5-1
CONTROL POWER & CAVITY
LIGHT TRANSFORMERS
Refer to page 4-9 for the procedure for servic-
ing the control power and cavity light transform-
ers.
1. Turn off gas supply and disconnect power
to the range.
2. Disconnect the wires from the transformer’s
terminals.
3. Set the ohmmeter to the R X 1 scale.
4. Touch the ohmmeter test leads to the
transformer LINE (primary) terminals. The
meter should indicate 40 to 45 Ω.
5. Touch the ohmmeter test leads to the
transformer LOAD (secondary) terminals.
The meter should indicate less than 1 Ω.
Primary
120 VAC
40 - 45 Ω
Secondary
20.3 VAC
Less than 1 Ω
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
LOAD (SECONDARY)
LINE (PRIMARY)
COMPONENT TESTING
Before testing any of the components, perform
the following checks:
• The most common cause for control failure is
corrosion on connectors. Therefore, discon-
necting and reconnecting wires will be nec-
essary throughout test procedures.
• All tests/checks should be made with a VOM
or DVM having a sensitivity of 20,000 ohms-
per-volt DC, or greater.
• Check all connections before replacing com-
ponents, looking for broken or loose wires,
failed terminals, or wires not pressed into
connectors far enough.
• Resistance checks must be made with power
cord unplugged from outlet, and with wiring
harness or connectors disconnected.
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