Component Testing Procedures - Samsung FTQ353IWUB Service Manual

4. Troubleshooting
4- Electrical Malfunction

Component testing procedures

WARNING
ELECTRICAL SHOCK HAZARD
Disconnect power before servicing the range . Replace all panels before operating range . Failure to do so
can result in death or electrical shock .
FIGURE
Broil Heater Broil Heater
Bake Heater Bake Heater
Drawer Heater Drawer Heater
Door Lock Door Lock
TESTS MEASURE
* Measure resistance values of
heater's terminal after taking off
harness from heater .
* Measure voltage of heater's terminal
after making oven work by pressing
broil keypad .
* Measure resistance values of
heater's terminal after taking off
harness from heater .
*
Measure voltage of heater's terminal
after making oven work by pressing
bake keypad . (Make sure that
voltage has to be measured for more
than 1 minute because heater is
supposed to on-off cycling work .)
* Measure the resistance of values of
heater, after taking off harness from
heater .
* Measure the terminal voltage of
heater after making oven work by
pressing warming drawer keypad .
* Measure the state of micro switch
and motor after taking off harness
from the heater .
* Check whether lock work normally
by pressing cooking time button and
delay start keypad at the same time
for 3 seconds .
53
RESULTS
* Approx : 13 ~ 16Ω
(at the room temperature)
*
Terminal voltage of Broil heater :
AC 240V
* Replace or repair harness
* Approx : 26 ~ 30Ω
(at the room temperature)
* Terminal voltage of bake heater :
AC 240V
* Replace or repair harness
* Approx : 22 ~ 25Ω
(at the room temperature)
* Terminal voltage of Drawer
heater : AC 120V
* Replace or repaire harness
* Lock motor
Resistance : 2500 ~ 2700Ω
(at the room temperature)
voltage : 120V
*
Micro switch
COM-NO
* Replace or repair if harness has
been loosen or disconnected .