Tuttnauer 1730EK, Technical Manual

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51
Corrections
—
Tighten loose screw
s.

Reconnect groundi
ng cabl
e.

Repair or replace the faulty item.

Replace f
aulty power supply.

Pos
sib
le ca
use ch
eck
-u
p and tes
ts
—
Check with the positive pr
obe of
the
multitester the voltage at different
groun
ding
po
ints of the aut
oclave, on
the ANL-T2 and DIG-T2 boards, on the enclosure of the electric box an
d
the main grou
nding
screw
of the
machine.
The voltage difference
s mu
st be less
than 5mV. Higher voltag
e may indicate that
ANL-
T2 board fastening screws
are
loose or that
the power supply cable is
loose.
1.6.2
Check the 12
VDC voltage.
—
Connect the n
egative probe of the
multitester to TP1 (GND).
—
Connect the positive probe
of the
multitester to TP3. The indi
cation of
the instrument must be 10.
8-12.5V.

If indication is not as specified,
disconnect th
e output co
nn
ector of the
power supply
. If the right
v
alue is
achieved ther is a short circuit.

Identify and locate the short circuit.
If instrument indication is
below or
above specified range the power supply is faul
ty.
1.6.3
If neither 12
V nor 5V vol
tages are output:
—
Check the voltage transfer
to the
power
supply t
hrou
gh
the connect
or
JP2
on the AC - T
1 board.
Symp
to
m
1. (cont.)