189II/AN
Service Manual
ii
Removing and Reinserting the Printed Circuit Assembly............................. 13
Reassembling the Meter Case........................................................................ 14
Testing Fuses (F1 and F2) ............................................................................. 14
Replacing Fuses............................................................................................. 15
Replacing the Batteries.................................................................................. 15
Cleaning......................................................................................................... 16
Performance Tests.............................................................................................. 16
Factory Default.............................................................................................. 17
Power LED Test ............................................................................................ 17
Backlight Test................................................................................................ 17
Current Terminal Sensing Test...................................................................... 17
Keypad Test................................................................................................... 17
LCD Test ....................................................................................................... 17
IR Port Verification ....................................................................................... 18
Temperature Accuracy Test........................................................................... 18
Accuracy Tests for Volts, Current, Ω, E, and G Test Functions ............... 19
Calibration Adjustment...................................................................................... 22
Operation ....................................................................................................... 23
Entering the Password ................................................................................... 23
Changing the Password ................................................................................. 23
Restoring Factory Default Password ............................................................. 23
Calibration Adjustment Procedure ................................................................ 24
Screenshot Description.............................................................................. 24
Softkeys..................................................................................................... 25
Navigation Buttons.................................................................................... 25
Mode Buttons............................................................................................ 25
Description of Calibration Adjustment Steps............................................ 25
Power Cycle .............................................................................................. 26
Calibration Adjustment Steps........................................................................ 26
Parts ................................................................................................................... 31
Schematic Diagrams .......................................................................................... 33
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