Sharp R-1405 Service Manual page 18

R-1405
R-1406
PROCEDURE
LETTER
5. Reconnect all leads removed from
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after
8. Run the oven and check all functions.
I BLOWN MONITOR FUSE TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. If the monitor fuse is blown when the door is opened, check the secondary interlock relay, primary
CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE SECONDARY INTERLOCK
5. Reconnect all leads removed from components during testing.
6. Re-install the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
J HOOD THERMAL CUT-OUT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. A continuity check across the thermal cut-out terminals should indicate an open circuit unless the
5. Reconnect all leads removed from components during testing.
6. Reinstall the outer case (cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
K HOOD FAN MOTOR TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. If the motor does not turn, touch the FAN button once and check voltage between pins "1" and "2" (Blue
TEST PROCEDURES
plate of the oven cavity with the door opened (in this condition the plunger of the monitor switch is pushed
in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be
defective. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM) terminal
and check the continuity of the monitor circuit.
components during testing.
the outer case is installed.
interlock switch and monitor switch according to the "TEST PROCEDURE" for those switches before
replacing the blown monitor fuse.
RELAY, PRIMARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR
SWITCH FOR PROPER OPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must
be replaced with "monitor fuse and monitor switch assembly" part number FFS-BA016/KiT, even if the
monitor switch operates normally. The monitor fuse and monitor switch assembly is comprised of a 20
ampere fuse and switch.
temperature of the thermal cut-out reaches approximately 140½F(60½C) or more. At that temperature,
the contacts will close. The thermal cut-out opens automatically at approximately 113½F(45½C).
and Black wires) of the 6 pin connector. If 120 Volts appear and the hood capacitor is good, replace
the hood fan assembly. If 120 Volts does not appear, check the motor circuit. The resistance values
of motor terminals are as follows:
COMPONENT TEST
Red
Screw Driver
Primary
Interlock Switch
16
White/ White
Ohmmeter
Monitor Switch