Chapter 5 Service Instructions
HF Series X-ray Generators - Service Manual Revision W
Quantum Medical Imaging, LLC
5-39
Plus
24V
(Cont’d)
3. If voltage at A6TP8 is not 0 VDC,
but is too low, check if another
board is shorting the +24 VDC out-
put. Disconnect output cable A6J2
and measure voltage at A6TP8. If
within range, check other boards
for shorts. If not within range,
replace Power Supply Board.
Plus
5V
Missing or incorrect +5 VDC sup-
ply voltage.
1. Access Service Mode>Calibra-
tion>AD Calibration menu. Verify
+5 VDC voltage is within tolerance
per Table 3-8. If not, calibrate in
accordance with "A/D Calibration
Procedure" in Chapter 3.
2. Check for +5 VDC (±10%) on
Power Supply Board A6 (AY40-
005T) test point TP1. If 0 VDC,
check fuse F8 on Interface Board
A9 (AY40-023T). If F8 is open,
replace fuse. If there still is no +5
VDC at A6TP1, replace Power
Supply Board.
3. If voltage at A6TP1 is not 0 VDC,
but is too low, check if another
board is shorting the +5 VDC out-
put. Disconnect output cable A6J2
and measure voltage at A6TP1. If
within range, check other boards
for shorts. If not within range,
replace Logic Board A1 (AY40-
006S).
Prep
WDT
Exposure sequence disabled due
to loss of communication with
PREP watchdog timer.
Call Technical Service/Support.
Table 5-1. Error Messages and Possible Cause(s)
Error
Message
Possible Cause(s)
Remedial Action
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