Fluke 2625A User Manual

5-1

5-1.

Introduction .......................................................................................... 5-3

5-2.

Servicing Surface-Mount Assemblies .................................................. 5-3

5-3.

Error Codes........................................................................................... 5-4

5-4.

General Troubleshooting Procedures ................................................... 5-6

5-5.

Power Supply Troubleshooting ............................................................ 5-8

5-6.

Raw DC Supply................................................................................ 5-8

5-7.

Power Fail Detection........................................................................ 5-8

5-8.

5-Volt Switching Supply.................................................................. 5-8

5-9.

Inverter ............................................................................................. 5-9

5-10.

Analog Troubleshooting....................................................................... 5-12

5-11.

DC Volts Troubleshooting............................................................... 5-17

5-12.

AC Volts Troubleshooting............................................................... 5-17

5-13.

Ohms Troubleshooting..................................................................... 5-18

5-14.

Digital Kernel Troubleshooting ........................................................... 5-19

5-15.

Digital and Alarm Output Troubleshooting ......................................... 5-21

5-16.

Digital Input Troubleshooting .............................................................. 5-21

5-17.

Totalizer Troubleshooting .................................................................... 5-21

5-18.

Display Assembly Troubleshooting ..................................................... 5-23

5-19.

Variations in the Display...................................................................... 5-25

5-20.

Calibration Failures .............................................................................. 5-26

5-21.

Introduction...................................................................................... 5-26

5-22.

Calibration-Related Components..................................................... 5-26

5-23.

Retrieving Calibration Constants..................................................... 5-28

5-24.

Replacing the EEPROM (A1U1) ..................................................... 5-28

5-25.

IEEE-488 Interface PCA (A5) Troubleshooting .................................. 5-29

5-26.

Memory PCA (A6) Troubleshooting ................................................... 5-29

5-27.

Power-Up Problems ......................................................................... 5-29