Lincoln Electric IDEALARC CV-305 - Manual (Page 47)

MAIN TRANSFORMER TEST PROCEDURE
(CONTINUED)
TROUBLESHOOTING & REPAIR F-15 F-15
IDEALARC® CV-305
13. Locate the following leads connected to output rec-
tifier bridge: #221, #222, and #223. See Figure
F.3.
FIGURE F.3 - Location of leads #221, #222, and #223.
14. Test for 36 VAC.
15. If the correct three-phase input voltage is being
applied to the main transformer and some or all of
the secondary voltages are incorrect or missing,
the transformer may be faulty. Replace.
11. Locate lead #42A connected to circuit breaker CB1
and pin "I" on the 14 pin amphenol connector on
the Case Front. See Figure F.2.
FIGURE F.2 - Main Transformer Test Points.
12. Test for 42 VAC between lead #42A at the circuit
breaker and pin "I" on the on the amphenol con-
nector.
a. If voltage is missing, check for loose or broken
wires between the test points and the main
transformer. See wiring diagram.
b. If voltage is present, continue test.
FROM LEAD
#221
#223
#222
TO LEAD
#222
#221
#223
FRONT PANEL
14 PIN AMPHENOL
CONNECTOR (PIN I)
CB1 CB2
LEAD #222
LEAD #221
LEAD #223
MAIN TRANSFORMER
Re
tu
rn
to
Se
ct
io
n
T
O
C
Re
tu
rn
to
Se
ct
io
n
T
O
C
Re
tu
rn
to
Se
ct
io
n
T
O
C
Re
tu
rn
to
Se
ct
io
n
T
O
C
Re
tu
rn
to
M
a
st
e
r
T
O
C
Re
tu
rn
to
M
a
st
e
r
T
O
C
Re
tu
rn
to
M
a
st
e
r
T
O
C
Re
tu
rn
to
M
a
st
e
r
T
O
C