EPS 45-80 High-Voltage Generator
7-20
Technical Manual P/N 9894.00.G6
II- Inverter Board Power On Self-Test
At every power on, the generator performs a self test to verify the status of the 3-Phase inverter
slots. The generator will NEVER change a status for a better one, for example changing "Stop" for
"OK". Only the service representative can update the Inverter status register (for example, after
replacement). But the generator will change the register status for a worse state at any moment
that
condition occurs. The possible results coming out of the self-test is shown in Table 81 below.
Table 81-
Possible actions done by the generator after every Inverter Power-On Test
Compared against EEPROM Status
Power On
Test Result
STOP DUMMY FUSE BAD
OK
STOP
1. No change
2. Stop
1. Write STOP
2. Stop
1. Write STOP
2. Stop
1. Write STOP
2. Stop
1. Write STOP
2. Stop
Dummy 1. No change
2. Stop
1. No change
2. Continue
1. Write STOP
2. Stop
1. Write STOP
2. Stop
1. Write STOP
2. Stop
IfR
1. No change
2. Stop
1. Write STOP
2. Stop
1. No change
2. Continue
1. No change
2. Continue
1. Write FUSE
2. Stop
IFr
1. No change
2. Stop
1. Write STOP
2. Stop
1. Write BAD
2. Stop
1. No change
2. Continue
1. Write BAD
2. Stop
IFR
1. No change
2. Stop
1. Write STOP
2. Stop
1. Write BAD
2. Stop
1. No change
2. Continue
1. No change
2. Continue
Legend:
Dummy
: A Dummy board is installed
I fuse rail : 3-Phase Inverter board installed, bad fuse (f), bad rail (r) supply
I fuse Rail : 3-Phase Inverter board installed, bad fuse (f), good rail (R) supply
I Fuse rail : 3-Phase Inverter board installed, good fuse (F), bad rail (r) supply
I Fuse Rail : 3-Phase Inverter board installed, good fuse (F), good rail (R) supply
Continue
: Do not display Operator message and go to normal mode
No change : Do not change the EEPROM current status
Stop
: Disable all exposure switches and display
"Inverter Problem # _" message.
Write BAD /FUSE / STOP :
Change the EEPROM current status for BAD / FUSE or STOP
III- Inverter Board Test on PREP
During PREP, the 3-Phase Inverters are tested and each one receives either "BAD" or "GOOD"
status condition. This status is used to update, if need be, the Inverter register as shown in Table 82.
Table 82-
Possible actions done after Inverters PREP Test
Compared against EEPROM Status
Operational
Test Result
STOP DUMMY FUSE BAD
OK
BAD
1. No change
2. Stop
1. No change
2. Continue
1. Write BAD
2. Stop
1. No change
2. Continue
1. Write BAD
2. Stop
GOOD
1. No change
2. Stop
1. Write STOP
2. Stop
1. No change
2. Continue
1. No change
2. Continue
1. No change
2. Continue
