IDEALARC DC-600
F-50
TROUBLESHOOTING & REPAIR
NOTE: If it is necessary to remove and
replace only one or two individual
SCRs and they are easy to work on,
use these procedures.
1.
Disconnect main AC input power
supply to the machine.
2.
Identify and label the following :
a.
The transformer secondary
lead (heavy aluminum conduc-
tor) connected to the anode of
the SCR heat sink for each
assembly to be removed. See
Figure F.19.
b.
The snubber leads for each
SCR heat sink to be removed.
See Figure F.19.
SCR / SCR OUTPUT BRIDGE REMOVAL
FIGURE F.19 - Individual Heat Sink Removal
A. REMOVAL OF INDIVIDUAL SCR HEAT SINK
3.
Disconnect the transformer sec-
ondary lead to the anode of the
heat sink assembly using 1/2"
socket wrench and 1/2" open end
wrench.
4.
Disconnect the gate lead to the
SCR.
a.
If the gate lead is cut, it will
have to be re-soldered when
the replacement SCR is
installed.
b.
If a new snubber board is used,
install properly.