5
Table of Contents
Introduction ............................................................................................................................................................................ 7
Scope ........................................................................................................................................................................................ 7
Related Documents................................................................................................................................................................... 7
Firmware Revisions .................................................................................................................................................................. 7
Manual Revisions ..................................................................................................................................................................... 7
Safety Considerations ............................................................................................................................................................... 8
Electrostatic Discharge ............................................................................................................................................................. 8
Verification.............................................................................................................................................................................. 9
Introduction .............................................................................................................................................................................. 9
Test Equipment Required ......................................................................................................................................................... 9
CC Mode Test......................................................................................................................................................................... 10
CV Mode Test ........................................................................................................................................................................ 11
CR Mode Test......................................................................................................................................................................... 12
Transient Operation and Slew Circuit Test............................................................................................................................. 14
CC Mode PARD Test ............................................................................................................................................................. 15
CC Mode Power Limit............................................................................................................................................................ 15
Troubleshooting .................................................................................................................................................................... 21
Introduction ............................................................................................................................................................................ 21
Test Equipment Required ....................................................................................................................................................... 21
Overall Troubleshooting Procedures ...................................................................................................................................... 21
Selftest Sequence and Error Messages.................................................................................................................................... 22
Primary Interface ................................................................................................................................................................ 22
Secondary Interface ............................................................................................................................................................ 26
Test Points .......................................................................................................................................................................... 27
Signature Analysis .................................................................................................................................................................. 31
Firmware Revisions ............................................................................................................................................................ 31
Test Header Jumper Positions............................................................................................................................................. 32
Test Setup for Signature Analysis....................................................................................................................................... 33
DAC Circuits Troubleshooting (Figure 3-3)........................................................................................................................... 43
Slew Circuit Troubleshooting (Figure 3-4)............................................................................................................................. 45
CC/CV CONTROL CIRCUIT TROUBLESHOOTING (Figure 3-5).................................................................................... 46
Input Power Stages Troubleshooting (Figure 3-6).................................................................................................................. 50
Transient Generator Troubleshooting (Figure 3-7)................................................................................................................. 51
General Troubleshooting .................................................................................................................................................... 51
Transient Generator Frequency........................................................................................................................................... 51
Toggle or Pulse Modes ....................................................................................................................................................... 51
Trigger Circuit Troubleshooting (Figure 3-8)......................................................................................................................... 53
Overcurrent Circuit Troubleshooting (Figure 3-9).................................................................................................................. 55
Overpower Circuit Troubleshooting (Figure 3-10)................................................................................................................. 56
Post Repair Calibration........................................................................................................................................................... 57
EEPROM Initialization........................................................................................................................................................... 57
Disassembly Procedures ......................................................................................................................................................... 58
AC Receptacle .................................................................................................................................................................... 58
Fan ...................................................................................................................................................................................... 58
Front Panel.......................................................................................................................................................................... 59
Keypad................................................................................................................................................................................ 59
LCD Display and Window.................................................................................................................................................. 59
Line Switch......................................................................................................................................................................... 59