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4 Alpha RT softstart procedure
4.7
T
RANSFORMER VOLTAGE TAPPING
Measure the main voltage and connect the main transformers as in the
table below.
Main voltage
198 - 230
231 - 250
251 - 264
Table 4.1 Transformer voltage tapping
4.8
P
OWERING UP
1
Turn the unit ON from the mains switch.
NOTE!
The "TUBEFAIL" led H3 on the FILAMENT CONTROL Board is usually lit
before the first exposure after the unit is switched on. The activation of the
EXT signal turns the led off, and after a successful exposure the led
remains off.
2
Check that the display shows reset (r.ES in the timer display), on the
POWER SUPPLY board all LEDs are lit (3 pcs), on the FILAMENT
CONTROL board LEDs H8, H9 and H10 are lit, on the INVERTER Board
LEDs H8, H9 and H10 are lit.
3
Go into manual mode by pressing Autoexp. Select service mode by
pressing kV- and density- buttons for 3 sec. Select service mode
menu by pressing Density+ and Density- buttons.
4.9
A
NODE RUN VOLTAGE CHECK
ADJUSTMENT TO
NOTE!
All testing should be performed in service mode.
1
Press kV- or kV+ buttons to scroll until the kV display shows #57 and
the mAs display shows Ano. This is the anode run voltage measuring
mode without x-rays. Press Autoexp to enter into Ano program. If you
need to adjust the anode run to 50 Hz mains network, proceed to
step 3.
2
Press exposure button to run anode. Timer display will show running
time which is limited to 5 seconds. Check that no error messages are
displayed during that time. After this check that the anode motor
plate stops running (listen to the sound of the rotating anode) and
that no error messages are displayed on Control Panel timer-screen.
If this is not the case, perform step 3.
40
Transformer connection
220 (factory setting for Europe and U.S.A)
240 (factory setting for G.B and France)
260
(P
#57 A
R
50 H
Z MAINS NETWORK
GE Healthcare
)
NO
OR
32551-IMG rev 6
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