Troubleshooting Guide; Test Procedure - Sharp R-1211 Service Manual

Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected.
When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many
of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which
will be found in the "Test Procedure "section.
IMPORTANT:
If the oven becomes inoperative because of a blown moni-
tor fuse, check the monitor switch, relay (RY1) secondary
interlock relay (RY2), door sensing switch and primary
interlock switch before replacing the monitor fuse. If monitor
fuse is replaced, the monitor switch must also be replaced.
Use part FFS-BA016/KiT as an assembly.
IMPORTANT:
Whenever troubleshooting is performed with the power
supply cord disconnected. It may in, some cases, be neces-
sary to connect the power supply cord after the outer case
has been removed, in this event,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.

TEST PROCEDURE

CONDITION
The oven stops and "ERROR" is displayed or does not end during Sensor Cooking
SENSOR
condition. (Oven does not shut off after a cup of water is boiling by Sensor Cooking.)
COOKING
CONDITION Oven stops at 16 seconds after starting.
NOTE: For additional troubleshooting procedures, please refer back to the R-1200/1201 base model Service
Manual.

TROUBLESHOOTING GUIDE

PROBLEM
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that the leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
When the testing is completed
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. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the outer case (cabinet).
6. Reconnect the power supply cord after the outer case is
installed.
7. Run the oven and check all functions.
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
7
R-1210
R-1211
J O CK