
FIGURE F.16 - Heat Sink Test Points.
3.
Remove the red insulating paint
from the heat sink test points. See
FIGURE F.16.
4.
Construct the circuit shown in
Figure F.17. One 6-volt lantern bat-
tery can be used. Set voltmeter
scale low, at approximately 0-5
volts or 0-10 volts.
IDEALARC DC-600
F-39
TROUBLESHOOTING & REPAIR
a.
Test the voltage level of the
battery. Short leads (A) and
(C). Close switch SW-1.
Battery voltage should be 4.5
volts or higher. If lower,
replace the battery.
FIGURE F.17 - SCR Tester Circuit and SCR connections.
NOTE: DO NOT DISASSEMBLE
THE HEAT SINKS.
ACTIVE SCR TEST