Samsung DP17LS/LT, DP15HS/HT manual No Video

Page 25

5-1-16 No Video

Check signal cable and connection.

IC101 Pins 5, 8 and 10 inputs

15

are right?

Yes

IC101 Pins 21, 24 and 26

16

outputs are right?

Yes

IC103 Pins 1, 2 and 3 outputs

17

are right?

Yes

Cathode DC levels are right?

Yes

G2 voltage is right?

Yes

Change CRT.

Done.

No

No

No

No

No

Check the signal cable connection.

Check I2C bus and +12 V line.

Check +12 V, +72 V line.

Check and replace IC103.

Check +72 V line.

Check and replace QR01, QR02,

QG01, QG02, QB01, QB02.

Check G2 wire, CRT Socket board,

and FBT.

5 Troubleshooting

WAVEFORMS

15 1.00 V (IC101, #5, 8, 10)

CH1 P-P = 1.00V

CH1 RMS = 2.452V

16 1.00 V (IC101, #21,24,26)

CH1 P-P = 1.00V

CH1 RMS = 2.792V

17 20.0 V (IC103, #1, 2, 3)

CH1 P-P = 20.0V

CH1 RMS = 40.52V

DP15H*/DP17L*

5-9

Image 25

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 Coordinates Temperature Color AdjustmentsColor Adjustments for 9300K Color Purity Adjustment Focus AdjustmentLuminance Uniformity Check For trained and experienced service technicians only Parts Level Troubleshooting TroubleshootingNo Power Supply Dpms Failure Correction Failure HDeflection FailureInvariable HSize HLin. FailureAbnormal HSize Para. or Pin Balance Failure Side Pin or Trap Failure Tilt Failure Size or Pos. Variation Failure Deflection FailureABL Failure High Voltage FailureDynamic Focus Failure No Video Micom Failure OSD Failure Degaussing Failure User Control FailureNo Picture General TroubleshootingShut 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