Panasonic SD-253 Service Manual page 9

Check point
Connection of the heater terminals
<Reference value>
Resistance of the heater (in normal status)
2.1.4. Thermistor Operation Test (Perform this test after replacing the defective
thermistor.)
1. Make sure that the main body is in the main body test waiting mode. Press the "select" pad.
2. The LED is illuminated with "BAKE" and "RAPID" shown on the display.
3. Turn on the heater for 3 seconds at 32 second intervals. Set the thermistor temperature at 35°C.
4. Pressing the "Stop/Start" pad returns you to the main body test waiting mode.
Evaluation:
If the thermistor section in the main body remains at approximately 35°C, the thermistor is functioning properly.
2.1.5. Buzzer Operation Test
1. Make sure that the main body is in the main body test waiting mode. Press the "Size" pad.
2. The LED is illuminated with "RAISIN" and "DOUGH" shown on the display.
3. Repeat the ON (0.3 seconds)-OFF (0.7 seconds) procedure 8 times.
4. Pressing the "Stop/Start" pad returns you to the main body test waiting mode.
Remedy:
If the buzzer does not sound during the buzzer operation test, replace control boards A and B.
When the main body operation test is finished, press the "Stop/Start" pad.
When the main body test modes 1.1.1 ~ 1.1.5 are checked and completed successfully, the main body is not experiencing a
problem. Please check the following, as the cause may lie with the user.
Causes and Remedies of user-side problems
Symptom
The baked color is too dark.
The baked color is too light.
The bread does not rise enough.
Diagnosis
Check the connection of the heater terminals. Make a proper connection.
(If no problem is found with the connection)
230V: 96Ω
240V: 104Ω
Cause
The amount of sugar is excessive.
The proper baked color is not selected.
The amount of sugar is insufficient.
The proper baked color is not selected.
The inner lid is dirty and darkened.
The height of the bread was not sufficient.
Bread rising is insufficient due to a high
temperature. (no less than 30°C)
The amount of sugar is insufficient.
The flour was too old.
The flour does not have enough protein.
The amounf ot water is insufficient.
The amount of yeast is insufficient.
The yeast is getting less active.
The yeast is inactive.
The yeast is placed in contact with the water.
The room temperature is too high. (30°C or
higher)
Timer-cooking is performed
ambient temperature.
The amount of flour and water is inappropriate. Measure the correct amount with a measuring
The amount of ingredients is incorrect.
Baked with the "quick course".
The inappropriate size is set.
9
Replace the heater.
Reduce the amount of sugar.
Select the proper baking color.
Add the correct amount of sugar.
Select the proper baking color.
Clean the inner lid.
Use the correct amount of ingredients.
Use water at a temperature of 5°C or lower.
Add the correct amount of sugar.
Use new flour.
Use flour that contains a lot of protein.
Measure the correct amount of water with a
measuring cup.
Measure the correct amount of yeast with a
measuring spoon.
Put the yeast in a sealed package and keep it in
the refrigerator.
Do not keep the yeast at a high room
temperature.
Make sure to cover the yeast with the flour.
Use water at a temperature of 5°C or lower.
under a high Chose a location with a lower temperature to
perform cooking.
cup and scale.
Use the exact amount written in the operation
manual.
Choose the appropriate course to bake.
Make the correct setting.
SD-253
Remedy
-
-
Remedy