Siemens MOBILETT Plus HP Service Instructions Manual page 26

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Dis-
played
messages
CAL 26
CAL 27
* See section "Monitoring the kV and mA values"
** Wiring diagram X037E
Tab. 1
MOBILETT Plus HP
Mode of
Cause
operation
Generator ON The CMOS memory
cannot be read or
programmed.
Generator ON Error in ROM mem-
during startup ory. Check sum is
incorrect.
SPR8-220.061.03
Rev. 03
Display messages
Possible reasons and advice
•
Check all supply voltages on D1
(see page 110**).
•
Check the voltage in the backup
battery (> 2.8 V) and the battery
jumper (see page 110**).
•
If all power supply voltages are
present, the error is probably on
D1.
If the message "CAL 26" occurs
repeatedly or if the message can
not be acknowledged by pressing
kV+ or by switching the unit OFF
and ON, replace D1.
•
Check that all supply voltages on
D1 are present (see page 110**).
•
The ROM containing the program
is defective. Replace the software
(IC's I72, I66 and I74) on D1 (see
page 110**).
•
If the error reoccurs after replacing
I72, I66 and I74, replace D1.
Page 14 of 22
09.03 CS PS 24
Siemens AG
Medical Solutions