = 2.580V

DP15H*/DP17L*

5-11

Image 27

Contents

Color Monitor Copyright Servicing the High Voltage VR and CRT PrecautionsSafety Precautions Product Safety NoticesElectrostatically Sensitive Devices ESD Precautions Servicing PrecautionsSpecifications Product SpecificationsSync Type Separate Pin AssignmentsIBM Vesa Timing ChartMemo Required Equipment Alignment and AdjustmentsAdjustment Conditions Before Making AdjustmentsSetup 2, Without Signal Generator Connecting the SoftJigCentering Display Control AdjustmentsStandard Modes Linearity LinearitySide Pincushion Adjustment Trapezoid AdjustmentPinbalance Adjustment Parallelogram AdjustmentColor Adjustments Color Coordinates TemperatureColor Adjustments for 9300K Focus Adjustment Color Purity AdjustmentLuminance Uniformity Check For trained and experienced service technicians only Troubleshooting Parts Level TroubleshootingNo Power Supply Dpms Failure Correction Failure HDeflection FailureHLin. Failure Invariable HSizeAbnormal HSize Side Pin or Trap Failure Para. or Pin Balance FailureTilt Failure Size or Pos. Variation Failure Deflection Failure ABL Failure High Voltage FailureDynamic Focus Failure No Video Micom Failure OSD Failure Degaussing Failure User Control FailureGeneral Troubleshooting No PictureShut Down 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