Samsung FTQ387LWGX Service Manual page 55

4. Troubleshooting
4-2 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
Convection Heater Convection Heater
Drawer Heater Drawer Heater
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 resistence values of
*
heater s terminal after taking off
harness from heater.
Measure the voltage of heater s
*
terminal after having oven worked,
by pressing convection 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.
55
RESULTS
Approx : 13 ~ 16
*
(at the room temperature)
Terminal voltage of Broil heater :
*
AC 240V
Replace or repair harness
*
Replace or repair sub PCB
*
Approx : 26 ~ 30
*
(at the room temperature)
Terminal voltage of bake heater :
*
AC 240V
Replace or repair harness
*
Replace or repair sub PCB
*
Approx : 70 ~ 73 (at the room
*
temperature)
Terminal voltage of convection
*
heater : AC 240V
Replace or repair harness
*
Replace or repair sub PCB
*
Approx : 22 ~ 25
*
(at the room temperature)
Terminal voltage of Drawer
*
heater : AC 120V
Replace or repaire harness
*
Replace or repaire sub PCB
*