Service Manual 599337A: 302B Series Titan Oven
July 2006
32
5.5 SYMPTOM: Faulty Temperature or Oven Mode L.C.D.
Modules
POSSIBLE CAUSES:
Loose connection to the clock module
Faulty temperature or oven mode L.C.D. module
DIAGNOSIS:
If the fault is that one segment of the display is always on or always off, replace the
L.C.D. Module. (refer to Servicing Instructions Section 7.7)
If the L.C.D. module is displaying incorrect information, check the connections from
the L.C.D. module to the clock and switch modules. If there are no connection faults,
replace the L.C.D. module.
Replace the switch module if no other faulty components can be found. (refer to
Servicing Instructions Section 7.6)
5.6 SYMPTOM: “DOORLOCK” and “PROBE” showing for
lower cavity (double oven only)
POSSIBLE CAUSES:
Lower cavity power module has no power
DIAGNOSIS:
Check the connection between upper and lower cavity power modules.
Test for the correct supply voltage to the lower cavity power transformer.
120volts
Check the connection from the power transformer to the lower cavity power module.
Check for a blown power module fuse by testing for 12
VDC
between pins 1 and 6 of
the 12-way clock connector on the power module. (refer to Technical Overview
Section 2.25)
If there is no 12
VAC
then the fuse has blown. Replace the power module. (refer to
Servicing Instructions Section 7.9)
Tracing the cause of a blown power module fuse:
Check the resistance to earth of the lamp wiring and replace if there is a short circuit.
(refer to Servicing Instructions Section 7.14)
Check the power transformer by testing for 12
VAC
on the 2-way connector into the
power module. Replace the transformer if the voltage exceeds 12
VAC
.