BRIDGE
TEST
Remove the bridge from the pressure control box and
perform this test to determine
if
the bridge is functional.
See
BRIDGE
RECTIFIER REPLACEMENT,
page 24.
ohms scale.
Useacontinuitytester,suchasmulti-metersetonthexi
test, it must be replaced.
All tests must be performed.
If
the bridge fails even one
Fig 20
-
1 shows the position
of
the wires
on
the bridge.
indicated and then check
the,continuity.
Using the chart at the right, connect the meter wires as
Fig
20-1
Check For
1.
Line short
Ohmmeter
Reading
Connect meter
+
to bridge ACl
Connect meter
-
to
bridge AC2
2. Diode 1
Connect meter
+
to
bridge
-
Connect meter
-
to
bridge ACl
Connect meter
+
to bridge ACI
Connect meter
-
to bridae
-
""""""""""__
3.
Diode 2
I
No
continuib
Continuity
No
continuity
-
-
- -
-
-
-
-
Connect meter
+
to bridge
-
Connect meter
-
to bridge AC2
Connect meter
+
to bridge AC2
Continuity
Connect meter
-
to bridge
+
Connect meter
+to
bridge
-
No
continuity
Connect meter
-
to
bridge AC2
Connect meter
+to
bridge
+
No
continuity
Connect meter
-
to bridge AC1
Connect meter
+
to bridge
+
No
continuity
Connect meter
-
to
bridge
-
No
continuity
Connect meter
-
to bridge
-
Connect meter
+
to bridge
+
Continuity
""""""""""""""""
4. Gate 1
5.
Gate 2
5.
Diode
3
""""""""""""""""
20
307-670
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