OHAUS EB3 Service Manual

Also see for EB15: Service manual Instruction manual Instruction manual

OHAUS EB3 Service Manual Manual pdf 9 page image

2-1CHAPTER 2 DIAGNOSIS2. DIAGNOSISThis section contains information needed to properly evaluate the reported problem and diagnose itscause.2.1 SCALE SETUP AND EXAMINATIONSet up the scale according to the Instruction manual. Allow the scale to stabilize to room temperature.Examine the scale for signs of corrosion or physical damage.2.2 PRELIMINARY CHECKSPower up the scale using the customer’s ac adapter. In the case where the scale will not power up,check the ac adapter. Observe and record the error codes and software revision. Record all menu settingsas received.2.3 TROUBLESHOOTING TABLESTroubleshooting tables 2-1 through 2-7 identify actual types of problems that could be encountered withthe scale.The troubleshooting tables refer to an interconnection diagram in Section 3 to assist in locating theproblem.2-1 SCALE WILL NOT TURN ON WITH AC ADAPTER.SYMPTOMScale will not turn on with ACadapter supplied.PROBABLE CAUSEAdapter defective.Membrane Switch defective.Main PC Board is defective.REMEDYRefer to Section 3.1 and check the acadapter voltage output. If voltage islow or nonexistent, replace the acadapter. If OK, proceed.Refer to Section 3.2 and test the Mem-brane Switch. Replace if necessary.See Repair Procedure 4.2If the scale fails to turn on with a newMembrane Switch, the Main PC Boardshould be tested in accordance withsection 3.4. The Main PC Board ifdefective should be replaced. See Re-pair Procedures 4.3. After repair, pro-ceed with Performance Tests in Section3.6.