Change 1 4-22.19
4-16.1 REPLACING THE CONTROL PANEL ASSEMBLY FOR MODEL 471012 (Continued)
Do not bend the legs on the transistor, when removing the isolator.
(3) Remove the isolator (4) from underneath the power transistor (2).
(4) Inspect the isolator (4) to determine if it has any holes (other than the mounting hole), rips or tears. If
the isolator (4) is damaged, replace the isolator with a serviceable item from stock.
bb. Inspecting the Heating Element.
Do not supply power to a disassembled HWR, as described below, if there
is any danger of wires or components shorting.
In many of the procedures, a check is first made to determine if the
component is wired correctly and, if a repair is made, the user is instructed
to "check the HWR to determine if it is operating correctly." If the repair
was the obvious cause of the problem, then the HWR is reassembled and
checked. However, if the repair may not clearly solve the problem, then the
repair is tested by carefully supplying power for several seconds to the
HWR and observing if the component operates correctly.