Quantum QG-5000

Chapter 5 Service Instructions
Revision W HF Series X-ray Generators - Service Manual
5-38 Quantum Medical Imaging, LLC
Plus
15V
Missing or incorrect +15 VDC sup-
ply voltage.
1. Access Service Mode>Calibra-
tion>AD Calibration menu. Verify
+15 VDC voltage is within toler-
ance per Table 3-8. If not, cali-
brate in accordance with "A/D
Calibration Procedure" in Chapter
3.
2. Check for +15 VDC (±10%) on
Power Supply Board A6 (AY40-
005T) test point TP10. If 0 VDC,
check fuse F3 on Interface Board
A9 (AY40-023T). If F3 is open,
replace fuse. If there still is no +15
VDC at A6TP10, replace Power
Supply Board.
3. If voltage at A6TP10 is not 0 VDC,
but is too low, check if another
board is shorting the +15 VDC out-
put. Disconnect output cable A6J2
and measure voltage at A6TP10. If
within range, check other boards
for shorts. If not within range,
replace Power Supply Board.
Plus
24V
Missing or incorrect +24 VDC sup-
ply voltage.
1. Access Service Mode>Calibra-
tion>AD Calibration menu. Verify
+24 VDC voltage is within toler-
ance per Table 3-8. If not, cali-
brate in accordance with "A/D
Calibration Procedure" in
Chapter 3.
2. Check for +24 VDC (±10%) on
Power Supply Board A6 (AY40-
005T) test point TP8. If 0 VDC,
check fuse F4 on Interface Board
A9 (AY40-023T). If F4 is open,
replace fuse. If there still is no +24
VDC at A6TP8, replace Power
Supply Board.
Table 5-1. Error Messages and Possible Cause(s)
Error
Message
Possible Cause(s)
Remedial Action