Samsung MH026FPEA Training Manual

Also see for MH026FKEA: User manual User manual Installation manual Service manual Service manual

95Samsung ElectronicsTroubleshooting8-3-2 When the power voltage is not available1. Checklist :1) Is the power voltage is normal? (The rating voltage ±10% range)2) Is the power cord is correctly connected and is the contact good?3) Does the sound "ting" come out?If it doesn't come out the sound "ting", do inspect and repair in accordance with the following inspection sequence.2. Troubleshooting procedureKA7805 is out of order - replaceReplace the fuse (250V, 3.15A).Check of the installation methodand electrical circuitNoYesNoReplace ofAss'y display PCBReplace the main PCB of indoor unitNo trouble(normal)Check ofremote controlNormalYesYesNoYesNoNoYesNoYesNoYesApply the powerIs the outdoor power connected normally?Is the fuse (F701, 250V, 3.15A) of PCB open?Is the output voltage of electrostatic voltageregulator IC (KA7805) DC 4.5V ~ 5.5V?Is the operation icon( ) lampflickering with the sound of "ting"?Is the operation lamp( )of indoor unit on whenthe operation /stop buttonof remote controlis pressed?Is the communicationsignal of remote controlsurely sent and received ?Is there no problembetween the connector ofAss'y display PCB and thereceiving module?