Doc. CEI12166
Rev. 1
Pag. 40 Of 47
3.4.7 The travel transducer does not operate
First of all, verify that there are 5 V between sockets (18); if not, check for fuse (20): if it is open,
replace it.
If the fuse is OK or if the + 5 V is not there, use an external voltage and connect it to input (17). Start a
test and verify: if the voltage is measured, then the problem is on the + 5 V supply. In this instance, the
fault is located on the Front-Panel board (60), PWA11430: it is necessary to return the test set. Also if
the measurement is not performed, the test set should be returned for repair.
3.4.8 The micro-Ohmmeter does not operate
The micro-Ohmmeter operation is controlled by board (65); the power comes from the big capacitor
(82). To replace the board, act as follows:
. First of all, VERIFY THAT THE CAPACITOR IS COMPLETELY DESCHARGED: given the big
capacitance value, it takes a long time to dissipate its energy. The operating voltage is 10 V; if it is not
completely discharged, use a 100 Ohm 10 W resistor. DO NOT DISCGARGE BY SHORT-
CIRCUITING LEADS: THIS COULD EVEN MAKE THE CAPACITOR TO EXPLODE!
. Next, remove the board (65), and replace it.
3.4.9 Problems during upgrade
The firmware upgrade is performed via software. When the file is transferred into CBA1000, the
following message is displayed.
When the file has been transferred, the firmware upgrading is performed: this is displayed by the
message:
When the message disappears, the update is completed, and the test set can be operated.
If during the Upgrade operation the power went off, and the test set is no more operational, to recover
the situation proceed as follows. At power-on, keep the START button pressed until the diagnostic is
finished, then release it. The test set goes to an “HW DEBUG” mode, and it accepts the downloading.
