TM11-6125-256-34
NOTE
(1) Measure the voltage across capacitor C5 The
voltage should be as shown in fig 4-3 3 If the voltage
In the following voltage measurements, the
typical waveshapes given are for a normal
operating regulator During troubleshooting,
and capacitor C5 for a faulty component
while the ac output is below 120 volts ac
(2) If the waveshape measured in step (1) indi-
(until the problem is corrected), the measure-
cates that diode CR11 and associated components are
ments obtained will be similar to those shown,
functioning normally, make measurements at the base
but at a reduced amplitude When the prob-
and collector of transistor Q9 If the measurements are
lem is localized to a particular circuit, use
not approximately as shown in fig 4-3 4, localize the
fig. FO-2 1 as an aid in localizing the fault
failure within this circuit
to a component within this circuit
