Siemens MOBILETT Plus Service Instructions Manual page 24

2 - 14
Dis-
played
messages
CAL 26
CAL 27
* See section "Monitoring the kV- and mA-controls"
** Wiring diagram X037E
Tab. 1
MOBILETT Plus/ Plus E
Mode of
Cause
operation
Generator ON The CMOS memory
cannot be read or
programmed.
Generator ON Error in ROM mem-
during start-up ory. Check sum is
not correct.
SPR8-215.898.02
Rev. 01
Display messages
Possible reasons and advice
•
Check all supply voltages on D1,
refer to page 110**.
•
Check the voltage in the backup
battery (>2.8 V) and the battery
jumper, refer to 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 switching the unit OFF and
ON, replace D1.
•
Check that all supply voltages on
D1 are present, refer to page 110**.
•
The ROM containing the program
is defective. Replace the software
(IC's I72, I66 and I74) on D1 ; refer
to page 110**.
•
If the error occurs again after
replacing I72, I66 and I74, D1
should be replaced.
Page 14 of 22
01.02 SPS-UD
Siemens-Elema AB
Solna, Sweden