Chapter 7 Page no. 542
JC-ELE-A-005.fm
GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A005 - Check Supply Voltages
CAUTION
If the voltmeter reading is outside this range, open generator Mains Supply Switch 200-S1
immediately (turn it to the "0” position). Then check mains voltage selection wire SEL on
Generator Mains Distribution Board 200-PL1
(see Job Card PHY A016 - AC Connection).
7 CHECK GENERATOR AND GANTRY DC SUPPLY VOLTAGES
7-1 Check Generator DC Supply Voltages
1. Power the Generator on.
2. On the Generator CPU Board 400-PL3, measure the DC voltage between TP110 and TP111 (GND).
It must be in the range +5.1±0.05 V. If necessary, adjust the voltage.
WARNING
The adjustment is made using the potentiometer located on the low voltage power supply
unit (on the rear of the board mounting plate).
To avoid any risk of electric shock, do not touch any of the other components on the sup-
ply (later models are protected by a transparent cover).
3. On the Generator Interface Board 400-PL2, measure the DC voltage (+12 V nominal) between PT3
and PT4. The voltage must be in the range +11.5 VDC to +12.5 VDC.
4. On the Generator Interface Board 400-PL2, measure the DC voltage (-12 V nominal) between PT5
and PT4. The voltage must be in the range -11.5 VDC to -12.5 VDC.
Note:
Voltages measured in steps 2 and 3 above depend on the +5 V adjustment mentioned in step 1.
5. If the potentiometer located on the low voltage power supply unit (step 1) has been adjusted, apply a
suitable locking compound to prevent further movement.
8 CHECK MAINS DISTRIBUTION RACK INPUT
If the above check for Generator voltages was correct, this confirms that the correct voltage has been
selected for the Generator input voltage.
Before switching power to the Mains Distribution Rack, check that the same voltage has been
selected for the Mains Distribution Rack transformer input tap.
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