Siemens MOBILETT Plus Service Instructions Manual page 15

Display messages
Dis-
played
messages
CAL 7
Err 9
* See section "Monitoring the kV- and mA-controls"
** Wiring diagram X037E
Tab. 1
Siemens-Elema AB
Solna, Sweden
Mode of
Cause
operation
During The exposure time is
exposure too long.
During When measuring the
exposure kV value, a large
high tension asym-
metry is detected.
SPR8-215.898.02
Rev. 01
Possible reasons and advice
The maximum exposure time is 2 s.
•
The exposure is normally
interrupted earlier by "Err 5".
•
Check the capacitance in the
capacitor bank, refer to section
"P03 - Capacitor bank and
charging test".
•
Check the filament heating, refer to
section "P01 - Filament test".
•
Check the tube current in
measuring point "MAPOS" on D1,
see page 140 and 141.
•
Check the current to the single
tank, see section "Error diagnosis
HT and single tank".
Normally the kV value is symmetric
around ground. The acceptable devi-
ation is ± 19.5 kV. This corresponds
to HTD 2.5 V± 0.5 V.
•
Intermittent measurement cables
or defective single tank.
•
Check the measurement cable K9
between D1 and the single tank,
refer to page 140**.
•
Check the current to the single
tank, refer to the section "Error
diagnosis HT and single tank".
•
Measure the HTD signal on D1 and
compare it with notes and curves
on page 140 and 141**.
Page 5 of 22
01.02 SPS-UD
2 - 5
MOBILETT Plus/ Plus E