Owandy Radiology i-max touch, Service Manual

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SERVICE MANUAL
Troubleshooting
I-Max Touch 8-17
8.2.5. Errors with code from E700 to E799
WARNING:
Those errors are related to the X-ray generator, so they can be safety
related.
In case of Error messages E759 and E755, the system must be
immediately powered off, because there is an unexpected emission
(E759) or the emission has not been terminated into the expected
time.
WARNING:
On the Generator board (A10) there are dangerous high voltage,
230 V AC and 400 VDC.
Before accessing the Generator CPU and power board (A9 and A10),
it is mandatory to switch off the mains and wait up to 2 minutes in
order to allow the discharge of the capacitor
.
8.2.5.1. E750: No power to the Generator board
This message is signalling that the Generator board (A10) is not powered.
Check that if LED H3 of the Generator board is ON; in affirmative case,
check connector X53 insertion and insert it correctly. Check the voltage
between TP1 and TP2; it should be 10 V DC

2 V; if the value is inside
the range, replace the Generator CPU board (A9). If the value is zero (or
very low), replace the Generator board.
If LED H3 is off, perform the appropriate operations as described in the
previous chapter.
8.2.5.2. E751: Over voltage kV
This message is displayed when a value higher than expected has been
detected on the Generator board (A10).
Check that connector X57 is well inserted. With the connector inserted,
measure the resistance between pins 2 and 4 of connector (harness to
tubehead) that should be 13.3k ± 2% while is 14.3k ± 2% between pins 4
and 3 of the same connector; if correct values are measured, replace
before the tubehead and, eventually, the Generator board.
If incorrect values are measured, replace the tubehead.