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32551-IMG rev 6
WARNING!
AMD BOARD HAS FLOATING GROUND OF 230 VOLTS
3
Immediately after pressing the exposure button, the testpoints TP1
and TP2 located at the edge of the AMD board (X4 pin 2 and X5 pin 2)
show voltage of 230V. With a true RMS (Digital Volt Meter) the
readout should be 30-42 VAC after 1.5 seconds (run voltage). It is
important also that the test #57 is completed without error.
NOTE!
Pay attention to potentiometer setting. It is different for 50 Hz and 60 Hz.
4
If necessary, adjust the anode running voltage with trimmer
potentiometer R100 on AMD Board.
5
Exit the test #57 and also the service mode. Test the unit in normal
manual mode with maximum mAs value, repeat exposures for 5
times and verify that no error appears.
Fig 4.5.
Anode motor drive board (AMD)
6
During the exposure, listen that the first one of the power relays (K1)
on the INVERTER board is activated as the exposure button is
pressed, and that (K2) is activated after the preheat time, after app.
1.5 s.
7
Check also that on the INVERTER Board, the LEDs H2, H4, H5, H6, H7,
H11 and H12 and on the FILAMENT CONTROL board, the LEDs H2, H4,
H5, H6 and H7, turn on during the exposure.
GE Healthcare
4 Alpha RT softstart procedure
41
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