Samsung FER710DRS - Page 42

42
4. Troubleshooting
SYMPTOM DIAGNOSIS REMEDY
Oven not
operating
(No power,
No display)
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* Measure an input voltage of terminal
block.
* Check circuit breaker.
* Make sure that the state of wire is
connected with Terminal block.
* Measure voltage of
connector(CN08,CN09) on main
PCB L1~N : 120V
* Measure secondary voltage of Low
Voltage Transformer.
Red + Red color : 13.5V
Yellow + Yellow color : 8V
* Replace of repair if harness has been
loosen or disconnected.
* Replace if resistance of Low voltage
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(Thermal Fuse out)
* Make sure that the relay on sub PCB
is being worked normally.
* Make sure whether harness between
connector (CN04,CN05) on sub
PCB and connector (CN04,CN05)
on main PCB has been loosen or
disconnected.
* Replace sub PCB if relay has been
damaged or there is any cracking on the sub
PCB.
* Repair harness is connected main PCB with
sub PCB.
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inserted into relay on sub PCB or not, take
action follow as;
- Replace or repair harness.
- Replace or repair sub PCB.
* Measure resistance both ends of
terminal on thermostat.
(normal : 0 ohoms)
* Check whether harness is connected
terminal on thermostat has been
loosen or disconnected.
* Measure voltage regulator
(IC02,IC03) on main PCB.
- IC02 : 7812(DC 12V)
- IC03 : 7805(DC 5V)
* Replace the thermostat.
* Replace or repair harness.
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of working of main PCB.
Oven temperature
is risen slowly.
* It will display “E-08” if it fail to reach
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state of room temperature.
* Replace after checking whether there is
any problem with oven sensor.
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* Make sure whether harness is
connected with Broil, Bake and
convection heater has been loosen
or disconnected.
* Repair and replace harness.
* Make sure whether Broil, Bake,
and convection heater has been
disconnected.
* After taking out terminal from each heater,
measure resistance of heater and then
replace that if it is not a normal resistance
value.
* Make sure that heater relay and
pattern on sub PCB.
* Replace or repair relay.
* Replace or repair sub PCB.