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Technical Publication Document NO: SYSTEM-007-ENG (Ver.1.1)
HF-525Plus Installation, Operation and Service Manual
12.4.5 HV-DRV-OLP trouble or Error Pro O- - - error (XR7-FnD Board)
1) Consist of PCB
2) Check procedure about Board
(1) Board Name: XR7-FnD Board
(2) Functions: Controlling IGBT and Tube Filament
(3) Check wiring condition of XR7-FnD Board and check waveforms at the HV-DRV-OLP check point with
oscilloscope when IGBT Device signal and protection circuit trouble and checked waveforms are as follows.
Displayed on console
(Error Pro o---)
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