Panasonic SD-257WST, Service Manual

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6.1.3. Solenoid/motor operation test (Volume.2) mode
Operation procedure
1. Press the "Timer" key.
Phenomena
• LCD indication: It light up like the right figure.
• Behaviour of device: The solenoid runs for 1 second and
stops for 1 second. Then the motor runs and stops in the
manner of 0.5 sec on/1.5 sec off/0.2 sec on/1.8 sec off, and
repeat once in that manner.
• Restoration: Pressing "Stop/Start" (F) key, the device returns
to the main body initial test mode.
Judgement/Remedy
• Replace the solenoid and/or P.C.Board B if the solenoid
does not work.
• Check and remedy the driving parts, i.e., pulley B, belt or
motor, and/or replace P.C. Board B if the motor does not
work.
• Replace P.C. Board A if the device does not work normally
after following the above remedy.
6.1.4. Heater operation test mode
Operation procedure
1. Press the "Option" key.
Phenomena
• LCD indication: "TEMP" and "POWER ALERT" displayed
• Behaviour of device: The device supplies electric power to
the heater after 1 second and the power is off when the sen-
sor temperature reaches 165 deg.C.
• Restoration: Pressing "Stop/Start" key, the device returns to
the main body initial test mode.
Judgement/Remedy
• Replace the sensor and/or P.C.Board B if the power is not off
when the sensor temperature reaches 165 deg.C.
• Replace the heater and/or P.C.Board B if the heater does
not work normally.
• Replace P.C.Board A if the device does not work normally
after trying the above remedy.
6.1.5. Sensor inspection mode
Operation procedure
1. Press the "Select" key.
Phenomena
• LCD indication: "BAKE “,”RAPID" displayed
• Behaviour of device: The device supplies electric power to
the heater for 3 seconds at an interval of 32 seconds and
controls the sensor temperature at approx. 35 deg.C.
• Restoration: Pressing "Stop/Start" key, the device returns to
the main body initial test mode.
Judgement
• The P.C.Boards and heater work properly when the temper-
ature inside the unit is controlled at approx. 35 deg.C.