Samsung ES15U, LTM1555(B) specifications Troubleshooting, No Power

Page 13

CONFIDENTIAL

5 Troubleshooting

5-1 No Power

Does proper DC 14 V appear at DC jack connected to CN12?

Yes

Does proper DC 5 V appear at

Pin 2 of IC11?

Yes

Does proper DC 14V appear at

Pin 1 of IC11?

Yes

Does proper DC 3.3 V appear at

Pin 3 of IC14?

Yes

Does proper DC 2.5 V appear at

Pin 4 of IC109 and IC17?

No

No

No

No

No

Check SMPS PCB and Adapter.

Check IC11.

Check IC11.

Check IC14.

Check IC109 and IC17.

Yes

Check IC23.

LTM1555(B)/LTM1755(B)

5-1

Image 13

Contents TFT-LCD Monitor BN82-00071A-00 Safety Precautions PrecautionsElectrostatically Sensitive Devices ESD Precautions Servicing PrecautionsSpecifications Product SpecificationsSync Type Pin No Separate H/V Pin AssignmentsIBM Vesa Timing ChartMemo Disassembly Disassembly and ReassemblyReassembly General Alignment Instruction Alignments and AdjustmentsService function Adjustment InstructionNo Power TroubleshootingNo Video PC Signal No Picture TV, Video, S-Video No Sound Exploded View and Parts List 1 LTM1555B 2 LTM1555B Front 3 LTM1555B Rear 3 LTM1555B Stand 1 LTM1755B 2 LTM1755B Front 3 LTM1755B Rear 3 LTM1755B Stand Electrical Parts List INDUCTOR-AXIAL SCREW-TAPTITE PCBR27 ES15UO SNA ES15UOAL,SMD CERAMIC,CHIP Loc. No Code NoCERAMIC,CHIP AL,SMD Organic CERAMIC,CHIP AL,SMD C43 C533 C619 74F14,INVERTER,SOP,14P,150MIL INDUCTOR-SMDINDUCTOR-SMD Coil CHOKE-SMD PCB Main TR-SMALL Signal Chip R128 R240 R330 R383 R461 R549 +C/R STD+C/RAssy Cover Rear Assy REAR-COVER Bracket Vesa COVER-REAR Assy LCD Assy ChassisLever Bottom Label BAR Code BOX CBF SignalES15UO SNA LXA410TLMU,PE,-,WHITE ES17UO Gasket15P,3R,FEMALE,ANGLE,AUF 2P,-,AU,WHT/REDCORE-FERRITE Bead AL,SMD CERAMIC,CHIP C153 AL,SMD CERAMIC,CHIP CERAMIC,CHIP AL,SMD C510 C610 CN62 IC-CMOS Logic 2007-000132 R15 R2554 R349 R436 R610 R621 GH17LS Assy LCD Assy Chassis Assy P/MATERIALEOS/NIKE,EGI,T1.2 VIRTUAL,HDTV,ABS V0,GR806PM170MP,PE-HD,-,BLUE M170MP,PE-LD,PE-HD,-,WHITEBlock Diagram Block Diagrams CN12 CN11 CN51 CN24 CN25 Wiring DiagramSchematic Diagrams Power Eosventsc Part Schematic Diagram Schematic Diagrams10-2 Hpdr Micom / Jack Part Schematic Diagram10-4 JAG Scalar Eosventsc Part Schematic Diagram10-6 FBL1 FBL2 RIN1 GIN1 Video Eosventsc Part Schematic Diagram10-8 OUT GND Audio Part Schematic Diagram10-10 VDD4 VSS1 Lvds & RAM Eosventsc Part Schematic Diagram10-12 SEC Panel DescriptionMemo Copyright