Samsung NE597N0PBSR Servise Manual page 46

4. Troubleshooting
SYMPTOM
*
*
*
*
*
Oven not
operating
(No power,
*
No display)
*
*
*
- IC02 : 7812(DC 12V)
- IC03 : 7805(DC 5V)
*
*
Oven temperature
is risen slowly.
*
*
DIAGNOSIS
Measure an input voltage of terminal
block.
Measure voltage of
connector(CN08,CN09) on main
Measure secondary voltage of Low
Voltage Transformer.
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.
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.
It will display "E-08" if it fail to reach
state of room temperature.
Make sure whether harness is
connected with Broil, Bake and
convection heater has been loosen
or disconnected.
Make sure whether Broil, Bake,
and convection heater has been
disconnected.
Make sure that heater relay and
pattern on sub PCB.
* Check circuit breaker.
* Make sure that the state of wire is
connected with Terminal block.
* Replace of repair if harness has been
loosen or disconnected.
* Replace if resistance of Low voltage
(Thermal Fuse out)
* 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.
*
inserted into relay on sub PCB or not, take
action follow as;
- Replace or repair harness.
- Replace or repair sub PCB.
* Replace the thermostat.
* Replace or repair harness.
*
of working of main PCB.
* Replace after checking whether there is
any problem with oven sensor.
* Repair and replace harness.
* After taking out terminal from each heater,
measure resistance of heater and then
replace that if it is not a normal resistance
value.
* Replace or repair relay.
* Replace or repair sub PCB.
46
REMEDY