OHAUS EB SERIES Service Manual

Contents

OHAUS EB SERIES Service Manual Manual pdf 15 page image

CHAPTER 2 DIAGNOSISEB Series Scales Series Service Manual 2-3 Ohaus Corporation www.ohaus.comTABLE 2-3. SCALE DOES NOT RESPOND TO FRONT PANEL CONTROLS.SYMPTOM PROBABLE CAUSE REMEDYScale does notrespond to front panelcontrols.Membrane Switch defective Test the Membrane Switch (Section2.6). Replace if necessary (Section3.2). If membrane switches are OK,test the Main PC Board (Section 2.8).If defective, replace the Main PCB(Section 3.3.1).After repair, proceed with PerformanceTests in Chapter 4.TABLE 2-4. NO DISPLAY OR PARTIAL DISPLAY.SYMPTOM PROBABLE CAUSE REMEDYDisplay is not on orpartial characters aredisplayed.Display PC Board isdefective or LCD may bedefective.NOTE: If the LCD showssigns of damage such ascracked, dim or partialcharacters, the LCD shouldbe replaced.The Display PC Board is replaced as awhole assembly. Check procedures inTables 2-1, 2-2 and 2-3 first and verifythat other problems do not exist.Replace Display PC Board or LCD.See Repair Procedures 3.3.2 and3.3.3.After repair, proceed with PerformanceTests in Chapter 4.