Ecoray HF-525Plus - Page 205

205
Technical Publication Document NO: SYSTEM-007-ENG (Ver.1.1)
HF-525Plus Installation, Operation and Service Manual
2) Check procedure
(1) Board Name: XR7-FnD Board
(2) Functions: Controlling IGBT and Tube Filament
(3) Check high voltage cable, filament short condition of X-ray tube, wiring condition of circuit when IGBT
Device signal and protection circuit trouble and then check XR7-FnD Board condition as bellows.
Under normal condition
Under defective
How to maintain
1. Power OFF before the circuit check.
2. Check resistance value between P502 pin 1 & 2, and check
Diode voltage on Driver board.
(Detection point is same and measure it at Power OFF status
only)
(Normal: resistance -> 1 ㏀ ± 50Ω,
Diode voltage -> 0.7VDC ± 0.1V)
3. Measure the resistance between P502 pin 3 & 4 and voltage
at Diode in Power OFF condition.
(Normal: Resistance -> 1㏀ ± 50Ω,
Diode voltage -> 0.7VDC ± 0.1V)
4. Measure resistance value between P503 pin 1 & 2 and Diode
voltage under Power OFF status.
(Normal: Resistance -> 1㏀ ± 50Ω,
Diode voltage -> 0.7VDC ± 0.1V)
5. Measure resistance between P503 pin 3 & 4 and Diode
voltage at Power OFF status.
(Normal: Resistance
Diode voltage -> 0.7VDC ± 0.1V )
Error
comes
when X-
ray
exposure
Set exposure value
Push the Ready button
X-ray exposure is OK
Push the X-ray button