Siemens MOBILETT Plus HP Service Instructions Manual page 19

Display messages
Dis-
played
messages
CAL 14
USE 15
* See section "Monitoring the kV and mA values"
** Wiring diagram X037E
Tab. 1
Siemens AG
Medical Solutions
Mode of
Cause
operation
Generator ON The voltage in the
capacitor bank
exceeds 360 V.
During The exposure switch
preparation has been in prepara-
tion position for
longer than 20 s
(max. preparation
time is 10 s if FW
version lower than
V0.1H).
SPR8-220.061.03
Rev. 03
Possible reasons and advice
•
Check the voltage level in the
capacitor bank (see page 130**).
Measure at measuring points
"CAPPOS" and "CAPNEG" on D7.
•
Check if LED V12 on D7 is lit (see
page 130**).
Check all supply voltages on D7.
•
If the voltage is close to 360 V
it can depend on the charger
on D7.
If the transistor in the buck
converter is short-circuited,
the current will flow until fuse U8 on
D8 blows.
Replace the D7 charging unit.
•
The user has kept the exposure
release switch in preparation
position for longer than 20 s after
the "Ready" indicator lights up
(anode speed is correct).
•
If the fault reoccurs, check the
exposure release handle (see page
140**).
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09.03 CS PS 24
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MOBILETT Plus HP