Fluke 39 - Page 4

39/41B
Service Manual
ii
2-23. Level Shifter ................................................................................ 2-9
2-24. A/D Converters ................................................................................ 2-9
2-25. Digital Kernel................................................................................... 2-10
2-26. Digital Signal Processor (U2)...................................................... 2-10
2-27. Programmable Logic Device ....................................................... 2-10
2-34. SRAMs (U5,U6,U7).................................................................... 2-13
2-35. EPROM (U4)............................................................................... 2-13
2-36. EEPROM (U11)........................................................................... 2-13
2-37. Serial EEPROM (U22) ................................................................ 2-13
2-38. Keypad ............................................................................................. 2-13
2-39. Display ............................................................................................. 2-13
2-40. LCD Module................................................................................ 2-13
2-41. BackLight .................................................................................... 2-14
2-42. Contrast Control - EEPOT (U8) ................................................. 2-14
2-43. Optical Interface (Model 41B Only)................................................ 2-14
2-44. Transmitter................................................................................... 2-14
2-45. Receiver....................................................................................... 2-14
3 General Maintenance......................................................................... 3-1
3-1. Introduction .......................................................................................... 3-3
3-2. Warranty Repairs and Shipping Information........................................ 3-3
3-3. General Maintenance Information........................................................ 3-3
3-4. Required Equipment......................................................................... 3-3
3-5. Static-Safe Handling ........................................................................ 3-3
3-6. Cleaning................................................................................................ 3-4
3-7. Disassembling the Tester...................................................................... 3-4
3-8. Removing the Meter Case Bottom................................................... 3-4
3-9. Removing the PCA and Input Module............................................. 3-5
3-10. Removing the LCD Module............................................................. 3-6
3-11. Removing the Elastomeric Keypad.................................................. 3-6
3-12. Reassembling the Tester....................................................................... 3-6
3-13. Installing the PCA and Input Module .............................................. 3-6
3-14. Reassembling the Case Bottom........................................................ 3-7
4 Performance Testing and Calibration............................................... 4-1
4-1. Introduction .......................................................................................... 4-3
4-2. Required Equipment............................................................................. 4-3
4-3. Performance Tests ................................................................................ 4-4
4-4. Warming-Up the Tester.................................................................... 4-4
4-5. Checking the Display Pixels ............................................................ 4-4
4-6. Testing Voltage Performance........................................................... 4-4
4-7. Testing Amps Performance.............................................................. 4-5
4-8. Testing Watts, VA, VAR Performance............................................ 4-8
4-9. Testing Record Mode Performance ................................................. 4-8
4-10. Testing Memory Mode Performance (Model 41B Only)................. 4-9
4-11. Testing Harmonics Volts Performance............................................ 4-9
4-12. Testing Harmonics Amps Performance ........................................... 4-10
4-13. Testing Serial I/O Performance (Model 41B Only)......................... 4-11
4-14. Calibrating the Tester ........................................................................... 4-12
4-15. Introduction...................................................................................... 4-12
4-16. Entering Calibration Mode............................................................... 4-12
4-17. Making Calibration Adjustments..................................................... 4-16
4-18. Exiting the Calibration Mode........................................................... 4-17
4-19. Setting the Minimum Contrast Level ................................................... 4-18